Protective grilles to cover openings and windows

Abstract

Protective screen (18), in particular an insect and / or pollen screen, for covering an opening, in particular a window and / or door opening, with a frame unit (20) and with a protective net (26) attached to the frame unit (20), wherein the frame unit (20) at least partially surrounds the protective net (26), characterized in that the frame unit (20) has a maximum cross-sectional thickness (58) of less than 8 mm, in particular less than 6 mm, preferably less than 5 mm, perpendicular to a principal extension plane of the protective net (26).

Description

State of the art

[0001] The invention relates to a protective grille according to the preamble of claim 1 and a window according to the preamble of claim 25.

[0002] It has already been proposed to mount insect screens outside of window or door frames. Such systems typically have a thick frame unit, as the spline and corner connectors are usually designed to ensure high structural stability. In particular, the connection points of the corner connectors are often robustly designed in the prior art to allow for a secure connection of the frame members. Furthermore, conventional spline strips require a certain depth to reliably fix the screen, which also leads to an increased frame thickness.

[0003] These design requirements result in a generally thick frame structure, which typically has to be mounted outside the window frame. A precise fit between the sash and the window frame is therefore not possible. Consequently, the installation effort is considerable, and the thick construction impairs user-friendliness.

[0004] The object of the invention is, in particular, to provide a generic device that offers greater user-friendliness while simultaneously requiring less assembly effort. This object is achieved according to the invention by the features of claims 1 and 16. Advantageous embodiments and further developments of the invention can be found in the dependent claims. Advantages of the invention

[0005] The invention relates to a protective screen, in particular an insect and / or pollen screen, for covering an opening, in particular a window and / or door opening, with a frame unit and with a protective net attached to the frame unit, wherein the frame unit at least partially surrounds the protective net.

[0006] It is proposed that the frame unit, perpendicular to a principal extension plane of the protective net, has a maximum cross-sectional thickness of less than 7 mm, in particular less than 6 mm, preferably less than 5 mm.

[0007] A reduced cross-sectional thickness of the frame unit is advantageous, resulting in increased user comfort. In particular, the protective grille is easier to handle and install. Furthermore, the reduced installation space allows the device to be mounted between the sash and frame of a window or door. The reduced cross-sectional thickness also enables more compact packaging for transport and shipping. Additionally, the product's reduced volume and weight contribute to lower shipping costs. Installation effort is also reduced. Moreover, the lower material usage allows for more cost-effective manufacturing, as less raw material is required and simpler production processes can be used.An opening is understood to be, in particular, a passageway that connects two separate areas and allows the passage of substances, radiation, or objects from one side to the other. An opening can thus be any type of passage, gap, channel, or recess that permits exchange or communication between two spatially separated zones. In particular, the opening is a building opening intended for the passage of air, light, or people. Preferably, it is an opening that includes a sash and a frame, for example, of a window or door. However, it is known to those skilled in the art that the term "opening" also encompasses other embodiments, such as ventilation openings, skylights, light wells, or similar structural openings that can be covered with a protective grille.The frame unit serves primarily as the supporting structure of the protective grille. The frame unit is preferably designed to hold the protective net and, in particular, to stabilize its position relative to the opening.

[0008] A frame unit is understood to be, in particular, a connection of several frame elements that together form a continuous or partially continuous structure. The frame unit is preferably continuous to ensure continuous stability and / or a positive-locking connection between the individual frame sections. Alternatively, the frame unit may be interrupted in sections, for example, to allow flexible or modular adaptation to different opening sizes. Preferably, the frame unit is made of a metallic material, in particular aluminum or steel. Particularly preferably, the frame unit is made of a polymer material, in particular PVC, ABS, or fiber-reinforced plastics. A combination of different materials is also possible.A protective net is understood to be, in particular, a planar element designed to at least partially prevent or limit passage through an opening. The protective net is specifically designed as an insect screen. Alternatively, it is also conceivable that the protective net is designed to prevent the ingress of other particles, such as pollen, dust, sparks, and / or fine dirt particles. Specifically, the protective net is designed to prevent unimpeded passage through the opening while still allowing air and / or light to pass through. The protective net is made of textile and / or plastic-based fibers, particularly fiberglass, polyester, polyethylene, and / or polypropylene. Preferably, the net has a fine mesh to retain particles with a small diameter.The mesh size is, in particular, less than 10 mm, preferably less than 5 mm, more preferably less than 2 mm, more preferably less than 1 mm, and most preferably less than 0.3 mm. The protective net is attached to the frame unit. Specifically, the protective net is attached by splicing, gluing, welding, clamping, guidance by means of a cord, and / or a magnetic holder. Preferably, the protective net completely surrounds the frame unit. A principal plane of extension of the protective net is understood to be, in particular, a plane that runs parallel to a largest side face of the smallest possible imaginary cuboid that completely encloses the frame unit and the protective net. Preferably, this plane passes through the geometric center of the imaginary cuboid.The cross-sectional thickness of the frame unit describes in particular the maximum distance between two opposing outer boundary surfaces of the frame unit, especially in a direction perpendicular to the main extension plane of the protective net.

[0009] Furthermore, it is proposed that the frame unit, in particular the frame struts of the frame unit, be arranged, preferably completely, between the sash frame of a door and / or window sash and the frame of a door and / or window opening. This advantageously results in reduced installation effort. Preferably, the protective grille can be installed and removed without tools. In particular, increased user-friendliness is achieved. Moreover, the frame unit is largely protected from external influences, especially dirt, rain, or UV radiation, by its sheltered position between the sash frame and the frame, thus extending the service life of the protective grille. Additionally, advantages arise regarding cleaning effort. The frame unit can also benefit from additional mechanical stability due to the supporting and guiding effect of the sash and / or frame.In particular, the additional stability allows the frame unit itself to be lighter and with thinner walls, especially without compromising overall stability. Accordingly, advantageous material and cost savings can be achieved. A frame brace is understood to be, in particular, an elongated structural element of a frame, preferably extending in a main direction. The frame brace is, in particular, linear, rod-shaped, profiled, and / or hollow. Specifically, the frame brace is designed as a load-bearing structural element that holds the protective net and absorbs its tension. Preferably, the frame unit comprises several frame braces that together form a continuous or partially continuous frame.The frame struts can be connected to each other via corner connectors or similar connecting elements to form a dimensionally stable, preferably right-angled, overall structure. Alternatively, it is also conceivable that they are formed in one piece with the corner connectors.

[0010] The term "arrangement of the frame unit between the sash of a door and / or window sash and the frame of a door and / or window opening" refers in particular to the fact that the frame unit is designed so that, especially when installed, it is completely or at least predominantly contained within the space formed between the sash and the frame. Specifically, the protective grille is designed to be inserted into the existing opening essentially flush with the sash and / or frame, particularly without substantially impeding the closing movement of the sash relative to the frame. The protective grille is preferably attached to a perimeter of the respective building opening, especially to a window and / or frame.Particularly preferred is an arrangement of the protective grille's frame unit on an inner frame surface concealed by the sash frame when closed. In particular, the protective grille can be connected to the frame via a detachable connection. Alternatively, the protective grille can be connected to the sash frame via a detachable connection. The connection is particularly material-bonded or magnetic. Alternatively, a force-fit or form-fit connection is also conceivable. For the purposes of this application, "provided" is understood to mean, in particular, that a component, device, or element is specifically programmed, designed, and / or equipped to perform a specific function.If it is stated that an object is intended for a specific function, this means in particular that this object fulfills and / or performs the stated function in at least one application and / or operating state.

