DE6605402U - NON-ROTATING TELESCOPIC BASE FOR FURNITURE - Google Patents

Description

Applicant: _ '·, - .. Lud wigshaf en / Eh. , February 12, 1970

Ilse-Werke ü (i.. · -, ... ° ·. · '.. R> _v

Uslar / HahnJ ''. '·· "' .. ·· GM note: ·" ·. J-13 366/34-i Gbm

Pen street. Λ-2 "." ■ ■ ·. '■. '. ■ '■:. · · "".' ■ .. "'. ■. ■:

Representative: '·'"· - · ■. · ■ · -.- ■ ·. ··· ■

Patent Attorneys ·. . ·· . \ R ··. '
.Dipl.-Iiig, -Adol'f H. Fischer ', ι'. '
Dipl.-Ing. Wolf-Dieter Fischer
Ludwigshafen am Rhein '' ¹ . · · -
Eichard ^ Wagner-Strasse 22- ·. '· ■. "

/ Non-rotatable! Deleskopffuß for Möfrel J)

,. The invention relates to a non-rotatable;

Telescopic foot for furniture, especially as a support leg>

od for height-adjustable tables and chairs. like. serves \ and insinandergeführten essentially of two pipes
with a polygonal cross-section, between which. . ,:

"friction-reducing" rolling elements are arranged and that \

is provided externally actuatable \ 'braking device inside the tubes a. '· "- · j.

Such a telescopic base is, for example, by. -; · . German utility model 1 867 557 became known at. ■ ■:

arranged as a friction-reducing "rolling element balls;

are, which in one between the two into each other- f

guided tubes arranged bush are supported. .

This camp is loosely between the interlocking; ^:

led pipes provided so that there is between the two ]

• in j. -k mn ..nrl SAutianiDrl is the last one submitted; it wiwcht from the V - HIKWEIS: This document (description ^u "? = ~ ^ ₁ ? ΤΓιιΛ *, _ιιηο the deviation has not been checked

Pipes is not supported and any "f

Can take up position, mainly at the bottom of the |

Foot. .-The guidance of the foot is therefore not sufficient, | This is particularly the case with tables or the like for special purposes, e.g. with equipment for laboratories or medical treatment rooms proves to be disadvantageous,

since the movement tolerances in some cases the ver. ./;

Very restrictive phrase. Attempts have also been made to remedy this disadvantage by replacing the bearing · ^ "ϊ

between the nested pipes under pretension :} \

has used (Austrian patent specification 219 790) = . '}

In all of these cases, however, it has been found

that after some time as a result of the point formation:

position of the balls on the moving against each other. Share xornjünderungsarbeit is done * This works in particular that deep grooves or ball impressions are formed on the tubes due to the pressure of the balls train, so that an exact guidance of the foot parts is already lost after the course. the individual ball impressions on the pipes are mainly due to the locking devices used generated, which are generally designed as a simple adjusting screw or as an eccentric lever and when actuated exert unilateral pressure on the inner tube so that the inner tube is tilted. By US Pat. No. 2,643,143 has become known a locking device in which a centrically arranged brake wedge is proposed, which is to serve · to absorb particularly high pressures, such as such pressures arise in girders in construction. If you wanted to use such a device on furniture, then there would be: the disadvantage is that already

■ * ■ III tt · tt Zj /

- 3 - ^ - <o

with lower loads, as is always the case with furniture, and the then required large ones

Wedge angle, the brake shoes slip through. Conversely, however, with larger loads on a lever that has to be used to release the lock, very large forces act, so that then with a piece of furniture, for example a table, the hand force is not sufficient to operate such a lever. In addition, the necessary high load pressure can cause the pipe to expand, which on the one hand makes it difficult to release the brake y and on the other hand destroys the ability of the two pipes to slide into one another.

The present invention is therefore based on the object of proposing a non-rotatable telescopic foot for furniture that is to be used wherever precise guidance over the entire extension length is important and a lock that is independent of the size of the load and that does not damage the as xjo.uxxj.auu £ vi.j.SiiGiivxGH x ^ OxxrwÄTivls VGiMijTsscij. u, gej.Gru.eri / wxru. and thus precise guidance of the individual parts is maintained even after prolonged use.

The object is achieved according to the invention in that in At least one roller bearing is inserted under preload into the cavity between the two tubes, wherein its rollers are arranged offset on two opposite surfaces of the inner and outer tubes are and furthermore there is always one role less on one side than on the other and that the end of the Inner tube is slotted and brake shoes are attached to the flat tabs formed thereby, with within of the lower end of the Yierkant inner tube

-A-

Ball bearing basket with four in the diagonals of the

p square inner tube held balls arranged is and the balls are between a at the lower end of an internal actuation.

) i rod provided truncated cone and the corners of the. Hold the square inner tube.

The roller bearing transmits the sliding movement from the inner to the outer tube via the one in this pail • largest possible linear system. By having the

Marks rolls with an oversize and prefixes them with «» · I pushes voltage into the outer tube, there is an I "clearance between the fixed outer tube and the

displaceable inner tube avoided, because the on— ^:. Any work of change in shape that occurs stresses the outer tube only within the elastic limit, whereby ". · I no flexing work occurs, as it is unavoidable in the case of the point-shaped contact when balls are used. This also prevents any permanent deformation that is not present in the known devices

I an exactly L during a long period of use

I play-free guidance of the height-adjustable \

I. Interior robes. The special training of the Peststell- '''.

I device supports the task set by. jf! tilting of the inner tube due to pressure on one side - I- 4 I.

