Anchor

Abstract

An anchor for arrangement in a building element, in particular in a wall, in a ceiling or in a precast concrete part. The anchor includes an anchoring element for anchoring in a receiving opening of the building element comprising an undercut, a connecting element for connection to a supporting element, in particular to a platform for formwork, or to a support arm for a protective shield, or to a lifting element for lifting the building element. In some aspects, the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the building element. The anchor may additionally include a securing element which blocks the movement of the anchoring element between the anchoring position and the release position in a first position and releases the anchoring element in a second position.

Claims

1. An anchor for arrangement in a building element, comprising: an anchoring element for anchoring in a receiving opening of the building element comprising an undercut, the anchoring element comprising a splaying part, a connecting element for connection to a supporting element, wherein the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the building element, wherein the splaying part of the anchoring element, in the anchoring position, projects outward at a rear end region in a radial direction beyond an outer side of the connecting element and, in the release position, is arranged at the rear end region in the radial direction inside the outer side of the connecting element, wherein a securing element which can be moved between a first position and a second position is provided, which blocks movement of the anchoring element between the anchoring position and the release position in the first position and releases the anchoring element in the second position, further comprising a securing and actuating element for transferring the anchoring element between the anchoring position and the release position, wherein the securing and actuating element is arranged movable in an interior of the anchoring element and/or the connecting element, wherein the securing and actuating element comprises an actuating head for transferring the anchoring element from the anchoring position into the release position, and wherein a front end of the anchoring element opposite the rear end comprises an actuating arm, onto which the actuating head of the securing and actuating element is pushed, in order to move the anchoring element into the release position.

2. The anchor according to claim 1, wherein the anchoring element comprises a plurality of splaying parts.

3. The anchor according to claim 1, wherein the securing and actuating element is arranged displaceable in an axial direction, in the interior of the anchoring element and/or the connecting element.

4. The anchor according to claim 1, wherein the anchoring element can be swivelled between the anchoring position and the release position.

5. The anchor according to claim 3, wherein the actuating head in the anchoring position abuts on an inside against the splaying part of the anchoring element.

6. The anchor according to claim 1, wherein the securing element comprises a retaining hole with a thread, for fitting of a tool.

7. The anchor according to claim 1, wherein the connecting element comprises an inner thread for a fastening screw.

8. The anchor according to claim 7, wherein the fastening screw is connected to the connecting element, and wherein the fastening screw secures the securing and actuating element against a transfer of the anchoring element from the anchoring position into the release position.

9. The anchor according to claim 1, wherein the anchoring element is accommodated in a sealing sleeve, which comprises at least one predetermined break point.

10. The anchor of claim 1, wherein the supporting element is a platform for a form work, a support arm for a protective shield, or a lifting element for lifting the building element.

11. The anchor according to claim 2, wherein the plurality of splaying parts is three splay elements.

12. The anchor according to claim 2, wherein the plurality of splaying parts are arranged at regular angular intervals in a circumferential direction.

13. The anchor of claim 6, wherein the tool is a pulling tool.

14. The anchor of claim 9, wherein the connecting element is also accommodated in a sealing sleeve comprising at least one predetermined break point.

15. An anchoring device, comprising: an anchor for arrangement in a building element, comprising: an anchoring element for anchoring in a receiving opening of the building element comprising an undercut, the anchoring element comprising a splaying part, a connecting element for connection to a supporting element or to a support arm for a protective shield, or to a lifting element for lifting the building element, wherein the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the building element, wherein the splaying part of the anchoring element, in the anchoring position, projects outward at a rear end region in a radial direction beyond an outer side of the connecting element and, in the release position, is arranged at the rear end region in the radial direction inside the outer side of the connecting element, wherein a securing element which can be moved between a first position and a second position is provided, which blocks movement of the anchoring element between the anchoring position and the release position in the first position and releases the anchoring element in the second position, further comprising a securing and actuating element for transferring the anchoring element between the anchoring position and the release position, wherein the securing and actuating element is arranged movable in an interior of the anchoring element and/or the connecting element, wherein the securing and actuating element comprises an actuating head for transferring the anchoring element from the anchoring position into the release position, wherein a front end of the anchoring element opposite the rear end comprises an actuating arm, onto which the actuating head of the securing and actuating element is pushed, in order to move the anchoring element into the release position, and a tool connected to the securing element of the anchor.

