Mechanische vorrichtung zur höhenverstellung von gegenständen

column) for the vertical adjustment of articles, in particular of pieces of furniture, prefers itself from tables, comprehensively in an outer pipe arranged and relative to opposite this adjustable interior pipe, and inside the interior pipe a led, the protection against dumps a supporting element falling at the outer pipe. Modern pieces of furniture, like seat/standing being located in the office, in the workshop, in the household should be höhenverstellbar, so that they meet the requirements modern job. In order to be able to adjust articles, in particular pieces of furniture, with preference/advantage of tables in the height, to become on the one hand stroke columns, which consist into one another retractable pipes of several, uses. On the other hand stroke columns with only Innenund are used an outer pipe for the vertical adjustment by articles. The advantage of a construction with as few a pipes as possible, is the smaller weight, the increased variation options in the drive, and the smaller manufacturing expenditure. Problematic with these constructions it can however be attained as large a stroke as possible without the stroke column becomes unstable thereby. Columns comprehensively Innenund an outer pipe are for example well-known from DE 19533934CI, DEI9626854AI and DEI9626855AI. The stability of the stroke column is ensured to a cage-led antifriction bearing arrangement in the maximally driven out condition by a guiing device of the interior pipe. This guiing device prevents a maximum driving out length of the interior pipe however at the same time. This is that length, with which the interior pipe is pulled out of the outer pipe almost over its entire length, and thus Innenund outer pipe only minimum in axial direction overlap themselves. For the reaching of the maximum driving out length suggests DEI9920935AI the use inside the interior pipe lying, adjustable, and supporting element supporting underneath the interior pipe at the outer pipe. The supporting element is arranged in such a way thereby in the maximally driven out stroke column that it is to extend in downward approximately of equal length into the outer pipe and upward outside of the outer pipe in the interior pipe. Critically with this construction however that no defined and safe delimitation of the Verfahrweges of the supporting element is present, there itself the position of the supporting element is due to the Reibverhä! tnisse between the supporting element and the outer pipe devoted is. Due to manufacturing fluctuations and wear most different friction conditions can result, which make a predefinableness more difficult of an upper retaining position of the supporting element at least. If such a delimitation of the Verfahrweges is missing, so that the supporting element can be drawn by the interior pipe along its entire Verfahrweg upward, then no stability can be achieved against tilting with the supporting element. DEI9920935AI reveals the support as possible spacer delimitation! of the ementes at the ground condition foot, within the outer pipe fastened tension member, for example a bar or a pipe. This well-known device is however because of the tension member sowoh! regarding the constructional expenditure, and regarding the assembly complex. The invention is the basis from there the task, a gattungsgemässe device for the vertical adjustment by articles, in particular from pieces of furniture, preferentially from tables training despite constructionally if possible small an expenditure with good tilt safety a large maximum driving out length of the displaceable pipe permitted. This is reached during a device of the kind initially specified by the fact that at the interior extent of the outer pipe an attack is intended for the delimitation of the Verfahrweges of the supporting element, and that the interior pipe is arranged at least in the range of its lower end, preferably at its entire extent, with distance to the outer pipe. When driving the interior pipe out the supporting element with upward is drawn, so far, until the supporting element meets to the attack, and thus in its end position one fixes. Since the interior pipe is arranged in the range of its lower end and in the range of the attack with distance to the outer pipe, it can away-drive over the attack for the supporting element. It is reached that the interior pipe can drive out nearly along its whole length from the outer pipe, so that in fully taken off condition, the interior pipe and the outer pipe only minimum to overlap itself. In this position maximum tilting forces and/or moments the interior pipe, which can lead to tilting the interior pipe in the outer pipe, affect. These tilting forces and/or moments are then taken up by that, in the maximally driven out position of the interior pipe, at the attack fixed supporting element. Thus the stability of the column is ensured in the final position of the stroke column. Due to the training according to invention knows the maxima! possible driving out length of the interior pipe nearly its entire length achieve, and the stroke column is nevertheless still stable. In a preferential execution form of the invention the attack can be for the delimitation of the Verfahrweges the supporting element a camp for the guidance of the interior pipe, preferably