RAIL SYSTEM FOR PLASTER REMOVAL

Description

[0001] The invention relates to a rail system for plastering and is used in particular to provide one or more screeding edges and / or screeding surfaces for plastering a building wall. A rail system according to the preamble of claim 1 is known, for example, from DE 202 19 900 U1.

[0002] When plastering a building wall, the freshly applied plaster, e.g., by spraying, is usually smoothed using a float or trowel. The goal is to achieve the smoothest possible outer surface of the plaster and the most uniform thickness possible. To achieve this, it is advisable to provide screeding edges or surfaces along which the float or trowel can be guided during the smoothing process.

[0003] Edge profiles or end profiles can serve as a leveling aid at building corners and at side edges or transitions. The float or trowel is guided along the head of the profile. If plaster profiles are used, particularly at corners or transitions between building sections, corresponding leveling edges or surfaces can be provided on the plaster profiles. When plastering a larger, continuous area, it can be useful to provide additional leveling edges or surfaces as plastering gauges. For example, metal rails can be attached to the unplastered surface using dabs of mortar, which can then provide a leveling edge or surface. However, such metal rails have so far only been considered for plasters of typical thicknesses of a few centimeters, as they are designed to be lightweight and narrow to be easy to handle and attach.

[0004] However, there are also plasters that are applied in much greater thicknesses, such as thermal insulation plasters, which are also used as an alternative to external thermal insulation composite systems or to further improve the thermal protection of monolithic masonry. Such thermal insulation plasters are applied in thicknesses of, for example, 30 to 100 mm or more. For plasters that are applied in greater thicknesses (over 100 mm), the known options for providing leveling edges or surfaces are not sufficient. Furthermore, there is the additional problem, especially with thermal insulation plasters, that metal rails or other structures made of heat-conducting material embedded in the plaster can lead to thermal bridges, which reduce the thermal insulation across the surface and should therefore be avoided wherever possible.

[0005] It is an object of the invention to provide a rail system for providing one or more stripping edges and / or stripping surfaces for plastering a building wall, which can be used for stripping comparatively thick plaster layers with the lowest possible thermal bridge effect through the plaster layer.

[0006] The object is achieved by a rail system having the features of claim 1. Advantageous embodiments emerge from the dependent claims, the present description and the figures.

[0007] The rail system serves to provide one or more stripping edges and / or stripping surfaces for plastering a building wall, in particular with a plaster layer having a thickness of 100 mm or more. According to the invention, the rail system comprises at least one rail and at least two setting elements. The rail extends along a rail axis and has a connecting structure on a rear side facing perpendicular to the rail axis, as well as a stripping edge and / or a stripping surface on a front side opposite thereto.The setting elements each extend along a setting element axis from a fastening section to a connecting section of the respective setting element and are designed, on the one hand, to be fastened to the building wall with their respective fastening section and, on the other hand, to be connected to the connecting structure of the rail with their respective connecting section, such that the setting elements (when fastened to the building wall) hold the rail at a distance from the building wall and with the rail axis at least substantially parallel to the building wall. It is understood that the rail is only held in this way by the setting elements when the rail system is mounted on the building wall, i.e. the setting elements are actually fastened to the building wall with their respective fastening section and the rail is connected with its connecting structure to the connecting sections of the setting elements.The said fastening of a respective setting element with its fastening section to the building wall is not limited to an exclusively external fastening, but can also include the respective setting element with its fastening section being or being fastened, wholly or at least partially, directly in the building wall.

[0008] In principle, a single rail held by two setting elements can be sufficient to provide a stripping edge or surface. Therefore, a single rail and two setting elements together can form a rail system according to the invention. However, it is advantageous to fasten several rails, in particular arranged at least substantially parallel to one another and at regular intervals from one another, to the building wall by means of respective setting elements. In this way, a wall area between two rails can be stripped using a horsehair scraper whose length is greater than the distance between the two rails. Depending on the length of the rails, it may be expedient to use more than two setting elements per rail to hold the rail. The length of the rail can be, for example, 2.5 m or 3 m. Such a rail can, for example, be fastened to the building wall with two or three setting elements.Several such rails can be attached to the building wall, particularly vertically, for example at a distance of 2 m from each other.

[0009] Due to its extension along the rail axis, the rail is elongated. In particular, the rail has its longest extension along its rail axis. The rail can be designed, in particular, as a profiled bar. Preferably, the rail has an at least substantially constant cross-section perpendicular to its rail axis. The rail can be made of a metal, for example, galvanized steel.

[0010] The rear side of the rail is oriented towards the building wall when the rail is mounted, while the front side of the rail is oriented away from the building wall when the rail is mounted. As a result, the peel-off edge or peel-off surface provided on the front is also aligned accordingly. Preferably, the peel-off edge or the plane of the peel-off surface is aligned parallel to the building wall when mounted. The peel-off edge or peel-off surface can, in particular, extend over the entire length of the rail, i.e., over the entire extent of the rail along its rail axis.

[0011] The setting elements hold the rail, and in particular the screeding edge or surface provided on it, at a defined distance from the building wall, which determines the thickness of the applied plaster layer and the evenness of the plaster surface after screeding. Therefore, the setting elements, which have a length (extension along the setting element axis) in the range of 8 cm to 15 cm, enable the screeding of even comparatively thick plaster layers.

[0012] The setting elements, particularly in contrast to the rail, preferably comprise a material with the lowest possible thermal conductivity so that they do not form localized thermal bridges through the plaster layer. In particular, the setting elements can comprise a plastic as their material, for example, they can be made entirely of plastic. The thermal conductivity of a plastic used as the material for the setting element is preferably less than 1 W / (m·K), and in particular, it is preferred if it is less than 0.8 W / (m·K). Furthermore, the setting elements are preferably at least partially removable after plastering, as explained further below.If the setting elements are constructed in multiple parts and parts of the setting elements remain in the plaster even after plastering, at least these parts are advantageously made of a material with low thermal conductivity, preferably plastic with a thermal conductivity of less than 0.8 W / (m K). In principle, it is also possible to manufacture at least those parts of the setting elements that remain in the plaster from plaster material, such as plaster mortar, which sets in a suitable form and can then form a solid component.

[0013] Due to their extension along the respective setting element axis, the setting elements are elongated. In particular, each setting element has its longest extension along its setting element axis. Furthermore, the setting elements can be at least substantially rotationally symmetrical with respect to their respective setting element axis.

[0014] The fastening section and the connecting section of the respective setting element are provided at opposite ends of the longitudinal extension along the respective setting element axis. The respective setting element can be fastened to the building wall using the fastening section, preferably directly, i.e. in direct contact with the building wall. The setting element can be fastened at least partially directly in the building wall or merely from the outside to the building wall. For example, the setting element can be screwed to the building wall. In order to avoid time-consuming drilling, particularly in the case of concrete walls, it can be preferred if the setting elements are each designed to be glued to the building wall using the fastening section. In particular, self-adhesive hotmelt pads or other adhesives based on MS polymer (silane-modified polymer) can be used as the adhesive.In particular for such bonding, it is advantageous if the fastening section has the largest possible contact surface with which the setting element rests against the building wall when installed.