16. A building element, with an anchor arranged in a receiving opening of the building element, wherein the anchor comprises: an anchoring element for anchoring in the receiving opening of the building element comprising an undercut, the anchoring element comprising a splaying part, a connecting element for connection to a supporting element or to a support arm for a protective shield, or to a lifting element for lifting the building element, wherein the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the building element, wherein the splaying part of the anchoring element, in the anchoring position, projects outward at a rear end region in a radial direction beyond an outer side of the connecting element and, in the release position, is arranged at the rear end region in the radial direction inside the outer side of the connecting element, wherein a securing element which can be moved between a first position and a second position is provided, which blocks movement of the anchoring element between the anchoring position and the release position in the first position and releases the anchoring element in the second position, further comprising a securing and actuating element for transferring the anchoring element between the anchoring position and the release position, wherein the securing and actuating element is arranged movable in an interior of the anchoring element and/or the connecting element, wherein the securing and actuating element comprises an actuating head for transferring the anchoring element from the anchoring position into the release position, wherein a front end of the anchoring element opposite the rear end comprises an actuating arm, onto which the actuating head of the securing and actuating element is pushed, in order to move the anchoring element into the release position, and wherein the building element is a wall, ceiling, or precast concrete part.

17. A method for at least partial retrieval of an anchor from a building element, comprising the steps of: arranging an anchor in a receiving opening of the building element, wherein the anchor comprises: an anchoring element for anchoring in a receiving opening of the building element comprising an undercut, the anchoring element comprising a splaying part, a connecting element for connection to a supporting element or to a support arm for a protective shield, or to a lifting element for lifting the building element, wherein the anchoring element is movable between an anchoring position for anchoring in the receiving opening and a release position for removal from the building element, wherein the splaying part of the anchoring element, in the anchoring position, projects outward at a rear end region in a radial direction beyond an outer side of the connecting element and, in the release position, is arranged at the rear end region in the radial direction inside the outer side of the connecting element, wherein a securing element which can be moved between a first position and a second position is provided, which blocks movement of the anchoring element between the anchoring position and the release position in the first position and releases the anchoring element in the second position, further comprising a securing and actuating element for transferring the anchoring element between the anchoring position and the release position, wherein the securing and actuating element is arranged movable in an interior of the anchoring element and/or the connecting element, wherein the securing and actuating element comprises an actuating head for transferring the anchoring element from the anchoring position into the release position, wherein a front end of the anchoring element opposite the rear end comprises an actuating arm, onto which the actuating head of the securing and actuating element is pushed, in order to move the anchoring element into the release position, fitting a tool to the securing element of the anchor, transferring the securing element from the first position into the second position with aid of the tool, transferring the anchoring element of the anchor from the anchoring position into the release position, and removing the anchoring element, the connecting element, and the securing element, from the building element.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) The invention is explained in greater detail below with the reference to the following figures.

(2) FIG. 1 shows a building structure after completion of a plurality of floors, to which horizontal support arms for a vertical climbing profile are fitted with the aid of retrievable anchors according to an embodiment of the invention.

(3) FIG. 2 shows the temporary fastening of a platform to formwork with the aid of the retrievable anchors.

(4) FIG. 3 shows the anchor according to FIGS. 1, 2 in an anchoring position.

(5) FIG. 4 shows the anchor in an installed state in the building structure in the anchoring position, wherein a fastening screw is screwed into the connecting element of the anchor.

(6) FIG. 5 shows the anchor in a position according to FIG. 4, where the fastening screw is removed from the inner thread in order to provide for the retrieval of the anchor.

(7) FIG. 6 shows the connection of an external tool to a securing and actuating element of the anchor.

