Plug connector, composite panel comprising a plug connector, and scaffolding system

Abstract

The invention relates to a plug connector (30) for connecting two panel elements (100) for a scaffolding system (1000), wherein the plug connector (30) has: a base plate (310) having a fixing region (300) and a first insertion region (301), wherein an arrangement direction from the fixing region (300) to the first insertion region (301) defines a first insertion direction (303) of the plug connector (30) for insertion into a frame element of one of the panel elements (100); a first fastening opening (313) for a first securing element (102); at least one first stop element (330) in the fixing region (300) on a first main surface (311) of the base plate (310), wherein the first insertion region (301) and a first part of the fixing region (300) together with a first part of the first stop element (330) form a first connection region (31) for the panel element (100). The invention also relates to a composite panel (200) and to a scaffolding system (1000).

Description

PLUG CONNECTOR, COMPOSITE PANEL COMPRISING A PLUG CONNECTOR, AND SCAFFOLDING SYSTEM A plug connector for connecting panel elements for a scaffolding system, a composite panel comprising at least two panel elements and a scaffolding system comprising a composite panel are specified. For scaffolding systems, so-called enclosure panels are known, which can be attached, for example, to the outer side of a scaffold, climbing formwork, or a building under construction or restoration to enclose the scaffolding or the building under construction or restoration, and which can serve safety purposes as well as provide visual privacy and / or protection against environmental influences such as wind and solar irradiation. Such enclosure panels are typically installed using screw fasteners or by clamping, which, however, requires tools. Furthermore, the installation of such panels is often cumbersome and time-consuming, and a wide range of products is necessary to meet diverse installation-specific requirements. Therefore, a simplified mounting system for such panels is desirable. At least one object of certain embodiments is to provide a plug connector for connecting two panel elements for a scaffolding system. Further objects of certain embodiments are to provide a composite panel comprising at least two panel elements and a scaffolding system comprising a composite panel. These objects are solved by the subject-matters according to the independent patent claims. Advantageous embodiments and further developments of the subject-matters are described in the dependent claims and become further apparent from the following description and the drawings. According to at least one embodiment, a plug connector for connecting two panel elements for a scaffolding system is specified. According to at least one further embodiment, a composite panel comprising at least two panel elements and at least one plug connector is specified. In particular, the plug connector may be intended and configured to mechanically and fixedly connect two panel elements to one another. According to at least one further embodiment, a scaffolding system comprising at least one composite panel is specified. The following description refers equally to the plug connector, the composite panel comprising the plug connector and the scaffolding system comprising the composite panel. In a preferred embodiment, a plug connector for connecting panel elements for a scaffolding system has the following features: - a base plate with a fixation region and a first insertion region, wherein an arrangement direction from the fixation region to the first insertion region defines a first insertion direction of the plug connector for insertion into a frame element of one of the panel elements, - a first fastening opening for a first retaining element, - at least one first stop element in the fixation region on a first main surface of the base plate, wherein the first insertion region and a first portion of the fixing area, together with a portion of the first stop element, form a first connection region for one of the panel elements. Furthermore, the plug connector may alternatively or additionally comprise features as described below. The scaffolding system may, for example, comprise a formwork system. Formwork systems for erecting structures are used to produce building components, such as walls or ceilings, and are generally configured to create a filling space for a hardenable building material, such as concrete. The construction material can be poured into the filling space and, after it has hardened, form the desired building component. Alternatively or additionally, the scaffolding system may comprise or be a climbing system. Climbing systems are devices configured to climb up building walls, for example, to perform renovation or cleaning work, or, in particular, in building construction, to erect the building walls along which the climbing system ascends. For example, in building construction, wall sections are erected in stages, along which—after they have hardened—the climbing system can ascend to continue erecting the building. In particular, the scaffolding system may preferably comprise or be a formwork system and a climbing system. The at least one composite panel with the at least two panel elements can, for example, be mounted on a side that is external to the building as viewed from the building, to serve as a safety system, in particular as fall protection, for persons on the scaffolding system. Furthermore, the at least one composite panel can also serve as a privacy screen and / or as weather protection, for example as sun and / or wind protection. In addition, the at least one composite panel can, for example, also serve as an advertising space on the scaffolding system. Each of the panel elements of the composite panel may comprise a profile frame. The profile frame may, particularly preferably, have a rectangular shape. A covering plate, such as a metal plate, a plastic plate or a perforated sheet, may be fastened to the profile frame. Furthermore, an insert element may be attached to the profile frame, which can be used to achieve desired visual and / or protective effects. The profile frame may be formed from several frame elements, most preferably from two horizontal frame elements and two vertical frame elements, which are connected to one another to form a rectangular shape. Unless otherwise specified, terms such as “horizontal” and “vertical” may refer, here and in the following, with particular preference, to an orientation during the installation of the panel elements in the composite panel and in the scaffolding system in accordance with their intended use. Each of the frame elements may be a profile element selected from a hollow profile such as a square profile, a U-profile, a Z-profile, an L-profile, an I-profile or a combination of several of the same or different types of profiles mentioned. In particular, the frame elements may be provided with mounting holes intended and configured to accommodate retaining elements. Here and hereinafter, a retaining element may, in particular, be selected from bolts, screws, rivets and pins. In particular, the scaffolding system may comprise at least one support that is attached, for example, to a building or a part of a building. For example, the support may be a vertical support. The at least one composite panel may be attached to the support directly or indirectly, for example via one or more braces. These may, for example, be screwed or bolted braces that can be attached directly to a profile frame of a panel element and to a support of the scaffolding system. By means of at least one plug connector, two panel elements that are directly adjacent to one another within a composite panel can be mechanically connected to one another and thus fixed together. It is particularly preferred that two panel elements be connected to one another using two similarly embodied plug connectors. The plug connector described here may, in particular, comprise a first connection region for mechanically connecting the plug connector to a first of the two panel elements and a second connection region for mechanically connecting the plug connector to a second of the two panel elements. A mechanical connection may, in particular, refer to a form-fit connection, a force-fit connection or a combination of form-fit and force-fit connections. It is particularly preferred that the connection can be released by removing the plug connector(s), so that the composite panel can be disassembled back into individual panel elements. The plug connector may, in particular, comprise a metal, preferably steel, or be made thereof. It is particularly preferred that all parts and regions of the plug connector described below comprise a metal and, in particular, be manufactured with or from steel and / or aluminum. A combination of different parts made of different materials is also possible. According to a further embodiment, the plug connector comprises a base plate. The base plate may, in particular, comprise a first main surface and a second main surface opposite the first main surface, which are connected to one another by one or more side surfaces. In particular, the base plate may be flat, such that the first and second main surfaces are parallel to one another, and have a height that is less than a length and a width. The height may, in particular, be defined as the distance between the first and second main surfaces, while the length and width are two mutually perpendicular dimensions, both of which are in turn perpendicular to the height. Thus, the length and width may be parallel to the first and second main surfaces. The length may preferably be the greatest dimension of the base plate along the first and second main surfaces. The lengths, widths, and heights of other parts of the plug connector may be dimensions in corresponding directions. According to a further embodiment, the first and / or the second main surfaces of the base plate may be curved. A combination of a curved and a flat main surface is also possible. Furthermore, the base plate may comprise multiple plate elements stacked one on top of the other. Thus, the base