[0011] Furthermore, it is proposed that the frame unit comprise at least one frame strut, having at least one keder profile, and a corner connector, in particular one that is at least partially elastically flexible, wherein the corner connector is specifically designed to at least partially fix the safety net. Advantageously, the frame strut with the keder profile results in an assembly-optimized frame unit formed from interconnectable components. In particular, the corner connector, which is designed to be at least partially elastically flexible, ensures increased user-friendliness, especially due to the simplified assembly of the frame unit.Advantageously, a functionally integrated frame unit can be provided by a design in which the corner connector is intended to at least partially fix the protective net, and the number of components can be reduced, which in particular leads to a reduction in manufacturing, delivery, and assembly costs. A frame strut is understood to be, in particular, a side section of a frame. In a preferred embodiment, the frame strut is, in particular, a longitudinal and / or transverse side of the frame unit. In particular, the frame strut is straight, specifically a straight section of the frame unit. In particular, the frame strut has a longitudinal extension, especially without a change of direction along its longitudinal extension.A frame brace is understood to be, in particular, a frame element with exactly one principal direction of extension, especially a frame element that does not extend around a corner of the frame unit, and in particular does not form an angled circumferential frame element. Alternatively, however, a frame brace is also conceivable that comprises a part of the frame unit and extends over at least two sides of the frame unit, and in particular is guided around a corner region of the frame unit. In particular, the frame brace comprises, at least partially, a plastic, in particular a thermoplastic, especially PVC, ABS, polyamide, polypropylene, or polyethylene. Alternatively, it is also conceivable that the frame brace comprises, at least partially, a metallic material, in particular aluminum, in particular an aluminum alloy, and in particular as an extruded profile.Alternatively, a frame strut is also conceivable, in particular made of steel, in particular made of stainless steel, in particular made of a coated metal material, in particular made of a composite material.

[0012] A corner connector is understood to be, in particular, a connecting element, especially for joining frame components in a corner area, and especially for forming a frame corner. The corner connector is specifically designed to interact with at least one frame member, particularly to define an angle. "At least partially elastically flexible" refers in particular to reversible deformation, especially under load during assembly, and especially to returning to its original shape after unloading. The corner connector is specifically designed to be elastic at least in sections, and in particular has both rigid and elastically flexible sections. Sections intended to perform an assembly function, especially to enable insertion, locking, pre-tensioning, and / or adjustment during assembly, are specifically designed to be elastic.In particular, the corner connector has rigid sections, especially for a dimensionally stable connection with the frame strut, and especially for permanent positioning within the frame unit. In particular, the corner connector has at least some elastic material, especially an elastomeric plastic, especially TPE, TPU, EPDM, or silicone. Alternatively, the corner connector has at least some rigid material, especially a thermoplastic plastic, especially ABS, polyamide, polypropylene, or polycarbonate. Alternatively, a corner connector is conceivable, especially as a multi-component component, especially as a component with elastic and rigid material areas, especially in the sense of a composite or overmolded component.The corner connector is specifically designed to at least partially fix the safety net, particularly in a predetermined position, especially relative to the frame unit. Fixing the safety net refers specifically to securing it against displacement and / or loosening, particularly through positive and / or force-fit interaction, especially between the corner connector and the safety net. Specifically, the corner connector is designed to connect the safety net to the frame strut, particularly without tools and in a detachable manner.

[0013] Furthermore, it is proposed that the frame strut and / or the corner connector be / are at least partially magnetic. This advantageously simplifies the assembly of the protective grille. In particular, it enables tool-free fastening of at least some components of the frame unit, especially for assembling and disassembling the protective grille. It also advantageously supports a reproducible arrangement, particularly through defined magnetic holding forces. Furthermore, it enables secure bearing fixation, particularly without mechanical fasteners. Finally, it advantageously reduces maintenance requirements. "At least partially magnetic" means, in particular, that at least one section of the frame strut and / or the corner connector has magnetic or ferromagnetic properties.The term "magnetic" means, in particular, that the section in question is designed to generate its own magnetic field, especially as a permanent magnet. The term "ferromagnetic" means, in particular, that the section in question is designed to be magnetizable, especially for interaction with a separate magnet. The term "ferromagnetic" means, in particular, that the section in question comprises a material that is magnetically attracted under the influence of a magnetic field. The term "at least partially magnetic" means, in particular, that the magnetic or ferromagnetic section is integrated into the frame strut and / or the corner connector, in particular by being embedded, cast in, or overmolded.Alternatively, it is understood in particular that the magnetic or ferromagnetic section is designed as a separate component, in particular permanently, in particular non-removably, and in particular by a material bond and / or a form-fit and / or a force-fit connection to the frame strut and / or the corner connector. In a particularly preferred embodiment, it is provided in particular that the frame strut and / or the corner connector have individual magnetic and / or ferromagnetic particles, in particular metallic particles, distributed in a base matrix of the component. In a particularly preferred embodiment, it is provided in particular that the magnetic and / or ferromagnetic particles are an integral part of the frame strut and / or the corner connector, in particular that they are incorporated into the material during a manufacturing process.

[0014] Furthermore, it is proposed that the corner connector incorporate a keder profile element designed to at least partially keder the safety net into the keder profile of the frame strut. Advantageously, the corner connector and frame strut can interact. In particular, this facilitates continuous fixation of the safety net, especially without additional fasteners. Advantageously, kedering the safety net into the keder profile of the frame strut, particularly using the corner connector, achieves a particularly advantageous, uniform tension distribution within the safety net. Simplified installation of the safety net is advantageously ensured. In particular, cost-effective manufacturing can be achieved, especially due to the continuous production of the frame strut.A corner connector's keder profile element is understood to be, in particular, a profile section designed to form a force-fit and / or form-fit connection with a keder profile, especially one that is at least largely complementary, and in particular the keder profile of the frame strut. Specifically, the corner connector's keder profile element has at least a partial cross-sectional enlargement, in particular an undercut-like cross-sectional enlargement. This cross-sectional enlargement is designed to form a force-fit connection with a keder profile of the frame strut, in particular through the interaction of the cross-sectional enlargement of the keder profile element with a corresponding receptacle of the frame strut's keder profile.The keder profile element is, in particular, at least partially elastic, especially such that elastic deformation is permitted when it is inserted into the keder profile of the frame strut. In particular, the keder profile element comprises, at least partially, a plastic material; specifically, the keder profile element is made of a plastic. Specifically, the keder profile comprises TPE, TPU, polyamide, polypropylene, or polyethylene. Alternatively, it is understood that the keder profile element is made of a composite material, in particular with elastic plastic sections and comparatively rigid plastic sections.

