Holding device for releasably fixing a functional element to a surface

Abstract

Holding device (1) for releasably securing a functional element (7) to a surface (3) with a coupling element (6), wherein the functional element (7) can be secured to an end (5) of the coupling element (6) facing away from the surface (3), and with an anchoring sleeve (9) connected to the coupling element (6), wherein the coupling element (6) and the anchoring sleeve (9) are arranged along a common longitudinal axis (8), and wherein an end of the coupling element (6) facing the surface (3) is rotatably secured to one another about the longitudinal axis (8) with an end of the anchoring sleeve (9) facing away from the surface (3), wherein the holding device (1) is placed as intended against the surface (3) with a contact surface (2) formed on the anchoring sleeve (9) and facing the surface (3), and is secured to the surface (3) with a tightening bolt (11) projecting into a recess (14) in the surface (3). can be determined,wherein the pull-in bolt (11) is mounted in the anchoring sleeve (9) in a rotationally fixed manner with the anchoring sleeve (9) and has a bolt threaded portion (12) facing the surface (3), which can be brought into engagement with a corresponding surface threaded portion (13) of the recess (14) arranged in the surface (3), characterized in that the pull-in bolt (11) can be brought into engagement with a coupling threaded portion (15) with a bearing threaded portion (17) arranged on a bolt bearing element (18), wherein the bolt bearing element (18) is arranged in a sleeve-shaped portion (10) of the coupling element (6) in a rotationally fixed manner with the coupling element (6), which is rotatable about the longitudinal axis (8) relative to the anchoring sleeve (9) and is non-displaceable along the longitudinal axis (8),so that the coupling threaded portion (15) of the tightening bolt (11) can be rotated relative to the bearing threaded portion (17) by rotating the anchoring sleeve (9) about the longitudinal axis (8) and can thereby be displaced along the longitudinal axis (8).

Description

[0001] The invention relates to a holding device for releasably securing a functional element to a surface with a coupling element, wherein the functional element can be secured to an end of the coupling element facing away from the surface, and with an anchoring sleeve connected to the coupling element, wherein the coupling element and the anchoring sleeve are arranged along a common longitudinal axis and wherein an end of the coupling element facing the surface is rotatably secured to one another about the longitudinal axis with an end of the anchoring sleeve facing away from the surface, wherein the holding device can be applied to the surface as intended with a contact surface formed on the anchoring sleeve and facing the surface and can be secured to the surface with a tightening bolt projecting into a recess in the surface,wherein the tightening bolt is mounted in the anchoring sleeve in a rotationally fixed manner with the anchoring sleeve and has a bolt threaded portion facing the surface, which can be brought into engagement with a corresponding surface threaded portion of the recess arranged in the surface.

[0002] Supporting devices are known in practice that allow, for example, handrails to be mounted along the surface of a wall. In this case, the anchoring device must be securely and stably anchored to the wall surface so that a handrail connected to the support device can reliably support the weight of a person leaning against it, for example, when climbing stairs.

[0003] Typically, these handrails are screwed or glued directly to the wall using a holding device. Alternatively, simple holding devices are also known in practice, but these can be individually screwed or glued to the surface of the wall, whereby a handrail can then be attached to the holding devices as intended. However, the appearance and aesthetics of such holding devices suffer. This is especially true because the installed holding devices often differ in style from the handrails and stand out visually. Even more disadvantageous than the visual aspects is the fact that in practice the handrail often has to be attached to the holding devices using so-called grub screws. For example, a threaded bolt attached to the handrail is inserted into the holding device and the handrail orThe threaded bolt is secured with a grub screw through an opening in the holding device. The stability requirements for handrails are high in practice, so fastening them with grub screws is usually barely sufficient to support a person leaning on the handrail with their full weight. Alternative screw connections are also problematic, as all screws and screw openings on the handrail can have burrs and edges that could injure a person leaning on the handrail.

[0004] From the document EP 2 239 471 B1, a holding device is known which is visually more integrated into the handrail. On the one hand, the document describes a coupling element to which a handrail can be attached, and on the other hand, the described holding device can be fastened to the surface of a wall by means of an anchoring element and a tension bolt. Special features when installing the holding device are not addressed in the document. Firstly, all tension bolts must be positioned relatively precisely along the surface of the wall, which can be difficult under certain circumstances given the drilling and installation tolerances that normally occur. Secondly, installation problems can arise at the corners of walls if the distances between the installed holding devices are relatively small, thus making installation considerably more difficult.

