Insulating glazing with glazing bar insert and device and method for assembling same

Abstract

The invention relates to an insulating glass pane (1) comprising at least two glass panels (2, 3), a frame-shaped spacer (4), and a glazing bar insert (5; 5'), as well as a method and a device (10) for producing the same. The glazing bar insert (5; 5') is mounted within the spacer (4) between the two glass panels (2, 3). The glazing bar insert (5; 5') contains at least one elongated glazing bar profile (6) with a glazing bar end (7) facing the spacer (4). According to the invention, at least one glazing bar end (7) is formed by a glazing bar profile (6) designed as a hollow profile and is embedded in the plastics-based material of the spacer (4) in such a way that part of the plastics-based material is located inside the hollow profile.

Description

[0001] The invention relates to an insulating glass pane having the features specified in the preamble of claim 1.

[0002] Such an insulating glass pane is known from DE 295 14 622 U1. The insulating glass pane has a frame-shaped spacer consisting of a thermoplastic spacer strand and arranged between two glass panels. A muntin insert arranged between the glass panels has muntins formed from hollow profiles. The muntin insert, referred to as the muntin frame, is not fixed to the glass panel by means of the thermoplastic spacer, but rather separately from it. For this purpose, a muntin frame is used whose muntins are thinner than the specified spacing of the glass panel of the insulating glass panes. The muntins have end pieces that are either as thick as the specified spacing or compressible and slightly thicker than the specified spacing of the glass panels.The length of the glazing bars, including their end pieces, is selected to be 1 to 2 mm smaller than the clear width measured along the glazing bars of the frame-shaped spacer strand extruded onto one glass panel. In addition, the end pieces of the glazing bars are adhesively bonded on at least one side facing the two glass panels. A glazing bar insert prepared in this way is aligned with the spacer extruded onto one glass panel, inserted into the space enclosed by the spacer, and bonded to the glass panel so that the end pieces do not touch the spacer. The second glass panel is then placed onto the spacer, and the resulting semi-finished insulating glass pane is pressed to set the specified distance between the glass panels. The end pieces are not pressed into the spacer strand, which would otherwise cause the spacer to wavy. This prevents the spacer from becoming wavy.

[0003] An insulating glass pane of the type mentioned above with a thermoplastic spacer is also known from DE 10 2004 043 581 A1. A muntin holder designed as a muntin end piece is disclosed, which has means for anchoring to the spacer (tapered pins). The muntin end piece is first pressed into the inner side surface of the spacer strand before it is attached to the muntins. A counterholder, which does not adhere to the thermoplastic spacer, is placed on the side surface of the spacer strand facing away from the muntin end piece in order to prevent deformation of the still soft spacer strand. At least one muntin holder per muntin is designed such that the muntin can be inserted into the holder with its end transverse to its longitudinal direction. During insertion, the muntin end piece stabilizes the spacer strand.The free ends of the rungs thus do not directly contact the spacer strand, but rather the corresponding rung end piece, which is already anchored to the spacer strand. The rung end acts directly only on the rung end piece, not on the spacer strand. This is intended to limit the transmission of forces into the thermoplastic spacer to a non-critical level.

[0004] DE 10 2019 123 700 A1 discloses an insulating glass pane in which the frame-shaped spacer is formed by stacking two pasty and subsequently solidifying spacer strands, the combined height of which determines the height of the spacer. A spacer strand is applied to each of the two glass panels. Before the two glass panels are joined, a glazing bar frame is placed onto the spacer strand of one of the glass panels. For this purpose, a T-shaped retaining element, viewed from the side, is attached to each end of the glazing bar. This retaining element is slightly pressed into a surface of the still soft material of the spacer strand that is parallel to the glass panel. In the finished insulating glass pane, the retaining elements of the glazing bar frame are then embedded halfway into each of the two spacer strands.

[0005] The invention is based on the object of improving the quality of insulating glass panes with inserted glazing bar inserts and of creating a method and a device for assembling such insulating glass panes.

[0006] This object is achieved by an insulating glass pane having the features specified in claim 1, a device having the features specified in claim 4, and a method having the features specified in claim 10. Advantageous developments of the invention are the subject of the subclaims.

[0007] The insulating glass pane according to the invention comprises at least two glass panels and a frame-shaped spacer made of a plastic-based material. The spacer and the glazing bar insert are arranged between the two glass panels. The spacer is formed by a pasty and subsequently solidifying strand made of a plastic-based material. A glazing bar insert is attached to the spacer.

