ANCHORAGE ELEMENT

Description

[0001] The invention relates to an anchoring element for fastening a climbing formwork to a concrete body.

[0002] Anchoring elements of this type are known in the art. They typically comprise a permanent anchor bolt cast into the concrete, as well as a potentially recoverable coupling element connected to the anchor bolt and used to connect the climbing formwork. The anchor bolt has a head held in the concrete and a threaded rod that engages a threaded hole in the coupling element. For example, see DE 10 2007 059 125 A1.

[0003] Document WO2012 / 129177 discloses a concrete coupling assembly comprising a base holder for attachment to a concrete formwork surface, the base holder including a central opening; a coupling piece having one end disposed in the central opening, the coupling piece having an axis for positioning substantially transversely to the formwork surface, the coupling piece having first and second threaded bores through one end for attachment of a threaded rod; and a separate anchor body threadably attached to the other end of the coupling piece.

[0004] Since the load-bearing capacity of the anchoring systems varies depending on the type of climbing formwork system, several types of stop anchors with different dimensions and payload capacities are known. A disadvantage of the currently available solutions, however, is that the stop anchor type can only be identified before the concrete is cast in. Once the anchoring system has been installed, however, the stop anchor type can often no longer be clearly determined.

[0005] The aim of the invention is to provide a generic anchoring element with which these disadvantages of the prior art can be overcome.

[0006] Against this background, the invention relates to an anchoring element according to claim 1 for fastening a climbing formwork to a concrete body, which anchoring element comprises a locking anchor and a coupling element, wherein the locking anchor has a head and a threaded rod with an external thread, wherein the coupling element is an elongated round body with a base, a casing and a front, and wherein the coupling element has an anchor bore extending axially inward from the base, which has an internal thread that meshes with the external thread of the threaded rod. According to the invention, the end face of the threaded rod has a marking and a viewing opening is provided at the inner end of the anchor bore so that the end face of the threaded rod received in the anchor bore is visible from the outside.

[0007] The anchoring element is cast in concrete in the application and is used to install climbing formwork in the concrete. To enclose the anchoring element in the concrete body, it is attached to the formwork in such a way that the front of the coupling element rests against the formwork and the remaining part of the coupling element with the screwed-in locking anchor points into the space that is being poured with concrete. The locking anchor is then located within the finished concrete body and remains permanently in the hardened concrete as a lost part. The coupling element extends to the surface of the concrete body and its front is accessible and visible from the outside. For example, a threaded bolt can be screwed in there to install the climbing formwork. The coupling element can be removed from the hardened concrete by unscrewing it from the threaded rod of the anchor and can thus be retrieved.The locking anchor and coupling element are typically made entirely of metal. When, in the context of this description of the invention, the threaded rod accommodated in the anchor hole is visible from the outside, this means that the marking is visible through the viewing opening on the outside of the concrete body.

[0008] Accordingly, the viewing opening is designed so that the end face of the threaded rod accommodated in the anchor hole is visible from the front of the coupling element. This ensures that the marking on the end face of the threaded rod, and thus on the lost locking anchor, can be recognized from the outside even when the locking anchor is cast in concrete with the coupling element screwed on.

[0009] According to the invention, the coupling element further comprises a coupling bore extending axially inward from the front, and the viewing opening extends from the anchor bore to the coupling bore. The coupling bore serves for the releasable fastening of any component to the anchoring element and thus ultimately to the concrete body. It is preferably provided that the coupling bore also has an internal thread so that the component can be screwed on with a threaded bolt. The component can be, for example, a suspension shoe for climbing formwork. It is preferably provided that the anchor bore and the coupling bore run coaxially.

[0010] In one embodiment, the inner diameter of the anchor hole is smaller than the inner diameter of the coupling hole. This design allows for a better view through the coupling hole of the viewing window and ultimately of the end face of the threaded rod received in the anchor hole.