[0015] The setting elements are preferably each designed to be fastened to the building wall with their respective fastening section such that their respective setting element axis is aligned perpendicular to the building wall. For example, the aforementioned contact surface can be aligned perpendicular to the setting element axis for this purpose. However, particularly for an arrangement of rails in or on building corners, it can also be expedient to design the fastening sections of the setting elements such that the setting element axis of the respective setting element is aligned at an angle to the building wall when installed. For example, the setting element axis can be aligned in the direction of an angle bisector of the angle at which two building walls meet at the respective building corner.Alternatively, the rail system may comprise corner fastening parts with which a respective setting element, which is actually designed for an arrangement perpendicular to the building wall, can be fastened in or on a building corner in such a way that it is aligned at an angle to the two building walls which meet at the building corner, as will be explained in more detail below.

[0016] The fact that the setting elements are each designed to be fastened to the building wall with their respective fastening section does not just mean that they can in principle be fastened to the building wall in any way (like any other object), but means that they are designed in a concrete way, in particular with regard to the structure of the fastening section, specifically for the purpose of being fastened to the building wall, for example in that the fastening section has a contact surface in which holes for screws and / or one or more recesses for receiving a hot melt adhesive are formed.

[0017] Similarly, the fact that the setting elements are each designed to be connected to the connecting structure of the rail with their respective connecting section does not mean merely a basic connectability in any way, but that they are designed in a concrete way, in particular with regard to the structure of the connecting section, specifically for the purpose of a connection to the connecting structure of the rail, for example in that the connecting section has a connecting structure complementary to the connecting structure of the rail, so that the connecting structure of the rail and the complementary connecting structure of the connecting section of the respective setting element can be plugged into one another.

[0018] The rail system according to the invention, consisting of one or more rails and two or more setting elements, makes it possible to provide leveling edges and / or leveling surfaces even at a relatively large distance from the building wall to be plastered. This allows even relatively thick plasters to be reliably leveled.

[0019] According to an advantageous embodiment, the setting elements are adjustable in length along their respective setting element axes. In other words, the distance between the fastening section and the connecting section of each setting element can be adjusted. This also allows the distance of the rail mounted by means of the respective setting element (and thus the screed edge or surface) from the building wall to be adjusted within a certain range, preferably continuously. This can be used to accommodate different plaster layer thicknesses and / or to compensate for unevenness in the building wall.

[0020] In addition to or as an alternative to the length adjustability, the setting elements can also be designed so that the connecting structure of the rail can be connected to the connecting section of a respective setting element in at least two different ways, which differ in the position of the rail along the setting element axis of the respective setting element relative to the setting element. In particular, depending on which of the connection methods provided the rail is connected to the setting elements, the distance of the rail (and thus the peel-off edge or peel-off surface) from the fastening section of the setting element (and thus from the building wall) differs, so that at least two different distances can be set by selecting the connection method provided.A possible implementation of such a design of the setting elements using slots of varying depths provided at the connecting sections of the setting elements is described below. Being able to connect the rail to a respective setting element in two different positions along its setting element axis can be particularly advantageous when screed planes with a fixed distance are to be set for the application of multiple layers of plaster mortar.

[0021] According to a further advantageous embodiment, the setting elements and the rail are designed such that the connection between the connecting sections of the setting elements and the connecting structure of the rail is reversible, so that the rail can be removed from the building wall after the building wall has been plastered.

[0022] The reversible connection means, in particular, that it can be removed without damage, so that the components involved in the connection retain their functionality. In particular, the rail, which according to this design can be removed from the building wall even after plastering, can be immediately reused. The same applies in principle to the setting elements, provided they can also be fully or partially removed from the building wall after plastering, as explained further below.

[0023] The fact that the rail according to this embodiment can be removed from the building wall even after plastering is particularly important if the structure of the rail and the type of connection to the setting element are such that they do not prevent the rail from being removed from the plaster. This may include, for example, that in order to be released from the setting elements, the rail must be moved exclusively parallel to the setting element axis in the direction away from the building wall, and that the rail is shaped such that it does not engage behind the plaster with respect to the setting element axis after plastering.

[0024] In conjunction with the length-adjustability of the setting elements described above, the reversible connection of the rail to the setting elements can also be advantageous in that after applying a layer of plaster, the rail can be detached from the setting elements, the length of the setting elements can then be increased, and finally the rail can be reconnected to the setting elements so that the setting elements then hold it at a greater distance from the building wall. This allows another layer of plaster to be applied and removed along the same rail with minimal installation effort.

[0025] According to a further advantageous embodiment, the setting elements and the rail are designed such that the rail is connected to the setting elements by the connecting structure of the rail being pushed onto the connecting sections of the setting elements or inserted into the connecting sections of the setting elements. This includes both the setting elements and the rail being specifically designed with mutual connection in mind. For example, the setting elements, on the one hand, and the rail, on the other hand, can have complementary connecting structures so that they can be inserted into one another.

[0026] The connection between the rail and the setting elements can, in particular, be purely force-locking, which can allow for comparatively easy release of the connection. However, it can also be latching (possibly in addition to the force-locking) and thus have at least positive locking components. This positive locking can be overcome to release the rail from the setting elements, in particular by simply pulling.

[0027] The rail can, for example, be designed as a U-shaped profile. In this case, the rail can be attached to the connecting sections of the setting elements with the inner U-shaped area. The outer side of the base of the U-shaped section can have the removal edge or form the removal surface.

[0028] Alternatively, the rail can be designed, for example, as a T-shaped profile. In this case, the web of the T-shape (corresponding to the vertical line of the letter T) can be inserted into the connecting sections of the setting elements, which can each have a corresponding slot for this purpose. The outer side of the flange of the T-shape (corresponding to the horizontal line of the letter T) can have the removal edge or form the removal surface.

[0029] According to a further advantageous embodiment, the connecting section comprises a groove extending circumferentially around the setting element axis, and the rail, in particular the aforementioned connecting structure of the rail, has at least one locking projection with which it engages in the groove when the rail is connected to the setting elements. Such a configuration can be useful, for example, for a rail configured as a U-shaped profile, wherein the rail can have a corresponding locking projection on the inner sides of each of the two legs of the U-shape.

[0030] According to a further advantageous embodiment, the rail comprises at least one web as a connecting structure, and the connecting sections of the setting elements each comprise, as a connecting structure complementary to this connecting structure, at least one slot extending from an end face of the respective setting element along the setting element axis into the respective setting element, into which slot the web is inserted when the rail is connected to the setting elements. Such a configuration can be useful, for example, for a rail designed as a T-shaped profile.

[0031] The depth of the slot can, in particular, correspond to the length of the web in the profile cross-section or be smaller than this length, so that the depth of the slot determines the position the rail assumes along the setting element axis when the web is inserted as far as possible into the slot. In this respect, the distance of the rail (and thus the removal edge or surface) from the building wall can also be determined, at least in part, by the depth of the slot.

[0032] It can therefore be advantageous if the connecting sections of the setting elements each have several, particularly two, slots of different depths. Depending on which slot the rail is inserted into, different distances of the pull-off edge or surface from the building wall can then be set. Although only a few different distances can be set in this way, if the setting elements are adjustable in length, these distances can be modified to an extent corresponding to the length adjustability, so that the distance of the pull-off edge or surface from the building wall can be adjusted over a very wide range.

