AU2017201305B2

AU2017201305B2 - Prefabricated connector and connection system for joining prefabricated concrete parts

Info

Publication number: AU2017201305B2
Application number: AU2017201305A
Authority: AU
Inventors: Dirk Albartus; Robert Garke; Thorsten Heidolf; Richard Morsink; Paulus van de Schoor
Original assignee: Leviat GmbH
Current assignee: Leviat GmbH
Priority date: 2016-03-05
Filing date: 2017-02-27
Publication date: 2022-11-10
Anticipated expiration: 2037-02-27
Also published as: EP3214234B1; PL3214234T3; EP3214234A1; HK1243752A1; ES2786182T3; AU2017201305A1; CN107152136A

Abstract

The invention relates to a prefabricated connector (3) for connecting a first prefabricated concrete part (1) to a second prefabricated concrete part (2), as well as a connecting system 5 with such a prefabricated connector (3). The prefabricated connector comprises a base plate (4) and at least one pouring-in anchor (5), which is connected to the base plate (4), for pouring into the first prefabricated concrete part (1), wherein the base plate (4) lies in a base plane and has a through-opening (6) for a connecting element. The base plate (4) and at least one pouring-in anchor (5) are designed as a one-piece sheet metal bending part. The at 0 least one pouring-in anchor (5) is bent out of the base plane by an angle with respect to the base plate (4). The connecting system has positioning means (13) for the positive locking of position of the connecting element, which is passed through the through-opening (6), in the base plane of the base plate (4). 2/6 29 13 18 Z6 5 3 5 27 4 3 Fi g.2

Description

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Prefabricated Connector and Connection system for Joining Prefabricated Concrete Parts

The disclosure relates to a prefabricated connector for connecting a first prefabricated concrete part to a second prefabricated concrete part, as well as a connecting system with such a prefabricated part connector.

Structures are widely built with prefabricated concrete parts, which are connected to each other by suitable connecting systems. Such connecting systems known in the prior art are based on prefabricated part connectors, which are poured therein in a suitable number and positioning during the production of the respective prefabricated concrete part. Later they are used for mounting suitable connecting elements. These are used on site and tightened, whereby the concrete parts are joined together.

Such a connection system is disclosed, for example, in the patent DE-OS 26 23 803. The connecting system shown there comprises a pair of prefabricated connectors, wherein each such prefabricated connector is poured into the adjoining edge regions of two concrete prefabricated parts. The respective prefabricated connector comprises a base plate with two pouring-in anchors, which are welded approximately vertically thereto, whereby the pouring '0 in anchors are completely poured into the concrete material and the base plate only in their regions adjoining the pouring-in anchors. In its middle region, the base plate has a through opening for a connecting element. The associated region of the prefabricated connector is exposed without a concrete encapsulation, so that the connecting element is inserted and can be locked by means of a 90 rotation comparable to a bayonet lock. As a completion of the assembly process, a clamping wedge, which is toothed on the outer surfaces and is otherwise conical, is inserted, which in turn prevents a reverse rotation and thus a release of the connecting element, and which on the other hand axially braces the two concrete parts. Operating loads occurring here are initiated into the two concrete parts by the aforementioned pouring-in anchors.

Although such a kind of connection is in principle at least proven, some aspects have proven to be disadvantageous. Thus, the above-mentioned connecting system requires that a pair of two prefabricated component connectors be cast at each connection point, which entails corresponding costs. The high operating forces must be reliably introduced from the connecting element into the base plate and from there via the pouring-in anchors into the concrete material of the particular prefabricated concrete part. Therefore, special attention must be paid to a load-bearing weld connection between the base plate and the pouring-in anchors. In addition, the pouring-in anchors must be shaped and dimensioned not only with regard to their own load bearing capacity but also with regard to a reliable force transfer into the concrete material. This is associated with an undesirably high effort and also requires a large installation space, which cannot always be provided readily. In order to make the bracing possible in the prior art, the two concrete parts to be connected must be exactly aligned with one another. Such an exact alignment of position and their retention, in particular before and during the bracing process, but also of the braced components with respect to one another, are quite difficult and difficult to achieve.

It is against this background that the present disclosure has been developed.

According to a first aspect, there is provided a connection system for connecting a first prefabricated concrete part with a second prefabricated concrete part, comprising a prefabricated connector and a connecting element, wherein the prefabricated connector comprises a base plate and at least one pouring-in anchor, which is connected to the base plate, the base plate being located in a base plane and having a through-opening for a connecting element, wherein the base plate and the at least one pouring-in anchor are formed as a one-piece sheet metal bending part, and wherein at least one pouring-in anchor '0 is bent outwards by an angle against the base plate from the base plane, wherein the cross section of the through-opening is larger than the cross-section of the connecting element, and in that the connecting system has positioning means for free positioning and positively locking the position of the connecting element passed through the through-opening in at least one direction lying in the base plane of the base plate, wherein a prefabricated connector is cast into the first prefabricated concrete part, and in that a receiving element for the connecting element is inserted into the opposite region of the adjoining second prefabricated concrete part, whereby the connecting element is inserted through the through-opening from a side of the base plate opposite the receiving element, and from there connected to the receiving element of the second prefabricated concrete part.

Weld seams are thus dispensed with, so that the original carrying capacity of the sheet material used can be fully utilized. By means of suitable bending radii, stress peaks are avoided. An improved mould composite can be produced between the pouring-in anchors and the surrounding concrete. An increased anchoring effect in the concrete can be achieved through partial surface pressing and undercut effect. The load bearing capacity thus increased allows the use of shorter pouring-in anchors, which reduces the space requirement.

