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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
  • F16B7/10—Telescoping systems
  • F16B7/14—Telescoping systems locking in intermediate non-discrete positions

Definitions

• the present invention relates to an arrangement for a telescoping tube -which is formed by an inner metal profile rail accommodated in such a way that it is guided inside an enclosing outer metal profile rail with interjacent rolling devices and guide means.
• a telescoping tube is used, for example, to permit the supporting of furniture such as tables to permit adjustment readily to desired height positions
• sliding heels have been utilized in previously disclosed solutions as a means of guidance and free play elimination between the telescoping tubes.
• the resulting friction has obliged the application of force in the downward direction, too.
• the aforementioned sliding heels also have a tendency to "stick” if a fairly long period of time elapses between adjustments, which requires the use of an over-dimensioned motor in order to initiate a setting to a new position.
• the principal object of the present invention is thus, in the first instance, to solve the aforementioned problems and, at the same time, to provide a construction from which free play is absent and which automatically eliminates variations in tolerance in the production phase.
• the aforementioned object is achieved " by,.means of an arrangement in accordance with the present invention, which is characterized essentially in that the aforementioned outer metal profile rail is so arranged, by the application of a force at an angle to its longitudinal extent, as to expand in a sprung fashion in order to accommodate the inner metal profile rail and the aforementioned rolling devices and, in so doing, to permit the rails to be displaced relative to one another in the absence of friction and free play.
• Figs . 1 and 2 show an outer tube and an inner tube in a telescoping assembly in accordance with the invention viewed in perspective at an angle from its one end;
• Fig. 3 shows the aforementioned telescoping assembly viewed in perspective in an assembled and partly extended position
• Fig. 4 shows a sectional view of an assembled telescoping assembly
• Figs. 5 and 6 show a telescoping assembly in a position in use with a table, and with the telescoping assembly respectively fully extended and fully retracted;
• Fig. 7 shows a sectional view of a fully retracted telescoping assembly
• Fig. 8 shows constituent rolling devices and holders for a telescoping assembly, shown here respectively as a side view, an end view and separate;
• Fig. 9 shows in detail a deflection component contained in the telescoping assembly with a combined load relief lock
• Fig. 10 shows a longitudinal cross-section through a telescoping assembly in the fully extended position
• Fig. 11 shows a holder for the rolling device for a telescoping assembly in perspective
• Figs. 12 and 13 show the principle for the assembly of a telescoping assembly, whereby the outer telescoping tube is caused to expand by compression so that the rolling device an the inner telescoping tube can be introduced therein;
• Fig. 14 shows an alternative of a telescoping arrangement viewed in a section respectively across the tubes and in the assembled position;
• Fig. 15 shows a further alternative of a telescoping arrangement respectively as the components referred to and assembled
• Fig. 16 shows a sectioned view of yet a further example of a telescoping arrangement
• Fig. 17 shows constituent parts thereof;
• Fig. 18 shows an example of a unilaterally actuated outer tube for a telescoping arrangement;
• Fig. 19 shows an example of an alternative application for the principle with a sprung outer profile and the assembly procedure utilized therewith.
• the principal idea of the present invention is, when one of a pair of specially designed telescoping tubes is subjected during assembly to a force which acts at an angle to the longitudinal extent of the telescoping tube, for this to change the effective surface extent of the telescoping tube.
• This permits the rolling device to be introduced between the inner and outer telescoping tubes, which then form an easily moved telescoping unit from which free pla is absent.
• the construction also means that relatively large plus and minus tolerances in the dimensions of the telescoping tubes are compensated for automatically without any disadvantages in the function.
• the invention comprises an arrangement 1 for at least two telescoping tubes 2, 3 interacting with one another, which are formed from an inner tubular metal profile rail 3 which is accommodated in such a way that it is guided by an enclosing outer metal profile rail 2 and with rolling devices 4 in the form of balls 4A and/or rollers 4B and/or wheels 4C situated between them.