plate may comprise multiple plate elements that are arranged one above the other in the height direction, i.e., in particular in a direction perpendicular to the first main surface, such that the plate elements may be spaced apart from one another along the height direction. The multiple plate elements may, for example, be connected to one another via one or more plate connecting elements. In the case of multiple plate elements that may form the base plate, the plug connector has an uppermost and a lowermost plate element along the height direction. In this case, the first main surface may be the main surface of the uppermost plate element that faces away from the lowermost plate element in the height direction. Accordingly, the second main surface may be the main surface of the lowermost plate element that faces away from the uppermost plate element in the height direction. According to a further embodiment, the base plate comprises a fixation region. In particular, a first stop element may be formed in the fixation region, which is intended and configured to be pressed, in a state mounted on at least one panel element, with at least one surface against a portion of a frame element of the at least one panel element. The first stop element may, particularly preferably, be formed on the first main surface of the base plate. According to a further embodiment, the base plate comprises a first insertion region. At least the first insertion region, or the first insertion region and a portion of the fixation region, may be intended and configured to be inserted into a frame element of a panel element and further fixed therein. The first insertion region may, in particular, be the region with which the plug connector is inserted into the frame element and then pushed further until, preferably, a portion of the fixation region is also inserted. The arrangement direction from the fixation region to the first insertion region defines a first insertion direction of the plug connector for insertion into a frame element of a panel element. In particular, the length described above may be dimensioned, particularly preferably, along the first insertion direction, while the width and height may each be perpendicular to the first insertion direction. In particular, the first insertion region and a first portion of the fixation region may form, together with a portion of the first stop element, a first connection region for a panel element into whose frame element the first insertion region is inserted. According to a further embodiment, the base plate has a first fastening opening for a retaining element. Most preferably, the first fastening opening may be formed in the first insertion region. In particular, after the first insertion region or the first insertion region and a portion of the fixation region has / have been inserted into the frame element of a profile frame of a panel element, the first fastening opening may overlap with at least one mounting hole in the frame element, such that a retaining element can be inserted through the at least one mounting hole and the first fastening opening. This allows the plug connector to be mechanically fixed to a panel element. Particularly preferred is a configuration in which the region of the frame element into which the plug connector is inserted with the first insertion region or the first insertion region and a portion of the fixation region preferably comprises two plate-shaped regions provided with mounting holes, between which at least a portion of the first connection region is positioned during insertion. The retaining element can preferably be inserted first through one of the mounting holes of one of the two plate-shaped regions, then through the first fastening opening of the plug connector, and then through one of the mounting holes of the other of the two plate-shaped regions of the frame element. According to a further embodiment, the first insertion region tapers away from the fixation region. The first insertion region thus preferably has a width that decreases in a direction along the insertion path away from the fixation region, wherein, as described above, the width is preferably measured in a direction perpendicular to the insertion direction and perpendicular to a normal to the first main surface. The first insertion region may thus be conically shaped with respect to its width and preferably has two insertion bevels formed by side surfaces of the base plate. Most preferably, the first insertion region may be symmetrical with respect to a plane of symmetry perpendicular to the width direction. Furthermore, the first connecting region or the base plate itself may be shaped symmetrically in the same manner. The first stop element may protrude from the base plate, in particular from the first main surface of the base plate. Most preferably, the first stop element does not protrude beyond the base plate in the width direction, but rather extends away from the first main surface with a principal direction of extension in the height direction. The stop element may thus have a width that is less than the width of the base plate. The first stop element may be formed integrally with the base plate. Furthermore, the first stop element may be attached to the base plate, for example by welding, clamping or screwing. According to a further embodiment, the first stop element has a cylindrical shape, a truncated pyramid shape or a truncated cone shape. In particular, when viewed from the direction of the first main surface, the first stop element may have a cross-section that is round, polygonal or a combination thereof. In particular, the cross-section may refer to a base surface of the first stop element, wherein the base surface may be defined as that surface of the first stop element that is adjacent to the first main surface. If the base plate and the first stop element are formed as a single piece, the base surface may be an imaginary surface lying in the plane defined by the first main surface. Opposite the base surface, the first stop element has a top surface that faces away from the first main surface and with which the first stop element terminates in a direction away from the first main surface. It is particularly preferred that the base surface and the top surface have the same shape. The distance between the base surface and, thus, the first main surface and the top surface defines the height of the first stop element. It is particularly preferred that the first stop element has a base surface in the shape of a hexagon, a rectangle or a rhombus. The top surface is preferably formed with the same shape as the base surface. Furthermore, other shapes are also possible for the base surface and the top surface, such as an octagon, an ellipse, a circle, a triangle as well as combinations of the aforementioned shapes. The base surface and the top surface are connected to one another by a circumferential curved side surface or by multiple side surfaces connected by edges, which may also be referred to as lateral surfaces. Parts of the one or more side surfaces of the first retaining element are intended and configured to be pressed against a recess in the profile frame, specifically in a frame element, of a panel element when the plug connector is fixed to the frame element as described above using the retaining element inserted through the first fastening opening. In a particularly preferred embodiment, the first stop element is intended and configured to engage positively with a portion of the side surface(s) into a recess in a wall of a frame element of a panel element. This portion of the side surface(s) thus forms part of the first connection region. According to a further embodiment, a second stop element is formed on the second main surface of the base plate—opposite the first main surface—within the fixation region, wherein the first connection region comprises a first portion of the second stop element. All features and characteristics of the first stop element may preferably also apply to the second stop element. It is particularly preferred that the first and second stop elements be designed identically. In particular, this may mean that the first and second stop elements have a substantially identical outer contour. Alternatively, the first and second stop elements may be designed differently. According to a further embodiment, a first positioning element in the form of an elevation is formed on the base plate on the first main surface between the first stop element and the first fastening opening. The first positioning element may, in particular, be an elevation, such as a fin, that extends across a portion of the first main surface. The first positioning element may be fastened to the first main surface, for example by welding or clamping, or, preferably, may be formed integrally with the base plate. The first positioning element may have a main extension direction in the longitudinal direction, i.e., along the first insertion direction, or in the transverse direction, i.e., perpendicular to the first insertion direction, and may, for example, also extend across the entire width of the base plate. It is particularly preferred that the first positioning element has a main extension direction along the first insertion direction and thus extends longitudinally along the first insertion direction. Furthermore, the first positioning element may have an insertion bevel facing away from the first stop element. Thus, the insertion bevel may be formed along the first insertion direction at the front of the first positioning element, which is preferably configured as a fin. The first positioning element may preferably be arranged partly in the fixation region and partly in the first insertion region. According to a further embodiment, a second positioning element in the form of an elevation is formed on the second main surface of the base plate, which is opposite the first main surface. All features and characteristics of the first positioning element may preferably also apply to the second positioning element. It is particularly preferred that the first and second positioning elements be identically configured. In particular, this may mean that the first and second positioning elements have a substantially