[0011] In one embodiment, the anchor bore and the coupling bore converge. In this embodiment, the coupling element is drilled through axially from the back to the front, or has a through-bore running from the back to the front. The bore with the smaller diameter has no bottom, allowing a clear view from the outside of the end face of the anchor bore through the coupling bore.

[0012] According to the invention, a limiting element is provided in the transition area between the anchor bore and the coupling bore. The limiting element serves as the end point of the anchor bore or as a screw-in limiter for the threaded rod in the coupling element. It prevents the locking anchor from being screwed in too far into the coupling element during a smooth transition between the bores and also serves as a defined end point, ensuring that the locking anchor is not screwed in too far. The limiting element can be provided in the anchor bore near the coupling bore or in the coupling bore near the anchor bore. Of course, the transition area can also be understood as the transition from the coupling bore to the anchor bore.

[0013] In one embodiment, the length of the threaded rod exceeds the depth of the anchor hole. The end point of the anchor hole serves both as a stopper and as a marker, ensuring that the locking anchor is not screwed too deeply, but also not too shallowly, into the coupling element. This allows a defined protrusion of the threaded rod to be achieved.

[0014] In one embodiment according to the present disclosure, the limiting element is a pin that protrudes radially from the outer surface of the anchor bore. Such a pin takes up little area of ​​the inner diameter of the anchor bore and therefore leaves much of the front side of the screwed-in locking anchor free, so that the marking is generally easily visible from the outside of the concrete body. In one design variant, the pin can be guided up to the outer surface of the coupling element, which can be advantageous from a manufacturing perspective. In another variant, the pin can be inserted into a blind bore in the wall of the anchor bore. In yet another variant, integral production with, gluing to, or welding to the wall of the anchor bore can be provided.

[0015] According to the invention, the limiting element is an insert that is at least partially annular. The opening enclosed by the ring also allows a clear view of the front side of the screwed-in locking anchor, thus forming a viewing opening. The insert is positively received in a recess on the inside of the anchor bore or the coupling bore.

[0016] The insert can, for example, sit on a step or shoulder formed in the transition area between the anchor hole and the coupling hole.

[0017] In one embodiment, the marking on the end face of the threaded rod indicates the dimension of the locking anchor. For example, the marking can indicate the length and / or diameter of the threaded rod and / or the load-bearing capacity of the locking anchor. Alternatively or additionally, the marking can indicate the diameter of the head of the locking anchor. Written marking or information is preferred. The marking can be in the form of a written code, e.g., letters, numbers, or combinations thereof.

[0018] In one embodiment, the marking on the end face of the threaded rod is a relief marking, i.e., a three-dimensional marking, with characters or symbols protruding three-dimensionally from the surface of the end face or being machined into the material. Examples include engravings or imprints, such as scratches, punches, and the like. These can, of course, also be colored. A relief marking allows for written marking or information. This is a permanent solution.

[0019] In another embodiment, the marking on the end face of the threaded rod can also be a color marking. This can also be combined with a relief marking.

[0020] In one embodiment, the casing of the coupling element widens conically from the base to the front. The conical shape allows for easier removal of the coupling element from the hardened concrete.

[0021] In one embodiment, the base and / or front are flat. However, the base and / or front can also be curved or even hemispherical, blending seamlessly into the shell.

[0022] In one embodiment, an indicator element is provided on the coupling element. The indicator element can be arranged on the front of the coupling element. It can be detachably arranged on the coupling element. Alternatively, it can also be permanently arranged on the front of the coupling element. The indicator element can, for example, be a plastic element that is received in a corresponding recess on the front of the coupling element. It can, for example, be pin-shaped.

[0023] In one embodiment, it is provided that the indicator element is colored at least in sections.

[0024] In one embodiment, the marking on the end face of the threaded rod and the indicator element have a matching symbol, for example, the same symbol or icon, or the same color. In this context, the indicator element can be provided with a color that corresponds to the color of the colored marking. In general, the indicator element can be provided as a simple marking on the front of the coupling element, corresponding to the marking.

