EP3973817B1 - Supporting device for a height-adjustable table frame - Google Patents

Supporting device for a height-adjustable table frame Download PDF

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Publication number
EP3973817B1
EP3973817B1 EP21175115.1A EP21175115A EP3973817B1 EP 3973817 B1 EP3973817 B1 EP 3973817B1 EP 21175115 A EP21175115 A EP 21175115A EP 3973817 B1 EP3973817 B1 EP 3973817B1
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EP
European Patent Office
Prior art keywords
extension component
extension
supporting element
supporting
component
Prior art date
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Active
Application number
EP21175115.1A
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German (de)
French (fr)
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EP3973817A1 (en
Inventor
Philipp STIEFELMAIER
Michael Köder
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Kesseboehmer Holding OHG
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Kesseboehmer Holding OHG
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Publication of EP3973817A1 publication Critical patent/EP3973817A1/en
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Classifications

    • 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
    • A47B9/12—Tables with tops of variable height with flexible height-adjusting means, e.g. rope, chain
    • 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
    • A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder
    • 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
    • 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
    • A47B13/00—Details of tables or desks
    • A47B13/02—Underframes
    • 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
    • A47B13/00—Details of tables or desks
    • A47B13/08—Table tops; Rims therefor
    • 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
    • A47B9/02—Tables with tops of variable height with balancing device, e.g. by springs, by weight
    • 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
    • A47B2200/00—General construction of tables or desks
    • A47B2200/0035—Tables or desks with features relating to adjustability or folding
    • A47B2200/005—Leg adjustment
    • 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
    • A47B9/20—Telescopic guides