identical outer contour. Alternatively, the first and second positioning elements may be configured differently. The base plate, the first positioning element and the second positioning element may together have a height that is adapted to the profile of the frame element of the panel element into which the first connection region is inserted. In particular, this may mean that the first and second positioning elements each have a surface facing away from the base plate, which, when inserted, can lie flush against the frame element or, preferably for example to facilitate insertion, may have a slight amount of play. The fixation region may have a width adapted to the profile of the frame element of the panel element into which the first connecting region is inserted. The fixation region may thus, when inserted, bear tightly against the frame element with regions of the circumferential side surface that connect the first and second main surfaces, or, preferably for example to facilitate insertion, may have some clearance. While the fixation region may thus be intended and configured to provide lateral guidance for the plug connector within the frame element, the positioning elements may be intended and configured to provide vertical guidance. According to a further embodiment, the fixation region and the first insertion region are formed symmetrically with respect to a plane of symmetry parallel to the first main surface. In other words, with respect to the height direction, an upper side and a lower side of the plug connector may be formed identically at least in the fixation region and in the first insertion region. Particularly preferred is a configuration in which the entire plug connector is formed symmetrically with respect to the plane of symmetry parallel to the first main surface. This may facilitate the mounting of the plug connector. According to a further embodiment, the plug connector comprises a second connection region for a further panel element, which comprises a second insertion region and a second portion of the fixation region with a second portion of the first stop element, wherein the fixation region is arranged between the first and second insertion regions. The second connection region may include a second fastening opening for an additional retaining element. Furthermore, an arrangement direction from the fixation region to the second insertion region may define a second insertion direction of the plug connector for insertion into a frame element of the further panel element. Accordingly, both connection regions of the plug connector may each be configured for insertion into a frame element of a respective panel element. The first and second insertion directions may preferably be antiparallel, so that the two panel elements can be slid onto the plug connector in direct alignment with one another and fixed to each other by the plug connector. The second connection region may have features and characteristics described in connection with the first connection region. The first connection region and the second connection region may preferably be embodied identically. In particular, this may mean that the first connection region and the second connection region may preferably be embodied to be substantially symmetrical with respect to the fixation region. In particular, the second insertion region may be configured identically to the first insertion region. Furthermore, the first part of the fixation region of the first connection region may be configured identically to the second part of the fixation region of the second connection region. It is particularly preferred that the plug connector be configured symmetrically with respect to a plane of symmetry perpendicular to the first and second insertion directions. According to a further embodiment, the plug connector comprises a second connection region for a further panel element, wherein the second connection region comprises a first plate element and a second plate element that are spaced apart from one another in a direction perpendicular to the first main surface and that are intended and configured to partially encompass a portion of a profile frame of the further panel element. In particular, a portion of a frame element, specifically a horizontal frame element, of the further panel element, to which the plug connector with the second connection region is attached, can be encompassed. While in this embodiment the first connection region is configured for insertion into a frame element of a profile frame of a first panel element, the second connection region is intended and configured for mounting externally on the frame element of a profile frame of a second panel element. According to a further embodiment, the first and second panel elements each have at least two second fastening openings, each for a retaining element, such that each retaining element can be inserted through a second fastening opening of the first panel element and a second fastening opening of the second panel element. The second fastening openings thus overlap in pairs, as seen in a top view along the height direction. Between the second fastening openings through which a common retaining element is inserted, at least one mounting hole of the frame element of the further panel element is arranged when the plug connector is assembled, through which the retaining element is also inserted. The arrangement direction of the at least two second fastening openings of the first plate element and the at least two second fastening openings of the second plate element may form an angle greater than or equal to 0° and less than or equal to 180° with the first insertion direction. This allows for the definition of an angle at which the two interconnected panel elements are positioned relative to one another. The arrangement direction and the first insertion direction are preferably perpendicular or parallel to each other. For example, the first panel element may be fixed to the first stop element and the second panel element to the second stop element. Alternatively, it may also be possible for the first panel element and the second panel element to be part of a U-profile that is fixed to the base plate. “Fixed” in this context may, in particular, mean permanently fixed, for example, formed as a single piece, clamped or welded. According to a further embodiment, the base plate is T-shaped and comprises a second connection region for an additional panel element. In particular, in this embodiment, the second connection region may be formed by a portion of the base plate. In particular, the second connection region may be intended and configured to be mounted on the additional panel element via a receiving element intended and configured for this purpose, for example mounting tabs with mounting holes between which the base plate can be positioned. The second connection region may include at least a second fastening opening for a further retaining element. The further retaining element may be rotatably mounted in the mounting hole. In particular, the second connection region may be intended and configured to be partially positioned between mounting tabs of the further panel element and to be rotatably fixed by means of the further retaining element. Furthermore, the second connection region may also include a second fastening opening for yet a further retaining element, with which the second connection region can be fixed to the further panel element in such a way that the plug connector is no longer rotatable. The two second fastening openings may preferably have an arrangement direction that is perpendicular to the first insertion direction. This may mean that the at least one fastening opening of the first connection region and the two second fastening openings of the second connection region lie at the corners of an imaginary triangle. Furthermore, instead of one of the second fastening openings, a retaining element may be present in the second connection region, which can be connected to a further retaining element on the other panel element. It is also possible that no second fastening opening is present. In this case, the further panel element can be held in place at a different location relative to the first panel element. To form a composite panel, the plug connector is inserted, as described above, with the first connection region, i.e., with the first insertion region and preferably a portion of the fixing area, into a frame element of a profile frame of a first of at least two panel elements of the composite panel to be formed. Furthermore, the plug connector is fastened to the first of the at least two panel elements by means of at least a first retaining element and to a second of the at least two panel elements by means of at least a second retaining element. Accordingly, the first connection region on the first panel element and the second connection region on the second panel element are each fixed and fastened with at least one retaining element. It is particularly preferred that the two panel elements be connected to one another by two plug connectors. Preferably, two panel elements may also be connected using three or more plug connectors. The plug connectors may be embodied identically. As described above, the retaining elements used in conjunction with the plug connectors are preferably pinshaped, such as bolts or screws. It is particularly preferred that each of the retaining elements has at least one tapered end region, which facilitates insertion into a mounting hole and a fastening opening. Furthermore, a spring retainer or a nut may be provided to secure each of the retaining elements. The composite panel may comprise more than two panel elements, wherein any two directly adjacent panel elements of the composite panel are connected by at least one plug connector. Different plug connectors may be used here in accordance with the embodiments described above. The plug connector described here, in accordance with the described embodiments, can allow for a wide range of applications for straight, angled, adjustable, split and / or foldable panel element arrangements. For example, in an embodiment as a corner plug connector, it is possible to arrange panel elements at an angle of 90° or at any other angle