DE10030919B4 - Dismountable profile tube frame and table system with such a profile tube frame - Google Patents

Abstract

Collapsible profile tube frame for carrying at least one table or worktop (20), with profile tubes (1, 2), the end regions of which are adapted to one another to form profile tube rails and which can be detachably connected to one another in the region of the profile tube rails by means of a tensioning device (22), the Clamping device is designed so that in the assembled state of the profile tubes (1, 2), at least in the inner angle region (21) of the profile tube corner, no connecting element of the tensioning device projects significantly beyond the common outer contour of the profile tubes (1, 2), characterized in that the tensioning device (22 ) has at least one insert element (12) which, when the profile tube corner is assembled, is arranged essentially inside the profile tubes (1, 2); the insert element (12) has V-shaped guide projections (13) which are provided for engaging in wall recesses (11) of the profile tubes (1, 2), which are aligned transversely to the longitudinal axes of the profile tubes in the end region of the profile tubes (1, 2) are; and the profile tubes (1, 2) in their end region have complementary engagement sections (8) with projections and / or recesses which ...

Description

The invention relates to a collapsible profile tube frame for supporting at least one table or worktop in a table system, and a table system with at least one such profile tube frame.

Dismountable profile tube frames are constructed with the aid of a plurality of profile tubes and have profiled tube corners, in the region of each of which two profile tubes lying essentially in one plane are aligned at an angle to one another. For example, tables are known whose table legs are connected to each other via profiled tubes formed by trusses or frames. From the DE 19 47 289 A a profile tube frame for furniture frames is known in which the profile tubes in the corner with a lying between the ends of the profile tubes a frame by means of a clamping device with a screwed to the frame and positively connected to the profile tubes corner piece are releasably connected to the profile tubes when tightening clamping screws pull firmly against the frame foot. The triangular or angular corner piece engages over the inner angle region of the profiled tube corner and has hook-shaped projections on its outer sides facing the tubes to be braced, which engage in corresponding recesses on the inner sides of the profile tubes to be braced.

Another collapsible profile tube frame, which is suitable for example for carrying shelves, is in the DE 298 22 650 U1 shown. This has in one embodiment round tubular profile tubes whose end portions are adapted to each other in the manner of a miter, that in the region of a profiled tube corner by means of a clamping device, the loose profile tubes in one step both with each other, as well as with a support profile can be firmly clamped. The clamping device provided for this purpose has an inner angle region spanning flat iron with bent end portions which protrude through recesses on the inner sides of the tube profiles in the interior of the profile tubes and engage behind the inner edges of the recesses. When tightening a flat iron in the plane of the bisector by cross-clamping screw which engages in a thread in the wall of the support tube, the profile tubes are axially pulled towards each other and towards the support tube and clamped.

Dismountable profile frame have over finished frame, for example, welded together profile tubes have the advantage that they occupy little space during storage and transport. However, it may be difficult to construct the profile tubes and the clamping devices so that the frame on the one hand are easy to install and on the other hand, in the assembled state have sufficient stability for the intended use stability. So z. As in table systems for conference tables or office tables special requirements for stability and rigidity of the frame structure against wobbling and vibration movements. In addition to these functional requirements, the needs of buyers for visually appealing solutions, especially when, for example, transparent tabletops are to be used, which allow a view of the underlying support structure increasingly.

The US 4 039 133 A discloses a profile tube frame for a table or worktop whose profile tubes are mitred in their end regions so that they can abut one another substantially at right angles. The profiled tube corner thus formed is inserted into a recess of a support leg and fixed in height. In addition, a multi-part, angular insert element is provided in the support leg, which is screwed in the outer angle region of the profiled tube corner to set the two profile tubes in their mutual position and to hold in the support leg.

Next describes the DE 1 429 658 A a frame with vertical posts and transverse and longitudinal beams. The end portions of the transverse and longitudinal members designed as profiles are mitred so that they can abut one another substantially at right angles. A clamping device has an insert block which has a profile on which the transverse and longitudinal members can be slid under clamping action in order to fix these carriers in their mutual position. These insert blocks are then screwed from the outside angle range with the vertical posts.

From the US Pat. No. 3,195,196 A is a collapsible profile frame is known in which the profiles are mitred in their end regions in order to be able to abut. The profiled corner thus formed is inserted into a recess in a support leg and held together by two blocks which can be screwed together from inside and outside. On an attachment of the joined profile corners is omitted in this case.

The invention has for its object to provide an improved demountable profile tube frame for carrying at least one table or worktop. In this case, an aesthetically pleasing, collapsible profile tube frame is to be created. Preferably, the profile tube frame should be quick and easy to install and guarantee sufficient for use in office or conference tables stability.

To solve this problem, the invention proposes a collapsible profile tube frame with the features of claim 1 and a table system with the features of claim 19 before. Advantageous developments are specified in the dependent claims.