Definitions

  • the invention relates to a support device for a height-adjustable table, in particular for a height-adjustable table with several support elements.
  • Height-adjustable tables are known in the prior art which have several height-adjustable table legs, which are also referred to below as support elements, in order to be able to safely and reliably carry and lift loads placed on a table top of the height-adjustable table.
  • the problem here is that components of the height-adjustable table legs can become tilted and thus jammed if the table legs do not move synchronously.
  • WO 2008/145399 A1 discloses a height-adjustable column, in particular for tables, which has three extension components.
  • a first extension component, a second extension component and a third extension component are coupled to one another in such a way that when the length of the column changes, a displacement of the second extension component relative to the first extension component in a direction parallel to the length change synchronously causes a displacement of the third extension component relative to the second extension component in the same direction.
  • document EP 1 987 734 B1 shows a synchronization device with a cable-type synchronization element which is fastened at one end to one of the extension components of a first support element and at the other end to the same extension component of a second support element, and with two deflection rollers, each of which is fastened to a different one of the extension components of the first support element and the second support element, wherein a deflection of the cable-type synchronization element takes place by means of the deflection rollers in such a way that a first relative displacement between the extension components of the first support element results in a synchronous relative displacement between the two extension components of the second support element.
  • the invention is based on the object of eliminating the above problems and providing a support device for a height-adjustable table which enables reliable functioning of the height-adjustable table over an entire adjustment range for an ergonomic working height of the table top.
  • a support device for a height-adjustable table has a first support element and at least one second support element, wherein the first support element and the at least one second support element each have a first extension component, a second extension component and a third extension component.
  • the first extension component, the second extension component and the third extension component are arranged so as to be displaceable relative to one another in order to bring about a change in the length of the first support element and the at least one second support element.
  • the second extension component is arranged in a direction of the change in length between the first extension component and the third extension component, and the first extension component, the second extension component and the third extension component are coupled to one another in such a way that, when the length of the first support element and the at least one second support element changes, a displacement of the second extension component relative to the first extension component in a direction parallel to the change in length synchronously causes a displacement of the third extension component relative to the second extension component in the same direction.
  • the support device further comprises a synchronization device which is designed to synchronize the displacement of the second extension component to the first extension component or the displacement of the third extension component to the second extension component between the first support element and the at least one second support element.
  • the defined movement of the individual extension components relative to one another makes it possible to absorb bending moments applied to the support elements, which arise, for example, from resting on the edge of a table top during height adjustment or from large eccentrically placed loads on the table top, without excessive loads being placed on the guides or sliding pieces, which are intended to enable the extension components to move into one another with as little play as possible.
  • This defined movement is carried out in a synchronized manner so that the multiple support elements cannot become jammed.
  • an extent of the displacement between the second cantilever component and the first cantilever component and an extent of the displacement between the third cantilever component and the second cantilever component are identical.
  • the support device has an endless cable-like element and two third deflection rollers, which are arranged at a distance in the direction of the change in length of the first support element and the at least one second support element and are connected to the second extension component, wherein the endless cable-like element is designed such that it is deflected without play by the two third deflection rollers and a section of the endless cable-like element in the direction of the change in length of the first support element and the at least one second support element between the two third deflection rollers is connected to the first extension component and the third extension component.
  • the cable-like element is a steel band.
  • the design with a small diameter is possible, which also enables the use of deflection rollers with small dimensions, thus saving installation space
  • due to the slight stretching of the steel band a precisely defined movement of the individual design components relative to each other is possible.
  • the third deflection rollers have a crown on their running surface along their axis of rotation.
  • the steel belt Due to the crowning, namely a bulge of the running surface towards the centre of the running surface, the steel belt is self-centred as it runs, so that reliable operation is possible without additional centre-holding devices.
  • the synchronization device has a first cable-type synchronization element, which is fastened at one end to one of the extension components of the first support element and at the other end to the same of the extension components of the at least one second support element, and first deflection rollers, each of which is fastened to a different one of the extension components of the first support element and the at least one second support element, wherein the other of the extension components of the first support element and the at least one second support element is the same extension component, and a deflection of the first cable-type synchronization element takes place by means of the first deflection rollers in such a way that a first relative displacement between two of the extension components of the first support element results in a synchronous relative displacement between the two identical extension components of the at least one second support element.
  • This arrangement makes it easy to realize the relative displacement between two identical cantilever components between the two support elements.
  • the synchronization device has a second cable-type synchronization element, which is fastened at one end to one of the extension components of the first support element and at the other end to the same of the extension components of the at least second support element, and second deflection rollers, which are each fastened to the other of the extension components of the first support element and the at least second Support element are attached, wherein the other of the extension components of the first support element and of the at least one second support element is in each case the same extension component.
  • a deflection of the second cable-type synchronization element by means of the second deflection rollers takes place in such a way that an opposite relative displacement between two of the extension components of the first support element opposite to the first relative displacement in the first support element results in a synchronous opposite relative displacement between the two identical extension components of the at least one second support element.
  • This arrangement also makes it easy to realize the opposite relative displacement between two identical cantilever components between the two support elements.
  • the first and second cable-like elements are each a steel band.
  • the use of the steel band enables the use of pulleys with a small diameter and due to the low stretching of the steel band, a precisely defined synchronization of the relative movement between the first support element and the second support element is possible.
  • the first deflection rollers and second deflection rollers have a crown on their running surface along their axis of rotation.
  • the support device has a drive or support element which drives or supports the length changes of the first support element and the at least one second support element.
  • the table top can be adjusted with little or no muscle effort, especially when it is heavily loaded.
  • the drive or support element is a gas pressure spring.
  • the gas spring as the drive or support element has a small space requirement and can be provided cost-effectively.
  • the gas pressure spring is arranged in at least one of the first and the at least one second support element.
  • the gas pressure spring is provided between the first support element and the at least one second support element and is designed to apply a driving or supporting force to the cable-like synchronization element.
  • the drive or support element is designed to apply a drive or support force between the first cantilever component and the second cantilever component.
  • the drive or support element can be designed with a shorter travel path and thus with a required installation space with a shorter length, since the coupling of the first, second and third design components results in a greater change in length of the support elements than the change in length of the drive or support element.
  • a height-adjustable table is provided with a support device.
  • Fig.1 shows a schematic diagram of a height-adjustable table 1 according to the invention.
  • the height-adjustable table 1 has a table top 2 and a support device with a first support element 3 and a second support element 3'.
  • the support elements 3, 3' here form table legs in which a change in length L is possible in order to adjust the height of the table top 2.
  • the support elements 3, 3' are connected to one another by means of a cross brace 4 and fastened to the table top 2 at a suitable distance.
  • the support elements 3, 3' are individually fastened to the table top without having the cross brace 4.
  • more than two support elements 3, 3' are provided.
  • Fig. 1a shows an enlarged schematic diagram of the support element 3.
  • the support elements 3, 3' each have a first extension component 5, 5', a second extension component 6, 6' and a third extension component 7, 7'.
  • the first extension component 5, 5', the second extension component 6, 6' and the third extension component 7, 7' are arranged so as to be displaceable relative to one another in order to bring about the change in length L of the first support element 3 and the second support element 3'.
  • the second extension component 6, 6' is arranged in the direction of the change in length L between the first extension component 5, 5' and the third extension component 7, 7'.
  • the first extension component 5, 5' is connected to the table top 2.
  • the third extension component 7, 7' is connected to a table base (not shown) so that the height-adjustable table 1 can stand on a floor without tipping over.
  • the support device further comprises a drive or support element 17, 17' in each of the support elements 3, 3', which drives or supports the change in length L of the first support element 3 and the second support element 3'.
  • the support element 17, 17' supports, for example, human muscle power in adjusting the height of the table top in order to reduce the effort required.
  • the drive element on the other hand, carries out the height adjustment of the table top without human muscle power.
  • the drive or support element 17, 17' is a gas pressure spring.
  • a hydraulic cylinder or an electric motor-operated linear drive can be provided.
  • one of the drive or support elements 17, 17' is not provided for each of the support elements 3, 3', but only, for example, a single drive or support element 17, 17' for one of the support elements 3, 3'.
  • the gas pressure springs are arranged in the support elements 3, 3'. In alternative embodiments, the gas pressure springs are arranged outside the support elements 3, 3'.
  • the drive or support element 17, 17' is designed to apply a drive or support force between the first cantilever component 5, 5' and the second cantilever component 6, 6'. In an alternative embodiment, the drive or support element 17, 17' is designed to apply a drive or support force between the second cantilever component 6, 6' and the third cantilever component 7, 7'.
  • the support device further comprises a synchronization device which is designed to synchronize between the first support element 3 and the second support element 3', the displacement of the second extension component 6, 6' to the first extension component 5, 5' or the displacement of the third extension component 7, 7' to the second extension component 6, 6'.
  • the synchronization device has a first cable-type synchronization element 11, which is attached at one end to one of the extension components, in this embodiment to the second extension component 6, of the first support element 3, and at the other end to the same of the extension components, here also to the second extension component 6' of the second support element 3'.
  • the synchronization device also has two first deflection rollers 12, 13, each of which is attached to a different one of the extension components, in this embodiment to the first extension component 5, 5'.
  • a deflection of the first cable-type synchronization element 11 takes place by means of the two first deflection rollers 12, 13 in such a way that the relative displacement RV between two of the cantilever components, in this embodiment between the second cantilever component 6 and the first cantilever component 5, of the first support element 3 results in a synchronous relative displacement RV between the two identical cantilever components, in this embodiment between the second cantilever component 6' and the first cantilever component 5', of the second support element 3'.
  • first cable-type synchronization element 11 and the two first deflection rollers 12, 13 can also be attached to other extension components 5, 5', 6, 6', 7, 7' of the first support element 3 and the second support element 3', wherein it is essential that the two extension components 5, 5', 6, 6', 7, 7' are each different and the extension component 5, 5', 6, 6', 7, 7' on the first support element 3 and the second support element 3' is the same extension component 5, 5', 6, 6', 7, 7'.
  • the synchronization device further comprises a second cable-type synchronization element 14, which is attached at one end to one of the extension components, in this embodiment to the second extension component 6, of the first support element 3, and at the other end to the same of the extension components, here also to the second extension component 6' of the second support element 3'.
  • the synchronization device further comprises two second deflection rollers 15, 16, each of which is attached to a different one of the extension components, in this embodiment to the first extension component 5, 5'.
  • the second cable-type synchronization element 14 is deflected by means of the two second deflection rollers 15, 16 in such that an opposite relative displacement RV' between two of the cantilever components, in this embodiment between the third cantilever component 7 and the first cantilever component 5, of the first support element 3 results in an opposite relative displacement RV' between the two identical cantilever components, in this embodiment between the second cantilever component 6' and the first cantilever component 5', of the second support element 3'.
  • the second cable-type synchronization element 14 and the two second deflection rollers 15, 16 can also be attached to other extension components 5, 5', 6, 6', 7, 7' of the first support element 3 and the second support element 3', wherein it is essential that the two extension components 5, 5', 6, 6', 7, 7' of one of the support elements 3, 3' are each different and the extension component 5, 5', 6, 6', 7, 7' on the first support element 3 and the second support element 3' is the same extension component 5, 5', 6, 6', 7, 7'.
  • the first cable-type synchronization element 11 and the second cable-type synchronization element 14 are each designed as a steel band. In alternative embodiments, the first cable-type synchronization element 11 and the second cable-type synchronization element 14 can also be designed, for example, as a plastic band or a steel cable.
  • Fig.2 shows a schematic diagram of one of the support elements 3 with a coupling device of the first extension component 5, the second extension component 6 and the third extension component 7.
  • the first extension component 5, the second extension component 6 and the third extension component 7 are coupled to one another in such a way that, when the length L of the first support element 3 changes, a displacement of the second extension component 6 relative to the first extension component 5 in a direction parallel to the length change L synchronously causes a displacement of the third extension component 7 relative to the second extension component 6 in the same direction.
  • the second support element 3' has an identical coupling device.
  • the support device 3 has an endless cable-like element 8.
  • the support device 3 also has two third deflection rollers 9, 10, which are arranged at a distance in the direction of the length change L and are connected to the second extension component 6.
  • the endless cable-like element 8 is designed so that it is deflected without play by the two third deflection rollers 9, 10 and a section 8.1, 8.2 in the direction of the length change L between the two third deflection rollers 9, 10 is connected to the first extension component 5 and the third extension component 7.
  • the section 8.1 is connected to the first extension component 5 and the section 8.2 is connected to the third extension component 7.
  • An amount of displacement between the second cantilever member 6 and the first cantilever member 5 and an amount of displacement between the third cantilever member 7 and the second cantilever member 6 are identical in this embodiment.
  • the extent of the displacement between the second cantilever component 6, 6' and the first cantilever component 5, 5' and the extent of the displacement between the third cantilever component 7, 7' and the second cantilever component 6, 6' can be different.
  • the cable-like element 8 is designed as a steel band. In alternative embodiments, the cable-like element 8 can also be designed, for example, as a plastic band or a steel cable.
  • Fig.3 shows a cross-sectional view of one of the pulleys 9, 10, 12, 13, 14, 15.
  • the first, second and third deflection rollers 9, 10, 12, 13, 14, 15 have a crowning on their running surface along their axis of rotation, namely a bulge of the running surface towards the center of the running surface.
  • at least some of the first, second and third deflection rollers 9, 10, 12, 13, 14, 15 can also be provided with a straight running surface along their axis of rotation.
  • the gas pressure spring is provided between the first support element 3 and the second support element 3' and is designed to apply the driving or supporting force to the first or second cable-type synchronization element 11, 14.
  • the synchronization device is not provided with cable-type synchronization elements, but the synchronization takes place, for example, via an axis with a bevel gear on both sides and respective threaded spindles.

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Description

Die Erfindung betrifft eine Stützvorrichtung für einen höhenverstellbaren Tisch, insbesondere für einen höhenverstellbaren Tisch mit mehreren Stützelementen. Im Stand der Technik sind höhenverstellbare Tische bekannt, die, um Lasten, die auf einer Tischplatte des höhenverstellbaren Tisches aufgestellt sind, sicher und zuverlässig tragen und anheben zu können, mehrere höhenverstellbaren Tischbeine, die im Folgenden auch als Stützelemente bezeichnet werden, aufweisen. Dabei besteht das Problem, dass Bauteile der höhenverstellbaren Tischbeine verkanten und sich somit verklemmen können, wenn sich die Tischbeine nicht synchron bewegen.The invention relates to a support device for a height-adjustable table, in particular for a height-adjustable table with several support elements. Height-adjustable tables are known in the prior art which have several height-adjustable table legs, which are also referred to below as support elements, in order to be able to safely and reliably carry and lift loads placed on a table top of the height-adjustable table. The problem here is that components of the height-adjustable table legs can become tilted and thus jammed if the table legs do not move synchronously.

