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EP1661490B1 - Height adjustable table with cross-legs - Google Patents

Height adjustable table with cross-legs Download PDF

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Publication number
EP1661490B1
EP1661490B1 EP05111340A EP05111340A EP1661490B1 EP 1661490 B1 EP1661490 B1 EP 1661490B1 EP 05111340 A EP05111340 A EP 05111340A EP 05111340 A EP05111340 A EP 05111340A EP 1661490 B1 EP1661490 B1 EP 1661490B1
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EP
European Patent Office
Prior art keywords
lever
platform
leg
scissor
scissor element
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
EP05111340A
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German (de)
French (fr)
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EP1661490A1 (en
Inventor
Ernst Langewellpott
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Individual
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Individual
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Publication of EP1661490A1 publication Critical patent/EP1661490A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/16—Tables 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

Definitions

  • the present invention relates to a scissors lift table with a platform which can be spaced from the ground by pivoting in front of below the platform arranged Scherengliedem.
  • a generic scissor lift table is from the DE 199 16 509 known, in which the scissor members, which are connected to each other at a common axis of rotation, are pivoted against each other by means of a spindle drive, which is between the legs of the scissor members, which are adjacent to the platform, and these can move towards each other.
  • a spindle drive which is between the legs of the scissor members, which are adjacent to the platform, and these can move towards each other.
  • This lever is also hinged to a second rocker arm, the other end is hinged to the upper leg of that scissor member on which the spreader 40 is guided, but in a region between spreader 40 and the common axis of rotation.
  • the known lever arrangement that the Spreader is supported via a V-shaped lever assembly on the underlying portion of the other scissor member.
  • a scissor lift table with at least one pair of scissor members 20, 30 and a platform 1 arranged above it, in which the pair of scissor members 20, 30 is connected to one another rotatably in a common axis of rotation 2.
  • the description refers to a pair of scissor members, but preferably two of which are arranged parallel to each other below the platform and several can be arranged behind each other, so that in each case a pair of scissor members is articulated with its first ends to the second ends of a further pair of scissor members ,
  • An expansion body 40 is arranged displaceably on a first guide track, which is located on the upper leg 31.
  • the expansion body 40 is drivable in the direction of the upper leg 21 movable.
  • the movable drive of the expansion body 40 in the direction of the upper leg 21 can be realized by a known spindle drive with motor 42 and spindle 41 which is disposed between the upper leg 21 and the spreader 40 to the distance between spreader 40 and the point of application 23rd of the spindle drive on the upper leg 21 to change.
  • the point of application 23 on the upper leg 21 can be designed as a pivotable mounting.
  • the spindle nut is preferably included in the expansion body 40, in which the spindle 41 is rotatably mounted.
  • a spindle drive moves the expansion body 40 toward or away from the point of application 23, the point of application 23 being arranged in the region of the upper leg 21 of the scissor member 20 or being indirectly connected thereto, for example by attachment to the platform, so that when moving the spreader 40 by rotation of a spindle which is guided in a spindle nut of the spreader 40, spreader 40 and point 23 can be moved toward or away from each other.
  • the spreader 40 is drivable by at least one belt drive in the direction of the point of application 23 drivable.
  • Such a belt drive is controlled by a motor drive shortened and extendable, for example, by a motor-driven worm gear that is controllable to the belt by means of driven rollers on or unwind.
  • a motor drive shortened and extendable for example, by a motor-driven worm gear that is controllable to the belt by means of driven rollers on or unwind.