relative to one another. Regardless of the specific embodiment, the plug connector described here preferably allows for a completely play-free panel element connection and force transmission. This has the advantage of preventing movement and rattling noises in the composite panel. Furthermore, simple assembly is possible using only two or three retaining elements, such as bolts, instead of the four or more connection elements required by prior-art solutions. A coplanar arrangement of panel elements is possible, which can be advantageous, for example, for advertising purposes. Additionally, no additional diagonal bracing is required for stiffening, as the panel elements are connected to one another via a form-fit connection. The plug connector described here, regardless of its specific configuration in accordance with the described embodiments, can enable a force-fit, form-fit, play-free, centering locking and connection of panel elements to form a composite panel, which can be used in a scaffolding system, for example, as so-called perimeter protection, a protection screen, enclosure and / or protective wall, such as a climbing protection wall. As described, the plug connector can, particularly preferably, be inserted with at least one side into a profile frame of a panel element and comprise a one- or multi-part base plate on which at least one stop element is arranged substantially perpendicular to the main surfaces, the stop element abutting against and engaging with an end region of a frame element in a centering, form-fitting manner, and which has at least one fastening opening for inserting a retaining element through the frame element and the plug connector, so that, in conjunction with the stop element, bending moments can be transmitted from the plug connector to the profile frame. Further advantages, advantageous embodiments, and further developments are apparent from the exemplary embodiments described below in conjunction with the figures. Figure 1 shows a schematic illustration of a composite panel according to an embodiment, Figures 2A to 2D show schematic illustrations of a panel element according to a further embodiment, Figures 3A to 4B show schematic illustrations of a panel element according to further embodiments, Figure 5 to a schematic illustration of a scaffolding system according to a further embodiment, Figures 6A to 6C show schematic illustrations of a part of a plug connector according to a further embodiment, Figures 7A to 9C show schematic illustrations of a part of a plug connector according to further embodiments, Figures 10A and 10B show schematic illustrations of a plug connector according to a further embodiment, Figures 11 to 13 show schematic illustrations of a plug connector according to further embodiments, Figures 14A and 14B show schematic illustrations of a composite panel according to a further embodiment, Figures 15A to 15D show schematic illustrations of a plug connector and a composite panel according to further embodiments, Figures 16A to 16C show schematic illustrations of a plug connector and a composite panel according to further embodiments, Figures 17A to 18L show schematic illustrations of a plug connector, a composite panel, and a scaffolding system according to further embodiments. In the embodiments and figures, identical, similar, or functionally equivalent elements may be designated by the same reference signs. The elements shown and their relative dimensions are not to be considered to scale; rather, individual elements, such as layers, components, structural elements and regions, may be depicted as exaggeratedly large for better visualization and / or understanding. Figure 1 shows a schematic illustration of a composite panel 200 according to an embodiment. The composite panel 200 may, in particular, be part of a scaffolding system, which is explained in connection with several embodiments below. In particular, the composite panel 200 comprises at least two panel elements 100 that can be connected to one another by means of at least one plug connector 30. In Figure 1, for clarity, the panel elements 100 and the plug connector 30 are shown in a state in which they are not yet mechanically connected to one another, with the functional connection between the panel elements 100 and the plug connector 30 indicated by the double arrows. Each of the panel elements 100 comprises a profile frame 1, as described in detail below. The profile frame 1 of each of the panel elements 100 may preferably have a rectangular shape and be formed from several frame elements, most preferably from two horizontal frame elements 10 and two vertical frame elements 20, which are connected to one another to form the rectangular shape. Terms such as “horizontal” and “vertical” refer here and in the following, unless otherwise specified, to the intended installation of the panel elements 100 in the composite panel 200 and in the scaffolding system. Accordingly, in some figures the horizontal direction 91 and the vertical direction 92 are indicated to suggest the intended orientation of the panel elements. In addition, in some figures, such as Figures 2A to 5 as well as in other figures, a depth direction 93 may be indicated, which is perpendicular to the horizontal direction 91 and perpendicular to the vertical direction 92. In particular, the plug connector 30 comprises a first connection region 31 for mechanically connecting the plug connector 30 to a first of the two panel elements 100 and a second connection region 32 for mechanically connecting the plug connector 30 to a second of the two panel elements 10. A mechanical connection may, in particular, refer to a form-fit and force-fit connection. Figures 2A to 2D show schematic illustrations of different views of a panel element 100 according to an embodiment. Figure 2A shows a three-dimensional view of the panel element 100. Figures 2B, 2C and 2D show detailed views of parts of the panel element 100. The following description refers equally to Figures 2A to 2D. As described above, the panel element 100 comprises a profile frame 1 formed by two horizontal frame elements 10 and two vertical frame elements 20. Each of the horizontal frame elements 10 has a main extension direction that runs along the horizontal direction 91. Each of the vertical frame elements 20 has a main extension direction that runs along the vertical direction 92. Perpendicular to the horizontal and vertical directions 91, 92, a depth direction 93 is defined, as described above. The vertical frame elements 20 are arranged along the vertical direction 92 between the horizontal frame elements 10 and have vertical end regions 25 that are connected to the horizontal frame elements 10. For example, the frame elements may be permanently joined to one another by welding, riveting or screwing or a combination thereof. A plate 2, which may, for example, formed by a perforated sheet, may be mounted on the profile frame 1, for instance by screwing or riveting. Each of the frame elements, i.e., the horizontal frame elements 10 and the vertical frame elements 20, is preferably a profile element that may be selected from a hollow profile such as a square profile, a U-profile, a Z-profile, an L-profile, an I-profile or a combination of several similar or different types of profiles mentioned. In the illustrated embodiment, the horizontal frame elements 10, as shown in part in Figures 2C and 2D, are configured as hollow profiles, specifically as square profiles 11. The vertical frame elements 20, as shown in part in Figure 2B, are formed as Z-profiles 21, each of which has a central part 22 to which, on sides opposite one another along the depth direction 93, a first leg part 23 and a second leg part 24 abut at an angle, extending in opposite directions along the horizontal direction 91. The frame elements, i.e., the horizontal frame elements 10 and the vertical frame elements 20, are provided with mounting holes 18, only some of which are labeled for clarity and which are intended and configured to accommodate retaining elements. Here and in the following, a retaining element may, in particular, be selected from a bolt, a screw, a rivet or a pin. By way of example only, in the embodiments described below, the retaining elements are embodied as bolts. The vertical frame elements 20 additionally comprises fastening openings 29 into which cross struts 4 can engage to fasten an insert element 3 in the profile frame 1 on the plate 2, as shown in conjunction with Figures 4A and 4B. As can be seen in Figures 2C and 2D, the horizontal frame elements 10 have horizontal end regions 15 in which recesses 19 are formed, which are intended and configured to allow parts of stop elements of plug connectors to engage, as described further below. As shown in Figures 3A and 3B, which correspond to the views in Figures 2C and 2D, according to a further embodiment the horizontal frame elements 10 may, for example, also comprise a combination of a square profile 11 and an L-profile 12. Furthermore, other combinations of profiles are also possible. Figures 4A and 4B show a panel element 100 in an exploded view and in its assembled state, comprising a profile frame 1 with a plate 2 mounted thereon, as described in connection with Figures 2A to 3B. An insert element 3, for example a corrugated panel comprising or made of plastic serving as a privacy screen and / or windbreak, is fastened to the profile frame 1 by means of cross struts 4. Furthermore, the panel element 100 comprises, by way of example only, a folding platform 5 that is fastened to the profile frame 1 and, in particular, to the vertical frame elements of the profile frame 1 by means of retaining elements such as bolts. The folding platform 5 can be fastened to the profile frame 1 in a folded-up position for the assembly of the panel element 100 into a composite panel and, subsequently, into a scaffolding system, and can be unfolded as needed after assembly. Figure 5 shows, in a schematic illustration, a detail of an embodiment of a scaffolding system 1000 comprising at least one composite panel 200 with panel elements 100 that are configured as described in connection with Figures 4A and 4B. By way of example only, a folding platform 5 is shown folded-up on one of the panel elements 