Ferner gibt es zwei Normen für Schreibtische, in denen sich eine minimal einstellbare Höhe der Arbeitsfläche und ein erforderlicher Hub unterscheiden. Die größere der Anforderungen der beiden Normen kann mit 2-teiligen Hubsäulen, insbesondere mit eingebauten Gasdruckfedern, nicht erfüllt werden, da die geforderte minimal einstellbare Höhe der Arbeitsfläche kleiner als das notwendige Einbaumaß für eine Gasfeder mit dem geforderten Mindesthub ist.There are also two standards for desks in which the minimum adjustable height of the work surface and the required stroke differ. The larger of the requirements of the two standards cannot be met with 2-part lifting columns, especially with built-in gas pressure springs, because the required minimum adjustable height of the work surface is smaller than the necessary installation dimension for a gas spring with the required minimum stroke.

Dazu offenbaren die Dokumente EP09 63 717 A2 , US 2015/0047538 A1 und EP 2 213 198 B1 jeweils ein bekanntes höhenverstellbares Tischsystem.The documents also reveal EP09 63 717 A2 , US 2015/0047538 A1 and EP 2 213 198 B1 each a well-known height-adjustable table system.

In Dokument WO 2008/145399 A1 ist eine höhenverstellbare Säule, insbesondere für Tische, offenbart, die drei Auslegebauteile aufweist. Ein erstes Auslegebauteil, ein zweites Auslegebauteil und ein drittes Auslegebauteil sind so miteinander gekoppelt, dass bei einer Längenänderung der Säule eine Verschiebung des zweiten Auslegebauteils zu dem ersten Auslegebauteil in einer Richtung parallel zu der Längenänderung synchron eine Verschiebung des dritten Auslegebauteil zu dem zweiten Auslegebauteil in der gleichen Richtung bewirkt.In document WO 2008/145399 A1 discloses a height-adjustable column, in particular for tables, which has three extension components. A first extension component, a second extension component and a third extension component are coupled to one another in such a way that when the length of the column changes, a displacement of the second extension component relative to the first extension component in a direction parallel to the length change synchronously causes a displacement of the third extension component relative to the second extension component in the same direction.

Dokument EP 1 987 734 B1 zeigt eine Synchronisationseinrichtung mit einem seilzugartigen Synchronisationselement, das an einem Ende an einem der Auslegebauteile eines ersten Stützelements befestigt ist und an dem anderen Ende an dem gleichen Auslegebauteil eines zweiten Stützelements befestigt ist, und mit zwei Umlenkrollen, die jeweils an einem anderen der Auslegebauteile des ersten Stützelements und des zweiten Stützelements befestigt sind, wobei eine Umlenkung des seilzugartigen Synchronisationselements mittels der Umlenkrollen in einer Art erfolgt, dass eine erste Relativverschiebung zwischen den Auslegebauteilen des ersten Stützelements eine synchrone Relativverschiebung zwischen den zwei Auslegebauteilen des zweiten Stützelements zur Folge hat.document EP 1 987 734 B1 shows a synchronization device with a cable-type synchronization element which is fastened at one end to one of the extension components of a first support element and at the other end to the same extension component of a second support element, and with two deflection rollers, each of which is fastened to a different one of the extension components of the first support element and the second support element, wherein a deflection of the cable-type synchronization element takes place by means of the deflection rollers in such a way that a first relative displacement between the extension components of the first support element results in a synchronous relative displacement between the two extension components of the second support element.

Der Erfindung liegt die Aufgabe zugrunde, die obigen Probleme auszuräumen und eine Stützvorrichtung für einen höhenverstellbaren Tisch bereitzustellen, die über einen gesamten Verstellbereich für eine ergonomische Arbeitshöhe der Tischplatte eine zuverlässige Funktion des höhenverstellbaren Tisches ermöglicht.The invention is based on the object of eliminating the above problems and providing a support device for a height-adjustable table which enables reliable functioning of the height-adjustable table over an entire adjustment range for an ergonomic working height of the table top.

Die Aufgabe wird durch eine Stützvorrichtung gemäß Anspruch 1 und einen höhenverstellbaren Tisch gemäß Anspruch 12 gelöst. Vorteilhafte Weiterentwicklungen der Erfindung sind in den abhängigen Ansprüchen enthalten.The object is achieved by a support device according to claim 1 and a height-adjustable table according to claim 12. Advantageous further developments of the invention are contained in the dependent claims.

Gemäß einem Aspekt der Erfindung weist eine Stützvorrichtung für einen höhenverstellbaren Tisch ein erstes Stützelement und mindestens ein zweites Stützelement auf, wobei das erste Stützelement und das mindestens eine zweite Stützelement jeweils ein erstes Auslegebauteil, ein zweites Auslegebauteil und ein drittes Auslegebauteil aufweisen. Das erste Auslegebauteil, das zweite Auslegebauteil und das dritte Auslegebauteil sind relativ zueinander verschiebbar angeordnet, um jeweils eine Längenänderung des ersten Stützelements und des mindestens einen zweiten Stützelements zu bewirken. Das zweite Auslegebauteil ist in einer Richtung der Längenänderung zwischen dem ersten Auslegebauteil und dem dritten Auslegebauteil angeordnet, und das erste Auslegebauteil, das zweite Auslegebauteil und das dritte Auslegebauteil sind so miteinander gekoppelt, dass, bei der Längenänderung des ersten Stützelements und des mindestens einen zweiten Stützelements, eine Verschiebung des zweiten Auslegebauteils zu dem ersten Auslegebauteil in einer Richtung parallel zu der Längenänderung synchron eine Verschiebung des dritten Auslegebauteil zu dem zweiten Auslegebauteil in der gleichen Richtung bewirkt wird. Die Stützvorrichtung weist ferner eine Synchronisationseinrichtung auf, die dazu ausgebildet ist, zwischen dem ersten Stützelement und dem mindestens einen zweiten Stützelement, die Verschiebung des zweiten Auslegebauteils zu dem ersten Auslegebauteil oder die Verschiebung des dritten Auslegebauteils zu dem zweiten Auslegebauteil zu synchronisieren.According to one aspect of the invention, a support device for a height-adjustable table has a first support element and at least one second support element, wherein the first support element and the at least one second support element each have a first extension component, a second extension component and a third extension component. The first extension component, the second extension component and the third extension component are arranged so as to be displaceable relative to one another in order to bring about a change in the length of the first support element and the at least one second support element. The second extension component is arranged in a direction of the change in length between the first extension component and the third extension component, and the first extension component, the second extension component and the third extension component are coupled to one another in such a way that, when the length of the first support element and the at least one second support element changes, a displacement of the second extension component relative to the first extension component in a direction parallel to the change in length synchronously causes a displacement of the third extension component relative to the second extension component in the same direction. The support device further comprises a synchronization device which is designed to synchronize the displacement of the second extension component to the first extension component or the displacement of the third extension component to the second extension component between the first support element and the at least one second support element.

Durch die definierte Bewegung der einzelnen Auslegebauteile zueinander wird ermöglicht, dass auf die Stützelemente aufgebrachte Biegemomente, die beispielsweise durch Aufstützen am Rand einer Tischplatte während einer Höhenverstellung oder durch größere exzentrisch aufgestellte Lasten auf der Tischplatte entstehen, aufgefangen werden können, ohne dass Führungen oder Gleitstücke, die ein möglichst spielfreies Ineinanderfahren der Auslegebauteile ermöglichen sollen, übermäßig belastet werden. Diese definierte Bewegung wird entsprechend synchronisiert ausgeführt, sodass ein Verkanten von den mehreren Stützelementen nicht auftreten kann.The defined movement of the individual extension components relative to one another makes it possible to absorb bending moments applied to the support elements, which arise, for example, from resting on the edge of a table top during height adjustment or from large eccentrically placed loads on the table top, without excessive loads being placed on the guides or sliding pieces, which are intended to enable the extension components to move into one another with as little play as possible. This defined movement is carried out in a synchronized manner so that the multiple support elements cannot become jammed.

In einer vorteilhaften Ausgestaltung der Stützvorrichtung sind ein Ausmaß der Verschiebung zwischen dem zweiten Auslegebauteil und dem ersten Auslegebauteil und ein Ausmaß der Verschiebung zwischen dem dritten Auslegebauteil und dem zweiten Auslegebauteil identisch.In an advantageous embodiment of the support device, an extent of the displacement between the second cantilever component and the first cantilever component and an extent of the displacement between the third cantilever component and the second cantilever component are identical.

Durch die identischen Verschiebungsausmaße zwischen dem zweiten Auslegebauteil und dem ersten Auslegebauteil und zwischen dem dritten Auslegebauteil und dem zweiten Auslegebauteil kann die Belastung auf die Führungen oder Gleitstücke minimiert werden.Due to the identical displacement amounts between the second cantilever component and the first cantilever component and between the third cantilever component and the second cantilever component, the load on the guides or sliding pieces can be minimized.

In einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung weist die Stützvorrichtung ein endloses seilzugartiges Element und zwei dritte Umlenkrollen, die in der Richtung der Längenänderung des ersten Stützelements und des mindestens einen zweiten Stützelements beabstandet angeordnet sind und mit dem zweiten Auslegebauteil verbunden sind, auf, wobei das endlose seilzugartige Element dazu ausgebildet ist, dass es durch die zwei dritten Umlenkrollen spielfrei umgelenkt wird und jeweils ein Abschnitt des endlosen seilzugartigen Elements in der Richtung der Längenänderung des ersten Stützelements und des mindestens einen zweiten Stützelements zwischen den zwei dritten Umlenkrollen mit dem ersten Auslegebauteil und dem dritten Auslegebauteil verbunden ist.In a further advantageous embodiment of the support device, the support device has an endless cable-like element and two third deflection rollers, which are arranged at a distance in the direction of the change in length of the first support element and the at least one second support element and are connected to the second extension component, wherein the endless cable-like element is designed such that it is deflected without play by the two third deflection rollers and a section of the endless cable-like element in the direction of the change in length of the first support element and the at least one second support element between the two third deflection rollers is connected to the first extension component and the third extension component.

Durch diese Anordnung können insbesondere die identischen Verschiebungsausmaße zwischen dem zweiten Auslegebauteil und dem ersten Auslegebauteil und zwischen dem dritten Auslegebauteil und dem zweiten Auslegebauteil einfach realisiert werden.By means of this arrangement, in particular, the identical displacement amounts between the second cantilever component and the first cantilever component and between the third cantilever component and the second cantilever component can be easily realized.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung ist das seilzugartige Element ein Stahlband.According to a further advantageous embodiment of the support device, the cable-like element is a steel band.

Durch die Verwendung des Stahlbandes mit einer hohen Zugfestigkeit ist die Auslegung mit einem geringen Durchmesser möglich, was auch eine Verwendung von Umlenkrollen mit geringen Abmessungen ermöglicht, sodass Bauraum eingespart werden kann. Außerdem ist aufgrund einer geringen Dehnung des Stahlbands eine genau definierte Bewegung der einzelnen Auslegebauteile zueinander möglich.By using the steel strip with a high tensile strength, the design with a small diameter is possible, which also enables the use of deflection rollers with small dimensions, thus saving installation space In addition, due to the slight stretching of the steel band, a precisely defined movement of the individual design components relative to each other is possible.

In einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung weisen die dritten Umlenkrollen entlang ihrer Drehachse eine Balligkeit an ihrer Lauffläche auf.In a further advantageous embodiment of the support device, the third deflection rollers have a crown on their running surface along their axis of rotation.

Durch die Balligkeit, nämlich eine Auswölbung der Lauffläche zu der Mitte der Lauffläche hin, erfolgt beim Lauf des Stahlbands eine Eigenzentrierung, sodass ein zuverlässiger Betrieb ohne zusätzliche Zentriereinrichtungen möglich ist.Due to the crowning, namely a bulge of the running surface towards the centre of the running surface, the steel belt is self-centred as it runs, so that reliable operation is possible without additional centre-holding devices.

Erfindungsgemäß weist die Synchronisationseinrichtung ein erstes seilzugartiges Synchronisationselement auf, das an einem Ende an einem der Auslegebauteile des ersten Stützelements befestigt ist und an dem anderen Ende an dem gleichen der Auslegebauteile des mindestens zweiten Stützelements befestigt ist, und erste Umlenkrollen, die jeweils an einem anderen der Auslegebauteile des ersten Stützelements und des mindestens zweiten Stützelements befestigt sind, wobei das andere der Auslegebauteile des ersten Stützelements und des mindestens einen zweiten Stützelements jeweils das gleiche Auslegebauteil ist, und eine Umlenkung des ersten seilzugartigen Synchronisationselements mittels der ersten Umlenkrollen in einer Art erfolgt, dass eine erste Relativverschiebung zwischen zwei der Auslegebauteile des ersten Stützelements eine synchrone Relativverschiebung zwischen den zwei gleichen Auslegebauteilen des mindestens einen zweiten Stützelements zur Folge hat.According to the invention, the synchronization device has a first cable-type synchronization element, which is fastened at one end to one of the extension components of the first support element and at the other end to the same of the extension components of the at least one second support element, and first deflection rollers, each of which is fastened to a different one of the extension components of the first support element and the at least one second support element, wherein the other of the extension components of the first support element and the at least one second support element is the same extension component, and a deflection of the first cable-type synchronization element takes place by means of the first deflection rollers in such a way that a first relative displacement between two of the extension components of the first support element results in a synchronous relative displacement between the two identical extension components of the at least one second support element.

Durch diese Anordnung kann die Relativverschiebung zwischen zwei gleichen Auslegebauteilen zwischen den zwei Stützelementen einfach realisiert werden.This arrangement makes it easy to realize the relative displacement between two identical cantilever components between the two support elements.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung weist die Synchronisationseinrichtung ein zweites seilzugartiges Synchronisationselement, das an einem Ende an einem der Auslegebauteile des ersten Stützelements befestigt ist und an dem anderen Ende an dem gleichen der Auslegebauteile des mindestens zweiten Stützelements befestigt ist, und zweite Umlenkrollen, die jeweils an dem anderen der Auslegebauteile des ersten Stützelements und des mindestens zweiten Stützelements befestigt sind, wobei das andere der Auslegebauteile des ersten Stützelements und des mindestens einen zweiten Stützelements jeweils das gleiche Auslegebauteil ist, auf. Eine Umlenkung des zweiten seilzugartigen Synchronisationselements mittels der zweiten Umlenkrollen erfolgt in einer Art, dass eine entgegengesetzte Relativverschiebung zwischen zwei der Auslegebauteile des ersten Stützelements entgegengesetzt zu der ersten Relativverschiebung in dem ersten Stützelement eine synchrone entgegengesetzte Relativverschiebung zwischen den zwei gleichen Auslegebauteilen des mindestens einen zweiten Stützelements zur Folge hat.According to a further advantageous embodiment of the support device, the synchronization device has a second cable-type synchronization element, which is fastened at one end to one of the extension components of the first support element and at the other end to the same of the extension components of the at least second support element, and second deflection rollers, which are each fastened to the other of the extension components of the first support element and the at least second Support element are attached, wherein the other of the extension components of the first support element and of the at least one second support element is in each case the same extension component. A deflection of the second cable-type synchronization element by means of the second deflection rollers takes place in such a way that an opposite relative displacement between two of the extension components of the first support element opposite to the first relative displacement in the first support element results in a synchronous opposite relative displacement between the two identical extension components of the at least one second support element.

Durch diese Anordnung kann auch die entgegengesetzte Relativverschiebung zwischen zwei gleichen Auslegebauteilen zwischen den zwei Stützelementen einfach realisiert werden.This arrangement also makes it easy to realize the opposite relative displacement between two identical cantilever components between the two support elements.

In einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung ist das erste und zweite seilzugartige Element jeweils ein Stahlband.In a further advantageous embodiment of the support device, the first and second cable-like elements are each a steel band.

Die Verwendung des Stahlbandes ermöglicht eine Verwendung von Umlenkrollen mit geringem Durchmesser und aufgrund einer geringen Dehnung des Stahlbands ist eine genau definierte Synchronisation der Relativbewegung zwischen dem ersten Stützelement und dem zweiten Stützelement zueinander möglich.The use of the steel band enables the use of pulleys with a small diameter and due to the low stretching of the steel band, a precisely defined synchronization of the relative movement between the first support element and the second support element is possible.

Bei einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung weisen die ersten Umlenkrollen und zweiten Umlenkrollen entlang ihrer Drehachse eine Balligkeit an ihrer Lauffläche auf.In a further advantageous embodiment of the support device, the first deflection rollers and second deflection rollers have a crown on their running surface along their axis of rotation.

Dadurch erfolgt beim Lauf des Stahlbands eine Eigenzentrierung, sodass ein zuverlässiger Betrieb ohne zusätzliche Zentriereinrichtungen möglich ist.This results in self-centering as the steel belt runs, enabling reliable operation without additional centering devices.