  • the length of the belt 43 controlled between spreader 40 and point 23 can be shortened or extended, while the motor drive between point 23 and spreader 40 may be arranged, or the belt may be connected via a first guide roller 44, which is arranged in the point of application 23, and a second deflection roller 45, which is arranged in the region of the common axis of rotation 2, to be deflected and be shortened and extendable by a motor drive, which is arranged on the lower leg 32.
  • the expansion body 40 is articulated at a first end 51 of a first lever 50, the second end 52 of this first lever 50 being articulated at a first end 61 of a second lever 60.
  • the second end 62 of the second lever 60 is slidably guided on a second guide track 34 which is arranged on the lower leg 32 of the second scissor member 30.
  • the second guideway 34 is located above the second end 62, i. between the second end 62 and platform 1, so that the second end 62 runs from below against the second guide track 34.
  • the second lever 60 is pivotally mounted on the lower leg 22 in its pivot point 63. This pivot point 63 is disposed between the first end 61 and the second end 62 of the second lever 60.
  • first lever 50 which is arranged between spreader 40 and second lever 60, wherein the lever 60 is articulated on the lower leg 22 in the pivot point 63, causes the forces required when lifting or lowering the platform 1, the forces between spreader 40 and attack point 23 are to be reduced and are about the same size over the entire pivoting range.
  • This uniform force relationships between open and closed state of the scissor members 20 and 30 with raised or lowered platform 1 result in the inventive scissor lift table from the fact that the second pivot arm 60 as an additional lever between the second guide track on the lower leg 32 and the first Lever 50 acts around its pivot point 63, so that the first lever 50 supports the expansion body 40 to move the upper leg toward each other when a force between spreader 40 and point 23 acts and these moves toward each other.
  • the first guide track 33 is designed in its upper portion 33A, which is arranged in the direction of the upper leg 31, in the form of a curved upward curve in the direction of the platform, while its lower portion 33B, which in the direction of the has common axis of rotation 2, approximately in a straight line parallel or at a shallow angle inclined to the upper leg 31 is designed.
  • the second guide track 34 on the lower leg 32 may be approximately straight, approximately parallel to the lower leg 32, or at a slight angle thereto.
  • the second guideway 34 in the form of a cam control in an upper portion 34A facing towards the common axis of rotation 2 has an arcuate course directed towards the platform 1 facing towards the bottom, i. to the side facing away from the platform 1 of the lower leg 32 is open and concave and the second end 62 of the second lever 60 slidably receives, while an adjacent lower portion 34 B of the second guide track 34 in the direction away from the common axis of rotation 2 approximately parallel to the lower Leg 32 may be linear or may have a curved course, which bulges slightly convex towards the bottom.
  • a particularly favorable lever ratio is made possible in particular when lifting the platform from the lowermost position, since the second end 62 of the second pivot lever 60 in the upper portion 34A of the second guideway 34 is displaceable, so that with little movement the upper legs 21 and 31 to each other to substantially no change in position of the second end 62 of the second lever 60 takes place.
  • the first lever 50 in this position the movement of the spreader 40 particularly favorable on the first guide track 33, while in a further raised state of the platform 1, the second end 62 of the second lever 60 in the lower portion 34 B of the second guide track 34 passes , so now the movement of the lower leg 32 down, ie opposite the platform 1 causes its first end 61 to move upwards, i. is pivoted in the direction of the platform 1, so that the first lever 50 transmits this upward movement on the spreader 40 on.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Sowing (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Knitting Machines (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The scissors lift is operated by a spindle or belt drive (43). This moves a slide (40) in a guide slot (33) in the upper end of one leg (30) of the scissors. A lever (50) is pivoted on the slide and its other end is linked to a second lever. The other end of this slides in a second slot (34) in the lower end of the leg.