[0015] The term "inserting" refers in particular to the insertion of the keder profile element of the corner connector into the keder profile of the frame strut, especially by inserting, pressing in and / or sliding in, whereby in particular the carrying of the protective net arranged between the corner connector and the frame strut is understood to have taken place when the keder profile element is inserted into the keder profile of the frame strut, whereby in particular the clamping and fixing of the protective net is achieved by a cooperation of the keder profile element of the corner connector with the keder profile of the frame strut, in particular by a force-fit and / or form-fit connection.

[0016] Furthermore, it is proposed that the corner connector, when installed, protrude from the frame strut by a maximum of 2 mm, particularly by a maximum of 1 mm, and preferably by a maximum of 0.5 mm. The limited protrusion of the corner connector from the frame strut is particularly advantageous, allowing for a flush-mounted frame unit and, in particular, a compact design of the protective grille. The small projection of the corner connector also reduces the risk of collision with adjacent components, especially during the opening and closing of a window or door sash. "In the installed state" refers specifically to the protective grille in its intended position at an opening, particularly when positioned between a sash frame and a frame.In its assembled state, the individual components of the safety barrier are connected to one another, in particular the frame struts, the corner connectors, and the safety net. An assembled state is understood to mean, in particular, a state in which the safety barriers are completely joined, especially with a functional connection between the frame struts, corner connectors, and safety net. A corner connector protruding, in particular, means that a section of the corner connector extends beyond an outer contour of the frame strut, especially perpendicular to a principal extension plane of the frame unit. In particular, the frame strut has at least a certain cross-sectional thickness, specifically a cross-sectional thickness perpendicular to a principal extension direction of the frame strut, especially perpendicular to a principal extension plane of the safety barrier.In particular, the protective grille in an assembled state has a maximum cross-sectional thickness, in particular a maximum cross-sectional thickness perpendicular to the main extension plane of the protective grille, wherein in particular the maximum cross-sectional thickness of the protective grille is increased compared to the cross-sectional thickness of the frame strut, in particular by at most 2 mm, in particular by at most 1 mm, preferably by at most 0.5 mm.

[0017] Furthermore, it is proposed that the frame unit has at least one additional frame strut with a keder profile, in particular corresponding to the keder profile of the frame strut. The provision of a modular protective grille, especially with several separate frame struts, is particularly advantageous, especially in such a way that the individual frame struts are arranged parallel within a package, particularly to achieve advantageous packaging properties, especially with reduced installation space requirements and, in particular, with lower delivery costs. Flexible adaptation of the frame unit to different opening geometries, especially through the use of several independent frame struts, is particularly advantageous. Simplified manufacturing and storage are particularly advantageous, especially due to the uniformity of the keder profiles of several frame struts.A keder profile corresponding to the keder profile of the frame strut is understood to be, in particular, a keder profile that is essentially identical in its profile geometry, especially with regard to a receiving shape for a keder profile element or an edge area of ​​the safety net. A keder profile corresponding to the keder profile of the frame strut is understood to be, in particular, a keder profile that allows the safety net to be kedered in a similar manner, especially by insertion, pressing, and / or sliding.

[0018] Furthermore, it is proposed that the corner connector be designed to connect the frame strut to the other frame strut and / or the protective grille, particularly by means of a profile element. Connecting the frame struts via the corner connector facilitates simplified assembly of the frame unit, especially without the need for additional separate fasteners. The ability to connect the frame strut to the other frame strut and / or the protective grille also supports the functional integration of multiple fastening and holding functions within a single component. The interaction of the corner connector with multiple frame struts results in increased structural stability of the frame unit, particularly when the protective grille is under load.In a preferred embodiment, it is provided that the corner connector connects the frame strut to the other frame strut by means of the keder profile element, wherein the safety net is additionally fixed at the connection. In the preferred embodiment, it is provided that the safety net is arranged, and in particular clamped, between the keder profile element of the corner connector and the keder profile of the frame strut, particularly for a positive-locking and / or force-locking fixation of the safety net. In an alternative embodiment, it is provided that the corner connector connects only the frame strut to the other frame strut, in particular by means of the keder profile element.In this alternative embodiment, it is provided in particular that the safety net is fixed exclusively via a receptacle on the frame struts, specifically via a keder profile on the frame struts, and specifically without the corner connector being involved in fixing the safety net. In a further alternative embodiment, it is provided in particular that the frame strut and the subsequent frame strut are connected to each other, specifically via a receptacle on the frame struts. In this further alternative embodiment, it is provided in particular that the corner connector is intended solely for connecting and fixing the safety net to the frame strut, specifically by means of a keder profile element.

[0019] Furthermore, it is proposed that a longitudinal end of the frame strut facing the other frame strut be arranged butt-jointed to the other frame strut, preferably without overlap. This advantageously supports precise and accurate positioning of the frame unit, thereby ensuring simplified assembly. The preferably overlap-free butt joint arrangement of the longitudinal ends particularly promotes a compact and flat design of the frame unit, especially without protruding overlap areas. The butt joint arrangement of the frame strut to the other frame strut enables a defined geometric relationship between the frame struts. The overlap-free butt joint arrangement particularly supports a uniform outer contour of the frame unit, especially for the visually unobtrusive integration of the protective grille.A longitudinal end of the frame strut refers in particular to an end section of the frame strut along its main direction of extension, especially an end section of the frame strut. "Facing the other frame strut" refers in particular to an orientation of the longitudinal end of the frame strut towards the other frame strut, especially in the area of ​​a connection point of the frame unit. "Butt joint" refers in particular to a butt joint between the frame strut and the other frame strut, especially without overlapping the frame struts, whereby the frame struts are in direct contact, especially at their longitudinal ends. "Non-overlapping" refers in particular to the fact that the frame strut and the other frame strut have no overlapping sections.

[0020] In a preferred embodiment, it is provided in particular that the longitudinal end of the frame strut and the longitudinal end of the further frame strut are arranged abutting each other, especially to form a corner region of the frame unit. In an alternative embodiment, it is provided in particular that the longitudinal end of the frame strut is arranged abutting a side wall of the further frame strut. A side wall of the frame strut is understood in particular to be a lateral boundary surface of the frame strut, especially a surface that extends along a longitudinal dimension of the frame strut.

[0021] Furthermore, it is proposed that the longitudinal end of the frame strut and one longitudinal end of the other frame strut each have an angled cut surface, wherein the cut surfaces are designed such that the frame strut and the other frame strut, when their longitudinal ends are abutting, form a frame component angle, in particular of 90°, with each other. The angled cut of the longitudinal ends particularly facilitates a precise butt joint arrangement of the frame struts, especially with a defined angular reference. The design of the cut surfaces to form a defined frame component angle particularly supports reproducible manufacturing, especially continuous production, of the frame struts, particularly with consistent corner geometry.An angled cut surface is understood to be, in particular, a planar cut surface, especially a geometric plane, which has a normal, wherein the normal of the cut surface deviates from a principal direction of extension of the respective frame member by half a frame member angle. An angled cut surface is understood to mean, in particular, that the cut surface is not oriented parallel to the principal direction of extension of the frame member, especially to form a corner region of the frame unit. In particular, the frame member has two side walls, in particular an inner and an outer side wall, especially with respect to the frame unit in an assembled state, wherein, in particular, the inner side wall has a smaller longitudinal extent than the outer side wall.An inner side wall is understood to be, in particular, a side wall facing the protective net and / or the interior of the protective grille. An outer side wall is understood to be, in particular, a side wall facing away from the protective net and, in particular, associated with an outer side of the protective frame. Specifically, the cross-sectional surface of the frame strut and the cross-sectional surface of the other frame strut are geometrically aligned, especially to form a predetermined frame angle.