[0008] The rung insert has at least one rung with two ends configured for attachment to the spacer. The rung insert consists of at least a single rung. However, the rung insert can also contain an arrangement of several intersecting rungs. Such an arrangement is sometimes also referred to as a "rung frame." A rung can be formed by an elongated and / or extended rung profile. The rung profile is designed as a hollow profile. A rung can also be composed of several rung profiles. The rung profiles can be thin-walled hollow profile bars. The rung insert contains at least one elongated rung profile with one rung end facing the spacer.According to the invention, at least one rung end is formed by a rung profile designed as a hollow profile and embedded in the plastic-based material of the spacer in such a way that a portion of the plastic-based material is located inside the hollow profile. The elongated rung profile is embedded with its free end directly into the spacer strand. The hollow profile is open at the embedded rung end. During embedding, a portion of the plastic-based material of the spacer is thus pressed into the open rung end. The rung profile extends into the spacer. At the rung end, there is therefore a direct connection between the rung profile and the plastic-based material of the spacer. Therefore, neither a rung holder nor a rung end piece is used.

[0009] In the method according to the invention, the spacer is applied in a frame-like manner to a first glass panel from a pasty and subsequently solidifying spacer strand. The spacer strand is a pasty and subsequently solidifying spacer strand made of a thermoplastic material and / or a reactively crosslinking material. A method and a device for applying a plastic strand as a spacer are known from DE 44 33 749 A1. The spacer strand can be applied to the first glass panel with a predetermined desired thickness. The pasty spacer strand is therefore still hot and / or not yet fully cured both during and after application, i.e. the material is still soft and easily plastically deformable. The muntin insert is inserted into the still pasty material of the spacer strand and the muntin end is embedded.After applying the spacer to the first glass panel, at least a section of the still pasty spacer strand is bent outward, i.e., toward the edge of the glass panel. The spacer strand is plastically deformed, increasing the clear internal dimension in this section of the frame-shaped spacer.

[0010] Embedding occurs when the muntin insert is inserted into the space enclosed by the frame-shaped spacer and the bent-up spacer strand is bent back. At least one end of the muntin insert presses into the still pasty spacer strand and the plastic-based material of the spacer strand undergoes plastic deformation. During embedding, the material of the spacer strand is pressed into the open muntin end in the longitudinal direction of the muntin profile. After being pressed in, part of the plastic-based material is located inside the hollow profile. The muntin profile can be embedded at its end more than 0.5 mm, in particular 0.8 mm to 1.2 mm, deep into the spacer strand. The spacer thus holds the muntin insert in position directly and immediately above the embedded end of the muntin profile. The muntin insert can have a distance from both glass panels.After embedding the end of the glazing bar in the spacer strand, a second glass panel is placed on the frame-shaped spacer so that the spacer and the glazing bar insert are located between the two glass panels. The space between the glass panels can be filled with a gas other than air in a conventional manner. A single spacer strand can be located on the first glass panel. No spacer strand can be located on the second glass panel. In particular, a single spacer strand can be applied exclusively to the first glass panel. The two glass panels of the insulating glass pane can be kept at a distance from one another, in particular, by a single spacer strand.

[0011] The device according to the invention for assembling insulating glass panes contains a muntin station configured for inserting a muntin insert. The muntin station according to the invention is configured to insert a muntin insert into a frame-shaped spacer formed on a first glass sheet by applying a pasty and subsequently solidifying spacer strand along the edge of the glass sheet. The device contains at least one bending device configured to plastically bend a spacer strand applied to a glass sheet outward. The bending device can contain a strand bending tool movable toward the edge of the glass sheet in order to deform a portion of the spacer strand outward. The device contains at least one bending-back device configured to plastically bend back a bent spacer strand after inserting a muntin insert.The bending device can include a strand bending tool movable toward the center of the glass sheet to deform a section of the spacer strand inward. In doing so, a muntin end of a muntin insert positioned within the spacer is pressed into the still-soft material of the spacer strand and embedded.

[0012] For decades, the prevailing opinion among experts was that an uncured spacer strand made of a paste-like material should not be deformed and / or subjected to forces after application to the first glass pane, in order to avoid impairing the appearance of the spacer in the finished insulating glass pane. Therefore, any deformation of the spacer strand and the introduction of forces acting laterally and / or parallel to the glass pane (not in the pressing direction of the two glass panes) into the still soft material of the spacer strand have been avoided or minimized. Based on this assessment, the teaching described in DE 295 14 622 U1 was developed in 1995, in which bar end pieces are used that do not touch the spacer strand. The solution developed about 10 years later, according to DE 10 2004 043 581 A1, is still influenced by this opinion.The present invention has now surprisingly shown that this prevailing opinion is incorrect. Rather, by selectively bending the spacer strand up and back according to the present invention, insulating glass panes can be produced that have a very clean, tidy, and visually appealing appearance. Contrary to expectations, the controlled deformation and subsequent embedding of the glazing bar end can be easily and safely controlled, especially when a mechanical device according to the present invention is used.

