Fastening device for attaching a fitting to a frame having a groove of a building locking device, as well as building locking device

Abstract

The invention relates to a fastening device (5) for fastening a fitting part (4) to a frame (2) of a building locking device (1) having a groove (6), comprising a first rear grip element (9) and a second rear grip element (10), which can be inserted separately into the groove (6) and, when arranged together, are held in the groove (6) by interlocking opposing groove edges (12, 13) limiting the groove (6), for which purpose the rear grip elements (9, 10) have rear grip webs (17, 18) that run parallel to each other and to a longitudinal center axis (20) of the fastening device (5) and which run continuously parallel to an imaginary longitudinal center plane (19) that accommodates the longitudinal center axis (20).The invention provides that the first rear grip element (9) has a first inclined surface (31) and the second rear grip element (10) has a second inclined surface (32) for at least partial contact with the first inclined surface (31), wherein the two rear grip elements (9, 10) are designed such that when the rear grip elements (9, 10) are moved towards each other longitudinally along the longitudinal center axis (20), they are forced apart transversely along the longitudinal center axis (20). The invention further relates to a building locking device (1) and a method for attaching a fitting part (4).

Description

[0001] The invention relates to a fastening device for attaching a fitting part to a frame of a building locking device having a groove, comprising a first rear grip element and a second rear grip element, which can be inserted separately into the groove and, when arranged together, are held in the groove in a form-fitting manner by interlocking opposing groove-bounding groove rails, wherein the rear grip elements have rear grip webs running parallel to each other and to a longitudinal center axis of the fastening device, which run continuously parallel to an imaginary longitudinal center plane receiving the longitudinal center axis, wherein the first rear grip element has a first inclined surface and the second rear grip element has a second inclined surface for at least partial contact with the first inclined surface.wherein the two inclined surfaces are angled relative to an imaginary normal plane perpendicular to the longitudinal center axis. The invention further relates to a building locking device with a frame and a fitting part attached to the frame by means of a fastening device, as well as a method for attaching a fitting part to a frame of a building locking device.

[0002] For example, the prior art document DE 202 21 378 U1 describes a fastening of a fitting component, in particular a hinge component of a hinge for doors, windows and the like, to a profile bar which has an outwardly open profile groove on the fastening side, comprising opposing edge lips that define the opening of the profile groove, wherein the fitting component comprises a fastening component abutting the profile bar and is associated with a clamping component which can be clamped against the fastening component by means of at least one fastening element extending through the opening of the profile groove such that the edge lips of the profile groove are clamped between the fastening component and the clamping component, wherein the clamping component comprises at least two parts which are designed such that they can be guided through the opening of the profile grooves and subsequently positioned in such a way thatthat the parts each engage behind one of the edge lips, and that the parts of the clamping element, in the assembled state of the clamping element, engage mutually behind each other, and that each of the parts can be clamped against the fastening element with at least one fastening means. It is provided that the parts have an identical shape.

[0003] Furthermore, the publication DE 20 2004 011 539 U1 discloses a band for fastening to a sash or frame profile, which has a profile groove with a C-shaped cross-section and profile extensions, comprising a sash band part and a frame band part, wherein at least one of the sash or frame band parts has a fastening part which, in the assembled state, rests against the outside of the sash or frame profile, and has a clamping device engaging in the profile groove.The clamping device includes a projection provided on the fastening part which engages one of the profile projections, a clamping element engaging the other profile projection is provided which is mounted to the fastening part in such a way that the latter is pulled against the sash or frame profile, and means are provided by which, when the clamping element is moved to the fastening part in the sense of clamping, at least the projection of the fastening part is moved transversely to the longitudinal direction of the profile groove into the profile.

[0004] Furthermore, the printed document DE 7 7221 834 U shows a hinge band.

[0005] The object of the invention is to propose a fastening device for attaching a fitting part to a frame of a building locking device, which has advantages over known fastening devices, in particular ensuring quick and easy assembly as well as a permanently reliable fastening of the fitting part to the frame.

[0006] According to the invention, this is achieved with a fastening device for attaching a fitting part to a frame of a building locking device having a groove and the features of claim 1. It is provided that the two rear grip elements are designed such that when the rear grip elements are displaced longitudinally towards each other along the longitudinal center axis, the rear grip elements are forced apart transversely to the longitudinal center axis, wherein the first rear grip element is directly and the second rear grip element is only indirectly, in particular via the first rear grip element and / or the frame, attached to a base plate, which has larger dimensions in the transverse direction than the rear grip elements abutting each other via the inclined surfaces, in order to engage the groove and to bear on the groove edges.

[0007] Advantageous embodiments with appropriate further developments of the invention are specified in the dependent claims.

[0008] The fastening device is preferably an integral part of the building locking device and secures the fitting to the frame or to a frame member. Of course, the fastening device can also be separate from the building locking device. The building locking device is designed, for example, as a window, door, or the like. It preferably has a frame and a sash, the sash being rotatably mounted relative to the frame about at least one axis, preferably several. For this purpose, the sash is rotatably mounted on the frame by means of a pivot bearing. The sash preferably has or carries glazing, for example, single glazing or multiple glazing.

[0009] The frame is preferably designed and installed for fixed mounting on a building, in particular for fixed mounting in a recess of the building envelope. The sash, on the other hand, is movable or rotatably mounted such that it can be positioned relative to the frame in both a closed position and at least one open position. In the closed position, the sash at least partially, and preferably completely, closes a recess bounded by the frame. In the open position, the sash at least partially exposes the recess. For example, in the closed position, a sash plane defined by the sash lies in or parallel to a frame plane defined by the frame.

[0010] If the building locking device is designed and configured solely for turn-only or tilt-only opening, then there is only a single axis of rotation about which the sash frame is rotatably mounted relative to the frame by means of a pivot bearing. If the building locking device is designed such that both turn-only and tilt-only opening are possible, the sash frame is preferably rotatably mounted relative to the frame about several different axes of rotation, namely at least or exactly two axes of rotation, by means of a pivot bearing. The axes of rotation are preferably angled relative to each other or are skew to one another. Particularly preferably, the multiple axes of rotation form an angle with each other that is approximately or exactly 90°. A building locking device designed for both turn-only and tilt-only opening can be referred to as a turn-and-tilt building locking device.If the building closure device is in the form of a window, it can be referred to as a tilt-and-turn window.

[0011] Both the frame and the sash frame consist of several mullions that are attached to one another. Preferably, there are four mullions in each frame, with two of the mullions arranged parallel to each other so that they together form a rectangle. However, other arrangements of the mullions are also possible in principle. The mullions of the frame are also referred to as frame mullions, and the mullions of the sash frame are also referred to as sash frame mullions.

[0012] The building locking device includes a fitting, in particular the pivot bearing forming a component of this fitting. The fitting includes at least the fitting part, which is attached to the frame, especially the frame itself, by means of the fastening device. Of course, the fitting part can also be attached to the sash frame by means of the fastening device. The only important factor here is that the frame has the groove into which the fastening device engages to secure the fitting part to the frame. The fitting part is preferably a component of the pivot bearing or a pivot bearing of the pivot bearing.

