ANCHOR

Description

[0001] The invention relates to an anchor for arrangement in a building element, in particular in a wall, in a ceiling or in a precast concrete element, comprising: an anchoring element for anchoring in a receiving opening of the structural element having an undercut, a connecting element for connection to a supporting element, in particular to a platform for formwork or to a supporting arm for a protective shield, or to a lifting element for lifting the structural element.

[0002] Furthermore, the invention relates to an anchoring device and a component with such an anchor.

[0003] Finally, the invention relates to a method for at least partially recovering an armature from a component.

[0004] Such an anchor is known, for example, from WO2008 / 019408 A1. In this prior art, a structure is erected using climbing formwork. The climbing formwork comprises climbing units that are secured to already completed wall sections by means of climbing rails. The climbing rails are supported by climbing shoes, which are held to the wall by the anchors. The anchors have conical sections adjacent to the wall surface, to which the climbing shoes can be screwed.

[0005] A disadvantage, however, is that part of the anchor, especially the so-called locking anchor, is introduced into the structure as a foreign body, which remains in the structure even after completion. Furthermore, the material costs are high.

[0006] JP 3 145993 U and DE 18 36 287 U describe different types of anchors that are anchored in straight, cylindrical boreholes. Other anchors are known, for example, from WO 03 / 001070 A2, DE 32 12 634 A1, US 2019 / 233256 A1, DE 10 2008 064052 A1, and JP 2 986352 B2.

[0007] The object of the invention is to alleviate or eliminate at least some of the disadvantages of the prior art. The invention particularly aims to enable easy recovery of at least parts of the anchor for further use.

[0008] This object is achieved by an anchor having the features of claim 1, an anchoring device having the features of claim 8, a component having the features of claim 9 and a method having the features of claim 10.

[0009] According to the invention, the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the component, wherein a securing element movable between a first position and a second position is provided, which securing element is designed to block the movement of the anchoring element between the anchoring position and the release position in the first position and to release it in the second position.

[0010] In the second position of the securing element (unlocked position), the movement of the anchoring element is released, so that the anchoring element can be moved from the anchoring position to the release position (and vice versa), preferably reversibly and without permanent deformation. In the first position of the securing element, the movement of the anchoring element is blocked, so that the anchoring element is reliably anchored in the undercut of the receiving opening. Preferably, in the first position, the securing element bears against the anchoring element in such a way that movement of the anchoring element in the direction of the release position is prevented. Moving the securing element from the first position to the second position prepares the removal of the anchoring element from the receiving opening.In the second position of the securing element, the anchoring element can be transferred from the anchoring position, in which the anchoring element engages the undercut of the receiving opening in the component, to the release position, in which the anchoring element is completely moved out of the undercut of the receiving opening. Preferably, the securing element is displaceable between the first and second positions, preferably in the axial direction, i.e., in the direction of the central longitudinal axis of the elongated anchor. In the release position, the anchoring element, preferably together with the connecting element and the securing element, can be removed from the receiving opening of the component.

[0011] In a preferred embodiment, the securing element is designed as an extraction element for pulling the anchor out of the receiving opening, so that applying a tensile force to the securing element, in particular via a tool, not only releases the anchoring element but also allows the anchor to be pulled out of the receiving opening. In this embodiment, the anchoring element can be moved passively into the release position through contact with the (concrete) body of the structural element surrounding the anchor when the anchor is pulled out of the receiving opening via the securing element.

[0012] Furthermore, the invention provides an actuating element configured to transfer the anchoring element between the anchoring position and the release position. Upon moving the actuating element from a first to a second position, a force is transmitted to the anchoring element such that the anchoring element is moved, preferably inwardly, from the anchoring position to the release position. In this embodiment, the anchoring element is actively moved into the release position via the actuating element, with the securing element arranged in the second position.

[0013] It is particularly preferred if the securing element and the actuating element are implemented by a securing and actuating element, which causes the anchoring element to be unlocked and the anchoring element to be actively moved into the release position. In an alternative embodiment, however, the securing element and the actuating element can be formed by different components.

[0014] To operate the securing and actuating element, a tool is preferably used that is detachably connected to the anchor only for retrieving the anchoring element and, if necessary, also the connecting element. When the supporting element is attached to the anchor during use, the tool is not connected to the anchor. According to the invention, the anchor can be at least partially removed from the structure after use. Advantageously, no unnecessary foreign bodies remain in the structure. This avoids the risk of corrosion associated with conventional locking anchors. Another advantage is that the anchor can be reused, thus resulting in cost savings.

