NO300819B1 - Metal hollow hollow profile, method of producing a hollow hollow profile, and a hollow construction with hollow hollow profile - Google Patents

Abstract

The hollow profiled metal bar, esp. made of aluminium is for use in double-glazing, and has a lengthwise weld seam (12a). The seam is formed in a retracted portion of the profile, where it is concealed. There can also be a second retracted portion (8b) on the opposite side of the bar, and which is a mirror image of the first one (8). The bar can have two parallel sidewalls (6), and two other walls (7) at right angles to them with the retracted portions form ed in them and running centrally in the lengthwise direction.

Description

The invention relates to a bar hole profile made of metal, in particular

of aluminium, with a longitudinal welding seam and intended for an insulating glass or multi-glazed pane, as well as a method for producing a slatted hollow profile as well as a slatted structure with slats consisting of hollow profiles.

Bars in insulating glass panes are arranged between two panes of glass in, for example, windows. The bars consist of hollow profile rods, which are joined together using, for example, connecting pieces at the crossing points and which are connected to the insulating glass pane's distance holder frame with connecting plugs. The slats either have the metal color or they are coated or coated with color, as the slats' color is mostly adapted to the color of the window frame.

In a known method for producing a rung, a hollow profile bar is extruded as a closed profile. In this manufacturing method, the hollow profile rod is assigned a relatively thick wall from the outset, because thin-walled profiles cannot be extruded in an economically sound manner.

For such a rung, a relatively large amount of material is thus consumed. A further disadvantage is that an external coating of the hollow profile rod is labor- and time-consuming, because the coating can only take place after the profiling.

In another known method for producing a rung, a hollow profile bar with a butt joint is formed from a metal strip, which is then closed by welding.

In the case of a rung produced according to this method, the weld seam is visible on the surface, which is optically unattractive. With a coating, the weld seam can indeed be made invisible, but the subsequent coating is just as labor- and time-consuming as for the extruded slatted hollow profile. In addition, the color consumption is high, because the coating must cover the welding seam in such a way that the welding seam becomes invisible. Applying color before welding is not possible, because the colorant would be burned in the area of the weld seam and make the hollow profile unremarkable.

As already mentioned at the outset, slatted hollow profiles are assembled into slatted structures between two panes of glass, which can in particular be included in insulating glass panes for windows.

Previous solutions consist of adding the mitered ends of hollow profiles laterally to the hollow profiles serving as main rungs as bracing in such a way that the mitered end could be inserted with a shock into a corresponding, mitered recess in the main strut. A connecting element made of plastic or steel which is predetermined to fit into the hollow profile, thereby serves to ensure an invisible connection of the hollow profiles which are joined together with butts.

As a disadvantage of this known slat construction, it turned out that the necessary miter cuts in both the profiles that were to be connected were labor- and time-consuming, as even with exact execution a bumpy edge could often be seen, which especially in the long run gave a disturbing impression.

As a result of this, another connection method was introduced, where this miter section is dispensed with, and where the two side edges are only cut off diagonally at the end of the hollow profiles that are to be inserted as crossbars, so that an upper and lower end section appears , with which the side edges of the main rung can be covered with overlapping. The edges of the two overlapping sections are further chamfered and adapted to a lateral bevel on the main rungs so that the sections rest without interruption against the surface of the hollow profile to which they were added. Two round metal pins serve as connecting elements, for which through openings are designed in the main rung, so that cross rungs can be added on both sides. These pins were fitted into the crossbar that was to be added, namely in in-front round grooves or grooves designed throughout in the flat profile's two side parts.

The advantage of this solution consisted in the fact that the overlapping sections of the transverse bars that were to be fixed could, by comparison, be carried out with much lower precision. Even further, it lapsed into the then used, disruptive butt seam. On the other hand, the design of the fastening grooves in the interior of the hollow profiles that served as cross bars had to be considered labor-intensive. In addition, the bores for the insertion of the round metal pins had to be designed very precisely and accurately, as the fit in the already existing round grooves was otherwise not provided or the attached parts could only be aligned with the round pins or the round grooves, so that they resulted in material displacements. When non-right-angled connections were desired, furthermore, the design of the round notches was almost impossible to implement, so that for this purpose different, expensive fastening methods had to be used (for example via adhesive connections).

In addition to this, the design of boreholes for wide slatted constructions is very labour-intensive, as the driller or milling cutter must move and drill or mill out on both sides.

As with the previous connection technique, it was also necessary to use thick-walled profiles to ensure a stable, bending-resistant slat construction, which profiles had to be produced by pressing/press casting. The total con-

construction was therefore not only expensive but also heavy.

It is the task of the invention to provide, in a simple way, metal-coloured as well as colour-coated/coated slatted hollow profiles with welding seam, where the welding seam does not have a disruptive effect and which, despite their small wall thickness, are relatively resistant to bending and twisting. In addition, a slat structure must be provided which, while ensuring sufficient stability, enables the use of light, thin-walled hollow profiles, especially slatted hollow profiles of the aforementioned type without special centering.

This task is solved, with regard to the bar hole profiles, using the features according to patent claim 1. Advantageous further designs of bar hole profiles according to the invention are indicated in the sub-claims that are dependent on patent claim 1. As regards the bar construction, the task is solved using the features according to patent claim 14. Advantageous further designs of the bar construction according to the invention are specified in the subclaims which are dependent on patent claim 14.

In the case of slatted hollow profiles according to the invention, the butt joint or the welding seam is located in a profile constriction in the inner space of the hollow profile. Here, the butt joint or the weld seam is not visible at the surface. In addition, the profile narrowing according to the invention increases the profile's bending strength and especially twisting resistance.

