DE2061901A1 - Clamping device for plastic frames for windows and doors, in particular made of hard PVC - Google Patents

Description

Friedrich Schley

78 Freiburg / BrsKo 11 December 1970

Werderring 22

Clamping device for plastic frames . for windows and doors, especially made of beard PVC.

The invention relates to a clamping device for plastic frames for windows and doors, in particular from Hard-FVC, whereby the frame consists of individual frame pieces Eek welding can be assembled or made in a mold. .

According to the prior art, it is known to frame such Reinforce plastic windows in the window level by means of suitable metal profiles against wind pressure and against deformation as a result of thermal stresses.

The attachment to the structure takes place in such a way that the frame profiles in their longitudinal axis when exposed to heat can expand freely.

When arranging several window elements lying next to each other becomes a sliding connection, especially the vertical posts on the substructure or opposite provided for the building.

In another previously known fastening device the plastic frame on a supporting structure made of metal profiles that are attached to the building or to a surrounding one Frame mounted in such a way that occurring window and Body shell tolerances are compensated and the plastic frame when exposed to heat in the direction of the profile longitudinal axes can move.

Another previously known version of plastic windows made of hard FVG has one for stiffening in the hollow chamber the plastic profiles running on metal frames, with a force-fit corner connection of the metal profiles,

209827/0243 " ² "

whereby to absorb the thermal expansion when exposed to temperature elastic intermediate links, so-called compensation struts are provided, which causes the Plastic frame legs are opposite to the inner metal frame under the influence of temperature as a result of the deformation the so-called compensation struts expand freely or shorten.

It is also part of the state of the art that circumferential metal frames that are non-positively connected at the corners be provided with a cladding made of elastic, plasticizer-containing plastic profiles, which in turn are also welded or glued at the corners.

It is also known, the cladding of wooden frames by means of thermoplastic profiles, which on the Wooden frames are attached in a sliding manner to compensate for the different thermal expansion.

The disadvantages of the previously known frames for windows and doors made of hard plastics, especially hard PVG, consist in the fact that the executable length and width of the individual frame elements is limited by the thermal expansion that occurs with changing outside temperature the frame profiles and, in direct connection with them, the technically and economically feasible ones Sealing of the required expansion joints, especially between the frame and pane and between the individual ones Window elements.

The size of the slidably attached in the longitudinal direction of the Erofil Window elements are also limited by the fact that the frame is sagging as a result of thermal expansion the frame leg enters.

Finally, with the previously known attachment of the frame to circumferential metal profiles or to a frame

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Window size limited by the welded in Bending stress occurring in the corners of the plastic frame, as well as due to the stress on the material at the fastening points.

Another disadvantage of the prior art Windows and doors are made of hard plastic in the fact that when exposed to heat there is also a change in length of the sash frame profiles and thus an increase in size or reduction of the distances between the frame and sash frame. This increases the functional reliability the casement windows and the doors, in particular due to the influence of the locking devices of a certain wing size, significantly impaired

Particular difficulties arise from those mentioned above Reasons for the execution of window walls and continuous ribbon windows are that they are due to the Length of these window bands, the change in length that occurs when exposed to heat is subdivided into a large number of relative makes small window elements necessary to the occurring To reduce movements and forces to a tolerable level.

In the case of windows that are made of circumferential metal profiles and those with plasticized plastics, in particular Soft FVO are clad, difficulties arise with larger frame dimensions that the result of the Thermal expansion resulting pressure or tensile stresses Deformation of the plastic cladding causes cracks in this after a long period of use, preferably made of soft PVC produced cladding arise.

When rigidly fastening plastic frames to the building or a supporting structure, e.g. using dowels or screws, In particular with larger window dimensions, an impermissibly high embedment stress occurs in the bores on the plastic profile on, creating a secure attachment like this

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mounted plastic frame is in question.

The object underlying the invention is that made of plastic, in particular hard PVC To clamp and fasten frames for windows and doors in such a way that changes in length and deformations of this kind Plastic frames are prevented when exposed to heat, in order to create the possibility of any frame Manufacture width and height.

