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 with the features specified in the preamble of claim 1.

[0002] Such an insulating glass unit is known from DE 295 14 622 U1 and DE 197 09 154 A1. The insulating glass unit has a frame-shaped spacer consisting of a thermoplastic spacer strip and arranged between two glass panes. A muntin insert arranged between the glass panes has muntins formed from hollow profiles. The muntin insert, referred to as the muntin frame, is not fixed to the glass pane by means of the thermoplastic spacer, but separately by it. For this purpose, a muntin frame is used whose muntins are thinner than the predetermined distance between the glass panes of the insulating glass unit. The muntins have end pieces that are either as thick as the predetermined distance or compressible and slightly thicker than the predetermined distance between the glass panes.The length of the muntins, including their end pieces, is chosen to be 1 to 2 mm shorter than the clear width, measured along the length of the muntins, of the frame-shaped spacer strip extruded onto one of the glass panes. Furthermore, the end pieces of the muntins are designed to be adhesive on at least one side facing the two glass panes. A muntin insert prepared in this way is aligned with the spacer extruded onto one of the glass panes and inserted into the space enclosed by the spacer, and bonded to the glass pane in such a way that the end pieces do not touch the spacer. The second glass pane is then placed on the spacer, and the resulting semi-finished insulating glass unit is pressed together to establish the specified distance between the glass panes. This prevents the end pieces from being pressed into the spacer strip in a way that would cause it to become wavy.

[0003] An insulating glass unit 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 it to the spacer (tapered pins). The muntin end piece is first pressed into the inner side surface of the spacer string before it is attached to the muntins. A counter-holder, which does not adhere to the thermoplastic spacer, is placed against the side surface of the spacer string facing away from the muntin end piece to prevent deformation of the still-soft spacer string. At least one muntin holder per muntin is designed such that the muntin can be inserted into the holder with its end perpendicular to its longitudinal direction. During insertion, the muntin end piece stabilizes the spacer string.The free ends of the rungs therefore do not directly contact the spacer string, but rather the corresponding rung end piece, which is already anchored to the spacer string. The rung end acts directly only on the rung end piece, and not on the spacer string. This is intended to limit the introduction of forces into the thermoplastic spacer to a non-critical level.

[0004] From DE 10 2019 123 700 A1, an insulating glass unit is known in which the frame-shaped spacer is formed by layering two pasty spacer strands that subsequently harden, the combined height of which constitutes the height of the spacer. A spacer strand is applied to each of the two glass panes. Before the two glass panes are joined, a mullion frame is attached to the spacer strand of one of the glass panes. For this purpose, a T-shaped retaining element, viewed from the side, is attached to each mullion end. This retaining element is slightly pressed into a surface of the still-soft spacer strand that is parallel to the glass pane. In the finished insulating glass unit, the retaining elements of the mullion frame are then each half-embedded in one of the two spacer strands.

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

[0006] This problem is solved by an insulating glass pane with the features specified in claim 1, a device with the features specified in claim 4, and a method with the features specified in claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] The insulating glass unit according to the invention comprises at least two glass panes and a frame-shaped spacer made of a plastic-based material. The spacer and the muntin insert are arranged between the two glass panes. The spacer is formed by a pasty strand of a plastic-based material that subsequently hardens. A muntin insert is attached to the spacer.

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

[0009] In the inventive method, the spacer, consisting of a pasty and subsequently hardening spacer strand, is applied in a frame-like manner to a first glass panel. The spacer strand is a pasty and subsequently hardening spacer strand made of a thermoplastic material and / or a reactively cross-linking 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 target thickness. The pasty spacer strand is thus still hot and / or not yet fully hardened both during and after application, i.e., the material is still soft and easily plastically deformable. The mullion insert is placed into the still pasty material of the spacer strand, and the mullion end is embedded.After the spacer is applied to the first glass panel, at least a section of the still pasty spacer strip is bent outwards, towards the edge of the glass panel. The spacer strip is plastically deformed, increasing the clear internal dimension in this section of the frame-shaped spacer.