A particular advantage of the invention consists in the fact that a surface treatment, in particular a surface coating/overcoating with color or an anodizing, of the metal strip before the forming into a hollow profile rod can be carried out. It is thus possible to produce the hollow profile rod or the rung from an already surface-treated or surface-coated/coated metal band. Such a surface treatment or surface coating can be carried out more simply, faster and cheaper on a strip than on a hollow profile rod.

A further advantage of the invention is that the welding seam can be welded through better and thus be made wider and firmer. The weld seam can even be large, because it is so recessed in the profile narrowing or indentation that it is not visible. In addition to this, it can even be ensured that no continuous welding seam is carried out, as spot welding or only section-wise welding is carried out, which can reduce manufacturing costs considerably.

The idea of the invention with regard to the slat construction consists in an extremely rigid mutual connection of the opposite transverse hollow profiles of the slat cross. This extremely rigid connection is based on a skeleton construction that includes connection elements in each of the transverse hollow profiles, like a pin that connects the connection elements rigidly to each other. The stability of this skeleton construction enables the use of extremely thin profiles for both the transverse and main bars in the bar cross, as these do not directly participate in the connection of the bar elements. In contrast, the profiles are intended for the task of performing the outer skin, which is essentially pushed in over the skeleton construction and is held together with the help of this. Deformations, bending down or deflections and loosening of the profiles are thus almost excluded, also when using very thin profile material, which can thus be used for the first time for the relevant slat construction.

According to the invention, the straightening of the main hollow profile in relation to the transverse hollow profiles takes place through a special dimensioning of the insertion openings for the pin in the main hollow profile. According to the invention, these insertion openings are dimensioned in such a way that the pin is guided in the plane of the cross bars essentially without clearance, but with clearance across this plane. Thereby, the exact guidance of the connecting pin in the crossbar plane causes the desired straightening of the main hole profile in relation to the cross hole profiles, for example with an angle of 90°. However, across the plane of the cross bar, the main hollow profile has clearance with respect to the connecting pin which penetrates through this profile and thus with respect to the opposite transverse hollow profiles. This achieves that the transverse hollow profiles lie cleanly and without deformation with their contours against the counter-contour of the main hollow profile. One immediately recognizes the importance of this clearance, as the thin-walled profiles would be forcibly deformed in the absence of such clearance due to material tolerances or inaccurate manufacturing. This disadvantage is avoided by the aforementioned clearance.

In other words, according to the invention, the use of thin-walled profiles is made possible by the fact that the stabilization against downward/deflection no longer, as in the state of the art, must be created with the help of the hollow profiles themselves which are connected to the pins, as the connection forces, on the other hand, are taken up by the connection elements. Thereby, it can advantageously be ensured that the gable sides of the connecting elements which are located directly opposite the main hollow profile, extend parallel to the narrow sides of the main hollow profile and border immediately on these. According to an advantageous further design of this embodiment, it can be ensured that extension sections located directly opposite each other, which project perpendicularly forward from the end surfaces of the connecting elements, grip the wide sides of the main hollow profile, so that the contact of the connecting elements with the main hollow profile is raised surface-wise. Through this flattening of the connecting elements on the main hollow profile, turning moments and forces are absorbed by the connecting elements which are fitted into the attached transverse hollow profiles and thus do not act on the thin-walled end sections of the attached main hollow profile. For this reason, it is still sufficient when a single connecting pin is used. This also facilitates an oblique, non-right-angled assembly of the transverse hollow profiles on the main hollow profile.

According to an advantageous further development of the invention, the contour of the connecting element is adapted to the course of the cross-hole profile inner wall, the connecting element preferably being designed as an elongated massive body. This achieves a firm and secure connection of the connecting element with the respective transverse hollow profile. This constructive feature also allows the introduction of forces over a large surface from the connecting elements and into the transverse hollow profiles.

According to a particularly advantageous further development of the invention, the single connecting pin is preferably inserted into the connecting elements with a press fit. For this purpose, a fitting bore is designed/left in the connection element in question, the wall of which is designed complementary to the pin contour. A stable connection between the pin and transverse hollow profiles is provided through a polygonal design of the pin and the fitting bore in question. A square design of the pin is preferred, preferably a pin with a rectangular, especially square cross-section.

Advantageously, it is not only the pin that is inserted into the connecting elements with a press fit, since the connecting elements are also inserted into the transverse hollow profiles with a press fit. This is achieved by the connection element being designed with a slot which runs essentially parallel to the press fit bore for the pin and penetrates through this, the connection element in the slot area being designed splayed under a predetermined angle in the form of a flared pin. When inserting the connecting element designed in this way into a hollow profile, due to the compression of the slotted part of the connecting element during insertion, as a result of the expansion effect, a press-fit connection between the connecting element and the relevant hollow profile appears. The press-fit effect for the connecting element and also for the pin can advantageously be increased by the press-fitting bore for the pin in the area of the connecting element slot, when the connecting element is inserted in the side profile, being narrower than at the inlet end of the pin. Thereby, the expansion effect of the split connection element is increased when the pin is inserted, and this promotes the shaped press fit for the pin in the connection element's bore.

The design of the connecting pin as a square, in particular as a square with a right-angled cross-section profile, has the great advantage that the insertion openings for the pin in the main profile with the dimensions according to the invention, which allow no

clearance in the plane of the cross bars, but clearance across this plane can be realized in a simple way. Thus, when using a pin with a rectangular cross-section, it is only necessary, starting from the narrow side of the main hollow profile, to design a recess, for example by milling, the width of the recess in the longitudinal direction of the main hollow profile corresponds to the thickness of the pin, and which penetrates so deeply into the main hollow profile that the -the height of the ring perpendicular to the longitudinal direction of the main hollow profile exceeds the thickness of the pin. This achieves clearance-free guidance of a connecting pin with a rectangular cross-section in the plane of the cross bars, while this pin is guided with clearance across this plane.