[0013] The invention has other significant advantages: No muntin end pieces and / or muntin shoes are required. This simplifies the assembly process when installing the muntin insert. The insertion of the muntin insert into the spacer can be easily automated. This ensures very precise positioning of the muntin insert in the frame-shaped spacer or in the insulating glass pane. Embedding the muntin insert in the spacer allows the muntin insert to be positioned between the two glass panels in such a way that the muntin insert does not touch either glass panel. This is particularly advantageous if the glass panels have a coating on their inward-facing surface. The embedded muntin end offers a visually very appealing appearance. In particular, length tolerances of the muntins disappear and are no longer visible due to embedding in the spacer strand.This allows for significantly larger tolerances for the glazing bar inserts, making their production significantly easier and more cost-effective. Once the spacer strand has fully cured, the glazing bar insert is firmly and securely fixed in the insulating glass pane, particularly with zero play. Overall, the appearance and quality of insulating glass panes with the glazing bar frame installed can be improved.

[0014] In an embodiment of the invention, the rung insert can have two rung ends facing the spacer, which are opposite one another and are each directly formed by a rung profile. Both rung ends are embedded in the spacer, with plastic-based spacer material being located inside the hollow profile at both rung ends. The rung insert can have an outer dimension measured along the rung profile across the two rung ends, which is larger than the corresponding inner dimension of the frame-shaped spacer. The inner dimension is measured at the point on the spacer where the two opposite rung ends are embedded in the spacer strand. It corresponds to the clear inner dimension of the spacer. Two opposite sections of the spacer strand are bent outwards in such a way that the inner dimension is increased there.When inserting the rung insert, the outer dimensions of the two opposing rung ends are smaller than the enlarged inner dimension between the bent-up sections of the spacer strand. During embedding, the bent-up sections of the spacer strand are bent back to the inner dimension they existed before bending. The rung insert can contain multiple rungs. Each rung can have a free end formed by a rung profile and embedded in the plastic-based spacer material.

[0015] In a further embodiment, the spacer strand can have a rectangular cross-section and be applied with one of its narrow sides to the first glass panel. The spacer strand can have two opposing side surfaces, both of which are oriented transversely to a glass plane of the first glass panel. An inner side surface faces the center of the glass panel. An outer side surface points outwards towards the edge of the glass panel. A bending force is applied to a side surface of the spacer strand in order to plastically deform a section of the spacer strand outwards, in particular with the bending device. In this case, above all a region of the spacer strand spaced from the glass panel is bent outwards. The narrow side of the spacer strand adhering to the first glass panel is not deformed.A bending-back force is applied to a side surface of the spacer strand in order to plastically deform the bent-up section inward, i.e., toward the center of the glass panel, in particular using the bending-back device. During bending-back, the spacer strand is returned to its original shape, which it had before being bent, in particular to the rectilinear rectangular shape. The bending-up force and the bending-back force are each a force oriented along the plane of the glass, in particular a compressive force. The bending-back force and the bending-back force can be applied to opposite side surfaces of the spacer strand. In particular, the bending force can be exerted on the inner side surface and the bending-back force on the outer side surface of the spacer strand.

[0016] The device can have multiple stations for performing various work steps, in particular an application station. The application station is designed to apply a pasty and subsequently solidifying spacer strand made of a plastic-based material along an edge of a glass sheet. The glazing bar station is arranged downstream of the application station. The device can include a controller coupled to the application station and the glazing bar station. The controller is designed to control the stations for assembling an insulating glass pane. Each of the stations has a horizontal conveyor on which the glass sheets are transported upright, one behind the other. Each horizontal conveyor is assigned a support wall, against which the upright glass sheets rest, tilted backwards by several degrees.

[0017] In the application station, a pasty and subsequently solidifying spacer strand is applied in a conventional manner to a stationary glass panel, namely the first glass panel, along its edge. Therefore, no pre-assembled spacer frame is placed on the glass panel. The spacer strand can be applied seamlessly along the edge of the glass panel. Only when the spacer strand is applied along the entire edge of the glass panel is a spacer frame formed to keep two adjacent glass panels at a distance. The application station can include an application head that can be guided along at least a portion of the edge of the glass panel to apply the spacer strand. For this purpose, the application head can include a nozzle for extruding the pasty material into a spacer strand.After the frame-shaped spacer has been applied, the first glass panel is conveyed upright from the application station to the glazing bar station.

[0018] The bending force and / or the bending back force can be controlled based on the temperature of the spacer strand. The controller can, for example, record the time at which the spacer strand was applied to the first glass sheet as an electronic timestamp. The controller can then determine the time period that has elapsed since the spacer strand was applied in the application station during the bending and bending back processes. From this, the controller can calculate how far the pasty material has already hardened and what force must be applied to plastically deform the spacer strand. The processing head can contain a temperature sensor configured to detect the temperature of the spacer strand, in particular in a contactless manner. The temperature sensor is coupled to the controller.The control system can calculate the strength of a spacer strand made of a thermoplastic material from its temperature and control the tools accordingly.