[0022] A frame section angle is understood to be, in particular, an angle formed between the frame strut and the next frame strut when their longitudinal ends are butted together. A frame section angle is understood to be, in particular, a corner angle of the frame unit, specifically determined by the orientation of the angled cut surfaces, the magnitude of which depends on the geometric design of the frame unit. In a preferred embodiment, the frame section angle is 90°. Alternatively, it is also conceivable that the frame section angle has a different magnitude, which depends, in particular, on the geometry of the frame unit.

[0023] Furthermore, it is proposed that the protective grille include at least one cutting template for defining the angled cut surface of the frame struts. Providing at least one cutting template for defining the angled cut surface of the frame struts particularly facilitates precise and reproducible production of the cut surfaces. Specifically, it enables simplified and error-minimized manufacturing of the frame strut, especially during manual processing. Providing at least one cutting template also allows for adjustment of the frame struts by the final installer, particularly for adapting them to a specific building opening, especially by precisely cutting the frame struts to size on site.A cutting template is understood to be, in particular, an aid, especially a tool or device, designed to define a cutting geometry, specifically for forming an angled cut surface of the frame strut. The cutting template has, in particular, a guide surface, especially for guiding a cutting tool. The cutting template is specifically designed to define an angle for forming the angled cut surface of the frame strut. The cutting template has, in particular, a surface contour that is at least partially complementary to a surface contour of the frame strut, especially to a surface contour of a keder profile of the frame strut. The surface contour of the cutting template is specifically designed to engage, at least partially, with the keder profile of the frame strut.The surface contour is specifically designed to define the orientation of the cut surface with respect to a main extension direction of the frame strut. The surface contour is specifically designed to guide the cutting template along the keder profile of the frame strut.

[0024] Furthermore, it is proposed that the frame unit comprises at least one frame strut and at least one corner connector, wherein a longitudinal end of the frame unit facing the corner connector and a side end of the corner connector facing the frame strut are butted together, preferably without overlapping with the corner connector. Advantageously, the non-overlapping arrangement allows for a reduced installation space. In addition, it simplifies assembly and ensures improved user-friendliness. A corner connector is understood to be, in particular, a connecting element designed to join two or more frame struts together. The corner connector serves, in particular, to create a defined angular relationship, preferably a right-angled connection, especially between the connected frame struts.The corner connector can be made from a single piece or from multiple parts. The corner connector can be made of metal, polymer, or fiber-reinforced material. A longitudinal end of the frame strut refers in particular to the end section located in the axial direction of the frame strut. The longitudinal end can have a flat and / or profiled end face. The term "butt joint" means in particular that two components, in particular the frame strut and the corner connector, are arranged relative to each other such that their longitudinal ends facing each other are directly adjacent, in particular without any significant overlap or contact between the components. The frame unit has in particular at least four frame struts and in particular four corner connectors. Preferably, the corner connectors and the frame struts are separate components.In one assembly step, the frame struts are arranged butt-fit, preferably without overlap, particularly on the respective, especially two, longitudinal sides of the corner connectors.

[0025] Alternatively, at least one corner connector is formed integrally with a frame member, wherein, in particular, the corner connector with the integrally formed frame member abuts, especially without overlap, a further frame member at a free longitudinal end. In a further embodiment, a frame member comprises, in particular, corner connectors arranged integrally on both sides, on the free longitudinal sides of which further frame members are arranged integrally. The term "overlapping" is understood to mean, in particular, that two components in a connection area do not have any material or profile sections that overlap each other or project into the space of the other. In particular, the frame member and the corner connector do not have any overlapping wall or profile sections in the axial direction.

[0026] Furthermore, it is proposed that the frame strut has a keder profile and that the corner connector has a keder profile that corresponds at least substantially to the keder profile of the frame strut. This advantageously ensures more cost-effective manufacturing of the protective grille. In particular, the use of similar profile geometries reduces the variety of component variants and enables standardized manufacturing, for example, through the use of identical extrusion or milling tools. Moreover, this results in advantageous properties with regard to simplified assembly. A keder profile is understood to be, in particular, a profile designed to hold a flexible or planar material, especially a mesh or film, securely, particularly along an edge or within a groove.The welt profile can, in particular, have a profile formed as a groove, channel, cove, or undercut. In this context, the phrase "at least substantially" means that any deviation from a predetermined geometric or functional value is less than 25%, preferably less than 10%, and particularly preferably less than 5% of the predetermined value.

[0027] Furthermore, it is proposed that the keder profile of the frame strut and the keder profile of the corner connector each extend in a purely linear fashion. This advantageously ensures simplified assembly, increased user-friendliness, and simplified manufacturing of the corner connectors and frame struts. In particular, improved fit accuracy when joining the frame strut and corner connector can be guaranteed. The term "purely linear" means, in particular, that the respective keder profile exhibits no curvature, bending, and / or deviation from a straight line along its longitudinal extent. Specifically, the keder profile runs in a single straight direction, particularly parallel to the axial direction of the respective frame strut or the leg of the respective corner connector.In particular, the keder profile of the corner connector is designed to be interrupted at least in sections, especially in the corner area of ​​the corner connector. A corner area of ​​the corner connector is understood to be, in particular, the section of the corner connector where two legs of the corner connector are connected to each other at a defined angle, preferably a right angle. The corner area thus forms the transition section between the legs and defines the geometric shape of the frame corner. Alternatively, the keder profile of the corner connector can be continuous and extend, in particular, over the corner area of ​​the corner connector.

[0028] Furthermore, it is proposed that the corner connector's keder profile has a longitudinal extent that is at least three times, preferably at least four times, or preferably at least five times the transverse extent of the corner connector's keder profile, and preferably the cross-sectional width of the corner connector in the immediate vicinity of a joint with the frame strut. This advantageously results in a robust, rigid connection between the frame strut and the corner connector. In particular, it advantageously reduces the installation space required for the frame unit. Specifically, transport and packaging costs can be advantageously reduced. Moreover, lower manufacturing costs can be ensured. In particular, this advantageously results in an optimized connection between the corner connector and the frame strut, as a sufficiently large bearing and contact area is achieved while maintaining a slim cross-sectional geometry.The longitudinal extension of the keder profile refers in particular to the extension of the keder profile along its main axis, especially in the axial direction of the frame strut.