The aforementioned recesses in the main hollow profiles are significantly easier to realize than the round bores at the state of the art, especially when the long-awaited thin-walled profiles are used, which are preferably produced by cheap rolling. The advantages consist in the simple and quick processing, as milling or sawing is easier than drilling in the main hollow profiles on a high edge. Moreover, no complicated clamping and drilling devices are required for the design of the recesses or through-holes, and the deformation forces in the design of the recesses are low. Finally, in contrast to round drilling, where the follow-up dimension must be observed carefully, there is no dependence on follow-up dimensions. Finally, the recesses that form the insertion openings in the main hollow profiles can be designed very easily, also in a non-right-angled form. For the crossing point, desired angles can finally be used.

The production of the connecting elements, which preferably consist of plastic or other materials (for example as an injection-molded object), and their fitting into the hollow profile ends through a processing of their internal contour, likewise do not require any complicated technique. Depending on the internal cross-section of the profiles, a fit over several fitting surfaces is used, for example, possibly in combination with a groove, as the outer contour of the connecting element is adapted to the inner contour of the transverse hollow profile. The execution of the connecting element or the negative part can be implemented differently in such a way that a frictional engagement and a firm fit in the hollow profile is achieved. The friction engagement can be created using friction ribs, press fit and so on. If, for example, two inner side stabilization beads or the like are formed in the profiles during rolling, corresponding grooves or grooves for receiving the beads or the like are formed in the connecting element on both sides. In the case of a special further design, in the end side area between the protruding end parts of the connecting element, bordering up to the pin recess, a degree of shape distribution can be designed, which fits into the indentation delimited by the beads at the outer edge of the main hollow profile.

In addition to this, it is advantageous to have friction ribs on all four sides of the connecting element, so that these can be inserted in a shaped and fixed manner, possibly with a press fit, into the hollow profiles.

The method to be used for the production of bar constructions according to the invention can be carried out in a simple way. One connecting element is fitted into the end of a transverse hollow profile which is to be added to a main hollow profile, a connecting pin having preferably been inserted in this connecting element in advance. The connecting pin is then inserted through the corresponding recesses in the main hollow profile, as the gable side of the connecting element and the protruding end part or overlapping part lie laterally face to face on the open end of the attached profile of the main hollow profile and possibly grip around it.

In an advantageous further design, the connecting elements are inserted into the hollow profiles before the counter-profile is milled out. This results in a massive end of the hollow profile. A window practically arises, for example consisting of two materials. The advantages are that the profiles can be clamped better when milling the counter profiling. This is particularly important for very thin-walled profiles that are difficult to process without connecting elements. Furthermore, an exact fit for connection to the continuous main rung appears. If the approach is not right-angled, the necessary saw cut through the hollow profile can be made with the inserted connecting element. The counter-milling takes place in a similar way, possibly at the desired angle.

The invention is explained in more detail below with reference to the drawings, where: Fig. 1 schematically shows a window with an insulating glass pane seen from the front; Fig. 2 is a section along the line II-II in fig. 1 on a larger scale; Fig. 3 schematically shows the representation of the bar hole profile from a broadband coil in a perspective view; Fig. 4 shows a section of the bar construction according to the invention with right-angled and diagonally applied transverse hollow profiles; Fig. 5 shows a side view of the rung construction from fig. 1; Fig. 6 shows the individual elements that are part of the construction according to fig. 4, before their joining; Fig. 7 shows a sectional view of a main hollow profile with an inserted square pin and an attachable hollow profile with connecting element for two different profiles; Fig. 8 shows a preferred embodiment of the connection element according to the invention; Fig. 9 shows the connection element according to fig. 8 in cross section; Fig. 10 shows a further design example of the individual elements included in the construction according to fig. 4, before the connection, namely in the same positions as in fig. 6; and Fig. 11 shows a sectional view corresponding to fig. 7 using the connecting element according to fig. 10. 1 fig. 1 shows a window 1 with insulating glass or multi-glazed panes. However, the invention does not only relate to bars for slatted windows with insulating glass panes but also bars for insulating glass and multi-glazed panes in general.

The window 1 with insulating glass pane generally comprises a window frame 2, at least two panes of glass 3 which are stored in the window frame 2 at a distance from each other, as well as a spacer frame 4 which keeps the panes of glass 3 at a distance from each other and is filled with desiccant. The bars 5 are arranged in the space between the glass panes 3. The rungs 5 consist of hollow metal bars with a longitudinal welding seam 12a, and are assembled in the form of a cross. At the crossing points, the bars 5 are put together in a known manner with cross-shaped connecting pieces (not shown). Connection plugs serve in a manner known per se to store the bars 5 on the distance frame 4.

The bars 5 can have different hollow profile cross-section shapes.

A neat profile is shown which shows side walls 6 which are arranged parallel to the glass panes 3 and end walls which extend across the side walls 6. The end walls 7 are narrower than the side walls 6, as a preferably hollow wedge-shaped transition part 6a is designed between the walls 6 and 7 .

It is essential that in both gable walls 7, suitably at the middle of their length, a longitudinal, retracted profile section 8,8b or groove-shaped indentations 9,9a are profiled.

