WO1995034232A1 - A height adjustable support device - Google Patents

A height adjustable support device Download PDF

Info

Publication number
WO1995034232A1
WO1995034232A1 PCT/DK1995/000235 DK9500235W WO9534232A1 WO 1995034232 A1 WO1995034232 A1 WO 1995034232A1 DK 9500235 W DK9500235 W DK 9500235W WO 9534232 A1 WO9534232 A1 WO 9534232A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube member
members
tube
support device
height adjustable
Prior art date
Application number
PCT/DK1995/000235
Other languages
French (fr)
Inventor
Ole Michaelsen
Original Assignee
Sibola A/S
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 Sibola A/S filed Critical Sibola A/S
Publication of WO1995034232A1 publication Critical patent/WO1995034232A1/en

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
    • A47B9/04—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/14—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top
    • B25H1/16—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top in 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
    • A47B9/00—Tables with tops of variable height
    • A47B9/04—Tables with tops of variable height with vertical spindle
    • A47B2009/043—Tables with tops of variable height with vertical spindle with means connecting the spindles of the various legs

Definitions

  • the invention relates to a height adjustable support device comprising a guide unit with two mutually telescopically displaceable tube members and a lift unit with a drive mechanism acting on the tube members for the control of the total working length of said members between a first end of the first tube member meant for placement on a firm base and a second end of the second tube member meant for connection with an object suppor- ted by the device.
  • Such height adjustable support devices in particu ⁇ lar in the form of table legs, are known in a multitude of different designs ranging from very simple forms with a relatively small number of fixed positions to more functional, continuously adjustable and perhaps motor driven designs.
  • a height adjustable support device is characterized in that said first tube member is embedded with a low friction internally in said second tube member and with considerable overlapping of the members in the relevant setting range, and that the drive mechanism comprises a third tube member placed within said first tube member and whose one end is connected with said first end of the first tube member in a rotationally locked manner, whereas in the other end of the third tube member, a threaded bushing for a spindle is retained in a rotatio ⁇ nally locked manner, the opposite end of which spindle is coupled to an activation device placed at said second end of the second tube member.
  • the mutually displaceable tube members may in connection with an uneven load absorb a relatively large moment without the easy movability being affected appreciably.
  • the lift unit is further designed in the way that the points of attack for the drive mechanism are removed from each other, the points of attack being placed at the opposite ends of the mutually displaceable tube members, ie. at the bottom end of the internal tube member and the top end of the external tube member, clamping or squeezing of the drive mechanism is avoided such that the full motor performance is at disposal for the lift function.
  • Figs 1 and 2 show two sectional views perpendicular to each other of a first embodiment
  • Fig. 3 shows a view corresponding to Fig. 1 of another embodiment.
  • the guide unit of the support device comprises a first internal tube member 1 embedded in a tele ⁇ scopically displaceable manner and with large over ⁇ lapping in a second external tube member 2 by means of adjustable nylon guides 3 and 4 with very low friction.
  • the tube members 1 and 2 are formed with such a length that in the entire setting range con ⁇ cerned, they have a considerable mutual overlapping.
  • the tube members 1 and 2 may in principle have arbitrary uniform cross section as they may by way of example be formed as square tubes or have circular cross section.
  • the lift unit of .the device comprises a third tube member 5 placed within the internal tube member 1 and connected with this at its bottom end in a rotationally locked manner.
  • a threaded bushing 6 for a spindle 7 which in the shown embodiment is embedded in a spherical bearing 8 at the top end of the external tube member 2 and is coupled to an electric drive mechanism in the form of a gearmotor 9 placed in a box 10 firmly connected with the top end of the external tube member 2.
  • the motor 9 may be supported in the box 10 by means of resi ⁇ lient supporting members 11, 12, eg. of foam rubber.
  • a manual drive mechanism may be used in connection with an operating member, eg. a crank handle, placed outside the box 10.
  • an operating member eg. a crank handle
  • the support device is adapted to simultaneous height adjustment of two support units 13 and 14 by means of a common drive motor 15 which may be placed in connection with one of the two units and be coupled to the other by means of a suitable transmission, .eg., a chain drive 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

A height adjustable support device, eg. a table leg, comprises a guide unit with two mutually telescopically displaceable tube members (1, 2) and a lift unit with a drive mechanism acting on the tube members for the control of the total working length of said members. The first tube member (1) is embedded with a low friction internally in the second tube member (2) and with considerable overlapping of the members in the relevant setting range, and the device comprises a third tube member (5) placed within said first tube member (1) and whose one end is connected with the bottom end of the first tube member in a rotationally locked manner, whereas in the other end, a threaded bushing (6) for a spindle (7) is retained in a roationally locked manner, the opposite end of which spindle is coupled to an activation device (9), eg. a gearmotor, placed at said other end of the second tube member (2).

