Plaster peeling rail system

Abstract

A rail system for providing one or more screed edges and / or screed surfaces for plastering a building wall comprises at least one rail and at least two setting elements. The rail extends along a rail axis and has a connecting structure on its rear side perpendicular to the rail axis and a screed edge or screed surface on its opposite front side.The setting elements each extend along a setting element axis from a fastening section to a connecting section and are designed to be attached to the building wall on the one hand with their respective fastening section, in particular with a setting element axis oriented perpendicular to the building wall, and on the other hand with their respective connecting section to the connecting structure of the rail, so that they hold the rail spaced away from the building wall and with a rail axis that is at least substantially parallel to the building wall.

Description

[0001] The invention relates to a rail system for plaster leveling and serves in particular to provide one or more leveling edges and / or leveling surfaces for plastering a building wall.

[0002] Typically, when plastering a building wall, the plaster, freshly applied (e.g., by spraying), is smoothed using a float or straightedge. The aim is to create a surface that is as even as possible and has a uniform thickness. To achieve this, it is advisable to provide screed edges or surfaces along which the float or straightedge can be guided during the smoothing process.

[0003] Edge profiles or finishing profiles can serve as screeding aids at building corners and at lateral edges or transitions. The trowel or float is guided along the top of the profiles. If plastering profiles are used, especially at corners or transitions between building sections, corresponding screeding edges or surfaces can be provided on the plastering profiles. When plastering a larger continuous surface, it can be advantageous to provide additional screeding edges or surfaces as plastering guides. For example, metal rails can be attached to the unplastered surface using dabs of mortar, thus providing a screeding edge or surface. However, such metal rails are currently only suitable for plasters of typical thicknesses in the range of a few centimeters, as they are designed to be lightweight and narrow for ease of handling and attachment.

[0004] However, there are also plasters that are applied in significantly greater thicknesses, such as thermal insulation plasters, which are used as an alternative to external thermal insulation composite systems (ETICS) or to further improve the thermal insulation of monolithic masonry. These types of thermal insulation plasters are applied in thicknesses of, for example, 30 to 100 mm or more. For plasters applied in greater thicknesses (over 100 mm), the usual methods for providing screed edges or surfaces are insufficient. Furthermore, thermal insulation plasters, in particular, present the additional problem that metal rails or other structures made of thermally conductive material embedded in the plaster can create thermal bridges, which reduce the thermal insulation across the surface and should therefore be avoided whenever possible.

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

[0006] The problem is solved by a rail system with the features of claim 1. Advantageous embodiments are shown in the dependent claims, the present description and the figures.

[0007] The rail system serves to provide one or more screed edges and / or screed surfaces for plastering a building wall, particularly with a plaster layer that has 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 perpendicular to the rail axis and a screed edge and / or a screed surface on a front side opposite this.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 to be attached to the building wall with their respective fastening sections and to be connected to the rail's connecting structure with their respective connecting sections. This ensures that the setting elements (when attached to the building wall) hold the rail at a distance from the building wall and with a rail axis that is at least substantially parallel to the building wall. It is understood that the rail is only held in this manner by the setting elements if the rail system is mounted to the building wall, i.e., if the setting elements are actually attached to the building wall with their respective fastening sections and the rail is connected to the connecting sections of the setting elements via its connecting structure.The aforementioned 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, wholly or at least partially, directly fastened in the building wall.

[0008] In principle, a single rail held by two setting elements can suffice to provide a screeding 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 attach several rails, in particular arranged at least substantially parallel to each other and at regular intervals, to the building wall using individual setting elements. In this way, a section of wall between two rails can be screeded using a screed 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 in place. The length of the rail can be, for example, 2.5 m or 3 m. Such a rail can be attached to the building wall, for example, with two or three setting elements.Several such rails can be attached to the building wall, especially 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, in particular, be designed as a profile bar. Preferably, the rail has a cross-section perpendicular to its rail axis that is at least substantially constant. The rail can be made of a metal, for example, galvanized steel.

[0010] The aforementioned back side of the rail, when installed, faces the building wall, while the front side of the rail, when installed, faces away from the building wall. This also aligns the squeegee edge or surface provided on the front accordingly. Preferably, when installed, the squeegee edge or surface is parallel to the building wall. The squeegee edge or surface can, in particular, extend over the entire length of the rail, i.e., along its entire axis.

[0011] The setting elements hold the rail, and in particular the screed edge or surface attached to it, at a defined distance from the building wall. This distance determines the thickness of the applied plaster layer and the evenness of the plaster surface after screeding. Therefore, the setting elements, which, for example, have a length (extent along the setting element axis) of 8 cm to 15 cm, allow even relatively thick plaster layers to be screeded.

[0012] The setting elements, in contrast to the rail, preferably comprise a material with the lowest possible thermal conductivity to prevent the formation of localized thermal bridges through the plaster layer. In particular, the setting elements can be made of plastic, for example, entirely of plastic. Preferably, the thermal conductivity of a plastic used as the material for the setting element is 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 below. If the setting elements are multi-part and parts of them remain embedded in the plaster 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).K). In principle, it is also possible to produce at least those parts of the setting elements that remain in the plaster from plaster material, for example from plaster mortar that sets in a suitable form and can then form a solid component.

[0013] Due to their extension along their 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] At opposite ends of its longitudinal extension along the axis of each setting element, the fastening section and the connecting section of each setting element are provided. The fastening section allows the setting element to be attached to the building wall, preferably directly, i.e., in direct contact with the building wall. The setting element can be attached at least partially directly to the building wall or only to the outside of the building wall. For example, the setting element can be screwed to the building wall. To avoid the need for time-consuming drilling, particularly in concrete walls, it may be preferable for the setting elements to be designed to be glued to the building wall using the fastening section. Self-adhesive hot-melt pads or other adhesives based on MS polymer (silane-modified polymer) can be used as the adhesive.Especially 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 in the mounted state.