(8) FIG. 7 shows the actuation of the tool, which brings about a drawing-together of a plurality of splaying parts by displacement of the securing and actuating element, in order to release the engagement of the anchor in the building part.

(9) FIG. 8 shows the anchor outside the building part, wherein a sealing sleeve remains in the building part in the embodiment shown.

(10) FIG. 9 shows the anchor in the release position in the connected state to the tool.

(11) FIG. 10 and FIG. 11 show a sealing sleeve of the anchor.

(12) FIG. 12 shows a cross-section through an alternative anchor, where the connecting element comprises a hexagonal outer contour.

DETAILED DESCRIPTION

(13) FIG. 1 shows a first example of the application of an anchor 1 for the erection of a building structure 2, in this case a multi-story building. In the shown state, a plurality, here four, ceilings 3 of floors lying above one another have already been concreted. A plurality of horizontal support arms 4 are arranged on lower ceilings 3, each of which include a climbing shoe 5 at the front end for a vertical climbing profile 6. In the embodiment shown, a protective shield is fastened to climbing profile 6, with which the open sides of floors are secured in the construction process. Climbing profile 6 can be placed higher up with the aid of an automatic climbing device or a crane (not shown). Support arms 4 are temporally fastened to the ceilings with anchors 1. In this embodiment, anchors 1 are arranged vertically in the ceilings.

(14) FIG. 2 shows a second example of the application of anchor 1 in the erection of vertical walls 7 of successive floors of building structure 2. In this application, anchor 1 is embedded in concrete in the horizontal state in a first (uppermost) wall 7a, in order to support a platform 8 for wall formwork 9 in the next concreting step. In the shown progress of the building work, a further anchor 1, at a second wall 7b (lying below uppermost wall 7a) of a previous concreting step, supports a platform 8, on which wall formwork 9 for the concreting of uppermost wall 7a is arranged. In the embodiment shown, a further anchor 1 is also arranged at a third wall 7c below second wall 7b, in order to enable anchoring of platform 8. In the embodiment shown, a crane climbing system is shown. With an automatic climbing system (not shown), a climbing profile can be held via a climbing shoe by means of the lower anchor.

(15) Anchor 1 in the various functional positions is represented in the FIGS. 3 to 9. Anchor 1 is arranged for the reversibly detachable fitting of a supporting element, for example support arm 4 (see FIG. 1) or platform 8 for wall formwork 9 (see FIG. 2), into a receiving opening 10 of a building element, in particular ceiling 3 (see FIG. 1) or wall 7 (see FIG. 2). Anchor 1 may be encased in concrete in the building element, i.e. introduced into the formwork space before the concreting. Receiving opening 10 comprises at the rear side, i.e. at the side facing away from the outer side of the building element, an undercut 11, in which an anchoring element 12 of anchor 1 can be anchored in such a way that anchor 1 is secured in the axial direction, i.e. in the direction of a central longitudinal axis 12a of elongated anchor 1, against removal from the building element. In FIGS. 3 to 6, anchoring element 12 is shown in each case in the anchoring position, in which anchoring element 12 engages in a form-fit manner in undercut 11 of receiving opening 10 of the building element.

(16) At the front side (i.e. towards the outer side of the building element), anchor 1 comprises a connecting element 13, which can be connected reversibly detachable to the supporting element. In the embodiment shown, connecting element 13 comprises at the rear a cylindrical section and at the front a section widened conically towards the front. In the embodiment shown, connecting element 13 comprises an inner thread 14, which can be connected to an outer thread 15 of a fastening screw 16. According to FIG. 4, fastening screw 16 is fitted to connecting element 13. In this position, anchor 1 can carry the supporting element. In order to provide for removal of anchor 1, fastening screw 16 is unscrewed from connecting element 13 (see FIG. 5).