[0005] It is therefore an object of the invention to provide a holding device with which it is possible, among other things, to attach handrails detachably, stably and easily to a surface that is at least partially flat.

[0006] The object is achieved according to the invention in that the pull stud can be brought into engagement with a coupling threaded portion with a bearing threaded portion arranged on a stud bearing element, wherein the stud bearing element is arranged in a sleeve-shaped portion of the coupling element with the coupling element rotatable about the longitudinal axis to the anchoring sleeve in a rotationally fixed manner and non-displaceable along the longitudinal axis, so that the coupling threaded portion of the pull stud can be rotated by rotating the anchoring sleeve about the longitudinal axis relative to the bearing threaded portion and can thereby be displaced along the longitudinal axis.

[0007] The coupling element and the anchoring sleeve can be secured to each other in a form-fitting manner, for example, using a formed material collar, while still allowing both to rotate relative to each other about their longitudinal axis. As the anchoring sleeve rotates, with the coupling element remaining rotationally fixed to the surface and coupling any handrail, the pull stud also rotates about the longitudinal axis of the coupling element, the anchoring sleeve, and the pull stud. Depending on the direction of rotation, the coupling threaded section with the pull stud can be rotated into or out of the bearing threaded section of the bolt bearing element, and the pull stud can thus be linearly displaced from or into the sleeve-shaped section of the coupling element, or the anchoring sleeve, along the longitudinal axis.

[0008] If the pull stud is fully retracted, so that the pull stud no longer protrudes beyond the contact surface of the anchoring sleeve, the holding device according to the invention can be leaned against the surface of the wall – directly aligned with the recess. This allows the holding device to be positioned precisely over the recess. As the anchoring sleeve is rotated, the pull stud moves slowly and as intended towards the recess until the bolt threaded section can engage with the surface threaded section of the recess. Further rotation of the anchoring sleeve securely and force-fits the holding device to the surface. Once the holding device is securely attached to the surface, a handrail, for example, can be easily and conveniently mounted. However, the holding device according to the invention is not only suitable for handrails.It is conceivable to mount any functional element that is to be mounted on a surface, whereby the corresponding functional element can be coupled to the holding device and thus to the surface via the coupling element.

[0009] The linearly displaceable or retractable or extendable pull stud according to the invention is particularly advantageous during installation because, for example, in the case of a non-displaceable pull stud, the handrail already mounted on the previous holding device would first have to be bent away from the surface of the wall towards the room or downwards or upwards before the current holding device could be attached to the surface. This could quickly bend or damage a handrail. The same applies to wall corners where the surfaces of two wall sections meet and, for stability reasons, a holding device must be attached to each surface a short distance from each other. In these corner areas, a handrail is also naturally curved, which makes bending the handrail away for installation considerably more difficult.Even the direct installation of a handrail corner piece is not without its problems, as the retaining devices would have to be aligned and installed with even greater precision. However, the linearly adjustable pull stud allows the retaining devices to be positioned flush with the handrail on the wall surface. Once the retaining devices have been satisfactorily positioned, all that remains is to turn the anchoring sleeve, allowing the pull stud to rotate into the surface threaded portion of the recess, friction-locking the retaining device and handrail to the surface. A retaining device according to the invention can also be installed one-handed, allowing one installer to hold the handrail firmly with their free hand. This significantly reduces the number of installers required, allowing one installer to complete the handrail installation alone.

[0010] For an even more advantageous assembly of the holding device according to the invention, according to an optional embodiment of the invention, it can be provided that the pull stud has a star-shaped holding element around a shaft arranged between the coupling threaded section and the bolt threaded section of the pull stud, wherein the star-shaped holding element with its formations projecting radially from the pull stud can engage in corresponding grooves of the anchoring sleeve, so that a rotation of the anchoring sleeve causes a rotation of the threaded bolt in the same direction, and wherein the bolt bearing element arranged in the sleeve-shaped section of the coupling element can be displaced in the radial direction at the same time in order to be able to compensate for a lateral offset between the pull stud and the recess in the surface.