[0015] The setting elements are preferably designed to be attached to the building wall with their respective fastening sections in such a way that their respective setting element axis is oriented perpendicular to the building wall. For example, the aforementioned contact surface can be oriented perpendicular to the setting element axis. However, particularly for the arrangement of rails in or on building corners, it can also be advantageous to design the fastening sections of the setting elements so that the setting element axis of the respective setting element is angled to the building wall when installed. For example, the setting element axis can be oriented 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 can include corner fixing parts with which a respective setting element, which is actually designed for an arrangement perpendicular to the building wall, can be attached in or to a building corner in such a way that it is angled to the two building walls meeting at the building corner, as will be explained in more detail below.

[0016] The fact that the setting elements are each designed to be attached to the building wall with their respective fastening section does not merely mean that they can, in principle (like any other object), be attached to the building wall in any way, but rather means that they are specifically designed for the purpose of attachment to the building wall, particularly with regard to the structure of the fastening section, for example by having 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 rail's connection structure via their respective connecting section does not merely mean a basic connectability in some way, but rather that they are specifically designed for the purpose of connecting to the rail's connection structure, particularly with regard to the structure of the connecting section, for example by having a connection structure complementary to the rail's connection structure, so that the rail's connection structure and the complementary connection structure of the respective setting element's connecting section can be inserted 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 screed edges and / or screed surfaces even at a relatively large distance from the building wall to be plastered. This allows even plasters that are applied relatively thickly to be reliably screeded.

[0019] According to an advantageous embodiment, the setting elements are length-adjustable along their respective setting element axis. In other words, the distance between the mounting section and the connecting section of each setting element can be adjusted. This also allows the distance of the rail (and thus the screed edge or screed surface) mounted by means of the respective setting element from the building wall to be adjusted within a certain range, preferably continuously. This can serve 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 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. These different ways are distinguished by the position of the rail along the setting element axis relative to the setting element. In particular, depending on which of the connection methods is used to connect the rail to the setting elements, the distance of the rail (and thus the screed edge or screed surface) from the mounting 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.One possible implementation of such a design for the setting elements, using slots of varying depths 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 axis can be particularly advantageous when screeding surfaces with fixed spacing are required for applying 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 fact that the connection is reversible means, in particular, that it can be detached without damage, so that the components involved in the connection retain their function. Specifically, the rail, which according to this embodiment can also be removed from the building wall even after plastering, can thus be reused immediately. The same principle generally applies to the setting elements, provided they too can be completely or partially detached from the building wall after plastering, as will be explained further below.

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

[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 then increased, and finally the rail reconnected to the setting elements, so that it is then held at a greater distance from the building wall by the setting elements. In this way, another layer of plaster can be applied and leveled off on 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 either sliding the rail's connection structure onto the connecting sections of the setting elements or inserting it into the connecting sections of the setting elements. This includes the fact that both the setting elements and the rail are specifically designed for mutual connection. For example, the setting elements and the rail can have complementary connection structures so that they can be inserted into one another.

[0026] The connection between the rail and the setting elements can be purely friction-based, which allows for relatively easy release of the connection. However, it can also be detent-fit (possibly in addition to friction) and thus have at least positive locking components, whereby this positive locking can be overcome to release the rail from the setting elements, particularly 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 using the inner part of the U-shape. The outer side of the base of the U-shape can then form the squeegee edge or surface.

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

[0029] According to a further advantageous embodiment, the connecting section comprises a groove circumferentially around the axis of the setting element, 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 design can be advantageous, for example, for a rail designed as a U-shaped profile, wherein the rail can have a corresponding locking projection on each of the inner sides 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 at least one slot extending from an end face of the respective setting element along the axis of the setting element into the respective setting element, into which the web is inserted when the rail is connected to the setting elements. Such a design can be advantageous, for example, for a rail designed as a T-shaped profile.

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

[0032] It can therefore be advantageous if the connecting sections of the setting elements each have several, especially two, slots of different depths. Depending on which slot the rail is inserted into, different distances of the screed edge or screed surface from the building wall can then be set. While only a few different distances can be set in this way, if the setting elements are length-adjustable, these distances can be further modified by a factor corresponding to the length adjustment, so that the overall distance of the screed edge or screed 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 axis is particularly advantageous with regard to the application of multiple layers of plaster, the thickness of which can be precisely determined by the difference between two positions in which the rail can be fixed relative to the respective setting element. The rail can first be mounted at a distance from the building wall using the setting elements to apply and smooth a first layer of plaster, and then mounted at a second (greater) distance from the building wall to apply and smooth a second layer of plaster.

[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, occupies 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 occupies when using the first complementary connecting structure of the connecting section may differ from the position that the rail occupies when using the second complementary connecting structure of the connecting section by, for example, 25 mm.

[0035] The first complementary connection structure and the second complementary connection structure can, in particular – as described above – consist of two slots of different depths formed in the connection sections 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 further development of this embodiment, each setting element comprises a rotating part which is rotatably mounted on the remaining setting element about the setting element axis and which includes 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 with the setting element axis of the respective setting element.The rotatable bearing can be achieved, for example, by providing the rotating part with clamping tabs at an end of its extension along the axis of the setting element that points towards the fastening section of the respective setting element. These clamping tabs engage in an annular groove circumferentially around the axis of the setting element, which is formed on the remaining setting element, in particular on a base body of the setting element.

[0037] Because the connecting sections are formed on the rotating part of each setting element, rotating the rotating part allows the user to select which of the two complementary connection structures is used to connect the rail to the setting elements. This allows for quick and easy adjustment of the desired distance (or, in the case of adjustable-length setting elements, a desired distance range) between the rail (and thus the screed edge or surface) and the building wall. The two connection structures complementary to the rail's connection structure could, for example, be the aforementioned slots of different depths. In particular, these slots could be rotated relative to each other with respect to the rotating part's axis of rotation, for example, by 90°, so that the planes defined by the two slots are perpendicular to each other.