Both individually and assembled to run through window walls or ribbon windows, should be exposed to heat a safe, economically producible sealing of the existing joints and the functional reliability of the built-in wing.

According to the task of the invention, both an impermissible Stress on the plastic used for the frame prevented, as well as a material-appropriate utilization the structure and fasteners can be achieved.

A clamping device for plastic frames, in particular made of hard PVG, is used to solve the problem. with a reinforcement effective against wind pressure and heat deformation in the window level or one of these frames receiving or in the frame for simultaneous stiffening arranged supporting structure.

The clamping device is characterized according to the invention that the plastic profiles to be clamped are connected with clamping elements in the direction of their longitudinal axis which absorb the tensile and compressive forces that occur when exposed to temperature.

For the effective application of the clamping according to the invention, it is advantageous if the clamping is again one compared to the one for the plastic profile? verv-en <1 < ^! t «' ^j n material hu E-MoqnJ b <?;. iXz <-] j and the Einsp .-. nnoJ ciirnt e j'orm-

7 0 3 8 2 7/0 2 4 'J

BATH ORIGINAL

are firmly connected to the plastic profile.

According to the invention, it is also useful to set the ratio the sum of all projected areas IV of the positive connection to area F. of the plastic frame cross-section that are effective in the direction of tension and compression to choose that in the description below and in the claims specified conditions are met.

Bs can be useful, the form-fitting connection to produce by the fact that the frame profile with a reinforcement lying in the profile and the external supporting structure is connected by means of rivets or screws, or that a clamping element is used whose dotted line or ring-shaped elevations penetrate into the surface of the plastic profiles during the production of the connection. The required contact pressure can be achieved by the screw or Met connection can be generated or with arch or wedge-shaped design of the clamping element due to the spreading effect when making the connection.

According to the invention, it is advantageous to attach it to the plastic frame To provide recesses to accommodate the clamping elements, which are enclosed by the internal or external supporting structure to absorb the expansion forces.

It can also be advantageous in a further embodiment of the invention be that the recesses for receiving the wedge-shaped executed clamping element are wedge-shaped inwards or outwards, and that the plastic profile in the area of the recesses for receiving the clamping profile open to the outside isb.

It is also useful to have raised sections on the plastic profiles and indentations to be made perpendicular to the profile axis, which correspond to the teeth of the clamping elements, so that in each case in these elevations and depressions in the plastic frame corresponding indentations and elevations of the

Engage clamping element.

It is also an advantage according to the invention, the clamping learn to embed nt in the material of the plastic profile during its manufacture.

According to another idea of the invention, it is characteristic that the clamping element, together with the plastic profile connected to it in a form-fitting manner, is the actual Forms window or door frames and has the required profiling, e.g. for the window stop. Using the form-fitting connection, there is also a 3-part design of window and door frames Execution possible, wherein at least one of the two frames is made of plastic and where the Clamping element serves as a supporting structure.

According to the invention, the clamping element can be formed by a pull rod that extends in the longitudinal direction of the Plastic profile runs and engages the structure or the frame corner. For this it is advantageous to use the To provide the plastic profile with calibrated chambers. The tie rods can be designed as threaded rods

in
and the internally threaded holes or chambers are screwed into the plastic profiles. It can be advantageous to use self-tapping threaded bushings made of metal in the bores of the plastic profiles.

According to another identified feature of the invention is about the tie rods in the direction of the axis of the plastic profile ^ a bias applied such that also be L is the lowest profile temperature occurring in the course of the Jatires a compressive stress is generated in the longitudinal axis of the frame.

Another embodiment of the tie rods according to the invention is characterized by the fact that the tie rods have a grooved shape 7t.'rt.ieiungen are provided for anchoring in

209827/0243 -7-

the calibrated chambers of the plastic profiles. ,After Invention, the Zugstajagen can with a bigger one Be designed as the calibrated chambers in the plastic profile diameter, it is useful that such to press the executed tie rods into the calibrated chambers before welding the frame parts, for production the anchoring with the plastic profiles.