Description

Die vorliegende Erfindung betrifft einen Scheren-Hubtisch mit einer Plattform, die durch Verschwenken vor unterhalb der Plattform angeordneten Scherengliedem vom Boden beabstandet werden kann.The present invention relates to a scissors lift table with a platform which can be spaced from the ground by pivoting in front of below the platform arranged Scherengliedem.

Ein gattungsgemäßer Scheren-Hubtisch ist aus der DE 199 16 509 bekannt, bei dem die Scherenglieder, die an einer gemeinsamen Drehachse miteinander verbunden sind, mittels eines Spindeltriebs gegeneinander verschwenkt werden, der zwischen den Schenkeln der Scherenglieder, die der Plattform benachbart sind, angeordnet ist und diese aufeinander zu bewegen kann. Dabei werden gleichmäßigere Hebelkräfte über den Hubbereich, insbesondere in der unteren Stellung der Plattform dadurch erreicht, dass der Spreizkörper am ersten Ende eines Hebel angelenkt ist, dessen zweites gegenüberliegendes Ende auf einer Führungsbahn am gegenüberliegenden unteren Schenkel des anderen Scherenglieds geführt ist. Das zweite Ende dieses Hebels ist überdies an einem zweiten Schenkhebel angelenkt, dessen anderes Ende an dem oberen Schenkel desjenigen Scherenglieds angelenkt ist, an dem auch der Spreizkörper 40 geführt ist, jedoch in einem Bereich zwischen Spreizkörper 40 und der gemeinsamen Drehachse. Auf diese Weise erreicht die bekannte Hebelanordnung, dass der Spreizkörper über eine V-förmige Hebelanordnung am darunterliegenden Abschnitt des anderen Scherenglieds abgestützt wird.A generic scissor lift table is from the DE 199 16 509 known, in which the scissor members, which are connected to each other at a common axis of rotation, are pivoted against each other by means of a spindle drive, which is between the legs of the scissor members, which are adjacent to the platform, and these can move towards each other. In this case, more uniform leverage forces over the stroke area, in particular in the lower position of the platform achieved in that the spreader is hinged to the first end of a lever whose second opposite end is guided on a guide track on the opposite lower leg of the other scissor member. The second end of this lever is also hinged to a second rocker arm, the other end is hinged to the upper leg of that scissor member on which the spreader 40 is guided, but in a region between spreader 40 and the common axis of rotation. In this way, the known lever arrangement that the Spreader is supported via a V-shaped lever assembly on the underlying portion of the other scissor member.

Abgabe der ErfindungDelivery of the invention

Es ist die Aufgabe der vorliegenden Erfindung, eine Anordnung für einen Scheren-Hubtisch bereitzustellen, mit dem eine noch gleichmäßigere Verteilung der Hubkräfte über den gesamten Hubbereich erreicht werden kann.It is the object of the present invention to provide an arrangement for a scissor lift table, with which an even more uniform distribution of the lifting forces over the entire stroke range can be achieved.

Genaue Beschreibung der ErfindungDetailed description of the invention

Die Erfindung nach Anspruch 1 wird nun mit Bezug auf die Figur näher beschrieben, in denen

  • Figur 1 eine schematische Seitenansicht eines erfindungsgemäßen Scheren-Hubtisches mit einem Paar Scherenglieder und Spindelantrieb zeigt und
  • Figur 2 eine schematische Seitenansicht eines erfindungsgemäßen Scheren-Hubtisches mit einem Paar Scherenglieder und Hebegurt zeigt.
The invention according to claim 1 will now be described in more detail with reference to the figure, in which
  • FIG. 1 a schematic side view of a scissor lift table according to the invention with a pair of scissor members and spindle drive shows and
  • FIG. 2 a schematic side view of a scissor lift table according to the invention with a pair of scissor members and sling shows.

Erfmdungsgemäß ist vorgesehen, einen Scheren-Hubtisch mit mindestens einem Paar Scherenglieder 20, 30 und einer oberhalb davon angeordneten Plattform 1 auszustatten, bei dem das Paar Scherenglieder 20, 30 in einer gemeinsamen Drehachse 2 drehbar miteinander verbunden ist. Nachfolgend nimmt die Beschreibung Bezug auf ein Paar Scherenglieder, von denen jedoch vorzugsweise zwei parallel zueinander unterhalb der Plattform angeordnet sind und auch mehrere hintereinander angeordnet sein können, so dass jeweils ein Paar Scherenglieder mit seinen ersten Enden an den zweiten Enden eines weiteren Paars Scherenglieder angelenkt ist.According to the invention, it is provided to equip a scissor lift table with at least one pair of scissor members 20, 30 and a platform 1 arranged above it, in which the pair of scissor members 20, 30 is connected to one another rotatably in a common axis of rotation 2. In the following, the description refers to a pair of scissor members, but preferably two of which are arranged parallel to each other below the platform and several can be arranged behind each other, so that in each case a pair of scissor members is articulated with its first ends to the second ends of a further pair of scissor members ,

Der obere Schenkel 21 des ersten Scherenglieds 20 sowie der obere Schenkel 31 des zweiten Scherenglieds 30 grenzen an die Plattform 1 an, der untere Schenkel 22 des ersten Scherenglieds 20 bzw. der untere Schenkel 32 des zweiten Scherenglieds 30 liegen den oberen Schenkeln 21 bzw. 31 gegenüber und werden durch die gemeinsame Drehachse 2 von diesen getrennt.The upper leg 21 of the first scissor member 20 and the upper leg 31 of the second scissor member 30 adjoin the platform 1, the lower leg 22 of the first scissor member 20 and the lower leg 32 of the second scissor member 30 are the upper legs 21 and 31st opposite and are separated by the common axis of rotation 2 of these.