An inventive profile tube frame has profile tubes whose end regions are adapted to one another to form profiled tube corners. For this purpose, the end faces of the profile tubes which face one another in the corner area preferably have a design which makes it possible for the tube walls to merge into one another over at least part of their circumference to form a more or less wide butt joint, so that a common outer contour can be created. A clamping device for the detachable connection of the profile tubes in the region of the profiled tube corners is designed such that in the assembled state of the profile tubes, at least in the interior angle region of the profiled tube corner, no connecting element of the clamping device projects substantially beyond the common outer contour of the profile tubes. So there are provided largely or completely concealed fasteners that it u. a. allow to create a corner joint without the conventional, cross-cornered cross braces or angle known clamping devices. Thus, especially the inner corners have an aesthetically pleasing, clean appearance, which may be similar to a welded joint, as there are no substantially outwardly projecting beyond the pipe circumference parts.

Such corner joints are particularly suitable for tables or other furniture in which the Inneneckbereiche of frame racks are visible, for example, in tables with transparent table tops, z. B. made of glass. Particularly preferred embodiments are those in which also at the top and / or on the underside of the profiled tube corner none of the connecting elements projecting beyond the profile tubes common outer contour substantially; whereby an optical impression of an immediate transition between the pipes or the impression of a "clean" profiled pipe corner is promoted.

To promote a clear, functional shaping of the profiled pipe corners, it is preferably provided that the end regions of the profiled pipes intended for forming a profiled pipe corner are essentially mitred, which is understood here to mean that the pipe walls are beveled and structured in their corresponding end region the ends of composite tubes can approach each other largely, with possibly a more or less wide butt joint may remain. According to the invention, it is provided that wall sections project through an imaginary miter surface and partially engage with one another in a form-fitting manner, which can serve to stabilize the joint against relative displacement and twisting of the profiled pipe ends and will be explained later. In order to produce suitable, partially complex tube wall geometries with axially and / or in the other direction extending projections and / or recesses in the tube end region, the end regions of the profile tubes can be structured by any suitable material processing or separation technique. In preferred developments, the end portions of profile tubes are structured in opposite directions, so that both ends of a profile tube can equally be used for a corner joint with another tube. As a result, the assembly of profile tube frame is much easier.

The clamping device further comprises at least one insert element, which is arranged in assembled profile tube corner substantially in the interior of the (merging) profile tubes. The insert element has expedient outer surfaces which are at least partially adapted to the inner contour of the surrounding profile tubes in terms of position, shape and / or orientation such that the profile tubes inevitably largely arranged in the correct position relative to one another with inserted insert element and / or against relative movement, for. B. twist around their respective longitudinal axis are positively secured. For example, the profile tubes with their open tapered end portions laterally, d. H. essentially parallel to the plane defined by the profile tubes plane or transversely to the longitudinal axis of the profile tubes, be plugged onto the insert element. According to the invention, the insert element has V-shaped guide projections, in particular in the form of guide rails, which are provided for possibly largely play-free engagement in wall recesses of the profile pipes to be connected to each other. The wall recesses are formed in the end region of the profile tubes transversely, in particular substantially perpendicular to the longitudinal axis of the respective profile tube.

The guide projections support a correct lateral attachment of the profile tube ends on the insert element. They also ensure by their alignment transversely to the tube longitudinal axis that the deferred, but possibly not yet clamped tubes in the longitudinal direction can not slip off the insert element. If, during clamping of the profile tubes, the insert element is then tensioned, for example toward the outer corner, in a clamping direction between the legs of the V, clamping of the profile tubes parallel to their longitudinal direction in the direction of one another is achieved by the engagement of the guide projections in the wall recesses.

To the acting on the pipe ends insert element a z. B. to produce the external corner of the corner joint clamping force, the clamping device preferably has an addition to the profile tubes provided, separate corner element and clamping means for clamping the insert element and the corner element with the attacking profile tubes. The clamping means preferably comprise at least one clamping screw. A single clamping screw can be sufficient and allow low-cost and quick to install versions. Preferably, several, in particular two perpendicular to the profiled corner plane spaced clamping screws are provided. As a result, the insert and the corner element, as soon as the clamping screws are screwed into the provided for them, preferably the corner element associated thread, positioned largely correct position and secured against rotation.

As a corner element, for example, serve a preferably tubular support member, which is normally aligned perpendicular to the profile corner plane. In order to obtain a sufficient for the clamping forces occurring engagement depth for clamping screws, can be provided inside the tube, for example, a semi-cylindrical, solid insert, in which the threaded holes are mounted. In this case, the corresponding wall recesses for performing clamping screws can be thread-free. The corner element may also be formed as a small-sized, preferably solid and provided with threaded holes for clamping screws essay whose shape is preferably chosen so that its outer contour in the clamped state of the profiled tube corner substantially to create profiled tube corners without perpendicular to the corner plane protruding supports o flush merges into the outer contour of the adjacent profile tubes.

The corner element which can be arranged in the outer angle region has, in one development, at least one, preferably two, recesses which are at right angles to the profiled corner plane, into which end projections of the profile tubes can be inserted substantially free of side play. Through the engagement of the projections or pins in the Eckelementausnehmungen can be given during assembly and in the assembled state, a positive rotation of the profile tubes and an effective relative position assurance between corner element and adjoining the profile tubes. Such a recess can also be designed and dimensioned such that it can serve as a common insertion opening for projections arranged correspondingly close to one another on the end faces of both profile tubes to be connected.