[0019] In a further embodiment, the device can have at least one movable processing head containing a gripper with two clamping jaws. The distance between the clamping jaws can be varied to grip a muntin profile. The gripping movement of the clamping jaws runs along the supporting wall and / or along the glass panel. With the gripper, the muntin insert can be positioned parallel to the first glass panel in the space enclosed by the frame-shaped spacer. In this case, the muntin ends do not yet touch the spacer strand. The processing head also contains the bending device and / or the bending-back device, in particular both. The processing head thus forms an assembly with several processing tools, which as a whole can be moved to the required location on the spacer strand or the glass panel, in particular longitudinally and transversely to the supporting wall of the muntin station.The processing head can be pivoted about an axis running perpendicular to the retaining wall. Depending on the path of the spacer strand (vertical, horizontal, angled, or curved), particularly in the case of non-rectangular patterned panels, the processing head can be rotated into the required position. In particular, the glazing bar station can contain several processing heads, for example 8 to 12. This can ensure rapid installation of glazing bar inserts with many glazing bar ends to be embedded. The processing heads can be movable independently of one another. A group of processing heads can be movable together, particularly by arranging them on a guide beam. This can simplify the drive and control of the processing heads.

[0020] In one embodiment, the processing head can contain at least one positioning aid. The positioning aid is configured to position a rung insert to be inserted between the clamping jaws. The positioning aid brings the rung insert into a predefined position relative to the clamping jaws before the rung insert is clamped by closing the gripper. This makes it easier for a machine operator to manually insert the rung insert into the gripper(s). The positioning aid can be movable relative to the gripper. After gripping the rung insert, the positioning aid can be moved into a position in which it does not hinder the further insertion process. The positioning aid can contain a support plate. The support plate is oriented transversely to the rung profile. The support plate is displaceable transversely to the supporting wall with respect to the gripper.This allows the support plate to be pushed out of the gripper area after gripping the rung insert. The positioning aid can include at least one guide finger that can pivot about an axis running transversely to the supporting wall. The guide finger can be displaceable transversely to the supporting wall relative to the gripper.

[0021] The bending device and / or the bending-back device can contain at least one strand bending plate. The strand bending plate can be moved along the glass plane to plastically deform the spacer strand. The strand bending plate is movable relative to the clamping jaws to bend the spacer strand back. The direction of movement of the strand bending plate is oriented along the support wall and transversely to the gripping movement of the clamping jaws. The strand bending plate can be designed as a pressure plate to apply a compressive force to the spacer strand, in particular to its outer side surface. The strand bending plate can have a non-stick coating to prevent the pasty material of the spacer strand from adhering to the strand bending plate.

[0022] In a further embodiment of the invention, the bending device can contain at least one blowing nozzle, in particular two blowing nozzles. The bending force can be applied by applying a blast of air to the inner side surface of the spacer strand. This can lead to accelerated cooling if the spacer strand is still hot and made of a thermoplastic material. This can increase the rigidity and / or load-bearing capacity of the pasty spacer strand when embedding the glazing bar profile. This ensures that the spacer strand has sufficient strength after embedding to support the dead weight of the glazing bar insert without undergoing undesirable plastic deformation. The blast of air enables contactless bending. This prevents unwanted marks from a bending tool from forming on the inner side surface of the spacer strand.The blow nozzles can be attached to the clamping jaws and can be moved with them. This allows the size of the section of the spacer strand to be bent to be adapted to the cross-sectional size of the glazing bar profile. The direction of the blow air flow can be oriented along the supporting wall or the glass plane, particularly parallel to it. The direction of the blow air flow can be oriented obliquely to the longitudinal direction of the spacer strand.

[0023] In a further embodiment, the bending device can be designed as a suction device. The suction device can include a suction nozzle to suction the spacer strand onto its outer side surface. This also helps prevent unwanted marks on the inner side surface of the spacer strand.