[0025] This ensures that a user uses the correct locking anchor together with the correct coupling element.

[0026] In one embodiment, a sleeve is provided around the coupling element, which preferably follows the outer contour of the base and the casing of the coupling element. The sleeve can thus have a cup-shaped configuration in longitudinal section, with the bottom of the cup resting against the base of the coupling element and the casing of the cup resting against the casing of the coupling element. The sleeve simplifies the removal of the coupling element from the concrete and also serves a protective function.

[0027] It can be provided that the sleeve is pushed onto the coupling element from behind, i.e., when assembling the anchoring element with a front opening, the sleeve is pushed from behind over the casing of the coupling element until the bottom of the sleeve rests against the bottom of the coupling element. In one embodiment, the sleeve does not extend all the way to the front end of the casing, but rather an annular collar remains free at the front end of the casing.

[0028] In one embodiment, a sealing lip is provided on the peripheral edge of the aperture, which extends radially beyond the peripheral edge of the anchor hole opening. For example, the radius of the aperture can be slightly smaller than the radius of the anchor hole, and the sealing lip can be formed by the resulting projection of the sleeve base. The sleeve base can be provided with a reduced thickness in the area of ​​the projection to ensure greater elasticity of the sealing lip.

[0029] In one embodiment, the indicator element has a color that matches the color of the sleeve. This ensures that a user uses the appropriate sleeve corresponding to the coupling element.

[0030] Further details and advantages of the invention will become apparent from the exemplary embodiment discussed below with reference to the figures. The figures show: Figure 1: a perspective partial sectional view of an embodiment of an anchoring element according to the present disclosure; Figure 2: a side partial sectional view of the Figure 1 shown anchoring element in the concreted state; and Figure 3: a perspective sectional view of a coupling element of a slightly different embodiment of an anchoring element according to the invention.

[0031] In the Figures 1-2 An embodiment of an anchoring element according to the present disclosure is shown. In Figure 3 A coupling element of an anchoring element according to the invention is shown. Both embodiments are described together below, as there are only minor differences, which will be discussed separately. The same reference numerals are used for corresponding parts.

[0032] The anchoring element of both embodiments is generally designated by the reference numeral 1 and comprises three parts, namely a locking anchor 10, a coupling element 20 and a sleeve 30 fitted onto the coupling element 20.

[0033] The locking anchor 10 is made of steel. It has the shape of a screw and comprises a disc-shaped head 11 perpendicular to axis A and a threaded rod 12 aligned along axis A.

[0034] The disc-shaped head 11 is flat and protruding to ensure good anchoring in hardened concrete. For example, the head 11 can have a radius of between 3 and 15 cm, or 5.5 cm or 9 cm in certain designs. The peripheral edge of the head 11 is not perfectly round but contoured to enable better force transmission when screwing into the coupling element.

[0035] The threaded rod 12 can have a length of, for example, 10 to 20 cm, or in certain designs, 12.5 cm or 17.5 cm. The diameter is, for example, approximately 0.5 cm to 2 cm. The thread of the rod 12 can be a conventional Dywidag thread.

[0036] An engraved marking 13a is applied to the end face 13 of the threaded rod 12, indicating the dimensions of the locking anchor. In the illustrated example, the dimensions are coded by the abbreviation "C17," but this is only intended as an example.

[0037] The coupling element 20 is a round steel body aligned along the axis A. It comprises a flat base 21 perpendicular to the axis A, a casing 22 tapering from the base 21, and a front 23 adjoining the casing 22, which is also flat and perpendicular to the axis A. The base 21 and the front 23 are aligned parallel to each other and are each circular.

[0038] Starting from an opening in the base 21, an anchor hole 24 aligned along axis A extends into the interior of the coupling element 20. The anchor hole 24 has an internal thread that corresponds to the external thread of the bar 12. This can also be a conventional Dywidag thread. The inner diameter of the anchor hole 24 corresponds to the outer diameter of the bar 12 and can accordingly be, for example, between 0.5 and 2 cm. The depth of the anchor hole 24 is less than the length of the bar 12, so that the stop anchor 10, when the bar is fully screwed in, protrudes significantly beyond the base 21 of the coupling element 20. This ensures that the head 11 of the stop anchor 10 is deeply and securely anchored in the concrete 100.

