EP1809142A1 - Colonne de levage - Google Patents

Colonne de levage

Info

Publication number
EP1809142A1
EP1809142A1 EP05800744A EP05800744A EP1809142A1 EP 1809142 A1 EP1809142 A1 EP 1809142A1 EP 05800744 A EP05800744 A EP 05800744A EP 05800744 A EP05800744 A EP 05800744A EP 1809142 A1 EP1809142 A1 EP 1809142A1
Authority
EP
European Patent Office
Prior art keywords
section
lifting column
innermost
intermediate section
column according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05800744A
Other languages
German (de)
English (en)
Inventor
Henning Kristensen
Jens Jørgen NIELSEN
Norbert Klinke
Christian Platz
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.)
Linak AS
Original Assignee
Linak AS
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
Application filed by Linak AS filed Critical Linak AS
Publication of EP1809142A1 publication Critical patent/EP1809142A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A47B9/04—Tables with tops of variable height with vertical spindle
    • 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
    • A47B9/06—Tables with tops of variable height with vertical toothed rack
    • 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
    • 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
    • A47B2200/0051—Telescopic
    • A47B2200/0054—Telescopic with three telescopic parts

Definitions

  • the present invention relates to a lifting column comprising a guide having an outermost section, an innermost section as well as at least one interme- diate section, said sections being arranged to be mutually telescopic, with slides arranged between the sections, and comprising a drive device for causing the telescopic movement.
  • the disclosure will be based on lifting columns having three members for height-adjustable tables, where a dis ⁇ tinction is made between synchronous and asynchronous lifting columns.
  • the intermediate section of the guide is forcibly controlled to move simultaneously with the innermost section, i.e. at the same time as the innermost section extends out of the intermediate section, this extends out of the outermost section, just as they retracts in the same order.
  • the intermediate section is freely between the outermost and innermost sections. The innermost section extends first, and when this has been extended fully, the intermediate section begins to extend, as the innermost section, by mutual abutment, brings along the intermediate section.
  • the problem is, however, that friction in the slides between the individual sections interferes in a disturbing manner such that the intermediate section may unintentionally hang on the innermost section, thereby producing an arbitrary pattern of movement. If, e.g., the intermediate section hangs, this will be seen to run out first, and then the innermost section will be seen to extend out of the intermediate section.
  • the pattern of movement becomes particularly inelegant if the friction suddenly fails and the intermediate section slides down, or the intermediate section is suddenly caused to hang at the outermost section, whereby the intermediate section is moved in steps.
  • the drive device is constructed such that the intermediate section may be secured to it and be moved in synchronism with the innermost section.
  • the object of the invention is to overcome the problems outlined above.
  • the lifting column com ⁇ prises independent means for synchronized control of the at least one in- termediate section relative to the outermost and innermost sections.
  • a clear division of the lifting column into a guide, a drive device and synchroniza ⁇ tion means provides greater freedom with respect to design and construc ⁇ tion.
  • Fig. 1 shows a sitting/standing table shown with a transparent tabletop
  • fig. 2 shows a partly exploded view of a synchronization means for forcible control of the intermediate section in the lifting columns for the table
  • fig. 3 shows a sketch of a synchronization means based on racks and a wire
  • fig. 4 shows a sketch of a variant of the embodiment of fig. 3, in which the wire is replaced by a plurality of gear wheels,
  • fig. 5 shows sketches of an embodiment of the synchronization means with two racks in engagement with a gear wheel