Ein Spreizkörper 40 ist verschieblich auf einer ersten Führungsbahn angeordnet, welche sich am oberen Schenkel 31 befindet. Der Spreizkörper 40 ist antreibbar in Richtung auf den oberen Schenkel 21 beweglich. Der bewegliche Antrieb des Spreizkörpers 40 in Richtung auf den oberen Schenkel 21 kann durch einen bekannten Spindelantrieb mit Motor 42 und Spindel 41 realisiert werden, der zwischen dem oberen Schenkel 21 und dem Spreizkörper 40 angeordnet ist, um den Abstand zwischen Spreizkörper 40 und dem Angriffspunkt 23 des Spindelantriebs am oberen Schenkel 21 zu verändern. Der Angriffspunkt 23 am oberen Schenkel 21 kann als eine schwenkbare Lagerung ausgeführt sein. Bei dieser Ausführungsform ist vorzugsweise die Spindelmutter im Spreizkörper 40 enthalten, in der die Spindel 41 drehbar gelagert ist.An expansion body 40 is arranged displaceably on a first guide track, which is located on the upper leg 31. The expansion body 40 is drivable in the direction of the upper leg 21 movable. The movable drive of the expansion body 40 in the direction of the upper leg 21 can be realized by a known spindle drive with motor 42 and spindle 41 which is disposed between the upper leg 21 and the spreader 40 to the distance between spreader 40 and the point of application 23rd of the spindle drive on the upper leg 21 to change. The point of application 23 on the upper leg 21 can be designed as a pivotable mounting. In this embodiment, the spindle nut is preferably included in the expansion body 40, in which the spindle 41 is rotatably mounted.

Bei dieser ersten Ausführungsform des Antriebs, schematisch in Figur 1 dargestellt, bewegt ein Spindelantrieb den Spreizkörper 40 in Richtung auf den Angriffspunkt 23 zu oder von diesem weg, wobei der Angriffspunkt 23 im Bereich des oberen Schenkels 21 des Scherenglieds 20 angeordnet ist, oder mittelbar mit diesem gebunden ist, beispielsweise durch Befestigung an der Plattform, sodass beim Verschieben des Spreizkörpers 40 durch Rotation einer Spindel, die in einer Spindelmutter des Spreizkörpers 40 geführt ist, Spreizkörper 40 und Angriffspunkt 23 aufeinander zu oder voneinander weg bewegt werden können.In this first embodiment of the drive, shown schematically in FIG FIG. 1 a spindle drive moves the expansion body 40 toward or away from the point of application 23, the point of application 23 being arranged in the region of the upper leg 21 of the scissor member 20 or being indirectly connected thereto, for example by attachment to the platform, so that when moving the spreader 40 by rotation of a spindle which is guided in a spindle nut of the spreader 40, spreader 40 and point 23 can be moved toward or away from each other.

In einer alternativen Ausführungsform wird ist der Spreizkörper 40 durch mindestens einen Gurtantrieb in Richtung auf den Angriffspunkt 23 antreibbar beweglich.In an alternative embodiment, the spreader 40 is drivable by at least one belt drive in the direction of the point of application 23 drivable.