[0039] In addition to the anchor hole 24, the coupling element 20 further comprises a coupling hole 25, which extends from an opening in the front 23 of the coupling element 20 along the axis A into the interior of the coupling element 20. The anchor hole 24 and the coupling hole 25 run coaxially. The coupling hole 25 can also have an internal thread (not shown in detail in the figure), for example to enable a suspension shoe for climbing formwork to be screwed on using a threaded bolt. The diameter of the coupling hole 25 in the illustrated embodiment is slightly larger than the diameter of the anchor hole 24 and can, for example, be between 1 and 3 cm. The total of three millings 26 on the circumference of the coupling hole 25 serve to engage a boring tool.

[0040] The anchor hole 24 and the coupling hole 25 run into each other inside the coupling element 20, so that the coupling element 20 is drilled through in the axial direction from the base 21 to the front 23. This has the advantage that in the concreted state of the anchoring element 1, as shown in Figure 2 As shown, the position of the locking anchor 10 within the anchor bore 24 can be visually determined. Furthermore, when the anchoring element 1 is cast in concrete, the end face 13 of the threaded rod 12 received in the anchor bore 24, thus the marking 13a, in Figure "C17", is visible from the front 23.

[0041] In the embodiment according to Figures 1-2Near the transition to the coupling bore 25, a grooved pin 27a protrudes radially from the wall of the anchor bore 24. On the one hand, it prevents the locking anchor 10 from being screwed too far into the coupling element 20, and at the same time serves as a defined end point for the locking anchor 10, so that it is not screwed too far into the coupling element 20. The bottom of the coupling bore 25 is formed by an annular shoulder 28, which results from the differences in diameter between the anchor bore 24 and the coupling bore 25.

[0042] In the embodiment according to Figure 3A compression sleeve 27b is provided at the transition to the coupling bore 25. It is pressed into a recess on the inside of the anchor bore 24 in a form-fitting manner. The side of the compression sleeve 27a facing the coupling bore 25 is flush with the annular shoulder 28 and, together with it, forms the bottom of the coupling bore 25. The side of the compression sleeve 27a facing the anchor bore 24 fulfills the same function as the grooved pin 27a.

[0043] In all embodiments according to Figures 1-3the sleeve 30 is made of plastic. It has a cup-shaped configuration and follows the contour of the coupling element 20, i.e., it has a flat base 31 perpendicular to the axis A and a jacket 32 ​​that diverges conically from the base 31. It is pushed onto the coupling element in such a way that the base 31 of the sleeve 30 rests against the base 21 of the coupling element 20 and the jacket 32 ​​of the sleeve 30 rests against the jacket 22 of the coupling element 20. However, the jacket 32 ​​of the sleeve 30 does not quite reach the ceiling-side end of the jacket 22 of the coupling element 20, but ends shortly before it, so that a collar at the ceiling-side end of the jacket surface 22 remains uncovered. The width of the collar can, for example, be between 1 and 2 cm. The sleeve 30 does not have a front but is open towards the front.

[0044] A circular opening is provided in the base 31 of the sleeve 30, aligned with the anchor hole 24 of the coupling element 20. It has a slightly smaller radius than the opening of the anchor hole 24 in the base 21 of the coupling element 20, so that the base 31 of the sleeve 30 protrudes slightly radially beyond the peripheral edge of the anchor hole 24. The protrusion functions as a sealing lip and prevents liquid concrete from penetrating the gap between the anchor hole 24 and the threaded rod 12. In the area of ​​the protrusion, the base 31 of the sleeve 30 has a reduced thickness to ensure greater elasticity of the sealing lip.