100, while the folding platforms 5 on two other panel elements 100 are shown unfolded. The scaffolding system 1000 may, for example, comprise or be a formwork system and a climbing system as described in the general part. The composite panel 200 is mounted, for example, by bracing to supports, in particular vertical supports 900, of the scaffolding system 1000. These may, for example, be bracing elements secured by screws or bolts, which may, for instance, be attached directly to a profile frame 1 of one or more panel elements 100 of the composite panel 200. The vertical supports 900, in turn, may be attached to a building or part of a building that is equipped with the scaffolding system 1000. The at least one composite panel 200 may, for example, be installed on a side of the building that faces outward, for instance to serve as a safety system, in particular as fall protection, for persons on the scaffolding system 1000. Furthermore, the at least one composite panel 200 can also serve as a privacy screen and / or as weather protection, in particular as a windbreak, and / or as an advertising space. As described in connection with Figure 1, the panel elements 100 are mechanically connected to one another by means of plug connectors. Figures 6A to 6C show parts of a plug connector 30 according to an embodiment. Figure 6A shows a three-dimensional oblique view, while Figure 6B shows a sectional view and Figure 6C shows a top view. In particular, Figures 6A to 6C show the first connection region 31 of the plug connector 30 described in connection with Figure 1, which is intended and configured for insertion into a region of the profile frame of a panel element. In particular, the first connection region 31 is intended and configured for insertion into a horizontal frame element of a profile frame of a panel element. The plug connector 30 comprises a base plate 310. The base plate 310 comprises a first main surface 311 and a second main surface 312 opposite the first main surface 311, which are connected to one another by one or more side surfaces. It is particularly preferred that the base plate 310 be flat, as shown, so that the first and second main surfaces 311, 312 can be parallel to one another. The base plate 310 has a height that is less than its length and width. The height is defined as the distance between the first and second main surfaces 311 and 312. The length and width are two mutually perpendicular dimensions, both of which are in turn perpendicular to the height, such that the length and width lie parallel to the first and second main surfaces 311 and 312. The length may preferably be the greatest dimension of the base plate 310 along the first and second main surfaces 311, 312. The lengths, widths and heights of other parts of the plug connector 30 may be dimensions in corresponding directions. The base plate 310 has a fixation region 300. In the fixation region 300, a first stop element 330 is formed on the first main surface 311, the stop element being intended and configured to be pressed, in a state mounted on a panel element, with at least one surface against a portion of a frame element of the panel element’s profile frame, in particular into a recess 19 of a horizontal frame element 10 as described in connection with Figures 2A to 3B. Furthermore, the base plate 310 comprises a first insertion region 301. At least the first insertion region 301 or, preferably, the first insertion region 301 and a portion of the fixation region 300 are intended and configured to be inserted into a frame element of a panel element, such as a horizontal frame element, and to be fixed there. The first insertion region 301 is, in particular, the region of the plug connector 30 with which the plug connector 30 is inserted into the frame element and then pushed further until, preferably, a portion of the fixation region 300 is also inserted. The arrangement direction from the fixation region 300 to the first insertion region 301 defines a first insertion direction 303 of the plug connector 30 for insertion into a frame element of a panel element. In particular, the length described above is preferably dimensioned along the first insertion direction 303, while the width and height are each perpendicular to the first insertion direction 303. In particular, the first insertion region 301 and a first portion of the fixation region 300, together with a portion of the first stop element 330, form the first connection region 31 for a panel element, into whose frame element the first insertion region 301 is inserted. Furthermore, the base plate 310 has a first fastening opening 313 for a retaining element. As shown, the first fastening opening 313 may be formed in the first insertion region 301. In particular, after the first insertion region 301 or the first insertion region 301 and a portion of the fixation region 300 has / have been inserted into the frame element of a profile frame of a panel element, the first fastening opening 313 overlaps with at least one mounting hole in the frame element, so that a retaining element 102 can be inserted through the at least one mounting hole and the first fastening opening 313. This allows the plug connector 30 to be mechanically fastened to a panel element. Figure 6A shows, for better understanding, a retaining element 102 in the form of a bolt inserted into the first fastening opening 313. Furthermore, a spring retainer 103 for securing the retaining element 102 is shown. Naturally, the retaining element 102 and the spring retainer 103 are inserted into the fastening opening 313 only after the first connection region 31 has been inserted into a frame element of a panel element. Particularly preferably, the region of the frame element into which the plug connector 30 is inserted with the first insertion region or the first insertion region and a portion of the fixation region preferably comprises two plate-shaped regions provided with mounting holes, between which at least a portion of the first connecting region 31 is positioned during insertion. The two plate-shaped regions may, for example, be parts of a square profile, as described in connection with Figures 2A to 3B. In the illustrated embodiment, the first insertion region 301 tapers away from the fixation region 300. The first insertion region 301 thus preferably has a width that decreases in a direction along the insertion direction 303 away from the fixation region 300. The first insertion region 301 is thus conical in width and has two insertion bevels 315 formed by the side surfaces of the base plate 310, as can be seen in Figures 6A and 6C. Preferably, the first insertion region 301 is symmetrical with respect to a plane of symmetry perpendicular to the width direction. It is particularly preferred that the first connecting region 31 or even the entire base plate 310 be embodied symmetrically in this manner. The first stop element 330 protrudes from the base plate 310, specifically from the first main surface 311 of the base plate 310. It is particularly preferred that the first stop element 310 does not extend laterally, i.e., in a direction perpendicular to the first insertion direction 303 along the plane of the first main surface 311, beyond the base plate 310, but rather extends with a main extension direction perpendicular to the first main surface 311. In other words, the first stop element 330 is preferably no wider than the base plate 310. The first stop element 330 is preferably formed integrally with the base plate 310. Alternatively, the first stop element 330 may also be fastened to the base plate 310, for example by welding or clamping. In the illustrated embodiment, the first stop element 330 has a cylindrical shape with a hexagonal cross-section. In particular, the cross-section may refer to a base surface 331 of the first stop element 330, wherein, in the illustrated embodiment, the base surface 331 refers to the imaginary surface that adjoins the first main surface 311 and is indicated by a dashed line in Figure 6B. Opposite this imaginary base surface 331, the first stop element 330 has a top surface 332 which faces away from the first main surface 311 and with which the first stop element 330 terminates in a direction away from the first main surface 311. Particularly preferably, the base surface 331 and the top surface 332 have the same shape, as in the illustrated embodiment. The distance between the base surface 331 and, thus, the first main surface 311 and the top surface 332 defines the height of the first stop element 330. In the illustrated embodiment, the base surface 311 and the top surface 332 are connected to one another by several side surfaces 333 joined by edges, which may also be referred to as lateral surfaces. Parts of the side surfaces 333 of the first stop element 330 are intended and configured to be pressed against a recess 19 in the profile frame 1, as shown in Figures 2C to 3B, in particular in a frame element of a panel element, when the plug connector 30 is fixed to the frame element, as described above, with the retaining element 102 inserted into the first fastening opening 313. It is particularly preferred that the first stop element 330 is intended and configured to engage positively with a portion of the side surfaces 333 into a recess in a wall of a frame element of a panel element, which is correspondingly formed as part of a negative form of the cross-section of the first stop element 330. This portion of the side surfaces 333 thus forms part of the first connection region 31. Further developments and modifications of the plug connector 30 are described in conjunction with the figures described below. Features and parts of the plug connector 30 that are not explicitly described below may be configured as described in previous embodiments. As indicated in connection with Figures 7A to 7E, in accordance with further embodiments, in views corresponding to the view of Figure 6C, the first stop element 330 may also have a different cross-sectional shape and thus a different shape of the base surface 331 and the top surface 332 than a hexagonal shape. For example, the cross-sectional shape may be triangular (Figure 7A), square (Figure 7B), rectangular, diamond-shaped (Figure 7C), or octagonal (Figure 