[0033] As already mentioned, an embodiment in which the rail can be connected to a respective setting element in two or more different positions along its setting element axis is particularly advantageous with regard to the application of multiple layers of plaster, the thickness of which can be precisely predetermined by the difference between two positions in which the rail can be fixedly arranged relative to the respective setting element. The rail can be mounted using the setting elements initially at a first distance from the building wall in order to apply a first layer of plaster and smooth it along the rail, and then mounted at a second (greater) distance from the building wall in order to apply a second layer of plaster and smooth it along the rail.

[0034] According to a further advantageous embodiment, the connecting section comprises at least a first connecting structure complementary to the connecting structure of the rail and a second connecting structure complementary to the connecting structure of the rail, wherein the rail, when its connecting structure is connected to the first complementary connecting structure of the connecting section of the respective setting element, assumes a different position along the setting element axis of the respective setting element than when it is connected to the second complementary connecting structure of the connecting section of the respective setting element. The position along the setting element axis that the rail assumes when using the first complementary connecting structure of the connecting section can differ from the position that the rail assumes when using the second complementary connecting structure of the connecting section, for example by 25 mm.

[0035] The first complementary connection structure and the second complementary connection structure can, in particular—as described above—be two slots of different depths formed in the connecting portions of the setting elements. For example, one slot can have a depth of 25 mm, while the other slot has a depth of 50 mm.

[0036] According to an advantageous development of this embodiment, the setting elements each comprise a rotating part that is mounted on the remaining setting element so as to be rotatable about the setting element axis and that comprises the connecting section. Depending on the rotational position of the rotating parts of the setting elements, the connecting structure of the rail can be connected to the first complementary connecting structures or to the second complementary connecting structures of the connecting sections of the setting elements. The axis of rotation about which the rotating part is rotatable is preferably parallel to or identical to the setting element axis of the respective setting element.The rotatable mounting can be achieved, for example, in that the rotating part has clamping tabs at an end of its extension along the setting element axis facing the fastening section of the respective setting element, which clamping tabs engage in an annular groove running circumferentially around the setting element axis, which is formed on the remaining setting element, in particular on a base body of the setting element.

[0037] Because the connecting sections are each formed on the rotating part of the respective setting element, it is possible to adjust which of the two complementary connecting structures is used to connect the rail to the setting elements by rotating the rotating part. In this way, a desired distance (or, in the case of length-adjustable setting elements: a desired distance range) of the rail (and thus the pull-off edge or pull-off surface) from the building wall can be set quickly and easily. The two connecting structures complementary to the connecting structure of the rail can, for example, be the aforementioned slots of different depths. In particular, these can then be aligned rotated relative to one another with respect to the axis of rotation of the rotating part, for example by 90°, so that the planes defined by the two slots are perpendicular to one another.

[0038] It is further advantageous if the setting elements are designed such that the rotating part can be detached from the remaining setting element, so that the rotating part can be removed from the building wall after the building wall has been plastered. A design of the rotating part so that it can be detached from the remaining setting element is advantageous, among other things, with regard to sustainability, as there is no material bond. Furthermore, at least part of the respective setting element can be dismantled in this way, which helps to minimize thermal bridges. Such a design includes, in particular, that the structure of the setting elements is such that it does not prevent the rotating part from being removed from the plaster.This may, for example, include the fact that the rotating part, in order to be released from the remaining respective setting element, must be moved exclusively parallel to the setting element axis in the direction away from the building wall and that the rotating part is shaped in such a way that it does not engage behind the plaster with respect to the setting element axis after plastering.

[0039] According to a further advantageous embodiment, the setting elements each comprise a base part, which has the fastening section, and a head part, which is formed separately from the base part and has the connecting section. The head part can essentially be identical to the aforementioned rotating part. Alternatively, the rotating part can also be formed as a component of the head part. For example, the head part can comprise a base body and the rotating part, which can then be mounted, in particular, on the base body.

[0040] The two-part design of the setting elements can be particularly useful with regard to being able to remove at least part of each setting element from the plaster and the building wall after the building wall has been plastered, as this demountability helps minimize thermal bridges. Furthermore, the demountable parts of the setting elements, like the rail, can be used multiple times. This saves costs and resources, which contributes to sustainability. Because the rail system can be at least partially dismantled and reused, the plaster layer also remains essentially free of foreign material.

[0041] In this respect, according to a further development of the above embodiment, it is advantageous if the setting elements are designed such that the head part and the foot part of the respective setting element can be detached from one another, so that the head part can be removed from the building wall after the building wall has been plastered. Such a design includes, in particular, that the structure of the head part is such that it does not prevent the head part from being removed from the plaster. This can include, for example, that in order to be detached from the foot part, the head part must be moved exclusively parallel to the setting element axis in the direction away from the building wall and that the head part is shaped such that it does not engage behind the plaster with respect to the setting element axis after plastering.

[0042] In particular, the base part can be the only part of the respective setting element that cannot be removed after the building wall has been plastered and therefore remains in the plaster. For this reason, it is advantageous if at least the base part of the respective setting element is made of a material with comparatively low thermal conductivity, for example, a plastic with a thermal conductivity of less than 1 W / (m K), in particular less than 0.8 W / (m K). In contrast, the materials of the remaining parts of the respective setting element do not necessarily need to be selected with a view to low thermal conductivity, provided that these parts can be removed from the building wall after the building wall has been plastered.

[0043] Preferably, the setting elements and the rail are designed such that, after plastering the building wall and dismantling the rail and head section of a respective setting element, the foot section of the respective setting element has a distance of at least 80 mm from the plaster surface, which can be achieved in particular by a suitable length of the head section. In conjunction with the low thermal conductivity of the foot section, a disadvantageous localized thermal bridge effect due to the use of the rail system according to the invention can thus be essentially eliminated.

[0044] According to a further advantageous embodiment, the foot part and the head part of the respective setting element can be fixed in different positions relative to one another along the setting element axis, i.e. can be coupled to one another in different positions relative to one another such that they maintain the respective position. The coupling can in principle be indirect. However, the coupling between the head part and the foot part is preferably direct. In particular, the aforementioned length adjustability of the setting elements can result precisely from the fact that the foot part and the head part of a respective setting element can assume different positions relative to one another along the setting element axis and can then be fixed in one of these positions relative to one another.

[0045] For example, the head part can be at least partially screwed into the foot part along the setting element axis, or conversely, the foot part can be at least partially screwed into the head part along the setting element axis, so that the head part and the foot part can assume different positions relative to one another along the setting element axis. Preferably, however, the length of the respective setting element can be adjusted more quickly and to a greater extent than would be possible with screws, namely by releasing the coupling between the head part and the foot part, moving the two parts along the setting element axis into the desired position relative to one another, and then re-establishing the coupling, as is particularly made possible by the following embodiment.

[0046] According to a further advantageous embodiment, the foot part and the head part are rotatable relative to one another in the circumferential direction about the setting element axis, wherein the foot part and the head part are displaceable relative to one another in a first relative rotational position (i.e. a rotational position of the foot part and the head part relative to one another) along the setting element axis, so that the length of the setting element can be adjusted by displacing the head part relative to the foot part, and are coupled to one another in a second relative rotational position such that they are locked against displacement relative to one another along the setting element axis, so that the set length is fixed as a result of the coupling (by rotating the head part relative to the foot part from the first relative rotational position into the second relative rotational position).It is preferred if the coupling is reversible, i.e. can be released again, in particular by rotating the head part and the foot part relative to each other from the second relative rotational position back into the first relative rotational position.