[0029] The transverse extent of the keder profile refers in particular to the extension perpendicular to the longitudinal extent of the keder profile, specifically the distance between opposing boundary surfaces of the profile, which essentially corresponds to the maximum profile width. The transverse extent refers in particular to a direction that runs both perpendicular to the keder direction and, more specifically, perpendicular to the main extent of the keder profile.The corner connector's keder profile has a longitudinal extent that is at least three times, preferably at least four times, or particularly preferably at least five times, the transverse extent of the corner connector's keder profile. This ratio refers in particular to the maximum transverse extent of the keder profile, specifically the maximum width of the profile, measured in a direction perpendicular to both the keder direction and the main extent of the keder profile. The cross-sectional width of the corner connector refers in particular to the width of the corner connector in a cross-section perpendicular to the longitudinal extent. This dimension specifically refers to the width in the immediate vicinity of a joint with the frame strut.The joint refers in particular to the area where the longitudinal end of the frame strut connects directly to the side end of the corner connector. A close-range area is understood to be, in particular, an area that has a maximum distance to a reference element, a reference axis, or a reference point, which is preferably less than 10 mm, more preferably less than 5 mm, or generally less than 7%, preferably less than 5%, of the maximum main extent of the respective reference element.

[0030] Furthermore, it is proposed that the corner connector have a maximum cross-sectional thickness of less than 5 mm, particularly less than 4 mm. This advantageously allows for a space-saving yet stable connection between the frame unit and the corner connector. In particular, improved assembly reliability can be ensured. Moreover, increased user-friendliness is advantageously achieved. In particular, the corner connector has a maximum cross-sectional thickness of less than 10 mm, preferably less than 7 mm, particularly preferably less than 6 mm, particularly less than 5 mm, and most preferably less than 3 mm.

[0031] Furthermore, it is proposed that the frame strut, at least in the immediate vicinity of its joint with the corner connector, have a cross-sectional thickness that corresponds at least substantially to the cross-sectional thickness of the corner connector in the immediate vicinity of its joint with the frame strut. This advantageously allows for a precise and easy-to-assemble connection, particularly between the frame strut and the corner connector. In addition, a homogeneous transition geometry without protrusions or edges can be advantageously achieved, which makes it easier to align and join the components. This ensures increased assembly reliability and user-friendliness. Furthermore, the installation space required for the connection unit can be reduced, resulting in a more compact design for the frame unit.Cross-sectional thickness refers in particular to the maximum distance between two opposing outer surfaces of a component in a direction perpendicular to its main extent, and especially parallel to the keder direction.

[0032] In particular, when considering an imaginary, especially convex, envelope that surrounds the outer contours of the frame strut and the corner connector in the immediate vicinity of the joint, the envelope sections of both components are at least substantially identical. Specifically, the outer outlines of the frame strut and the corner connector form a continuous, especially tangential, transition geometry in the immediate vicinity of the joint, particularly without offsets or steps.

[0033] Furthermore, it is proposed that the frame strut, at least in the immediate vicinity of its joint with the corner connector, have a cross-sectional width that corresponds at least substantially to the cross-sectional width of the corner connector in the immediate vicinity of its joint with the frame strut. This results in improved user-friendliness and ensures greater assembly safety. A smaller installation space is also advantageous. Cross-sectional width is defined, in particular, as the maximum distance between two laterally opposing boundary surfaces of a component in a direction that runs perpendicular to the cross-sectional thickness and perpendicular to the longitudinal extent of the respective component. Specifically, the cross-sectional shape of the frame strut and the corner connector is at least substantially identical in the immediate vicinity of the joint.In particular, the corner connector has a plane of symmetry that extends perpendicular to the main extension plane of the protective net and along the keder direction.

[0034] Furthermore, it is proposed that the at least one corner connector or the at least one frame strut has a mounting tongue, in particular a one-piece design, wherein the mounting tongue is at least partially received by an adjacent component of the frame unit, in particular the at least one frame strut or the at least one corner connector, arranged butt-jointed. Advantageously, this ensures easier and more stable alignment between the corner connector and the frame strut.

[0035] In particular, this results in a simplified assembly process, especially since the components are held in the correct assembly position during the joining process. Furthermore, when connecting the components using the assembly tongue, displacement of the components relative to each other during insertion is prevented. Advantageously, a compact design can be achieved without impairing the functionality of the connection. An assembly tongue can be understood to be, in particular, a projecting, preferably flat section designed to be inserted into a corresponding receptacle or recess of an adjacent component, especially into the keder profile. The assembly tongue is specifically designed to align two components relative to each other during the assembly process and to enable positional fixation until a final connection is established.In particular, the mounting tongue is designed to be inserted into the area of ​​the keder profile or an adjacent guide groove. Specifically, the mounting tongue is connected to the corner connector, particularly by being molded on as a single piece. Alternatively, the mounting tongue can also be connected to the frame strut, particularly by being molded on as a single piece.

[0036] The term "one-piece" is to be understood in particular as being joined by at least a material bond, for example by a welding process, an adhesive bonding process, an injection molding process, and / or another process that would appear appropriate to a person skilled in the art, and / or advantageously as being formed in one piece, such as by being manufactured from a single casting and / or by being manufactured using a single- or multi-component injection molding process, and advantageously from a single blank. The mounting tongue has a thickness. The thickness of the mounting tongue refers in particular to the thickness in the piping direction. The thickness of the mounting tongue is in particular less than 5 mm, preferably less than 3 mm, more preferably less than 1 mm, and most preferably less than 0.5 mm. In particular, the mounting tongue is, in its basic form, essentially trapezoidal in cross-section.This includes, in particular, a planar, elongated tongue geometry whose lateral boundary surfaces are inclined towards each other and form a wedge-shaped insertion geometry. The width of the mounting tongue preferably increases towards the integrally or permanently connected component, especially the corner connector and / or the frame strut. In particular, the maximum width of the mounting tongue is at least equal to, and in particular greater than, the maximum width of the keder profile.

[0037] Furthermore, it is proposed that the diagonal width of the corner connector, running at a 45-degree angle from a corner area of ​​the corner connector, corresponds to a maximum of 1.5 times, and in particular a maximum of 1.4 times, the cross-sectional width of the corner connector. Advantageously, this ensures a smaller installation space while maintaining sufficient stability. Moreover, in an assembled state, particularly when positioned between the sash frame and the frame, the frame unit is largely concealed. The diagonal width of the corner connector is understood to be, in particular, the dimension between a corner point of the corner area and a point on the outer contour of the corner connector, measured along a line that runs, in particular, at an angle of 45 degrees to the longitudinal axes of the two legs of the corner connector.In particular, the diagonal width is the width of the corner connector in the corner area and defines its maximum extent along the bisector of the corner angle. Specifically, the corner connector does not have an additional connecting plate or reinforcing bridge between the two legs of the corner connector, which would primarily serve to stabilize it. The stability of the legs is ensured solely by the corner area of ​​the corner connector.