(17) As can be seen from the drawing, an anchor 1 also comprises a securing and actuating element 17, with which anchoring element 12 can be transferred from the outer anchoring position shown in FIGS. 3 to 6 into an inner release position shown in FIGS. 7 to 9, in order to enable retrieval at least of anchoring element 12 and connecting element 13. Anchoring element 12, connecting element 13 and securing and actuating element 17 are preferably made of metal.

(18) Anchoring element 12 comprises at least one splaying part 18 at its rear end, in the region of undercut 11 of receiving opening 10. In the outer anchoring position, splaying part 18 projects outwards at its rear end region in the radial direction (perpendicular to longitudinal axis 12) beyond the outer side of connecting element 13, in order to create a form-fit connection between anchoring element 12 and receiving opening 10. In the inner release position, splaying part 18, viewed in the radial direction, is arranged at its rear end region as far or farther inwards than the outer side of connecting element 13, in order to enable pulling-out in the axial direction.

(19) In the embodiment shown, anchoring element 12 comprises a plurality, in this case three, of identical splaying parts 18, which are arranged at regular angular intervals in the circumferential direction (i.e. tangentially relative to the cylindrical cross-section of connecting element 13). In the outer anchoring position, separated intermediate spaces are formed between splaying parts 18, which are at least partially closed, in the embodiment shown completely closed, in the release position.

(20) Securing and actuating element 17 is arranged movable in the interior of anchoring element 13, in the embodiment shown in the axial direction. The displacement of securing and actuating element 17 brings about swivelling of anchoring element 12 between the anchoring position and the release position. In the embodiment shown, splaying parts 18 are mounted on connecting element 13 by means of swivelling pins 19. To transfer anchoring element 12 from the outer anchoring position into the inner release position, securing and actuating element 17 comprises an actuating head 20 at the rear end. In the outer anchoring position, actuating head 20 abuts on the inside against splaying parts 18 of anchoring element 12. In the embodiment shown, splaying parts 18 each comprise at their front ends an actuating arm 21, onto which actuating head 20 of securing and actuating element 17 can be pushed, in such a way that splaying parts 18 are swivelled into the inner release position. In addition, securing and actuating element 17 comprises a retaining hole 22 at the front end, to which a tool 23 can be fitted reversibly detachable, in order to remove anchor 1 from the building element. In the embodiment shown, retaining hole 22 comprises a thread 24, into which tool 23 can be screwed.

(21) In the embodiment shown, a sealing sleeve 25 formed corresponding to receiving opening 10 is also provided, which surrounds anchor 1 in receiving opening 10 of the building element at least to an extent such that the encasement of anchor 1 in concrete and does not impair the functioning of anchor 1. Sealing sleeve 25 can have predetermined breaking points 26, in order to facilitate subsequent removal of sealing sleeve 25 from the building element.

(22) The operational sequence in the retrieval of parts of anchor 1 emerges from FIGS. 4 to 8.

(23) In the first place, anchor 1 is arranged in receiving opening 10 of the building element. Fastening screw 16 is connected to connecting element 13 in such a way that fastening screw 16 secures securing and actuating element 17 against a transfer of anchoring element 12 from the outer anchoring position into the inner release position (see FIG. 4).

(24) Fastening screw 16 is then unscrewed from connecting element 13 (see FIG. 5).

(25) Tool 23 is then fitted to securing and actuating element 17 of anchor 1 (see FIG. 6). Tool 23 comprises a handle 27, with which the screwing-in of the tool into retaining hole 22 of securing and actuating element 17 and the removal of the anchor is facilitated.

(26) By applying a pulling force to tool 23, anchoring element 12 of anchor 1 can then be transferred from the outer anchoring position into the inner release position (see FIG. 7).

(27) By continued pulling on tool 23, anchoring element 12 is removed together with connecting element 13 from receiving opening 10 of the building element (see FIG. 8).

(28) FIG. 12 represents diagrammatically a cross-section through anchor 1 in the region of connecting element 13, which in the embodiment shown comprises an angular, here a hexagonal, outer contour, in order to enable a diversion of torsional forces, see double arrow 28. For the sake of greater clarity, the inner structure of connecting element 13 is not represented.