[0047] The coupling resulting from rotation from the first relative rotational position to the second relative rotational position can, for example, be force-locking, such as by clamping the foot part to the head part in the second relative rotational position (different from the first relative rotational position), or conversely, the head part to the foot part. Alternatively or additionally, the coupling can be form-locking, such as by providing coupling structures on the head part and the foot part, which engage behind one another in the second relative rotational position (different from the first relative rotational position) with respect to the setting element axis.

[0048] The second relative rotational position may differ from the first relative rotational position by, for example, 90°. In order to reliably rotate the head part relative to the base part, at least one engagement structure for a tool may be formed on the base part and / or, preferably, on the head part. This engagement structure may, in particular, be a hexagon socket or an external hexagon.

[0049] According to a further advantageous embodiment, the head part comprises a coupling section opposite the connecting section with respect to the setting element axis, which coupling section has a rod shape and extends along the setting element axis, wherein the foot part comprises a coupling receptacle opposite the fastening section with respect to the setting element axis, which coupling receptacle extends along the setting element axis and in which the coupling section of the head part is received with adjustable depth. In particular, the coupling section can protrude from the rest of the head part along the setting element axis in the direction away from the connecting section. The coupling receptacle can extend in particular from an end face facing the head part along the setting element axis in the direction of the fastening section into the foot part.If the head part comprises a base body and a rotating part rotatably mounted thereon, the base body in particular can have the coupling section.

[0050] Alternatively, the opposite can be provided: the foot part comprises a coupling section which is opposite the fastening section with respect to the setting element axis, which coupling section has a rod shape and extends along the setting element axis, wherein the head part comprises a coupling receptacle which is opposite the connecting section with respect to the setting element axis, which coupling receptacle extends along the setting element axis and in which the coupling section of the foot part is received with an adjustable depth. In particular, the coupling section can protrude from the rest of the foot part along the setting element axis in the direction away from the fastening section. The coupling receptacle can in particular extend from an end face facing the foot part along the setting element axis in the direction of the connecting section into the head part.If the head part comprises a base body and a rotating part rotatably mounted thereon, the base body in particular can have the coupling receptacle.

[0051] The fact that the coupling section is accommodated in the coupling receptacle with adjustable depth means in particular that the coupling section can be inserted into the coupling receptacle at different depths and then fixed at the respective depth, so that the head part and the foot part are fixed relative to one another in their then assumed position along the setting element axis. The coupling by which this fixing to a specific relative position takes place can in particular result from the, preferably direct, interaction of the coupling section and the coupling receptacle. Preferably, the coupling between the coupling section and the coupling receptacle can be brought about and preferably also released again by rotating the head part and the foot part relative to one another (and thus the coupling section in the coupling receptacle), as already explained above.

[0052] For example, the coupling section and the coupling receptacle can each have a cross-section that, when the head part and the foot part are in their first relative rotational position, has a greater extent in a first direction perpendicular to the setting element axis than in a second direction perpendicular to the setting element axis. The extent of the coupling section in the first direction is at least slightly greater than the extent of the coupling receptacle in the second direction, so that when the head part and the foot part are rotated into their second relative rotational position, the coupling section is clamped in the coupling receptacle in the manner of a press fit, thereby resulting in the coupling.

[0053] The cross-sections of the coupling section and the coupling receptacle can, for example, each be at least approximately round, such as oval or elliptical. Another possible cross-sectional shape results when a circular shape is flattened on two opposite sides, for example by parallel secants. The force-locking coupling resulting from the clamping effect can be supplemented by form-locking components, for example by the coupling section having corresponding structures on its outer side and / or the coupling receptacle having corresponding structures on its inner side, such as a thread or circumferential ribs.

[0054] As already mentioned, for an arrangement of rails in or on building corners, it may be expedient to design the fastening sections of the setting elements such that the setting element axis of the respective setting element, when installed, is not aligned perpendicularly but at an angle to the building wall. In order to enable both an arrangement with the setting element axis aligned perpendicularly to the building wall and an arrangement with the setting element axis aligned at an angle to the building wall, the rail system can, in addition to the at least two setting elements that are designed to be fastened to the building wall with their respective fastening section with the setting element axis aligned perpendicularly to the building wall, comprise at least two further setting elements that are designed to be angled to the building wall with their respective fastening section, i.e.To be attached to the building wall at an angle other than vertical, with the setting element axis aligned. Depending on whether a particular rail is to be attached to a wall surface of the building wall or to a building corner where two building walls meet, the corresponding setting elements of the rail system can be used.

[0055] Another possibility for enabling the attachment of setting elements to the building wall both perpendicular to the building wall and angled to the building wall is to provide two different base parts for each setting element. For example, the setting elements, particularly according to one of the embodiments described above, can each comprise a base part and a separately formed head part, but can also each comprise an additional base part so that this additional base part can be used as an alternative to the one base part.The two foot parts can be differentiated as a first foot part and a second foot part, wherein the first foot part has the fastening section and is designed such that the setting element is fastened to the building wall with this fastening section and with the setting element axis oriented perpendicular to the building wall, and the second foot part has an alternative fastening section and is designed such that the setting element is fastened to the building wall with this alternative fastening section and with the setting element axis oriented at an angle to the building wall other than perpendicular. The head part can be coupled optionally to the first foot part or to the second foot part in order to form a respective setting element that can be used to hold the rail to the building wall.

[0056] It can be provided that the fastening section on the first base part has a contact surface that is aligned perpendicular to the setting element axis in order to be fastened to the building wall with the contact surface resting against the building wall, and that the alternative fastening section on the second base part comprises two legs that are designed such that one of the two legs can be fastened to one of two building walls that meet at a building corner, in particular perpendicularly, and the other of the two legs can be fastened to the other of the two building walls. The legs can in particular be designed in one of the ways described below for the legs of a respective corner fastening part.In particular, the two legs can each have a contact surface and be designed to rest with this contact surface against a respective one of the two building walls when the leg is or is attached to the building wall, and / or can be pivotably mounted on the remaining base part about a joint axis perpendicular to the setting element axis and, if appropriate, parallel to the contact surfaces of the legs. The contact surfaces can, for example, each have an angle of 45° with respect to the setting element axis and be aligned perpendicular to one another.

[0057] The ability to attach setting elements with the setting element axis either perpendicular to the respective building wall or (particularly in the area of ​​building corners) at an angle can be achieved alternatively or in addition to the options described above by providing a type of adapter.

[0058] According to the invention, the rail system comprises two corner fastening parts, in particular formed separately from the setting elements and the rail, for fastening a respective setting element to a building corner where two building walls meet. Each of the corner fastening parts comprises a fastening base with a fastening surface designed to allow the fastening section of a respective setting element to be fastened thereto. Furthermore, each of the corner fastening parts comprises two legs designed to allow one of the two legs to be fastened to one of the two building walls and the other of the two legs to be fastened to the other of the two building walls.