Ein solcher Gurtantrieb, schematisch in Figur 2 dargestellt, ist durch einen Motorantrieb gesteuert verkürzbar und verlängerbar, beispielsweise durch ein motorgetriebenes Schneckengetriebe das steuerbar ist, um den Gurt mittels angetriebener Rollen auf oder abzuwickeln. In dieser Ausführungsform ist es wesentlich, dass die Länge des Gurts 43 zwischen Spreizkörper 40 und Angriffspunkt 23 gesteuert verkürzt bzw. verlängert werden kann, dabei kann der Motorantrieb zwischen Angriffspunkt 23 und Spreizkörper 40 angeordnet sein, oder der Gurt kann über eine erste Umlenkrolle 44, die im Angriffspunkt 23 angeordnet ist, und eine zweite Umlenkrolle 45, die im Bereich der gemeinsamen Drehachse 2 angeordnet ist, umgelenkt werden und durch einen Motorantrieb verkürzbar und verlängerbar sein, der auf dem unteren Schenkel 32 angeordnet ist. Bei der letzteren Anordnung des Gurts 43 tritt eine weitere Unterstützung der Spreizung der Scherenglieder dadurch ein, dass die zweite Umlenkrolle 45 in einem Abstand von der gemeinsamen Drehachse entweder dem oberen Schenkel 21 oder dem unteren Schenkel 32 oder jeweils eine Umlenkrolle 45 und 45' auf beiden dieser Schenkel 21 und 32 angeordnet ist.Such a belt drive, schematically in FIG. 2 is controlled by a motor drive shortened and extendable, for example, by a motor-driven worm gear that is controllable to the belt by means of driven rollers on or unwind. In this embodiment, it is essential that the length of the belt 43 controlled between spreader 40 and point 23 can be shortened or extended, while the motor drive between point 23 and spreader 40 may be arranged, or the belt may be connected via a first guide roller 44, which is arranged in the point of application 23, and a second deflection roller 45, which is arranged in the region of the common axis of rotation 2, to be deflected and be shortened and extendable by a motor drive, which is arranged on the lower leg 32. In the latter arrangement of the belt 43 occurs further support the spreading of the scissor members in that the second guide roller 45 at a distance from the common Rotary axis either the upper leg 21 or the lower leg 32 or a respective deflection roller 45 and 45 'on both of these legs 21 and 32 is arranged.

Erfmdungsgemäß ist vorgesehen, dass der Spreizkörper 40 an einem ersten Ende 51 eines ersten Hebels 50 angelenkt ist, wobei das zweite Ende 52 dieses ersten Hebels 50 an einem ersten Ende 61 eines zweiten Hebels 60 angelenkt ist. Das zweite Ende 62 des zweiten Hebels 60 ist verschieblich auf einer zweiten Führungsbahn 34 geführt, die am unteren Schenkel 32 des zweiten Scherenglieds 30 angeordnet ist. Die zweite Führungsbahn 34 ist oberhalb des zweiten Endes 62 angeordnet, d.h. zwischen zweitem Ende 62 und Plattform 1, so dass das zweite Ende 62 von unten gegen die zweite Führungsbahn 34 läuft. Der zweite Hebel 60 ist schwenkbar am unteren Schenkel 22 in seinem Schwenkpunkt 63 gelagert. Dieser Schwenkpunkt 63 ist zwischen erstem Ende 61 und zweitem Ende 62 des zweiten Hebels 60 angeordnet.According to the invention, it is provided that the expansion body 40 is articulated at a first end 51 of a first lever 50, the second end 52 of this first lever 50 being articulated at a first end 61 of a second lever 60. The second end 62 of the second lever 60 is slidably guided on a second guide track 34 which is arranged on the lower leg 32 of the second scissor member 30. The second guideway 34 is located above the second end 62, i. between the second end 62 and platform 1, so that the second end 62 runs from below against the second guide track 34. The second lever 60 is pivotally mounted on the lower leg 22 in its pivot point 63. This pivot point 63 is disposed between the first end 61 and the second end 62 of the second lever 60.

Das Zusammenwirken des ersten Hebels 50, der zwischen Spreizkörper 40 und zweitem Hebel 60 angeordnet ist, wobei der Hebel 60 am unteren Schenkel 22 im Schwenkpunkt 63 angelenkt ist, führt dazu, dass die beim Heben oder Senken der Plattform 1 erforderlichen Kräfte, die zwischen Spreizkörper 40 und Angriffspunkt 23 aufzuwenden sind, verringert werden und über den gesamten Schwenkbereich etwa gleich groß sind. Diese gleichmäßigen Kräfteverhältnisse zwischen offenem und geschlossenem Zustand der Scherenglieder 20 und 30 bei angehobener bzw. abgesenkter Plattform 1 ergeben sich bei dem erfindungsgemäßen Scheren-Hubtisch daraus, dass der zweite Schwenkarm 60 als zusätzlicher Hebel zwischen der zweiten Führungsbahn auf dem unteren Schenkel 32 und dem ersten Hebel 50 um seinen Schwenkpunkt 63 wirkt, sodass der erste Hebel 50 den Spreizkörper 40 dabei unterstützt, die oberen Schenkel aufeinander zuzubewegen, wenn eine Kraft zwischen Spreizkörper 40 und Angriffspunkt 23 wirkt und diese aufeinander zu bewegt.The interaction of the first lever 50, which is arranged between spreader 40 and second lever 60, wherein the lever 60 is articulated on the lower leg 22 in the pivot point 63, causes the forces required when lifting or lowering the platform 1, the forces between spreader 40 and attack point 23 are to be reduced and are about the same size over the entire pivoting range. This uniform force relationships between open and closed state of the scissor members 20 and 30 with raised or lowered platform 1 result in the inventive scissor lift table from the fact that the second pivot arm 60 as an additional lever between the second guide track on the lower leg 32 and the first Lever 50 acts around its pivot point 63, so that the first lever 50 supports the expansion body 40 to move the upper leg toward each other when a force between spreader 40 and point 23 acts and these moves toward each other.