[0024] Further details and advantages of the invention are explained using exemplary embodiments of the invention with reference to the accompanying drawings. Identical and corresponding components are provided with identical reference numerals. They show: Figure 1 is a perspective view of an insulating glass pane according to the invention with a glazing bar insert, Figure 2 is a partially sectioned front view of the insulating glass pane of the Figure 1 , Figure 3 an enlarged view of area III of the Figure 2 , Figure 4 a perspective view of a first glass panel of the insulating glass pane of the Figure 1 after applying a spacer strand, Figure 5 the glass panel of the Figure 4 after bending the spacer strand, Figure 6 the glass panel of the Figure 4 with inserted glazing bar insert, Figure 7 a front view of the glass panel from Figure 6 , Figure 8 a view of the glass panel of the Figure 7 , Figure 9 an enlarged view of area IX of the Figure 8 , Figure 10 a perspective view of a schematically illustrated device for applying a spacer strand and for inserting a glazing bar insert when assembling an insulating glass pane of the Figure 1 , Figure 11 a schematic front view of a rung station for the device of Figure 10 , Figure 12 a first embodiment of a processing head for the rung station of the Figure 11 , Figure 13 the processing head of the Figure 12 after gripping the rung insert, Figure 14 a view similar Figure 13 on a second embodiment of a machining head, Figure 15 a view similar Figure 13 to a third embodiment of a machining head.

[0025] In the Figures 1 and 21 shows an insulating glass pane 1 according to the invention, which comprises a first glass panel 2, a second glass panel 3, a frame-shaped spacer 4, and a glazing bar insert 5. The glazing bar insert 5 comprises four glazing bar profiles 6. Each glazing bar profile 6 has an end 7 facing the spacer 4. The glazing bar profiles 6 are thin-walled hollow profiles. The glazing bar ends 7 are open at the front and embedded directly into the material of the spacer 4, cf. Figures 2 and 3. The muntin profiles 6 and thus also the muntin insert 5 are therefore held in the spacer 4 without the use of muntin holders and / or muntin shoes. An external dimension AM measured along the muntin profile 6 across two opposing muntin ends 7 is 1 mm to 2 mm larger than the corresponding clear internal dimension IM1 of the spacer 4. The spacer 4 is formed by a pasty and subsequently solidifying strand 8 made of a plastic-based material, which is applied to the glass panel 2, cf. Figure 4 . In the area of ​​the rung ends 7 to be embedded, a section 9 of the pasty spacer strand 8 is plastically bent outwards by a bending force FA, cf. Figure 5. The four bent sections 9 have an enlarged inner dimension IM2, which is larger than the corresponding outer dimension AM. Before bending, the spacer strand 8 has a rectangular cross-section with a first narrow side 81, a second narrow side 82 as well as an inner side surface 83 and an outer side surface 84. The spacer strand 8 is placed with its narrow side 81 onto the glass panel 2 so that the side surfaces 83 and 84 run perpendicular to the glass plane of the glass panel 2. During bending, the rectangular cross-section of the spacer strand 8 is slightly distorted in section 9 because the spacer strand 8 adheres to the glass panel 2 with its narrow side 81, cf. Figure 9 . After bending, the rung insert 5 is inserted into the spacer 4, see. Figures 6 to 9. Subsequently, the sections 9 of the spacer strand 8 are bent back again by a bending force FZ. In the process, the spacer strand 8 is returned to its original rectangular shape in the sections 9, so that the spacer strand 8 in the finished insulating glass pane 1 again runs continuously in a straight line in the area of ​​the glazing bar ends 7, see. Figures 1 and 2 . When the sections 9 are bent back, the rung ends 7 are pressed into the still pasty spacer strand 8 and thus embedded, cf. Figures 2 and 3 . In this case, a part of the material of the spacer strand 8 is pressed into the interior of the open rung end 7, see in particular Figure 3 .

[0026] In Figure 101 schematically shows a device 10, often also referred to as a production line, for assembling the insulating glass pane 1. This device contains an application station 12 for the spacer strand 8 and a glazing bar station 14 for inserting the glazing bar insert 5. An intermediate station 16 is provided as a transport path and / or intermediate storage between the application station 12 and the glazing bar station 14. A computer control 17 is coupled to the device 10 in order to control it in the manner described. The application station 12 is set up in a manner known per se, for example according to DE 44 33 749 A1, for applying a pasty and then solidifying spacer strand made of a thermoplastic material to a glass sheet and therefore needs not be described in detail. In the application station 12, the spacer strand 8 is applied in a manner known per se to the upright glass sheet 2 along its edge.For this purpose, the application station 12 contains an application head 18, which is guided along at least a portion of the edge of the glass panel 2 for application. The pasty spacer strand 8 solidifies over time after being applied to the glass panel 2.