[0038] Furthermore, it is proposed that the frame unit include a keder strip which, in addition to clamping the safety net, is also designed to connect the frame strut and the corner connector. This simplifies assembly and, in particular, ensures secure fixation of the safety net to the frame unit. Moreover, it results in a more stable overall construction, as the keder strip simultaneously secures the safety net and provides a positive-locking connection between the frame elements. A keder strip is understood to be a connecting element that is attached to another component by being clamped into a corresponding keder profile.The connection is created in particular by inserting the keder strip into the keder profile and holding it there, with the component to be clamped located between the keder strip and the keder profile and fixed, in particular by clamping. The keder strip has, in particular, an axially extending profile which corresponds, in particular, to the complement of the respective keder profile of the corner connector and / or the frame strut. Specifically, the keder strip is designed to fix the safety net in the frame unit by inserting a section of the safety net's keder into the keder strip and, in particular, holding it between the keder strip and the keder profile when installed. Furthermore, the keder strip is designed, in particular, to perform an assembly function by acting, in particular, as a connecting element between the frame strut and the corner connector.In particular, the keder strip is designed to create a connection, especially a detachable one, between the corner connector of the frame strut and the protective grille.

[0039] Clamping the safety net refers in particular to a process in which the safety net is fixed between a keder strip and a complementary keder profile. The keder strip preferably comprises an elastically deformable material, especially a plastic or an elastomer. In particular, the keder strip comprises a thermoplastic elastomer (TPE), polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), silicone, or soft rubber. Alternatively, the keder strip can be made of a multi-component material, for example, with an elastic clamping section and a harder support area.

[0040] Furthermore, it is proposed that the keder strip be at least partially magnetic or ferromagnetic. This would ensure a simplified, detachable connection between the frame unit and the cover frame. In particular, it would allow for tool-free assembly and disassembly. This would also advantageously reduce assembly effort.

[0041] The term "magnetic" or "ferromagnetic" refers specifically to the fact that the keder strip is designed to form a magnetically attractive interaction with a separate magnetic or ferromagnetic mounting element. In particular, the keder strip is designed to form a magnetic connection when the protective grille is attached to a corresponding mounting element or to the frame itself. Specifically, the surface of the keder strip opposite the keder side, and especially the side facing away from the keder profile, is magnetic or ferromagnetic. The magnetic adhesion is directed towards the frame, while the side of the keder strip facing the protective mesh remains free of a magnetic connection for clamping or keder function purposes. In particular, the keder strip is magnetic or ferromagnetic throughout.Alternatively, the keder strip can be designed to be magnetic or ferromagnetic in sections, particularly along its main direction of extension, in order to achieve an adhesive effect in certain areas. In particular, the keder strip comprises a magnetic or ferromagnetic material, especially a plastic or elastomer filled with iron particles, ferrite, or magnetic powders. Alternatively, a magnetic coating can be provided, for example, in the form of an applied or cast-in magnetic foil or a magnetic strip element.As a further embodiment, it is conceivable that the keder strip has at least two different material sections, wherein at least one section is magnetic or ferromagnetic and at least one further section is provided for the clamping or clamping function of the protective net, wherein in particular the sections are connected to each other by material or form-fitting means.

[0042] Furthermore, it is proposed that the keder strip be designed to be at least partially elastically flexible and deformable. This will advantageously ensure greater ease of assembly. Additionally, it offers benefits in terms of user-friendliness. In particular, tolerances can be compensated for and dimensional deviations corrected. This results in a particularly advantageous, flush, and stress-free connection between the corner connector of the frame strut and the safety net. Moreover, the elastic deformability reduces the risk of damage or breakage during assembly and increases the durability of the connection.The term "elastically flexible" means, in particular, that the keder strip, or especially a portion thereof, is reversibly deformable under an externally applied force, particularly without permanent deformation, and that, especially after the force is released, the keder strip returns to its original shape, particularly automatically. The elastic deformability can be effective, in particular, in the direction perpendicular to the keder direction, especially radially, as well as along its longitudinal extent, especially axially. Preferably, the entire keder strip is elastically flexible. Alternatively, it is conceivable that only portions of the keder strip are elastically flexible, wherein, in particular, certain functional areas are designed to be elastically flexible through a multi-layer structure, while other functional areas exhibit higher stiffness, especially to maintain dimensional stability.

[0043] Furthermore, it is proposed that the protective grille include at least one magnetic or ferromagnetic frame mounting element, designed to be attached to the frame of a door and / or window opening, and designed to interact magnetically with at least one part of the frame unit, in particular a spline of the frame unit. This allows for simplified, quick, and precise attachment of the protective grille to the frame. Tool-free assembly and disassembly are also possible, reducing installation effort and improving user-friendliness.A frame mounting element is understood to be, in particular, a component designed to be attached to a frame, especially a door or window opening, and to act, in particular, as a magnetic or ferromagnetic counterpart to a corresponding section of the frame assembly. The frame mounting element has, in particular, complementary magnetic properties. The frame mounting element is, in particular, ferromagnetic if the frame assembly, especially the spline, is at least partially magnetic. The frame mounting element is, in particular, magnetic if the frame assembly, especially the spline, is at least partially ferromagnetic. In particular, the frame mounting element is designed to generate a magnetically attractive interaction with the frame assembly.The direction of action of the frame mounting element is preferably directed towards the protective grille, in particular towards the keder strip of the frame unit, so that in particular a magnetic holding force acts in the direction of the protective grille.

[0044] The frame mounting element is connected to the frame, particularly on the side facing away from the protective grille. Specifically, the connection between the frame mounting element and the frame is an adhesive bond. Alternatively, the connection between the frame mounting element and the frame can be achieved via a screw connection, a snap-fit ​​connection, a press fit, or a form-fit connection. The frame mounting element is made of an elastically flexible or easily deformable material, which allows for easy adaptation to the contours of the frame and, in particular, the compensation of manufacturing tolerances. The frame mounting element is made of a plastic or elastomer impregnated with magnetic particles. Alternatively, the frame mounting element has a ferromagnetic or magnetic coating.As a further embodiment, it is conceivable that the frame mounting element is not designed as a continuous element, but rather consists of a plurality of individual frame mounting elements arranged along the frame, which together magnetically hold the frame unit. Alternatively, the frame mounting element can be formed integrally with the frame, so that the magnetic or ferromagnetic property is directly integrated into the frame.

[0045] Furthermore, a window is proposed comprising a window sash, a frame, and a protective grille, wherein the protective grille is arranged, and in particular attached, between the sash frame and the frame. Advantageously, the protective grille can be installed and removed by an installer from inside the building, between the sash frame and the frame. Additionally, the protective grille is almost completely covered by the sash frame when installed. Furthermore, optimized stabilization of the frame assembly can be achieved. In particular, less rigidity of the frame assembly itself is required. In particular, more economical manufacturing can be ensured.

[0046] A window sash is understood to be, in particular, a movable, pivotable, or rotatable part of a window, which especially includes a sash frame and is designed to selectively close or open a window opening. The window frame is, in particular, an edge region of the window sash and, especially when closed, is at least partially in sealing contact with the frame. The frame is, in particular, the fixed frame part, which is attached, especially, to the building structure, particularly in a wall opening, and is designed, in particular, as a receiving structure for the window sash. The protective grille is preferably arranged in a plane between the sash frame and the frame, especially between the respective sealing elements of the window sash and the frame.The frame unit of the protective grille is designed in such a way that, despite its position between the sash frame and the frame, a tight seal between the two is maintained. In particular, due to the small cross-sectional thickness of the frame unit, preferably less than 7 mm, a complete or almost complete seal is maintained when closed.