[0038] Furthermore, it is advantageous if the setting elements are designed so that the rotating part can be detached from the rest of the setting element, allowing the rotating part to be removed from the building wall after plastering. A design that allows the rotating part to be detached from the rest of the setting element is advantageous, among other things, with regard to sustainability, as there is no material bond. In addition, at least part of the setting element can be dismantled in this way, which helps to minimize thermal bridges. Such a design includes, in particular, ensuring that the structure of the setting elements is such that it does not impede the removal of the rotating part from the plaster.This can include, for example, that the rotating part, in order to be released from the rest of the 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 after plastering with respect to the setting element axis.

[0039] According to a further advantageous embodiment, the setting elements each comprise a base part having the fastening section and a head part formed separately from the base part, which has the connecting section. The head part can, in principle, 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 on the base body.

[0040] The two-part design of the setting elements can be particularly advantageous because, after plastering the building wall, at least part of each setting element can be removed from the plaster and the building wall itself. This reversibility helps to minimize thermal bridges. Furthermore, the removable parts of the setting elements, as well as the rail, can be reused multiple times. This saves costs and resources, contributing 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] Therefore, according to a further development of the above embodiment, it is advantageous if the setting elements are designed such that the head and foot sections of each setting element are detachable from one another, allowing the head section to be removed from the building wall after plastering. Such a design particularly includes the structure of the head section being such that it does not impede its removal from the plaster. This can, for example, include the head section needing to be moved away from the building wall exclusively parallel to the axis of the setting element in order to be detached from the foot section, and the head section being shaped in such a way that it does not engage behind the plaster after plastering with respect to the axis of the setting element.

[0042] In particular, the base may be the only part of the respective setting element that cannot be removed after the building wall has been plastered and therefore remains embedded in the plaster. For this reason, it is advantageous if at least the base 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), and especially less than 0.8 W / (mK). In contrast, the materials of the other parts of the respective setting element do not necessarily need to be selected with regard to low thermal conductivity, provided these parts can be removed from the building wall after it has been plastered.

[0043] Preferably, the setting elements and the rail are designed such that, after plastering the building wall and removing the rail and the head of each setting element, the base 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. In conjunction with a low thermal conductivity of the base, an adverse point thermal bridging 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 and head sections of the respective setting element can be fixed in different positions relative to each other along the setting element axis, i.e., coupled to each other in different positions relative to each other in such a way that they maintain their respective positions. The coupling can, in principle, be indirect. Preferably, however, the coupling between the head and foot sections is direct. In particular, the aforementioned length adjustability of the setting elements can result precisely from the fact that the foot and head sections of a respective setting element can assume different positions relative to each other along the setting element axis and can then be fixed in one of these positions relative to each other.

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

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

[0047] The coupling resulting from the rotation from the first relative rotation position to the second relative rotation position can be, for example, friction-fit, such as by clamping the foot section to the head section or vice versa in the second relative rotation position (unlike in the first relative rotation position). Alternatively or additionally, the coupling can be form-fit, for example, by providing coupling structures on both the head section and the foot section that interlock with each other in the second relative rotation position (unlike in the first relative rotation position) with respect to the axis of the setting element.

[0048] The second relative rotational position can differ from the first relative rotational position by, for example, 90°. To enable reliable rotation of the head relative to the base, at least one engagement structure for a tool can be provided on the base and / or, preferably, on the head; this engagement structure can be, in particular, an internal hexagon or an external hexagon.

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

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

[0051] The fact that the coupling section is received 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 and foot sections are thereby fixed in their respective positions along the axis of the setting element relative to each other. The coupling by which this fixing to a specific relative position is achieved can result, in particular, 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 and foot sections relative to each other (and thus the coupling section within the coupling receptacle), as already explained above.

[0052] For example, the coupling section and the coupling receptacle can each have a cross-section which, when the head and foot sections are in their first relative rotational position, has a larger 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 larger than the extent of the coupling receptacle in the second direction, so that when the head and foot sections are rotated into their second relative rotational position, the coupling section is clamped in the coupling receptacle in the manner of an interference fit, thus creating the coupling.

[0053] The cross-sections of the coupling section and the coupling receptacle can each be at least approximately round, for example 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 friction-fit coupling resulting from the clamping action can be further supplemented by form-fit components, for example by the coupling section having corresponding structures on its outer surface and / or the coupling receptacle having corresponding structures on its inner surface, such as a thread or circumferential ribs.

[0054] As already mentioned, for an arrangement of rails in or on building corners, it can be advantageous to design the fastening sections of the setting elements such that the setting element axis of each setting element is not perpendicular to the building wall, but rather at an angle, when installed. To allow for both an arrangement with the setting element axis perpendicular to the building wall and an arrangement with the setting element axis at an angle to the building wall, the rail system can, in addition to the at least two setting elements designed to be fastened to the building wall with their respective fastening sections and setting element axis perpendicular to the building wall, include at least two further setting elements designed to be fastened with their respective fastening sections at an angle to the building wall.The mounting elements are attached to the building wall at an angle other than perpendicular to the vertical. Depending on whether a particular rail is to be attached to a wall surface or to a building corner where two walls meet, the corresponding mounting elements of the rail system can then be used.

[0055] Another way to enable the attachment of setting elements to the building wall, both perpendicular and at an angle 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, may each comprise a base part and a separately formed head part, and may also each comprise a further base part so that this additional base part can be used as an alternative to the first.The two foot sections can be distinguished as the first foot section and the second foot section. The first foot section has the fastening section and is designed so that the setting element is attached to the building wall with this fastening section and its axis oriented perpendicular to the building wall. The second foot section has an alternative fastening section and is designed so that the setting element is attached to the building wall with this alternative fastening section and its axis oriented at an angle other than perpendicular to the building wall. The head section can be optionally coupled to either the first or the second foot section to form a setting element suitable for holding the rail to the building wall.

[0056] It may be provided that the fastening section on the first base part has a contact surface oriented perpendicular to the axis of the setting element in order to be attached to the building wall with the contact surface in contact with the building wall, and that the alternative fastening section on the second base part comprises two legs designed so that one of the two legs can be attached to one of two building walls meeting at a building corner, in particular perpendicularly, and the other of the two legs can be attached to the other of the two building walls. The legs can be designed in particular in one of the ways described below for the legs of a respective corner fastening part.In particular, each of the two legs can have a contact surface and be designed to rest against one of the two building walls when the leg is attached to the building wall, and / or be pivotably mounted on the remaining base section about a joint axis perpendicular to the setting element axis and, if applicable, 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 oriented perpendicular to each other.