[0013] The pivot bearing can be designed as a corner pivot bearing or as an axle pivot bearing. In the former case, it directly serves to rotatably support the sash frame and the frame relative to each other. For this purpose, it is preferably hinged or rigidly attached to the frame on one side and to the sash frame on the other. In the case of the axle pivot bearing, the pivot bearing serves to rotatably support an axle arm, particularly on the frame. The axle arm is rotatably connected to the frame via the pivot bearing. It is also rotatably connected to the sash frame via a separate pivot bearing.

[0014] The frame to which the fitting is attached, or at least is to be attached, is connected via the groove. The groove is designed as a T-slot in one of the frame members. Accordingly, the groove has a cavity that transitions into an opening of the groove, bounded by spaced-apart opposing groove edges, and opens through this opening, in particular, into an external environment. The groove extends in the direction of a longitudinal center axis of the frame member in which it is formed. Preferably, the groove extends in this direction over a large proportion of the longitudinal extent of the member, in particular over at least 80%, at least 90%, or over the entire longitudinal extent of the member. The groove has a consistently uniform cross-section in the longitudinal direction.

[0015] The groove opening lies entirely within a plane parallel to the longitudinal center axis of the spar, encompassing the groove edges. A vertical axis of the spar is perpendicular to both the groove opening plane and the longitudinal center axis. A transverse axis of the groove is also perpendicular to the longitudinal center axis and the vertical axis, thus forming a Cartesian coordinate system. The groove cavity has specific dimensions along the transverse axis, which can also be referred to as the groove width. The groove opening, in contrast, has dimensions along the transverse axis, which are referred to as the groove width. The groove width corresponds to the distance between the groove edges that define the opening on both sides along the transverse axis.The opening width is smaller than the groove width, so the groove is tapered in the area of ​​the opening, forming the groove edges.

[0016] This frame design allows for a positive-locking attachment of the fitting to the frame by means of the fastening device engaging in the groove. For this purpose, the fastening device has two engagement elements: the first and the second. These are designed so that they can be inserted into the groove separately, i.e., spaced apart and / or offset from each other. If, however, the engagement elements are arranged next to each other, neither insertion into nor removal from the groove is possible.

[0017] During assembly of the fastening device, the engagement elements are inserted separately into the groove and then arranged next to each other. This allows the engagement elements to grip behind the groove edges and hold the fastening device in the groove. For this purpose, the engagement elements have engagement ribs which, when the engagement elements are arranged next to each other as intended, project in opposite directions in the groove, specifically in the direction of the transverse axis. Each engagement rib grips behind one of the groove edges, thus positively locking the engagement elements and the fastening device in the groove. The engagement ribs run along a longitudinal center axis of the fastening device, which is preferably parallel to the longitudinal center axis of the groove or the stile. More precisely, they lie parallel to it.the rear gripping webs preferably in an imaginary plane that runs parallel to the longitudinal center axis of the fastening device or parallel to the longitudinal center plane of the fastening device, which continuously incorporates the longitudinal center axis of the fastening device.

[0018] To achieve particularly rapid installation of the fastening device in the groove and a particularly reliable and durable fastening of the fitting to the frame by means of the fastening device, the rebate elements should each have a beveled surface; namely, the first rebate element has the first beveled surface and the second rebate element has the second beveled surface. The beveled surfaces are preferably continuously flat. The beveled surfaces are designed and arranged such that, when the rebate elements are arranged against each other, they come into contact with one another and consequently abut each other. Furthermore, they are oriented such that, when the rebate elements are subsequently moved towards each other in the direction of the longitudinal center axis of the fastening device or in the longitudinal direction of the groove, they are pushed apart perpendicular to the longitudinal center axis and thus beneath the edges of the groove.

[0019] This results not only in a clamping effect of the fastening device on the frame, but also in the rear gripping elements being pressed against each other laterally, particularly at their angled surfaces. Due to the static friction between the rear gripping elements, a holding force is generated that fixes the rear gripping elements to each other in the direction of the longitudinal center axis of the fastening device. Accordingly, the rear gripping elements are reliably held against each other, thus reliably preventing the fastening device and therefore the fitting from detaching from the frame.

[0020] The inclined surfaces are angled relative to the normal plane. The normal plane is perpendicular to the longitudinal center plane and preferably runs parallel to the longitudinal center axis of the fastening device. This means, in particular, that any imaginary plane lying completely within the respective inclined surface forms an angle with the normal plane that is greater than 0° and less than 180°. The angle is particularly preferably greater than 0° and less than 90°, and especially less than 45°. More preferably, the angle is at least 5° and at most 40°, at least 10° and at least 35°, or at least 15° and at most 30°. Therefore, it is not necessary for the normal plane to actually intersect the respective inclined surface.However, it is of course possible to define a separate normal plane for each of the inclined surfaces, which is both perpendicular to the longitudinal center plane and parallel to the longitudinal center axis, intersecting the respective inclined surface.

[0021] The described design of the fastening device has the advantage that not only is the fastening device reliably and permanently held to the frame, particularly in the frame's groove, but that the rear gripping elements of the fastening device are also firmly fixed to one another due to the frictional force between them. Accordingly, the fastening device cannot unintentionally detach from the frame; rather, the rear gripping elements are reliably and permanently held in the groove. In principle, the frame can be made of any material. However, aluminum or an aluminum alloy is particularly preferred as the material for the frame. Such a frame places particularly high demands on the quality of the connection between the frame and the fitting, since the frame material thickness is typically quite small.

[0022] According to the invention, the first rear grip element is attached directly, and the second rear grip element is attached only indirectly, in particular via the first rear grip element and / or the frame, to a base plate. The base plate has larger dimensions in the transverse direction than the rear grip elements abutting each other via their inclined surfaces, in order to engage the groove and bear on the groove edges. In addition to the first and second rear grip elements, the base plate forms part of the fastening device. It is attached to the first rear grip element, for example, by screwing or riveting it. This means that the base plate is attached to the first rear grip element by means of at least one screw or at least one rivet, preferably by means of several screws, in particular two screws, or several rivets, in particular two rivets.

[0023] The fastening device is designed such that, after the rear gripping elements are inserted into the groove, the base plate is positioned outside the groove. More precisely, the base plate, with its underside facing the rear gripping element, rests on the groove edges and is supported by them in the direction of the groove. The base plate has dimensions in the transverse direction, or perpendicular to the longitudinal center axis of the fastening device, that are at least larger than the dimensions of the groove's openings in the same direction. Particularly preferably, the base plate has at least the same or even larger dimensions in the transverse direction than the groove. Particularly preferably, the base plate is designed such that it completely overlaps both groove edges in the transverse direction.

[0024] Using the base plate outside the groove allows for particularly reliable attachment of the fitting to the frame, as this improves the retention of the rear grip elements and reliably prevents the entire fastening device from tilting. Preferably, the first rear grip element is positioned on the frame together with the base plate. When the first rear grip element is inserted into the groove, it is already attached to the base plate, allowing for a single assembly of the first rear grip element and the base plate on the frame. This enables particularly quick and easy assembly, as it significantly simplifies the arrangement of the two rear grip elements relative to each other in the groove.