[0027] The device 10 contains one or more single-track horizontal conveyors 20, which are formed by a row with several drivable transport rollers 21. Such horizontal conveyors 20 are known per se. A glass sheet 2 rests on the horizontal conveyor 20 with its lower edge 22. Each of the stations 12, 14 and 16 has a supporting wall 24. The supporting wall 24 has, in a manner known per se, an angle of 6° to 8° to the vertical in order to support the glass sheet 2 leaning against it, which rests on the horizontal conveyor 20, and to prevent it from accidentally falling forward. The glass sheet 2 is in Figure 10from the left into the application station 12. The application head 18 applies the spacer strand 8 to the glass panel 2, so that the Figure 4 The glass panel 2 according to Figure 4 is conveyed by the horizontal conveyor 20 via the intermediate station 16 into the glazing bar station 14. In the glazing bar station 14, the glazing bar insert 5 is inserted in the manner described below. The glass sheet 2 is then conveyed further by the horizontal conveyor 20 into a pressing station (not shown) and joined together with the glass sheet 3 to form the insulating glass pane 1 in a manner known per se by placing the glass sheet 3 onto the narrow side 82 of the spacer strand 8 and filling the space between the glass sheets 2 and 3 with a gas other than air.

[0028] The sash station 14 according to the invention contains ten processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, the operation of which is described in Figure 11illustrated rung frame 5' with six intersecting rungs and twelve outwardly projecting rung ends 7. The three processing heads 30, 32, 34 are arranged on the lower edge of the supporting wall 24 and can be moved horizontally to the right and left. The two processing heads 36 and 38 are arranged on the left edge of the supporting wall 24 and can be moved up and down parallel to the supporting wall 24. The rung station 14 contains a horizontal guide beam 40 which can be moved up and down parallel to the supporting wall 24. The processing heads 31, 33 and 35 are arranged on the guide beam 40 and can be moved horizontally to the right and left. The rung station 14 contains a vertical guide beam 41 which can be moved horizontally to the right and left. The machining heads 37 and 39 are arranged on the guide beam 41 so that they can be moved up and down parallel to the supporting wall 24.The rung station 14 contains several drives (not shown) coupled to the control system 17 for motor-driven displacement of the guide beams 40 and 41 and the processing heads to the positions where the rung ends 7 of the rung insert 5' to be inserted are located. The processing heads 31, 33, 35, 37, 39 can each be pivoted about an axis oriented perpendicular to the support wall 24.

[0029] In the Figures 12 and 13 A first embodiment of a processing head 30 is shown. The processing head 30 contains a gripper 50 with two clamping jaws 51 and 52 as well as a bending device 60 with two blowing nozzles 61 and 62. The blowing nozzles 61, 62 can be pressurized with compressed air. The escaping compressed air generates blowing air flows, which in Figure 12are indicated by the arrows B. The clamping jaws 51, 52 are displaceable relative to one another along the double arrow C in order to carry out a gripping movement by changing their distance from one another. The processing head 30 is displaceable along the double arrow D perpendicular to the support wall 24. The processing head 30 further contains a bending device 65 with a strand bending plate 66 and a positioning aid 70 with a support plate 71 and two pivotable guide fingers 72 and 73. Each guide finger 72, 73 is fixedly mounted on a pivot shaft 74, 75. The guide fingers 72, 73 can each be moved by a controlled drive 76, 77 between the illustrated positions according to the Figures 12 and 13can be pivoted back and forth. The strand bending plate 66 can be moved in the direction of arrow E relative to the clamping jaws 51, 52. A temperature sensor 67 coupled to the controller 17 is arranged in the front side of the strand bending plate 66. The remaining processing heads 31, 32, 33, 34, 35, 36, 37, 38, and 39 are designed in the same way as the processing head 30.

[0030] Before inserting the rung insert 5' into the grippers 50, the processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved into the positions required according to the dimensions of the rung insert 5' in order to grip its rung ends 7, cf. Figure 11. First, the clamping jaws 51 and 52 with the blow nozzles 56 and 57 are moved in direction C without the inserted bar insert 5' to a distance which corresponds to the desired length of the section 9 of the spacer strand 8 to be bent open. Then, the processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved together in direction D without the inserted bar insert 5' to the supporting wall 24 and the glass panel 2 leaning against it. This brings the blow nozzles 56 and 57 into a position within the spacer 4 in which the blow air flow B can act on the inner side surface 83 and bend the spacer strand 8 outwards. The strand bending plate 66 thereby comes into a position in front of the outer side surface 84 and can detect the temperature of the spacer strand 8 there.Depending on the measured temperature, the pressure of the blown air flow B can be adjusted to adapt the bending force FA to the strength of the pasty spacer strand 8. The spacer strand 8 is then bent outward in ten sections 9. However, the rung insert 5' has twelve rung ends 7, see . Figure 11 . The processing heads 36 and 37 are therefore moved upwards to the required height and bend two further sections 9 of the spacer strand 8 outwards. The processing heads 36 and 37 are then moved back to the Figure 11 shown height. All processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved in direction D away from the supporting wall and the glass panel 2. The clamping jaws 51 and 52 are opened. The guide finger 72 and the support plate 71 are in the position shown in Figure 12shown position. The guide finger 73 is still perpendicular to the support plate 71. In this position of the processing heads, the rung insert 5' is inserted into the gripper 50. The rung insert 5' can be placed with its rung ends 7 onto the support plate 71 and pressed against the guide finger 72. Subsequently, the guide finger 73 is pivoted by 90° so that, as in Figure 12 shown, is parallel to the guide finger 72. The guide finger 73 is moved in direction D towards the guide finger 72 to ensure that the rung profile 6 rests against the guide finger 72. Positioned in this way by the positioning aid 70, the rung profile 6 is gripped by the clamping jaws 51 and 52. After the grippers 50 have closed, the support plate 71 is retracted in direction D and the guide fingers 72 are each pivoted by 90° so that they are parallel to the rung profile 6, see Figure 13This occurs in all processing heads, thereby achieving precise positioning of the rung insert 5' in the grippers 50.