The retracted profile parts 8, 8b are of the same shape and arranged mirrored in relation to each other. The 9.9a depth of each groove is, for example, 1/8th to 1/10th of the height of the profile (distance between the gable walls 7). The 9.9a width of the groove should be as small as possible, at least so small that the bottom of the groove remains invisible from the outside. Preferably, the side walls 8a of the grooves 9,9a abut against each other.

The rungs 5 are cut to the required length from hollow profile rods 11. The hollow profile rods 11 are formed from a relatively thin metal strip, for example of aluminium, the longitudinal edges 12 of the metal strip being bent towards each other, so that a closed pipe is formed. The support edges and longitudinal edges 12 are welded together, so that a welding seam 12a is formed. The subsequent profiling produces the grooves 9, 9a, so that the welding seam 12a is displaced to the interior 5a of the profile and is made invisible. In order for the rung 5 to look uniform, according to an appropriate embodiment of the invention, it is ensured that the part of the pipe 1a which lies directly opposite the groove 9 with the weld seam is designed in the same way and thus exhibits a corresponding groove 9.

The bar 5 consists - as already mentioned - preferably of aluminium. The wall thickness of the rung is particularly approx. 0.4 to 0.6 mm. The outer casing surface of the rung preferably carries a layer of color or is anodized.

A particularly simple method for producing a hollow profile rod 11 appears in fig. 3. The starting material is a relatively wide metal band 13, which is pulled off from a wide band coil 14. The metal band 13 consists, for example, of aluminum and carries on the outer side 13a a relatively thin layer of color 6c.

During its removal, the metal band 13 is first cut open

in the longitudinal direction in several strips 15, from which hollow profile rods 11 are preferably formed at the same time, for example by rolling and/or embossing. However, the strips 15 can also be rolled up and further processed at a later time. The hollow profiles 11 which are formed from the strips 15 can have the same or different cross-sectional shapes. Likewise, the strips 15 can be the same width or have different widths.

The division of the metal band 13 into several strips 15 through longitudinal incisions 16 takes place in a processing station A, through which the metal band 13 runs during the withdrawal. In the extraction direction, there is a processing station B with a shaping tool (not shown) behind the processing station A, in which the strips 15 are shaped into a tube lia with, for example, a circular cross-section and with longitudinal edges 12 butting against each other. The color layer 6c is thereby located on the tube's outer jacket surface. On a processing station C with a welding device and which is connected to the processing station B, the longitudinal edges 12 are welded together to form a welding shape 12a, preferably by high-frequency welding. Behind the processing station C is a processing station D with shaping tools (not shown), with which the retracted profile parts 8, 8b are shaped, as the profiling of the side walls 6, 6a and end walls 7 can be carried out at the same time as said shaping or afterwards.

During welding, color burns in the area of the welding seam 12a. Through the retracted profile part according to the invention in the area of the weld seam 12a, the weld seam itself as well as the colored part which is damaged as a result of the heat during the welding, is drawn into the groove 9, so that they become invisible from the outside. Through this unusual measure, it is achieved that hollow profiles that are shaped and welded together by a coated metal strip can be used as bars, without the welding seam or the partially burnt color area appearing optically disturbing. But also when using uncoated metal strips, slats can be designed with a hidden welding seam that does not have an optically disturbing effect.

The continuously produced hollow profile rods 11 are cut to commercial lengths and are thus available as intermediate products to the manufacturer of insulating glass panes. The manufacturer cuts the slats 5 from the hollow profile bars 11 and makes the desired slat designs for an insulating glass pane.

According to the invention, the technical teaching can thus be derived that at least one retracted profile part is provided for hiding the weld seam, as it is proposed for optical reasons that at least one further retracted profile part is designed, which is placed mirror-symmetrically to the retracted profile part with the weld seam.

Fig. 4 shows an example of a rung structure which comprises a main hollow profile 101 of sheet metal serving as the main strut or rung, two perpendicularly applied bracing or transverse hollow profiles 102, as well as an obliquely applied hollow profile 103. The hollow profiles 101, 102 are produced by rolling and are given identical design. The rolling of the sheet material of which the profiles are made is carried out so that an internal fold or fold 104 is formed at the two profile length sides, which contributes to the profile's stability. The special cross-sectional shape of the profiles 101, 102 and 103 can be seen, for example, in fig. 5, which shows a side view of the left half of the bar construction in fig. 4, namely a side view directed towards the one in fig. 4, on the left, the narrow side of the two transverse hollow profiles 102, which, like the hollow profile 103, is cut in such a way at their connecting ends through contour milling that an upper and a lower section 105 respectively 105• appear, which laterally overlap the main hollow profile 101. Through the one in fig. 5 chosen preparation, a drawing of the main hollow profile 101 appears which corresponds to a profile cross-section. Thereby, the two side folds 104 are seen which are arranged in a plane which is perpendicular to the drawing plane and constitutes one of the profiles' 101,102,103 mirror symmetry planes. The second plane of mirror symmetry runs perpendicular to the former through the two profile widths. The profile-wide sides comprise two mutually parallel running head surfaces

106 and 106' as well as two inclined surfaces 107 and 107' which join laterally to these and taper towards the profile template sides and the vault is concave. The contour of the profile template sides appears through the internal seam relief as a rounded transition 108 and 108<*> from the slanted rafters 107 and 107' respectively to the seams 104 and 104 • .

