EP0724540A1 - Scissor-action lifting table - Google Patents

Scissor-action lifting table

Info

Publication number
EP0724540A1
EP0724540A1 EP94930972A EP94930972A EP0724540A1 EP 0724540 A1 EP0724540 A1 EP 0724540A1 EP 94930972 A EP94930972 A EP 94930972A EP 94930972 A EP94930972 A EP 94930972A EP 0724540 A1 EP0724540 A1 EP 0724540A1
Authority
EP
European Patent Office
Prior art keywords
scissor
geared motor
elements
spindle
spindle nut
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.)
Granted
Application number
EP94930972A
Other languages
German (de)
French (fr)
Other versions
EP0724540B1 (en
Inventor
Ernst Langewellpott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Individual filed Critical Individual
Publication of EP0724540A1 publication Critical patent/EP0724540A1/en
Application granted granted Critical
Publication of EP0724540B1 publication Critical patent/EP0724540B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • B66F7/0608—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement driven by screw or spindle

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Machine Tool Units (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Knitting Machines (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Sewing Machines And Sewing (AREA)
  • Manipulator (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

PCT No. PCT/EP94/03486 Sec. 371 Date Apr. 29, 1996 Sec. 102(e) Date Apr. 29, 1996 PCT Filed Oct. 24, 1994 PCT Pub. No. WO95/11852 PCT Pub. Date May 4, 1995A scissor lift table includes a pivot element, a first scissor element and a second scissor element having respective first ends and respective second ends, the center portions of the scissor elements being operatively joined with one another at the pivot element such that the scissor elements are pivotable counter to one another about the pivot element. A table plate is supported by the pair of scissor elements and a base supports the pair of scissor elements and has a top side. A drive arrangement is operatively connected to the scissor elements for pivoting the scissor elements counter to one another. The drive arrangement includes a geared motor; a horizontal threaded spindle, the geared motor operatively engaging the spindle at the end portion thereof; and a spindle nut operatively engaging the spindle at the body portion thereof, wherein one of the geared motor and the spindle nut is mounted on the pivot element. The scissor lift table further includes a single pair of guide elements having: respective first ends pivotally connected to respective ones of the scissor elements from a region within only one lateral scissor angle defined between the scissor elements; and respective second ends both pivotably connected to one of the spindle nut and the geared motor.