[0031] Now the processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved together with the glazing bar insert 5' held by the grippers 50 in the direction D towards the supporting wall 24 and are brought closer to the glass panel 2. In this case, the glazing bar insert 5', which is oriented parallel to the glass panel 2, is moved transversely to the glass plane into the space enclosed by the frame-shaped spacer 4 up to the Figures 6 to 9 shown position. The rung ends 7 do not yet touch the spacer strand 8, see. Figure 9. The strand bending plates 61 move with the processing heads in direction D and are each located outside the outer side surface 84. The rung insert 5' is fixed in this position by the grippers 50, while the strand bending plates 61 are approached in direction E to the clamping jaws 51, 52 in order to apply the bending back force FZ to the outer side surface 84 and to bend back the bent sections 9, cf. Figure 9 and 13 . In this case, part of the material of the spacer strand 8 is pressed into the interior of the rung profile 6, so that the Figure 3 schematically illustrated state results. Subsequently, the clamping jaws 51 and 52 of the processing heads 36 and 37 are moved apart in direction C. The processing heads 36 and 37 are moved upwards to the rung ends 7 of the middle horizontal rung of the rung insert 5', cf. Figure 11, and embed these by bending back the bent sections 9 also into the spacer strand 8. The bar insert 5' is still held by the remaining processing heads. After embedding all 12 bar ends 7 of the bar insert 5', all grippers 50 are opened and all processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved away from the supporting wall 24. The glass sheet 2 with the bar insert 5' embedded in the spacer 4 is then conveyed out of the bar station 14 by the horizontal conveyor 20. The bar station 14 is then free again and can insert the next bar insert.

[0032] Figure 14shows a variant of the processing head 30 which does not contain blow nozzles but instead contains a narrower strand bending plate 66'. The side of the strand bending plate 61' facing away from the clamping jaws 51, 52 acts as a bending device 60'. The side of the strand bending plate 66' facing the clamping jaws 51, 52 acts as a bending-back device 65'. The sections 9 of the spacer strand 8 are thus bent outwards by the strand bending plate 66' instead of by a blowing air flow. Figure 15 shows a variant of the processing head 30, in which the bending device 60" is formed by a suction device. The strand bending plate 66" contains a suction opening 68 on its side facing the clamping jaws 51, 52. With the suction opening 68, the spacer strand 8 can be sucked onto the strand bending plate 66" on its outer side 84 in order to bend the section 9. Furthermore, the Figures 14 and 15shown variants in a manner similar to that shown in the Figures 12 and 13 shown processing head 30, so that a repeated description can be omitted. List of reference symbols 1 Insulating glass pane 51 clamping jaw 2 first glass panel 52 clamping jaw 3 second glass panel 60, 60', 60" Bending device 4 spacers 61 Blow nozzle 5, 5' rung insert 62 Blow nozzle 6 rung profile 65, 65', 65" Bending device 7 rung end 66, 66', 66" Extruded bending plate 8 spacer strand 67 Temperature sensor 9 Section 68 suction opening 10 device 70 Positioning aid 12 Application station 71 mounting plate 14 Rung station 72 Leading finger 16 stopover 73 Leading finger 17 steering 74 swivel shaft 18 Application head 75 swivel shaft 20 Horizontal conveyor 76 drive 21 Transport rollers 77 drive 22 bottom edge 81 first narrow side 24 retaining wall 82 second narrow side 30 machining head 83 inner side surface 31 machining head 84 outer side surface 32 machining head 33 machining head AM External dimensions 34 machining head IM1 Internal dimensions 35 machining head IM2 enlarged internal dimensions 36 machining head B Blown air flow 37 machining head C Direction of movement 38 machining head D Direction of movement 39 machining head E Direction of movement 40 Guide bar FA Bending force 41 Guide bar FZ Bending force 50 gripper

Claims

1. Insulating glass pane (1) comprising at least two glass panels (2, 3), a frame-shaped spacer (4) and a glazing bar insert (5; 5'), wherein the glazing bar insert (5; 5') is mounted within the spacer (4) between the two glass panels (2, 3), and wherein the glazing bar insert (5; 5') comprises at least one elongated glazing bar profile (6) with a glazing bar end (7) facing the spacer (4), characterized in that characterized in that ​ at least one rung end (7) is formed by a rung profile (6) designed as a hollow profile and is embedded in the plastic-based material of the spacer (4) in such a way that a part of the plastic-based material is located inside the hollow profile.