[0010] The embedding process involves inserting the muntin insert into the space enclosed by the frame-shaped spacer and bending back the raised spacer strip. At least one end of the muntin insert is pressed into the still-pasty spacer strip, causing the plastic-based material of the spacer strip to deform plastically. During embedding, the spacer strip material is pressed longitudinally into the open end of the muntin profile. After this indentation, a portion of the plastic-based material is located inside the hollow profile. The end of the muntin profile can be embedded more than 0.5 mm, and in particular 0.8 mm to 1.2 mm, deep into the spacer strip. The spacer thus holds the muntin insert in position directly and immediately above the embedded end of the muntin profile. The muntin insert can be positioned at a distance from both glass panes.After the end of the muntin bar is embedded in the spacer strip, a second glass pane is placed onto the frame-shaped spacer, so that the spacer and the muntin bar insert are located between the two glass panes. The space between the glass panes can be filled with a gas other than air in a manner known per se. A single spacer strip can be located on the first glass pane. No spacer strip can be located on the second glass pane. In particular, a single spacer strip can be applied exclusively to the first glass pane. The two glass panes of the insulating glass unit can be kept apart from each other, in particular, by a single spacer strip.

[0011] The device according to the invention for assembling insulating glass units includes 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, which is formed on a first glass panel by applying a pasty, subsequently hardening spacer strand along the edge of the glass panel. The device includes at least one bending device configured to plastically bend a spacer strand applied to a glass panel outwards. The bending device may include a bending tool movable towards the edge of the glass panel to deform a section of the spacer strand outwards. The device includes at least one bending device configured to plastically bend an opened spacer strand back into shape after a muntin insert has been inserted.The bending device can include a bending tool that can be moved towards the center of the glass panel to deform a section of the spacer strand inwards. This presses and embeds the end of a mullion insert positioned inside the spacer strand into the still-soft material of the spacer strand.

[0012] For decades, the prevailing opinion in expert circles was that a still-soft spacer strand made of a pasty material should not be deformed or subjected to forces after application to the first glass pane, so as not to impair the appearance of the spacer in the finished insulating glass unit. Therefore, any deformation of the spacer strand, as well as the introduction of forces acting laterally and / or parallel to the glass pane (forces not acting in the pressing direction of the two glass panes) into the still-soft material of the spacer strand, was avoided or minimized. Based on this assessment, the method described in DE 295 14 622 U1 was developed in 1995, in which mullion end pieces are used that do not touch the spacer strand. The solution developed approximately 10 years later according to DE 10 2004 043 581 A1 is still influenced by this view.The present invention has surprisingly demonstrated that the previously prevailing opinion is incorrect. Rather, by selectively bending the spacer strip upwards and backwards according to the present invention, insulating glass panes can be produced that have a very clean, neat, and visually appealing appearance. Contrary to expectations, the controlled deformation and subsequent embedding of the mullion end are easily and reliably manageable, particularly when a machine device according to the present invention is used.

[0013] The invention has further significant advantages: No end caps or muntin shoes are required. This simplifies the installation process when fitting the muntin insert. Inserting the muntin insert into the spacer can be easily automated. This ensures very precise positioning of the muntin insert within the frame-shaped spacer or the insulating glass unit. Embedding the muntin insert in the spacer allows it to be positioned between the two glass panes in such a way that the insert does not touch either pane. This is particularly advantageous if the glass panes have a coating on their inner surface. The embedded muntin end provides a visually appealing appearance. In particular, any length tolerances of the muntins are eliminated by embedding them in the spacer and are no longer visible.This allows for significantly larger tolerances in the muntin inserts, greatly simplifying and reducing the cost of their production. Once the spacer strand has fully cured, the muntin insert is firmly and securely fixed in the insulating glass unit, with no play whatsoever. Overall, the appearance and quality of insulating glass units with integrated muntin frames can be improved.