The contour milling at the connecting ends of the transverse hollow profiles 102 and the hollow profile 103 is chosen so that a protruding part 109 and 109' of these profiles' head surface - when the transverse profile is placed on the main profile - at the transition edge of these head surfaces 106 and 106• respectively abuts against the connected sloping surface 107 and 107' respectively. The front edge of the projecting part 109 and 109• thereby extends in a straight line and perpendicular to the longitudinal axis of the profile. Retracted side edges 110 are joined to the projecting part 109 and 109' respectively, which - when transverse hollow profiles are placed on the main hollow profile 101 - border with their cut edges the convexly extending sloping surfaces 107 and 107•. The obliquely running edges 110 extend to the transverse hollow profile connection ends close to their narrow sides, which during a rectilinear course are cut in such a way that they abut against the narrow sides of the main hollow profile 101.

Thereby, in the area of the connecting ends of the transverse hollow profiles - seen towards their narrow sides - an essentially U-shaped profile course appears, as the U-branches progress in an arc-shaped manner corresponding to the contour milling. Viewed against the broad sides of the transverse hollow profiles, an essentially trapezoidal profile course appears in the area of their connecting ends.

The design of the main profile described above must convey the optical impression of real bars. However, this design is not absolutely necessary. In contrast, all existing, essentially right-angled cross-sectional shapes can be used.

It is essential for the slatted structure in question that a slatted structure has been chosen which ensures that the wall thickness of the hollow profiles can be decisively reduced compared to traditional hollow profiles used for slatted structures. The skeleton structure described in the following ensures that profiles with up to 50% less wall thickness than with previous slat constructions can be used.

One element of the skeletal structure is shown in fig. 4 and 5, namely a connecting pin 111. The connecting pin 111 penetrates through the main hollow profile 101 in the transverse direction, the narrow sides of which are provided with insertion openings 112, as can be seen for example from fig. 6, which shows an exploded view of the elements of the bar construction according to fig. 4, the connecting pin 111 being inserted into connecting elements 113, which are inserted into the connection ends of the cross profiles in the manner described later.

As can be seen from fig. 6 to 9, is the connecting element

111 designed as a massive body, whose contour - as can be seen from the cross-sectional drawing according to fig. 3 - is adapted to the inner wall contour of the profiles. Thus, at the connecting elements 113, in a complementary design to the hollow profiles, there are two flat, opposing head surfaces 114 and 114<1> as well as inclined surfaces 115 and 115' which laterally join these and which are curved convexly corresponding to the inclined surfaces 107 of the hollow profiles. The side surfaces 116 is in the embodiment shown according to fig. 3 only roughly adapted to the inner contour of the hollow profiles, which in these places show the folds 104 and 104' as well as the rounding rafts 108 and 108<1>, which in cross-section together with the central folds show a course reminiscent of the bulging course of a B. The side faces 116 up-

does not show this fineness of contour, which is why the width extent of the connecting element 113 from side surface 116 to side surface 116 roughly corresponds to the clearance between the opposite folds 104 in the hollow profiles. Alternatively to this, it may be advantageous to choose the aforementioned width extent of the connecting element 113 so large that it corresponds to the distance between the narrow side inner walls of the hollow profiles. In this case, recesses are formed in the side walls 116 of the connecting element 113 in these places which adjoin the folds 104. This achieves a versatile surface contact for the connecting element 113 with the inner wall of the respective hollow profile.

As can be seen from the cross-sectional drawing of the connecting element 113 according to fig. 9, a bore 117 is formed in the center of the connecting element 113, which serves to receive the connecting pin 111 and has a cross-sectional design that is precisely adapted to that of the connecting pin. The one in fig. The cross-sectional shape shown in 9 is preferred, namely in the form of a square cross-section for the bore 117 and a corresponding square cross-section for the connecting pin 111.

In order to ensure a firm fit of the connecting pin 111 in the receiving bore 117 of the connecting element 113, as well as at the same time a firm fitting of the connecting element 113 in the connection end portion of the transverse hollow profiles, the connecting element 113 - as is best shown in fig. 8 - designed widely in the form of a split plastic pin. For this purpose, the connecting element 113 in the form of a massive body is provided with a longitudinal slot 118, which extends in the direction of the central longitudinal axis of the connecting element 113. The starting point of the slit 118 is in the front third of the fitting bore 117 for the pin 111, which bore likewise extends along the longitudinal central axis of the connecting element, more specifically with a length that roughly corresponds to two thirds of the length of the connecting element 113. In other words, the bore hole 117 is designed as a blind bore. Starting from its bottom in the front part of the fitting bore 117 with respect to the insertion direction of the pin, the slot widens towards the adjacent end of the connecting element under an angle a which lies in the plane of the drawing, as can be seen from the left half of fig. 8. The right half of fig. 8 shows the connection element 113 in the state it takes upon complete introduction into a hollow profile, which for the sake of overview is shown just as little as the pin 111 which is inserted into the fitting bore 117. It should thereby be clear that the rectilinear fitting bore 117 in the relieved spoke position according to the left half of fig. 8, in the compressed state of the connecting element according to the right half of fig. 8, in the area of the slot 118, whose V-shaped cracking has then been brought to an end, exhibits a cross-section which decreases continuously in the direction of insertion of the pin 111. In the case of an inserted pin, this means that the connecting element 113's potential expansion or expansion force in the inserted state is supported through the expansion force that is exerted across the direction of insertion of the pin on the fitting bore 117 in the slot part through the slot on the bore walls, which expansion force is effected through a compression of the connection element's material in the slot part of the fitting bore. The consequence of this is an excellent press fit for the connecting element 113 in the respective hollow profile as well as an equally high-quality press fit for the pin 111 in the fitting bore 117.

As can further be seen from fig. 8, the connecting element 113 is designed to taper at an angle 6 towards its front end, counted in its insertion direction. For this purpose, it has obliquely extending side walls 120. These are preferably designed both at the side walls 116 and at the head surfaces 114 and possibly also at the inclined rafts 115. This wedge-shaped design of the front connecting element end allows, especially with regard to the splayed design of the connecting element, a simplified insertion in the respective transverse hollow profile connection end.