  • fig. 6 shows sketches of an embodiment with racks mounted on the sides of the outermost section and the innermost section, re- spectively,
  • fig. 7 shows sketches of an embodiment of the synchronization means based on spindles
  • fig. 8 shows a sketch of an embodiment with a synchronization means with a motor-driven spindle
  • fig. 9 shows sketches of a synchronization means based on rollers between the sections
  • fig. 10 shows sketches of an embodiment of the synchronization means based on wires
  • fig. 11 shows sketches of an embodiment of the synchronization means based on springs
  • fig. 12 shows a sketch of an exploded column, where the synchroniza ⁇ tion is carried out by threads between the individual sections.
  • Fig. 1 of the drawing shows a sitting/standing table with a lifting column at each side. It is observed that the tabletop is shown to be transparent.
  • the lifting column consists of a guide with three members, viz. an outermost section 1 , and intermediate section 2 and an innermost section 3 arranged telescopically inside each other, with slides arranged in the gaps between the individual sections.
  • the lower end of the outermost section 1 is secured to a foot 4, while the upper end of the innermost section 3 is secured to the lower side of the tabletop 5.
  • a drive device based on a solid spindle and a hollow spindle driven by an electric motor via a gear transmission, typically a worm gear.
  • a first embodiment of the invention is shown in fig. 2.
  • a synchronization means is provided for forcibly controlling the intermediate section 2, com ⁇ prising a chassis in the form of a U-rail 7 of bent sheet metal strip. Upwardly and downwardly in the rail, there is a deflection wheel 8, 9 around which a wire 10 is passed. One end of the wire is secured to the innermost section by a bracket 11. From there, the wire runs around the lowermost wheel 9 and up around the uppermost one 8 and down again around the lowermost one and is finally secured by a bracket 12 to the wire run extending be ⁇ tween the two wheels.
  • a rod 13 is secured with one end to the same bracket 12, and the lower end of the rod may be screwed firmly on to a bottom plate in the outermost section 1 by a bracket 14.
  • the synchroniza ⁇ tion means may be secured to the central section 2.
  • a plate member 15 is welded in the lower end of the intermediate section 2, and a block 16 having a threaded hole is provided in the lower ⁇ most end of the U-rail 7 so that the means may be screwed firmly on to the plate member.
  • the assembly is simple, since it may be performed from the ends of the individual sections.
  • the drive device When the drive device is activated for ex ⁇ tending the innermost section, a pull is applied to the wire 1O, whereby it is attempted to press the rod 13 downwards, but since it is secured to the lowermost section, the U-rail 7 and thereby the intermediate section 2 will rise instead.
  • the intermediate section 2 will be extended syn- chronously with the innermost section.
  • the synchronization means may be made quite slender, since they are not to carry the load on the column.
  • WO 03/003876 to Linak A/S discloses a drive unit for a lifting column based on an endless element with two rods.
  • the drive unit per se causes the central sec ⁇ tion to be synchronized.
  • the synchronization means according to the in ⁇ vention are intended for use in connection with an independent drive de ⁇ vice, e.g. as illustrated in fig. 5 of WO 02/39848 to Linak A/S, said drive de- vice being based on a hollow spindle in cooperation with a solid spindle.
  • WO 01/78556 to Okin Deutschen fur Antriebstechnik GmbH & Co. KG. discloses a lifting column like the latter with spindles, where the central section is connected with the hollow spindle.
  • a variant of the above-mentioned configuration of the synchronization means is that the wire 10 is endless, and that both runs of it are connected with a rod, so that also the innermost section 3 of the column is connected with the wire by a rod.
  • the pull on the rod connected therewith will pull the wire, and, thereby, the rod on the other run of the wire will try to move downwards, as described above.
  • Fig. 3 shows a variant, where each deflection wheel 8, 9 is connected with a gear wheel 17, 18 in engagement with a rack 19, 20 of its own, whose free end is connected with the outermost profile 1 and the innermost profile 3, respectively.