[0014] In one embodiment of the invention, the rung insert can have two rung ends facing the spacer, which are opposite each other and each formed directly by a rung profile. Both rung ends are embedded in the spacer, with plastic-based material of the spacer located inside the hollow profile at each rung end. 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 in 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 opposing sections of the spacer strand are bent outwards in such a way that the inner dimension increases at these points.When inserting the rung insert, the outer dimension of the two opposite rung ends is smaller than the increased inner dimension between the bent sections of the spacer strip. During embedding, the bent sections of the spacer strip are bent back to the inner dimension they were at before being bent. The rung insert can contain multiple rungs. Each rung can have a free end, which is formed by a rung profile and embedded in the plastic-based material of the spacer.

[0015] In a further embodiment, the spacer strand can have a rectangular cross-section and be applied to the first glass pane with one of its narrow sides. The spacer strand can have two opposing side surfaces, both oriented perpendicular to a plane of the first glass pane. An inner side surface faces the center of the glass pane. An outer side surface faces outwards towards the edge of the glass pane. A bending force is applied to one side surface of the spacer strand to plastically deform a section of the spacer strand outwards, particularly with the bending device. This primarily bends a section of the spacer strand spaced away from the glass pane outwards. The narrow side of the spacer strand adhering to the first glass pane remains undeformed.A bending force is applied to a side face of the spacer strip to plastically deform the bent section inwards, i.e., towards the center of the glass pane, particularly using the bending device. During bending, the spacer strip returns to its original shape, the one it had before bending, specifically its straight rectangular shape. The bending force and the bending force are both forces oriented along the plane of the glass, particularly compressive forces. The bending force and the bending force can be applied to opposite sides of the spacer strip. In particular, the bending force can be applied to the inner side face and the bending force to the outer side face of the spacer strip.

[0016] The device can have several stations for performing different work steps, in particular an application station. The application station is configured to apply a pasty, subsequently hardening spacer bead made of a plastic-based material along one edge of a glass pane. The glazing unit station is located downstream of the application station. The device can include a control unit that is coupled to the application station and the glazing unit station. The control unit is configured to control the stations for assembling an insulating glass unit. Each station has a horizontal conveyor on which the glass panes are transported upright, one after the other. Each horizontal conveyor is associated with a support wall against which the upright glass panes are supported, tilted a few degrees backward.

[0017] In the application station, a pasty, subsequently hardening spacer bead is applied along the edge of a stationary glass panel (the first glass panel) in a manner known per se. Thus, no pre-assembled spacer frame is placed on the glass panel. The spacer bead can be applied seamlessly along the edge of the glass panel. Only when a spacer bead is applied along the entire edge of the glass panel is a spacer frame formed to keep two adjacent glass panels apart. The application station can include an application head that can be guided along at least a section of the edge of the glass panel to apply the spacer bead. For this purpose, the application head can include a nozzle for extruding the pasty material into a spacer bead.After the application of the frame-shaped spacer, the first glass panel is conveyed upright from the application station to the mullion station.

[0018] The bending force and / or the bending force back can be controlled based on the temperature of the spacer strand. The control system can, for example, record the time of application of the spacer strand to the first glass panel as an electronic timestamp. The control system can then determine the time elapsed since the application of the spacer strand in the application station during both the bending and bending processes. From this, the control system can calculate the degree of hardening of the pasty material and the force required to plastically deform the spacer strand. The processing head can include a temperature sensor configured to detect the temperature of the spacer strand, particularly without contact. The temperature sensor is coupled to the control system.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, which includes a gripper with two clamping jaws. The distance between the clamping jaws is variable for gripping a mullion profile. The gripping movement of the clamping jaws extends along the support wall and / or along the glass panel. The gripper allows the mullion insert to be positioned parallel to the first glass panel in the space enclosed by the frame-shaped spacer. At this stage, the mullion ends do not yet touch the spacer assembly. The processing head also includes the bending device and / or the bending 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 position on the spacer assembly or the glass panel, in particular along and across the support wall of the mullion station.The machining head can be pivoted about an axis running transversely to the support wall. Depending on the path of the spacer string (vertical, horizontal, inclined, or curved), especially with non-rectangular model discs, the machining head can be rotated into the required position. In particular, the rafter station can contain several machining heads, for example, 8 to 12. This ensures the rapid installation of rafter inserts with many rafter ends to be embedded. The machining heads can be moved independently of one another. A group of machining heads can be moved together, especially by being arranged on a guide beam. This can simplify the drive and control of the machining heads.