In the area of its rear gable surface 121, calculated in the direction of insertion, the connecting element 113 is designed with an expansion in width, possibly through inclined surfaces, namely through the surfaces 120 which extend complementary to the inclined surfaces 120. A particularly tightly fitting press contact is thereby achieved at the outer end of the connecting element 113 Between the inclined surfaces 122 at the rear end of the connecting element 113 and the inclined surfaces 120 at the front end of the connecting element 113, obliquely extending wall parts 123 also extend in the area of the side walls 116. These extend under an angle, which is half as large as the opening angle of the slot 118 , and these wall parts 123 take - when the connection element 113 is inserted into a transverse hollow profile - a course parallel to the profile side walls, analogous to a plastic expansion bolt.

The one in fig. 6 showed variant of the connecting element 113

corresponds to the design according to fig. 8, except that the inclined walls 122 placed in front are not present in the variant according to fig. 6, and except that the longitudinal slot 118 extends to the vicinity of the end wall of the connecting element 113 which

located at the insertion side of the pin. The connection element 113 is in fig. 6 shown in the state it takes when inserted into the hollow profile 102, i.e. after overcoming the originally gaping design of the connecting element 113, as shown in the left half of fig. 8. To the left and to the right of the slot 118 extend, parallel to this, in the head surfaces 114 and 114' of the connecting element 113, designed grooves 124, which extend over the entire length of the connecting element 113 and open out at the respective end surfaces. These grooves 124 cause a certain elasticity in the connecting element 113 in the transverse direction, i.e. in the direction towards its two narrow sides 116, which facilitates the insertion of the connecting element into the respective hollow profile.

As can be seen from fig. 7 in connection with fig. 5, the front gable surface of the connecting element 113 is finished flush with the edges of the retracted narrow sides of the hollow profile, which forms the step in the U-shaped profile cross-section, seen against the narrow side of the profile connection end. Thereby, a large contrast to the directly opposite narrow side of the main hollow profile is achieved. From fig. 7, it is further stated that the length of the connecting pin 111 and the depth of the fitting bore 117 are chosen in such a way that the pin and connecting elements - when the pin is fully inserted into the

the binding elements - form a firm and extremely rigid skeleton, without the hollow profiles 101 and 102 being part of a fitting connection. On the other hand, it is the case that the transverse hollow profiles 102, with a complete connection between the skeleton elements 111 and 113, do indeed overlap the main hollow profile in an optically pleasing manner, but the hollow profile parts do not exert any forces on each other. The hollow profiles, on the other hand, to a certain extent form a skin which serves as a blinding for the skeleton construction and which is not at all exposed to downward or deflection forces. For this reason, the hollow profiles included in the previously described bar construction can be designed significantly thinner than in the state of the art, where the hollow profiles are intended for a load-bearing function.

From fig. 7 as well as of the middle part of fig. 6, it appears that the piercing openings 112 in the main profile 101 in the drawing plane, which make up the crossbar plane, have a dimension that roughly corresponds to the thickness of the connecting pin 111 in this plane. Thereby, a clearance-free recording of the pin 111 in the plane of the crossing bars is achieved, which means that the predetermined cross or crossing angle is precisely maintained. Perpendicular to the plane of the cross bar, however, the pin 111 is accommodated with clearance in the insertion openings 112. This is achieved by the insertion openings extending substantially to the main hollow profile's head surfaces 106 and 106' as well as over the total width of the main hollow profile's narrow sides. This results in the following shape of the penetration openings 102. When viewed towards the narrow sides of the main hollow profile 101, the recesses show a rectangular shape, where the narrow side of the rectangle extends in the longitudinal direction of the main hollow profile 101 and corresponds to the thickness of the pin 111, while the long side of the rectangle exceeds the thickness of the pin; in a view directed towards the main hole pro-mens xx Dreasiaer stire.K-K.the lnns^iKMngsdpnings 11/ loi the staple itself in a U-shape, and the U-step is pulled back a predetermined distance from the outer edge of the hollow profile, preferably equal to the head side 106 of the hollow profile 101 or at least to the middle of the respective inclined surface 107. Under no circumstances does said U-step extend so far into the main hollow profile that this is weakened, or so that no covering occurs by means of the projection 105 of the finished transverse hollow profiles 102.

Although it is not necessary with regard to the stability of the skeleton, in principle two or more pins can be arranged which create a rigid connection between connecting elements 113 to each other.

Fig. 10 and 11 show a modified design example of the slat construction in the same drawing and arrangement as for the slat construction according to fig. 6 and 7, since in the following we will only go into the features that do not correspond to fig. 6 and 7.

The main difference in the slat construction according to fig. 10 and 11 in relation to the previously described slat construction, consists in a different design of the connecting element 113. Thus, the connecting element 113 according to fig. 10 and 11 are not provided with a longitudinal slit, but have a contour with a protrusion placed in front, as described in more detail below.

As can be seen from fig. 10 and 11, the connecting elements are shaped so that they fit with several, a total of four, fitting surfaces into the end of the hollow profile which is mounted at right angles or at an angle, namely above, below and laterally at said end. The upper and lower fitting surface 125 is divided by two notches, and at the gable side of the connecting element 113 which is to be mounted to the main profile 101 there is a projecting end part 126, which due to the aforementioned division consists of three individual segments, which at the connection to the main hole-i: — — — -_ j x the file 101, in the same way as with the overlapping parts 105. Through the segmentation it is possible, also with less elastic plastic materials and with segments with greater wall thickness, to achieve their springy connection with a press fit against the sides of the main profile's overlap and underside.