[0059] This inventive design makes it possible to design the setting elements in such a way that the setting element axis of each setting element, when fastened directly to a building wall with its fastening section, is aligned perpendicular to the building wall, but nevertheless provides a simple way of fastening each setting element to a building corner in such a way that its setting element axis can be aligned at an angle to the two building walls that meet at the building corner. This is achieved by the aforementioned corner fastening parts. At least one, in particular exactly one, setting element can be fastened to a building corner via each of the corner fastening parts. In order to fasten at least one rail to the building corner, it is therefore expedient for the rail system to comprise at least two corner fastening parts.

[0060] The fact that the legs are designed to be attached to a respective one of the two building walls does not merely mean that they are generally suitable for this purpose, but rather that they are specifically designed, particularly with regard to their structure, for this purpose of being attached to a respective building wall. For example, each of the two legs can have a contact surface and be designed so that this contact surface rests against a respective one of the two building walls when the leg is or is attached to the building wall. The contact surface of one leg and the contact surface of the other leg can be aligned at a fixed angle to one another, which is then preferably 90°. However, it is also possible for this angle to be adjustable, as explained further below.

[0061] Each corner fastening component can be attached to a building corner, for example, by gluing, applying mortar, and / or screwing. For screwing, the two legs can each have a hole for a screw. The hole can extend, in particular, through the aforementioned contact surface of the respective leg. Furthermore, the hole can be an elongated hole, which allows for particularly flexible positioning of the respective screw and / or the use of more than one screw for each leg.

[0062] Preferably, the two legs are offset from one another with respect to an axis that is parallel to both the contact surface of one leg and the contact surface of the other leg, in particular such that a hole designed to receive a screw in one leg and a hole designed to receive a screw in the other leg are arranged at different positions with respect to this axis. In this way, it is avoided that screws with which the legs are fastened to a respective building corner can come into contact within the building walls. The said axis can in particular be a hinged axis about which the two legs can be pivotally mounted on the fastening base, as described in more detail below.

[0063] The fact that the fastening surface of the fastening base is designed so that the fastening section of a respective setting element can be fastened thereto does not merely mean that it is generally suitable for this purpose, but rather means that it is designed in a concrete manner, in particular with regard to its structure, specifically for this purpose of fastening the fastening section of a respective setting element to the fastening surface.

[0064] Preferably, the fastening surface of the fastening base is designed to be at least substantially complementary to the fastening section of a respective setting element. For example, the fastening surface of the fastening base of a corner fastening part and the fastening section, in particular the above-mentioned contact surface of the fastening section, of a setting element can each be completely flat and have at least substantially corresponding dimensions, for example the same square shape. In addition, the fastening base of the corner fastening part and the fastening section of the setting element can each have bores through which they can be screwed together. For this purpose, the bores formed in the fastening base can, in particular, be designed as threaded bores.Alternatively or in addition to screwing, it is also possible to attach a setting element with its fastening section to the fastening base of a corner fastening part by gluing or in some other way.

[0065] If a respective leg of the corner fastening part is arranged rigidly relative to the fastening base, the fastening surface of the fastening base preferably has an angle of 45° to the leg, in particular to a longitudinal extension and / or to the aforementioned contact surface of the leg. However, the angle can also be variable, in particular by arranging the legs so that they are movable relative to the fastening base.

[0066] According to an advantageous embodiment, the two legs are pivotably mounted on the mounting base about a joint axis parallel to the mounting surface of the mounting base and preferably also to the aforementioned contact surfaces of the two legs. In this way, the angle between the two legs can be adjusted, so that the corner fastening parts can be attached with their respective legs not only to building corners where two respective building walls meet at an angle of 90°, but can also be flexibly attached to more acute or obtuse building corners.

[0067] Furthermore, with such an embodiment, the fastening base can be pivoted relative to the two legs about the joint axis, so that the orientation of the fastening base can also be adjusted. This is preferably possible even after the legs have been attached to the respective building corner. This allows the angle at which the fastening surface of the fastening base is aligned relative to the two building walls that meet at the respective building corner to be adjusted. A setting element attached to a building corner by means of a corner fastening part is thus advantageously not fixed to a specific orientation, for example along an angle bisector of the two building walls, but can be flexibly aligned.

[0068] Preferably, the angle of the two legs relative to each other and / or the angle of the mounting base relative to the two legs is fixable, i.e., while it is adjustable, the adjustability can be selectively, preferably reversibly, suspended. For example, a fixing element can be provided by which the pivotability of the legs can be locked, in particular by positive or non-positive locking.

[0069] For providing one or more peeling edges and / or peeling surfaces at a building corner, the rail system may comprise special rails, in particular at least one further rail extending along a rail axis and having a connecting structure on a rear side pointing perpendicular to the rail axis.

[0070] This further rail can further have a pull-off edge on a front side opposite the rear side. For example, the further rail can have a simple strip shape and thus have a cross-section perpendicular to the rail axis, which corresponds to a straight line extending from a front end to a rear end. The front end of the cross-section corresponds to a front edge of the strip shape of the further rail, which is parallel to the rail axis, and the rear end of the cross-section corresponds to a rear edge of the strip shape of the further rail, which is parallel to the rail axis. The pull-off edge is then formed by the front edge. The connecting structure can be formed by a section of the further rail that encompasses the rear edge and can be connected, in particular by plugging in, to the connecting section of a respective setting element.

[0071] As an alternative to a simple strip shape, the further rail can, for example, also have an arrow shape in cross-section perpendicular to its rail axis, which differs from the aforementioned strip shape at least essentially only in that it additionally has the two legs of the arrowhead. As a result, the further rail in turn has a front edge which corresponds to the tip of the arrow shape and forms the stripping edge, as well as an opposite rear edge which corresponds to the end of the arrow shape, wherein the connecting structure in turn is formed by a section of the further rail which encompasses the rear edge and can be connected, in particular by plugging in, to the connecting section of a respective setting element. The outer sides of the legs of the arrow shape can also each form a stripping surface for plastering a respective one of the two building walls which meet at the corner of the building.

[0072] The invention is further explained below by way of example only with reference to the figures. Fig. 1 shows an alternative embodiment of a rail system according to the invention in a mounted state on a building wall. Fig. 2 shows the alternative embodiment of the invention in a partially sectioned view from a direction perpendicular to the setting element axis and the rail axis. Fig. 3 shows the alternative embodiment of the invention in a transparent view from a direction parallel to the rail axis. Figs. 4 and 5 show two setting elements and a rail of an embodiment of a rail system according to the invention in the mounted state in a first configuration and in a second configuration, respectively, wherein the configurations differ with regard to the distance of the rail from the building wall. Fig. 6 shows one of the setting elements of the Figs. 4 and 5shown embodiment in a partially sectioned view from a view parallel to the rail axis in the first configuration. Fig. 7 shows the rail of the Fig. 4 to 6 shown embodiment in cross section perpendicular to the rail axis. Fig. 8 shows the Fig. 6 shown setting element of the Fig. 4 to 7 shown embodiment from a view parallel to the rail axis in the second configuration. Figs. 9 to 11 show a corner fastening part of the Fig. 4 to 8 shown embodiment in two side views from different viewing directions and in a perspective view.

[0073] The figures show, on the one hand, an alternative embodiment to the invention and, on the other hand, an embodiment of a rail system 11 according to the invention. The alternative embodiment to the invention is shown in the Fig. 1 to 3 and the embodiment of the invention is shown in the Fig. 4 to 11 In both cases, the rail system 11 comprises a rail 13 and two setting elements 15, with which the rail 13 can be mounted on a building wall 17. For the alternative embodiment to the invention, the mounted state is shown in Fig. 1 shown, for the embodiment according to the invention it is shown in the Figs. 4 and 5 shown.