Description

SCHERENHUBTISCH SCISSOR LIFT TABLE
Die Erfindung betrifft einen Scherenhubtisch mit einander im jeweiligen Mit¬ telbereich kreuzenden, gegeneinander schwenkbaren, eine Tischplatte tra- genden Scherengliedern, die jeweils an einem Ende fest, jedoch schwenkbar mit dem Boden einerseits und der Tischplatte andererseits verbunden sind und am anderen Ende verschiebbar gegen den Boden und die Unterseite der Tischplatte anliegen, mit einem Antrieb zum gegenseitigen Schwenken der Scherenglieder im Sinne einer Anhebung oder Absenkung der Tischplatte, der eine im wesentlichen waagerecht durch die Schwenkachse der Scheren¬ glieder verlaufende Gewindespindel umfaßt, die an einem Ende mit einem Getriebemotor antriebsverbunden ist und im anderen Endbereich mit Gewin¬ deeingriff eine Spindelmutter aufnimmt, und mit beidendig schwenkbaren Lenkern, die an dem Getriebemotor bzw. der Spindelmutter einerseits und jeweils einem der Scherenglieder andererseits gelagert sind.The invention relates to a scissor-type lifting table with scissor members crossing each other in the respective central region, pivotable against one another and carrying a table top, each of which is fixed at one end but pivotably connected to the floor on the one hand and the table top on the other and is displaceable at the other end The bottom and underside of the table top rest, with a drive for mutually pivoting the scissor links in the sense of raising or lowering the table top, which comprises a threaded spindle which runs essentially horizontally through the pivot axis of the scissor links and which is drive-connected at one end to a geared motor and accommodates a spindle nut in the other end region with thread engagement, and with links that can be pivoted at both ends, which are mounted on the gear motor or the spindle nut on the one hand and one of the scissor links on the other.
Ein derartiger Scherenhubtisch ist aus der DE-OS 41 06 371 bekannt. Der bekannte Scherenhubtisch arbeitet einwandfrei, ist jedoch im Hinblick auf die konstruktive Einfachheit verbesserungsfähig.Such a scissor lift table is known from DE-OS 41 06 371. The well-known scissor lift table works flawlessly, but it can be improved with regard to the structural simplicity.
Der Erfindung liegt die Aufgabe zugrunde, einen Scherenhubtisch der gat¬ tungsgemäßen Art zu schaffen, der bei relativ einfachem Aufbau einen mög¬ lichst großen Hub zwischen Mindesthöhe und Maximalhöhe bietet.The invention has for its object to provide a scissor lift table of the generic type which, with a relatively simple construction, offers the largest possible stroke between the minimum height and the maximum height.
Diese Aufgabe wird erfindungsgemäJ3 bei einem Scherenhubtisch der obigen Art dadurch gelöst, dajS der Getriebemotor oder die Spindelmutter in der Schwenkachse der Scherenglieder schwenkbar festgelegt ist und daj3 die Spindelmutter oder der Getriebemotor von einem der seitlichen Scheren¬ winkel aus über jeweils einen beidendig schwenkbaren Lenker mit jeweils ei- nem der Scherenglieder verbunden ist.This object is achieved according to the invention in a scissor lift table of the above type in that the gear motor or the spindle nut is pivotally fixed in the pivot axis of the scissor members and in that the spindle nut or the gear motor is pivoted from one of the lateral scissor angles, in each case via a handlebar which can be pivoted at both ends one of the scissor links is connected.
Im Gegensatz zu der bekannten Lösung reichen somit nur zwei beidendig schwenkbare Lenker aus, da der Spindelantrieb in der Schwenkachse der Scherenglieder festgelegt ist.In contrast to the known solution, only two pivotable handlebars are sufficient, since the spindle drive is fixed in the pivot axis of the scissor links.
Die Festlegung in der Schwenkachse kann sowohl auf der Seite des Getriebe¬ motors als auch bei der Spindelmutter erfolgen. Im folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand der beigefügten Zeichnung näher erläutert.The definition in the swivel axis can take place both on the side of the geared motor and on the spindle nut. Preferred exemplary embodiments of the invention are explained in more detail below with reference to the attached drawing.
Fig. 1 bis 3 zeigen drei Varianten einer ersten Ausführungsform der Erfindung;1 to 3 show three variants of a first embodiment of the invention;
Fig. 4 und 5 zeigen zwei Varianten einer zweiten Ausführungsform der Erfindung.4 and 5 show two variants of a second embodiment of the invention.
In Fig. 1 ist schematisch ein Scherenhubtisch dargestellt, der eine obere Tischplatte 10 und eine untere Bodenplatte 12 umfaßt. Die Tischplatte und die Bodenplatte müssen nicht geschlossene Platten sein. Vielmehr kann es sich um geeignete Rahmen- oder Gestellkonstruktionen handeln.In Fig. 1, a scissor lift table is schematically shown, which comprises an upper table top 10 and a lower base plate 12. The table top and the base plate do not have to be closed tops. Rather, it can be a suitable frame or frame construction.
