EP1230872B1 - Lifting column preferably for furniture such as tables and beds - Google Patents

Lifting column preferably for furniture such as tables and beds Download PDF

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Publication number
EP1230872B1
EP1230872B1 EP02075543A EP02075543A EP1230872B1 EP 1230872 B1 EP1230872 B1 EP 1230872B1 EP 02075543 A EP02075543 A EP 02075543A EP 02075543 A EP02075543 A EP 02075543A EP 1230872 B1 EP1230872 B1 EP 1230872B1
Authority
EP
European Patent Office
Prior art keywords
spindle
lifting column
column according
motor
column
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.)
Revoked
Application number
EP02075543A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1230872A1 (en
Inventor
Norbert Klinke
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8160196&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1230872(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Linak AS filed Critical Linak AS
Publication of EP1230872A1 publication Critical patent/EP1230872A1/en
Application granted granted Critical
Publication of EP1230872B1 publication Critical patent/EP1230872B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C19/00—Bedsteads
    • A47C19/04—Extensible bedsteads, e.g. with adjustment of length, width, height
    • A47C19/045—Extensible bedsteads, e.g. with adjustment of length, width, height with entire frame height or inclination adjustments
    • 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
    • A47B9/20—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
    • A47B2200/0056—Leg adjustment with a motor, e.g. an electric motor
    • A47B2200/0059—Leg adjustment with a motor, e.g. an electric motor in telescoping table legs