[0047] In an assembled state, particularly in a closed position of the window sash, and especially with at least a partially sealed contact between the sash frame and the frame, the frame unit is largely concealed by the sash frame. Preferably, less than 70%, more preferably less than 90%, more preferably less than 95%, and most preferably less than 98% of the surface of the frame unit is visible in the closed state. Visibility here refers in particular to the surface of the frame unit projected in a direction perpendicular to the main plane of extension of the protective mesh. In particular, the described design is not limited to windows. Specifically, instead of windows, all types of building openings that have a frame and a movable, lockable frame section, in particular a sash frame, can be understood as being included.In particular, this can also include door openings in which a door leaf is connected to a fixed frame via a wing frame, wherein the frame unit of the protective grille is arranged and, in particular, attached between the wing frame and the frame of the door opening.

[0048] The arrangement according to the invention is not intended to be limited to the application and embodiment described above. In particular, the arrangement according to the invention may, to achieve a functionality described herein, comprise a different number of individual elements, components, and units than the number mentioned herein. Drawings

[0049] Further advantages will become apparent from the following description of the drawings. The drawings illustrate three exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0050] They show: Fig. 1 a window with a protective grille arranged between a frame and a sash in an open position, Fig. 2 A schematic exploded view of a section of a protective grille with a frame unit, a corner connector, a keder strip and a protective net, Fig. 3 a schematic sectional view of a section of the protective grille with a frame strut, a corner connector and a protective net inserted between a keder profile and a keder profile element, Fig. 4 A schematic side view of a cutting template with a complementary surface structure for receiving a frame strut and a guide surface, Fig. 5 a side view of a frame unit with attached cutting template for forming an angled cut surface on a frame strut, Fig. 6 an alternative embodiment of a protective grille in a partially assembled state with a frame strut and a corner connector, Fig. 7 a sectional view of a window with a protective grille arranged between a frame and a sash frame, with a spline and a frame mounting element, Fig. 8 Another alternative embodiment of a protective grille with a corner connector, which has a mounting tongue for aligning and fixing a frame strut. Description of the exemplary implementations

[0051] The Fig. Figure 1 schematically shows a window 10. The window 10 is in an open state. The window 10 has a frame 12. The window 10 has a sash 14. The sash 14 has a frame 16. The window 10 has a safety grille 18. The safety grille 18 has a frame unit 20. The frame unit 20 has frame struts 22. The frame unit 20 has corner connectors 24. The safety grille 18 has a safety mesh 26. The safety grille 18 has a frame mounting element 66. The frame mounting element 66 is connected above the frame 12. The frame mounting element 66 is connected to the frame via an adhesive bond 68. The frame mounting element 66 is magnetically connected to the frame unit 20. The frame mounting element 66 is detachably connected to the frame unit 20.The protective grille 18 is designed to be positioned between the frame 12 and the sash frame 16 when the window sash 14 is closed. The protective grille 18 is clamped between the frame 12 and the sash frame 16 when the window 10 is closed.

[0052] The Fig. Figure 2 shows a schematic exploded view of a section of a protective grille 18a. The protective grille 18a has a frame unit 20a. The protective grille 18a has a protective net 26a. The frame unit 20a has a frame strut 22a. The frame unit 20a has a further frame strut 72a. The frame strut 22a and the further frame strut 72a are made of a plastic. The frame strut 22a and the further frame strut 72a contain an iron component intended to form a magnetic connection. The frame unit 20a has a corner connector 24a. The corner connector 24a is elastic and flexibly deformable. The corner connector 24a is made of an elastic plastic. The frame unit 20a has a keder strip 52a. The frame unit 20a has a further keder strip 74a. The frame strut 22a has a keder profile 32a. The further frame strut 72a has a further keder profile 76a.The keder profile 32a is identical in design to the further keder profile 76a. The corner connector 24a has a keder profile element 78a. The safety net 26a is arranged between the frame strut 22a and the corner connector 24a. The safety net 26a is designed to be fixed to the frame strut 22a via the keder strip 52a. The corner connector 24a connects the frame strut 22a to the further frame strut 72a. The corner connector 24a connects the safety net 26a to the frame strut 22a. The corner connector 24a connects the safety net 26a to the further frame strut 72a. A longitudinal end 30a of frame strut 22a is arranged abutting a longitudinal end 100a of the further frame strut 72a. The longitudinal ends 30a and 100a each have an angled cut surface 80a. The cut surface 80a of the longitudinal end 30a of frame strut 22a is formed at an angle of 45°.The cut surface 80a of the longitudinal end 30a of the further frame strut 72a is formed at an angle of 45°. The frame strut 22a and the further frame strut 72a form a frame angle 82a with each other. The frame angle 82a is 90°.

[0053] The Fig. Figure 3 shows a schematic sectional view of a section of a safety barrier 18a. The safety barrier 18a is shown in its assembled state. The safety barrier 18a has a corner connector 24a. The corner connector 24a has a keder profile element 78a. The safety barrier 18a has a frame strut 22a. The frame strut 22a has a keder profile 32a. The safety barrier 18a has a safety net 26a. The safety net 26a is kedered into the keder profile 32a of the frame strut 22a by the keder profile element 78a of the corner connector 24a. The frame strut 22a has a cross-sectional thickness of 60a. The safety barrier 18a has a cross-sectional thickness of 58a. The cross-sectional thickness 58a of the protective grille 18a is a maximum of 1 mm greater than the cross-sectional thickness 60a of the frame strut 22a. The corner connector 24a projects a maximum of 1 mm beyond the frame strut 22a.

[0054] The Fig. Figure 4 shows a schematic side view of a cutting template 86a. Fig. Figure 4 shows a frame strut 22a. The frame strut 22a has a keder profile 32a. The cutting template 86a has a surface structure 88a. The surface structure 88a is complementary to a surface structure 90a of the frame strut 22a. The surface structure 88a is designed to partially accommodate the frame strut 22a. The surface structure 88a is designed to accommodate the surface structure 90a of the frame strut 22a. The surface structure 88a has a keder profile element 84a. The keder profile element 84a is designed to engage in the keder profile 32a of the frame strut 22a. The surface structure 88a has a recess 92a. The recess 92a is designed to accommodate an outer contour 94a of the frame strut 22a. The cutting template 86a has a first guide surface 96a. The cutting template 86a has a second guide surface 98a.The guide surfaces 96a and 98a are designed to guide a cutting tool. The guide surfaces 96a and 98a are designed to define an angle for forming an angled cut surface of the frame strut 22a.