Erfindungsgemäß weist die Stützvorrichtung ein Antriebs- oder Unterstützungselement auf, das die Längenänderungen des ersten Stützelements und des mindestens einen zweiten Stützelements antreibt oder unterstützt.According to the invention, the support device has a drive or support element which drives or supports the length changes of the first support element and the at least one second support element.

Durch die Verwendung des Antriebs- oder Unterstützungselements kann die Tischplatte, insbesondere bei einer hohen Zuladung, ohne oder mit einem geringen Muskelkraftaufwand verstellt werden.By using the drive or support element, the table top can be adjusted with little or no muscle effort, especially when it is heavily loaded.

In einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung ist das Antriebs- oder Unterstützungselement eine Gasdruckfeder.In a further advantageous embodiment of the support device, the drive or support element is a gas pressure spring.

Die Gasdruckfeder als das Antriebs- oder Unterstützungselement hat einen geringen Platzbedarf und kann kostengünstig bereitgestellt werden.The gas spring as the drive or support element has a small space requirement and can be provided cost-effectively.

Bei einer weiteren vorteilhaften Ausgestaltung der Stützvorrichtung ist die Gasdruckfeder in mindestens einem von dem ersten und dem mindestens einen zweiten Stützelement angeordnet.In a further advantageous embodiment of the support device, the gas pressure spring is arranged in at least one of the first and the at least one second support element.

Durch die Koppelung der Auslegebauteile ist es möglich, eine Gasdruckfeder in dem Stützelement einzubauen, da die Hublänge der Gasdruckfedern geringer als die maximale Längenänderung des Stützelements sein kann. Dadurch hat die Gasdruckfeder in ihrem eingeschobenen Zustand eine Länge, die geringer als der zur Verfügung stehende Bauraum ist. Somit werden eine kompakte Bauform und ein geringerer gesamter Montageaufwand ermöglicht, da das Stützelement mit der Gasfeder bereits einfach vormontiert werden kann und somit ein Aufwand bei der Endmontage verringert wird.By coupling the design components, it is possible to install a gas pressure spring in the support element, as the stroke length of the gas pressure springs can be less than the maximum change in length of the support element. As a result, the length of the gas pressure spring in its retracted state is less than the available installation space. This enables a compact design and less overall assembly effort, as the support element can be easily pre-assembled with the gas spring, thus reducing the effort required for final assembly.

Gemäß einer anderen vorteilhaften Ausgestaltung der Stützvorrichtung ist die Gasdruckfeder zwischen dem ersten Stützelement und dem mindestens einen zweiten Stützelement vorgesehen und ist dazu ausgebildet, eine Antriebs- oder Unterstützungskraft auf das seilzugartige Synchronisationselement aufzubringen.According to another advantageous embodiment of the support device, the gas pressure spring is provided between the first support element and the at least one second support element and is designed to apply a driving or supporting force to the cable-like synchronization element.

Gemäß dieser Ausgestaltung ist es möglich, die Stützelemente mit einem geringeren Querschnitt zu versehen, da der Platzbedarf der Gasfeder in dem Stützelement entfällt, so dass gestalterische Anforderungen einfacher umgesetzt werden können.According to this design, it is possible to provide the support elements with a smaller cross-section, since the space required by the gas spring in the support element is eliminated, so that design requirements can be implemented more easily.

Gemäß der Erfindung ist das Antriebs- oder Unterstützungselement dazu ausgebildet, dass es eine Antriebs- oder Unterstützungskraft zwischen dem ersten Auslegebauteil und dem zweiten Auslegebauteil aufbringt.According to the invention, the drive or support element is designed to apply a drive or support force between the first cantilever component and the second cantilever component.

Durch ein solches Aufbringen der Antriebs- oder Unterstützungskraft kann das Antriebs- oder Unterstützungselement mit einem geringeren Verfahrweg und damit mit einem erforderlichen Bauraum mit einer geringeren Länge konzipiert werden, da sich durch die Koppelung des ersten, zweiten und dritten Auslegebauteils eine größere Längenänderung der Stützelemente als die Längenänderung des Antriebs- oder Unterstützungselement ergibt.By applying the drive or support force in this way, the drive or support element can be designed with a shorter travel path and thus with a required installation space with a shorter length, since the coupling of the first, second and third design components results in a greater change in length of the support elements than the change in length of the drive or support element.

Gemäß einem weiteren Aspekt der Erfindung ist ein höhenverstellbarer Tisch mit einer Stützvorrichtung versehen.According to a further aspect of the invention, a height-adjustable table is provided with a support device.

Bei einem solchen höhenverstellbaren Tisch wird ermöglicht, dass auf die Stützelemente aufgebrachte Biegemomente, beispielsweise durch Aufstützen am Rand einer Tischplatte während einer Höhenverstellung oder durch größere exzentrisch aufgestellte Lasten auf der Tischplatte, aufgefangen werden können, ohne dass Führungen oder Gleitstücke, die ein möglichst spielfreies Ineinanderfahren der Auslegebauteile ermöglichen, übermäßig belastet werden. Ferner wird die Bewegung zur Höhenverstellung synchronisiert ausgeführt, so dass ein Verkanten von den mehreren Stützelementen nicht auftreten kann.With such a height-adjustable table, it is possible to absorb bending moments applied to the support elements, for example by resting on the edge of a table top during height adjustment or by large eccentrically placed loads on the table top, without excessive loads being placed on the guides or sliding pieces, which enable the extension components to slide into one another with as little play as possible. Furthermore, the movement for height adjustment is carried out synchronously so that tilting of the multiple support elements cannot occur.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Zeichnungen erläutert.The invention is explained below using embodiments with reference to the accompanying drawings.

Insbesondere zeigt

Fig. 1
eine Prinzipdarstellung eines erfindungsgemäßen höhenverstellbaren Tisches;
Fig.
1a eine Prinzipdarstellung eines Stützelements eines erfindungsgemäßen höhenverstellbaren Tisches;
Fig. 2
eine Prinzipdarstellung eines Stützelements mit einer Kopplungseinrichtung eines ersten, zweiten und dritten Auslegebauteils; und
Fig. 3
eine Querschnittsansicht einer Umlenkrolle.
In particular,
Fig.1
a schematic diagram of a height-adjustable table according to the invention;
Fig.
1a a schematic diagram of a support element of a height-adjustable table according to the invention;
Fig.2
a schematic diagram of a support element with a coupling device of a first, second and third design component; and
Fig.3
a cross-sectional view of a pulley.

Fig. 1 zeigt eine Prinzipdarstellung eines erfindungsgemäßen höhenverstellbaren Tisches 1. Fig.1 shows a schematic diagram of a height-adjustable table 1 according to the invention.

Der höhenverstellbare Tisch 1 weist eine Tischplatte 2 sowie eine Stützvorrichtung mit einem ersten Stützelement 3 und einem zweiten Stützelement 3' auf. Die Stützelemente 3, 3' bilden hier Tischbeine, bei denen eine Längenänderung L möglich ist, um die Tischplatte 2 in ihrer Höhe zu verstellen. Die Stützelemente 3, 3' sind mittels einer Querstrebe 4 miteinander verbunden und in einem geeigneten Abstand an der Tischplatte 2 befestigt. In einer alternativen Ausführungsform sind die Stützelemente 3, 3' einzeln an der Tischplatte befestigt, ohne die Querstrebe 4 aufzuweisen. In weiteren alternativen Ausführungsformen sind mehr als zwei Stützelemente 3, 3' vorgesehen.The height-adjustable table 1 has a table top 2 and a support device with a first support element 3 and a second support element 3'. The support elements 3, 3' here form table legs in which a change in length L is possible in order to adjust the height of the table top 2. The support elements 3, 3' are connected to one another by means of a cross brace 4 and fastened to the table top 2 at a suitable distance. In an alternative embodiment, the support elements 3, 3' are individually fastened to the table top without having the cross brace 4. In further alternative embodiments, more than two support elements 3, 3' are provided.

Fig. 1a zeigt eine vergrößerte Prinzipdarstellung des Stützelements 3. Fig. 1a shows an enlarged schematic diagram of the support element 3.