[0015] Preferably, the anchoring element, the connecting element and the securing element, preferably also the actuating element, are captively connected to one another.

[0016] The anchor according to the invention can be used for various purposes during the construction of the structure.

[0017] In a first application, the anchor holds a support arm, which can preferably be arranged horizontally on a (concrete) ceiling. A climbing profile is preferably attached to the support arm, which in particular carries a protective shield for shielding an outer edge of the ceiling during the construction of a building.

[0018] In a second application, the anchor supports a platform with a formwork, in particular with a wall formwork, for casting a (concrete) wall.

[0019] In a third application, the anchor is arranged in a precast concrete element, wherein a lifting element, for example a crane, is attached to the anchor for lifting the precast concrete element. In order to enable stable anchoring in the anchoring position and easy removal in the release position, the anchoring element according to the invention has an expansion part at its rear end, which in the anchoring position projects radially outwards with respect to the outer side of the connecting element at the rear end region thereof and in the release position is arranged the same distance or further inwards in the radial direction than the outer side of the connecting element at the rear end region thereof. Thus, in the anchoring position, the expansion part effects a positive connection between the anchoring element and the receiving opening of the structural element.By transferring the anchoring element into the release position by means of the actuating element or additionally passively via the surrounding (concrete) body of the structural element, the expansion part is displaced inwardly to such an extent that the expansion part no longer protrudes beyond the outer side of the connecting element on the anchoring element side. In the release position, the anchoring element, preferably together with the connecting element and the securing element, preferably also with the actuating element, can be pulled out of the receiving opening in the axial direction. This enables reuse of the anchoring element, in particular also of the connecting element and the securing element, preferably also of the actuating element, in a particularly simple manner.

[0020] To anchor the anchor as effectively as possible in the structural element, it is advantageous if the anchoring element has several, in particular three, expansion parts, which are preferably arranged at regular angular intervals in the circumferential direction. In a particularly preferred embodiment, exactly three identical expansion parts are provided, each of which is offset by 120 degrees from one another in the circumferential direction.

[0021] For the purposes of this disclosure, the terms "axial," "radial," and "tangential," etc., refer to the central longitudinal axis of the anchor. If the anchor is used in the construction of a structure, the location and direction specifications, such as "vertical," "horizontal," etc., refer to a structure with horizontal ceilings and vertical walls. If the building geometry differs, the location and direction specifications must be transferred accordingly.

[0022] To enable the movement of the expansion parts, gaps are preferably formed between the expansion parts in the anchoring position, which gaps are at least partially, in particular completely, closed in the release position. Thus, the gaps can be used to enable the movement of the expansion parts from the outer anchoring position to the inner release position, i.e., inward. Preferably, the expansion parts abut one another on the inside in the release position. In this embodiment, the gaps are completely closed in the release position.

[0023] To transfer the anchoring element from the anchoring position to the release position, according to the invention, the securing and actuating element is arranged inside the anchoring and connecting elements, movably, in particular displaceably in the axial direction. In a preferred embodiment, the movement of the actuating element, preferably in the axial direction, can be converted into the displacement of the anchoring element, preferably radially inward, in order to release the engagement of the anchoring element in the undercut of the receiving opening and thus enable the removal of the anchoring element from the receiving opening.

[0024] To release the anchoring element, it is particularly advantageous if the anchoring element can be pivoted between the anchoring and release positions.

[0025] It is also preferred that the securing and actuating element is axially displaceable, so that the axial displacement of the securing element is converted into the release of the anchoring element or the axial displacement of the actuating element is converted into the pivoting of the anchoring element.

[0026] In a preferred embodiment, the connecting element has a pivot axis, in particular running substantially perpendicular to the axial direction, for the pivotable arrangement of the anchoring element, wherein preferably a plurality of pivot axes, in particular running substantially perpendicular to the axial direction, are provided for the pivotable arrangement of the expansion parts of the anchoring element.

[0027] In a preferred embodiment, a longitudinal section of the connecting element, which can also extend over substantially the entire length of the connecting element, has a non-circular outer contour in cross-section (seen perpendicular to the longitudinal axis), in particular an angular outer contour, for example a hexagonal outer contour. This embodiment has the advantage that torsional forces, i.e., forces that would cause the armature to twist about its longitudinal axis, can be reliably dissipated into the component.