[0020] In one embodiment, the machining head can include at least one positioning aid. The positioning aid is designed to position a rung insert between the clamping jaws. The positioning aid brings the rung insert into a predefined position relative to the clamping jaws before the insert is clamped by closing the gripper. This facilitates manual insertion of the rung insert into the gripper(s) by a machine operator. The positioning aid can be movable relative to the gripper. After the rung insert has been gripped, the positioning aid can be moved to a position in which it does not obstruct the further insertion process. The positioning aid can include a mounting plate. The mounting plate is oriented transversely to the rung profile. The mounting plate is displaceable relative to the gripper transversely to the support wall.This allows the mounting plate to be pushed out of the gripper's reach after the rung insert has been grasped. The positioning aid can include at least one guide finger, which is pivotable about an axis running transversely to the support wall. The guide finger can be displaceable transversely to the support wall relative to the gripper.

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

[0022] In a further embodiment of the invention, the bending device can include at least one blow nozzle, and in particular two blow nozzles. The bending force can be applied by applying a stream of blown air to the inner side surface of the spacer strand. This can lead to accelerated cooling of a spacer strand made of a thermoplastic material while it is still hot. This can increase the stiffness and / or load-bearing capacity of the pasty spacer strand when the muntin profile is embedded. This ensures that the spacer strand has sufficient strength after embedding to support the weight of the muntin insert without undergoing undesirable plastic deformation. The blown air stream enables contactless bending. Therefore, no unwanted impressions from a bending tool can form on the inner side surface of the spacer strand.The blowing nozzles can be attached to the clamping jaws and moved with them. This allows the size of the section of the spacer to be bent open to be adjusted to the cross-sectional size of the mullion profile. The direction of the blowing airflow can be oriented along the supporting wall or the glass plane, in particular parallel to it. The direction of the blowing airflow can also be oriented obliquely to the longitudinal direction of the spacer.

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

[0024] Further details and advantages of the invention are explained with reference to exemplary embodiments of the invention and the accompanying drawings. Identical and corresponding components are identified by matching reference numerals. The drawings show: Figure 1 is a perspective view of an insulating glass pane with a muntin insert according to the invention; Figure 2 is a partially cut-away front view of the insulating glass pane. Figure 1 Figure 3 shows an enlarged representation of area III of the Figure 2 Figure 4 shows a perspective view of a first glass panel of the insulating glass unit. 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 Figure 4 with inserted muntin bar, Figure 7 a front view of the glass panel made of Figure 6 Figure 8 shows a view of the glass panel cut along the cross-sectional surface VIII-VIII. Figure 7 Figure 9 shows an enlarged representation of area IX of the Figure 8 Figure 10 shows a perspective view of a schematically represented device for applying a spacer strip and inserting a mullion insert during the assembly of an insulating glass unit. Figure 1 Figure 11 shows a schematic front view of a rung station for the device of Figure 10 Figure 12 shows a first embodiment of a processing head for the rung station of the Figure 11 Figure 13 shows the machining head of the Figure 12 after grasping the rung insert, Figure 14, a similar view Figure 13 to a second embodiment of a machining head, Figure 15 a view similar Figure 13 on a third embodiment of a machining head.