Profile tube frames according to the invention can be constructed from profile tubes of any cross-sectional shape, for example tubes with a circular, oval, rectangular or generally polygonal cross-section. A refinement which is advantageous both in terms of aesthetic aspects and in terms of functionality, in particular with regard to the achievable vibration stability and strength of the connection, is characterized in that the profile tubes have a rounded, in particular semicircular cross-section in the outer region and a rectilinearly limited cross section in the inner region , in particular have a rectangular cross-section. As a result, on the one hand a Rundrohroptik can be achieved, in which, for example, a Tischzargenrahmen optically fits to circular cylindrical support legs. On the other hand, for example, a table top facing the frame top, the opposite frame bottom and the frame inner side can form flat surfaces, which are particularly suitable as support surfaces for clamping elements and / or for attaching further elements to the profile tube frame.

For attachment of, for example, for attachment of table tops provided connecting elements on the profile tube frame, a profile tube at least one point transverse to the tube longitudinal direction, for example, from the top to the bottom of the profile tube continuous connection opening. This can be defined by two mutually aligned, in particular circular pipe wall openings of the same size. In the area of this preferably unthreaded connection opening, a connecting element can be fastened, which in preferred embodiments can be carried out in a manner that is easy to assemble by clamping. Embodiments are particularly preferred which make it possible for the connecting element, on the side opposite the element to be fastened, to not extend beyond its outer surface when the table top is fastened to the underside of a profile tube, but can be completely lowered into the latter. As a result, for example, on the underside of table frames projecting burrs o. The like. Avoided, which in conventional tables repeatedly lead to minor injuries or tearing garments of a person working on the table. A preferred embodiment of an acting in the manner of a modified expansion anchor with axial clamping direction connecting element is described in detail in the embodiments.

With the help of inventive profile tube frame tables or table systems can be built, which correspond in terms of resilience and stability, in particular vibration stability, applicable to office and conference tables, high standards, easy to install and also by Formally clean design are also aesthetically beneficial. A special feature of a table system according to the invention, which is preferably buildable with the invention profile frame, but possibly also with other Zargenrahmen is that between the profile tube frame and carried by this work or table top at least over the substantial part of the length of the profile frame a preferably uniform Distance exists. This vertical distance between frame frame and plate is usually greater than 1 mm or 2 mm and / or smaller than about 150 mm and may be in particular of the order of one centimeter, for example at about 85 mm. This is not only aesthetically pleasing, but also provides a convenient way to easily attach other items to a table, z. B. by inserting mounting brackets o. The like. In the gap between frame frame and table top or in that the assembled profile tube frame is gripped from the side because between the frame top and bottom plate a desired space of sufficient size exists, for example, retaining clips or other fasteners Assemble assembly of the frame or the table to the profile tube frame.

For example, for the releasable attachment of a component, outside the corner regions of a profile tube frame, a transversely to the longitudinal direction of the profile tube attachable fastening device may be provided, which preferably has at least two at a distance about a profile tube height superimposed mounting leg which engage around the profile tube at the top or bottom and after plugging, if necessary, can be braced with the profile tube by means of a tensioning device attachable to the free ends of the mounting legs. Due to the Umgreifbarkeit of the profile tube particularly stable mounting options are given at any position along the length of a profile tube in this way, for example, to attach a freely positionable support leg. In the joint between frame frame and table top and horizontal legs of support brackets o. The like. Be inserted to secure, for example, in a third level above the table top in the edge region serving as a privacy blind discretion and / or an above the table top level arrangeable shelf. Similarly, below the plate plane, for example, arranged on a table narrow side functional elements, such as a support device for a computer and / or a printer, with the help of the Zargenrahmen attacking fasteners are stably fixed to a table frame.

These and other features will become apparent from the claims and from the description and drawings, wherein the individual features may be realized alone or in each case in the form of sub-combinations in one embodiment of the invention and in other areas and may represent advantageous embodiments.

Embodiments of the invention are illustrated in the drawings and are explained in more detail below. Show it:

1 an exploded perspective view with end portions of two profile tubes of an embodiment of a demountable profile frame according to the invention, which are clamped together by means of a clamping device in the corner of a table frame and a round tube table leg;

2 a schematic view of a profiled tube corner, in which the in 1 shown parts are shown in the connected state;

3 a side view of wall recesses of a support leg of another embodiment;

4 a schematic view of a profiled tube corner in the region of 3 shown supporting leg;

5 a side view of wall recesses of a round tube support leg of another embodiment;

6 a schematic view of a profiled tube corner in the region of 5 shown supporting leg;

7 a perspective view of the concatenation of two built-up with the invention profile tube frame table frames, being replaced on a table frame two frame legs in Profileckbereich by a freely positionable support leg;

8th a view of an embodiment of a profiled tube corner, in which instead of a support leg, an outer corner closing corner element is mounted;

9 a partial side view of the 8th shown embodiment, wherein between the frame frame and the overlying table top, a distance is visible;

10 a side view of an embodiment of a connecting element for connecting a profile tube frame with a table top in a state inserted into the profile tube before screwing to the table top;

11 the connection element 10 after screwing with the table top;

12 a perspective view of the upper end of a freely positionable support leg with a fastening device for releasably securing the support leg on the profile tube frame;

13 a partial side view of the 12 shown fastening device after attachment to the profile tube frame; and

14 a perspective view of two tables of a table system according to the invention with a fixed between the tables, transparent in the lower area discretion and with an attachable to the table frame holding frame.