[0057] The ability to attach setting elements either perpendicular to the respective building wall or (particularly in the area of ​​building corners) at an angle to the setting element axis can be achieved alternatively or additionally to the possibilities described above by providing a type of adapter. According to a further advantageous embodiment, the rail system comprises two corner fixing parts, which are designed separately from the setting elements and the rail, for attaching each setting element to a building corner where two building walls meet. Each of the corner fixing parts includes a fixing base with a fixing surface designed so that the fixing section of each setting element can be attached to it.Furthermore, each of the corner fixing parts includes two legs designed so that one of the two legs can be attached to one of the two building walls and the other of the two legs can be attached to the other of the two building walls.

[0058] Such an embodiment makes it possible to design the setting elements in such a way that the axis of each setting element, when attached directly to a building wall with its fastening section, is oriented perpendicular to the building wall, while still providing a simple means of attaching each setting element to a building corner in such a way that its axis can be angled relative to the two building walls meeting at the corner. This is achieved by the aforementioned corner fastening parts. At least one, and in particular exactly one, setting element can be attached to a building corner via each of the corner fastening parts. Therefore, in order to attach at least one rail to the building corner, it is advantageous for the rail system to comprise at least two corner fastening parts.

[0059] The fact that the legs are designed to be attached to 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 attachment to a specific building wall. For example, each leg can have a contact surface and be designed to rest against one of the two building walls when the leg is attached to, or is already 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 each other, preferably 90°. However, it is also possible for this angle to be adjustable, as will be explained further below.

[0060] Each corner bracket can be attached to a building corner by various means, such as gluing, setting with mortar, and / or screwing. For screwing, each leg can have a hole to accommodate a screw. This hole can extend through the contact surface of the respective leg. Furthermore, the hole can be elongated, allowing for more flexible positioning of the screw and / or the use of more than one screw per leg.

[0061] Preferably, the two legs are arranged offset from each other with respect to an axis that is parallel to both the mounting surface of one leg and the mounting 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. This prevents screws used to fasten the legs to a respective building corner from colliding within the building walls. The aforementioned axis can, in particular, be a pivot axis about which the two legs can be pivotally mounted on the mounting base, as described in more detail below.

[0062] The fact that the mounting surface of the mounting base is designed so that the mounting section of a respective setting element can be attached to it does not merely mean a basic suitability for this purpose, but rather that it is specifically designed, particularly with regard to its structure, for this purpose of attaching the mounting section of a respective setting element to the mounting surface.

[0063] Preferably, the mounting surface of the mounting base is designed to be at least substantially complementary to the mounting section of a respective setting element. For example, the mounting surface of the mounting base of a corner mounting element and the mounting section, in particular the contact surface of the mounting section of a setting element mentioned above, can each be completely flat and have at least substantially corresponding dimensions, such as the same square shape. Furthermore, the mounting base of the corner mounting element and the mounting section of the setting element can each have bores through which they can be screwed together. For this purpose, the bores formed in the mounting base can, in particular, be threaded bores.Alternatively or in addition to screwing, it is also generally possible to attach a setting element with its fastening section to the mounting base of a corner fixing part by gluing or in some other way.

[0064] If each leg of the corner mounting part is rigidly arranged relative to the mounting base, the mounting surface of the mounting 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 mounting base.

[0065] According to an advantageous embodiment, the two legs are pivotably mounted on the mounting base about a pivot 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 mounting elements with their respective legs can be attached 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.

[0066] Furthermore, in such an embodiment, the mounting base can be pivoted around the pivot axis relative to the two legs, thus allowing for adjustment of the mounting base's orientation. Preferably, this is also possible after the legs have been attached to the respective building corner. This allows for adjustment of the angle at which the mounting surface of the base is aligned relative to the two building walls that meet at the respective building corner. A corner element attached to a building corner by means of a corner mounting part is therefore advantageously not fixed to a specific orientation, for example, along an angle bisector of the two building walls, but can be flexibly aligned.

[0067] Preferably, the angle of the two legs to each other and / or the angle of the mounting base to the two legs is fixed, i.e., it is adjustable, but the adjustability can be selectively, preferably reversibly, suspended. For example, a fixing element can be provided by which the pivoting of the legs can be locked, in particular by positive locking or friction locking.

[0068] To provide one or more peeling edges and / or peeling surfaces at a building corner, the rail system may include special rails, in particular at least one further rail extending along a rail axis and having a connecting structure on a rear side perpendicular to the rail axis.

[0069] This additional rail can furthermore have a peel-off edge on a front side opposite the rear. For example, the additional rail can have a simple strip shape and thus a cross-section perpendicular to the rail axis, corresponding 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 additional rail parallel to the rail axis, and the rear end of the cross-section corresponds to a rear edge of the strip shape of the additional rail parallel to the rail axis. The peel-off edge is then formed by the front edge. The connection structure can be formed by a section of the additional rail that encompasses the rear edge and can be connected, in particular by insertion, to the connecting section of a respective setting element.

[0070] As an alternative to a simple strip shape, the additional rail can, for example, have an arrow shape in cross-section perpendicular to its axis. This arrow shape differs from the aforementioned strip shape essentially only in that it additionally features the two legs of the arrowhead. Thus, the additional rail again has a front edge corresponding to the tip of the arrowhead and forming the screeding edge, as well as a rear edge opposite it, corresponding to the end of the arrowhead. The connecting structure is formed by a section of the additional rail that encompasses the rear edge and can be connected to the connecting section of a respective setting element, particularly by insertion. Furthermore, the outer surfaces of the legs of the arrowhead can each form a screeding surface for plastering one of the two building walls meeting at the corner of the building.