Auf der linken Seite in Fig. 1 befinden sich an der Unterseite der Tischplatte 10 und an der Oberseite der Bodenplatte 12 fest angebrachte Gelenke 14, 16, in denen zwei einander kreuzende Scherenglieder 18,20 schwenkbar gela¬ gert sind. Das an der Bodenplatte schwenkbar befestigte Scherenglied 18 er¬ streckt sich schräg aufwärts bis unter die Tischplatte 10, an der es durch ei- ne drehbare Laufrolle 22 abgestützt ist. Andererseits verläuft das andere Scherenglied 20 von dem Gelenk 14 abwärts bis zur Bodenplatte, auf der es sich über eine Laufrolle 24 abstützt. Im Kreuzungspunkt der beiden Scheren¬ glieder 18,20 sind diese durch eine Schwenkachse 26 verbunden.On the left side in FIG. 1 there are fixed joints 14, 16 on the underside of the table top 10 and on the top of the base plate 12, in which two intersecting scissor members 18, 20 are pivotally mounted. The scissor member 18 pivotally attached to the base plate extends obliquely upwards to below the table top 10, on which it is supported by a rotatable roller 22. On the other hand, the other scissor link 20 runs downwards from the joint 14 to the base plate, on which it is supported by a roller 24. At the intersection of the two scissor members 18, 20 they are connected by a pivot axis 26.
In der Schwenkachse 26 ist zugleich ein Gehäuse 28 eines Getriebemotors 30 schwenkbar festgelegt, aus dem nach links in Fig. 1 eine Gewindespindel 32 austritt, die eine Spindelmutter 34 aufnimmt. Bei Drehung der Gewinde¬ spindel 32 mit Hilfe des Getriebemotors 30 wird die Spindelmutter 34 nach links bzw. rechts in Fig. 1 verschoben.In the pivot axis 26, a housing 28 of a geared motor 30 is at the same time pivotally fixed, from which a threaded spindle 32 emerges to the left in FIG. 1, which receives a spindle nut 34. When the threaded spindle 32 is rotated with the aid of the geared motor 30, the spindle nut 34 is shifted to the left or right in FIG. 1.
Auf der Spindelmutter 34 befinden sich in Fig. 1 eine obere und eine untere Schwenkachse 36,38, in denen Lenker 40,42 schwenkbar gelagert sind, die an ihren anderen Enden über Schwenkachsen 44,46 mit den beiden links der Schwenkachse 26 in Fig. 1 liegenden Abschnitten der Scherenglieder 18,20 verbunden sind. Es ist ersichtlich, daß die Scherenglieder 18,20 bei einer Verschiebung de Spindelmutter 34 nach rechts in Fig. 1 mit Hilfe der Lenker 40,42 aufgerich¬ tet und bei entgegengesetzter Verschiebung der Spindelmutter 34 in eine flachere Stellung abgesenkt werden.On the spindle nut 34 there are in FIG. 1 an upper and a lower pivot axis 36, 38 in which links 40, 42 are pivotally mounted, which at their other ends via pivot axes 44, 46 with the two on the left of the pivot axis 26 in FIG. 1 lying sections of the scissor members 18, 20 are connected. It can be seen that the scissor members 18, 20 are erected when the spindle nut 34 is displaced to the right in FIG. 1 with the aid of the links 40, 42 and are lowered to a flatter position when the spindle nut 34 is displaced in the opposite direction.
Dies entspricht der Hebe- und Senkbewegung des Scherenhubtisch es.This corresponds to the lifting and lowering movement of the scissor lift table.
Es ist erkennbar, daß Fig. 1 nur eine schematische Darstellung ist. In der Praxis liegt in der Regel hinter der Zeichenebene in Fig. 1 ein weiteres Sche- rengliederpaar, und die Antriebseinrichtung befindet sich zwischen den bei¬ den Scherengliederpaaren.It can be seen that FIG. 1 is only a schematic illustration. In practice there is usually a further pair of scissor links behind the plane of the drawing in FIG. 1, and the drive device is located between the two pairs of scissor links.
Fig. 2 entspricht weitgehend Fig. 1 , so daß die selben Bezugsziffern für die entsprechenden Teile verwendet worden sind. Der einzige Unterschied ge- genüber Fig. 1 besteht darin, daß die beiden Schwenkachsen 36,38 auf der Spindelmutter 34 gemäß Fig. 1 zu einer einzigen Schwenkachse 48 zusam¬ mengefaßt sind. Daraus ergibt eine gewisse Verlängerung der beiden Lenker 40,42, die zu kinematisch günstigeren Verhältnissen führt.Fig. 2 largely corresponds to Fig. 1, so that the same reference numerals have been used for the corresponding parts. The only difference compared to FIG. 1 is that the two pivot axes 36, 38 on the spindle nut 34 according to FIG. 1 are combined to form a single pivot axis 48. This results in a certain lengthening of the two links 40, 42, which leads to more kinematically favorable conditions.
Eine weitere Verlängerung der Lenker 40,42 ergibt sich aus der Darstellung der Fig. 3, bei der die beiden Lenker 40,42 wiederum in den Schwenkachsen 36,38, jedoch in über Kreuz liegender Anordnung gelagert sind, so daß sich beispielsweise der zum oberen Scherengliedabschnitt führende Lenker 40 von der unteren Schwenkachse 38 der Spindelmutter 34 aus erstreckt.A further extension of the links 40, 42 results from the illustration in FIG. 3, in which the two links 40, 42 are in turn mounted in the pivot axes 36, 38, but in a crosswise arrangement, so that, for example, the top Scissor link section leading link 40 extends from the lower pivot axis 38 of the spindle nut 34.