[0028] Effective force transmission to the anchoring element on the one hand and stable and secure anchoring on the other hand are achieved according to the invention because the securing and actuating element has an actuating head for transferring the anchoring element from the anchoring to the release position, wherein the actuating head rests on the inside of the expansion part of the anchoring element in the anchoring position. Thus, in the anchoring position, the actuating head preferably blocks movement, in particular pivoting, of the expansion part, preferably from the inside. Advantageously, this reliably prevents malfunction of the anchor in the anchoring position. By moving the actuating head away from the expansion part, in particular in the axial direction, the movement of the expansion part can be released in order to prepare for the removal of the anchoring element from the receiving opening of the component.Preferably, the actuating head is widened compared to a longitudinal section of the securing and actuating element, which preferably adjoins it to the front.

[0029] Furthermore, according to the invention, the anchoring element has an actuating arm at the front end, onto which the actuating head of the securing and actuating element can be pushed in order to move, in particular pivot, the anchoring element into the release position. In the anchoring position, the actuating arm preferably bears against the front longitudinal section of the securing and actuating element, which preferably has a smaller radial extent than the actuating head. The actuating arm of the anchoring element preferably has a contact surface onto which a further contact surface of the actuating head strikes when the securing and actuating element is actuated. As a result, the anchoring element is moved into the release position. The impact of the actuating head on the contact surface of the actuating arm preferably causes the expansion part to pivot.Conversely, pushing in the locking and actuating element causes the anchor to be positioned in the anchoring position. The process is therefore reversible.

[0030] In order to make operation of the securing element as simple as possible, it is advantageous if the securing element has a holding opening, in particular with a thread, for attaching a tool, in particular a pulling tool. If the securing element is also designed as an actuating element, the tool can be brought into engagement, in particular into threaded engagement, with the holding opening of the securing and actuating element in order to actuate the securing and actuating element, in particular to displace it in the axial direction, and thus to release the anchoring element from the undercut of the receiving opening of the component. By handling the tool, in particular by applying a pulling force to the tool, at least the anchoring element, preferably simultaneously the connecting element and the securing and actuating element, can be removed from the removal opening.

[0031] To enable the reversibly detachable attachment of the support element to the anchor, the connecting element preferably has an internal thread for a fastening screw. The connecting element preferably has a cylindrical section and / or a conical section, particularly at the front end. The conical shape allows the part to be removed from the concrete after use.

[0032] In a preferred use of the anchor, the fastening screw is connected to the connecting element, wherein the fastening screw preferably secures the securing and actuating element against a transfer of the anchoring element from the anchoring to the release position.

[0033] In a further embodiment, a securing means, for example a spring, is provided which secures the securing and actuating element - regardless of the presence of the fastening screw - against a transfer of the anchoring element from the anchoring to the release position.

[0034] In another embodiment, the actuating element is designed as a screw that is displaced in the axial direction by rotation. In this embodiment, a locking device can be omitted.

[0035] To enable the anchor to be embedded in concrete without compromising its function, the anchoring element can, in a preferred embodiment, be accommodated in a sealing sleeve, which preferably has at least one predetermined breaking point. The predetermined breaking point can run spirally along the outer surface of the sealing sleeve and serves to facilitate removal after use.

[0036] In a further embodiment, the sealing sleeve is elastic and is captively connected to the anchoring element and / or to the connecting element.

[0037] A sealing sleeve is preferred but not absolutely necessary. Alternatively, the receiving opening can be created with a pre-cone, which is subsequently removed. Furthermore, the receiving opening can be created using a spacer, for example, made of Styrofoam, which is then removed, for example, chemically or thermally, before the anchor is inserted into the receiving opening. Furthermore, the receiving opening can be formed by a bore.

[0038] In a structure according to the invention, at least: a building element, in particular a wall or a ceiling, an anchor according to one of the previously described embodiments, wherein the anchor is arranged in the receiving opening of the building element, preferably a support element, in particular a support arm, preferably with a climbing profile, or a platform with a wall formwork.

[0039] In a precast concrete element according to the invention, at least: a precast concrete part, for example a concrete slab, an anchor according to one of the previously described embodiments, wherein the anchor is arranged in the receiving opening of the precast concrete part, a lifting element, for example a crane, which is detachably connected to the connecting element of the anchor.

[0040] With this design, the anchor can be used to lift the precast concrete element, for example, between a vertical and a horizontal position. The precast concrete element can also be loaded onto a truck.