In the following description of preferred embodiments of inventive profile tube frame or table systems, for reasons of clarity, corresponding elements are identified by the same reference numerals.

The exploded view in 1 shows the area of a table top corner of a table system belonging to a single table that can be used as a freely deployable communication table and, for example, in seminar and meeting rooms, office work in the cell or group room office, in a team workstation or in conference or presentation rooms flexibly applicable and also a concatenation, ie a stable, but detachable connection with other tables, preferably of the same table system, allows. The collapsible table frame has a right-angled frame or truss frame with rounded sides or trusses on their visible outer sides 1 . 2 , which in the corner of the frame in each case with a round tubular, possibly adjustable frame leg 3 are detachably connected or connectable. The longitudinal or transverse frames serving steel profile tubes 1 . 2 have in the embodiment shown with a wall thickness of about 2 mm, a height of about 4 cm and a width of about 4.5 cm. By a D-shaped cross section is achieved that the visible outside 4 conveys the visual impression of a round tube with a diameter corresponding to the diameter of the frame leg, while the top facing the table 5 , the opposite bottom 6 as well as the inside 7 are aligned flat and perpendicular to each other. As a result, the aesthetic advantages of a round tube optics can be combined with the advantages of rectangular tubes with regard to the attachment of tensioning devices and other fastening elements, etc.

The meeting in the field of corners corner end portions of the profile tubes are generally beveled with respect to their shape for the formation of profiled corners in the manner of a 45 ° miter cut, but the shape of the tube wall end faces features that in combination with each other and features of the clamping device used a particularly vibration or torsionally stable frame connection allow. So are on the front sides of the insides 7 , in the assembled state so in the internal angle range 21 the pipe joint, complementary engagement sections 8th formed with over the 45 ° -Gehrungsebene out standing, tooth-like projections and recesses therebetween, which engage positively in composite profile tubes with each other and thereby prevent both a relative rotation of the tubes against each other, as well as slipping in the vertical direction. Above and below the engaging portions are semicircular recesses 9 formed in the assembled state round through holes for clamping screws 10 form. At the tube top and the tube bottom are, starting from the inner wall 7 substantially slightly perpendicular to the tube longitudinal axis over about half of the tube width extending, slightly wedge-shaped recesses 11 cut into the later explained insert element 12 the associated clamping device with slightly wedge-shaped guide webs 13 positively engages. In the area of the transitions between the flat tops 5 or subpages 6 and the rounded outsides 4 are axially projecting, pin-like projections 14 formed during assembly of the frame corner in two superimposed Rohrausnehmungen 15 of the frame leg 3 interlock positively. In each case, the upper and lower projections of the profile tubes to be joined grip 1 . 2 in a common recess 15 , Wherein the total width of each engaging in a recess projections substantially in the circumferential direction of the tube 3 measured width of the recesses 15 corresponds, so that by the engagement of the projections 14 in the recesses 15 the pipe ends are pulled towards each other and an extrusion is prevented to the outside. The projections 14 are located at the top and bottom of quarter-circular end recesses 16 the profile tubes whose edges assembled state fit exactly on the cylindrically curved outside of the frame leg 3 are pressed so that a substantially closed joint area is formed, which is not contaminated by a weld, in contrast to conventional welds.

The complex structuring of the profile tube end faces is generated in the embodiment shown by a computer-controlled separation process with very low material losses, whereby both the course, and possibly the particular inclination of the separation surface is precisely controlled. Also the approximately at a distance of a pipe diameter from the miter surface spaced, circular Wandausnehmungen 17 on the upper and lower sides of the profile tubes are produced by cutting in the wall material. They have the same size at the top and bottom, are aligned with each other and form a through opening from the top to the bottom of the tube 18 into which one is particularly related 10 and 11 closer explained connecting element 19 for fixing a table or worktop 20 can be used.

The frame parts are by means of a clamping device 22 braced, the essential element of which already mentioned, one-piece made of steel insert element 12 is. It has the basic shape of a triangular prism with flat top and bottom faces 25 whose vertical distance is substantially the measured in the vertical direction of the inner diameter of the tubes 1 . 2 equivalent. About these end faces rise the already mentioned guide webs 13 , which form an approximately rectangular V-shape, are tapered slightly wedge-shaped to the free ends of the legs and have a wall thickness of the profile tubes about corresponding height. Halfway up the bet 12 are flat rectangular recesses on the inner triangular surfaces 26 formed, in which the lateral sliding of the tubes 1 . 2 on the insert element over the miter plane protruding projections of the engaging portions 8th glide along. Two vertically spaced, horizontally continuous, unthreaded holes 27 in the plane of symmetry of the insert element are used to pass through the clamping screws 10 , whose thread after passing through the pipe wall openings 15 of the frame leg in threaded holes 28 a semi-cylindrical, massive tube insert 29 made of steel, which in the upper end of the frame leg 3 so fixable is that the threaded holes 28 in extension of semicircular bulges of the wall recesses 15 to sit.