The end portions 126 are designed somewhat shorter than the overlapping portions 105 of the transverse hollow profiles 102 and 103, so that they are not visible after the profile parts are joined. The connecting elements 113, which are produced from plastic, for example by injection molding, accommodate the pins 111 with a press fit in precisely made square recesses, as already described.

In order to achieve an even more predetermined adaptation of the connecting elements 113, there are not only notches formed on their side surfaces for receiving the folds 104, as a degree is formed parallel to the connecting element head sides, which fits into the one in fig. 5 visible recess formed by the folds 104 on the outside of the hollow profile 101.

Preferably, for a firmer fit of the connection elements 113, on the head sides 114 and 114<1> and the side walls continuous friction ribs are formed in the insertion direction.

This reduces the requirements for precision in the production and processing of both the hollow profiles and the connecting elements.

The shape of the main hollow profiles and the transverse hollow profiles and the fitting of the adapted connecting elements are not limited to the shown and described solution, as it can be deviated considerably from this if necessary, and other types of fitting can also be chosen. Thus, it is in principle possible to adapt the shape of the connecting elements only very roughly to the shape of the hollow profiles, and for a firm fit to use a hardening plastic compound. The same applies to the use of the pin or pins in the connecting elements. Shape or contour cutters are preferably used for the shaping of plastic connecting elements. This also applies to the production of the sections 104,104' of the hollow profiles. The length of the connecting elements 113 corresponds to the width and wall thickness of the profiles 101, 102 and 103. This also applies to the overlap sections' 126 length. Depending on the size and wall thickness of the hollow profiles, the fit and the material of the connection elements, the most diverse dimensions are possible in connection with the advantageous force transfer effect on the connection elements and the firmness of the connection area.

Claims (47)