  • the rack 19 se ⁇ cured thereto will cause the deflection wheel 8, the wire 10 and thereby the lowermost deflection wheel 9, the gear wheel 18 to move and thereby syn ⁇ chronously extend the intermediate section 2, as the rack 20 presses on the bottom of the outermost member 3.
  • Fig. 4 shows a variant, in which a train 21 of gear wheels is provided in ⁇ stead of a wire and deflection wheels.
  • the last gear wheels 22, 23 in the train are in engagement with the respective racks 19, 20 directly or via a separate gear wheel connected with the last gear wheel.
  • FIG. 5 Another embodiment based on a single gear wheel 24 and two racks 25, 26 is shown in fig. 5.
  • the lower end of the intermediate section 2 has secured thereto a rod 27 having a head 27a with an opening in which the gear wheel 24 is mounted.
  • the gear wheel extends with the teeth outside the rod.
  • the racks 25, 26 extend through the opening on each side of the gear wheel 24, i.e. the racks are guided in the opening and are moved along the rod.
  • the structure is expediently made entirely of plastics.
  • a further embodiment with racks is shown in fig. 6, in which a rack 28 is secured on the inner side of the outermost section 1.
  • This rack 28 extends at least over the lower half of the section, and is here provided with teeth on both longitudinal narrow sides.
  • Two racks 29, 30 are secured to the outer side of the innermost section 3 on each side of this rack 28, said racks 29, 30 extending at least over the upper half of the length of the innermost sec ⁇ tion.
  • Two pairs of gear wheels 31, 32 are provided in the intermediate sec- tion 2. The gear wheels of each pair are fitted on the inner side and the outer side, respectively, of the section 2 and are in engagement with the respective racks 29, 30 on the innermost section 3 and the rack 28 on the outermost section 1.
  • the inter- mediate profile 2 When the innermost section 1 is extended, the inter- mediate profile 2 will run partly along the rack 28 on the outermost profile and partly along the racks 29, 30 on the innermost profile.
  • the mechanism With sections of a circular cross-section, the mechanism will also serve as a rotation protec ⁇ tion, i.e. protection against mutual rotation of the sections 1, 2, 3 about their axial axes.
  • the sections 1 , 2, 3 are simply mutually locked by the racks 28, 29, 30 in engagement with the gear wheels 31, 32.
  • FIG. 7 Still another embodiment based on spindles is shown in fig. 7 of the draw ⁇ ing.
  • the two spindles 33, 34 are connected with each other via a gear transmission arranged in the intermediate section.
  • the one spindle 34 is connected with the outermost section 1, and the other spindle 33 is in en ⁇ gagement with a spindle nut 35 secured to the innermost section 1.
  • the column is shown upside down here, e.g. with the outermost section 1 at the top and the innermost section 3 at the bottom. When the outermost section 1 is extended, the spindle 34 connected with the top of the outermost sec- tion via the gear transmission 36 will cause the other spindle 33 to rotate.
  • the gear transmission 36 comprises a toothed rim 37 in engagement with a gear wheel 38 on the end of the spindle 33 as well as the spindle nut 39, which is externally con- figured as a gear wheel.
  • the parts are arranged in a housing consisting of two halves 40, 41.
  • the solid spindle 44 is connected via a gear transmission 45 with the transmission for a solid spindle 46 in the lifting device for the column.
  • the solid spindle in the lifting device is in engagement with a hollow spindle 47, which is in turn in en- gagement with a nut in a carrier pipe 48 mounted in the outermost member 1.
  • the whole is driven by a motor 49.
  • the solid spindle 44 for moving the intermediate section 2 is in engagement with a spindle nut in the upper end of a carrier pipe 50 mounted in the intermediate section 2. It will be appre- dated that the solid spindle 44 with associated carrier pipe 50 and nut for moving the intermediate section 2 may be made very slender, since they are not to carry the load, but exclusively move the intermediate section.
  • the nut might merely be carried by a rod rather than a pipe.