When installing the corner joint can first the end portions of the profile tubes 1 . 2 laterally on the insert element 12 be postponed so that the wedge-shaped webs 13 into the tube openings 11 penetrate until the tapered Pipe sides are approximated except for an existing gap, the serrations of the engaging portions 8th mesh and the insert element essentially disappears inside the crumpling in the corner tube profiles. The largely in this way in the correct position with little play each other associated profile tubes can then to the frame leg 3 be recognized, with the projections 14 each in the designated Rohrausnehmungen 15 engage positively and thus the frame leg largely correct position and secured against rotation on the still loosely connected Profilecke is fixed. The before or after this joining the parts in the through holes 27 introduced clamping screws can then to the threaded holes 28 attached and screwed into this. In the final stage of Einschraubvorganges is the insert element 12 with radially acting on the frame leg and parallel to the miter plane clamping force drawn to this, wherein the engagement of the wedge-shaped guide rails 13 in the recesses 11 the profile tubes 1 . 2 towards each other and pulled towards the frame leg and finally firmly clamped with this.

How out 2 it can be seen, the clamping screws 10 be screwed so far that their heads are largely or completely within the formed by the merging outer contours of the profile tubes overall outer contour of the Profilecke. As well as the guide bars 13 not or not significantly protrude beyond the top or bottom of the profile tubes, a total of a pipe corner connection is created in which none of the elements of the clamping device protrudes outward, creating a "clean" corner joint from the visual impression. By interlocking in many places engagement of the parts to be joined, the corner joint is also extremely stable against the action of external forces.

In the case of 3 and 4 explained embodiment, the frame leg 3 in comparison to the embodiment according to 1 and 2 further translated into the Zargenecke in the direction of the bisector, so that the frame leg is embraced at most half of its circumference of the frame frames. This is at largely identical profile tubes 1 . 2 achieved in that the abutting against the frame leg outside Stirnausnehmung 16 the profile tubes is further cut and that in addition to having a slightly different shape, vertically spaced tube recesses 15 in the frame leg 3 two essentially moon-shaped leg holes 35 are cut, in each case a part of the pipe wall in the region of the Stirnausnehmung 16 engages the attached profile tubes. In this way, if necessary, the torsional stability of the corner joint can be further improved.

Based on 5 and 6 is explained a particularly easy to install variant, in which the vertically spaced pipe recesses 15 by bulges in one to the upper end of the frame leg 3 continuous longitudinal slot 40 are formed. On both sides of the frontal mouth of the longitudinal slot 40 are circumferentially offset from each other at an angle of about 90 °, two U-shaped, open to the front of the frame leg Wandausnehmungen 41 cut out. Through the longitudinal slot 40 It is possible for the assembly in the interior of the frame profile tubes to be introduced, prism-shaped insert element 12 and the semi-cylindrical tube insert 29 for the frame leg by means of the clamping screws connecting these elements 10 to pre-assemble as a unit. On this preassembled unit can first the Zargenrohrprofile 1 . 2 be laterally attached before then the frame leg is plugged axially, in which case the longitudinal slot 40 over the clamping screws 10 is pushed. In order to prevent a spreading of the one-sided slotted end portion of the frame leg in the tension, are on the bottom of the aufzusetzenden plate on the frame 20 projections 42 attached when inserting the plate in the Stirnausnehmungen 41 intervene largely free of play.

Based on 7 to 9 explains that profile tube frame according to the invention also for the formation of free corners without attached frame legs 3 are suitable. This shows 7 schematically a table frame 45 with rectangular profile tube frame and four round tube corner legs as well as another table frame 46 leading to the formation of an L-shaped table corner with the table frame 45 to be linked or connected. In the interior angle area at the corner 47 of the table frame 46 To avoid a normally existing cradle leg and to provide sufficient Knee slewing space for a user, is in the middle of the associated narrow side of the table frame in connection with 12 and 13 closer explained, freely positionable support leg 48 attached to the frame. Instead of the frame leg is a corner element of the corner joint a massive, made of steel material corner cap 50 intended. The in plan view ( 8th ) lenticular appearing end corner 50 is on its side facing the frame 51 just like an alternatively attachable frame leg curved circular cylindrical. It has on the opposite outside 52 an outer contour, which is substantially flush or slightly projecting to the adjacent, cylindrically curved outer sides of the frame tubes 1 . 2 connects and both in plan view ( 8th ), as well as in side view ( 9 ) is curved in a substantially circular arc. On the inside 51 of the massive forehead insert are recesses 53 provided, whose shape is substantially the shape of the recesses 15 in 1 equivalent. In between are tapped holes 54 for screwing in the clamping screws 10 , The assembly of a frame leg free profile frame corner with the help of such corner caps is preferably carried out in accordance with in connection with 1 explained procedure.