In einer bevorzugten Ausführungsform ist die erste Führungsbahn 33 in ihrem oberen Abschnitt 33A, der in Richtung des oberen Schenkels 31 angeordnet ist, in Form einer nach oben in Richtung auf die Plattform gebogenen Kurve gestaltet, während ihr unterer Abschnitt 33B, der in Richtung auf die gemeinsame Drehachse 2 weist, etwa gradlinig parallel oder in einem flachen Winkel geneigt zum oberen Schenkel 31 gestaltet ist.In a preferred embodiment, the first guide track 33 is designed in its upper portion 33A, which is arranged in the direction of the upper leg 31, in the form of a curved upward curve in the direction of the platform, while its lower portion 33B, which in the direction of the has common axis of rotation 2, approximately in a straight line parallel or at a shallow angle inclined to the upper leg 31 is designed.

Die zweite Führungsbahn 34 auf dem unteren Schenkel 32 kann annähernd gradlinig, in etwa parallel zum unteren Schenkel 32 oder in einem leichten Winkel dazu ausgeführt sein. Es ist jedoch eine Ausgestaltung bevorzugt, in der die zweite Führungsbahn 34 in Form einer Kurvensteuerung in einem oberen Abschnitt 34A, der in Richtung auf die gemeinsame Drehachse 2 weist, einen zur Plattform 1 gerichteten bogenförmigen Verlauf aufweist, der zur Unterseite, d.h. zu der der Plattform 1 abgewandten Seite des unteren Schenkels 32 offen und konkav ist und das zweite Ende 62 des zweiten Hebels 60 verschieblich aufnimmt, während ein angrenzender unterer Abschnitt 34B der zweiten Führungsbahn 34 in der von der gemeinsamen Drehachse 2 abgewandten Richtung annähernd parallel zum unteren Schenkel 32 linear gestaltet sein kann oder einen bogenförmigen Verlauf aufweisen kann, der sich zur Unterseite hin leicht konvex wölbt.The second guide track 34 on the lower leg 32 may be approximately straight, approximately parallel to the lower leg 32, or at a slight angle thereto. However, an embodiment is preferred in which the second guideway 34 in the form of a cam control in an upper portion 34A facing towards the common axis of rotation 2 has an arcuate course directed towards the platform 1 facing towards the bottom, i. to the side facing away from the platform 1 of the lower leg 32 is open and concave and the second end 62 of the second lever 60 slidably receives, while an adjacent lower portion 34 B of the second guide track 34 in the direction away from the common axis of rotation 2 approximately parallel to the lower Leg 32 may be linear or may have a curved course, which bulges slightly convex towards the bottom.

In diesen bevorzugten Ausführungsformen der zweiten Führungsbahn 34 als Kurvensteuerung wird ein besonders günstiges Hebelverhältnis insbesondere beim Anheben der Plattform aus der untersten Position ermöglicht, da das zweite Ende 62 des zweiten Schwenkhebels 60 im oberen Abschnitt 34A der zweiten Führungsbahn 34 verschieblich ist, sodass bei geringer Bewegung der oberen Schenkel 21 und 31 aufeinander zu im wesentlichen keine Lageveränderung des zweiten Endes 62 des zweiten Hebels 60 erfolgt. Daher kann der erste Hebel 50 in dieser Position die Bewegung des Spreizkörpers 40 besonders günstig auf der ersten Führungsbahn 33 lenken, während in einem weiter angehobenen Zustand der Plattform 1 das zweite Ende 62 des zweiten Hebels 60 in den unteren Abschnitt 34B der zweiten Führungsbahn 34 gelangt, sodass nun die Bewegung des unteren Schenkels 32 nach unten, d.h. entgegengesetzt der Plattform 1 dazu führt, dass dessen erstes Ende 61 nach oben, d.h. in Richtung der Plattform 1 verschwenkt wird, sodass der erste Hebel 50 diese Aufwärtsbewegung auf den Spreizkörper 40 weiter überträgt.In these preferred embodiments of the second guideway 34 as a cam control, a particularly favorable lever ratio is made possible in particular when lifting the platform from the lowermost position, since the second end 62 of the second pivot lever 60 in the upper portion 34A of the second guideway 34 is displaceable, so that with little movement the upper legs 21 and 31 to each other to substantially no change in position of the second end 62 of the second lever 60 takes place. Therefore, the first lever 50 in this position, the movement of the spreader 40 particularly favorable on the first guide track 33, while in a further raised state of the platform 1, the second end 62 of the second lever 60 in the lower portion 34 B of the second guide track 34 passes , so now the movement of the lower leg 32 down, ie opposite the platform 1 causes its first end 61 to move upwards, i. is pivoted in the direction of the platform 1, so that the first lever 50 transmits this upward movement on the spreader 40 on.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