7D). Furthermore, other polygonal shapes, in particular irregular polygonal shapes, are also possible. Furthermore, the crosssectional shape may also be round, for example circular or elliptical (Figure 7E). In this case, the first stop element 310 has a curved, fully circumferential side surface 333. In addition, combinations of the shown shapes or other polygonal and round shapes are also possible. As an alternative to a cylindrical shape, the first stop element 330 may also have a truncated pyramid or truncated cone shape, depending on whether the cross-section is polygonal or circular, as indicated in the corresponding views in Figures 8A and 8B, which correspond to Figure 6B. In this case, the first stop element 330 may taper (Figure 8A) or widen (Figure 8B) in terms of cross-sectional area from the first main surface 311 toward the top surface 332. In addition to the first stop element 330 on the first main surface 311, as indicated in Figures 9A and 9B, a second stop element 340 may be formed on the second main surface 312 of the base plate 310, opposite the first main surface 311, within the fixation region 300, wherein the first connecting region 31 also comprises a first portion of the second stop element 340. All features and characteristics of the first stop element 330 may preferably also apply to the second stop element 340. As shown in Figure 9A, the first and second stop elements 330, 340 may be identically configured. Alternatively, as indicated in Figure 9B, the first and second stop elements 330, 340 may be configured differently. Furthermore, as indicated in Figure 9C, the base plate 310 may comprise multiple plate elements 3101 that are arranged one above the other in the height direction, i.e., in a direction perpendicular to the first main surface 311. The plate elements may, for example, be connected to one another via one or more plate connecting elements 3102, as indicated in Figure 9C. Alternatively, the plate elements 3101 may also be arranged one above the other without a fixed connection. Figures 10A and 10B show, in views corresponding to those in Figures 6A and 6B, a further embodiment of the plug connector 30, which comprises a second connection region 32 for a further panel element. The second connection region 32 comprises a second insertion region 302 and a second portion of the securing area 300, wherein the securing area 300 is arranged between the first and second insertion regions 301, 302. The second connection region 32 comprises, in the second insertion region 302, a second fastening opening 314 for a retaining element 102, which is shown in Figure 10A together with a spring retainer 103. The arrangement direction from the fixation region 300 to the second insertion region 302 defines a second insertion direction 304 of the plug connector 30 for insertion into a frame element of the further panel element. Accordingly, in this embodiment, both connection regions 31, 32 of the plug connector 30 are each configured for insertion into a frame element of a respective panel element. The first and second insertion directions 303, 304 are preferably antiparallel to one another, as indicated in Figures 10A and 10B, so that the two aforementioned panel elements can be slid onto the plug connector 30 in direct alignment with one another and fixed to one another by the plug connector, as described further below in connection with Figures 14A and 14B. The second connection region 32 may, in particular, exhibit features and characteristics described in connection with the first connection region 31. The first connection region 31 and the second connection region 32 are, particularly preferably, embodied identically. In particular, the second insertion region 302 may be configured identically to the first insertion region 301. Furthermore, the first part of the fixation region 300 of the first connection region 31 is preferably configured identically to the second part of the fixation region 300 of the second connection region 32. It is particularly preferred that the plug connector 30 be configured symmetrically with respect to a plane of symmetry perpendicular to the first and second insertion directions 303, 304. As shown in Figure 11 based on a further embodiment, a second stop element 340 may additionally be formed on the second main surface 312 of the base plate 310, as described in connection with Figures 9A and 9B. Thus, the plug connector 30 may, in a particularly preferred embodiment, be symmetrical with respect to three planes of symmetry that are perpendicular to the length, width and height directions. By way of example only, the stop elements are shown in the following embodiments as cylindrical with a hexagonal crosssection. However, they may also have other shapes as described above. Figures 12A and 12B show, in views corresponding to those in Figures 10A and 10B, a further embodiment of the plug connector 30, which corresponds to the embodiment shown in Figure 11 and which further comprises a first positioning element 351 on the first main surface 311 in the first connection region 31 and a further first positioning element 352 on the first main surface 311 in the second connection region 32. The first positioning element 351 is formed on the first main surface 311 between the first stop element 330 and the first fastening opening 313 in the form of an elevation on the base plate 310. The first positioning element 351 may, in particular, be an elevation, such as a fin, that extends over a portion of the first main surface 311. The first positioning element 351 may have a main extension direction in the longitudinal direction, i.e., along the first insertion direction 303, or, alternatively, in the transverse direction, i.e., perpendicular to the first insertion direction 303, and may, for example, also extend across the entire width of the base plate 310. Most preferably, as shown in Figures 12A and 12B, the first positioning element has a main extension direction along the first insertion direction 303 and thus extends longitudinally along the first insertion direction 303. Furthermore, the first positioning element 351 has, for example, an insertion bevel facing away from the first stop element 330, which is thus formed along the first insertion direction 303 at the front of the first positioning element 351, which is preferably embodied as a fin. The first positioning element 351 is preferably arranged partly in the fixation region 300 and partly in the first insertion region 301. The additional first positioning element 352 in the second connection region 32 is preferably embodied similarly to the first positioning element 351 in the first connection region 31 and is preferably embodied and arranged to be mirror-symmetrical to the latter with respect to a plane of symmetry perpendicular to the insertion directions 303, 304. According to a further embodiment shown in Figure 13, a second positioning element 353 in the form of an elevation is formed on the second main surface 312 of the base plate 310 opposite the first main surface 311 within the first connection region 31. Furthermore, it is also preferred that a further second positioning element 354, in the form of an elevation, be formed on the base plate 310 in the second connection region 32 on the second main surface 312. All features and characteristics of the first positioning elements 351, 352 may preferably also apply to the second positioning elements 353, 354. It is particularly preferred that the first and second positioning elements 351, 352, 353, 354 be identically configured. Alternatively, the first and second positioning elements 351, 352, 353, 354 may also be configured differently. The base plate 310, the first positioning elements 351, 352, and the second positioning elements 353, 354 may collectively have a height that is adapted to the profile of the frame elements of the panel elements into which the first connection region 31 and the second connection region 32 are respectively inserted, as described in the general part. Furthermore, the fixation region 300 may have a width adapted to the profile of the frame elements of the panel elements into which the first connecting region 31 and the second connecting region 32 are inserted, as described in the general part. Figures 14A and 14B show, in a three-dimensional view and an associated detailed view, a composite panel 200 comprising two panel elements 100 that are connected to one another by two plug connectors 30. The plug connectors 30 may, for example, be configured as described in connection with Figure 13. Furthermore, configurations according to the other embodiments or combinations thereof are also possible. In particular, the composite panel 200 is shown in a state during assembly in which the plug connectors 30 have already been inserted into a first panel element 100 and fixed by retaining elements 102 and spring retainers 103. The second panel element 100 is shown at the moment just before it is slid onto the two plug connectors 30, i.e., just before the plug connectors 30 are inserted into the profile frame of the second panel element 100 as indicated by the sliding direction 94 in Figure 14A. The plug connector 30 described in the embodiments of Figures 10A to 13 enables a coplanar arrangement of the panel elements. Using conical retaining elements 102, such as conical pins, when inserted into the mounting holes 313, 314 of the plug connectors 30 and the mounting holes of the profile frames 1, a pulling movement of the panel elements 100 with the recesses 19 toward the stop elements 320, 340 can be achieved. The positioning elements, in turn, can prevent unwanted tilting of the plug connectors 30. Thus, the shape of the stop elements on the plug connectors 30, together with the correspondingly shaped recesses 19 in the profile frames 1 of the panel elements 100, enables a positive fit without play after assembly. The composite panel 200 can be extended accordingly using additional plug connectors 30, which are already shown mounted on the second panel element 100 in Figure 14A, and additional panel elements 100. Figures 15A through 15D show a plug connector 30 and a composite panel 200 according to further embodiments. The views of the plug connector 30 shown in Figures 15A and 15B