A peculiarity more preferable, in particular with the help of inventive Profilrohrzargen buildable tables is that between the polygonal, usually rectangular frame frame and the attachable table or worktop over the entire length of the frame frame a distance or a joint 55 is provided, the amount of which may be, for example, in the order of 0.5 to 1.5 cm and / or may be more than 5% or 10%, and preferably less than half the plate thickness. Here, a table top is supported in the corner on the upper front side of a possibly existing support leg, while between the corners spacers 56 may be provided, which preferably as parts of the illustrated below connecting elements 19 are formed. Table systems with such a distance between Zargenrahmen and plate can be constructed with any suitable Zargenrahmen, including with non-inventive frame frame.

One in the 1 . 10 and 11 clearly visible preferred embodiment of a multi-part connecting element 19 for plate attachment has an inner part made of plastic 57 and a made of deformable plastic, cylindrical sleeve-shaped outer part 58 , with the help of an axially engaging screw in the inner part 59 is axially displaceable relative to the inner part. The inner part has a circular cylindrical support section serving as a spacer 56 whose diameter is greater than the diameter of the profile tube openings 17 is. At these closes a substantially backlash in the opening 17 matching cylinder section, which in a cone section 60 passes, to which a cylinder section 61 smaller diameter connects. The outer sleeve 58 has a diameter of the section 61 about corresponding inner diameter, one the diameter of the wall opening 17 corresponding outer diameter and is at its inner part facing the end by four longitudinal slots 62 formed spreadable. At the opposite end may be the head of the screw 59 attack.

Plate fixing by means of connecting elements 19 is quick and easy to do and can be done as follows. First, the elements of the connecting part can be preassembled by the outer sleeve 58 over the section 61 put the inner part and the two parts with the help of the screw 59 be loosely attached to each other. Then the preassembled unit from the top to the stop of the support section 56 on the profile top into the connection opening 18 be plugged. Once all fasteners have been inserted, the table top can be laid on top. During the subsequent screwing in of the screw 59 becomes the outer sleeve 58 taken through the screw head in the direction of the inner part, wherein the slotted spreading portion slowly over the cone 60 is pushed and thereby gradually spread to an outer diameter which is larger than the inner diameter of the connecting hole or the holes 17 is. in the End stage of the tightening process, when the screw has already penetrated into the plate material, abuts the outer sleeve from the inside to the upper wall of the frame tube, which thereby between spacer or support portion 56 and outer sleeve is clamped in the axial direction of the clamping screw. Further screwing in the screw 59 against an increased resistance then the screw head can still slightly into the resilient material of the outer sleeve 58 penetrate, whereby the screw head is completely retractable. The length of the outer sleeve 58 is suitably dimensioned so that in the stressed state ( 11 ) the sleeve is not or not essential on the bottom 6 protrudes the profile tube or is slightly sunk into the profile tube. As a result, the underside of the frame is smooth and free of protruding screw heads or other protrusions, so that a person sitting at the table is not in danger of tearing their clothes when sitting down or getting up.

Based on 12 to 14 is exemplified as the circumferential joint 55 between the table top and truss frame can be used to stably attach other elements in a simple way at one or more tables of the table system. This in 7 shown, freely positionable along a traverse support leg 48 has at its upper end at a distance from the pipe end face a horizontal, semi-cylindrical recess 65 , in which the semi-cylindrical outer contour of a profile tube is accurately inserted transversely to the leg longitudinal direction. In the area of the recess 65 is a serving as a fastening device, U-shaped bent flat steel sheet bending part 66 used and fixed, for example, by welding so that its plane-parallel mounting legs 67 horizontally from the support leg 48 dissipate, leaving a vertical distance between the thighs 67 essentially corresponds to the profile tube height. At the free ends of the thighs 67 are rectangular recesses 68 cut out, in the after lateral sliding of the mounting bracket 67 via the profile tube from below or above a substantially cuboid clamping element 69 can be inserted. This has on its profiled tube side facing away from two at the distance of the legs 67 arranged rectangular grooves 70 and two horizontally threaded holes in between 71 for receiving grub screws 72 ,

That stuck with the clip 66 connected support leg 48 can at any longitudinal position of a profile tube between the Zargenecken before or after mounting the associated table top 20 be pushed laterally, with fully assembled table, the upper leg 67 penetrates into the joint between frame frame and plate underside. Then from above or when the table is mounted from below, the clamping block 69 so in the recesses 68 pushed, that the support leg averted front edge of the rectangular recess in the respective groove 70 of the clamping block 69 can penetrate, whereby the clamping part can turn secured against tearing down before tightening the grub screws. Then the grub screws are tightened, with their flat front sides on the tensioned flat inside 7 support the profile tube. The profile tube is then horizontal between the semicircular recess 65 clamped the support leg and the clamping block, positively fixed in all directions perpendicular to the tube longitudinal axis and frictionally parallel to the longitudinal axis.

In 14 It is shown that the gap between the traverse and the tabletop can also be used with the help of U-shaped clamps 75 , which are pushed from the inside of the frame frame on a profile tube, to attach a holding frame to the table, which is exemplified as a grid with 15 a plurality of transverse struts and a horizontal, outwardly projecting grid footprint. gripping elements 77 with adapted to the size of the round tube supporting legs gripping openings can be snapped on the support legs for further determination of the holding frame. On the lower shelf of the support frame, for example, a computer can be placed or it can be hung on the grating crossbars storage shelves o.