[0011] The star-shaped retaining element can also comprise differently designed formations, as long as more than two formations projecting radially from the pull stud can engage in the corresponding grooves of the anchoring sleeve when the threaded bolt is radially spaced, thus mounting the pull stud in a rotationally fixed manner to the anchoring sleeve. Furthermore, the diameter of the star-shaped retaining element with its formations does not have to exactly correspond to the diameter of the corresponding grooves in the anchoring sleeve. It is also possible for the diameter of the star-shaped retaining element to be slightly smaller, so that the pull stud with the star-shaped retaining element has radial play in the anchoring sleeve. According to the design, the pull stud is radially movable and can compensate for any positional tolerances of the recesses that occur when compared to a normal handrail path along the surface.A specific embodiment of the holding device according to the invention can compensate for a drilling misalignment of up to 10 mm with the radially movable pull stud, which can significantly reduce the required assembly time, as less effort is required for precisely positioned drill holes or recesses. It is precisely the radial play of the pull stud that leads to considerable time savings during assembly.

[0012] Although other designs of a holding device are known in practice that can compensate for offset compensation of the recesses, these designs, already known in practice, in which the coupling element and the anchoring sleeve can be displaced relative to one another along a plane running diagonally to the longitudinal axis, have the significant disadvantage that the diagonal displacement inevitably creates open edges that must be laboriously ground down after assembly and adjustment of the holding device because of the potential risk of injury from the open edges. According to the design according to the invention, however, only the pull stud has radial play, which, once the holding device has been successfully assembled, is no longer subsequently accessible from outside the holding device.

[0013] According to a particularly advantageous embodiment of the holding device according to the invention, it can be provided that a holding element diameter of the star-shaped holding element is larger than a diameter of an anchoring sleeve opening of the anchoring sleeve, so that the star-shaped holding element cannot be displaced longitudinally out of the anchoring sleeve. This embodiment is particularly advantageous from a structural point of view. Alternatively, an inner nut or washer can narrow the anchoring sleeve opening so that during an early production phase of the holding device according to the invention, the star-shaped holding element still fits through the anchoring sleeve opening and can be arranged in the anchoring sleeve, and in a later production phase, the anchoring sleeve opening is narrowed so that the star-shaped holding element is arranged in the anchoring sleeve in a positionally stable manner and is non-rotatable relative to the anchoring sleeve.

[0014] To prevent the pull stud and / or the stud bearing element from falling out of the sleeves, a particularly advantageous embodiment of the holding device according to the invention can provide for a diameter of the stud bearing element to be larger than a coupling sleeve opening, so that the stud bearing element cannot be completely displaced from the coupling sleeve opening of the coupling element. The diameter of the stud bearing element, which can be secured to the pull stud via the coupling threaded portion and the bearing threaded portion, should be larger than the diameter of the coupling sleeve opening. According to this embodiment, neither the pull stud nor the stud bearing element can fall out of the sleeves when the coupling threaded portion and the bearing threaded portion are engaged. The stud bearing element can also be hexagonal, square, rectangular, or even triangular, for example, so that it does not fit through the coupling sleeve opening.Optionally, a driving surface on the bolt bearing element of any design is sufficient, which abuts against an edge of the coupling sleeve opening as soon as the bolt bearing element is displaced along the longitudinal axis, and thereby also prevents the bolt bearing element from completely leaving the sleeve-shaped section of the coupling element.

[0015] According to one embodiment of the holding device according to the invention, it can be advantageously provided that the coupling threaded section of the pull stud consists of a threaded element that is fixed to the pull stud. The pull stud can then consist only of the stud threaded section and a remaining shaft without a threaded section or coupling threaded section applied to the pull stud, while the threaded element is screwed tightly to one end of the shaft. The threaded element can also be screwed into the bearing threaded section of the stud bearing element early on during the production of the holding element according to the invention, so that subsequently only the shaft of the pull stud needs to be screwed to the threaded element located in the bearing threaded section, wherein the shaft extends through a coupling sleeve opening to the threaded element in the stud bearing element.The holding device according to the invention results in production advantages.

[0016] According to a particularly structurally advantageous embodiment of the holding device according to the invention, it can be provided that a diameter of the threaded element is larger than a diameter of a bolt bearing element opening of the bolt bearing element through which the pull stud is guided, so that the pull stud is retained in the sleeve-shaped section of the coupling element by the threaded element and the bolt bearing element, which cannot be displaced along the longitudinal axis. According to this embodiment, the threaded element and bolt bearing element can be used structurally advantageously to hold the pull stud in the sleeves, even if the coupling threaded section and the bearing threaded section no longer engage due to excessive rotation of the anchoring sleeve and the pull stud lies loosely in the sleeve-shaped section of the coupling element and the anchoring sleeve.