[0025] A further development of the invention provides that the first rear grip element has a first positive locking device and the second rear grip element has a second positive locking device that interacts positively with the first positive locking device and holds the rear grip elements together in a vertical direction perpendicular to the longitudinal center axis. The two rear grip elements interact not only via their inclined surfaces, but also via the two positive locking devices, namely the first positive locking device and the second positive locking device. The two positive locking devices interact positively to fasten the rear grip elements together in the vertical direction in at least one direction, preferably in opposite directions. In particular, the positive locking devices also align the rear grip elements relative to each other in the vertical direction.This ensures with particular reliability that the inclined surfaces of the rear gripping elements remain permanently in contact with each other and cannot, for example, become disengaged in the vertical direction. This design of the fastening device further increases reliability.

[0026] A further development of the invention provides that each of the positive locking devices has a positive locking web extending from a base body of the respective rear gripping element, wherein the positive locking webs of the positive locking devices bear against each other at least temporarily in an imaginary plane, in particular arranged parallel to the longitudinal median plane or angled with respect to it. Each of the rear gripping elements thus has a base body and a positive locking web. The positive locking web of each of the positive locking devices extends from the corresponding base body.

[0027] After the fastening device is mounted to the frame, the positive locking lugs lie against each other in the vertical direction, thus supporting each other in this direction. This ensures that the rear gripping elements are held in the vertical position. The positive locking lugs lie against each other in the imaginary plane, so that surface contact between the positive locking lugs is achieved and the positive locking devices, and therefore the rear gripping elements, are supported against each other particularly reliably.

[0028] The imaginary plane is, for example, arranged parallel to the longitudinal center plane. This allows for particularly easy assembly of the fastening device. Preferably, however, the imaginary plane is angled with respect to the longitudinal center plane, thus forming an angle with it that is greater than 0° and less than 180°. For example, the angle between the imaginary plane and the longitudinal center plane is at least 5° and at most 30°, at least 10° or at most 20°, or approximately or exactly 15°.

[0029] The imaginary plane is angled with respect to the longitudinal center plane in such a way that a transverse displacement of the rear gripping elements towards each other forces them apart in the vertical direction, and conversely, a vertical displacement of the rear gripping elements towards each other forces them apart in the transverse direction. This results in additional wedging or interlocking of the rear gripping elements against each other, so that they are held together particularly reliably by static friction.

[0030] A further development of the invention provides that the positive locking rib of the first positive locking device, together with the base plate, defines a positive locking recess into which the positive locking rib of the second positive locking device engages to hold the rear gripping elements together in the vertical direction. Thus, it is not merely intended that the positive locking ribs abut each other to hold the rear gripping elements together in the vertical direction. Rather, the positive locking recess is located in the vertical direction between the base plate and the positive locking rib of the first positive locking device. The positive locking rib of the second positive locking device engages in this recess, at least after the fastening device has been mounted on the frame, so that the positive locking devices are fixed to each other in opposite directions in the vertical direction.

[0031] Particularly preferred in such a design is the imaginary plane in which the interlocking webs abut each other, angled relative to the longitudinal center plane in the manner already described. When the rear-engaging elements are moved transversely towards each other, the interlocking web of the second interlocking element is pressed against the base plate by the interlocking web of the first interlocking element, so that additional friction arises between the interlocking web of the second interlocking element and the base plate, which secures the rear-engaging elements against each other. This effectively prevents the rear-engaging elements from unintentionally dislodging from the groove.

[0032] A further development of the invention provides that the inclined surfaces on the interlocking ribs and / or the base bodies are formed as the rear gripping elements. In principle, the inclined surfaces can be configured arbitrarily on the rear gripping elements, as long as they fulfill the function already described, namely that they push the two rear gripping elements apart in the transverse direction when they are moved towards each other in the longitudinal direction. Particularly preferably, the inclined surfaces are present at least on the interlocking ribs, specifically on their end faces facing away from the respective base body. However, the inclined surfaces can also be formed on the base bodies or on both the interlocking ribs and the base bodies. This achieves redundancy between the inclined surfaces.

[0033] A further development of the invention provides that at least one of the inclined surfaces is composed of several inclined surface regions that are spaced apart from one another in the longitudinal direction and, viewed in a section plane parallel to the longitudinal median plane, run parallel to one another or are aligned with one another. The inclined surfaces are therefore not necessarily continuous inclined surfaces, but can each consist of several inclined surface regions. Each of the inclined surface regions is particularly preferably continuous and planar, i.e., a flat surface. The division of the inclined surface into the several inclined surface regions is effected in particular by an interruption of the inclined surfaces, for example by an edge, a rounding, a chamfer, or the like.

[0034] The inclined surface areas are spaced apart from one another in the direction of the longitudinal center axis of the fastening device, for example by at least 40%, at least 50%, or at least 60% of the total extent of the respective rear gripping element in this direction. In each case, the inclined surface areas lie in the same plane, this plane being parallel to the longitudinal center plane. In the section plane, which is also parallel to the longitudinal center plane, the inclined surface areas are spaced apart and arranged parallel to each other or are aligned with each other. This means, in particular, that each of the inclined surface areas lies completely in an imaginary plane, and these imaginary planes are arranged parallel to each other or coincide with each other.If one of the support elements has multiple inclined surface areas, the other support element preferably rests with its inclined surface against at least some of the inclined surface areas, and particularly preferably against all of them. This results in excellent support in the transverse direction.

[0035] A further development of the invention provides that the rear gripping ribs of the rear gripping elements each have a ramp and / or radius extending along their entire longitudinal extent and transition into the base body via this, so that during assembly of the fastening device, the rear gripping ribs engage the groove edges and press the fastening device into the groove. The sides of the rear gripping ribs facing the groove edges are not continuously flat, but are designed with the ramp or radius. Preferably, the sides of the rear gripping ribs facing the groove edges are continuously flat on their side facing away from the base body, i.e., they have a flat surface there. This flat surface transitions into the base body via the ramp or radius, with the ramp or radius facing the respective groove edge in the direction of the base body.

[0036] This ensures that when the rear gripping elements are forced apart during the assembly of the fastening device, the rear gripping ribs move upwards towards the groove edges, thus forcing the rear gripping elements into the groove. This creates additional friction between the rear gripping ribs and the groove edges, which holds the rear gripping elements securely in the groove. Furthermore, the base plate is also pressed against the groove edges. This results in a higher frictional force, further securing the rear gripping elements. This is particularly true if the rear gripping elements are positively connected to each other via the positive locking devices.

[0037] A further development of the invention provides that each of the rear gripping elements has an end face and a flat first sub-surface of the end face forms the respective inclined surface, which is angled at a certain angle to the normal plane, wherein at least a flat second sub-surface of at least one of the end faces runs parallel to the longitudinal center axis and / or a flat third sub-surface of at least one of the end faces is angled at an angle other than the certain angle to the normal plane and / or a flat fourth sub-surface of at least one of the end faces is oriented perpendicular to the longitudinal center axis.