  • Plattform 1Platform 1
  • Gemeinsame Drehachse 2Common axis of rotation 2
  • Erstes Scherenglied 20First scissor member 20
  • Oberes Ende 21 des ersten Scherenglieds 20Upper end 21 of the first scissor member 20
  • Unteres Ende 22 des ersten Scherenglieds 20Lower end 22 of the first scissor member 20
  • Angriffspunkt 23Point of attack 23
  • Zweites Scherenglied 30Second scissor member 30
  • Oberes Ende 31 des zweiten Scherenglieds 30Upper end 31 of the second scissor member 30
  • Unteres Ende 32 des zweiten Scherenglieds 30Lower end 32 of the second scissor member 30
  • Erste Führungsbahn 33First guideway 33
  • Oberer Abschnitt 33A der ersten Führungsbahn 33Upper portion 33A of the first guideway 33
  • Unterer Abschnitt 33B der ersten Führungsbahn 33Lower portion 33B of the first guideway 33
  • Zweite Führungsbahn 34Second guideway 34
  • Oberer Abschnitt 34A der zweiten Führungsbahn 34Upper portion 34A of the second guideway 34
  • Unterer Abschnitt 34B der zweiten Führungsbahn 34Lower portion 34B of the second guideway 34
  • Spreizkörper 40Spreader 40
  • Spindel 41Spindle 41
  • Motor 42Engine 42
  • Gurt 43Belt 43
  • Erste Umlenkrolle 44First guide roller 44
  • Zweite Umlenkrolle 45Second deflection roller 45
  • Erster Hebel 50First lever 50
  • Erstes Ende 51 des ersten Hebels 50First end 51 of the first lever 50
  • Zweites Ende 52 des ersten Hebels 50Second end 52 of the first lever 50
  • Zweiter Hebel 60Second lever 60
  • Erstes Ende 61 des zweiten Hebels 60First end 61 of the second lever 60
  • Zweites Ende 62 des zweiten Hebels 60Second end 62 of the second lever 60th
  • Schwenkpunkt 63Pivot point 63

Claims (8)