[0071] The invention will be further explained below by way of example only, with reference to the figures. Fig. 1 shows a first embodiment of a rail system according to the invention in a state mounted on a building wall. Fig. 2 shows the first embodiment in a partially cutaway view from a perspective perpendicular to the axis of the setting element and the rail axis. Fig. 3 shows the first embodiment in a transparent view from a perspective parallel to the rail axis. Figs. 4 and 5 show a second embodiment of a rail system according to the invention in a mounted state in a first configuration and a second configuration, respectively, the configurations differing with respect to the distance of the rail from the building wall. Fig. 6 shows the second embodiment in a partially cutaway view from a perspective parallel to the rail axis in the first configuration. Fig. 7 shows the rail of the second embodiment in cross-section perpendicular to the rail axis.Figure 8 shows the second embodiment from a view parallel to the rail axis in the second configuration. Figures 9 to 11 show a corner fastening element, which in the second embodiment can be provided in addition to the rail and the setting elements, in two side views from different viewpoints as well as in a perspective view.

[0072] The figures show two embodiments of a rail system 11 according to the invention. The first embodiment is shown in the Figs. 1 to 3 and the second embodiment in the Figs. 4 to 8 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 first embodiment, the mounted state is shown in Fig. 1 shown, for the second embodiment it is in the Figs. 4 and 5 shown.

[0073] In both embodiments, the rail 13 extends along a rail axis S with at least substantially a constant cross-section and thus has an elongated shape, the rail axis S being aligned parallel to the surface of the building wall 17 in the installed state. On its rear side, which faces the building wall 17 in the installed state, the rail 13 has a connecting structure 19. On its opposite front side, which faces away from the building wall 17 in the installed state, the rail 13 has a squeegee 21 that is arranged at least substantially parallel to the surface of the building wall 17 in the installed state. The rail 13, and thus also the squeegee 21, is held at a defined distance from the building wall 17 by the setting elements 15.

[0074] The setting elements 15 are identical in construction and each extends along a setting element axis A, with respect to which the respective setting element 15 is at least substantially rotationally symmetrical, from a fastening section 23 to a connecting section 25. The setting elements 15 are attached to the building wall 17 at their respective fastening sections 23 at intervals of, for example, 2 m and are aligned with their respective setting element axis A perpendicular to the surface of the building wall 17. This ensures that the setting elements 15 are parallel to each other. At their respective connecting section 25, the setting elements 15 are connected to the connecting structure 19 of the rail 13 to hold the rail 13 securely to the building wall 17.

[0075] Details of the first embodiment are described in the Figs. 2 and 3 to recognize in which the first embodiment is partially cut ( Fig. 2 ) or transparent ( Fig. 3) is shown. Fig. 2 The rail system 11 is shown from a viewing direction perpendicular to the setting element axes A of the setting elements 15 and to the rail axis S of the rail 13. Fig. 3 The rail system 11 is shown from a viewing direction perpendicular to it and parallel to the rail axis S.

[0076] As in the Figs. 2 and 3 As can be seen, the setting elements 15 each comprise a base 27 and a head 29. The base 27 has the fastening section 23 for attachment to the building wall 17 and, in the first embodiment, is designed as a type of dowel that is inserted into a bore in the building wall 17. The head 29 has the connecting section 25, with which the respective setting element 15 is connected or can be connected to the rail 13.

[0077] On its side opposite the connecting section 19 with respect to the setting element axis A, and thus facing the base 27, the head 29 comprises a coupling section 31, which has a rod shape and projects from the rest of the head 29 along the setting element axis A. The dowel-like base 27 has a coupling receptacle 33, which extends from an end face of the base 27 facing the head 29 along the setting element axis A into the base 27 and is designed to at least partially receive the coupling section 31. The coupling section 31 can be inserted into the coupling receptacle 33 to varying depths, thereby allowing the length (extension along the setting element axis A) of the setting element 15 to be adjusted. Furthermore, the head 29 is rotatable about the setting element axis A relative to the base 27.

[0078] As in the comparison of the Figs. 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 image plane perpendicular to it. Fig. 3The coupling receptacle 33 is essentially designed to complement this. Thus, rotating the head section 29 relative to the foot section 27 from a first rotational position, in which the greatest dimension of the coupling section 31 is oriented transversely to the setting element axis A and the greatest dimension of the coupling receptacle 33 is oriented transversely to the setting element axis A parallel to each other, by 90° to a second rotational position, in which they are oriented perpendicular to each other, causes the coupling section 31 to wedge itself in the coupling receptacle 33. This fixes the coupling section 31 to the depth to which it is inserted into the coupling receptacle 33, thereby also fixing the foot section 27 and the head section 29 in the position they assume along the setting element axis A relative to each other. In this way, the setting element 15 is fixed to the resulting length.

[0079] In the first embodiment, the connecting section 25 provided on the head section 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 circumferencing the axis A of the setting elements is conical. This circumferential extension forms a connection structure complementary to the connection structure 19 of the rail 13. Directly below the circumferential extension (towards the building wall 17), the head section 29 has an engagement structure 35 in the form of an external hexagon, enabling it to be rotated relative to the foot section 27 using a wrench.

[0080] In the first embodiment, the rail 13 is designed as a profile whose cross-section has at least an essentially U-shape, as in particular in Fig. 3 This can be seen in the figure where the rail 13 is shown spaced apart from the setting element 15, whereas in the figure in Fig. 2In the depicted state, the rail 13 is connected to the setting elements 15. In this embodiment, the outer surface of the base of the U-shape forms the pull-off surface 21, and the inner surface of the U-shape forms the connecting structure 19, with which the rail 13 can be attached to the connecting sections 25 of the setting elements 15. This type of connection essentially creates a force-fit connection between the rail 13 and the setting elements 15, with the conical shape of the connecting section 25 contributing to a reliable force-fit.

[0081] Advantageously, the connection between the rail 13 and the setting elements 15 is detachable, as the rail 13 can simply be pulled off the setting elements 15. Furthermore, the head section 29 can also be detached from the foot section 27. At least the rail 13, and preferably also the head section 29, can still be detached even after the building wall 17 has been plastered, since the rail 13 and the head section 29 are designed in such a way that they do not penetrate 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 is possible to prevent the rail system 11 from creating numerous localized thermal bridges within the plaster layer.