[0025] In the Figures 1 and 2Figure 1 shows an insulating glass unit 1 according to the invention, comprising a first glass pane 2, a second glass pane 3, a frame-shaped spacer 4, and a muntin insert 5. The muntin insert 5 contains four muntin profiles 6. Each muntin profile 6 has an end 7 facing the spacer 4. The muntin profiles 6 are thin-walled hollow profiles. The muntin ends 7 are open at the front and embedded directly in the material of the spacer 4 (see Figure 1). Figures 2 and 3The mullion profiles 6, and thus also the mullion insert 5, are held in the spacer 4 without the use of mullion holders and / or mullion shoes. An outer dimension AM measured along the mullion profile 6 across two opposing mullion ends 7 is 1 mm to 2 mm larger than the corresponding clear inner dimension IM1 of the spacer 4. The spacer 4 is formed by a pasty, subsequently hardening strand 8 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 5The four bent sections 9 have an increased 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, an inner side surface 83, and an outer side surface 84. The spacer strand 8 is placed on the glass panel 2 with its narrow side 81, so that the side surfaces 83 and 84 are perpendicular to the 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 (see figure). Figure 9 After bending, the rung insert 5 is inserted into the spacer 4, see below. Figures 6 to 9Subsequently, sections 9 of the spacer strand 8 are bent back by a bending force FZ. This returns the spacer strand 8 to its original rectangular shape in sections 9, so that the spacer strand 8 runs continuously in a straight line in the finished insulating glass unit 1 in the area of ​​the mullion ends 7, cf. 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 thereby embedded, cf. Figures 2 and 3 . In this process, 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 10The schematic representation shows a device 10, often also referred to as a production line, for assembling the insulating glass unit 1. This device includes an application station 12 for the spacer strand 8 and a mullion station 14 for inserting the mullion insert 5. An intermediate station 16 serves as a transport section and / or intermediate storage between the application station 12 and the mullion station 14. A computer control 17 is coupled to the device 10 to control it as described. The application station 12 is configured in a manner known per se, for example according to DE 44 33 749 A1, for applying a pasty, subsequently hardening spacer strand made of a thermoplastic material to a glass pane and therefore does not need to be described in detail. In the application station 12, the spacer strand 8 is applied to the stationary glass pane 2 along its edge in a manner known per se.The application station 12 includes an application head 18, which is guided along at least one section of the edge of the glass panel 2 for application. The pasty spacer strand 8 hardens over time after being applied to the glass panel 2.

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

[0028] The sprouting 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 the Figure 11The depicted rung frame 5' with six intersecting rungs and twelve outwardly projecting rung ends 7 is described. The three machining heads 30, 32, 34 are arranged at the lower edge of the support wall 24 and are movable horizontally to the right and left. The two machining heads 36 and 38 are arranged at the left edge of the support wall 24 and are movable upwards and downwards parallel to the support wall 24. The rung station 14 includes a horizontal guide beam 40, which is movable upwards and downwards parallel to the support wall 24. The machining heads 31, 33, and 35 are arranged on the guide beam 40 and are movable horizontally to the right and left. The rung station 14 includes a vertical guide beam 41, which is movable horizontally to the right and left. The machining heads 37 and 39 are arranged on the guide beam 41 so as to be movable upwards and downwards parallel to the support wall 24.The rung station 14 contains several drives (not shown) coupled to the control unit 17 for the motorized movement of the guide beams 40 and 41 and the machining heads to the positions where the rung ends 7 of the rung insert 5' to be inserted are located. The machining heads 31, 33, 35, 37, 39 can each be pivoted about an axis oriented perpendicular to the support wall 24.