[0041] In the method according to the invention for at least partially recovering the armature from the component, at least the following steps are carried out, preferably in succession: Arranging the anchor in the receiving opening of the component, attaching a tool to the securing element of the anchor, transferring the securing element from the first position to the second position with the aid of the tool, transferring the anchoring element of the anchor from the anchoring position to the release position, and removing the anchoring element, in particular also the connecting element and the securing element, from the component.

[0042] Furthermore, an unclaimed method for erecting a building may comprise at least the following steps, whereby further steps may of course be carried out between the steps mentioned: Manufacturing a structural element, in particular a wall or a ceiling, of the building, arranging an anchor according to one of the previously described embodiments in a receiving opening of the structural element, connecting a support element, preferably a support arm for a climbing profile or a platform with formwork, in particular via a fastening screw, to the connecting element of the anchor, holding the support element by means of the anchor, releasing the connection between the support element and the connecting element, wherein, if present, the fastening screw is removed from the connecting element, attaching a tool to the securing element of the anchor, transferring the securing element from the first position to the second position with the aid of the tool, transferring the anchoring element of the anchor from the anchoring position to the release position, and removing the anchoring element, in particular also the connecting element and the securing element,from the component using the tool. ,

[0043] The invention is further explained below using a preferred embodiment. Fig. 1 shows a building after completion of several floors to which horizontal support arms for a vertical climbing profile are attached by means of recoverable anchors according to an embodiment of the invention. Fig. 2 shows the temporary fastening of a stage with a formwork using the recoverable anchors. Fig. 3 shows the anchor according to Fig. 1, 2 in an anchoring position. Fig. 4 shows the anchor in the installed state in the structure in the anchoring position, with a fastening screw screwed into a connecting element of the anchor. Fig. 5 shows the armature in the position according to Fig. 4 , but the fixing screw is removed from the internal thread to prepare for the recovery of the anchor. Fig. 6shows the connection of an external tool with a locking and actuating element of the anchor. Fig. 7 shows the operation of the tool, which causes several expansion parts to be pulled together by moving the locking and actuating element in order to release the engagement of the anchor in the component. Fig. 8 shows the anchor outside the component, whereby in the version shown a sealing sleeve remains in the component. Fig. 9 shows the armature in the release position when connected to the tool. Fig. 10 and Fig. 11 show a sealing sleeve of the anchor. Fig. 12 shows a section through an alternative anchor in which the connecting element has a hexagonal outer contour.

[0044] In Fig. 1a first example of the application of an anchor 1 in the construction of a structure 2, in this case a multi-story building, is shown. In the state shown, several, here four, ceilings 3 of storeys lying one above the other have already been concreted. Arranged on the lower ceilings 3 are several horizontal support arms 4, each of which has a climbing shoe 5 at the front end for a vertical climbing profile 6. In the design shown, a protective shield is attached to the climbing profile 6, with which the open sides of the storeys 3 are secured during the construction process. The climbing profile 6 can be raised using a self-climbing device or a crane (not shown). The support arms 4 are temporarily attached to the ceilings using the anchors 1. In this design, the anchors 1 are arranged vertically in the ceilings.

[0045] In Fig. 2A second example of the application of the anchor 1 in the construction of vertical walls 7 of successive floors of the building 2 is shown. In this application, the anchor 1 is concreted in the horizontal state into a first (topmost) wall 7a in order to support a platform 8 for a wall formwork 9 in the next concreting step. In the construction progress shown, a further anchor 1 on a second wall 7b (lying below the topmost wall 7a) supports the platform 8 from a previous concreting step, on which the wall formwork 9 is arranged for concreting the topmost wall 7a. In the embodiment shown, a further anchor 1 is also arranged on a third wall 7c below the second wall 7b in order to enable guying of the platform 8. The embodiment shown shows a crane climbing system. In a self-climbing system (not shown), a climbing profile can be held by the lower anchor via a climbing shoe.

[0046] In the Fig. 3 to 9 The anchor 1 is shown in various functional positions. The anchor 1 is used for the reversibly detachable attachment of a support element, for example, the support arm 4 (see Fig. 1 ) or the platform 8 for the wall formwork 9 (cf. Fig. 2 ) into a receiving opening 10 of a building element, in particular the ceiling 3 (cf. Fig. 1 ) or wall 7 (cf. Fig. 2 ). Preferably, the anchor 1 is cast into the building element, i.e., introduced into the formwork space before concreting. The receiving opening 10 has an undercut 11 on the rear side, ie on the side facing away from the outside of the building element, in which an anchoring element 12 of the anchor 1 can be anchored such that the anchor 1 is secured in the axial direction, ie in the direction of a central longitudinal axis 12a of the elongated anchor 1, against removal from the building element. Fig. 3 to 6the anchoring element 12 is shown in the anchoring position in which the anchoring element 12 engages positively in the undercut 11 of the receiving opening 10 of the component.