a camp between Aussenund interior pipe. In a further preferential execution form of the invention it can concern with the camp a sliding bearing. In addition, conceivably other camps are, as for example rolling member arrangements. The camp preferably extends from the upper end of the outer pipe toward to its lower end and has a length of at least a third, preferably at least half, which length of the Aussenrohres0 in a preferential training form of the invention formed wise Aussenund interior pipe, and the camp, not circular, with preference/advantage V-shaped ones, cross sections up, so that a turningfirm storage of the interior pipe in the outer pipe results. In a further preferential training form of the invention, the camp can be a V-guidance, which fastened, to the outer pipe, V-rails enclosure, along which V-shaped surfaces of the interior pipe can slide. Preferably the camp is upward closed by a cover plate. In a preferential training form according to invention the supporting element can be so trained that it pushes away sliding along an inner surface of the outer pipe. Preferably a guiing device at the outer pipe, fixed at the lower end the supporting element, can fall itself. In a special training form the guiing device exhibits thereby V-shaped surfaces. In order to prevent a tilting of the interior pipe opposite the outer pipe, the supporting element is in such a way arranged in the maximally driven out condition in a further execution form according to invention that at least still half of the supporting element is in the outer pipe. Accordingly this appropriate execution form of the invention is characterised by it that the Verfahrweg of the supporting element is limited, by attack of the supporting element at a lower face of the camp for the interior pipe, whereby the distance corresponds to the face for the upper end of the outer pipe of the overlapping length of the supporting tube with the outer pipe. This form closure supports the admission of the tilting forces and/or moments, which affect the interior pipe, and which to tilting the interior pipe in the outer pipe lead can. In a preferential further training of the invention a guiing device that is fixed at the lower end the supporting element, can train the form closure with the camp. Preferably a guiing device can out, opposite Innenund outer pipe, g! eitfähigem material, for example made of plastic, its. In further training of the invention, an interior guidance can be fixed, some internal camp, preferably an internal sliding bearing, enclosure inside the interior pipe, by which the supporting element is relatively adjustable opposite the interior pipe. Preferably the G points! more eitlager a circular cross section up, and the supporting element is preferably a supporting tube with circular cross section. Favourable way can be drawn the supporting element over this interior guidance when driving the interior pipe out parallel to and inside the interior pipe with upward. In a preferential execution form of the invention a driver can be attached at the supporting element, to which an interior guidance fastens when driving the interior pipe out. The supporting element is then drawn upward together with the interior pipe. Of course it is in principle also conceivable that the driver is attached at the interior pipe. In a preferential execution form of the invention the internal camp and the interior pipe are in such a way trained that the interior pipe can drive out despite form closure of the supporting element with the camp, further upward. This is possible, because the interior pipe is arranged at least in the range of its lower end with distance to the outer pipe, so that it can away-drive at least over the lower end of the camp. In a special execution form of the invention a push pull cable mechanism is used as drive for the vertical adjustment of the stroke column. In further training of the invention two stroke columns according to invention can be connected by a transverse bar. The drive can being installed, like for example a motor operated push pull cable device in or at the transverse bar. Thereby a push pull cable execution is preferred with which the rope length limits the driving out way of the interior pipe. In a preferential execution form of the invention the interior pipe can be so implemented that parallel to the guidance of the rope at the interior pipe a nutförmige, essentially to the longitudinal extending of the interior pipe, is intended recess. In a special execution form of the invention the push pull cables of both stroke columns are switched over a synchronisation mechanism, whereby a synchronisation of both stroke columns can be achieved. In addition, conceivably other drive systems would as for example be, a Spindelantrieb arranged in the outer pipe. A driving motor could be located at the foot of the outer pipe, below the guiing device of the supporting element. In a special execution form of the invention a gas-filled support is attached inside the stroke column, which serves to carry the weight of the supporting element and the interior pipe. Thereby it is possible to ensure with comparatively small funicular forces the vertical adjustment of the device. The invention is more near represented on the basis a schematically represented remark example; show: Fig. 1 a perspective representation of a