[0029] In the Figure 12 and 13 Figure 1 shows a first embodiment of a machining head 30. The machining head 30 includes a gripper 50 with two clamping jaws 51 and 52 and a bending device 60 with two blow nozzles 61 and 62. The blow nozzles 61 and 62 can be pressurized with compressed air. The exiting compressed air generates air currents that are Figure 12as indicated by arrows B. The clamping jaws 51, 52 are displaceable relative to each other along the double arrow C in order to perform a gripping movement by changing their distance from each other. The machining head 30 is displaceable along the double arrow D perpendicular to the support wall 24. The machining head 30 also includes a re-bending device 65 with a bending plate 66 and a positioning aid 70 with a mounting 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 between the positions shown by a controlled drive 76, 77 according to the Figure 12 and 13The extrusion plate 66 can be pivoted back and forth. It can be moved in the direction of arrow E relative to the clamping jaws 51, 52. A temperature sensor 67, coupled to the control unit 17, is located in the end face of the extrusion 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 11First, the clamping jaws 51 and 52 with the blow nozzles 56 and 57, without the inserted mullion insert 5', are moved in direction C to a distance corresponding to the desired length of the section 9 of the spacer strand 8 to be bent. Then, the processing heads 30, 31, 32, 33, 34, 35, 36, 37, 38, and 39, together without the inserted mullion insert 5', are moved in direction D towards the support wall 24 and the glass panel 2 abutting it. This brings the blow nozzles 56 and 57 into a position inside the spacer 4, where the airflow B can act on the inner side surface 83 and bend the spacer strand 8 outwards. The bending plate 66 is positioned 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 stream 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 outwards in ten sections 9. However, the rung insert 5' has twelve rung ends 7, cf. Figure 11 The machining 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 machining heads 36 and 37 are then returned to their original position. Figure 11 The height shown is retracted. All machining heads 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39 are moved away from the support wall and the glass panel 2 in direction D. The clamping jaws 51 and 52 are opened. The guide finger 72 and the mounting plate 71 are positioned in the Figure 12The guide finger 73 is still perpendicular to the mounting plate 71. In this position of the machining heads, the rung insert 5' is placed into the grippers 50. The rung insert 5' can be placed with its rung ends 7 onto the mounting plate 71 and pressed against the guide finger 72. Subsequently, the guide finger 73 is pivoted by 90° so that it is, as shown in Figure 12 The guide finger 73 is positioned parallel to the guide finger 72. The guide finger 73 is moved towards the guide finger 72 in direction D 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 close, the mounting 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. Figure 13This occurs in all machining 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, together with the mullion insert 5' held by the grippers 50, are moved in direction D towards the support wall 24 and brought close to the glass panel 2. In doing so, the mullion insert 5', oriented parallel to the glass panel 2, is moved transversely to the plane of the glass into the space enclosed by the frame-shaped spacer 4 until it reaches the Figures 6 to 9 The position shown has been introduced. The rung ends 7 do not yet touch the spacer strand 8, cf. Figure 9The extrusion 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 extrusion plates 61 are moved in direction E towards the clamping jaws 51, 52 in order to apply the bending force FZ to the outer side surface 84 and to bend back the raised sections 9, cf. Figure 9 and 13 . In this process, part of the material of the spacer strand 8 is pressed into the interior of the rung profile 6, so that the in Figure 3 The schematically depicted state results. Subsequently, the clamping jaws 51 and 52 of the machining heads 36 and 37 are moved apart in direction C. The machining 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 in the spacer strand 8 by bending back the bent sections 9. The mullion insert 5' is still held by the remaining processing heads. After all 12 mullion ends 7 of the mullion insert 5' have been embedded, 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 support wall 24. Subsequently, the glass panel 2 with the mullion insert 5' embedded in the spacer 4 is conveyed out of the mullion station 14 by the horizontal conveyor 20. The mullion station 14 is then free again and can insert the next mullion insert.

[0032] Figure 14Figure 1 shows a variant of the processing head 30 which contains no blow nozzles but instead a narrower extrusion bending plate 66'. The side of the extrusion bending plate 61' facing away from the clamping jaws 51, 52 acts as an upward bending device 60'. The side of the extrusion bending plate 66' facing the clamping jaws 51, 52 acts as a backward bending device 65'. The sections 9 of the spacer strand 8 are thus bent outwards through the extrusion bending plate 66' instead of by a blowing air stream. Figure 15 Figure 1 shows a variant of the processing head 30 in which the bending device 60" is formed by a suction device. The extrusion bending plate 66" has a suction opening 68 on its side facing the clamping jaws 51, 52. The spacer strand 8 can be drawn onto the extrusion bending plate 66" at its outer side 84 via the suction opening 68 in order to bend the section 9. Furthermore, the components in the Figure 14 and 15The variants shown are presented in a corresponding manner as in the Figure 12 and 13 The illustrated processing head 30 eliminates the need for a repeated description. Reference symbol list