According to the invention, the pull rod can be designed as a tube which is attached at the ends by means of a spreading device The plastic profile is anchored in the calibrated chamber will. The pipes are expediently with the outside provided with knurling or circumferential grooves and Longitudinal slots at the ends to facilitate expansion through the spreader.

The anchoring of the tie rod in the calibrated chamber the plastic profile can advantageously also be made by means of disk spring-shaped disks.

The clamping device according to the invention is particularly Advantage applied to composite window elements, in particular to ribbon windows, wherein the clamping elements run over the entire length of the interconnected window elements to be clamped and either in connection with the building or a continuous structure, those that occur under the influence of temperature 2ug and absorb compressive forces. The effectiveness of the clamping elements is significantly influenced by the ratio the sum of all projected areas Ft of the form-fitting connection that are effective in the direction of tension and compression to the surface F. of the plastic frame cross-section, where the following in the description and in the claims conditions mentioned must be observed.

In this way, according to the invention, he ruled out window tape. will expediently stiffened against wind pressure by placing the frames next to one another between the vertical posts lying elements, columns -od <> r, ^ - HH ^ .- n plates between-

209827/0? /; : j '■ ".p _

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be switched, which are located above and below via suitable recesses in the upper and lower profiles of the structure or support the clamping elements inwards and outwards, but freely movable in the direction of the window cephala are.

In the case of ribbon windows or composite window elements that are installed in front of the facade, it can be important be, the supports or support plates screwed to the post of the individual elements on the structure via angles or To attach consoles. According to the invention, the effectiveness of the jig is improved when the ratio of the areas F. and F-r is related to the length of the individual elements and obeys the conditions set out below yet to be described.

According to the invention, window frames that are made of a hard plastic, for example, are made of hard PVC, the Effectiveness of the clamping device can be increased in that the clamping elements located in the plastic profile brought up close to the weld seam of the corner connection and with screws with which the tensile and compressive forces receiving structure are connected. Additional angle pieces can be placed on the inside to relieve the frame corners the frame is attached and connected to the clamping elements and the structure.

Further details and advantages of the invention are illustrated in FIGS. 1-35 in which various embodiments of the device according to the invention are shown in horizontal Sections and shown schematically in side views are explained in more detail:

1 and 2 show a vertical and horizontal section through a shown in simplified form Window frame, the form-fitting connection between the plastic frame O 5 and the clamping element (2).

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The axis A: A drawn in FIG. 1 is identical to the center of the frame profile to be clamped or of the window or ribbon of windows composed of individual elements to be clamped In the inventive positive connection between the plastic profiles (1) and the clamping elements (2), the change in length is prevented by a transverse contraction of the plastic profile (1) 1 corresponding voltages occur at the elevations (10).

In Fig. 2 is a cross section through the frame profile in the plane B: B shown in Fig. 1, with the frame profile (1) and the clamping element (2).

The symbols mean: F. = cross-sectional area of the plastic profile

(1)

'"f-r = h'b = contact surface of the form-fitting Connection per clamping point.

In addition,

F ₁ - = f _T ♦ f _T + f _T +
LL ₁ L ₂ Xi ₃

The following relationships also apply:

Compressive or tensile stress in the clamped plastic profile:

S _{9 n} = A t E ot = 65 Kp / cm ² for beard PVC

at t = 30 ° _o E = 2,7 '1O ⁴ KpZeIiL

■ oC = 0.8 × 10 ^-4

Permissible compressive stress at the clamping points:

Ä _T = 130 Kp / cm, empirical ^{value for hard PVC, 11} ZUl.

This results in F _{A =} J _{1 permi} > ₀ 5

-10-

209827/0243

This value only applies to rigid PVC and can be determined in the same way for other materials.

Jig. 3 and 4 show a jig, at the plastic profile (1) with a reinforcement (4) located within the frame profile by means of rivets (9) on the outside supporting structure (3) is positively connected, the attachment to the Baiiferk (7) takes place in this Exemplary embodiment using fastening straps (8) and dowels (5).