seat/standing table according to invention. Fig. 2 a partly broken representation of a cutout of one of the telescope-like devices for the vertical adjustment of the seat/standing table of Fig. i. Fig. 3a, b two schematic representations of the function mechanism of the telescope-like device for the vertical adjustment of Fig. 2. Fig. 4 a schematic representation of the function mechanism of a push pull cable-driven seat/standing table with two of the telescope-like devices for vertical adjustment. In Fig. 1 is a perspective representation a seat of a standing table, with a desk top l, which is fixed at two telescope-like stroke columns 2. The stroke columns are connected thereby by a transverse bar 3. Like Fig. , covers the stroke column 1 shows 2 in an outer pipe 4 arranged, and over a camp 5 relatively opposite this adjustable interior pipe 6. the camp 5 enclosure 4 V-rails fastened trained as slider inside the outer pipe, at which V-shaped surfaces of the interior pipe run. The camp 5 is upward closed by a cover plate 7. In the interior pipe 6 and in the outer pipe 4 additionally a supporting tube 8 is attached. Besides a not represented gas-filled support is present for the counterweight in the lower range of the outer pipe 4. The supporting tube 8 is sliding onto inner surfaces of the outer pipe 4 stored over a guiing device 9, which is firmly at the supporting element 8 fixed. In the interior pipe 6 two interior guidance I0, which in each case exhibit a circular camp ii in their center, are fixed. From the two interior guidance I0 is in Fig. 2 only one represented. The supporting element 8 is over this camp! i sliding in the interior pipe 6 led. Between the two interior guidance 10 is not at the supporting element 8 a driver 12, represented, attached. The operational principle of the stroke column according to invention 2 becomes in Fig. 3a and 3b, which represent the two courses of motion possible in dependence of the friction between the supporting element 8 and the interior camps II, shown. In Fig. 3 The supporting element 8 becomes due to a static friction between the interior guidance when driving the interior pipe 6 out! 0 and the supporting tube 8, the latter parallel too and synchronously inside the interior pipe 6, with upward pulled. By contact of the driver 12 with the lower interior guidance! 0 the driver 12 can be intended for the delimitation of the driving out length of the interior pipe. In Fig. 3b is likewise attached between the two interior guidance at the supporting element 8 a driver 12, which is bringable with a movement of the interior pipe 6 against the lower interior guidance i0. The interior pipe 6 drives for lack of adhesion so far alone, without the supporting element 8, upward, until the lower interior guidance fastens I0 on 8 drivers 12 fastened to the supporting tube. Anschiessend is pulled upward the supporting element 8 due to this form closure as well as the interior pipe. In order to prevent a tilting of the device, the supporting element 8 stored over a guiing device 9 sliding along the outer pipe 4 is. The supporting element 8 is in each case so far drawn upward thereby, until the guiing device 9 meets a lower face of the camp 5. The Verfahrweg of the supporting element 8 is limited thereby by a form closure between the camp 5 and the guiing device 9 (pos. delivery at telescope). After the interior pipe 6 regarding its entire extent with distance to the outer pipe 4 is arranged preferably, it can in particularly simple way over the lower end of the camp 5 away-drives (pos. above). Thus a maximum driving out length of the interior pipe 6 is ensured. Tilting the device in this maximally driven out position (pos. above), with which the Innen6 and the outer pipe 4 only minimum overlaps itself, by the supporting element 8, which is at least with half of its length still in the outer pipe 4, one prevents. Fig. a schematic representation of the function mechanism of a push pull cable-driven seat standing table with two of the telescope-like devices points 4 to the vertical adjustment. The push pull cable device lB is mirror-image arranged. On each side it covers a rope drum 14, and two rope 15, 16. The rope runs off above in each case, and becomes over a around! enkrolle 17 downward turned back, where it is fastened at the lower end 18des of interior pipe 6. The other rope 15 runs off down from the rope drum 14, becomes over the Umlenkro!! e 17 upward turned back, and is fastened to the upper end of I0 19 of the interior pipe 6. Both stand for rope thereby under pre-loading. One is not represented in the outer pipe fastened gas-filled support for the reconciliation of the weight of the interior pipe and the supporting element. A not represented engine and transmissions float propel the thereby coupled rope drums 14 with gegeniäufigem in each case direction of rotation. In a direction of rotation the rope 15 pulls the interior pipe 6 upward. In other direction of rotation the rope 16 pulls the interior pipe downward. (I) desk top (2) stroke column (3) transverse bar (4) outer pipe (5) camp (6) interior pipe (7) cover plate (8) supporting element (9) guiing device (I0) interior guidance (II) camp in interior guidance (of 12) drivers (13) push pull cable device (14) rope drum (15) upper rope (16) lower rope (17) Umlenkroile (18) rope end upper rope (19) rope end lower rope