[0074] In both cases, the rail 13 extends with an at least substantially constant cross-section along a rail axis S and thus has an elongated shape, wherein the rail axis S is aligned parallel to the surface of the building wall 17 in the assembled state. On a rear side facing the building wall 17 in the assembled state, the rail 13 has a connecting structure 19. On the opposite front side, which thus faces away from the building wall 17 in the assembled state, the rail 13 has a removal surface 21 which, in the assembled state, is arranged at least substantially parallel to the surface of the building wall 17. The rail 13 and thus also the removal surface 21 are held by the setting elements 15 at a defined distance from the building wall 17.

[0075] The setting elements 15 are structurally identical to one another and each extend along a setting element axis A, to which the respective setting element 15 is at least substantially rotationally symmetrical, from a fastening section 23 to a connecting section 25. With their respective fastening section 23, the setting elements 15 are fastened to the building wall 17 at a distance of, for example, 2 m from one another and are aligned with their respective setting element axis A perpendicular to the surface of the building wall 17. As a result, the setting elements 15 are aligned parallel to one another. At their respective connecting section 25, the setting elements 15 are connected to the connecting structure 19 of the rail 13 in order to hold the rail 13 stably to the building wall 17.

[0076] Details of the alternative embodiment to the invention are given in the Fig. 2 and 3 can be seen in which the rail system 11 is partially cut ( Fig. 2 ) or transparent ( Fig. 3 ) is shown. Fig. 2 shows the rail system 11 from a direction perpendicular to the setting element axes A of the setting elements 15 and to the rail axis S of the rail 13. In Fig. 3 the rail system 11 is shown from a direction perpendicular to it and parallel to the rail axis S.

[0077] As in the Fig. 2 and 3 As can be seen, the setting elements 15 each comprise a base part 27 and a head part 29. The base part 27 has the fastening section 23 for fastening to the building wall 17 and, in the alternative embodiment to the invention, is designed as a type of dowel that is inserted into a hole in the building wall 17. The head part 29 has the connecting section 25, with which the respective setting element 15 is or can be connected to the rail 13.

[0078] On its side opposite the connecting section 19 with respect to the setting element axis A and thus facing the base part 27, the head part 29 comprises a coupling section 31 which has a rod shape and protrudes from the rest of the head part 29 along the setting element axis A. The dowel-like base part 27 has a coupling receptacle 33 which extends from an end face of the foot part 27 oriented towards the head part 29 along the setting element axis A into the base part 27 and is designed to at least partially accommodate the coupling section 31. The coupling section 31 can be inserted to different depths into the coupling receptacle 33, whereby the setting element 15 can be adjusted in its length (extension along the setting element axis A). In addition, the head part 29 is rotatable about the setting element axis A relative to the base part 27.

[0079] As in the comparison of the Fig. 2 and 3As can be seen, the coupling section 31 in the image plane of the Fig. 2 perpendicular to the setting element axis A a smaller extent than in the perpendicular image plane of the Fig. 3The coupling receptacle 33 is designed to be essentially complementary thereto. As a result, rotating the head part 29 relative to the foot part 27 from a first rotational position, in which the greatest extent of the coupling section 31 transversely to the setting element axis A and the greatest extent of the coupling receptacle 33 transversely to the setting element axis A are aligned parallel to one another, by 90° into a second rotational position in which they are aligned perpendicular to one another, results in the coupling section 31 becoming jammed in the coupling receptacle 33. As a result, the coupling section 31 is fixed to the depth with which it is inserted into the coupling receptacle 33, whereby the foot part 27 and the head part 29 are also fixed relative to one another in the position thus assumed along the setting element axis A. In this way, the setting element 15 is fixed to the resulting length.

[0080] In the alternative embodiment to the invention, the connecting section 25 provided on the head part 29 is formed by a circumferential extension whose diameter decreases slightly in the direction away from the building wall 17, so that its wall surface surrounding the setting element axis A is conical. This circumferential extension forms a connecting structure complementary to the connecting structure 19 of the rail 13. Directly below the circumferential extension (in the direction toward the building wall 17), the head part 29 has an engagement structure 35 in the form of an external hexagon so that it can be rotated relative to the foot part 27 using a wrench.

[0081] In the alternative embodiment to the invention, the rail 13 is designed as a profile whose cross section has at least substantially a U-shape, as shown in particular in Fig. 3can be seen, in which the rail 13 is shown spaced from the setting element 15, whereas in the Fig. 2 In the state shown, the rail 13 is connected to the setting elements 15. The outer side of the base of the U-shape forms the removal surface 21, while the inner region of the U-shape forms the connecting structure 19, with which the rail 13 can be plugged onto the connecting sections 25 of the setting elements 15. Through this type of connection, the rail 13 and the setting elements 15 are essentially connected to one another in a force-fitting manner, with the conical design of the connecting section 25 contributing to bringing about a reliable force-fitting connection.

[0082] Advantageously, the connection between the rail 13 and the setting elements 15 is detachable, as the rail 13 can be easily pulled off the setting elements 15. Furthermore, the head part 29 can also be detached from the foot part 27. At least detaching the rail 13, but preferably also detaching the head part 29, is still possible even after the building wall 17 has been plastered, as the rail 13 and the head part 29 are each designed in such a way that they do not engage behind the applied plaster. In this way, at least part of the rail system 11 can be dismantled after plastering, so that, essentially regardless of the material used for the rail 13 and for the (various parts of the) setting elements 15, it can be avoided that the rail system 11 leads to a multitude of localized thermal bridges within the plaster layer.

[0083] Also those in the Fig. 4 to 11The embodiment of a rail system 11 according to the invention shown comprises a rail 13 and two identical setting elements 15. In the Figs. 4 and 5 the rail 13 and the setting elements 15 are each shown in an arrangement in which they are mounted on a Figs. 4 and 5 not shown building wall 17 (cf. Fig. 6 ). The setting elements 15 are arranged with their fastening sections 23 in a common plane which corresponds to the surface of the building wall 17, and are aligned with their respective setting element axis A perpendicular to this plane.

[0084] At their connecting sections 25, the setting elements 15 are connected to the rail 13, so that the rail 13, with the rail axis S parallel to the said plane, is held by the setting elements 15 at a defined distance from the plane. As described in connection with the Figs. 6 and 8As will be explained in more detail below, two configurations of the connection of the rail 13 with the setting elements 15 are possible, in which the rail 13 is held at two different distances from the said plane. Fig. 4 shows the configuration in which the rail 13 is closer to the plane, and the Fig. 5 shows the configuration in which the rail 13 is further away from the plane.

[0085] The Figs. 6 and 8 show the embodiment according to the invention from a view direction parallel to the rail axis S, wherein the setting element 15 in Fig. 6is shown partially in section. In particular, it can be seen that the setting elements 15 also in the embodiment according to the invention each comprise a foot part 27 and a head part 29. The foot part 27 is designed as a type of base with a fastening section 23 shaped as a flange, which thereby has a comparatively large contact surface 37 with which it can rest against the building wall 17 for stable fastening. Figs. 4 and 5 It can be seen that the fastening section 23 has holes in the corners of its essentially square shape through which it can be screwed to the building wall 17. In addition, a recess 39 is formed within the contact surface 37, which runs around the setting element axis A (cf. Fig. 6), which serves to hold a hot-melt adhesive. In this way, the base part 27 can also be attached to the building wall 17 by gluing and thus without damaging the building wall 17.