[0055] The Fig. Figure 5 schematically shows a side view of a frame strut 22a with a cutting template 86a. The cutting template 86a is shown in an attached state on the frame strut 22a. The frame strut 22a has a keder profile 32a. The cutting template 86a is in contact with the frame strut 22a. The surface structure 88a of the cutting template 86a rests against the surface structure 90a of the frame strut 22a. The keder profile element 84a of the cutting template 86a engages with the keder profile 32a of the frame strut 22a. The recess 92a of the cutting template 86a receives an outer contour 94a of the frame strut 22a. The cutting template 86a is aligned relative to the frame strut 22a. The guide surface 96a specifies an angle for forming an angled cross-sectional surface of the frame strut 22a.

[0056] In the Fig. Figures 6 to 8 show exemplary embodiments of the invention. The following descriptions and drawings are essentially limited to the differences between the exemplary embodiments, whereby, with regard to identically designated components, particularly those with the same reference numerals, reference is also generally made to the drawings and / or the description of the other exemplary embodiments, in particular the Fig. 1 can be referenced. To distinguish the embodiments, the embodiments of the Fig. Numbers 6 to 8 have the letters b and c appended.

[0057] The Fig. Figure 6 shows an alternative embodiment of a protective grille 18b in a partially assembled state. The protective grille 18b has a frame unit 20b. The frame unit 20b has a frame strut 22b. The frame unit 20b has a corner connector 24b. The protective grille 18b has a safety net 26b. The corner connector 24b has a side end 28b facing the frame strut 22b. The frame strut 22b has a longitudinal end 30b facing the corner connector 24b. The longitudinal end 30b and the side end 28b are butted together. The longitudinal end 30b and the side end 28b are arranged without overlapping. The frame strut 22b has a keder profile 32b. The corner connector 24b has a keder profile 34b. The keder profile 32b of the frame strut 22b corresponds to the keder profile 34b of the corner connector 24b. The keder profile 32b of the frame strut 22b extends linearly. The keder profile 34b of the corner connector 24b extends linearly.The keder profile 34b of the corner connector 24b has a longitudinal extent 36b. The keder profile 34b of the corner connector 24b has a transverse extent 38b. The corner connector 24b has a cross-sectional width 40b. The longitudinal extent 36b is five times greater than the transverse extent 38b of the keder profile 34b. The longitudinal extent 36b is four times greater than the transverse extent 38b of the corner connector 24b. The frame strut 22b has a proximity to a butt point 42b with the corner connector 24b. The corner connector 24b has a proximity to a butt point 44b with the frame strut 22b. The close-range section 42b of the frame strut 22b has the same cross-sectional width 40b as the close-range section 44b of the corner connector 24b. The corner connector 24b has a corner section 46b. The keder profile 34b is interrupted in the corner section 46b. The corner connector 24b has a notch 48b in the corner section 46b. The corner connector 24b has a diagonal width 50b.The diagonal width 50b runs at a 45-degree angle. The diagonal width 50b is 1.4 times the cross-sectional width 40b of the corner connector 24b. The frame unit 20b has a keder strip 52b. The keder strip 52b has a keder profile 54b. The keder profile 54b of the keder strip 52b is complementary to the keder profile 34b of the corner connector 24b. The keder profile 54b of the keder strip 52b is complementary to the keder profile 32b of the frame strut 22b. The keder strip 52b is designed to clamp the safety net 26b. The keder strip 52b is designed to mount the frame strut 22b and the corner connector 24b together. The keder strip 52b is ferromagnetic. The keder strip 52b is elastically flexible and deformable.

[0058] The Fig. Figure 7 schematically shows a sectional view AA of window 10b. Window 10b has a protective grille 18b. Window 10b has a frame 12b. Window 10b has a sash 14b. The sash 14b has a sash frame 16b. The protective grille 18b is arranged between the frame 12b and the sash frame 16b. The protective grille 18b has a protective mesh 26b. The protective grille 18b has a frame unit 20b. The frame unit 20b has a maximum cross-sectional thickness 58b. The maximum cross-sectional thickness 58b of the frame unit 20b is perpendicular to a principal plane of extension of the protective mesh 26b. The maximum cross-sectional thickness 58b of the frame unit 20b is seven millimeters. The corner connector 24b has a maximum cross-sectional thickness 60b. The maximum cross-sectional thickness 60b of the corner connector 24b is five millimeters. The frame strut 22b has a maximum cross-sectional thickness of 62b.The maximum cross-sectional thickness 62b of the frame strut 22b is five millimeters. The maximum cross-sectional thickness 62b of the frame strut 22b corresponds to the maximum cross-sectional thickness 60b of the corner connector 24b. The protective grille 18b has a keder strip 52b. The keder strip 52b has a keder profile 54b. The corner connector 24b has a keder profile 34b. The keder profile 34b of the corner connector 24b has two undercuts 56b. The undercuts 56b are designed to fix the keder profile 54b of the keder strip 52b. The keder profile 54b of the keder strip 52b has two projections 64b. The projections 64b are designed to engage in the undercuts 56b of the keder profile 34b of the corner connector 24b. The keder profile 54b of the keder strip 52b is designed to complement the keder profile 34b of the corner connector 24b. The protective net 26b is clamped between the keder strip 52b and the corner connector 24b.The protective grille 18b has a frame mounting element 66b. The frame mounting element 66b is magnetic. The frame mounting element 66b is designed to establish a magnetic connection with the keder strip 52b. The frame mounting element 66b is designed to be attached to a frame 12b. The frame mounting element 66b is attached to the frame 12b via an adhesive bond 68b.

[0059] Fig.Figure 8 shows an alternative embodiment of a protective grille 18c. The protective grille 18c has a protective net 26c. The protective grille 18c has a frame unit 20c. The frame unit 20c has a frame strut 22c. The frame unit 20c has a corner connector 24c. The corner connector 24c has a mounting tongue 70c. The mounting tongue 70c has a trapezoidal geometry. The mounting tongue 70c is designed to be inserted into the keder profile 32c of the frame strut 22c. The mounting tongue 70c is designed to align the corner connector 24c and the frame strut 22c in a mounting position. The mounting tongue 70c is designed to fix the corner connector 24c and the frame strut 22c in a mounting position. The mounting tongue 70c is injection-molded onto the corner connector 24c. Reference sign 10 windows 12 bezel frames 14 window sashes 16 wing frames 18 protective grilles 20 frame units 22 Frame strut 24 corner connectors 26 safety net 28 End of the corner connector 30 Longitudinal end of the frame strut 32 Keder profile 34 Keder profile 36 Longitudinal extent 38 Transverse extension 40 Cross-sectional width 42. Close proximity of the impact point 44 Close area of ​​the impact point 46 Corner area 48 notches 50 diagonal width 52 Keder strip 54 Keder profile 56 Undercut 58 Cross-sectional thickness 60 Cross-sectional thickness 62 Cross-sectional thickness 64 lead 66 Frame mounting element 68 Adhesive bond 70 Mounting tongue 72 Additional frame strut 74 More keder strips 76 Further keder profile 78 Keder profile element 80 cutting area 82 frame angle brackets 84 Keder profile element 86 Cutting template 88 Surface structure 90 Surface structure 92 Exclusion 94 Outer contour 96 guide surface 98 guide surface 100 Longitudinal end of the further frame strut

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