Die in Fig. 1 bis 3 gezeigte Lösung erfordert nur zwei Lenker mit insgesamt vier Gelenken und einen relativ einfachen Antrieb mit kurzer Gewindespindel 32.The solution shown in FIGS. 1 to 3 requires only two links with a total of four joints and a relatively simple drive with a short threaded spindle 32.
Dies gilt auch für die Lösungen gemäß Fig. 4 und 5. In diesen Zeichnungen sind die selben Bezugsziffern für entsprechende Teile vorgesehen worden.This also applies to the solutions according to FIGS. 4 and 5. In these drawings, the same reference numbers have been provided for corresponding parts.
In Fig. 4 ist die Orientierung des Getriebemotors 30 und der Gewindespindel 32 gegenüber Fig. 1 bis 3 umgekehrt. Somit ist die Spindelmutter 34 schwenkbar in der Schwenkachse 26 der beiden Scherenglieder 18,20 fest¬ gelegt, während sich der Getriebemotor 32 auf der linken Seite in Fig. 4 be¬ findet. Im übrigen ergeben sich keine Unterschiede gegenüber den zuvor ge¬ schilderten Ausführungsformen. Fig. 5 entspricht wiederum vollständig Fig. 4, mit der Ausnahme, daß das Ge¬ häuse 28 des Getriebemotors 30 durch eine die Gewindespindel 32 umge¬ bende Hülse 50 verlängert ist, auf der sich in diesem Falle eine Schwenkach¬ se 52 befindet, in der die beiden Lenker 40,42 schwenkbar gelagert sind. Diese Lösung bietet die Möglichkeit, den Getriebemotor 30 seitlich außerhalb des Bereichs der Tischplatte 10 anzuordnen, so daß der Getriebemotor der vollständigen Absenkung der Tischplatte nicht entgegensteht. 4, the orientation of the geared motor 30 and the threaded spindle 32 is reversed compared to FIGS. 1 to 3. Thus, the spindle nut 34 is pivotally fixed in the pivot axis 26 of the two scissor members 18, 20, while the geared motor 32 is located on the left side in FIG. 4. Otherwise there are no differences compared to the previously described embodiments. FIG. 5 again corresponds completely to FIG. 4, with the exception that the housing 28 of the geared motor 30 is extended by a sleeve 50 surrounding the threaded spindle 32, on which in this case a swivel axis 52 is located the two links 40, 42 are pivotally mounted. This solution offers the possibility of arranging the geared motor 30 laterally outside the area of the table top 10, so that the geared motor does not prevent the table top from being completely lowered.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Scherenhubtisch mit einander im jeweiligen Mittelbereich kreuzenden, gegeneinander schwenkbaren, eine Tischplatte (10) tragenden Scherenglie- dern (18,20), die jeweils an einem Ende fest, jedoch schwenkbar mit dem Boden einerseits und der Unterseite der Tischplatte anderseits verbunden sind und am anderen Ende verschiebbar gegen den Boden und die Unterseite der Tischplatte anliegen, mit einem Antrieb zum gegenseitigen Schwenken der Scherenglieder im Sinne der Anhebung oder Absenkung der Tischplatte, der eine im wesentlichen waagerechte, durch die Schwenkachse (26) der Scherenglieder (18,20) verlaufende Gewindespindel (32) umfaßt, die an ei¬ nem Ende mit einem Getriebemotor (30) antriebsverbunden ist und im ande¬ ren Endbereich mit Gewindeeingriff eine Spindelmutter (34) aufnimmt, und mit beidendig schwenkbaren Lenkern (40,42), die an dem Getriebemotor (30) bzw. der Spindelmutter (34) einerseits und jeweils einem der Scheren¬ glieder ( 18,20) andererseits gelagert sind.1. scissor lifting table with scissor links (18, 20) crossing each other in the respective central region and pivoting against one another and carrying a table top (10), each of which is fixed at one end but pivotably connected to the bottom on the one hand and the underside of the table top on the other and at the other end slidably against the bottom and the underside of the table top, with a drive for mutual pivoting of the scissor links in the sense of raising or lowering the table top, which is a substantially horizontal through the pivot axis (26) of the scissor links (18, 20) extending threaded spindle (32) which is drive-connected at one end to a geared motor (30) and receives a spindle nut (34) in the other end region with thread engagement, and with both-sided pivotable links (40, 42) which on the Geared motor (30) or the spindle nut (34) on the one hand and one of the scissors members (18, 20) on the other.
2. Scherenhubtisch nach Anspruch 1 , dadurch gekennzeichnet, daß der Ge¬ triebemotor (30) schwenkbar in der Schwenkachse (26) der Scherenglieder (18,20) festgelegt ist.2. Scissor lift table according to claim 1, characterized in that the geared motor (30) is pivotally fixed in the pivot axis (26) of the scissor members (18, 20).
3. Scherenhubtisch nach Anspruch 1 , dadurch gekennzeichnet, daß die3. scissor lift table according to claim 1, characterized in that the
Spindelmutter (34) in der Schwenkachse (26) der Scherenglieder (18,20) festgelegt ist. Spindle nut (34) is fixed in the pivot axis (26) of the scissor members (18, 20).
EP94930972A 1993-10-27 1994-10-24 Scissor-action lifting table Expired - Lifetime EP0724540B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4336662 1993-10-27
DE4336662A DE4336662A1 (en) 1993-10-27 1993-10-27 Scissor lift table
PCT/EP1994/003486 WO1995011852A1 (en) 1993-10-27 1994-10-24 Scissor-action lifting table