[0082] Even those in the Figs. 4 to 8The second embodiment of a rail system 11 according to the invention, as 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 attached to a surface in the Figs. 4 and 5 not shown building wall 17 (see Fig. 6 ) can be mounted. The setting elements 15 are arranged with their fastening sections 23 in a common plane that corresponds to the surface of the building wall 17, and are aligned with their respective setting element axis A perpendicular to this plane.

[0083] At their connecting sections 25, the setting elements 15 are connected to the rail 13, so that the rail 13, with its rail axis S parallel to the aforementioned plane, is held by the setting elements 15 at a defined distance from the plane. As in connection with the Figs. 6 and 8As will be explained in more detail, two configurations of the connection between rail 13 and the setting elements 15 are possible, in which rail 13 is held at two different distances from the aforementioned plane. Fig. 4 shows the configuration in which rail 13 is closer to the plane, and the Fig. 5 shows the configuration in which rail 13 is further away from the plane.

[0084] The Figs. 6 and 8 The second embodiment is shown from a viewing direction parallel to the rail axis S, with the setting element 15 in Fig. 6The figure is shown partially cut away. This makes it particularly clear that the setting elements 15, in the second embodiment as well, each comprise a base 27 and a head 29. The base 27 is designed as a kind of plinth with a flange-shaped fastening section 23, which thus has a comparatively large contact surface 37 with which it can rest against the building wall 17 for stable fastening. In the Figs. 4 and 5 It can be seen that the fastening section 23 has bores in the corners of its essentially square shape, through which it can be screwed to the building wall 17. Furthermore, a recess 39 is formed within the contact surface 37, extending around the axis A of the setting element (see figure). 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.

[0085] As in the first embodiment, the head part 29 has a rod-shaped coupling section 31 on the side facing the foot part 27, which is partially received in a coupling receptacle 33 formed on the foot part 27. As in the first embodiment, this allows the head part 29 to be rotatable relative to the foot part 27 about the setting element axis A, whereby, 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 moved along the setting element axis A relative to the foot part 27, or it can be locked against such movement and thus fixed to a specific position along the setting element axis A relative to the foot part 27. In this way, the length of the respective setting element 15 can be adjusted.

[0086] In principle, the foot section 27 of the second embodiment could also be designed, as in the first embodiment, as a dowel-like attachment for fastening to the building wall 17, so that the coupling receptacle 33, in which the coupling section 31 of the head section 29 is or will be received, extends into the building wall 17. The head section 29 and the rail 21 can be designed, at least substantially unchanged, according to the [reference to the following]. Figs. 4 to 8 The second embodiment shown may be designed accordingly, whereby it may be advantageous to make the coupling section 31 slightly longer than shown in order to achieve the same overall distance from the building wall 17. A dowel-like design of the base part 27 may be advantageous insofar as it requires less material and / or is less complex to manufacture, which has a resource-saving and cost-saving effect.

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

[0088] In the second embodiment, the head part 29 is formed in multiple parts and comprises a base body 41 and a turned part 43. The coupling section 31 is provided on the base body 41. In addition, the base body 41 has an engagement structure 35 in the form of an external hexagon in the area between the turned part 43 and the coupling section 31, so that the head part 29 can be rotated relative to the foot part 27 by means of a suitable 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, extending 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. Fig. 6 This slit (first complementary connection structure 45) is oriented perpendicular to the image plane, whereas in Fig. 8 It is aligned parallel to the image plane, so that it is not visible there.

[0090] Furthermore, the connecting section 25 includes a second connecting structure 47, complementary to the connecting structure 19 of the rail 13, in the form of another 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. 6aligned parallel 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 oriented perpendicular to each other. Furthermore, they differ in that the slot forming the first complementary connection structure 45 extends deeper, namely 25 mm deeper, into the turned part 43 than the slot forming the second complementary connection structure 47.

[0092] The rail 13, with its connecting structure 19 (web of the T-profile), can be optionally connected to either the first complementary connecting structure 45 or the second complementary connecting structure 47 of the connecting section 25 of the respective setting element 15. For a secure hold, it is inserted as deeply as possible into the corresponding slot. This results in the rail being held 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 of the screed 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 connection structure 45, namely 50 mm, the flange of the T-shape, when the connection structure 19 of the rail 13 is connected to the first complementary connection structure 45 of the respective setting element 15, rests at least substantially against the aforementioned end face of the turned part 43. In contrast, when the connection structure 19 of the rail 13 is connected to the second complementary connection 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 turned part 43 has clamping tabs 49 at one end of its extension along the setting element axis A opposite the connecting section 25, which engage in an annular groove 51 of the base body 41 circumferentially around the setting element axis A (see figure). Fig. 6 This allows the rotating part 43 to be rotatably mounted on the base body 41 about the setting element axis A. In this way, depending on the desired insertion depth of the connection structure 19 of the rail 13 into the connection 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 so that either one set of slots (first complementary connection structures 45) or the other set of slots (second complementary connection structures 47) lie in a common plane, allowing the rail 13 to be inserted. This enables quick switching 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-fit. 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 turned part 43 to the base body 41 of the head 29 of the setting element 15, the turned part 43 can be placed onto the base body 41 such that the clamping tabs 49 are first deflected radially outwards with respect to the axis A of the setting element before finally engaging in the annular groove 51 of the base body 41. This type of connection between the turned part 43 and the base body 41 also allows the turned part 43 and the base body 41 to be easily separated again.

[0097] Furthermore, as in the first embodiment, the entire head section 29 can also be detached from the base section 27 in the second embodiment by rotating the head section 29 relative to the base section 27, thereby releasing the coupling between the head section 29 and the base section 27. For this purpose, the head section 29 can have, in addition to or as an alternative to the aforementioned engagement structure 35, a (further) engagement structure 53, which remains accessible from the outside even after the building wall 17 has been plastered. In the second embodiment, this (further) engagement structure 53 is formed on the base body 41 of the head section 29, namely as an internal hexagon, and can be accessed from the outside with a suitable tool through a central clearance in the rotating part 43, which extends along the setting element axis A through the rotating part 43.