correspond to the views in Figures 12A and 12B. In Figure 12B, the horizontal frame element 10 of a profile frame 1 of a panel element is indicated by a dashed line. Figures 12C and 12D show a three-dimensional sectional view and a threedimensional overall view of the composite panel 200. The following description refers equally to Figures 15A to 15D. The first connection region 31 is configured as described in connection with the previous embodiments and, by way of example only, does not have any positioning elements on the base plate 310. Compared to the embodiments shown in Figures 10A to 13, in the plug connector 30 shown in Figures 15A to 15D, the second connection region 32 is formed with a first plate element 321 and a second plate element 322, which are spaced apart from one another in a direction perpendicular to the first and second main surfaces 311, 312, and which are intended and configured to partially encompass a portion of a profile frame 1 of a panel element 100. In particular, as can be seen in Figures 15B, 15C and 15D, a portion of a horizontal frame element 10 of one of the panel elements, to which the second connection region 32 of the plug connector 30 is attached, is encompassed. Thus, while the first connection region 31 is embodied, as in the previous embodiments, to be inserted into a frame element of a profile frame 1 of a first panel element 100, the second connection region 32 is intended and configured for mounting on the outside of the frame element of a profile frame 1 of a second panel element 100. The first and second plate elements 321, 322 each have at least two second fastening openings 314, each for a retaining element 102, so that, as shown in Figure 15A, a single retaining element 102 can be inserted through a pair consisting of a second fastening opening 314 in the first plate element 321 and a second fastening opening 314 in the second plate element 322. The second fastening openings 314 thus overlap in pairs along the height direction when viewed from above. Between the paired second fastening openings 314 through which a common retaining element 102 is inserted, at least one mounting hole 18 of the frame element of the profile frame 1 is arranged in the assembled state of the plug connector 30, through which the retaining element 102 is also inserted. For example, the first plate element 321 may be fixed to the first stop element 330 and the second plate element 322 to the second stop element 340, for example by being integrally molded or welded. The arrangement direction of the at least two second fastening openings 314 of the first panel element 321 and the at least two second fastening openings 314 of the second panel element 322 may form an angle greater than or equal to 0° and less than or equal to 180° with the first insertion direction 303. This allows for the definition of an angle at which the two interconnected panel elements 100 are positioned relative to one another. The arrangement direction and the first insertion direction 303 may, for example, be perpendicular to one another, such that, as shown in Figures 15C and 15D, a perpendicular arrangement of the panel elements 100 relative to one another is possible. Accordingly, the plug connector 30 shown in Figures 15A to 15D allows for a wind-sail-like connection of a further panel element 100 that can be displaced along the length of a panel element 100, as indicated by the displacement direction 95 in Figure 15D. Figures 16A to 16C show further embodiments of a plug connector 30 in a three-dimensional view and of a composite panel 200 in a three-dimensional cross-sectional view and a three-dimensional overall view. The following description refers equally to Figures 16A to 16C. Compared to the embodiment of the plug connector 30 shown in Figures 15A to 15D, the first and second plate elements 321, 322 of the second connection region 32 are part of a U-profile that is fixed to the base plate 310 via the first connection region 31, i.e., welded to it or formed as a single piece. Furthermore, the arrangement direction of the at least two second fastening openings 314 of the first plate element 321 and the at least two second fastening openings 314 of the second plate element 322 is parallel to the first insertion direction 303 of the first connection region 31. As a result, in this embodiment, the plug connector 30 forms an adjustment adapter to allow for length compensation within the hole pattern of the mounting holes 18 with panel elements 100 passing past one another, as indicated by the displacement direction 95 in Figure 16C. The panel element 100 connected to the first connection region 31 of the plug connector 30 may, for example, be a fixed panel element 100, while the panel element 100 connected to the second connection region 32 can be adjusted in its position relative to it. Figures 17A and 17B show embodiments of a plug connector 30 and a scaffolding system 1000 with a composite panel 200, according to further embodiments, as viewed from the first main surface 311 of the plug connector 30. In these embodiments, the base plate 310 is T-shaped and comprises a second connection region 32 for an additional panel element, with two second fastening openings 314, each for a retaining element 102. In particular, in this embodiment, the second connection region 32 is formed by a portion of the base plate 310. As shown, the two second fastening openings 314 preferably have an arrangement direction that is perpendicular to the first insertion direction 303. This can mean that the at least one first fastening opening 313 of the first connection region 31 and the two second fastening openings 314 of the second connection region 32 lie at the corners of an imaginary isosceles triangle. In particular, the second connecting region 32 is intended and configured to be mounted on receiving elements 16 intended and configured for this purpose. For example, the receiving elements 16 may be mounting tabs with mounting holes on the profile frame 1 of one of the panel elements 100, between which the base plate 310 is arranged. In particular, the second connection region may be intended and configured to be partially arranged between mounting tabs of the other panel element and fixed by means of at least one retaining element 102 in each case. As can be seen in Figure 17B, a panel element 100 may be permanently mounted on vertical supports 900 of the scaffolding system. The plug connector 30 and one of the receiving elements 16 may form a hinge about which the plug connector 30 and the panel element 100, which is connected to the first connection region 31, can rotate. The other of the receiving elements 16, which is not connected to the plug connector 30 in Figure 17B, can form a latch with a further retaining element 102 when the rotatable panel element 100 is unfolded and thus aligned in extension with the fixed panel element 100. The plug connector 30 can thereby form, together with the receiving elements 16, a play-free, lockable hinge, wherein a receiving element 16 forms a hinge support and the plug connector 30 forms a hinge wing. Figures 18A to 18L show various views of the composite panel 200 and the scaffolding system 1000 as shown in Figures 17A and 17B. Figure 18A shows the composite panel 200 in an exploded view of the folded state. Figures 18B to 18D show the scaffolding system 1000 in the state shown in Figure 17B, in which the rotatable panel element 100 is folded, in a cross-sectional view, a three-dimensional view, and a top view, wherein the scaffolding system 1000 comprises a plurality of composite panels 200 mounted one above the other on vertical beams 900, and each composite panel 200 comprises two rotatably mounted panel elements 100 and two fixed panel elements 100 therebetween. Figures 18E and 18F show, in sectional views, stages during the unfolding of a pivotably mounted panel element 100. Figures 18G and 18H show, in a three-dimensional view and a top view, the pivotably mounted panel elements 100 unfolded by approximately 45°, while Figures 18I to 18L show the pivotably mounted panel elements 100 in fully unfolded states in corresponding views, with Figure 18I being an exploded view of Figure 18J. The features and embodiments described in connection with the figures may be combined with one another in accordance with further embodiments, even if not all combinations are explicitly described. Furthermore, the embodiments described in connection with the figures may alternatively or additionally include further features in accordance with the 5 description in the general part. The invention is not limited to the description based on the embodiments. Rather, the invention encompasses every new feature as well as every combination of features, which in 10 particular comprises every combination of features in the patent claims, even if that feature or combination is not itself explicitly stated in the patent claims or embodiments. List of reference signs 1    profile frame 2    plate 3    insert element 4    cross strut 5    folding platform 10   horizontal frame element 11   square profile 12   L-profile 14   surface 15 horizontal end region 16 receiving element 18 mounting hole 19 recess 20 vertical frame element 21 Z-profile 22 central part 23 first leg part 24 second leg part 25   vertical end region 28   mounting hole 29 fastening opening 30 plug connector 31 first connection region 32 second connection region 91 horizontal direction 92 vertical direction 93 depth direction 94 sliding direction 95 displacement direction 100 panel element 102 retaining element 103 spring retainer 200 composite panel 300 fixation region 301 first insertion region 302 second insertion region 303 first insertion direction 304 second insertion direction 310 base plate 311 first main surface 312 second main surface 313 first fastening opening 314 second fastening opening 315 insertion bevel 321 first plate element 322 second panel element 323 U-profile 330 first stop element 331 base surface 332 top surface 333 side surface 340 second stop element 351 first positioning element 352 first positioning element 353 second positioning element 354 second positioning element 900 vertical support 1000 scaffolding system 3101 plate element 3102 plate connecting element