[0038] The term "end surface" refers in particular to a surface of the respective rear grip element located on the side of the rear grip element facing away from the rear grip web in the transverse direction. The end surface of each rear grip element is specifically located on the side of the rear grip element facing the other rear grip element. The end surface may have or include one or more of the following surfaces: the flat first sub-surface, the flat second sub-surface, the flat third sub-surface, and the flat fourth sub-surface.

[0039] The sub-surfaces differ primarily in their orientation relative to the longitudinal center axis and / or the normal plane. The first sub-surface lies entirely in a first plane, the second sub-surface entirely in a second plane, the third sub-surface entirely in a third plane, and the fourth sub-surface entirely in a fourth plane. The first sub-surface forms the inclined surface of the corresponding back-gripping element. For this purpose, it, or rather the first plane, is angled relative to the normal plane by a specific angle. This angle lies within the range already specified above for the inclined surface.

[0040] The second sub-surface, or second plane, runs parallel to the longitudinal axis and therefore has a slope of zero with respect to it. The third sub-surface, or third plane, is angled relative to the normal plane, but at an angle different from that of the first sub-surface, or first plane. Accordingly, the first and third sub-surfaces, or first and third planes, are angled relative to each other, forming an angle greater than 0° and less than 180°. The fourth sub-surface, or the fourth plane that defines it, is perpendicular to the longitudinal axis.

[0041] The sub-surfaces of each end face can be directly adjacent to one another, but can also be spaced apart longitudinally. For example, in this case, the end faces transition into one another via a curve or curves. The realization of the different sub-surfaces allows for a particularly flexible design of the back-gripping elements.

[0042] A further development of the invention provides that at least one retaining rib is attached to the base plate, which is arranged flush with the rear gripping rib of the first rear gripping element. While the base plate is arranged completely outside the groove and rests on the groove edges, the retaining rib is arranged in the groove and engages under the groove edge. This means that, viewed longitudinally, it is located next to the rear gripping rib of the first rear gripping element and, together with it, engages behind the corresponding groove edge. Preferably, for this purpose, an upper surface of the retaining rib associated with the groove edge is designed to be flush or aligned with an upper surface of the rear gripping rib of the first rear gripping element facing the groove edge. The retaining rib, together with the base plate, defines a groove edge recess into which the groove edge is inserted during assembly.

[0043] Preferably, the retaining web is connected to the base plate via a connecting element, which is arranged in an opening in the base body of the first rear-engaging element. The connecting element extends from the base plate through the opening in the base body and into the groove. There, it engages the retaining web, which ultimately engages under the edge of the groove. The base plate, the connecting element, and the retaining web are preferably manufactured as a single piece from a single material. For example, the base plate, the connecting element, and the retaining web are available as a sheet metal forming part or as a sheet metal stamping part. This allows for simple and cost-effective manufacturing.

[0044] A further development of the invention provides that the base body of the first rear grip element has two mounting projections spaced apart by a recess formed in the base body, against which the base plate rests and is attached. The mounting projections serve to connect the first rear grip element to the base plate. Each of the mounting projections has a flat contact surface on its side facing the base plate, which lies flush against the base body, so that the first rear grip element is arranged on the base plate in a way that prevents it from tipping.

[0045] The recess is formed in the base body in the longitudinal direction between the mounting projections, such that the recess spaces the mounting projections apart longitudinally. The recess extends at least partially, and in particular at least partially completely, through the base body in the vertical direction. The mounting projections ensure high strength of the first rear gripping element and its secure and reliable attachment to the base plate.

[0046] A further development of the invention provides that fastening recesses are formed in the fastening projections, in which fastening elements are arranged that hold the base plate to the first rear grip element. The fastening recesses extend completely through the fastening projections. They are preferably designed as bores. The fastening elements extend at least partially through the fastening recesses, engaging on one side the base plate and on the other side the first rear grip element, in order to fasten the base plate and the first rear grip element to one another. The fastening elements are preferably designed as rivets or screws. It is particularly preferred that a first of the fastening recesses is designed as a round hole and a second of the fastening recesses as an elongated hole.The elongated hole has its greater extent in the longitudinal direction, so that a tolerance compensation is achieved in this direction and accordingly, the attachment of the first rear grip element to the base plate can be carried out extremely quickly and easily.

[0047] A further development of the invention provides that the recess is formed by a tapering of the base body in the vertical direction and / or in longitudinal section, creating an open-edged recess. The recess, which separates the mounting projections from one another and is present in the base body, can be configured in various ways. For example, the recess includes the tapering. This refers to a configuration of the base body such that it has a reduced material thickness between the mounting projections than in the area of ​​the mounting projections. The tapering means that the base body is thinner between the mounting projections than the mounting projections themselves, but the material thickness of the base body is always greater than zero, even between the mounting projections. Accordingly, a continuous connection between the mounting projections is achieved in the area of ​​the tapering.

[0048] Additionally or alternatively, the recess is in the form of an open-edge recess. The open-edge recess extends completely through the base body in the vertical direction, thus partially separating the fastening projections from one another. The recess has, for example, a U-shape. Particularly preferably, the recess is formed partly by the tapered section and partly by the open-edge recess. In this case, the recess borders the tapered section, with the recess being open-edge on its side facing away from the tapered section. This design allows, firstly, a weight- and material-saving implementation of the first rear gripping element. Secondly, it enables particularly flexible use of the fastening device, especially on frames that have an attachment in the area of ​​the groove. In this case, the recess is designed to receive the attachment.For example, a connecting element is used as an attachment component, by means of which the spar, in whose groove the fastening device is arranged, is connected to another spar.

[0049] A further development of the invention provides that the fastening projections are connected to each other via a stiffening web that projects beyond the base body. The stiffening web is thus located between the fastening projections. For example, the stiffening web is formed in the area of ​​the taper of the base body to achieve sufficient stiffness of the first rear grip element. The stiffening web runs continuously and without interruption. It is particularly preferably located directly adjacent to the rear grip web of the first rear grip element.

[0050] A further development of the invention provides that the rear gripping web of the first rear gripping device extends continuously from the base body in the longitudinal direction. The rear gripping web thus runs uninterrupted in the longitudinal direction to achieve reliable rear grip of the groove edge and, at the same time, simple assembly.

[0051] A further development of the invention provides that the open-edged recess overlaps with a closed-edged passage opening in the base plate, wherein a receiving pocket for a fitting glider is formed by the tapering of the base body between the base body and the base plate. The passage opening is formed in the base plate that overlaps the first rear grip element. This passage opening is closed-edged, i.e., it is bounded by a continuous or uninterrupted edge. For example, an edge bounding the open-edged recess and the edge bounding the closed-edged passage opening lie partially in an imaginary plane, i.e., they are aligned with each other. Preferably, this is the case on at least one side of the recess or on several sides of the recess or the passage opening. It has already been mentioned above that the open-edged recess is preferably U-shaped.It is bounded by three edge legs. In particular, two of these edge legs are arranged parallel to each other and are connected to each other by a further edge leg. Preferably, at least one of these edge legs, several of these edge legs, or each of these edge legs is aligned with a region of the edge of the closed passage opening of the base plate.