  • the spindle part, i.e. the spindle 44, the spindle nut, the carrier pipe 50 and the gear wheel might be made of plastics, for that matter.
  • rollers 51 Another embodiment based on specially configured rollers 51 in the gap between the individual sections is shown in fig. 9 of the drawing.
  • the rollers have an appearance like "dumbbells" with a large portion 52 at each end and an intermediate portion 53 of half the diameter.
  • the roller is of a friction material, e.g. with a rubber surface.
  • the two large portions 52 are in en ⁇ gagement with the outer side of the one section 1 , 2, while the intermediate portion 53 is in engagement with a strip 54 on the inner side of the subse ⁇ quent section 2, 3.
  • the struc ⁇ ture has the additional advantage that it serves as a rotation protection in columns of a circular cross-section.
  • the strip 54 disposed between the two large portions 52 on the roller 51 prevents the sections 1, 2, 3 from rotating mutually.
  • Still another embodiment based on a wire, a cord, a tape, a belt or the like is shown in fig. 10 of the drawing.
  • the wire 55 is secured with its one end at the upper end of the innermost section 3 and, over a deflection roller 56 at the lower edge of the intermediate section 2, is passed up for attachment at the upper edge of the outermost section 1.
  • the intermediate section 2 will be raised, too, by the pull in the wire 55. It is observed for the sake of good order that it is only the one side wall of the sections which is shown in the two sketches to the right in fig.10.
  • an additional wire 57 is secured at the lower edge of the innermost section 3 and, over a deflection roller 58 at the upper edge of the intermediate section 2, is passed down for attachment at the lower edge of the outermost section 1.
  • the deflection rollers need not necessarily be wheels, but may be semicir ⁇ cular guides.
  • a particularly simple guide, which also prevents the wire from dropping off, is formed by a pipe bend, e.g. just a length of hose 58 which is bent.
  • a further embodiment based on fixing the intermediate section 2 between two sets of springs 59, 60 is shown in fig. 11.
  • the one spring 60 is secured with its one end at the lower edge of the innermost section 3 and with the other end at the upper edge of the intermediate section 2, while the other spring 59 is secured with its one end at the lower edge of the intermediate section 2 and with the other end to the upper edge of the outermost section 3.
  • the springs may be screw springs which sur ⁇ round the sections 2, 3, but it may also be resilient bands placed at one or more locations on the circumference of the sections. It is observed for the sake of good order that it is only the one side wall of the sections which is shown in the sketch.
  • FIG. 12 shows a particularly simple embodiment with threads in the form of a strip 61, 62 secured internally in the outermost and the intermediate sections 1, 2.
  • a key e.g. just in the form of two bosses, is mounted on the innermost sec- tion 3 and the intermediate section 2 in engagement with the respective strips 61, 62.
  • Still another way of providing the synchronization is with a pulley in connec ⁇ tion with the intermediate section, and where two separate wires are con ⁇ nected with the inner section and the outer section, respectively.
  • the wires are wound around the pulley in the same direction, so that they both slacken or tauten at the same time.
  • the pulley may be provided with a spring device which automatically coil up the wires and keep them taut.
  • the pulley is secured with two steel strips in the intermediate section. The one steel strip is secured in the innermost section, and the other is pulled through two pulleys on the outermost section and is pulled back, and the end is secured to the intermediate section.
  • the distribution of the steel strips is one to two, i.e. the innermost and inter ⁇ mediate sections are extended in synchronism.
  • a further solution for synchronized control of the intermediate section is based on connected cylinders, where a fluid, preferably liquid, is moved from one cylinder to the other.
  • the intermediate section is moved half the travel of the innermost section by using half the diameter of the cylinder secured to the intermediate section.