[0098] Due to the aforementioned ease of removal, at least the rail 13, and preferably also the rotating part 43, and 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 reversibility of the aforementioned elements not only helps to avoid thermal bridges in the plaster, but also makes it possible to reuse the removed elements, which is advantageous for reasons of both cost and sustainability.

[0099] The rail system 11 can further comprise at least two corner fixing parts 55. An example of such a corner fixing part 55 is shown in the Figs. 9 to 11 shown. In Fig. 9The corner fixing part 55 is shown from a side view. A setting element 15 attached to the corner fixing part 55 is shown with dashed lines. Fig. 10 The corner fixing part 55 without the attached setting element 15 is viewed from a top-down perspective (and thus perpendicular to the viewing direction of the Fig. 9 ) shown, wherein the corner fixing 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 to it.

[0100] The corner mounting part 55 comprises a mounting base 59 and two legs 61. A front side surface of the mounting base 59 forms a mounting surface 63, which is essentially designed to correspond to the contact surface 37 of the mounting section 23 of the setting element 15. In particular, the mounting surface 63 and the contact surface 37 are each at least essentially flat and have identical dimensions. Furthermore, the mounting surface 63 has bores at the same locations as the contact surface 37, which are threaded bores in the case of the mounting surface 63, so that the mounting section 23 of a respective setting element 15 can be fastened to the mounting base 59 by means of screws 65 (see Figure 1). Figs. 9 and 11 ).

[0101] Opposite the mounting surface 63, the mounting base 59 is connected to the two legs 61 via a hinge connection. This hinge connection is formed by a shaft extending parallel to the mounting surface 63 through bearing sections 67 of the mounting base 59 and through holes, one of which is located at each end of each leg 61. This allows both legs 61 to pivot about a hinge axis G parallel to the shaft on the mounting base 59. The mounting base 59 has three bearing sections 67 arranged parallel to each other, with the end of each leg 61 containing the hole located between every two bearing sections 67 (see Figure 1). Fig. 9The figures do not show the shaft mentioned, 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 and to each other can thus be locked by friction, in order to fix the legs in a specific orientation relative to the mounting piece 59 and to each other.

[0102] The corner fixing element 55 is attached to the building corner 57 by means of elongated holes 71, one of which is present on each leg 61 and extends over a large portion of the length of the respective leg 61. One or more screws (not shown) can be screwed through the elongated holes 71 into the respective building wall 17 to fasten the corner fixing element 55 to the building corner 57. Alternatively, the legs 61 could also be glued to the respective building wall 17. The two legs 61 are offset from each other with respect to the pivot 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 colliding within the building walls 17.

[0103] By providing corner fixing 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 fixing parts 55, the setting elements 15, which hold a respective rail 13, can not only be reliably attached 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.

[0104] Furthermore, the invention also relates to the following embodiments of a rail system. 1. Rail system (11) for providing one or more screed edges and / or screed surfaces (21) for plastering a building wall (17), comprising at least one rail (13) extending along a rail axis (S) and having a connecting structure (19) on a rear side perpendicular to the rail axis (S) and a screed edge and / or a screed surface (21) on a front side opposite it, and comprising at least two setting elements (15) each extending along a setting element axis (A) from a fastening section (23) to a connecting section (25) and designed to be fastened to the building wall (17) on the one hand with their respective fastening section (23), in particular with a setting element axis (A) oriented perpendicular to the building wall (17), and on the other hand with their respective connecting section (25) to the connecting structure (19) of the rail (13),so that they hold the rail (13) spaced apart from the building wall (17) and with a rail axis (S) that is at least substantially parallel to the building wall (17). 2. Rail system according to embodiment 1, wherein the setting elements (15) are length-adjustable with respect to their extension along their respective setting element axis (A). 3. Rail system according to embodiment 1 or 2, wherein the setting elements (15) and the rail (13) are designed such that the connection between the connecting sections (25) of the setting elements (15) and the connecting structure (19) of the rail (13) is reversible, so that the rail (13) can be removed from the building wall (17) after the building wall (17) has been plastered. 4. Rail system according to one of the preceding embodiments, wherein the setting elements (15) and the rail (13) are designed such that the rail (13) is connected to the setting elements (15).by attaching the connecting structure (19) of the rail (13) to or inserting it into the connecting sections (25) of the setting elements (15). 5. Rail system according to embodiment 4, wherein the rail (13) as connecting structure (19) comprises at least one web and the connecting sections (25) of the setting elements (15) as complementary connecting structures (45, 47) each comprise at least one slot extending from an end face of the respective setting element (15) along the axis (A) of the setting element into the respective setting element (15), into which the web is inserted when the rail (13) is connected to the setting elements (15). 6. Rail system according to one of the preceding embodiments,wherein the connecting section (25) comprises at least a first connecting structure (45) complementary to the connecting structure (19) of the rail (13) and a second connecting structure (47) complementary to the connecting structure (19) of the rail (13), wherein the rail (13), when its connecting structure (19) is connected to the first complementary connecting structure (45) of the connecting section (25) of the respective setting element (15), assumes a different position along the setting element axis (A) of the respective setting element (15) than when it is connected to the second complementary connecting structure (47) of the connecting section (19) of the respective setting element (15). 7. Rail system according to embodiment 6, wherein the setting elements (15) each comprise a rotating part (43) which is rotatably mounted on the remaining respective setting element (15) about the setting element axis (A) and comprises the connecting section (25),and wherein the connecting structure (19) of the rail (13) can be connected to the first complementary connecting structures (45) or to the second complementary connecting structures (47), depending on the rotational position of the rotating parts (43) of the setting elements (15). 8. Rail system according to embodiment 7, wherein the setting elements (15) are designed such that the rotating part (43) can be detached from the remaining setting element (15), so that the rotating part (43) can be removed from the building wall (17) after the building wall (17) has been plastered. 9. Rail system according to one of the preceding embodiments, wherein the setting elements (15) each comprise a base part (27) having the fastening section (23) and a head part (29) formed separately from the base part (27) having the connecting section (25). 10. Rail system according to design 9, wherein the setting elements (15) are designed tothat the head (29) and the foot (27) of the respective setting element (15) are detachable from each other, so that the head (29) can be removed from the building wall (17) after the building wall (17) has been plastered. 11. Rail system according to embodiment 9 or 10, wherein the foot (27) and the head (29) can be fixed in different positions relative to each other along the setting element axis (A). 12. Rail system according to embodiment 11, wherein the foot (27) and the head (29) are rotatable circumferentially about the setting element axis (A) relative to each other, and wherein the foot (27) and the head (29) are displaceable relative to each other in a first relative rotational position along the setting element axis (A) and are coupled to each other in a second relative rotational position such that they are locked against displacement relative to each other along the setting element axis (A). 13. Rail system according to design 11 or 12,wherein the head section (29) comprises a coupling section (31) opposite the connecting section (25) with respect to the setting element axis (A), which has a rod shape and extends along the setting element axis (A), and the foot section (27) comprises a coupling receptacle (33) 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 section (29) is received with adjustable depth; or wherein the foot section (27) comprises a coupling section (31) opposite the fastening section (23) with respect to the setting element axis (A), which has a rod shape and extends along the setting element axis (A), and the head section (29) comprises a coupling receptacle (33) opposite the connecting section (25) with respect to the setting element axis (A),which extends along the axis (A) of the setting element and in which the coupling section (31) of the foot part (27) with adjustable depth is received. 14. Rail system according to one of the preceding embodiments, wherein 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) where two building walls (17) meet, wherein the corner fastening parts (55) each comprise a fastening base (59) with a fastening surface (63) designed so that the fastening section (23) of a respective setting element (15) can be attached to it, and comprise two legs (61) designed so that one of the two legs (61) can be attached to one of the two building walls (17) and the other leg (61) can be attached to the other building wall (17). 15. Rail system according to embodiment 14,wherein the two legs (61) are pivotably mounted on the mounting base (59) about a joint axis (G) parallel to the mounting surface (63). Reference sign