5 illustrates another exemplary embodiment the clamping device according to the invention with a clamping element (2) which is inserted between the plastic profile (l) and the structure (3) is inserted and the restraint of the plastic profile (1) caused by riveting (9) after the connection has been established.

The clamping element (2) can be designed in various ways be:

Fig. 6 shows a clamping element (2), which is advantageous from A tape is produced by embossing or punching, with perforations on one or both sides with sharp-edged Elevations (10) are generated which are pressed into the surface of the parts to be connected to one another.

Fig. 7 shows a clamping element (2) which can be produced by rolling, with one or both sides so-called diamond coating occurs with elevations (10).

Fig. 8 also shows a clamping profile (2) advantageously produced by rolling and having a tooth-like profile with elevations (10).

Fig. 9 and Fig. 10 show TJ or C-shaped profiled clamping elements with tooth-shaped longitudinal edges with elevations (10).

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209827/0243

Fig. 11 illustrates a clamping element (2), the Executed arc-shaped in cross section and advantageously made of tape, with tooth-shaped outer edges and ridges (10).

Fig. 12 shows a wedge-shaped clamping element (2) with tooth-shaped wedge surfaces on both sides and elevations (10) _e

In FIG. 13, a clamping device according to the invention is shown in section, using in cross-section "arcuate clamping elements (2) accordingly Fig. 11, in recesses (11) of the plastic profile (1) inserted and flat with screws (6) to generate the spreading effect and anchoring is deformed. To absorb the expansion forces, the profile cross-section in the area of the recesses (11) is from the structure lying within the plastic profile (1) enclosed.

14 shows another example of the application of the clamping device ^{according to the invention, analogous to FIG. 13, but with} wedge-shaped clamping elements (2), corresponding to FIG. is open to the outside.

Fig. 15 and Fig. 16 show an example of a plastic profile, which has elevations (12) and depressions (13) to produce the form-fitting connection, preferably for holding clamping elements with tooth-shaped Profiling like the clamping elements of FIGS. 8, 9 and 10. Of course, this profiling can also be used have a different cross-sectional shape.

FIGS. 17 and 18 show the example of plastic frames (1) which are preferably produced by pressing in a mold and where the clamping element (2) for locking

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209827/0243

Provide anchoring with the plastic profile with holes (35) is. As shown in FIG. 18, it can be advantageous to use such pressed plastic profiles as circumferential To fasten the frame on a supporting structure (3) that also runs around the circumference.

Fig. 19 shows a jig in which the Clamping element (2) with a plastic profile (1) connected to it in a form-fitting manner, the actual window or Forms the door frame, for which purpose the clamping profile in this application example has profile lugs (14) as a disc stop and a tooth-like profile, for example, for form-fitting anchoring with the plastic profile (1) at the connecting edges with elevations (10) against which the plastic profile (1) by means of one at its upper end wedge-shaped supporting structure (3), as well as an opposite one Wedge profile (36) is clamped by tightening the screws (6).

Fig. 20 shows a 3-part window or door frame with a clamping element (2), with, for example, tooth-like profiling and elevations (10) at the clamping points for the connection with the inner frame (15) and the outer frame (16), the locking force being generated by the insertion the wedge-shaped structure (3) and the wedge profile (36) by tightening the screws (6).

FIGS. 21 and 22 illustrate further exemplary embodiments using clamping elements (2) accordingly of Figure 9 · Figure 21 shows a 3-part Window frame or door frame with an internal supporting structure (3) with which the inner frame (15) and the outer frame (16) are fastened and clamped by the clamping elements (2) by means of screws (6).

Fig. 22 shows a two-part window frame in which the supporting structure (3) with profile lugs (14) as a pane attachment

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shock is equipped and on the means of the clamping elements (2) the inner plastic frame (14) attached . and is clamped.