  1. Scissors lift having a platform (1), a first and a second lever (50, 60) and at least one pair of scissor elements (20, 30), a first scissor element (20) of which has an upper end (21) and a lower end (22), and the second scissor element (30) of which has an upper end (31), a lower end (32) and two guide tracks (33, 34), wherein the upper ends (21, 31) are in the vincinity of the platform (1), and the lower ends (22, 32) oppose the upper ends (21, 31), and wherein the first and the second scissor element (20, 30) are rotatable about a common rotating axis (2), and having a spreader body (40), which is guided along guide track (33), which is disposed on the upper end (31) of the second scissor element (30), wherein the spreader body (40) is drivably moveable into the direction of a working point (23), which is located on the upper end (21) of the first scissor element (20), characterized in that the spreader body (40) is articulated at a first end (51) of the first lever (50), and the second end (52) of the first lever (50) is articulated at the first end (61) of the second lever (60), the second end (62) of which is movably guided on the second guide track (34), which is positioned on the lower leg (32) of the second scissor element (30), wherein the second lever (60) is pivotable about a pivoting point (63), which is positioned on the lower leg (22) of the first scissor element (20).
  2. Scissors lift according to claim 1, characterized in that the second lever (60) is dimensioned such that its first end (61) at least in the state, in which the spreader body (40) and the working point (23) have their maximal distance to one another, from its pivoting point (63) does not extend further than the spreader body (40).
  3. Scissors lift according to claim 1 or 2, characterized in that the second guide track (34) has an upper section (34A), which is positioned in the direction of the common pivoting axis (2), and which has an arcuate course directed to the platform (1), which is open and concave to the side of the lower leg (32) opposite to platform (1), and a second section (34B), which is positioned in the direction opposite to the common rotating axis (2), which is formed approximately linearly and approximately parallel to the lower leg (32).
  4. Scissors lift according to claim 3, characterized in that the second section (34B) of the second guide track (34) as an arcuate course, which arches convexly into the direction of the lower side opposite to platform (1).
  5. Scissors lift according to one of the preceding claims, characterized in that the spreader body (40) is moveable against the lower side of the first guide track (33) opposite to platform (1), and into the direction of the working point (23) on the upper leg (21) of the first scissor element (20) by a spindle drive, which has a spindle nut in spreader body (40), a spindle (41) rotatable therein, and a motor (42) connected thereto.
  6. Scissors lift according to one of claims 1 to 4, characterized in that the spreader body (40) is moveable against the lower side of the first guide track (33) opposite to platform (1), and into the direction of the working point (23) on the upper leg (1) of the first scissor element (20) by a belt (43).
  7. Scissors lift according to claim 6, characterized in that the belt (43) is guided by a first deflection pulley (44) and a second deflection pulley (45), wherein the second deflection pulley (45) is arranged in a distance from the common rotating axis (2) on either the upper leg (21) or the lower leg (32), or one deflection pulley each (45 and 45') on both of these legs (21 and 32).
  8. Scissors lift according to one of claims 6 or 7, characterized in that the belt (43) can be lengthened or shortened by a motor drive in a controlled way.
EP05111340A 2004-11-25 2005-11-25 Height adjustable table with cross-legs Expired - Lifetime EP1661490B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004057055A DE102004057055A1 (en) 2004-11-25 2004-11-25 Scissor lift table

Publications (2)

Publication Number Publication Date
EP1661490A1 EP1661490A1 (en) 2006-05-31
EP1661490B1 true EP1661490B1 (en) 2010-06-16

Family

ID=35768633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05111340A Expired - Lifetime EP1661490B1 (en) 2004-11-25 2005-11-25 Height adjustable table with cross-legs

Country Status (3)

Country Link
EP (1) EP1661490B1 (en)
AT (1) ATE471092T1 (en)
DE (2) DE102004057055A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897049B1 (en) * 2006-02-09 2008-05-09 Mathieu Tep LIFT TABLE WITH ARTICULATED PIETEMENTS.
US8967057B2 (en) 2012-11-02 2015-03-03 South Essex Fabricating Inc. Vertically adjustable platform system
WO2016126913A1 (en) * 2015-02-04 2016-08-11 Affinity Tool Works, Llc Collapsible mobile work bench and tool support stand
US9961989B2 (en) 2016-03-07 2018-05-08 Marc Stefan Witt Radial scissor lift table and method
CN119036411A (en) * 2024-08-02 2024-11-29 哈尔滨工业大学 Linear-driven multi-degree-of-freedom lifting platform

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4585212A (en) * 1984-12-07 1986-04-29 International Business Machines Corporation Lift device of the scissor-jack type
DE3502641A1 (en) * 1985-01-26 1986-07-31 Mannesmann AG, 4000 Düsseldorf Scissor-type lifting appliance
US4858888A (en) * 1988-07-11 1989-08-22 Onelio Cruz Platform lifting mechanism
DE19526596B4 (en) * 1995-07-21 2004-12-16 Pro Hub Hebetechnik Gmbh Scissor
DK69898A (en) * 1998-05-20 1999-11-21 Hans Balle Christensen Lifting mechanism
DE19916509C1 (en) * 1999-04-13 2001-01-04 Langewellpott Eva Maria Scissor lift table with a platform for picking up objects to be lifted

Also Published As

Publication number Publication date
EP1661490A1 (en) 2006-05-31
DE102004057055A1 (en) 2006-06-01
ATE471092T1 (en) 2010-07-15
DE502005009750D1 (en) 2010-07-29

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