Claims

Patent claims1. Plug connector (30) for connecting panel elements (100) for a scaffolding system (1000), wherein the plug connector (30) comprises:- a base plate (310) having a fixation region (300) and a first insertion region (301), wherein an arrangement direction from the fixation region (300) to the first insertion region (301) defines a first insertion direction (303) of the plug connector (30) for insertion into a frame element of one of the panel elements (100),- a first fastening opening (313) for a first retaining element (102),- at least a first stop element (330) in the fixation region (300) on a first main surface (311) of the base plate (310),wherein the first insertion region (301) and a first portion of the fixation region (300) form, together with a first portion of the first stop element (330), a first connection region (31) for the panel element (100).

2. Plug connector (30) according to claim 1, wherein the first fastening opening (313) is formed in the first insertion region (301).

3. Plug connector (30) according to any one of the preceding claims, wherein the first stop element (330) has a cylindrical shape, a truncated pyramid shape or a truncated cone shape.

4. Plug connector (30) according to claim 3, wherein the first stop element (330) has a base surface (331) in the shape of a hexagon, a rectangle or a rhombus.

5. Plug connector (30) according to any one of the preceding claims, wherein- a second stop element (340) is formed on a second main surface (312) of the base plate (310) opposite the first main surface (311) in the fixation region (300), and- the first connection region (31) comprises a first portion of the second stop element (340).

6. Plug connector (30) according to claim 5, wherein the first and second stop elements (330, 340) have a substantially identical outer contour.

7. Plug connector (30) according to any one of the preceding claims, wherein a first positioning element (351) in the form of an elevation on the base plate (310) is formed on the first main surface (311) between the first stop element (330) and the mounting opening (313).

8. Plug connector (30) according to claim 7, wherein a second positioning element (353) in the form of an elevation is formed on the base plate (310) on a second main surface (312) of the base plate (310) opposite the first main surface (311).

9. Plug connector (30) according to claim 8, wherein the first positioning element (351) and the second positioning element (353) have a substantially identical outer contour.

10. Plug connector (30) according to any one of thepreceding claims, wherein the fixation region (300) andthe first insertion region (301) are each formed symmetrically with respect to a plane of symmetry parallel to the first main surface (311).

11. Plug connector (30) according to any one of claims 1 to 10, wherein- the plug connector (30) comprises a second connection region (32) for a further of the panel elements (100),- the second connection region (329) comprises a second insertion region (302) and a second portion of the fixation region (300) with a second portion of the first stop element (330),- the fixation region (300) is arranged between the first and second insertion regions (301, 302),- the second connection region (32) comprises a second fastening opening (314) for a further retaining element (102),- an arrangement direction from the fixation region (300) to the second insertion region (302) defines a second insertion direction (304) of the plug connector (30) for insertion into a frame element of the further of the panel elements (100).

12. Plug connector (30) according to claim 11, wherein the first connection region (31) and the second connection region (32) are formed substantially symmetrically with respect to the fixation region.

13. Plug connector (30) according to any one of claims 1 to 10, wherein- the plug connector (30) comprises a second connection region (32) for a further panel element (100),- the second connection region (32) comprises a first plate element (321) and a second plate element (322), which are spaced apart from one another in a direction perpendicular to the first main surface (311) and which are intended and configured to partially encompass a portion of a frame element of the further panel element (100).

14. Plug connector (30) according to claim 13, wherein- the first and second plate elements (321, 322) each have at least two second fastening opening (314) for an additional retaining element (102) each, such that each of the retaining elements (102) can be inserted through a second fastening opening (314) of the first plate element (321) and a second fastening opening (314) of the second plate element (322), and- a further arrangement direction of the at least two second fastening openings (314) of the first plate element (321) and the at least two second fastening openings (314) of the second plate element (322) forms an angle greater than or equal to 0° and less than or equal to 180° with the first insertion direction (303).

15. Plug connector (30) according to claim 14, wherein the further arrangement direction and the first insertion direction (303) are perpendicular or parallel to each other.

16. Plug connector (30) according to any one of claims 13 to 15, wherein the first plate element (321) is fixed to the first stop element (330) and the second plate element (322) is fixed to the second stop element (340), or wherein the first plate element (321) and the secondplate element (322) are part of a U-profile that is fixed to the base plate (310).

17. Plug connector (30) according to any one of claims 1 to 10, wherein the base plate (310) is T-shaped and comprises a second connection region (32) for a further panel element (100).

18. Plug connector (30) according to claim 17, wherein at least one second fastening opening (314) for a further retaining element (102) is provided in the second connection region (32).

19. Plug connector (30) according to any one of the preceding claims, wherein the base plate (310) comprises a plurality of plate elements (3101) arranged one above the other.

20. Composite panel (200) comprising at least two panel elements (100) and at least one plug connector (30) according to any one of claims 1 to 19, wherein- the plug connector (30), with its first insertion region (301) and the first portion of its fixation region (300), is inserted into the frame element (10) of a first panel element (100),- the plug connector (30) is fastened to the first panel element (100) by means of the first retaining element (102) and to a second panel element (100) by means of at least one additional retaining element (102).

21. Composite panel (200) according to claim 20, wherein atleast a portion of a side surface(333) of the firststop element (330) is pressed against a recess (19) in the frame element (100) of the first panel element (100).5  22. Scaffolding system (1000) comprising- at least one vertical support (900),- at least one composite panel (200) according to claim 20 or 21, having at least one plug connector (30) according to any one of claims 1 to 19,10 wherein the at least one composite panel (200) is fastened to the vertical support (900).

Images