Description

A height adjustable support device
The invention relates to a height adjustable support device comprising a guide unit with two mutually telescopically displaceable tube members and a lift unit with a drive mechanism acting on the tube members for the control of the total working length of said members between a first end of the first tube member meant for placement on a firm base and a second end of the second tube member meant for connection with an object suppor- ted by the device.
Such height adjustable support devices, in particu¬ lar in the form of table legs, are known in a multitude of different designs ranging from very simple forms with a relatively small number of fixed positions to more functional, continuously adjustable and perhaps motor driven designs.
It is, however, often a problem that during the adjustment movement, a considerable inertia may occur due to friction between the mutually displaceable tube members eg. because of an uneven load which results from adjusting the height of only one table leg at a time.
It is the object of the invention to procure a support device of the said type, by which this problem is avoided or at least reduced considerably and to present a design with such a flexibility that it may be adapted to most existing supporting functions, eg. to working tables, conveying belts, platforms, underframes for machines, etc.
For this purpose, a height adjustable support device according to the invention is characterized in that said first tube member is embedded with a low friction internally in said second tube member and with considerable overlapping of the members in the relevant setting range, and that the drive mechanism comprises a third tube member placed within said first tube member and whose one end is connected with said first end of the first tube member in a rotationally locked manner, whereas in the other end of the third tube member, a threaded bushing for a spindle is retained in a rotatio¬ nally locked manner, the opposite end of which spindle is coupled to an activation device placed at said second end of the second tube member.
As a consequence of the considerable overlapping and the bedding with low friction, which may for instance be obtained by means of adjustable guide members made from a plastic material, eg. nylon or PTFE, the mutually displaceable tube members may in connection with an uneven load absorb a relatively large moment without the easy movability being affected appreciably.
As the lift unit is further designed in the way that the points of attack for the drive mechanism are removed from each other, the points of attack being placed at the opposite ends of the mutually displaceable tube members, ie. at the bottom end of the internal tube member and the top end of the external tube member, clamping or squeezing of the drive mechanism is avoided such that the full motor performance is at disposal for the lift function. The invention will in the following be explained in detail with reference to the drawing in which
Figs 1 and 2 show two sectional views perpendicular to each other of a first embodiment, and
Fig. 3 shows a view corresponding to Fig. 1 of another embodiment.
The guide unit of the support device comprises a first internal tube member 1 embedded in a tele¬ scopically displaceable manner and with large over¬ lapping in a second external tube member 2 by means of adjustable nylon guides 3 and 4 with very low friction. The tube members 1 and 2 are formed with such a length that in the entire setting range con¬ cerned, they have a considerable mutual overlapping.
The tube members 1 and 2 may in principle have arbitrary uniform cross section as they may by way of example be formed as square tubes or have circular cross section. The lift unit of .the device comprises a third tube member 5 placed within the internal tube member 1 and connected with this at its bottom end in a rotationally locked manner. In the opposite end of the third tube member 5 there is retained in a rotatio¬ nally locked manner a threaded bushing 6 for a spindle 7 which in the shown embodiment is embedded in a spherical bearing 8 at the top end of the external tube member 2 and is coupled to an electric drive mechanism in the form of a gearmotor 9 placed in a box 10 firmly connected with the top end of the external tube member 2.
As appears in particular from Fig. 2, the motor 9 may be supported in the box 10 by means of resi¬ lient supporting members 11, 12, eg. of foam rubber. This has the advantage that the box 10 may be integra¬ ted in a carrying or supporting construction for the object to be supported, eg. a longitudinal or trans- versal beam for a working table at the same time as, compared to a fixed anchoring of the motor less strict accuracy requirements may be made of the positioning of the motor in relation to the spindle 7 and of the coupling of the motor to the spindle, a vibration and noise reducing support of the motor is obtained.
Instead of the shown motorized design, a manual drive mechanism may be used in connection with an operating member, eg. a crank handle, placed outside the box 10. In the embodiment in Fig. 3, which corresponds to the embodiment in Figs. 1 and 2, the support device is adapted to simultaneous height adjustment of two support units 13 and 14 by means of a common drive motor 15 which may be placed in connection with one of the two units and be coupled to the other by means of a suitable transmission, .eg., a chain drive 16.