[0017] To protect the surface and simplify assembly, an advantageous embodiment of the holding device according to the invention can provide that the contact surface of the anchoring sleeve has a sliding ring element so that the anchoring sleeve can continue to be rotated with appropriate force as it is increasingly fixed to the surface by increasing tensile force of the tightening bolt. Since the contact surface of the anchoring sleeve lies directly against the surface and the anchoring sleeve must be rotated for assembly until the holding device according to the invention is firmly fixed to the surface, this embodiment requires a sliding ring element which, through its material selection, enables easier rotation of the anchoring sleeve relative to the surface when the holding device according to the invention is already fixed to the surface with considerable force.The sliding ring element can then be made of plastic or a rubber material, for example.

[0018] Below are exemplary schematic representations of the holding device according to the invention and its key components. They show: Fig. 1 a design of a holding device for receiving a handrail in cross-sectional view with a retracted tightening bolt, Fig. 2 a design of a holding device for receiving a handrail in cross-sectional view with an extended tightening bolt, Fig. 3 shows an embodiment of a star-shaped holding element of a holding device in a longitudinal axis view and Fig. 4 a design of a bolt bearing element of a holding device in cross-sectional view, Fig. 5 a holding device with handrail and with fully extended tightening bolts before mounting the handrail in a corner of a wall, Fig. 6 a holding device with handrail and with fully extended tightening bolts after installation of the handrail in a corner of a wall.

[0019] In the Fig. 1 and the Fig. 2 shows a holding device 1 which can be secured to a surface 3 of a wall 4 by means of a contact surface 2, while a handrail 7 can be fastened to an end 5 of a coupling element 6 of the holding device 1 facing away from the surface 3, in accordance with a proper use of the holding device 1. In addition to the coupling element 6, the holding device 1 comprises an anchoring sleeve 9 arranged along a longitudinal axis 8 of the coupling element 5. The coupling element 6 is connected to an end of the coupling element 6 facing the surface 3 with an end of the anchoring sleeve 9 facing away from the surface 3.

[0020] A pull stud 11 extends at least partially through the anchoring sleeve 9 and a sleeve-shaped section 10 of the coupling element 6. The pull stud 11 has a bolt thread section 12 facing the surface 3, which can be engaged with a surface thread section 13 of a recess 14 of the surface 3 in the wall 4, so that the holding device 1 can be non-positively secured to the surface 3 of the wall 4. If the pull stud 11, which is mounted in a rotationally fixed manner to the anchoring sleeve 9, is also set in rotation with a rotation of the anchoring sleeve 9, a coupling thread section 15 on a threaded element 16 fixed to the pull stud 11, which can be engaged with a bearing thread section 17 of a bolt bearing element 18, causes a displacement of the pull stud 11 along the longitudinal axis 8.

[0021] The pull stud 11 is mounted in a rotationally fixed manner on the anchoring sleeve 9 by means of a star-shaped retaining element 19, wherein the star-shaped retaining element 19, with its projections 20 projecting radially to the longitudinal axis 8, engages or can engage in corresponding grooves of the anchoring sleeve 9. If the anchoring sleeve 9 - and thus also the pull stud 11 - is rotated about the longitudinal axis 8, the pull stud 11 is linearly displaced by the coupling threaded section 15 and the bearing threaded section 17, wherein the pull stud 7 rotates around the longitudinal axis 8 and moves out of the anchoring sleeve 9 and can engage in the corresponding surface threaded section in the recess 14 of the wall 4. A smaller diameter of the star-shaped retaining element 19 with its radially projecting formations 20 than a diameter of an anchoring sleeve opening 21 ensures a small radial play of the tightening bolt 11.According to the invention, the holding device 1 can be positioned directly with its contact surface 2 on the surface 3 and fixed in a force-fitting manner without mounting elements disturbing, hindering or complicating the intended arrangement of the holding device 1 during assembly.

[0022] In the sleeve-shaped portion 10 of the coupling element 6, the pull stud 11 is prevented from falling out of the sleeves 10, 9 by the stud bearing element 18, wherein a diameter of the stud bearing element 18 is larger than a coupling sleeve opening 22 through which the pull stud 11 projects into the sleeve-shaped portion 10 of the coupling element 6.

[0023] At the corresponding end of the pull stud 11, the coupling threaded portion 15 is arranged in the form of a threaded element 16, wherein the coupling threaded portion 15 can engage with the bearing threaded portion 17 mounted on the stud bearing element 18. A diameter of the threaded element 16 is larger than a stud bearing element opening 23 of the stud bearing element 18, so that the pull stud 11 cannot be completely displaced from the stud bearing element 18 or the coupling element 6.