[0052] In addition to the open-edged recess, the first rear-handling element features a tapered base. The tapered section of the base is positioned vertically between the recess and the through-hole, forming a receiving pocket between the base and the base plate. This receiving pocket opens directly into the open-edged recess of the first rear-handling element, thus bordering it immediately. The receiving pocket serves to accommodate, at least partially, the fitting slider, which, like the fitting itself, is a component of the building locking device. Specifically, the fitting slider is movably positioned within the receiving pocket.

[0053] The fitting slider preferably comprises a fitting slider shaft and a fitting slider head extending from the fitting slider shaft. The fitting slider head has larger dimensions in the radial direction with respect to a longitudinal center axis of the fitting slider shaft than the shaft itself. Preferably, the fitting slider shaft is received in the edge-closed passage opening of the base plate, while the fitting slider head engages in the receiving pocket, particularly with an edge projecting radially beyond the fitting slider shaft. This reliably secures the fitting slider in the axial direction with respect to the longitudinal center axis of the fitting slider shaft. Simultaneously, a sliding guide for the fitting slider is provided.

[0054] A further development of the invention provides that the second rear grip element has a mounting projection on the side facing away from its rear grip rib, in which a screw hole is formed for receiving a clamping screw by means of which the second rear grip element can be screwed to the frame. The clamping screw serves to fasten or secure the second rear grip element to the frame, in particular to the frame rail. For this purpose, the clamping screw passes through the screw hole and also engages in the frame or the rail. After the fastening device has been installed in the groove, the second rear grip element is thus screwed to the frame.

[0055] The screw hole in which the clamping screw is or can be arranged is located in the mounting projection. The mounting projection is located on the side of the second rear grip element facing away from the rear grip web; in particular, the rear grip web and the mounting projection are each arranged, at least partially, on opposite sides of the normal plane. In any case, the mounting projection and the rear grip web extend in opposite directions with respect to the normal plane. For example, after the fastening device is mounted in the groove, the mounting projection rests against the edge of the groove, particularly with its end face facing away from the rear grip web. Preferably, however, it is arranged at a distance from it, for example, parallel to it.The described design ensures reliable locking of the second rear gripping element in the groove and, accordingly, a high strength of the fastening device.

[0056] A further development of the invention provides that a longitudinal center axis of the screw hole is angled with respect to the normal plane in the direction of the longitudinal center axis of the fastening device. The screw hole is inclined, in particular, such that screwing the clamping screw into the frame displaces the second rear grip element longitudinally towards the first rear grip element, thus clamping the second rear grip element relative to the first. During assembly of the fastening device, the second rear grip element is therefore first displaced, for example by hand or with a suitable tool, such as a hammer, as far as possible towards the first rear grip element until the fastening device is already firmly seated in the groove. The second rear grip element is then fastened to the frame using the clamping screw.This shifts the second rear grip element even further towards the first rear grip element, creating a preload that ultimately holds the fastening device permanently and reliably in the groove.

[0057] A further development of the invention provides that a connecting screw is arranged on the first and / or the second rear grip element for securing the two rear grip elements relative to each other. After the two rear grip elements are inserted into the groove, they are fastened together by means of the connecting screw and thus secured against each other. The connecting screw is arranged and aligned in such a way that it prevents the rear grip elements from shifting relative to each other in the longitudinal direction, so that the rear grip ribs cannot detach from the groove edges. The connecting screw can also be angled relative to the clamping screw or the screw hole, in particular with respect to the normal plane in the direction of the longitudinal center axis.In this case, the connecting screw is aligned in such a way that screwing the connecting screw into the rear grip elements displaces them in the axial direction or at least preloads them so that the rear grip webs are reliably held under the groove edges.

[0058] As an alternative to using the connecting screw to fix the two rear grip elements against each other, it can be provided that both the first and the second rear grip elements are each attached to the frame by means of a separate clamping screw. A further alternative, in a particularly preferred and easily implemented embodiment, it can be provided that the first rear grip element is supported longitudinally on the frame in the direction opposite the second rear grip element, most preferably on a further member which is perpendicular to the member in which the groove containing the first rear grip element is formed. This also ensures reliable fixing of the first rear grip element to the frame and thus in the groove.

[0059] A further development of the invention provides that a tapered support projection extends from the mounting projection, which, after proper installation of the mounting device, rests on one of the groove edges and is overlapped with the base plate. The support projection is, for example, an extension of the mounting projection, but is tapered, i.e., it has a reduced material thickness. Preferably, the mounting projection is arranged at least partially within the groove, particularly in the groove's opening. The support projection, on the other hand, is arranged entirely outside the groove. After the mounting device is installed, it completely overlaps one of the groove edges and preferably rests against it in a flat, continuous contact. In particular, the support projection has a lateral extension that corresponds to at least 50%, at least 75%, or at least 90% of the groove edge's width in that direction.For example, the support projection extends as far beyond the groove edge as the base plate, so that a free end of the support projection is flush with or projects beyond an end face of the base plate. Preferably, after assembly, the support projection overlaps the groove edge over a length that is at least 50%, at least 60%, or at least 70% of the length over which the base plate overlaps the groove edge. The support projection supports the second rear grip element laterally, thus reliably preventing the second rear grip element from tilting, particularly during and / or after assembly.

[0060] A further development of the invention provides that a flat underside of the support projection is aligned with a flat underside of the base plate. After the fastening device is mounted in the groove, the support projection, like the base plate, rests on the edge of the groove, namely the support projection with its flat underside and the base plate with its flat underside. Accordingly, the undersides are aligned with each other to ensure continuous, flat contact. This reliably prevents the fastening device from tilting in the groove.

[0061] A further development of the invention provides that a recess extending over the screw hole is formed in the support projection. The screw hole is formed in the mounting projection from which the support projection originates. Here, the support projection overlaps the screw hole. The recess is formed in the support projection and is located above the screw hole, specifically above an opening of the screw hole, which is arranged on the side of the second rear grip element facing away from the rear grip web of the second rear grip element. The recess is, for example, semi-circular in shape. Its depth preferably decreases in the direction away from the mounting projection. The recess serves to accommodate a section of the frame that is plastically deformed by the tightening of the clamping screw.In other words, during the assembly of the fastening device in the groove, the clamping screw is passed through the screw hole and screwed into the frame. This causes the frame to deform plastically in certain areas, so that a portion of the frame—specifically, the plastically deformed part—penetrates the recess. This creates a positive fit, which additionally secures the second rear gripping element to the frame, particularly in the longitudinal direction.

[0062] A further development of the invention provides that the first rear grip element and / or the base plate, on the one hand, and the second rear grip element, on the other, are provided with identical markings that are visible when the fastening device is installed as intended. The markings serve to reliably identify the rear grip elements and the base plate. For example, the markings are selected to indicate different mounting locations of the fastening device on the frame. First markings indicate a first mounting location, and second markings indicate a second mounting location. The markings are positioned so that they are visible after the fastening device is installed in the groove, i.e., visible from the outside of the frame. In particular, the markings are not obscured by the frame but are clearly visible.This ensures easy monitoring of the assembly, as it is easy to determine even after assembly whether the fastening device is positioned in the correct mounting location.