• the aforementioned outer metal profile rail 2 is so arranged as to be caused to expand in a sprung fashion and to increase its effective width B by the application of a force F in a direction at an angle X to its longitudinal extent 5, thereby permitting the introduction of the inner profile rail 3 and the roller/ball guide 27, 4 acting between them.
• at least one broad side 6, 7 of the outer metal profile rail 2 is so arranged as to expand in a sprung fashion in a direction laterally outwards 8, 9 towards the short sides of the aforementioned profile rail 2, in the event that the profile rails 2, 3 exhibit rectangular form or some other asymmetrical form.
• Fig. 18 shows how only one side 6 of the outer profile 2 is arranged in such a way that it expands sideways 8, 9 while the other side 7 1 is so executed as not to expand.
• the aforementioned outer profile rail 2 can be formed, as in the example shown in Figs. 4, 14, 16 and 17, from pairs of welded 11 sprung sheet metal profiles 12, 13.
• the inner profile rail 3 can also be produced in the same way.
• a straight, a curved, an angled or an inclined short side component 19, 18 extends from the respective centre 14., 15 of the two short sides 16, 17 of the outer profile rail, which components are in turn transformed into a broad side component 20, 21 extending at a small angle of inclination, which come together at a centrally located angled part 22 where the force F is intended to be applied to cause the outer telescoping tube to expand and, in so doing, to be permitted to be displaced in relation to the inner telescoping tube.
• the outer profile rail 2 is essentially identical viewed in a direction towards the respective broad side 23, 24.
• each outer profile rail 2 expands at the centre 25, 26 of the respective broad side 23, 24.
• an aforementioned outer metal profile rail 2 1 is pretensioned in such a way as to extend in a direction inwards towards the inside of the centre of the rail assembly formed by the inner metal profile rail 3 1 and the outer profile rail 2 1 .
• the inner profile rail 3 can, as shown in Fig. 14, exhibit angled recesses 30 in the corners of the aforementioned rail 3 for accommodating the rolling devices.
• the aforementioned inner metal profile rail 3 exhibits an inwardly bent recess part 31 at its respective centrally located area on the respective broad side for reinforcing purposes.
• the assembly procedure is described by the following mechanism:
• the clamping jaws 32 and 33 are pressed towards one another in the direction of the arrows, in conjunction with which, the closed outer profile 2 is caused to expand in a lateral direction 8, 9 so that the inner profile 3 and the balls 4 and ball holder 27 can be installed.
• the sprung material in the outer profile 2 returns when the clamping pressure is removed to a position in which the guiding balls 4 are in contact under spring pressure with both the inner and the outer profiles 3, 2, which totally eliminates any free play and yet permits the profiles 2, 3 to slide easily longitudinally inside one another.
• a table 34 to which the invention is applied Shown in Figs. 5 and 6 is a table 34 to which the invention is applied, which is illustrated here with the table fully raised and fully lowered.
• the detailed telescoping mechanism is shown in greater detail in Figs. 7 and 9-11, where a line, belt or other drawing means 35 connects together the two metal profile telescopes 2, 3, which are extensible relative to one another.
• One end 35A of the drawing means 35 is wound around a rolling shaft 36, which is motor-driven or hand-driven via a self-braking gear arrangement or a locking device (not shown) for the purpose of winding in or winding out the drawing means 35 on the aforementioned rolling shaft 36.
• the other end 35B of the drawing arrangement 35 is attached to the outer metal profile rail 2 .
• a deflection arrangement 37 preferably in the form of a rotating roller or a wheel, is supported at the inner/lower end 3A of the inner rail 3.
• the aforementioned roller, etc., 37 is supported by a pivoting arm 38 mounted about a shaft 38B which is attached to the inner rail 3.
• the aforementioned arm 38 is caused by a spring 39 to pivot the arm a downward direction so that its opposing cam-shaped end 38C engages with and locks the inner rail 3 against the outer rail 2 when the line 35 is released, which occurs if, for example, you lift the table top as illustrated in Figs. 5, 6.
• the invention is not restricted to the illustrative embodiments described above and illustrated in the drawings .

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• Bearings For Parts Moving Linearly (AREA)

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Cited By (4)

Citations (7)

• 2000
  • 2000-01-18 SE SE0000134A patent/SE0000134L/sv not_active Application Discontinuation
• 2001
  • 2001-01-17 WO PCT/SE2001/000070 patent/WO2001052700A1/en active Application Filing
  • 2001-01-17 AU AU2001228973A patent/AU2001228973A1/en not_active Abandoned

Patent Citations (7)

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