[0024] The Fig. Figure 2 shows the retaining device 1 in a state according to the invention, wherein the tightening bolt 11 is extended along the longitudinal axis 8 and engages with the bolt threaded portion 12 in the corresponding surface threaded portion 13 in the recess 14 of the wall 4. Furthermore, it is shown how the threaded element 16 holds the tightening bolt 11 in the bolt bearing element 13, since a diameter of the threaded element 16 is larger than the bolt bearing element opening 23.

[0025] In the Fig. 3, the star-shaped holding element 19 is shown again separately in a profile view.

[0026] In the center, a hexagonal opening is shown for a shank 25 of the pull stud 11, through which the pull stud 11 is inserted. The formations 20 projecting radially from the longitudinal axis 8 form the star shape, although a restriction to a star shape is not necessary. Rather, the holding element 19 only needs to have radially projecting formations 20 such that the holding element 19 can engage in corresponding grooves in the anchoring sleeve 9. The engagement of the radially projecting formations 20 in the corresponding grooves of the anchoring sleeve 9 and the hexagonal opening in the center of the star-shaped holding element 19 cause a rotation of the anchoring sleeve 9 to directly result in a rotation of the pull stud 11, and the pull stud 11 is thus mounted in a rotationally fixed manner with the anchoring sleeve 9.

[0027] In the Fig. 4, the bolt bearing element 18 is shown separately again, with the pull stud 11 being guided centrally through the bolt bearing element 18 along the longitudinal axis 8 until the threaded bearing section 17 can engage the coupling threaded section 15. Rotation of the anchoring sleeve 9 and thus of the rotationally fixed pull stud 11 causes a linear displacement of the pull stud 11 along the longitudinal axis 8 by means of the threaded sections - coupling threaded section 15 and bearing threaded section 17. Furthermore, the pull stud 11 is prevented from falling out of the bolt bearing element 18 and thus also from the sleeve-shaped section 10 of the coupling element 6 if the coupling threaded section 15 and the bearing threaded section 17 have been turned out too far from each other. After that, the diameter of the threaded element 16 is larger than the bolt bearing element opening 23, which prevents the pull stud 11 from falling out.

[0028] In Fig. 5 shows two retaining devices 1 that are already pre-assembled on the handrail 7, with the handrail 7 being the functional element. It can be seen that fully extended pull-bolts 11 hinder the installation of the handrail in a corner of the wall 4. For stability reasons, the retaining devices 1 must be attached near a curve 26 of the handrail 7, with both pull-bolts 11 being inserted simultaneously into the two recesses 14 in the surface 3 of the wall 4.

[0029] The holding devices 1 known from practice, which have non-displaceable pull studs 11 along their longitudinal axis 8, would have the significant disadvantage that when the pull studs 11 are simultaneously inserted into the recesses 14, one of the pull studs 11 will always have an offset 26, wherein the offset 26 corresponds to a length 26 of the other pull stud 11. Mounting the handrail 7 in this way is not possible with the holding devices 1 known from practice and non-displaceable pull studs 11.

[0030] With the Fig. However, with the 5 holding devices 1 according to the invention, the handrail 7 can be mounted simply and easily on the surface 3 of the wall 4, since the tightening bolts 11 can be displaced along their longitudinal axes 8 and can be screwed into the holding device 1 according to the invention. Thus, the offset 26 that interferes with the movement of one holding device 1 on the other holding device 1 no longer occurs.

[0031] In the Fig.6 also shows two holding devices 1, which are also already pre-assembled on the handrail 7. In the case of holding devices 1 according to the invention, which have a movable tightening bolt 11, installation in the corner of the wall 4 can be easily carried out. The tightening bolts 11 can be fully screwed or moved into the holding devices 1, the handrail 7 can be positioned as intended on the surface 3 of the wall 4 with the holding devices 1, and the tightening bolts 11 can be screwed into the recesses 14 in the wall 4 by turning the anchoring sleeves 9 of the holding devices 1, whereby the bolt thread sections 12 engage in the surface thread sections 13 and can fix the handrail 7 to the surface 3. LIST OF REFERENCE SYMBOLS 1. Holding device 2. Contact surface 3. Surface 4th wall 5. End of the coupling element facing away from the surface 6. Coupling element 7. Handrail 8. Longitudinal axis 9. Anchoring sleeve 10. Sleeve-shaped section of the coupling element 11. Pull stud 12. Bolt thread section 13. Surface thread section 14. Recess 15. Coupling thread section 16. Threaded element 17. Bearing thread section 18. Bolt bearing element 19. Star-shaped retaining element 20. Protruding formations 21. Anchoring sleeve opening 22. Coupling sleeve opening 23. Bolt bearing element opening 24. Sliding ring element 25. Shaft 26. Curvature of the handrail 27. Offset / length of the pull stud