Also the above the table tops 20 lying third level can be used for attaching table accessories. For this purpose, in the example shown L-shaped curved, designed in the manner of bookends fasteners 79 provided with a extending over both legs, central longitudinal slot through the hand-operated wide-head screws 80 can be pushed into corresponding threaded holes of a mounting element. The thickness of the plate-shaped legs is dimensioned such that a leg is substantially free of play and possibly slightly clamped from the side under the table top in the gap between the table top and frame frame insertable and possibly clamped can be fixed. An attachment can then be screwed onto the legs projecting beyond the top of the table.

The attachment shown in the example 81 is about 30 to 40 cm high discretion 81 which can be fastened vertically in the abutting area of two identical tables adjoining each other along their longitudinal edges in order to create two optically and acoustically largely separate and thus undisturbed workstations in a confined space on the other longitudinal sides of the tables. A peculiarity of the privacy-visible discretions in the upper area is that it is translucent or transparent in its sub-area near the table at a height of, for example, 10 cm to 20 cm, including the lower part, for example, through a frosted glass pane 82 or a corresponding translucent plastic part may be formed to allow light from the opposite double table side. This creates the impression of large table depth even on a relatively narrow worktable, so that a user does not have to feel that he is sitting tightly in front of a wall. On the other hand, a direct glimpse of the opposite tabletop can be prevented by a milky or otherwise opaque design of the lower panel area in order to ensure the discretion function.

The desk system exemplified here has a wealth of technical details that can be advantageous both in conjunction with each other, as well as each separately. A special feature is given in particular by the formation of a vibration and bending stable Zargeneckverbindung without disturbing fasteners in the inner corner area, as they are for. B. off 2 . 4 . 6 . 7 and 8th is recognizable. Another, apart from, advantageous feature is by the distance 55 between frame frame and tabletop underside given, for example, the related 12 to 14 explained, simple, stable mounting options. Also related to 10 and 11 explained, working in the manner of a modified expansion plug connection element 19 , which guarantees a fast, fixed plate attachment as well as a smooth frame lower side due to its retractability, can be advantageous also with other table systems. Finally, discretionary screens in the 14 shown type with a z. B. formed by a transparent or partially transparent glass or plastic disc, translucent, but preferably largely opaque lower part benefits that are useful in many other table systems.

Claims (24)