I is avoided and the same puncture of the inner 1

I received the tube opposite the outer tube in the oedem Palle - -. ι

'.' . remains, which is particularly beneficial when solving the '.

I Peststellvorrichtung affects, being through, the roll .. "|;

j 'friction of the -existing balls the danger of a.

= - Frictional engagement is avoided. ';

660

The invention is based on an exemplary embodiment

explained in more detail " ^:

It show, in schematic sketches,

Pigur 1 a longitudinal section through a bulge) - j

pillar, . ·

Pigur 2 a section along line -4-A in Pigur 1,

Pigur 3 "is a pictorial representation of a

Roller basket and · I

Pigur 4 shows a section along line I-B in Pigur 1. ■

In the example shown in Figures 1 and 2
a square tube is used as the outer tube 1, which
is firmly connected to a stand 2. Within
The outer tube 1 is a sliding inner tube 3 ^:

arranged, which, for example a flattened ^P.undrchr:

as shown, can be or also a square *
tube, the upper end of this inner tube 3 the. ι |

Furniture upper part, a table top 4 or the like. Can carry. i

In the space between the tubes 1 and 3 is a
Arranged roller bearings 5, which consists of a roller bearing cage and perpendicular to each other arranged pairs of rollers which are arranged in several layers one above the other, if necessary, how to take from 1 to Pigur corresponds \.
The same arrangement can easily be made then
meet if hexagonal or octagonal tubes are used or if the outer tube is also a flattened round tube or possibly a flattened oval tube. The sliding movement is caused by the roller bearing 5

05402

between the "two tubes 1 and 3 via a very large linear system, with the lumps 6 are oversized and the roller bearing 5 is preloaded into the outer tube 1 is inserted.

In Figure 3, the roller bearing cage is shown for only three zigzag rolls, as shown by the there provided recesses 5 'indicated. Such a roller bearing cage can be made of metal or plastic be made; In the case of plastic, the slots for the rollers can be made in a flat film and work in the four creased edges, after which the film is easily shaped into a square basket can be.

The inner tube 3, which can be moved vertically, should be lockable at any desired height. By doing In the illustrated example, the lower end of the inner tube 3 is slotted, with four brake shoes 7 there are attached, which slide on the inside of the outer tube and can lay there. This mooring of the brake shoes 7, which are attached to the inner tube outer surfaces are releasably fixed, can be done, for example, by the actuating device shown in Figure 1, an expansion cone 8 with the help of the four balls 9 exerting an outward pressure on that of his End in the edges slotted tube 3 exerts. The actuation is made possible by the fact that the cone seated on a guided in the interior of the tube 3 actuating rod 10, which with the help of a handle 11, the is provided below ^ the table top 4 or the like, can be moved. This allows the brake shoes

86 0540

In any "arbitrary height position of the Trmenrohges force fit against the inner surface of the outer tube -warden, because the four balls 9 are ^{guided in a Eugellagerkorb 9 1} so that they are always in the most favorable * position for the action, namely in the corners of the inner tube .

Claims (8)

- 8 Schutζans oracles 1) light-rotatable telescopic leg for furniture, in particular as a support leg for height-adjustable tables and chairs or the like and essentially made of two interconnected tubes with a polygonal Cross-section, between which friction-reducing rolling bodies are arranged and that an externally actuatable braking device is provided within the tubes, characterized in that at least one roller bearing (5) is inserted under pretension in the cavity between the two tubes (1,3), its Rollers are arranged offset on two opposite surfaces of the inner (3) and outer tube (1) and furthermore there is always one less role on one side than on the other and that the end of the inner tube (3) is slotted and on the thus formed flat flaps brake shoes (7) are attached, with a ball bearing ^{cage (9 1} ) with four balls (9) held in the diagonals of the square inner tube (3) being arranged within the lower end of the square inner tube (3) and the balls ( 9) between a truncated cone (8) provided at the lower end of an internal operating rod (10) and the corners of the square pin Hold the en-tube (3). 2) extension column according to claim 1, characterized in that the roller bearing (5) consists of a roller bearing cage and rollers (6) loosely held ^{in corresponding recesses (5 1) of the cage on the flat surfaces of the tubes (1,3).} G 3) Ausschubsäule according to claim 1 and 2, marked by f. Characterized in that the rollers (6) in a plurality of layers are provided one above the other, possibly in separate storage baskets. 4-) Extension column according to claim 1 to 3? characterized by this-] draws that the roller bearing cage from a plan with ■ Cutouts provided plastic film or the like. I, which is connected to the square socket housing (3) via I incorporated kink edges. I. 5) extension column according to claim 1 "characterized I that to operate the lifting mechanism an inside I of the pipes (1,3) built-in energy storage is provided I, if necessary, the energy storage device itself as a braking I facility can serve. i 6) extension column according to claim 1 to 5, characterized in that that on the operating rod (1O) one under the upper part of the furniture or /. the table top (4-) or the like attacking handle (11) is provided, j which is used to move the rod (lO). J 7) extension column according to claim 1 to 6, characterized ; shows that the inner surface of the hollow column (1) and the outer surface of the inner tube (3) flattened < Have round or oval profiles, with the flats facing each other. 8) Aasschubsäulc according to claim 1 to 7, characterized in that there; the rollers (6) with an oversize for ♦ Generate 6 pretension.