2. Insulating glass pane according to claim 1, in which the glazing bar insert (5; 5') has two glazing bar ends (7) facing the spacer (4) and opposite each other, each of which is formed by a glazing bar profile (6) designed as a hollow profile and embedded in the plastic-based material of the spacer (4), wherein at both glazing bar ends (7) plastic-based material of the spacer (4) is located inside the hollow profile.

3. Insulating glass pane according to claim 2, in which the glazing bar insert (5; 5') has an external dimension (AM) measured along the glazing bar profile (6) over the two opposite glazing bar ends (7), which is greater than the corresponding internal dimension (IM1) of the frame-shaped spacer (4). ​4. Device (10) for assembling an insulating glass pane (1) comprising at least two glass panels (2, 3), a frame-shaped spacer (4) and a glazing bar insert (5; 5'), the device comprising a glazing bar station (14) which is designed to insert a glazing bar insert (5; 5') into a pasty and subsequently solidifying spacer strand (8) which has been applied to a glass panel (2) in a frame-shaped manner along its edge, ​ ​ the device (10) contains at least one bending device (60; 60'; 60") which is designed to plastically bend outwards a spacer strand (8) applied to a glass panel (2), and ​ the device (10) contains at least one bending-back device (65; 65'; 65"), which is designed to plastically bend back a bent-up spacer strand (8) after insertion of a rung insert (5; 5').

5. Device according to claim 4, which has at least one movable processing head (30; 31; 32; 33; 34; 35; 36; 37; 38; 39) which contains a gripper (50) and the bending device (60; 60'; 60") and / or the bending-back device (65; 65'; 65"), wherein the gripper (50) has two clamping jaws (51, 52) whose distance from one another is variable for gripping a rung profile (6).

6. Device according to claim 5, in which the processing head (30; 31; 32; 33; 34; 35; 36; 37; 38; 39) contains at least one positioning aid (70) which is designed to position a rung insert (5; 5') to be inserted between the clamping jaws (51, 52).

7. Device according to one of claims 4 to 6, in which the bending device (60') and / or the bending-back device (65; 65'; 65") contains at least one strand bending plate (66; 66'; 66"). ​8. Device according to one of claims 4 to 7, in which the bending device (60) contains at least one blowing nozzle (61; 62).

9. Device according to one of claims 4 to 7, in which the bending device (60") is designed as a suction device which is equipped with a suction opening (68) to suck in a spacer strand (8).

10. Method for assembling a first glass panel (2), a frame-shaped spacer (4), a glazing bar insert (5; 5') and a second glass panel (3) to form an insulating glass pane (1), comprising the following steps: • the spacer (4) made of a pasty and subsequently solidifying spacer strand (8) is applied in a frame-like manner to a first glass panel (2); • after the spacer (4) has been applied to the first glass panel (2), at least one section (9) of the still pasty spacer strand (8) is bent outwards; • the glazing bar insert (5; 5') is inserted into the frame-shaped spacer (4) and the bent spacer strand (8) is bent back so that at least one glazing bar end (7) of the glazing bar insert (5) is pressed into the still pasty spacer strand (8);• after embedding the rung end (7) in the spacer strand (8), a second glass panel (3) is placed on the frame-shaped spacer (4) so ​​that the spacer (4) and the rung insert (5; 5') are located between the first glass panel (2) and the second glass panel (3).; 11. Method according to claim 10, in which, in particular with a bending device (60; 60'; 60"), a bending force (FA) is applied to a side surface (83) of the spacer strand (8) oriented transversely to a glass plane of the first glass panel (2) in order to plastically deform the spacer strand (8).

12. Method according to claim 11, in which the bending force (FA) is applied by subjecting the spacer strand (8) to a blast air flow (B).

13. Method according to one of claims 10 to 12, in which, in particular with a bending-back device (65; 65'; 65"), a bending-back force (FZ) is applied to a side surface (84) of the spacer strand (8) oriented transversely to a glass plane of the first glass panel (2) in order to plastically deform the spacer strand (8).

14. Method according to one of claims 10 to 13, in which the bending force (FA) and / or the bending back force (FZ) is controlled based on the temperature of the spacer strand (8).

15. Method according to one of claims 10 to 14, in which the spacer strand (8) is plastically deformed during bending and / or bending back with a strand bending plate (66; 66'; 66").​

Images