Publications (2)

Publication Number Publication Date
EP0724540A1 true EP0724540A1 (en) 1996-08-07
EP0724540B1 EP0724540B1 (en) 1997-03-05

Family

ID=6501150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94930972A Expired - Lifetime EP0724540B1 (en) 1993-10-27 1994-10-24 Scissor-action lifting table

Country Status (7)

Country Link
US (1) US5694864A (en)
EP (1) EP0724540B1 (en)
JP (1) JPH09508882A (en)
AT (1) ATE149474T1 (en)
DE (2) DE4336662A1 (en)
ES (1) ES2102258T3 (en)
WO (1) WO1995011852A1 (en)

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* Cited by examiner, † Cited by third party
Title
See references of WO9511852A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342429A1 (en) 2002-03-07 2003-09-10 Transportes Continuos Interiores S.A. Scissor lifting table
EP1626028A1 (en) * 2004-08-11 2006-02-15 Transportes Continuos Interiores S.A. Power-operated scissor lift table

Also Published As

Publication number Publication date
ES2102258T3 (en) 1997-07-16
JPH09508882A (en) 1997-09-09
WO1995011852A1 (en) 1995-05-04
US5694864A (en) 1997-12-09
DE4336662A1 (en) 1995-05-04
ATE149474T1 (en) 1997-03-15
DE59401988D1 (en) 1997-04-10
EP0724540B1 (en) 1997-03-05

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