Die Stützelemente 3, 3' weisen jeweils ein erstes Auslegebauteil 5, 5', ein zweites Auslegebauteil 6, 6' und ein drittes Auslegebauteil 7, 7' auf. Das erste Auslegebauteil 5, 5', das zweite Auslegebauteil 6, 6' und das dritte Auslegebauteil 7, 7' sind relativ zueinander verschiebbar angeordnet, um jeweils die Längenänderung L des ersten Stützelements 3 und des zweiten Stützelements 3' zu bewirken. Das zweite Auslegebauteil 6, 6' ist in Richtung der Längenänderung L zwischen dem ersten Auslegebauteil 5, 5' und dem dritten Auslegebauteil 7, 7' angeordnet. Das erste Auslegebauteil 5, 5' ist mit der Tischplatte 2 verbunden. Das dritte Auslegebauteil 7, 7' ist mit einem Tischfuß (nicht gezeigt) so verbunden, dass der höhenverstellbare Tisch 1 auf einem Boden stehen kann, ohne zu kippen.The support elements 3, 3' each have a first extension component 5, 5', a second extension component 6, 6' and a third extension component 7, 7'. The first extension component 5, 5', the second extension component 6, 6' and the third extension component 7, 7' are arranged so as to be displaceable relative to one another in order to bring about the change in length L of the first support element 3 and the second support element 3'. The second extension component 6, 6' is arranged in the direction of the change in length L between the first extension component 5, 5' and the third extension component 7, 7'. The first extension component 5, 5' is connected to the table top 2. The third extension component 7, 7' is connected to a table base (not shown) so that the height-adjustable table 1 can stand on a floor without tipping over.

Die Stützvorrichtung weist ferner in jedem der Stützelemente 3, 3' ein Antriebs- oder Unterstützungselement 17, 17' auf, das die Längenänderung L des ersten Stützelements 3 und des zweiten Stützelements 3' antreibt oder unterstützt. Das Unterstützungselement 17, 17' unterstützt beispielsweise eine menschliche Muskelkraft bei der Höhenverstellung der Tischplatte, um den Kraftaufwand zu reduzieren. Das Antriebselement führt die Höhenverstellung der Tischplatte hingegen ohne menschliche Muskelkraft aus.The support device further comprises a drive or support element 17, 17' in each of the support elements 3, 3', which drives or supports the change in length L of the first support element 3 and the second support element 3'. The support element 17, 17' supports, for example, human muscle power in adjusting the height of the table top in order to reduce the effort required. The drive element, on the other hand, carries out the height adjustment of the table top without human muscle power.

In dieser Ausführungsform ist das Antriebs- oder Unterstützungselement 17, 17' eine Gasdruckfeder. In alternativen Ausführungsformen kann beispielsweise ein Hydraulikzylinder oder ein elektromotorisch betriebener Linearantrieb vorgesehen sein. In weiteren alternativen Ausführungsformen ist nicht für jedes der Stützelemente 3, 3' eines der Antriebs- oder Unterstützungselemente 17, 17' vorgesehen, sondern lediglich beispielsweise ein einziges Antriebs- oder Unterstützungselement 17, 17' für eines der Stützelemente 3, 3'.In this embodiment, the drive or support element 17, 17' is a gas pressure spring. In alternative embodiments, for example, a hydraulic cylinder or an electric motor-operated linear drive can be provided. In further alternative embodiments, one of the drive or support elements 17, 17' is not provided for each of the support elements 3, 3', but only, for example, a single drive or support element 17, 17' for one of the support elements 3, 3'.

Die Gasdruckfedern sind in den Stützelementen 3, 3' angeordnet. In alternativen Ausführungsformen sind die Gasdruckfedern außerhalb der Stützelemente 3, 3', angeordnet.The gas pressure springs are arranged in the support elements 3, 3'. In alternative embodiments, the gas pressure springs are arranged outside the support elements 3, 3'.

Das Antriebs- oder Unterstützungselement 17, 17' ist dazu ausgebildet, dass es eine Antriebs- oder Unterstützungskraft zwischen dem ersten Auslegebauteil 5, 5' und dem zweiten Auslegebauteil 6, 6' aufbringt. In einer alternativen Ausführungsform ist das Antriebs- oder Unterstützungselement 17, 17' dazu ausgebildet, dass es eine Antriebs- oder Unterstützungskraft zwischen dem zweiten Auslegebauteil 6, 6' und dem dritten Auslegebauteil 7, 7' aufbringt.The drive or support element 17, 17' is designed to apply a drive or support force between the first cantilever component 5, 5' and the second cantilever component 6, 6'. In an alternative embodiment, the drive or support element 17, 17' is designed to apply a drive or support force between the second cantilever component 6, 6' and the third cantilever component 7, 7'.

Die Stützvorrichtung weist ferner eine Synchronisationseinrichtung auf, die dazu ausgebildet ist, zwischen dem ersten Stützelement 3 und dem zweiten Stützelement 3', die Verschiebung des zweiten Auslegebauteils 6, 6' zu dem ersten Auslegebauteil 5, 5' oder die Verschiebung des dritten Auslegebauteils 7, 7' zu dem zweiten Auslegebauteil 6, 6' zu synchronisieren.The support device further comprises a synchronization device which is designed to synchronize between the first support element 3 and the second support element 3', the displacement of the second extension component 6, 6' to the first extension component 5, 5' or the displacement of the third extension component 7, 7' to the second extension component 6, 6'.

Die Synchronisationseinrichtung weist ein erstes seilzugartiges Synchronisationselement 11 auf, das mit einem Ende an einem der Auslegebauteile, in dieser Ausführungsform an dem zweiten Auslegebauteil 6, des ersten Stützelements 3 befestigt ist und an dem anderen Ende an dem gleichen der Auslegebauteile, hier ebenfalls mit dem zweiten Auslegebauteil 6', des zweiten Stützelements 3' befestigt ist. Ferner weist die Synchronisationseinrichtung zwei erste Umlenkrollen 12, 13 auf, die jeweils an einem anderen der Auslegebauteile, in dieser Ausführungsform an dem ersten Auslegebauteil 5, 5', befestigt sind. Eine Umlenkung des ersten seilzugartigen Synchronisationselements 11 erfolgt mittels der zwei ersten Umlenkrollen 12, 13 in einer Art, dass die Relativverschiebung RV zwischen zwei der Auslegebauteile, in dieser Ausführungsform zwischen dem zweiten Auslegebauteil 6 und dem ersten Auslegebauteil 5, des ersten Stützelements 3 eine synchrone Relativverschiebung RV zwischen den zwei gleichen Auslegebauteilen, in dieser Ausführungsform zwischen dem zweiten Auslegebauteil 6' und dem ersten Auslegebauteil 5', des zweiten Stützelements 3' zur Folge hat.The synchronization device has a first cable-type synchronization element 11, which is attached at one end to one of the extension components, in this embodiment to the second extension component 6, of the first support element 3, and at the other end to the same of the extension components, here also to the second extension component 6' of the second support element 3'. The synchronization device also has two first deflection rollers 12, 13, each of which is attached to a different one of the extension components, in this embodiment to the first extension component 5, 5'. A deflection of the first cable-type synchronization element 11 takes place by means of the two first deflection rollers 12, 13 in such a way that the relative displacement RV between two of the cantilever components, in this embodiment between the second cantilever component 6 and the first cantilever component 5, of the first support element 3 results in a synchronous relative displacement RV between the two identical cantilever components, in this embodiment between the second cantilever component 6' and the first cantilever component 5', of the second support element 3'.

In alternativen Ausführungsformen können das erste seilzugartige Synchronisationselement 11 und die zwei ersten Umlenkrollen 12, 13 auch an anderen Auslegebauteil 5, 5', 6, 6', 7, 7' des ersten Stützelements 3 und des zweiten Stützelements 3' angebracht sein, wobei wesentlich ist, dass die beiden Auslegebauteile 5, 5', 6, 6', 7, 7' jeweils unterschiedlich sind und das Auslegebauteil 5, 5', 6, 6', 7, 7' an dem ersten Stützelement 3 und dem zweiten Stützelement 3' jeweils das gleiche Auslegebauteil 5, 5', 6, 6', 7, 7' ist.In alternative embodiments, the first cable-type synchronization element 11 and the two first deflection rollers 12, 13 can also be attached to other extension components 5, 5', 6, 6', 7, 7' of the first support element 3 and the second support element 3', wherein it is essential that the two extension components 5, 5', 6, 6', 7, 7' are each different and the extension component 5, 5', 6, 6', 7, 7' on the first support element 3 and the second support element 3' is the same extension component 5, 5', 6, 6', 7, 7'.