[0047] At the front (i.e., towards the outside of the component), the anchor 1 has a connecting element 13, which can be reversibly and detachably connected to the support element. In the embodiment shown, the connecting element 13 has a cylindrical section at the rear and a conically widened section at the front. In the embodiment shown, the connecting element 13 has an internal thread 14, which can be connected to an external thread 15 of a fastening screw 16. According to Fig. 4The fastening screw 16 is attached to the connecting element 13. In this position, the anchor 1 can support the load-bearing element. To prepare for the removal of the anchor 1, the fastening screw 16 is unscrewed from the connecting element 13 (see Fig. 5 ).

[0048] As can be seen from the drawing, the anchor 1 further comprises a securing and actuating element 17, with which the anchoring element 12 can be released from the Fig. 3 to 6 shown outer anchoring position into a Fig. 7 to 9 shown inner release position to enable recovery of at least the anchoring element 12 and the connecting element 13. The anchoring element 12, the connecting element 13 and the securing and actuating element 17 are preferably formed of metal.

[0049] The anchoring element 12 has at least one expansion part 18 at its rear end, in the region of the undercut 11 of the receiving opening 10. In the outer anchoring position, the expansion part 18 projects outward in the radial direction (perpendicular to the longitudinal axis 12) beyond the outer side of the connecting element 13 at its rear end region in order to establish a positive connection between the anchoring element 12 and the receiving opening 10. In the inner release position, the expansion part 18 is arranged at the same distance or further inward than the outer side of the connecting element 13 at its rear end region, as seen in the radial direction, in order to enable withdrawal in the axial direction.

[0050] In the embodiment shown, the anchoring element 12 has several, here three, identical expansion parts 18, which are arranged at regular angular intervals in the circumferential direction (i.e., tangentially with respect to the cylindrical portion of the connecting element 13). In the outer anchoring position, separate spaces are formed between the expansion parts 18, which are at least partially closed in the release position, and completely closed in the embodiment shown.

[0051] The securing and actuating element 17 is arranged movably inside the anchoring element 13, in the embodiment shown, displaceable in the axial direction. The displacement of the securing and actuating element 17 causes the anchoring element 12 to pivot between the anchoring and release positions. In the embodiment shown, the expansion parts 18 are mounted on the connecting element 13 via pivot axes 19. To transfer the anchoring element 12 from the outer anchoring to the inner release position, the securing and actuating element 17 has an actuating head 20 at its rear end. In the outer anchoring position, the actuating head 20 rests on the inside against the expansion parts 18 of the anchoring element 12.In the embodiment shown, the expansion parts 18 each have an actuating arm 21 at their front ends, onto which the actuating head 20 of the securing and actuating element 17 can be pushed such that the expansion parts 18 are pivoted into the inner release position. Furthermore, the securing and actuating element 17 has a retaining opening 22 at its front end, to which a tool 23 can be reversibly and detachably attached in order to remove the armature 1 from the component. In the embodiment shown, the retaining opening 22 has a thread 24 into which the tool 23 can be screwed.

[0052] In the embodiment shown, a sealing sleeve 25 shaped to correspond to the receiving opening 10 is also provided, which surrounds the anchor 1 in the receiving opening 10 of the structural element at least to the extent that encasing the anchor 1 in concrete does not impair the functions of the anchor 1. The sealing sleeve 25 can have predetermined breaking points 26 to facilitate later removal of the sealing sleeve 25 from the structural element.

[0053] From the Figures 4 to 8 shows the process of recovering parts of anchor 1.

[0054] First, the anchor 1 is arranged in the receiving opening 10 of the component. The fastening screw 16 is connected to the connecting element 13 in such a way that the fastening screw 16 secures the locking and actuating element 17 against transfer of the anchoring element 12 from the outer anchoring position to the inner release position (see. Fig. 4 ).

[0055] The fastening screw 16 is then unscrewed from the connecting element 13 (see Fig. 5 ).

[0056] The tool 23 is then attached to the securing and actuating element 17 of the armature 1 (cf. Fig. 6 ). The tool 23 has a handle 27 which facilitates screwing the tool into the holding opening 22 of the securing and actuating element 17 and pulling out the anchor.