FIGS. 23 and 24 show the construction of a clamping device by means of a tie rod (18), which takes over the function of the clamping element (2) and for this purpose as Threaded rod can be designed in a calibration. the chamber (19) of the plastic profile (1) is screwed in « As illustrated in Fig. 23, it may be advantageous to self-tapping threaded bushings (33) in the vicinity of the two Use frame corners, advantageously with different thread pitches and a fastening by a Mother (37). '

25 shows a plastic profile (1) with three, expediently calibrated chambers (19) arranged on the outer circumference of the frame for receiving tie rods (18), which can be fastened in the same way as described in FIG. 23 and the clamping of the plastic profile (1) take over «

26 and 27 show a jig with a plastic profile (1), corresponding to FIG. 25, at as shown in the examples, in the horizontal plastic profiles one tie rod in each of the two outer ones Chambers (19) run and, as shown in FIG. 27, a pull rod in the middle chamber of the vertical plastic profile (l). The tie rods are designed as threaded rods that extend over the outer end of the frame corners also run and expediently with the help of an angle piece relieving the corner connection (32) are clamped with nuts (37).

With the help of this clamping and depending on the tightening torque of the nuts, it is possible to preload in the direction

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2Q8827 / 0243

to apply the axis of the plastic profiles, in such a way, that even with the lowest erofilament temperature occurring in the course of the year, there is a compressive stress in the longitudinal axis of the erofil the frame is created so that length changes and impermissible stresses in the weld seam the frame corners cannot occur.

28 and 29 show a tie rod (18) with groove-shaped recesses (21) for anchoring the tie rods in the calibrated chambers (19) of the plastic profiles (1). Tie rods of this type are advantageous with a larger one Diameter designed as the chambers (19) in the plastic profile (1) and can be used before welding the frame parts be pressed into the calibrated chamber (19).

Fig. 30 shows a pull rod (22) which is tubular is executed and is inserted into the chamber (19) of the frame profile (1) for clamping, the tubular tie rod (22) is widened in the area of its ends (23) by means of a spreading device (3> 4) and is retained for better Anchoring a knurling or circumferential grooves (21) on its circumference. It is also useful for favoring the expansion of the pipe to attach longitudinal slots (25).

31 shows the clamping of a plastic profile (1) by means of a tie rod (18) which is positively locked in the chamber (19) by means of disc spring-shaped disks (26) is anchored in such a way that by tightening the nut (37) the disc spring-shaped washers (26) are spread apart and penetrate into the plastic profile (1).

32 shows the view of a according to the invention with a jig attached window tape in schematic form. The axis AiA represents the center of the composite window element or the ribbon window, from where in the directions C and D the force transfer

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must be carried out to absorb the thermal stresses (see comments on Fig. 1). It is according to the invention It is advantageous that the clamping elements (2) are connected to one another over the entire length of the elements to be clamped Window elements run and either in connection with the structure (7) or a continuous supporting structure (3), which, according to the invention, can also be designed as a clamping element, which occurs when exposed to temperature Absorb tensile and compressive forces. Here is that Ratio of the sum of all projected areas Fj- of the form-fitting that are effective in the direction of tension and compression Connection to surface F. of the plastic frame cross-section on the total length of the clamped window elements or Window bands, whereby the considerations in the description of Fig. 1 apply:

-L- O ₌ 0.5 for hard PVC.

Figs. 33 and 34 show the arrangement of supports or support plates (29) between the vertical posts (28) adjacent window elements (27), which above and below via suitable recesses (30) on the upper and lower profiles of the structure (3) or on the clamping elements (2), which serve as a supporting structure (3), support outwards and inwards, but in the direction of the window level are freely movable.

FIG. 35 shows the embodiment of FIG Ribbons to be installed in front of the facade. For this purpose, the individual elements (27) are attached to their vertical post (28) screwed to the support plates (29). The support plates (29) are above and below of the ribbon window attached to consoles (31), as well as the clamping elements (2), which in this case as Serving structure (3). The clamped in such a way - Window elements »using the - according to the invention - Clamping device ■ required conditions

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to refer to the length of the individual elements and accordingly so that to Pig. I set out the description.