Die Synchronisationseinrichtung weist ferner ein zweites seilzugartiges Synchronisationselement 14 auf, das an einem Ende an einem der Auslegebauteile, in dieser Ausführungsform an dem zweiten Auslegebauteil 6, des ersten Stützelements 3 befestigt ist und an dem anderen Ende an dem gleichen der Auslegebauteile, hier ebenfalls an dem zweiten Auslegebauteil 6', des zweiten Stützelements 3' befestigt ist. Ferner weist die Synchronisationseinrichtung zwei zweite Umlenkrollen 15, 16 auf, die jeweils an einem anderen der Auslegebauteile, in dieser Ausführungsform an dem ersten Auslegebauteil 5,5', befestigt sind. Eine Umlenkung des zweiten seilzugartigen Synchronisationselements 14 erfolgt mittels der zwei zweiten Umlenkrollen 15, 16 in einer Art, dass eine entgegengesetzte Relativverschiebung RV' zwischen zwei der Auslegebauteile, in dieser Ausführungsform zwischen dem dritten Auslegebauteil 7 und dem ersten Auslegebauteil 5, des ersten Stützelements 3 eine entgegengesetzte Relativverschiebung RV' zwischen den zwei gleichen Auslegebauteilen, in dieser Ausführungsform zwischen dem zweiten Auslegebauteil 6' und dem ersten Auslegebauteil 5', des zweiten Stützelement 3' zur Folge hat.The synchronization device further comprises a second cable-type synchronization element 14, which is attached at one end to one of the extension components, in this embodiment to the second extension component 6, of the first support element 3, and at the other end to the same of the extension components, here also to the second extension component 6' of the second support element 3'. The synchronization device further comprises two second deflection rollers 15, 16, each of which is attached to a different one of the extension components, in this embodiment to the first extension component 5, 5'. The second cable-type synchronization element 14 is deflected by means of the two second deflection rollers 15, 16 in such that an opposite relative displacement RV' between two of the cantilever components, in this embodiment between the third cantilever component 7 and the first cantilever component 5, of the first support element 3 results in an opposite relative displacement RV' between the two identical cantilever components, in this embodiment between the second cantilever component 6' and the first cantilever component 5', of the second support element 3'.

In alternativen Ausführungsformen können das zweite seilzugartige Synchronisationselement 14 und die zwei zweiten Umlenkrollen 15, 16 auch an anderen Auslegebauteilen 5, 5', 6, 6', 7, 7' des ersten Stützelements 3 und des zweiten Stützelements 3' angebracht sein, wobei wesentlich ist, dass die beiden Auslegebauteile 5, 5', 6, 6', 7, 7' von einem der Stützelemente 3, 3' jeweils unterschiedlich sind und das Auslegebauteil 5, 5', 6, 6', 7, 7' an dem ersten Stützelement 3 und dem zweiten Stützelement 3' jeweils das gleiche Auslegebauteil 5, 5', 6, 6', 7, 7' ist.In alternative embodiments, the second cable-type synchronization element 14 and the two second deflection rollers 15, 16 can also be attached to other extension components 5, 5', 6, 6', 7, 7' of the first support element 3 and the second support element 3', wherein it is essential that the two extension components 5, 5', 6, 6', 7, 7' of one of the support elements 3, 3' are each different and the extension component 5, 5', 6, 6', 7, 7' on the first support element 3 and the second support element 3' is the same extension component 5, 5', 6, 6', 7, 7'.

Das erste seilzugartige Synchronisationselement 11 und das zweite seilzugartige Synchronisationselement 14 sind jeweils als ein Stahlband ausgeführt. In alternativen Ausführungsformen können das erste seilzugartige Synchronisationselement 11 und das zweite seilzugartige Synchronisationselement 14 auch beispielsweise jeweils als ein Kunststoffband oder ein Stahlseil ausgeführt sein.The first cable-type synchronization element 11 and the second cable-type synchronization element 14 are each designed as a steel band. In alternative embodiments, the first cable-type synchronization element 11 and the second cable-type synchronization element 14 can also be designed, for example, as a plastic band or a steel cable.

Fig. 2 zeigt eine Prinzipdarstellung von einem der Stützelemente 3 mit einer Kopplungseinrichtung des ersten Auslegebauteils 5, des zweiten Auslegebauteils 6 und des dritten Auslegebauteils 7. Das erste Auslegebauteil 5, das zweite Auslegebauteil 6 und das dritte Auslegebauteil 7 sind so miteinander gekoppelt, dass, bei der Längenänderung L des ersten Stützelements 3, eine Verschiebung des zweiten Auslegebauteils 6 zu dem ersten Auslegebauteil 5 in einer Richtung parallel zu der Längenänderung L synchron eine Verschiebung des dritten Auslegebauteils 7 zu dem zweiten Auslegebauteil 6 in der gleichen Richtung bewirkt. Das zweite Stützelement 3' weist eine identische Kopplungseinrichtung auf. Fig.2 shows a schematic diagram of one of the support elements 3 with a coupling device of the first extension component 5, the second extension component 6 and the third extension component 7. The first extension component 5, the second extension component 6 and the third extension component 7 are coupled to one another in such a way that, when the length L of the first support element 3 changes, a displacement of the second extension component 6 relative to the first extension component 5 in a direction parallel to the length change L synchronously causes a displacement of the third extension component 7 relative to the second extension component 6 in the same direction. The second support element 3' has an identical coupling device.

Als die Kopplungseinrichtung weist die Stützvorrichtung 3 ein endloses seilzugartiges Element 8 auf. Ferner weist die Stützvorrichtung 3, zwei dritte Umlenkrollen 9, 10 auf, die in der Richtung der Längenänderung L beabstandet angeordnet und mit dem zweiten Auslegebauteil 6 verbunden sind, auf. Das endlose seilzugartige Element 8 ist dazu ausgebildet, dass es durch die zwei dritten Umlenkrollen 9, 10 spielfrei umgelenkt wird und jeweils ein Abschnitt 8.1, 8.2 in der Richtung der Längenänderung L zwischen den zwei dritten Umlenkrollen 9, 10 ist mit dem ersten Auslegebauteil 5 und dem dritten Auslegebauteil 7 verbunden. Hierbei ist der Abschnitt 8.1 mit dem ersten Auslegebauteil 5 und der Abschnitt 8.2 mit dem dritten Auslegebauteil 7 verbunden.As the coupling device, the support device 3 has an endless cable-like element 8. The support device 3 also has two third deflection rollers 9, 10, which are arranged at a distance in the direction of the length change L and are connected to the second extension component 6. The endless cable-like element 8 is designed so that it is deflected without play by the two third deflection rollers 9, 10 and a section 8.1, 8.2 in the direction of the length change L between the two third deflection rollers 9, 10 is connected to the first extension component 5 and the third extension component 7. The section 8.1 is connected to the first extension component 5 and the section 8.2 is connected to the third extension component 7.

Ein Ausmaß der Verschiebung zwischen dem zweiten Auslegebauteil 6 und dem ersten Auslegebauteil 5 und ein Ausmaß der Verschiebung zwischen dem dritten Auslegebauteil 7 und dem zweiten Auslegebauteil 6 sind in dieser Ausführungsform identisch.An amount of displacement between the second cantilever member 6 and the first cantilever member 5 and an amount of displacement between the third cantilever member 7 and the second cantilever member 6 are identical in this embodiment.

In alternativen Ausführungsformen kann, wenn eine Kopplung der unterschiedlichen Auslegebauteile 5, 5', 6, 6', 7, 7' beispielsweise über miteinander gekoppelte Gewindestangen mit unterschiedlichen Steigungen erfolgt, das Ausmaß der Verschiebung zwischen dem zweiten Auslegebauteil 6, 6' und dem ersten Auslegebauteil 5, 5' und das Ausmaß der Verschiebung zwischen dem dritten Auslegebauteil 7, 7' und dem zweiten Auslegebauteil 6, 6' unterschiedlich sein.In alternative embodiments, if the different cantilever components 5, 5', 6, 6', 7, 7' are coupled, for example, via threaded rods coupled to one another with different pitches, the extent of the displacement between the second cantilever component 6, 6' and the first cantilever component 5, 5' and the extent of the displacement between the third cantilever component 7, 7' and the second cantilever component 6, 6' can be different.

Das seilzugartige Element 8 ist als ein Stahlband ausgeführt. In alternativen Ausführungsformen kann das seilzugartige Element 8 auch beispielsweise als ein Kunststoffband oder ein Stahlseil ausgeführt sein.The cable-like element 8 is designed as a steel band. In alternative embodiments, the cable-like element 8 can also be designed, for example, as a plastic band or a steel cable.