[0086] As in the alternative embodiment to the invention, the head part 29 has a rod-shaped coupling section 31 on the side facing the foot part 27, which coupling section is partially received in a coupling receptacle 33 formed on the foot part 27. As in the alternative embodiment to the invention, the head part 29 is thereby rotatable relative to the foot part 27 about the setting element axis A. Depending on the respective relative rotational position of the head part 29 and the foot part 27, the head part 29 with the coupling section 31 can be displaced along the setting element axis A relative to the foot part 27 or can be locked against such displacement and thus fixed to a specific position along the setting element axis A relative to the foot part 27. In this way, a length of the respective setting element 15 can be adjusted.

[0087] The rail 13 of the embodiment according to the invention is designed as a T-shaped profile, as shown in particular in Fig. 7 can be seen, in which the rail 13 is shown separately. The outer side of the flange of this T-shape, which is at least largely double-layered, forms the pull-off surface 21 of the rail 13, while the web of the T-shape functions as the connecting structure 19 of the rail 13.

[0088] In the embodiment according to the invention, the head part 29 is formed in several parts and comprises a base body 41 and a rotating part 43. The coupling section 31 is provided on the base body 41. Furthermore, the base body 41 has an engagement structure 35 in the form of an external hexagon in the area between the rotating part 43 and the coupling section 31, so that the head part 29 can be rotated relative to the foot part 27 using a corresponding tool.

[0089] The rotating part 43 comprises the connecting section 25 of the setting element 15, which in turn comprises a first connecting structure 45 complementary to the connecting structure 19 of the rail 13 in the form of a slot, which extends from an end face of the rotating part 43 facing away from the building wall 17 along the setting element axis A into the rotating part 43. In Fig. 6 this slot (first complementary connecting structure 45) is aligned perpendicular to the image plane, whereas in Fig. 8 is aligned parallel to the image plane so that it cannot be seen there.

[0090] In addition, the connecting section 25 comprises a second connecting structure 47 complementary to the connecting structure 19 of the rail 13 in the form of a further slot, which also extends from the aforementioned end face of the rotating part 43 along the setting element axis A into the rotating part 43. This slot (second complementary connecting structure 47) is in Fig. 6parallel to the image plane and therefore not visible, whereas in Fig. 8 is aligned perpendicular to the image plane.

[0091] The two slots are therefore aligned perpendicular to each other. They also differ in that the slot forming the first complementary connecting structure 45 extends deeper, namely 25 mm deeper, into the rotating part 43 than the slot forming the second complementary connecting structure 47.

[0092] The rail 13, with its connecting structure 19 (web of the T-profile), can be connected either to the first complementary connecting structure 45 or to the second complementary connecting structure 47 of the connecting section 25 of the respective setting element 15. For a stable hold, it is inserted into the corresponding slot to the maximum depth. This holds the rail in different positions along the setting element axis A of the respective setting element 15, depending on which of the two complementary connecting structures 45, 47 is used. Because the setting elements 15 are also length-adjustable, the distance of the rail 13, and thus the removal surface 21, from the building wall 17 can be freely adjusted over a wide range.

[0093] Since the length of the web of the T-shape of the rail 13 essentially corresponds to the depth of the slot forming the first complementary connecting structure 45, namely 50 mm, the flange of the T-shape, when the connecting structure 19 of the rail 13 is connected to the first complementary connecting structure 45 of the respective setting element 15, lies at least essentially against the aforementioned end face of the rotating part 43. In contrast, when the connecting structure 19 of the rail 13 is connected to the second complementary connecting structure 47 of the respective setting element 15, the flange of the T-shape is spaced from the aforementioned end face, namely by a distance corresponding to the aforementioned difference between the depths of the two slots.

[0094] The rotating part 43 has, at an end of its extension along the setting element axis A opposite the connecting section 25, clamping tabs 49 which engage in an annular groove 51 of the base body 41 running in the circumferential direction around the setting element axis A (cf. Fig. 6 ). As a result, the rotating part 43 is mounted on the base body 41 so as to be rotatable about the setting element axis A. In this way, depending on the desired insertion depth of the connecting structure 19 of the rail 13 into the connecting sections 25 of the setting elements 15, the rotating parts 43 of the setting elements 15, which together hold the respective rail 13, can be aligned such that either one slot (first complementary connecting structures 45) or the other slot (second complementary connecting structures 47) lie in a common plane so that the rail 13 can be inserted therein. In this way, it is possible to quickly change between two distances of the rail 13 from the building wall 17.

[0095] The connection of the rail 13 to the setting elements 15 by inserting the connecting structure 19 of the rail 13 into the respective complementary connecting structure 45 or 47 of the connecting section 25 of the respective setting element 15 is essentially purely force-locking. This contributes to the fact that the rail 13 can be easily detached from the setting elements 15 by pulling along the respective setting element axis A.

[0096] To connect the rotating part 43 to the base body 41 of the head part 29 of the setting element 15, the rotating part 43 can be placed on the base body 41 in such a way that the clamping tabs 49 are first deflected radially outward with respect to the setting element axis A before finally engaging the annular groove 51 of the base body 41. This type of connection of the rotating part 43 to the base body 41 also allows the rotating part 43 and the base body 41 to be easily detached from one another.

[0097] In addition, as in the alternative embodiment to the invention, the entire head part 29 can be detached from the foot part 27 in the embodiment according to the invention by releasing the coupling between the head part 29 and the foot part 27 by rotating the head part 29 relative to the foot part 27. For this purpose, the head part 29 can have, in addition to or alternatively to the above-mentioned engagement structure 35, a (further) engagement structure 53 which is accessible from the outside even after the building wall 17 has been plastered. In the embodiment according to the invention, this (further) engagement structure 53 is formed on the base body 41 of the head part 29, namely as a hexagon socket, and can be reached from the outside with an appropriate tool through a central free space which the rotating part 43 has and which extends through the rotating part 43 along the setting element axis A.

[0098] Due to the aforementioned detachability, at least the rail 13, preferably also the rotating part 43, in particular the entire head part 29, of the setting element 15 can be removed from the building wall 17 even after the building wall 17 has been plastered. This is also made possible by the fact that these elements each have a shape whose cross-section does not widen towards the building wall 17, so that the applied plaster is not penetrated by these elements. The demountability of the aforementioned elements not only helps to avoid thermal bridges in the plaster, but also allows the removed elements to be reused, which is advantageous for cost and sustainability reasons.

[0099] The rail system 11 of the embodiment according to the invention further comprises at least two corner fastening parts 55. An exemplary corner fastening part 55 of the embodiment according to the invention is shown in the Fig. 9 to 11shown. In Fig. 9 The corner fastening part 55 is shown from a side view. A setting element 15 attached to the corner fastening part 55 is shown in broken lines. Fig. 10 the corner fastening part 55 without the setting element 15 attached to it is viewed from above (and thus perpendicular to the viewing direction of the Fig. 9 ), wherein the corner fastening part 55 is arranged at a building corner 57 where two building walls 17 meet. In Fig. 11 the corner fastening part 55 is shown in perspective together with a setting element 15 attached thereto.