Landscapes

  • Transmission Devices (AREA)

Abstract

La présente invention concerne une colonne de levage comprenant un guide qui présente une section externe, une section interne et au moins une section intermédiaire. Ces sections sont mutuellement télescopiques et présentent des glissières situées entre les sections. La colonne comprend également un dispositif d'entraînement qui permet le mouvement télescopique dudit guide. Afin de permettre un mouvement simultané de ladite section intermédiaire et de la section extérieure, la colonne de levage comprend des systèmes indépendants conçus pour commander de façon synchronisée la section intermédiaire par rapport à la section extérieure et à la section intérieure.
EP05800744A 2004-11-12 2005-11-11 Colonne de levage Withdrawn EP1809142A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200401742 2004-11-12
PCT/DK2005/000723 WO2006050735A1 (fr) 2004-11-12 2005-11-11 Colonne de levage

Publications (1)

Publication Number Publication Date
EP1809142A1 true EP1809142A1 (fr) 2007-07-25

Family

ID=35976406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05800744A Withdrawn EP1809142A1 (fr) 2004-11-12 2005-11-11 Colonne de levage

Country Status (2)

Country Link
EP (1) EP1809142A1 (fr)
WO (1) WO2006050735A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2059208B1 (fr) 2006-08-24 2010-07-14 NRT-Nordisk Røntgen Teknik A/S Colonne élévatrice avec table de support de patient
WO2017079917A1 (fr) * 2015-11-11 2017-05-18 La (Linear Adjustment) Dev. Limited Dispositif de support télescopique pour meuble
ITUA20164682A1 (it) * 2016-06-27 2017-12-27 Unifor Spa Gamba di sostegno a lunghezza regolabile telescopicamente per un elemento di arredo ed elemento di arredo comprendente detta gamba di sostegno
CN206413973U (zh) * 2016-10-25 2017-08-18 绍兴康拓传动科技有限公司 升降台
DE102018105378A1 (de) * 2018-03-08 2019-10-02 Sedus Stoll Ag Teleskopierbares Bein für ein Möbelstück sowie ein Möbelstück mit einem derartigen Bein
NL2026688B1 (nl) * 2020-10-15 2022-06-14 Ampo Holding Ltd Gesegmenteerd steunlichaam

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513249C2 (sv) * 1998-06-29 2000-08-07 Mpi Teknik Ab Teleskoppelare, speciellt till höjdinställbara arbetsbord, innefattande tre rörformiga sektioner
DK199800468U3 (da) * 1998-12-11 1999-08-27 Henrik Lehm Højderegulerbar synkronmekanisme til PC-arbejdsborde
EP1272791A1 (fr) * 2000-03-31 2003-01-08 Jorgen Larsen Dispositif telescopique
DE10018742B4 (de) 2000-04-15 2004-09-16 OKIN Gesellschaft für Antriebstechnik mbH & Co. KG Vorrichtung zum Verstellen von relativ zueinander beweglichen Teilen
EP1339302A1 (fr) 2000-11-17 2003-09-03 Linak A/S Actionneur lineaire
WO2003003876A1 (fr) 2001-07-04 2003-01-16 Linak A/S Unite d'entrainement, de preference pour colonnes de levage pour tables a hauteur reglable, et colonne de levage
SE524071C2 (sv) * 2002-11-08 2004-06-22 Rol Ergonomic Ab Anordning för kontrollerad teleskopering av flerstegs teleskoprör samt sätt att medelst en dylik anordning synkronisera samverkande teleskoprörsektioner med avseende på deras rörelseförlopp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006050735A1 *

Also Published As

Publication number Publication date
WO2006050735A1 (fr) 2006-05-18

Similar Documents

Publication Publication Date Title
EP1809142A1 (fr) Colonne de levage
CN101061332B (zh) 线性驱动器
JP6552807B2 (ja) 上下調節可能な脚を有する家具
JP5444223B2 (ja) 無段階に高さ調節可能な乳児用マットレス支持体及びそのための装置
EP2197406B1 (fr) Colonne élévatrice pour tables de traitement, lits d'hôpitaux et de soins
US20130015300A1 (en) Telescopic column, preferably for furniture
US20140196553A1 (en) Adjustable object
EP3203007B1 (fr) Rideau sans fil
CA2953344C (fr) Dispositifs et systemes de rassemblement de cordons de levage utilises pour soulever des couvertures d'ouvertures architecturales
WO2017079917A1 (fr) Dispositif de support télescopique pour meuble
EP3378350A1 (fr) Colonne télescopique dotée d'un câble interne
CA2931680A1 (fr) Dispositif d'entrainement pour colonne de soutien
US20120280604A1 (en) Arrangement for height adjustment preferably for kitchen tables with base cabinets
EP3772295B1 (fr) Système de levage d'écran pour la disposition dans les meubles ou les meubles intégrés
KR20050035521A (ko) 프로파일 부품들을 가요성 재료 스트립을 거쳐서 서로에대해 변위시키는 구동 장치, 길이 조정식 하우징, 가구 제품
WO1999019247A1 (fr) Colonne de support telescopique
JP2013023323A (ja) 昇降装置
DE10102484A1 (de) Höhenverstellbarer Tisch, insbesondere Sitzsteh Arbeitsplatz mit Motorhöhenschnellverstellung
EP2675980B1 (fr) Cordon de tirage renforcé pour des revêtements architecturaux
CN111265055A (zh) 一种升降控制装置及升降床
DE102004046673A1 (de) Hubeinrichtung für Möbel, insbesondere für Tische
CN213695862U (zh) 一种穿带机及其穿绳装置
EP2201860A1 (fr) Agencement de tuyaux télescopiques
CN210077335U (zh) 窗帘安装结构
JP4162104B2 (ja) スライド式昇降装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20070501

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20080521

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150602