Fig. 3 zeigt eine Querschnittsansicht einer der Umlenkrollen 9, 10, 12, 13, 14, 15. Fig.3 shows a cross-sectional view of one of the pulleys 9, 10, 12, 13, 14, 15.

Die ersten, zweiten und dritten Umlenkrollen 9, 10, 12, 13, 14, 15 weisen entlang ihrer Drehachse eine Balligkeit an ihrer Lauffläche, nämlich eine Auswölbung der Lauffläche zu der Mitte der Lauffläche hin, auf. In alternativen Ausführungsformen können zumindest einige von den ersten, zweiten und dritten Umlenkrollen 9, 10, 12, 13, 14, 15 auch mit einer geraden Lauffläche entlang ihrer Drehachse versehen sein.The first, second and third deflection rollers 9, 10, 12, 13, 14, 15 have a crowning on their running surface along their axis of rotation, namely a bulge of the running surface towards the center of the running surface. In alternative embodiments at least some of the first, second and third deflection rollers 9, 10, 12, 13, 14, 15 can also be provided with a straight running surface along their axis of rotation.

In einer alternativen Ausführungsform ist die Gasdruckfeder zwischen dem ersten Stützelement 3 und dem zweiten Stützelement 3' vorgesehen und dazu ausgebildet, die Antriebs- oder Unterstützungskraft auf das erste oder zweite Seilzug-artige Synchronisationselement 11, 14 aufzubringen.In an alternative embodiment, the gas pressure spring is provided between the first support element 3 and the second support element 3' and is designed to apply the driving or supporting force to the first or second cable-type synchronization element 11, 14.

In einer weiteren alternativen Ausführungsform ist die Synchronisationseinrichtung nicht mit seilzugartigen Synchronisationselementen versehen, sondern die Synchronisation erfolgt beispielsweise über eine Achse mit beidseitigem Kegelradgetriebe und jeweiligen Gewindespindeln.In a further alternative embodiment, the synchronization device is not provided with cable-type synchronization elements, but the synchronization takes place, for example, via an axis with a bevel gear on both sides and respective threaded spindles.

Alle in der Beschreibung, den nachfolgenden Ansprüchen und der Zeichnung dargestellten Merkmale können sowohl einzeln als auch in beliebiger Kombination miteinander erfindungswesentlich sein.All features presented in the description, the following claims and the drawings can be essential to the invention both individually and in any combination with one another.

Claims (12)

  1. Supporting device for a height-adjustable table (1), comprising:
    a first supporting element (3) and at least one second supporting element (3'), wherein the first supporting element (3) and the at least one second supporting element (3') each
    comprise a first extension component (5, 5'), a second extension component (6, 6'), and a third extension component (7, 7'), wherein
    the first extension component (5, 5'), the second extension component (6, 6') and the third extension component (7, 7') are arranged so as to be displaceable relative to one another in order to respectively cause a change in length (L) of the first supporting element (3) and of the at least one second supporting element (3'),
    the second extension component (6, 6') is arranged in a direction of the change in length (L) between the first extension component (5, 5') and the third extension component (7, 7'),
    the first extension component (5, 5'), the second extension component (6, 6') and the third extension component (7, 7') are coupled to one another such that, during the change in length (L) of the first supporting element (3) and of the at least one second supporting element (3'), a displacement of the second extension component (6, 6') with respect to the first extension component (5, 5') in a direction parallel to the change in length (L) synchronously causes a displacement of the third extension component (7, 7') with respect to the second extension component (6, 6') in the same direction,
    and a synchronization device which is designed to synchronize, amongst the first supporting element (3) and the at least one second supporting element (3'), the displacement of the second extension component (6, 6') with respect to the first extension component (5, 5') or the displacement of the third extension component (7, 7') with respect to the second extension component (6, 6'),
    wherein
    the supporting device comprises a drive or assist element (17, 17') which drives or assists the change in length (L) of the first supporting element (3) and of the at least one second supporting element (3'), and
    the drive or assist element (17, 17') is designed to apply a drive or assist force between the first extension component (5, 5') and the second extension component (6, 6'),
    wherein
    the synchronizing device comprises:
    a first rope-like synchronizing element (11) which is fastened at one end to one of the extension components (5, 6, 7) of the first supporting element (3) and is fastened at the other end to the same one of the extension components (5', 6', 7') of the at least one second supporting element (3'), and
    two first deflection rollers (12, 13) which are each fastened to another one of the extension components (5, 5', 6, 6', 7, 7') of the first supporting element (3) and of the at least one second supporting element (3, 3'), wherein the other one of the extension components (5, 5', 6, 6', 7, 7') of the first supporting element (3) and of the at least one second supporting element (3') is respectively the same extension component (5, 5', 6, 6', 7, 7'), wherein
    a deflection of the first rope-like synchronizing element (11) takes place by means of the first deflection rollers (12, 13) in such a way that a first relative displacement (RV) between two of the extension components (5, 6, 7) of the first supporting element (3) results in a synchronous relative displacement (RV) between the two same extension components (5', 6', 7') of the at least one second supporting element (3'), and
    the first rope-like synchronizing element (11) is fastened to the second extension component (6, 6').
  2. Supporting device according to claim 1, wherein
    an extent of the displacement between the second extension component (6, 6') and the first extension component (5, 5') and an extent of the displacement between the third extension component (7, 7') and the second extension component (6, 6') are identical.
  3. Supporting device according to one of claims 1 or 2, wherein
    the supporting device comprises
    an endless rope-like element (8), and
    two third deflection rollers (9, 10) which are arranged spaced apart in the direction of the change in length (L) and are connected to the second extension component (6, 6'), wherein
    the endless rope-like element (8) is designed to be deflected in a backlash-free manner by the two third deflection rollers (9, 10), and a portion (8.1, 8.2) of the endless rope-like element (8) in the direction of the change in length (L) between the two third deflection rollers (9, 10) is connected to the first extension component (5, 5') and the third extension component (7, 7'), respectively.
  4. Supporting device according to claim 3, wherein
    the rope-like element (8) is a steel band.
  5. Supporting device according to one of claims 3 or 4, wherein
    the third deflection rollers (9, 10) have a convexity on their running surface along their axis of rotation.
  6. Supporting device according to one of the preceding claims, wherein
    the synchronizing device comprises:
    a second rope-like synchronizing element (14) which is fastened at one end to one of the extension components (5, 6, 7) of the first supporting element (3) and is fastened at the other end to the same one of the extension components of the at least one second supporting element, and
    second deflection rollers (15, 16) which are each fastened to the other one of the extension components (5, 5', 6, 6', 7, 7') of the first supporting element (3) and of the at least one second supporting element (3'), wherein the other one of the extension components (5, 5', 6, 6', 7, 7') of the first supporting element (3) and of the at least one second supporting element (3') is respectively the same extension component (5, 5', 6, 6', 7, 7'), wherein
    a deflection of the second rope-like synchronizing element (14) takes place by means of the second deflection rollers (15, 16) in such a way that an opposite relative displacement (RV') between two of the extension components (5, 6, 7) of the first supporting element (3) opposite to the first relative displacement (RV) in the first supporting element (3) results in a synchronous opposite relative displacement (RV') between the two same extension components (5', 6', 7') of the at least one second supporting element (3).
  7. Supporting device according to claim 6, wherein
    the first rope-like synchronizing element (11) and the second rope-like synchronizing element (14) each is a steel band.
  8. Supporting device according to one of claims 6 or 7, wherein
    the first deflection rollers (12, 13) and second deflection rollers (15, 16) have a convexity on their running surface along their axis of rotation.
  9. Supporting device according to one of the preceding claims, wherein
    the drive or assist element (17, 17') is a gas compression spring.
  10. Supporting device according to claim 9, wherein
    the gas compression spring is arranged in at least one of the first supporting element (3) and the at least one second supporting element (3').
  11. Supporting device according to claim 9, wherein
    the gas compression spring is provided between the first supporting element (3) and the at least one second supporting element (3') and is designed to apply a drive or assist force to the rope-like synchronizing element (11, 14).
  12. Height-adjustable table (1) with a supporting device according to one of the preceding claims.
EP21175115.1A 2020-09-23 2021-05-20 Supporting device for a height-adjustable table frame Active EP3973817B1 (en)

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DE102020211930A1 (en) 2022-03-24
US11607034B2 (en) 2023-03-21
US20220087410A1 (en) 2022-03-24
EP3973817A1 (en) 2022-03-30
CN114246416A (en) 2022-03-29

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