[0033] 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' sprout insert 62 Blow nozzle 6 rung profile 65, 65', 65" Rebending device 7 shoot end 66, 66', 66" Extruded plate 8 spacer string 67 temperature sensor 9 Section 68 Suction opening 10 device 70 Positioning aid 12 Order station 71 Mounting plate 14 Sprout station 72 guide finger 16 Stopover 73 guide finger 17 steering 74 Swivel shaft 18 Application header 75 Swivel shaft 20 Horizontal conveyor 76 drive 21 Transport casters 77 drive 22 lower edge 81 first narrow side 24 retaining wall 82 second narrow side 30 Processing head 83 inner side surface 31 Processing head 84 outer side surface 32 Processing head 33 Processing head AM External dimensions 34 Processing head IM1 Internal dimensions 35 Processing head IM2 enlarged internal dimensions 36 Processing head B Airflow 37 Processing head C Direction of movement 38 Processing head D Direction of movement 39 Processing head E Direction of movement 40 Guide bars FA Bending force 41 Guide bars FZ Rebound force 50 Grabber

Claims

1. An insulating glass pane (1) comprising at least two glass sheets (2, 3), a frame-shaped spacer (4) and a glazing bar insert (5; 5'), wherein the glazing bar insert (5; 5') is mounted inside the spacer (4) between the two glass sheets (2, 3), and wherein 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), wherein at least one glazing bar end (7) is formed by a glazing bar profile (6) being formed as hollow profile, characterised in that the at least one glazing bar end (7) is embedded in the plastic-based material of the spacer (4) in such a way that part of the plastic-based material is present in the interior of the hollow profile.

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

3. An 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 associated internal dimension (IM1) of the frame-shaped spacer (4).

4. A device (10) for assembling an insulating glass pane (1) containing at least two glass sheets (2, 3), a frame-shaped spacer (4) and a glazing bar insert (5; 5'), wherein the device comprises a glazing bar station (14) which is configured for inserting a glazing bar insert (5; 5') into a pasty and subsequently solidifying spacer strand (8) which has been applied to a glass sheet (2) in the form of a frame along its edge, characterised in that the device (10) contains at least one bending-up device (60; 60'; 60") which is configured to plastically bend outwards a spacer strand (8) applied to a glass sheet (2), and in that the device (10) contains at least one bending-back device (65; 65'; 65") which is configured to plastically bend back a bent-open spacer strand (8) after insertion of a glazing bar insert (5; 5').

5. A 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-up device (60; 60'; 60") and / or the bending-back device (65; 65'; 65"), wherein the gripper (50) has two clamping jaws (51, 52), the distance between which is variable for gripping a glazing bar profile (6).

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

7. A device according to one of claims 4 to 6, in which the bending-up device (60') and / or the bending-back device (65; 65'; 65") contains at least one strand bending plate (66; 66'; 66").

8. A device according to one of claims 4 to 7, in which the bending-up device (60) comprises at least one blowing nozzle (61; 62).

9. A device according to one of claims 4 to 7, in which the bending-up device (60") is designed as a suction device, which has a suction opening (68) and is configured to pull on a spacer strand (8) by suction.

10. A method of assembling a first glass sheet (2), a frame-shaped spacer (4), a glazing bar insert (5; 5') and a second glass sheet (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 to a first glass sheet (2) in the shape of a frame; • after applying the spacer (4) to the first glass sheet (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-open 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 glazing bar end (7) in the spacer strand (8), a second glass sheet (3) is placed on the frame-shaped spacer (4) so that the spacer (4) and the glazing bar insert (5; 5') are located between the first glass sheet (2) and the second glass sheet (3).

11. A method according to claim 10, in which, in particular by using a bending-up device (60; 60'; 60"), a bending-up force (FA) is applied to a side surface (83) of the spacer strand (8) in order to plastically deform the spacer strand (8), wherein said side surface is orientated transversely to a glass plane of the first glass sheet (2).

12. A method according to claim 11, in which the bending-up force (FA) is applied by subjecting the spacer strand (8) to a flow of blown air (B).

13. A method according to one of claims 10 to 12, in which, in particular by using a bending-back device (65; 65'; 65"), a bending-back force (FZ) is applied to a side surface (84) of the spacer strand (8) in order to plastically deform the spacer strand (8), wherein said side surface is orientated transversely to a glass plane of the first glass sheet (2).

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

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

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