[0063] A further development of the invention provides that the mounting projection has a recess which, after proper installation of the mounting device, is present without a gap between the mounting projection and the base plate. The recess is designed such that, after installation of the mounting device, a disassembly tool can easily be inserted between the mounting projection and the base plate, particularly if the mounting projection and the base plate are in direct contact with each other. Using this disassembly tool, the mounting projection and the base plate, and thus the first and second rear gripping elements, can be moved apart longitudinally. This enables simple and quick disassembly of the mounting device.Naturally, the cutout also facilitates disassembly if the mounting projection and the base plate are spaced apart.

[0064] The invention further relates to a building locking device with a frame and a fitting part attached to the frame by means of a fastening device, in particular by means of a fastening device according to the embodiments within the scope of this description, wherein the fastening device has a first rear gripping element and a second rear gripping element, which are inserted separately into the groove and, when arranged together, are held in the groove in a form-fitting manner by interlocking opposing groove edges that delimit the groove, for this purpose the rear gripping elements have rear gripping webs that run parallel to each other and to a longitudinal center axis of the fastening device and that run continuously parallel to an imaginary longitudinal center plane that accommodates the longitudinal center axis.

[0065] It is provided that the first rear gripping element has a first inclined surface and the second rear gripping element has a second inclined surface for at least partial contact with the first inclined surface, wherein the two inclined surfaces are angled relative to an imaginary normal plane perpendicular to the longitudinal median plane and the two rear gripping elements are designed such that when the rear gripping elements are moved towards each other longitudinally to the longitudinal median axis, the rear gripping elements are pushed apart transversely to the longitudinal median axis.

[0066] The advantages of such a design for the fastening device or the building locking device have already been mentioned. Both the building locking device and the fastening device can be further developed as described in this document, and reference is made to these details.

[0067] Furthermore, a method for attaching a fitting to a frame of a building locking device by means of a fastening device, in particular by means of a fastening device according to the embodiments within the scope of this description, is explained, wherein the fastening device has a first back-engaging element and a second back-engaging element, which are inserted separately into the groove and, when arranged next to each other, are held in the groove in a form-fitting manner by interlocking opposing groove edges that bound the groove, for this purpose the back-engaging elements have back-engaging webs that run parallel to each other and to a longitudinal center axis of the fastening device, which run continuously parallel to an imaginary longitudinal center plane that accommodates the longitudinal center axis.

[0068] It is provided that the first rear gripping element has a first inclined surface and the second rear gripping element has a second inclined surface for at least partial contact with the first inclined surface, and that the two inclined surfaces are angled relative to an imaginary normal plane perpendicular to the longitudinal median plane, wherein the two rear gripping elements are moved towards each other longitudinally to the longitudinal median axis during fastening and are designed in such a way that they are pushed apart when moved transversely to the longitudinal median axis.

[0069] Reference is again made to the explanations within this description regarding the advantages and possible advantageous designs.

[0070] The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. The drawing shows: Fig. 1. A schematic representation of a section of a building locking device with a frame and a fitting attached to the frame by means of a fastening device. Fig. 2 a cross-sectional view through an area of ​​the frame and the fastening device, Fig. 3 a schematic top view of the frame and the fastening device, Fig. 4 a schematic representation of the fitting part and the fastening device, Fig. 5 a schematic representation of a first rear gripping element of the fastening device with a base plate attached to it, Fig. 6 a schematic representation of the first rear grip element, Fig. 7 a schematic representation of a second rear gripping element of the fastening device, as well as Fig. 8 Another schematic representation of the second rear grip element in a different view.

[0071] The Fig. Figure 1 shows a schematic representation of a section of a building locking device 1, which in the illustrated embodiment is designed as a window. The building locking device 1 has a frame 2, which here is a fixed frame. A sash frame (not shown) is rotatably mounted on the frame 2 by means of a pivot bearing 3. The pivot bearing 3 is a fitting 4, which is attached to the frame 2 by means of a fastening device 5. The fastening device 5 engages in a groove 6, which is formed on the frame 2, more precisely on a mullion 7 of the frame 2.

[0072] The fitting 4 is attached in a corner area where the stile 7 is fastened to another stile 8, for example, via a miter joint. Preferably, it is supported in this case by the stile 8 in one direction and is fixed accordingly in this direction. The stiles 7 and 8, or rather a longitudinal center axis of the stile 7 and a longitudinal center axis of the stile 8, are preferably perpendicular or approximately perpendicular to each other. However, angles other than 90° between the stiles 7 and 8 or their longitudinal center axes are also possible. The frame 2, or the stiles 7 and 8, are preferably made of aluminum, at least in part. Alternatively, they can be made of plastic.

[0073] The fastening device,5 comprises as essential elements a first rear gripping element 9 and a second rear gripping element 10. These can be inserted separately into the groove 6, as shown here. If, however, the rear gripping elements 9 and 10 are moved towards each other in the direction of a longitudinal center axis 11 of the groove and are brought into at least partial overlap, they are positively locked in the groove 6, namely by engaging groove edges 12 and 13, which delimit the groove 6 and, in particular, accommodate an opening 14 between them, through which the rear gripping elements 9 and 10 are inserted into the groove 6.

[0074] The Fig. Figure 2 shows a schematic cross-sectional view through a section of the frame 2 and the fastening device 5. It can be seen that the groove 6 is designed as a T-slot. It has a cavity 15 to which the opening 14 is connected. As already explained, the opening 14 is bounded by the groove edges 12 and 13 in a transverse direction that is perpendicular to the longitudinal center axis 11 and preferably runs parallel to a base 16 of the groove 6. Such a groove 6 is sometimes also referred to as a C-slot. It can be seen that the rear-engaging elements 9 and 10 each have a rear-engaging web 17 and 18, respectively, which engage the groove edges 12 and 13 in a form-fitting manner and thus hold the fastening device 5 in the groove 6. The rear-engaging webs 17 and 18 extend parallel to a longitudinal center plane 19 of the fastening device 5, which incorporates a longitudinal center axis 20 of the fastening device 5. According to the arrangement of the fastening device 5 in the groove 6, the longitudinal center plane 19 preferably runs parallel to, or at least nearly parallel to, the groove bottom 16. The longitudinal center plane 19 is thus spanned in the longitudinal and transverse directions of the fastening device 5.

[0075] In addition to the rear gripping elements 9 and 10, the fastening device 5 has a base plate 21 which is firmly connected to the first rear gripping element 9, in particular by means of a fastening element not shown here, for example a rivet or a screw, for the receipt of which the first rear gripping element 9 has at least one fastening recess 22. The second rear gripping element 10, on the other hand, is preferably only indirectly connected to the base plate 21, in particular via the first rear gripping element 9 and / or the frame 2. The base plate 21 has transverse dimensions such that it completely overlaps the opening 14 and rests on the groove edges 12 and 13 on both sides of the opening 14. In the embodiment shown here, it completely overlaps the groove 6 in the transverse direction, and thus has larger dimensions in this direction than the groove 6, in particular than the cavity 15.By resting the base plate 21 on the groove edges 12 and 13, tilting of the first rear grip element 9 is reliably prevented, thus ensuring easy assembly of the fastening device 5.