[0045] To the side of the coupling hole 25, on the front 23 of the coupling element 20, there is also an indicator hole into which a plastic indicator pin 29 is inserted. The indicator pin 29 and the sleeve 30 are the same color. This ensures that a user places the correct sleeve 30 on the correct coupling element 20.

[0046] The anchoring element 1 shown according to all embodiments of the Figures 1-3is cast in concrete in the application and is used to install a climbing formwork in the existing parts of a concrete structure. The locking anchor 10 represents a lost part and remains permanently in the concrete 100. The coupling element 20 extends to the surface of the concrete body and is accessible from the outside. It can be unscrewed and recycled when the anchoring element 1 is dismantled. The ability to unscrew the coupling element 20 is due on the one hand to its conical shape and on the other hand to the plastic sleeve 30. The sleeve 30 can also be removed from the concrete and recycled after the coupling element 20 has been unscrewed. To enclose the anchoring element 1 in the concrete body 100, it is attached to a formwork in such a way that the front 23 of the coupling element 20 rests against the formwork and the anchoring element 1 then extends along axis A into the space, which is then poured with concrete 100.The formwork is parallel to the plane of the front 23 and thus also to the base 21 of the coupling element 20.

Claims

1. Anchoring element (1) for fastening a climbing formwork to a concrete body (100), comprising a locking anchor (10) and a coupling element (20), wherein the locking anchor (10) has a head (11) and a threaded rod (12) with an external thread, wherein the coupling element (20) is a body, in particular an elongated body, with a base (21), and preferably with a casing (22) and a front (23), and wherein the coupling element (20) has an anchor bore (24) extending axially inwards from the base (21), which anchor bore (24) has an internal thread which meshes with the external thread of the threaded rod (12), characterized in that the end face (13) of the threaded rod (12) has a marking (13a) and that an opening, in particular a visible opening, is provided at the inner end of the anchor bore (24), so that the end face (13) of the threaded rod (12) accommodated in the anchor bore (24) is visible from the outside, wherein the coupling element (20) further comprises a coupling bore (25) extending axially inwards from the front (23) and that the visible opening extends from the anchor bore (24) to the coupling bore (25) and wherein a limiting element (27) is provided in the transition region between the anchor bore (24) and the coupling bore (25) and wherein the limiting element (27) is formed by an insert (27b) which is annular at least in sections and the insert (27b) is received in a form-fitting manner in a recess on the inside of the anchor bore (24) or of the coupling bore (25).

2. Anchoring element according to claim 1, characterized in that the inner diameter of the anchor bore (24) is smaller than the inner diameter of the coupling bore (25).

3. Anchoring element according to claim 1 or 2, characterized in that the anchor bore (24) and the coupling bore (25) run into each other.

4. Anchoring element according to one of the preceding claims, characterized in that the marking (13a) on the end face (13) of the threaded rod (12) indicates the dimension of the locking anchor (10).

5. Anchoring element according to one of the preceding claims, characterized in that the marking (13a) on the end face (13) of the threaded rod (12) is a relief marking.

6. Anchoring element according to one of claims 1 to 5, characterized in that the marking (13a) on the end face (13) of the threaded rod (12) is a color marking.

7. Anchoring element according to one of the preceding claims, characterized in that an indicator element (29) is provided at the coupling element (20), which is, preferably releasably, mounted preferably on the front (23) of the coupling element (20).

8. Anchoring element according to claim 7, characterized in that the marking (13a) and the indicator element (29) exhibit a matching symbolism.

9. Anchoring element according to claim 8, characterized in that the indicator element (29) exhibits a color which corresponds to the color of the color marking (13a).

10. Anchoring element according to one of the preceding claims, characterized in that a sleeve (30) arranged around the coupling element (20) is provided which preferably follows the outer contour of the base (21) and of the casing (22) of the coupling element (20).

11. Anchoring element according to claim 10, characterized in that the indicator element (29) exhibits a color which corresponds to the color of the sleeve (30).