[0105] 11 Rail system 13 Rail 15 Setting element 17 Building wall 19 Connection structure 21 Pull-off surface 23 Mounting section 25 Connection section 27 Base part 29 Head part 31 Coupling section 33 Coupling receptacle 35 Engagement structure 37 Contact surface 39 Recess 41 Base body 43 Rotating part 45 First complementary connection structure 47 Second complementary connection structure 49 Clamping tab 51 Ring groove 53 Engagement structure 55 Corner mounting part 57 Building corner 59 Mounting base 61 Leg 63 Mounting surface 65 Screw 67 Bearing section 69 Screw 71 Slotted hole A Setting element axis G Joint axis S Rail axis

Claims

1. A rail system (11) for providing one or more stripping edges and / or stripping surfaces (21) for plastering a building wall (17), comprising at least one rail (13) extending along a rail axis (S) and having a connecting structure (19) on a rear side facing perpendicular to the rail axis (S) and a stripping edge and / or a stripping surface (21) on a front side opposite thereto, as well as at least two setting elements (15), each extending along a setting element axis (A) from a fastening section (23) to a connecting section (25) and designed, on the one hand, to be fastened to the building wall (17) with their respective fastening section (23), in particular with the setting element axis (A) oriented perpendicular to the building wall (17), and, on the other hand, to be connected to the connecting structure (19) of the rail (13) with their respective connecting section (25).so that they hold the rail (13) at a distance from the building wall (17) and with the rail axis (S) at least substantially parallel to the building wall (17), wherein the setting elements (15) each comprise a foot part (27) having the fastening section (23), and a head part (29) formed separately from the foot part (27) and having the connecting section (25), and wherein the foot part (27) and the head part (29) can be fixed in different positions along the setting element axis (A) relative to one another, characterized by thatthe foot part (27) and the head part (29) are rotatable relative to one another in the circumferential direction about the setting element axis (A), wherein the foot part (27) and the head part (29) are displaceable relative to one another in a first relative rotational position along the setting element axis (A) 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 (A).

2. Rail system according to claim 1, wherein the setting elements (15) and the rail (13) are designed such that the connection between the connecting sections (25) of the setting elements (15) and the connecting structure (19) of the rail (13) is reversible, so that the rail (13) can be removed from the building wall (17) after the building wall (17) has been plastered.

3. Rail system according to one of the preceding claims, wherein the setting elements (15) and the rail (13) are designed such that the rail (13) is connected to the setting elements (15) by the connecting structure (19) of the rail (13) being plugged onto the connecting sections (25) of the setting elements (15) or being plugged into the connecting sections (25) of the setting elements (15).

4. Rail system according to claim 3, wherein the rail (13) comprises at least one web as a connecting structure (19) and the connecting sections (25) of the setting elements (15) as a complementary connecting structure (45, 47) each comprise at least one slot extending from an end face of the respective setting element (15) along the setting element axis (A) into the respective setting element (15), into which slot the web is inserted when the rail (13) is connected to the setting elements (15).

5. Rail system according to one of the preceding claims, wherein the setting elements (15) are designed such that the head part (29) and the foot part (27) of the respective setting element (15) are detachable 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).

6. Rail system according to one of the preceding claims, wherein the head part (29) comprises a coupling section (31) opposite the connecting section (25) with respect to the setting element axis (A), which has a rod shape and extends along the setting element axis (A), and the foot part (27) comprises a coupling receptacle (33) 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 (31) opposite the fastening section (23) with respect to the setting element axis (A), which has a rod shape and extends along the setting element axis (A), and the head part (29) comprises a coupling receptacle (33) opposite the connecting 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 foot part (27) is received with an adjustable depth.; 7. Rail system according to one of the preceding claims, wherein 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) with a fastening surface (63) which is designed such that the fastening section (23) of a respective setting element (15) can be fastened thereto, and comprise two legs (61) which are designed 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).

8. Rail system according to claim 7, wherein the two legs (61) are pivotally mounted on the fastening base (59) about a joint axis (G) parallel to the fastening surface (63).

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