[0076] The two rear gripping elements 9 and 10 have a first positive locking device 23 and a second positive locking device 24. These interact positively to hold the rear gripping elements 9 and 10 together in a vertical direction perpendicular to the longitudinal center plane 19 and in a normal plane 25, respectively. The normal plane is perpendicular to the longitudinal center plane 19 and incorporates the longitudinal center axis 20 or at least runs parallel to it.

[0077] The first positive locking device 23 has a positive locking web 26 extending from a base body 27 of the first rear gripping element 9 and extending towards the second rear gripping element 10. The second rear gripping element 10, in turn, has a positive locking web 28 extending from a base body 29 of the second rear gripping element 10 and extending towards the first rear gripping element 9. The positive locking web 26, together with the base plate 21, defines a positive locking recess 30 into which the positive locking web 28 engages positively, so that it is positively locked in the vertical direction between the positive locking web 26 and the base plate 21. Accordingly, the rear gripping elements 9 and 10 are fastened to one another in the vertical direction by means of the positive locking devices 23 and 24.

[0078] The Fig. Figure 3 shows a schematic top view of the frame 2 and the fastening device 5. It can be seen that the first rear gripping element 9 has a first inclined surface 31 and the second rear gripping element 10 has a second inclined surface 32. These inclined surfaces 31 and 32 are designed to force the rear gripping elements 9 and 10 apart transversely to the longitudinal center axis 20 when they are moved longitudinally towards each other, and consequently under the groove edges 12 and 13. This ensures reliable fastening of the fastening device 5 in the groove 6. In the embodiment of the fastening device 5 described here, the first rear gripping element 9 is supported longitudinally against the beam 8, thus securing it in this direction.The second rear grip element 10, on the other hand, is fastened by means of a clamping screw 33, which is arranged in a screw hole 34 of the second rear grip element 9 and engages in the frame 2 or the spar 7.

[0079] The Fig. Figure 4 shows a schematic representation of the fitting 4 and the fastening device 5 away from the frame 2. Fastening elements 35 are visible; in the embodiment shown here, these are rivets arranged in the fastening recesses 22 and connecting the first rear grip element 9 to the base plate 21. At least one retaining web 36 is attached to the base plate 21, in the embodiment shown here via a connecting element 37. In the illustrated embodiment, two such retaining webs 36 are attached to the base plate 21, namely on longitudinally opposite sides of the first rear grip element 9.

[0080] Here, one of the retaining webs 36 overlaps the first rear gripping element 9 in the longitudinal direction, while another retaining web 36 is spaced longitudinally from the first rear gripping element 9. The first retaining web 36, or its connecting element 37, engages in or extends through an opening 38 of the first rear gripping element 9. This results in the retaining web 36(s) being aligned with the rear gripping web 17. Like the rear gripping web 17, the retaining web 36(s) extend parallel to the longitudinal center axis and run parallel to the longitudinal center plane 19.

[0081] A recess 39 is formed in the first rear grip element 9, or rather in its base body 27. This recess separates two fastening projections 40 and 41, by means of which the first rear grip element 9 is attached to the base plate 21. The recess 39 is formed on the one hand by a tapering 42 of the base body 27 in the vertical direction (not visible here) and additionally by a recess 43 formed without a rim in the first rear grip element 9. The tapering 42 forms a receiving pocket 44 between the base body 27 and the base plate 21, into which a fitting glider 45 can be inserted. The fitting glider 45 has a fitting glider shaft (not visible here) and a fitting glider head 46.

[0082] The fitting glider head 46 has a rim projecting radially beyond the fitting glider shaft with respect to a longitudinal center axis of the fitting glider shaft. This rim engages—for example, in a form-fitting manner—in the receiving pocket 44, thus securing the fitting glider 45 therein. Preferably, the fitting glider head 46 is spaced apart from the first rear gripping element 9, the base plate 21, or both, resulting in low friction and correspondingly low wear. The fitting glider 45 is preferably rigidly attached to a fitting element 47, which is part of the pivot bearing 3 and pivotable about an axis of rotation relative to the fastening device 5. The fitting element 47 is located on the side of the base plate 21 facing away from the fitting glider head 46.

[0083] The Fig. Figure 5 shows a schematic representation of the first rear grip element 9 of the fastening device 5 with the base plate 21 attached to it. It can be seen that the recess 43 of the first rear grip element 9, or its base body 27, is in overlap with a closed-edge through-opening 48 of the base plate 21. The through-opening 48 serves to support the fitting slide shaft, in particular to provide linear guidance for the fitting slide shaft. Furthermore, it can be seen that the inclined surface 31 is formed on the positive-locking web 26.

[0084] The first rear gripping element 9, or its positive locking web 26, has an end face 49. In the embodiment shown here, this is composed of several partial surfaces 50, 51, 52, 53, 54, 55, 56 and 57, which follow one another in the longitudinal direction.

[0085] Here, sub-surfaces 50 and 56 are the first sub-surfaces, angled at a specific angle to the normal plane 25. Sub-surfaces 52 and 55, on the other hand, are the second sub-surfaces, running parallel to the longitudinal center axis 20. Sub-surfaces 54 and 57 represent the third sub-surfaces, angled at an angle to the normal plane 25 that differs from the specific angle of the first sub-surfaces 50 and 56. Sub-surfaces 51 and 53 represent the fourth sub-surfaces, oriented perpendicular to the longitudinal center axis 20. Sub-surfaces 50 and 56 constitute the actual first inclined surface 31. Sub-surfaces 54 and 57 facilitate the engagement of the two rear gripping elements 9 and 10.

[0086] The Fig. Figure 6 shows a schematic representation of the first rear grip element 9 in an alternative view. The fastening projections 40 and 41 are visible. These are connected to each other by a stiffening web 58' ​​projecting beyond the base body 27. It is clear that, in addition to the first inclined surface 31, there is another inclined surface 58, namely parallel to and offset from the first inclined surface 31. This inclined surface 58 can be formed by an end face of the first rear grip element 9, which is not further specified. This end face can also be composed of several sub-surfaces, with only one or more of these sub-surfaces forming the inclined surface 58.

[0087] The Fig. Figure 7 shows a schematic representation of the second rear grip element 10 of the fastening device 5. The rear grip web 18 of the second rear grip element 9 has a radius 59, through which it transitions into the base body 29. Such a radius 59 can also be present on the positive locking web 26 of the first positive locking device 23. The second grip element 10 has a fastening projection 60 on its side facing away from the rear grip web 18, in which the screw hole 34 is formed. The clamping screw 33 is also visible. A tapered support projection 61 extends from the fastening projection 60. This is designed and configured to engage at least part of the groove edge 13.

[0088] The Fig.Figure 8 shows a further schematic representation of the second rear grip element 10 in a different view. The support projection 61 has a flat underside 62 for bearing against the groove edge 13. The underside 62 is penetrated by a recess 63, which overlaps the screw hole 34. The recess 63 has a decreasing depth in the direction away from the mounting projection 60, so that its greatest depth is located directly adjacent to the mounting projection 60. The recess 63 serves for the positive locking of plastically deformed material of the frame 2 when the clamping screw 33 is screwed into the frame 2. For example, the mounting projection 60 is designed such that a side surface 64, which is penetrated by the screw hole 34, bears against the groove edge 13 after the mounting device 5 is installed in the groove 6, namely within the openings 14.However, a design is preferably implemented such that the side surface 64 is spaced away from the groove edge 13 after the fastening device 5 has been mounted in the groove 6.