Dismountable profile tube frame for carrying at least one table or worktop ( 20 ), with profile tubes ( 1 . 2 ) whose end regions are adapted to each other to form profiled tube corners and which in the region of the profiled tube corners by means of a tensioning device ( 22 ) are detachably connectable to each other, wherein the clamping device is designed so that in the assembled state of the profile tubes ( 1 . 2 ) at least in the inner angle range ( 21 ) the profile tube corner no connecting element of the clamping device substantially on the common outer contour of the profile tubes ( 1 . 2 ) protrudes, characterized in that the tensioning device ( 22 ) at least one insert element ( 12 ), which in assembled profiled tube corner substantially in the interior of the profile tubes ( 1 . 2 ) is arranged; the insert element ( 12 ) V-shaped guide projections ( 13 ) which is adapted for engagement in wall recesses ( 11 ) of the profile tubes ( 1 . 2 ) are provided, which in the end region of the profile tubes ( 1 . 2 ) are aligned transversely to the longitudinal axes of the profile tubes; and the profile tubes ( 1 . 2 ) in its end region complementary engagement sections ( 8th ) having projections and / or recesses, which are formed for positive engagement with each other. Profile tube frame according to claim 1, characterized in that the tensioning device ( 22 ) is formed so that at the top ( 5 ) and / or at the bottom ( 6 ) of the profiled tube corner none of the connecting elements substantially over the common outer contour of the profile tubes ( 1 . 2 protrudes). Profile tube frame according to claim 1 or 2, characterized in that the end regions of the profile tubes ( 1 . 2 ) are worked on a miter. Profile tube frame according to one of the preceding claims, characterized in that the end regions of the profile tubes ( 1 . 2 ) are structured in opposite directions so that both end portions of a profile tube can be used to form a profiled tube corner with another profile tube. Profile tube frame according to one of the preceding claims, characterized in that the profile tubes ( 1 . 2 ) with their open end portions laterally on the insert element ( 12 ) are attachable. Profile tube frame according to one of the preceding claims, characterized in that the tensioning device ( 22 ) can be arranged in the outer angle region of the profiled tube corner element ( 3 . 50 ), which preferably at least one, in particular two perpendicular to a profile corner plane spaced recesses ( 15 . 53 ) for receiving front projections ( 14 ) of the profile tubes ( 1 . 2 ) having. Profile tube frame according to claim 6, characterized in that the corner element ( 3 ) is a round tube-shaped, substantially perpendicular to the plane of the profiled tube corner element, in particular a support leg or a part of a support leg. Profile tube frame according to claim 6, characterized in that the corner element ( 50 ) is a corner insert, preferably with a substantially flush with the outer contour of the adjacent profile tubes ( 1 . 2 ) final outer contour. Profile tube frame according to one of claims 6 to 8, characterized in that the clamping device ( 22 ) Clamping means, in particular at least a clamping screw ( 10 ) for bracing the insert element ( 12 ) with the corner element ( 3 . 50 ), wherein preferably several, in particular two perpendicular to the plane of the profiled tube corner spaced clamping means ( 10 ) are provided. Profile tube frame according to claim 9, characterized in that the clamping means ( 10 ) from the inside angle range ( 21 ) of the profiled tube corner forth by the insert element ( 12 ) are passed through. Profile tube frame according to claim 9 or 10, characterized in that the clamping means ( 10 ) in the corner element ( 3 . 50 ) or an insert ( 29 ) in the corner element ( 3 . 50 ) intervene. Profile tube frame according to one of the preceding claims, characterized in that the profile tubes ( 1 . 2 ) on its outside ( 4 ) have a rounded, preferably semicircular outer contour and in the inner region have a rectilinearly delimited, in particular right-angled outer contour, wherein a profile tube ( 1 . 2 ) preferably has a D-shaped cross-section. Profile tube frame according to one of the preceding claims, characterized in that a profile tube ( 1 . 2 ), in particular for fastening a connecting element ( 19 ) on the profile tube, at least one point, preferably from the top ( 5 ) to the bottom ( 6 ) continuous connection opening ( 18 ), which preferably by two mutually aligned, in particular circular pipe wall openings ( 17 ) of the same size is defined. Profile tube frame according to one of the preceding claims, characterized in that a profile tube for fixed connection, in particular screwing, the profile tube with a table or worktop to be fastened thereto ( 20 ) at least one preferably multi-part constructed connecting element ( 19 ), which is preferably for clamping in the region of a connection opening ( 18 ) is formed of a profile tube. Profile tube frame according to claim 14, characterized in that the connecting element ( 19 ) is formed in the manner of an expansion anchor, preferably with a in the axial direction of a clamping screw ( 59 ) acting clamping direction for clamping engagement on a wall of a profile tube. Profile tube frame according to claim 14 or 15, characterized in that the connecting element ( 19 ) is designed such that it is in a connection opening ( 18 ) of a profile tube ( 1 . 2 ) on the table or worktop ( 20 ) opposite side of the profile tube is substantially completely retractable. Profile tube frame according to one of claims 14 to 16, characterized in that the connecting element ( 19 ) an inner part ( 57 ) with a cone section ( 60 ) and one by means of a screw ( 59 ) axially on the inner part slidable, sleeve-shaped outer part ( 58 ) having a spreading portion, which is spread open by being pushed onto the cone portion, wherein preferably the spreading portion in the unexpanded state in the connection opening ( 18 ) of a profile tube is inserted and spreadable to a diameter which is greater than the diameter of the connection opening. Profile tube frame according to one of claims 14 to 17, characterized in that the connecting element ( 19 ), in particular its inner part ( 57 ), a preferably adjoining the cone portion of the inner part supporting portion ( 56 ) whose diameter is greater than the diameter of the connection opening ( 18 ), wherein the support portion is preferably formed as a spacer. A table system comprising at least one table for supporting at least one table or worktop ( 20 ) a demountable profile tube frame ( 1 . 2 ) according to one of claims 1 to 18. Table system according to claim 19, characterized in that between the profile tube frame ( 1 . 2 ) and an attached table or worktop ( 20 ) at least over a substantial part of the length of the profile tube frame, in particular substantially over the entire length of the profile tube frame, a preferably uniform distance ( 55 ) exists. Table system according to claim 20, characterized in that the distance is greater than 1 mm or 2 mm and / or less than about 150 mm, wherein the distance is preferably between about 70 mm and about 100 mm and / or that the distance greater than 5% or 10% and / or less than approximately 50% of the thickness of the plate ( 20 ). Table system according to one of claims 19 to 21, characterized in that for the fixed connection of the profile tube frame ( 1 . 2 ) with the plate ( 20 ) at least one connecting element ( 19 ) is provided according to one of claims 14 to 18. Table system according to one of claims 19 to 22, characterized in that for releasably securing a component, in particular a support leg ( 48 ), between the end portions of a profile tube at least partially insertable transversely to the longitudinal direction of the profile tube between the profile tube and the plate and / or attachable to the profile tube fastening device ( 66 . 75 . 79 ) is provided, preferably with at least two spaced apart a profile tube height to each other, preferably plate-shaped mounting legs ( 67 ), preferably by means of an attachable at the free ends of the mounting legs clamping device ( 69 ) is clamped with the profile tube. Table system according to one of claims 19 to 23, characterized by at least one above the table or worktop ( 20 ) substantially vertically discretionary discretion ( 81 ) with a sub-area near the table and an adjoining, table-distant upper area, wherein the upper area is substantially opaque and the lower area ( 82 ) is translucent, in particular at a height of up to about 10 cm or about 20 cm above the table or worktop, preferably the lower portion by at least one translucent plastic or glass plate and the upper portion by at least one opaque plastic or wooden plate is formed.

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