Definitions

  • the present invention relates to a lifting column of the type stated in the introductory portion of claim 1.
  • lifting columns for height-adjustable tables are chosen as a basis.
  • the columns consist of two or three mutually telescopically slidable tubular profile members.
  • An electrically driven linear actuator, concealed within the column, is typically used as a drive unit.
  • the actuators are of the type which is based on a spindle driven by an electric motor.
  • a tubular drive rod is connected with a spindle nut, and rotation of the spindle causes the drive rod to be extended or retracted depending on the direction of rotation of the spindle.
  • the stroke of the actuator is directly related to its mounting dimensions, which involves a conflict between the mounting dimensions of the column and the desired minimum and maximum height of the column. In reality, the achievable maximum and minimum height is a compromise where each millimetre in mounting dimensions and stroke counts.
  • the internal position of the actuator has a further adverse influence on the minimum/maximum height ratio.
  • control box containing a low volt power supply (DC 24V/48V) based on a transformer and a control device.
  • the wiring is rather comprehensive, as the control box is wired to the mains and is connected to the actuator as well as a control panel.
  • the control box is placed below the tabletop, and therefore it is necessary to take measures against electrical and magnetic impacts from there in order to avoid impacts on equipment positioned on the tabletop.
  • the control box is placed loosely on the floor, which is obviously not satisfactory.
  • the object of the invention is to improve the ratio of mounting dimension to stroke of the column as well as its stability.
  • a column according to the invention which is characterized in that the spindle is secured at the end of one member, that the spindle nut is connected with the adjacent end of the other member, and that the spindle nut may be caused to rotate by the motor via a transmission to bring about telescopic displacement of the members.
  • the electrical equipment may be arranged in the member with the motor.
  • the column may thus be finish-mounted at the factory, and moreover it has advantages in terms of electrical and magnetic shielding to place power supply and control enclosed in a metallic tube.
  • the motor is arranged with the motor shaft in parallel with the spindle, which allows a column of slim cross-section.
  • the motor is arranged with the motor shaft perpendicular to the spindle. This gives a lower mounting height, but it requires a larger cross-section of the column in the longitudinal extent of the motor.
  • the embodiment makes it directly possible to use a worm drive in the transmission. This is reliable and gives a good gearing down of the motor speed, just as it involves a low level of noise.
  • the spindle is secured at the end of the outer member, while the motor and the transmission as well as the spindle nut are arranged in the movable member.
  • the outer member may be arranged at the bottom, i.e. stationary, while the inner member may move out and in.
  • the inner member may be arranged at the bottom, i.e. stationary, while the outer member moves up and down this.
  • the column comprises three members, and the motor and the transmission are secured at the end of the inner member. Seated here is also the spindle nut which cooperates with a hollow spindle that extends through the intermediate member and is secured at the opposite end thereof. A spindle is secured at the remote end of the outer member, and this spindle is seated in the hollow spindle and cooperates with a spindle nut.
  • the spindle nut may be formed with a gear wheel, expediently having an internal toothing.
  • Nut and gear wheel may be moulded of plastics as an integral unit.
  • the spindle nut is coupled to the side of a separate gear wheel.
  • the end face of the nut may e.g. be formed with pins that extend into holes in the side of the gear wheel, or vice versa.
  • the engagement faces may also be provided with carrier teeth.
  • the gear wheel may also have a cylindrical portion in which the nut is seated completely or partly and is coupled by means of a splined connection.
  • the spindle nut or another cylindrical element in the transmission is provided with a helical spring, whose one end is fixed in the structure, and whose turns extend such that the spring exerts a braking force when the column is retracted. It is hereby possible to impart a self-blocking capability to the column or to increase its self-blocking capability when it is lowered.
  • the braking effect of the spring is determined empirically on the basis of the given purpose.
  • the power supply and/or the control electronics may be arranged inside the column.
  • it is arranged in the member with the motor.
  • the transformer may be arranged deep inside the member, it is possible to use a simple form of transformer, since it is well shielded, because the top of the column will typically be covered by an iron plate which is used as a mounting bracket for the column.
  • a ring core transformer this may be arranged such that the spindle may pass through its inner opening.
  • the column comprises an outer tube 1 and an inner tube 2 telescopically mounted in the outer tube.
  • the outer tube has an end bottom 3 to which a spindle 4 is secured with its end.
  • At the adjacent end of the inner tube there is an end bottom 5 that forms the chassis for an electric motor 6, a transmission 7 and a spindle nut 8.
  • the spindle nut is provided with an external toothing which is in engagement with a gear wheel 9 in the transmission.
  • a toothing 10 is provided on the side of the gear wheel, said toothing engaging two diametrically positioned gear wheels 11. Further, a worm wheel is provided in extension of these two gear wheels, said worm wheel being engaged with a worm 12 from the motor 6.
  • the spindle nut 8 When the motor is started in one direction of rotation, the spindle nut 8 will rotate in one direction and move up the spindle 4 and thereby push the inner tube 2 out. When the direction of rotation of the motor is reversed, the spindle nut 8 will rotate in the other direction and will then move down the spindle 4, thereby retracting the inner tube 2. As will appear, the lifting height of the column may substantially be maximized to the length of the outer tube 1. Then, the size of the overlap may be chosen freely, depending on the desired stability of the column.
  • Fig. 2 of the drawing shows an embodiment in which the spindle nut 8 is coupled to the side of a gear wheel 13 in that the nut 8 has a protruding portion 14, which extends into an opening 15 in the centre of the gear wheel and is connected by a splined connection.
  • the nut is here additionally provided with a brake in the form of a helical spring 16 which, with its turns, is wound around a cylindrical part of the nut 8. The turns extend such that the spring exerts a braking effect in the inward movement of the inner tube 2, i.e. decelerates the speed when the column is lowered and additionally contributes to the self-blocking capability of the column in the positions in which the inner tube might be parked.
  • the end bottom 5 for the inner tube 2 is formed by two half shells 5a, 5b with a dividing line which extends through the spindle and the motor shaft.
  • the end bottom passes like a plug up into the end of the inner tube and has an annular flange 17 for engagement with the end edge of the tube 2.
  • the end bottom has a bore 18 for the spindle 14, and a bore 19 for the motor shaft is also provided at the top of the bottom.
  • the end bottom has mounts for the spindle nut and various gear wheels in the transmission.
  • the end bottom may be finish-mounted with nut, gear wheel and motor and be secured as a unit in the bottom of the inner tube 2.
  • a control box 20 is indicated, which may merely be formed by a plastics sleeve without special strength, as it is protected in the inner tube 2.
  • the plastics sleeve preferably has an external cross-section so that it fits precisely in the inner tube 2.
  • the power supply is based on a ring core transformer 21 positioned such that the spindle can pass through the centre of it.
  • the control electronics is indicated at 22.
  • a column having three members 30, 31, 32 is indicated, where the motor 6 drives the nut 36 on the fixed spindle 35 via a hollow spindle 34, the reason being the considerably poorer efficiency of the hollow spindle 34 relative to the fixed spindle 35.
  • the intermediate member 31 is extended, the nut 34 on the hollow spindle 34 begins to rotate, and thereby the inner member 32 is extended.
  • the invention thus provides a compact and stable lifting column, and has incorporated power supply and control electronics in a special embodiment.
  • power supply and control electronics in structures having two, optionally more columns, it is just one that is equipped with power supply and control electronics, while the others are wired to it.