[0089] Analogous to the design of the first rear gripping element 9, the second rear gripping element 10 has its inclined surface 32 on an end face 65. This surface can also be subdivided into several partial surfaces, analogous to the embodiments of the first rear gripping element 9, which will not be discussed in detail here. A particularly preferred embodiment is one in which the inclined surfaces 31 and 32 of the two rear gripping elements 9 and 10 are tilted with respect to the normal plane 25 and the vertical direction, respectively, such that a transverse displacement of the rear gripping elements 9 and 10 towards each other generates a force in the vertical direction. This results in an additional frictional force that reliably holds the rear gripping elements 9 and 10 together and thus ensures the secure fastening of the fastening device 5 in the groove 6.All in all, the fastening device 5 described here, or the building locking device 1 described here, enables particularly simple and quick mounting of the fitting 4 to the frame 2, while also ensuring a particularly long service life. REFERENCE MARK LIST 1 Building locking device 2 frames 3 Rotary bearing 4 Fitting part 5 Fastening device 6 Nut 7 Holm 8 Holm 9 1. Back grip element 10 2. Hmtergnffselement 11 Longitudinal center axis 12 Grooved edge 13 Groove edge 14 Mouth opening 15 Cavity 16 Groove 17 Backhand bridge 18 Backhand bridge 19 Longitudinal median plane 20 Longitudinal center axis 21 Base plate 22 Mounting recess 23 1. Positive locking device 24 2. Positive locking device 25 Normal plane 26 Form-fitting bridge 27 Basic shapes 28 Form-fitting bridge 29 Basic bodies 30 Form-fitting recess 31 1: Sloping surface 32 2. Inclined surface 33 Tensioning screw 34 screw holes 35 fasteners 36 landing stage 37 Connecting element 38 Opening 39 recess 40 Mounting projection 41 Mounting projection 42 Rejuvenation 43 Exclusion 44 recording bag 45 fitting gliders 46 Fitting glide head 47 Fitting element 48 Passage opening 49 Front surface 50 partial area 51 partial area 52 partial area 53 partial area 54 partial area 55 partial area 56 partial area 57 sub-area 58 inclined surface 58' stiffening bridge 59 rounding 60 Mounting projection 61% circulation lead 62 Underside 63 In-depth study 64 side surface 65 Front surface

Claims

Fastening device (5) for fastening a fitting part (4) to a frame (2) of a building locking device (1) having a groove (6), comprising a first rear gripping element (9) and a second rear gripping element (10), which can be inserted separately into the groove (6) and, when arranged together, are held in the groove (6) by interlocking opposite groove edges (12, 13) that define the groove (6) in a form-fitting manner. are, for which the rear gripping elements (9, 10) have rear gripping webs (17, 18) running parallel to each other and to a longitudinal central axis (20) of the fastening device (5), which run continuously parallel to an imaginary longitudinal central plane (19) receiving the longitudinal central axis (20), wherein the first rear gripping element (9) has a first inclined surface (31) and the second rear gripping element (10) has a second inclined surface (32) for at least partial contact with the first inclined surface (31), wherein the two inclined surfaces (31,32) are angled relative to an imaginary normal plane (25) perpendicular to the longitudinal median plane (19), characterized in that the two rear gripping elements (9, 10) are designed such that when the rear gripping elements (9, 10) are displaced longitudinally towards each other along the longitudinal median axis (20), the rear gripping elements (9, 10) are forced apart transversely to the longitudinal median axis (20), wherein the first rear gripping element (9) is directly and the second rear gripping element (10) is only indirectly attached to a base plate (21), which has larger dimensions in the transverse direction than the rear gripping elements (9, 10) abutting each other via the inclined surfaces (31, 32) in order to engage the groove (6) and to bear on the groove edges (12, 13). Fastening device according to claim 1, characterized in that the first rear gripping element (9) has a first positive locking device (23) and the second rear gripping element (10) has a second positive locking device (24) which interacts positively with the first positive locking device (23) and which holds the rear gripping elements (9, 10) together in a vertical direction perpendicular to the longitudinal median plane (19). Fastening device according to claim 2, characterized in that each of the positive locking devices (23, 24) has a positive locking web (26, 28) extending from a base body (27, 29) of the respective rear gripping element (9, 10), wherein the positive locking webs (26, 28) of the positive locking devices (23, 24) are at least temporarily in contact with each other in an imaginary plane. Fastening device according to claim 3, characterized in that the positive locking web (26) of the first positive locking device (23) together with the base plate (21) defines a positive locking recess (30) into which the positive locking web (28) of the second positive locking device (24) engages in a positive locking manner to hold the rear gripping elements (9, 10) together in the vertical direction. Fastening device according to one of the preceding claims, characterized in that each of the rear gripping elements (9, 10) has an end face (49, 65) and a planar first partial surface (50, 56) forms the respective inclined surface (31, 32) which is angled at a certain angle to the normal plane (25), wherein at least one planar second partial surface (52, 55) of at least one of the end faces (49, 65) runs parallel to the longitudinal central axis (20) and / or a planar third partial surface (54, 57) of at least one of the end faces (49, 65) is angled at an angle to the normal plane (25) other than the certain angle and / or a planar fourth partial surface (51, 53) of at least one of the end faces (49, 65) is oriented perpendicular to the longitudinal central axis (20). Fastening device according to one of the preceding claims, characterized in that at least one retaining web (36) is attached to the base plate (21), which is arranged flush with the rear gripping web (17) of the first rear gripping element (9). Fastening device according to one of the preceding claims, characterized in that the base body (27) of the first rear grip element (9) has two fastening projections (40, 41) spaced apart from a recess (39) formed in the base body (27), against which the base plate (21) rests and is fastened. Fastening device according to claim 7, characterized in that the recess (39) is formed by a tapering (42) of the base body (27) in the vertical direction and / or in longitudinal section as a recess open at the edge (43). Fastening device according to claim 8, characterized in that the edge-open recess (43) is in overlap with an edge-closed passage opening (48) of the base plate (21), wherein a receiving pocket (44) for receiving a fitting glider (45) is formed by the tapering of the base body (27) between the base body (27) and the base plate (21). Fastening device according to one of the preceding claims, characterized in that the second rear grip element (10) has a fastening projection (60) on the side facing away from its rear grip web (18), in which a screw hole (34) is formed for receiving a clamping screw (33), by means of which the second rear grip element (10) can be screwed to the frame (2). Fastening device according to claim 10, characterized in that a longitudinal center axis of the screw hole (34) is angled with respect to the normal plane (25) in the direction of the longitudinal center axis (20) of the fastening device (5). Fastening device according to claim 10 or 11, characterized in that a tapered support projection (61) extends from the fastening projection (60), which, after proper assembly of the fastening device (5), is in contact with the base plate (21) to rest on one of the groove edges (12, 13). Building locking device (1) with a frame (2) and a fitting part (4) attached to the frame (2) by means of a fastening device (5) according to one or more of the preceding claims.

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