[0100] The corner fastening part 55 comprises a fastening base 59 and two legs 61. A front side surface of the fastening base 59 forms a fastening surface 63, which is designed essentially to correspond to the contact surface 37 of the fastening section 23 of the setting element 15. In particular, the fastening surface 63 and the contact surface 37 are each at least essentially flat and have matching dimensions. In addition, the fastening surface 63 has bores at the same locations as the contact surface 37, which are designed as threaded bores in the fastening surface 63, so that the fastening section 23 of a respective setting element 15 can be fastened to the fastening base 59 by means of screws 65 (see. Figs. 9 and 11 ).

[0101] Opposite the fastening surface 63, the fastening base 59 is connected to the two legs 61 via a joint connection. The joint connection is formed by a shaft that extends parallel to the fastening surface 63 through bearing sections 67 of the fastening base 59 and through holes, of which each of the two legs 61 has one at one of its ends. As a result, both legs 61 are pivotally mounted on the fastening base 59 about a joint axis G parallel to the shaft. The fastening base 59 has three mutually parallel bearing sections 67, with the end of each leg 61 having the hole being arranged between each two bearing sections 67 (cf. Fig. 9). The aforementioned shaft is not visible in the figures, but only a screw 69, which is screwed into the shaft at one end. By tightening the screw 69, the two legs 61 can be clamped between the bearing sections 67 of the mounting base 59. The pivotability of the two legs 61 relative to the mounting base 59 or to each other can be locked in this way in a force-locking manner in order to fix the legs in a specific orientation relative to the mounting piece 59 or to each other.

[0102] The corner fastening part 55 is fastened to the building corner 57 via elongated holes 71, one of which is provided on each leg 61 and which extend over a large part of the length of the respective leg 61. One or more screws (not shown) can be screwed into the respective building wall 17 through the elongated holes 71 in order to fasten the corner fastening part 55 to the building corner 57. In principle, it would also be possible for the legs 61 to be glued to the respective building wall 17. The two legs 61 are offset from one another with respect to the joint axis G. This prevents screws that are screwed into the building walls 17 through the elongated holes 71 of the legs 61 in the area of ​​the building corner 57 from meeting one another within the building walls 17.

[0103] By providing the corner fastening parts 55, the rail system 11 enables a flexible arrangement of rails 13 even in the area of ​​building corners 57. This is because by means of the corner fastening parts 55, the setting elements 15, which hold a respective rail 13, can not only be reliably fastened to a building corner 57, but can also be flexibly aligned at an adjustable angle to the building walls 17 that meet at the building corner 57. Reference symbol

[0104] 11Rail system 13Rail 15Setting element 17Building wall 19Connecting structure 21Removal surface 23Fastening section 25Connecting section 27Foot section 29Head section 31Coupling section 33Coupling receptacle 35Engagement structure 37Contact surface 39Recess 41Base body 43Rotating part 45First complementary connecting structure 47Second complementary connecting structure 49Clamping lug 51Annular groove 53Engagement structure 55Corner fastening part 57Building corner 59Fastening base 61Leg 63Fastening surface 65Screw 67Bearing section 69Screw 71Elongated hole ASetting element axis GJoint axis SSrail axis

Claims

1. A rail system (11) for providing one or more removal edges and / or removal surfaces (21) for plastering a building wall (17), said rail system (11) comprising at least one rail (13), which extends along a rail axis (S) and which has a connection structure (19) at a rear side facing perpendicular to the rail axis (S) and a removal edge and / or a removal surface (21) at a front side opposite said rear side, and at least two setting elements (15) which each extend along a setting element axis (A) from a fastening section (23) to a connection section (25) and which are configured to be fastened, on the one hand, with their respective fastening section (23), in particular with the setting element axis (A) oriented perpendicular to the building wall (17), to the building wall (17) and, on the other hand, to be connected with their respective connection section (25) to the connection structure (19) of the rail (13) so that said setting elements (15) hold the rail (13) spaced apart from the building wall (17) and with the rail axis (S) at least substantially in parallel with the building wall (17), characterized in that the rail system (11) further comprises at least two corner fastening parts (55) for fastening a respective setting element (15) to a building corner (57) at which two building walls (17) meet, wherein the corner fastening parts (55) each comprise a fastening base (59) having a fastening surface (63), which is configured such that the fastening section (23) of a respective setting element (15) can be fastened thereto, and two legs (61) which are configured such that one of the two legs (61) can be fastened to one of the two building walls (17) and the other leg (61) can be fastened to the other building wall (17).

2. A rail system according to claim 1, wherein the setting elements (15) are longitudinally adjustable with respect to their extent along their respective setting element axis (A).

3. A rail system according to claim 1 or 2, wherein the setting elements (15) and the rail (13) are configured such that the connection between the connection sections (25) of the setting elements (15) and the connection structure (19) of the rail (13) is reversible so that the rail (13) can be removed from the building wall (17) after the plastering of the building wall (17).

4. A rail system according to any one of the preceding claims, wherein the setting elements (15) and the rail (13) are configured such that the rail (13) is connected to the setting elements (15) by plugging the connection structure (19) of the rail (13) onto the connection sections (25) of the setting elements (15) or into the connection sections (25) of the setting elements (15).

5. A rail system according to claim 4, wherein the rail (13) comprises, as the connection structure (19), at least one web and the connection sections (25) of the setting elements (15) comprise, as a mutually complementary connection structure (45, 47), in each case at least one slot which extends from an end face of the respective setting element (15) along the setting element axis (A) into the respective setting element (15) and into which the web is plugged when the rail (13) is connected to the setting elements (15).

6. A rail system according to any one of the preceding claims, wherein the setting elements (15) each comprise a foot part (27), which has the fastening section (23), and a head part (29) which is formed separately from the foot part (27) and which has the connection section (25).

7. A rail system according to claim 6, wherein the setting elements (15) are configured such that the head part (29) and the foot part (27) of the respective setting element (15) are releasable from one another so that the head part (29) can be removed from the building wall (17) after the plastering of the building wall (17).

8. A rail system according to claim 6 or 7, wherein the foot part (27) and the head part (29) can be fixed in different positions relative to one another along the setting element axis (A).

9. A rail system according to claim 8, wherein the head part (29) comprises a coupling section (31), which is opposite the connection section (25) with respect to the setting element axis (A), which has a rod shape and which extends along the setting element axis (A), and the foot part (27) comprises a coupling receiver (33) which is opposite the fastening section (23) with respect to the setting element axis (A), which extends along the setting element axis (A) and in which the coupling section (31) of the head part (29) is received with an adjustable depth; or wherein the foot part (27) comprises a coupling section (33) which is opposite the fastening section (23) with respect to the setting element axis (A), which has a rod shape and which extends along the setting element axis (A), and the head part (29) comprises a coupling receiver (33) which is opposite the connection section (25) with respect to the setting element axis (A), which extends along the setting element axis (A) and in which the coupling section (31) of the head part (29) is received with an adjustable depth.

10. A rail system according to any one of the preceding claims, wherein the two legs (61) are pivotably supported at the fastening base (59) about a joint axis (G) in parallel with the fastening surface (63).