1. Bar hollow profile (5/101,102,103) made of metal, especially aluminium, with a longitudinal welding seam (12a) and intended for an insulating glass or multi-glazed pane (3), where the hollow profile (5,'101,102,103) has two side walls (6) which are arranged parallel to each other and two end walls (7) that extend across them, characterized in that the welding seam (12a) is arranged in a recessed part (8) of the profile (5/101,102,103) so that it is hidden from the outside, and that the retracted part (8) of the profile is designed centrally in the gable wall (7). 2. Bar hole profile according to claim 1, characterized by at least one further retracted profile part (8b) which is mirrored in relation to the first-mentioned retracted profile part (8) and designed on the side of the bar hole profile (5/101,102,103) which is directly opposite the latter profile part (8) . 3. Bar hole profile according to claim 1 or 2, characterized in that the retracted profile parts (8,8b) are grooves (9) with a U- or V-shaped cross-section, the welding seam (12a) being located in the area of one groove (9) bottom. 4. Bar hole profile according to one or more of claims 1 to 3, characterized in that opposite side walls (8a) of the grooves (9) are arranged so that they abut one another. 5. Rail hole profile according to one or more of claims 1 to 4, characterized in that the outer mantel surface of the rail hole profile (5/ 101, 102, 103) is coated or coated, in particular coated/coated with color. 6. Bar hole profile according to one or more of claims 1 to 4, characterized in that the bar hole profile (5; 101, 102, 103) consists of aluminum and is anodized on the outer casing surface. 7. Method for producing a slatted hollow profile (5; 101,102, 103) according to one or more of claims 1 to 6 from a strip (15) of metal, preferably a strip coated/coated with color (6c) or an anodized strip (15), especially of aluminium, where the strip's (15) longitudinal edges (12) are bent towards each other to form a tube (lia) until they abut against each other, after which the longitudinal edges (12) are welded together and the further profiling of the tube (lia) into a hollow profile (5;101,102,103) with a predetermined cross-sectional shape is carried out, characterized in that, immediately after the welding, a retracted profile section (8) is formed in the pipe (lia) in the area of the weld seam (12a) in such a way that the weld seam (12a) will be at the bottom of the retracted profile section (8) and be invisible from the outside. 8. Method according to claim 7, characterized in that in the area located directly opposite the retracted profile part (8), an identical, but mirrored, retracted profile part (8b) is formed, which is preferably formed at the same time as the first-mentioned retracted profile part (8) . 9. Method according to claim 7 and/or 8, characterized in that U- or V-shaped grooves (9) are formed as retracted profile parts (8, 8b). 10. Method according to one or more of claims 7 to 9, characterized in that the opposite side walls (8a) of the retracted profile parts (8,8b) are permanently pressed against each other. 11. Method according to one or more of claims 7 to 10, characterized in that a circular tube (lia) is formed from the strip (15). 12. Method according to one or more of claims 7 to 11, characterized in that several narrower strips (15) or longitudinal blanks are formed from a relatively wide metal strip (13), and that hollow profiles are formed from the strips (15), preferably at the same time (11) . 13. Method according to claim 12, characterized in that the metal band (13) is coated/coated with color (6c) or anodized on one side. 14. Bar construction for mounting between two panes of glass (3), especially window panes, with bars (5) consisting of hollow profiles (101,102,103), especially bar hollow profiles according to one of claims 1 to 7, where - to form a bar cross - on a main hollow profile (101) is fitted with at least two mutually flush transverse profiles (102,102) which form a predetermined angle with the main hollow profile (101) and grip overlappingly around the main profile (101), and with at least one pin (111) for the main hollow profile (101)'s connection with the two transverse hollow profiles (102,102), and where the pin (111) penetrates the main profile (101) and is firmly connected to the two transverse hollow profiles (102,102), characterized by connecting elements (113) which can be inserted into the transverse hollow profiles (102,103), and which is then firmly connected to these, which connection element (113) has a fitting recess for the pin (111), and where there are insertion openings (112) for the pin (111) in the main hollow profile (10 1), which are dimensioned so that the pin (111) in the plane of the cross bars is guided essentially without clearance, but with clearance across this plane. 15. Bar structure according to claim 14, characterized in that the contour of the connecting element (113) is adapted to the course of the inner wall of the transverse hollow profile (102,103). 16. Rail construction according to claim 15, characterized in that the connecting element (113) is designed as an elongated solid body. 17. Rail construction according to claim 14, 15 or 16, characterized in that the fitting recess for the pin (111) extends essentially centrally through the connecting element (113). 18. Rail construction according to claim 17, characterized in that the fitting recess is designed as a blind bore. 19. Rail construction according to claim 17 or 18, characterized in that the fitting recess at least on the insertion side is designed complementary to the pin contour. 20. Rail construction according to one of claims 17 to 19, characterized in that the pin (111) is designed square, and that the fitting recess has a cross-section that corresponds to the cross-section of the square. 21. Rail construction according to claim 20, characterized in that the pin (111) is designed with a square cross-section, in particular a rectangular and preferably a square cross-section. 22. Bar construction according to one of claims 17 to 21, characterized in that the connecting element (113) has a slot (118) which extends essentially parallel to the fitting recess for the pin (111) and penetrates through it. 23. Bar structure according to claim 22, characterized in that the connecting element (113) in the slot area is designed to spread under a predetermined angle, much like an expansion bolt. 24. Rail construction according to claim 22 or 23, characterized in that the fitting bore for the pin (111) in the area of the slot (118) - when the connecting element (113) is inserted into the transverse hollow profile (102,103) - is narrower than at the inlet end of the pin ( 111). 25. Rail construction according to claim 17, characterized in that the taper of the fitting recess increases in the direction of insertion of the pin. 26. Rail construction according to claim 25, characterized in that the taper is essentially conical. 27. Rail construction according to one of claims 14 to 26, characterized in that the connecting element (113) is extended in width at the end which joins the cross profile (102,103). 28. Rail construction according to claim 27, characterized in that the connecting element (113) has an essentially conical expansion in width. 29. Rail construction according to one of claims 14 to 28, characterized in that the internally placed end of the connecting element (113) is designed to taper. 30. Rail construction according to claim 29, characterized in that the taper is essentially conical. 31. Rail construction according to one of claims 14 to 30, characterized in that the insertion openings (112) of the main hollow profile (101) comprise mutually flush holes in the narrow sides as well as recesses which join the holes in the insertion direction of the pin (111) and are designed in the wide sides of the main profile (101) . 32. Bar structure according to claim 31, characterized in that the holes are adapted to the cross section of the pin (111). 33. Rail construction according to claim 32, characterized in that the holes - in the case of a rectangular pin cross-section - are likewise rectangular. 34. Rail construction according to claim 32 or 33, characterized in that the holes in the main hollow profile (101) wide sides run U-shaped with the holes at the narrow sides, seen towards the wide sides. 35. Rail construction according to one of claims 32 to 34, characterized in that the width of the holes in the longitudinal direction of the main hollow profile (101) corresponds to the thickness of the pin (111). 36. Rail construction according to one of claims 32 to 35, characterized in that the height of the recesses perpendicular to the longitudinal direction of the main hollow profile (101) exceeds the thickness of the pin (111). 37. Rail construction according to one of the preceding claims, characterized in that the connecting elements (113) - for lateral fitting into the transverse hollow profiles (102,103) - are provided with grooves or grooves which serve to receive internal reinforcement ribs on the hollow profiles (101,102,103) , which is preferably produced by rolling. 38. Slat construction according to one of the preceding claims, characterized in that the connecting elements (113) have substantially flat, even gable surfaces which extend substantially perpendicular to the longitudinal direction of the transverse hollow profiles (102,103). 39. Rail construction according to one of the preceding claims, characterized in that the connecting elements (113) and their end portions have a contour which is adapted to the outer contour of the main hollow profile (101). 40. Rail construction according to one of the preceding claims, characterized in that in the gable side of the connecting element (113) which joins the main profile (101), next to the recesses for the pin (111), steps are designed which extend to the connection element's ( 113) upper and lower side, which degrees fit into side depressions in the outer side of the main hollow profile (101). 41. Rail construction according to one of the preceding claims, characterized in that the connecting elements (113) are designed with upper and lower fitting surfaces (114, 114') as well as side fitting surfaces (116), which surfaces are preferably provided with friction ribs that extend parallel to the front of the connecting elements gable side (121). 42. Rail construction according to claim 41, characterized in that said upper and lower fitting surfaces (114,114') as well as the sections (126) which are formed through their extension, are split up. 43. Rail construction according to claim 42, characterized in that the connecting element end sections are U-shaped, viewed against the narrow side of the side hollow profile (102,103). 44. Rail construction according to one of the preceding claims, characterized in that the connecting elements (113) are made of plastic, metal or wood. 45. Rail construction according to one of the preceding claims, characterized in that the insertion openings (112) for the pins (111) are sawn or milled out. 46. Rail construction according to claim 45, characterized in that the gable sides (121) of the connecting elements (113) which face the main profile (101), as well as the insertion openings (112) for the pin (111) - for non-right-angled placement of the hollow profiles (102,103) - is designed with a corresponding slope. 47. Rail construction according to one of the preceding claims, characterized in that the pins (111) consist of metal.