Landscapes

  • Transmission Devices (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Special Chairs (AREA)
  • Pyrrole Compounds (AREA)
EP02075543A 2001-02-09 2002-02-11 Lifting column preferably for furniture such as tables and beds Revoked EP1230872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200100215 2001-02-09
DKPA200100215 2001-02-09

Publications (2)

Publication Number Publication Date
EP1230872A1 EP1230872A1 (en) 2002-08-14
EP1230872B1 true EP1230872B1 (en) 2005-06-08

Family

ID=8160196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02075543A Revoked EP1230872B1 (en) 2001-02-09 2002-02-11 Lifting column preferably for furniture such as tables and beds

Country Status (5)

Country Link
EP (1) EP1230872B1 (es)
AT (1) ATE297145T1 (es)
DE (1) DE60204493T2 (es)
DK (1) DK1230872T3 (es)
ES (1) ES2241949T3 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026649A1 (en) * 2007-08-30 2009-03-05 Tf Poke Engineering Pty Ltd Jack
CN102295243A (zh) * 2011-08-01 2011-12-28 钟婕 一种双向非定距顶抵装置
EP2594156B1 (de) 2011-11-16 2015-02-25 Paul Hettich GmbH & Co. KG Teleskopierbare Hubsäule eines Möbelteils

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686943A1 (en) * 2003-11-18 2006-08-09 Linak A/S Hospital or care bed
US7712389B2 (en) 2006-05-16 2010-05-11 T-Motion Technology Co., Ltd. Lifting device having parallel double screw rods
DE102009015690A1 (de) 2009-03-31 2010-10-07 Logicdata Electronic & Software Entwicklungs Gmbh Linearantrieb und Tisch mit Linearantrieb
EP2301382A1 (en) * 2009-09-25 2011-03-30 Siemens AB Telescopic column for height adjustment
US20120280604A1 (en) * 2009-12-09 2012-11-08 Linak A/S Arrangement for height adjustment preferably for kitchen tables with base cabinets
DE102010010729A1 (de) 2010-03-09 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Hubvorrichtung einer Liegevorrichtung, beispielsweise einer Patientenliege
DE102010010730A1 (de) 2010-03-09 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Hubvorichtung einer Liegevorrichtung, bespielsweise einer Patientenliege
DK177259B1 (da) * 2010-11-16 2012-08-27 Reac Ab Røraktuator
DE102012217067A1 (de) * 2012-09-21 2014-03-27 Rössle & Wanner GmbH Verstellbare Unterfederung für ein Bett
DE102013006274A1 (de) * 2013-04-09 2014-10-09 Barbara Stelzner Hebevorrichtung für Zweiräder
DE102013226754A1 (de) 2013-12-19 2015-06-25 Aktiebolaget Skf Hubsäule
DE102015005062B4 (de) * 2015-04-21 2017-02-23 B. Ketterer Söhne GmbH & Co. KG Höhenverstelleinrichtung, die in einem Möbelbein anordenbar ist
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
CN106335860A (zh) * 2016-09-20 2017-01-18 浙江捷昌线性驱动科技股份有限公司 一种双马达升降立柱
CN108175902A (zh) * 2018-03-23 2018-06-19 无锡市人民医院 一种多功能内科护理用输液架
DE102018119426B4 (de) * 2018-08-09 2021-05-12 Logicdata Electronic & Software Entwicklungs Gmbh Verstellbare Hubsäule und verstellbares Tischsystem
EP3981287A1 (de) * 2020-10-06 2022-04-13 USM U. Schärer Söhne AG Hubsäule für ein möbel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL79015C (es) * 1949-10-29
CH664434A5 (de) * 1984-02-20 1988-02-29 Magnetic Elektromotoren Ag Teleskopsaeule mit elektromotorischem antrieb und moebel mit der teleskopsaeule als fuss.
SE511898C2 (sv) * 1998-04-08 1999-12-13 Aake Asplund Teleskoperande anordning samt användning av en sådan anordning som sidostolpe på en lastbärande yta på ett lastfordon
TW364367U (en) * 1998-12-31 1999-07-11 Jeng-Huei Ke Structure of transmission tortion adjustment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026649A1 (en) * 2007-08-30 2009-03-05 Tf Poke Engineering Pty Ltd Jack
AU2008291618B2 (en) * 2007-08-30 2014-09-18 Tfp Engineering Pty Ltd Jack
CN102295243A (zh) * 2011-08-01 2011-12-28 钟婕 一种双向非定距顶抵装置
EP2594156B1 (de) 2011-11-16 2015-02-25 Paul Hettich GmbH & Co. KG Teleskopierbare Hubsäule eines Möbelteils

Also Published As

Publication number Publication date
DE60204493T2 (de) 2006-03-16
ATE297145T1 (de) 2005-06-15
DK1230872T3 (da) 2005-08-15
DE60204493D1 (de) 2005-07-14
EP1230872A1 (en) 2002-08-14
ES2241949T3 (es) 2005-11-01

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