Claims

[1] Holding device (1) for releasably securing a functional element (7) to a surface (3) with a coupling element (6), wherein the functional element (7) can be secured to an end (5) of the coupling element (6) facing away from the surface (3), and with an anchoring sleeve (9) connected to the coupling element (6), wherein the coupling element (6) and the anchoring sleeve (9) are arranged along a common longitudinal axis (8) and wherein an end of the coupling element (6) facing the surface (3) is rotatably secured to one another about the longitudinal axis (8) with an end of the anchoring sleeve (9) facing away from the surface (3), wherein the holding device (1) is placed as intended against the surface (3) with a contact surface (2) formed on the anchoring sleeve (9) and facing the surface (3) and is secured to the surface with a tightening bolt (11) projecting into a recess (14) in the surface (3) (3) can be determined,wherein the tightening bolt (11) is mounted in the anchoring sleeve (9) in a rotationally fixed manner with the anchoring sleeve (9) and has a bolt thread section (12) facing the surface (3) which can be brought into engagement with a corresponding surface thread section (13) of the recess (14) arranged in the surface (3), , characterized byin that the pull-in bolt (11) can be brought into engagement with a coupling threaded section (15) having a bearing threaded section (17) arranged on a bolt bearing element (18), wherein the bolt bearing element (18) is arranged in a sleeve-shaped section (10) of the coupling element (6) in a manner which is fixed in relation to the coupling element (6) and which is rotatable about the longitudinal axis (8) relative to the anchoring sleeve (9) in a manner which is non-rotatable and cannot be displaced along the longitudinal axis (8), so that the coupling threaded section (15) of the pull-in bolt (11) can be rotated relative to the bearing threaded section (17) by rotating the anchoring sleeve (9) about the longitudinal axis (8) and can thereby be displaced along the longitudinal axis (8). [2] Holding device (1) according to claim 1, characterized byin that the pull-in bolt (11) has a star-shaped holding element (19) around a shaft (25) arranged between the coupling threaded section (15) and the bolt threaded section (12) of the pull-in bolt (11), wherein the star-shaped holding element (19) can engage with its formations (20) projecting radially from the pull-in bolt (11) in corresponding grooves of the anchoring sleeve (9) so that a rotation of the anchoring sleeve (9) causes a rotation of the pull-in bolt (11) in the same direction, and wherein the bolt bearing element (18) arranged in the sleeve-shaped section (10) of the coupling element (6) can be displaced at the same time in the radial direction in order to be able to compensate for a lateral offset between the pull-in bolt (11) and the recess (14) in the surface (3). [3] Holding device (1) according to claim 2, characterized bythat a holding element diameter of the star-shaped holding element (19) is larger than a diameter of an anchoring sleeve opening (21) of the anchoring sleeve (9), so that the star-shaped holding element (19) cannot be displaced in the longitudinal direction (8) out of the anchoring sleeve (9). [4] Holding device (1) according to one of the preceding claims, characterized by that a diameter of the pin bearing element (18) is larger than a coupling sleeve opening (22), so that the pin bearing element (18) cannot be completely displaced from the coupling sleeve opening (22) of the coupling element (6). [5] Holding device (1) according to one of the preceding claims, characterized by that the coupling threaded portion (15) of the pull stud (11) consists of a threaded element (16) which is fixed to the pull stud (11). [6] Holding device (1) according to claim 5, characterized bythat a diameter of the threaded element (16) is larger than a diameter of a bolt bearing element opening (23) of the bolt bearing element (18) through which the pull-in bolt (11) is guided, so that the pull-in bolt (11) is retained in the sleeve-shaped section (10) of the coupling element (6) by the threaded element (16) and the bolt bearing element (18) which is not displaceable along the longitudinal axis (8). [7] Holding device (1) according to one of the preceding claims, characterized by that the contact surface (2) of the anchoring sleeve (9) has a sliding ring element (24) so that the anchoring sleeve (9) can continue to be rotated with an appropriate amount of force as it becomes increasingly fixed to the surface (3) by increasing tensile force of the tightening bolt (11).

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