Fig. 36 shows a detail from a ribbon window, the individual elements (27) of which are made from hard plastic, in particular from hard IVG. The in the frame located clamping elements (2) are brought up to close to the weld seam of the corner connection (17) and connected to the structure (3) by means of screws or rivets. Serve to relieve the corner connection (17) Elbows (32) on the inside of the frame corners (17), on the one hand with the supporting structure (3), on the other hand with the opposite angle (32) or with the outer one Support are connected by screws (6).

209827/0243

Claims (1)

Claims ί rr \ Binspannvorrichtung for plastic frame lor window jy \ and doors, in particular of rigid PVC, receiving with a plane from the wind pressure and heat deformation in the window effective stiffening or this frame or in the frame for simultaneous stiffener arranged supporting structure, characterized in that that the plastic profiles (1) to be clamped are connected in the direction of their longitudinal axis with clamping elements (2) which absorb the tensile and compressive forces that occur when exposed to temperature. 2. Clamping device according to claim 1, characterized in that the clamping elements (2) opposite one another the material used for the plastic profile (I) have a higher Ε module. 3 clamping device according to claim 2, characterized in that that the clamping elements (2) are positively connected to the plastic profile (1), 4. Clamping device according to claim 5, characterized in that the ratio of the sum of all projected areas F _{L of} the positive connection to the area F ^ of the plastic frame cross-section that are effective in the tensile and compressive direction:
F. S Z ₁ D Clamping device according to claims j and 4, characterized in that that the clamping element is represented by one produced by means of rivets or screws Connection of a reinforcement running in the frame profile (1) (4) with the external supporting structure (3). Clamping device according to claim J and 4, characterized in that that the form-fitting connection is established in that the clamping element (2) dotted line or ring-shaped elevations (10) formed in the surface when the connection is made - 18 - 20Ö827 / 0H3 penetrate the plastic profiles (1). 7β clamping device according to claim 6, characterized in that that the clamping element (2) is arcuate or wedge-shaped in cross section, with a Toothing (10) of the longitudinal edges, so that when the connection is made, the spreading effect prevents penetration the toothing (10) in the plastic profile (1) causes » 8. Clamping device according to claim 7> characterized in that that recesses (11) are made on the plastic frame to accommodate the clamping element (2) wherein the profile cross-section in the area of this recess (11) differs from the inside or outside of the plastic profile (1) lying structure (5) is enclosed to absorb the expansion forces. 9. Clamping device according to claim 8, characterized in that the recesses (11) for receiving the wedge-shaped clamping element are designed wedge-shaped inwards or outwards and that the plastic profile (1) in the area of the recesses (11) for receiving the clamping profile open to the outside is. 10. Clamping device according to claim 9, characterized in that the plastic profile (I) for production the positive connection with the clamping profile (2) perpendicular to the profile axis elevations and have recesses corresponding to the toothing of the clamping elements (2). 11. Clamping device according to claim 10, characterized in that that the frame profiles (1) in the area of the positive connection with the clamping element (2) perpendicular to the profile axis elevations (12) and depressions (13) in which the for production the positive connection existing elevations (lO) 209827/0243 and recesses (IJ) engages on the clamping element (2). 12. Clamping device according to claim 11, characterized in that that the clamping element (2) is embedded in the material of the plastic profile (1) during its manufacture will. 13. jig according to claims 1 to 12, characterized in that said clamping element (2) together with the front-positively connected to it plastic profile (1) forms the actual window or door frames, and for this purpose the required profile (14), for example, has for the disc stopper ₀ 14. Clamping device according to claim 13, characterized gekennv shows that the window or door frame is in 3 parts is carried out, with a clamping element (2), which serves as a supporting structure (3) and the form-fitting connection with the inner frame (15) and the outer frame (16), with at least one of the two frames from Plastic is made. 15 «clamping device according to claims 1 to 4, characterized in that the clamping element (2) is designed as a pull rod (18) which extends in the longitudinal direction of the plastic profile (1) runs and engages the supporting structure (3) or the frame corner (17). 