Claims

C L A I M S
1. A height adjustable support device comprising a guide unit with two mutually telescopically displaceable tube members (1, 2) and a lift unit with a drive mecha- nism acting on the tube members for the control of the total working length of said members between a first end of the first tube member (1) meant for placement on a firm base and a second end of the second tube member (2) meant for connection with an object supported by the device, characterized in that said first tube member (1) is embedded with a low friction internally in said second tube member (2) and with considerable overlapping of the members in the relevant setting range, and that the drive mechanism comprises a third tube member (5) placed within said first tube member (1) and whose one end is connected with said first end of the first tube member (1) in a rotationally locked manner, whereas in the other end of the third tube member (5) , a threaded bushing (6) for a spindle (7) is retained in a rotatio- nally locked manner, the opposite end of which spindle is coupled to an activation device (9) placed at said second end of the second tube member (2) .
2. A height adjustable support device according to claim 1, characterized in that the activation device comprises a gearmotor (9) situated in a box (10) connected with said second end.
3. A height adjustable support device according to claim 1 or 2, characterized in that said gearmotor (15) constitutes a common activation device for two suppor- ting units (13, 14) .
4. A height adjustable support device according to claim 2 or 3, characterized in that said gearmotor (9, 15) is supported in the box (10) by means of resilient supporting members (11, 12) .
PCT/DK1995/000235 1994-06-14 1995-06-12 A height adjustable support device WO1995034232A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0679/94 1994-06-14
DK67994A DK67994A (en) 1994-06-14 1994-06-14 Height adjustable support device

Publications (1)

Publication Number Publication Date
WO1995034232A1 true WO1995034232A1 (en) 1995-12-21

Family

ID=8096302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000235 WO1995034232A1 (en) 1994-06-14 1995-06-12 A height adjustable support device

Country Status (2)

Country Link
DK (1) DK67994A (en)
WO (1) WO1995034232A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1004362C2 (en) * 1996-10-25 1998-04-28 Stichting Vakraad Voor De Meub Device for movably positioning a workpiece for machining.
WO1999063863A1 (en) * 1998-06-09 1999-12-16 The Meat Industry Research Of New Zealand Improvements in mechanisms for height adjustment
WO2002039848A1 (en) * 2000-11-17 2002-05-23 Linak A/S Linear actuator
EP1479312A1 (en) * 2003-05-19 2004-11-24 VS Vereinigte Spezialmöbelfabriken GmbH & Co. Sidepiece for a table - or worktop frame
CN102639030A (en) * 2009-11-28 2012-08-15 利纳克有限公司 Linear actuator
TWI391213B (en) * 2009-03-20 2013-04-01 Fih Hong Kong Ltd Adjustable holding mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR948241A (en) * 1946-06-22 1949-07-26 Embru Werke Ag School or work table
DE1183652B (en) * 1959-11-12 1964-12-17 Skrivrit Ab Adjustment device for furniture, especially for school furniture
DE2020145A1 (en) * 1970-04-24 1971-12-23 Ostertag Werke Ag Table with a height-adjustable worktop
WO1987006439A1 (en) * 1986-04-23 1987-11-05 Televerket Desk comprising a desk top that is vertically adjustable within a great range
SE468875B (en) * 1991-12-27 1993-04-05 Funco Inredningar Ab Telescopic pillar, such as a table leg

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR948241A (en) * 1946-06-22 1949-07-26 Embru Werke Ag School or work table
DE1183652B (en) * 1959-11-12 1964-12-17 Skrivrit Ab Adjustment device for furniture, especially for school furniture
DE2020145A1 (en) * 1970-04-24 1971-12-23 Ostertag Werke Ag Table with a height-adjustable worktop
WO1987006439A1 (en) * 1986-04-23 1987-11-05 Televerket Desk comprising a desk top that is vertically adjustable within a great range
SE468875B (en) * 1991-12-27 1993-04-05 Funco Inredningar Ab Telescopic pillar, such as a table leg

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1004362C2 (en) * 1996-10-25 1998-04-28 Stichting Vakraad Voor De Meub Device for movably positioning a workpiece for machining.
EP0838311A1 (en) * 1996-10-25 1998-04-29 Constructiebedrijf Willems B.V. Apparatus for movably mounting a workpiece
WO1999063863A1 (en) * 1998-06-09 1999-12-16 The Meat Industry Research Of New Zealand Improvements in mechanisms for height adjustment
WO2002039848A1 (en) * 2000-11-17 2002-05-23 Linak A/S Linear actuator
EP1479312A1 (en) * 2003-05-19 2004-11-24 VS Vereinigte Spezialmöbelfabriken GmbH & Co. Sidepiece for a table - or worktop frame
TWI391213B (en) * 2009-03-20 2013-04-01 Fih Hong Kong Ltd Adjustable holding mechanism
CN102639030A (en) * 2009-11-28 2012-08-15 利纳克有限公司 Linear actuator

Also Published As

Publication number Publication date
DK67994A (en) 1995-12-15

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