[0057] By applying a tensile force to the tool 23, the anchoring element 12 of the anchor 1 can then be transferred from the outer anchoring position into the inner release position (cf. Fig. 7 ).

[0058] By continuing to pull on the tool 23, the anchoring element 12 is removed together with the connecting element 13 from the receiving opening 10 of the component (cf. Fig. 8 ).

[0059] In Fig. 12A schematic section through the anchor 1 in the area of ​​the connecting element 13 is shown, which in the embodiment shown has a square, here hexagonal, outer contour to enable the dissipation of torsional forces (see double arrow 28). For the sake of clarity, the internal structure of the connecting element 13 is not shown.

Claims

1. An anchor (1) for arrangement in a building element, in particular in a wall (7), in a ceiling (3) or in a precast concrete part, comprising: - an anchoring element (12) for anchoring in a receiving opening (10) of the building element comprising an undercut (11), - a connecting element (13) for connection to a supporting element, in particular to a platform (8) for formwork, or to a support arm (4) for a protective shield, or to a lifting element for lifting the building element, wherein the anchoring element (12) is movable from an anchoring position, which engages in the undercut of the receiving opening (10) for anchoring in the receiving opening (10), into a release position for removal from the building element, and vice versa, wherein a securing and actuating element (17) which can be moved between a first position and a second position is provided for transferring the anchoring element (12) between the anchoring position and the release position, wherein the securing and actuating element (17) blocks the movement of the anchoring element (12) between the anchoring position and the release position in the first position and releases the latter in the second position, wherein the anchoring element (12), at its rear end, comprises a splaying part (18), which, in the anchoring position, projects outwards at its rear end region in the radial direction beyond the outer side of the connecting element (13) and, in the release position, is arranged at its rear end region in the radial direction inside the outer side of the connecting element (13), wherein the securing and actuating element (17) is arranged movable, in particular displaceable in the axial direction, in the interior of the anchoring element (12) and the connecting element (13), wherein the securing and actuating element (17) comprises an actuating head (20) for transferring the anchoring element (12) from the anchoring position into the release position, wherein the actuating head (20) in the anchoring position abuts on the inside against the splaying part (18) of the anchoring element (12), characterized in that, the anchoring element (12), at the front end, comprises an actuating arm (21), onto which the actuating head (20) of the securing and actuating element (17) can be pushed, in order to move the anchoring element (12) into the release position.

2. The anchor according to claim 1, characterised in that the anchoring element (12) comprises a plurality, in particular three, of splaying parts (18), which are preferably arranged at regular angular intervals in the circumferential direction.

3. The anchor (1) according to claim 1 or 2, characterised in that the anchoring element (12) can be swivelled between the anchoring position and the release position.

4. The anchor (1) according to any one of claims 1 to 3, characterised in that the securing and actuating element (17) comprises a retaining hole (22), in particular with a thread (24), for the fitting of a tool (23), in particular a pulling tool.

5. The anchor (1) according to any one of claims 1 to 4, characterised in that the connecting element (13) comprises an inner thread (14) for a fastening screw (16).

6. The anchor according to claim 5, characterised in that the fastening screw (16) is connected to the connecting element (13), wherein the fastening screw (16) preferably secures the securing and actuating element (17) against a transfer of the anchoring element (12) from the anchoring position into the release position.

7. The anchor according to any one of claims 1 to 6, characterised in that the anchoring element (12), preferably also the connecting element (13), is accommodated in a sealing sleeve (25), which preferably comprises at least one predetermined break point (26).

8. An anchoring device, comprising: - an anchor (1) according to any one of claims 1 to 7, - a tool (23), which is connected to the securing element of the anchor (1).

9. A building element, in particular a wall (7), a ceiling (3) or a precast concrete part, with an anchor (1) according to any one of claims 1 to 7, which is arranged in the receiving opening (10) of the building element.

10. A method for the at least partial retrieval of an anchor (1) from a building element, comprising the steps: - arranging an anchor (1) according to any one of claims 1 to 7 in the receiving opening (10) of the building element, - fitting of a tool (23) to the securing element of the anchor (1), - transferring the securing element from the first position into the second position with the aid of the tool (23), - transferring the anchoring element (12) of the anchor (1) from the anchoring position into the release position, and - removing the anchoring element (12), in particular also the connecting element (13) and the securing element (17), from the building element.