16. Clamping device according to claim 15, characterized in that the plastic profiles (1) are calibrated Have chambers (19) for receiving the tie rods (18). 17. Clamping device according to claim 16, characterized in that that the tie rods (18) are designed as threaded rods and are fitted with internal threads Bores (20) are screwed into the plastic profiles (1). 27/0243 18. Clamping device according to claim 17, characterized in that in the bores (20) in the plastic profiles (l) Self-tapping threaded bushings / made of metal can be used to hold the tie rods (18). 19 · Clamping device according to claim 18, characterized in that a preload in the direction of the axis of the plastic profiles (1) is applied via the tie rods (18) such that compressive stress is generated in the longitudinal profile axis of the frame even at the lowest profile temperature occurring during the year _e a 20. Clamping device according to claims 1 to 16, characterized characterized in that the tie rods (18) with groove-shaped Wells (21) are provided which anchor the tie rod (18) in the calibrated chambers (19). 21. Clamping device according to claim 20, characterized in that the pull rod provided with grooves (21) (18) has a larger diameter than the calibrated chambers (19) in the plastic profile (l) and before welding the frame parts into the calibrated Chamber (19) is pressed. ^ 22. Clamping device according to claim 1 to 16, characterized * indicates that the pull rod is designed as a tube (22) which is attached to the ends (23) by means of a Spreading device (3 ^) i & the calibrated chamber (19) the plastic profile (1) or anchored in the structure (3) It is two-fold to close the tubes on the outside with knurling or with circumferential grooves (21) strand and make longitudinal slots (25) to facilitate the expansion of the tubes. 23. Maepacnvorrichtung according to claims 1 to 16, characterized in that the tie rod (18) in the calibrated chamber (19) of the plastic profiles (1) 209827/0243 is anchored by means of disc spring -shaped washers (26). 24 »clamping device according to claims 1 to 23, characterized in that in the case of composite window elements, in particular in the case of ribbon windows, the clamping elements (2) over the entire length of the interconnected window elements to be clamped run and either in connection with the structure (7) or a continuous structure (3) absorb the tensile and compressive forces that occur when exposed to temperature, with the ratio of the sum all projected effective in pulling and pushing directions Areas F ^ the form-fitting connection to Area F. of the plastic frame cross-section on the Total length of the clamped window elements or Ribbon windows can be obtained with a value: F -f>
I ' -T o, 5 for hard PVO. 25. Clamping device according to claim 24, characterized in that that for the production of ribbon windows the adjacent elements (27) on the vertical Post (28) with the interposition of supports or support plates (29) for stiffening against wind pressure are connected to each other. 26. Clamping device according to claim 25, characterized in that in the case of ribbon windows in the masonry opening lie or are mounted against masonry stop, the supports or support plates (29) above and below via suitable recesses (JO) on the upper and lower profiles of the structure (3) or the Support the clamping elements (2) outwards and inwards, but can move freely in the direction of the window plane. 27. Clamping device according to claim 26, characterized in that in the case of ribbon windows in front of the facade - 22 '209827/02 A3. of the structure (7) are to be installed, the supports or support plates screwed to the posts (28 of the individual elements) be attached to the structure via angles or brackets (31), and that each between two supports or Support plates (29) located elements (27) by clamping elements (2), based on the length of the individual element, according to the condition to obey claim (4) ■? 0.5 for hard PVO. 28. Clamping device according to claims 1 - 27, characterized in that provided that the Plastic profiles (1) made of a hard plastic, e.g. made of hard PVC, which are in the plastic profile (1) the clamping elements (2) located close to the weld seam of the corner connection and screwed (6) be connected to the supporting structure (3) which absorbs the tensile and compressive force. 29. Clamping device according to claim 28, characterized in that to relieve the frame corners (17), angle pieces (32) are connected on the inside of the frame with the clamping elements (2) and the supporting structure (3). 209827/0243