It may be sufficient to arrange one or more pouring-in anchors only at one edge of the base plate. In an advantageous further development of the invention, at least one pouring-in anchor adjoins each other on two opposing edges of the base plate. In particular, the two aforementioned pouring-in anchors are disposed mirror-symmetrically with respect to a symmetric plane of the prefabricated connector. As a result of this, a symmetrical force is introduced into the base plate, comparable to a two-section connection, which contributes to relieving the design. Alternatively, or in combination with it, it may be expedient for at least one pouring-in anchor to be adjacent to at least two and in particular three edges, which are adjacent to one another by a corner. As a result, further possibilities for geometrical adaptation to the particular application are provided. For example, such designs can be useful for corner connections of prefabricated concrete parts. Furthermore, the carrying capacity can be increased.

The design of the prefabricated part connector as a sheet metal bending part enables a variety of shape adaptations to the respective application. In a preferred embodiment, at least one pouring-in anchor is designed as a frame element, which, in particular, forms a '0 closed surrounding frame together with the base plate. In case of less material use, the said frame produces a high anchoring effect in the concrete. In addition, the frame shape allows a nesting with further anchoring elements in the sheet plane so that the available sheet material can be optimally utilized. Alternatively or additionally, it may be expedient that at least one pouring-in anchor is designed as a strip element with a longitudinal beam and with a transverse beam. The anchoring effect of this construction has also proved to be particularly pronounced. In addition, the frame element and the strip element can be positively positioned one inside the other in the sheet material, so that only a small amount of sheet material and only a small installation space are required under full utilization of the anchoring effect.

In an advantageous aspect of the invention, such or other forms of pouring-in anchors, which are nested in a wound state on the base plane, are formed at different angles relative to the base plate from the base plane thereof. On the one hand, this favours a force application distributed over the volume of the adjacent concrete. On the other hand, such specifically optimized directions of the force can be applied, in order to be able to receive certain loads or combined load directions in an optimized manner.

In a further advantageous aspect of the invention, the connecting system comprises one of the inventive prefabricated connector elements as well as an associated connecting element, whereby the cross-section of the through-opening in the base plate is greater than the cross-section of the connecting element. In addition, the connecting system has positioning means for free positioning and for the positively locking position of the connecting element, which is passed through the through-opening, in the base plane of the base plate. This allows an exact relative positioning before and during the joining process, wherein a corresponding positive-locking position fixation of the two prefabricated concrete parts is reliably maintained next to one another after a fixed connection.

Various possibilities are conceivable for the configuration of the positive-locking position fixing. In a first preferred embodiment, said positioning means at least comprises a first eccentric ring, which is maintained rotatable relative to the base plate with the through opening around a rotational axis and can be fixed in a selected rotational angular position. The first eccentric ring has a positioning opening arranged eccentrically with respect to its axis of rotation for receiving and positioning the connecting element. By selecting a specific rotational angle of the eccentric ring, its positioning opening and thus also the interconnected connecting element can be brought into a certain desired relative position with respect to the prefabricated connector and thus with the assigned prefabricated concrete part. As soon as '0 the connecting element is tightened and the connecting point is loaded, a twisting of the eccentric ring is no longer possible due to the forces acting thereon. The connecting element reliably maintains its relative position to the prefabricated concrete part, as a result of which the two concrete prefabricated parts connected to one another also maintain their relative position to each other.

It may be sufficient to provide only such an eccentric ring at a connection point or at a prefabricated connector. In an advantageous development, however, the positioning means additionally comprise a second eccentric ring, which is pivoted in the through-opening of the base plate around a rotational axis and can be fixed in a selected rotational angular position, and which has an eccentrically arranged positioning port relative to its rotational axis. In this case, the abovementioned first eccentric ring is then flexibly accommodated, positioned and fixed in the selected rotational angular position in the eccentric positioning port of the second eccentric ring. In the unstressed state, both eccentric rings can be rotated relative to each other and also relative to the base plate, so that the positioning port of the first eccentric ring, which accommodates the connecting element, can be displaced and positioned as desired together with the connecting element in all directions of the plane of the base plate. In the base plane of the base plate, therefore, a two-dimensional positioning takes place, which is fixed under load while using only one eccentric ring. Together with the axial clamping, a three-dimensional, positive-locking positioning of the connecting element takes place relative to the cast prefabricated connector, which likewise entails relative positioning of the two prefabricated concrete parts relative to one another with a three-dimensionally positive locking.

As an alternative to the above-mentioned eccentric ring arrangement, it may be expedient that the positioning means comprise at least one latch plate, which has a positioning port for receiving and positioning the connecting element and is provided with locking teeth on at least one of its flat sides. In addition, the base plate also has at least one locking teeth corresponding to the locking teeth of the latching plate. In the unstressed state, the locking plate and, together with it, the inserted connecting element can be displaced and positioned as desired. Under load, that is to say in the stressed state of the connecting element, however, the latching means engages between the latching plate and the toothed base plate, so that a corresponding form locking occurs. For certain load cases, it may be sufficient to provide only one latch plate with locking teeth acting only in one direction. Preferably, however, the base plate is provided with two different locking teeth, which provide two different latching directions, which are particularly at right angles to one another. This can be a cross-teeth applied on one side. Preferably, however, the two different latching '0 notches are arranged on the two opposing flat sides of the base plate, whereby the positioning means comprise two latching plates, which are provided for abutment on the two opposite flat sides of the base plate. In any event, a form locking is produced in all directions of the base plane of the base plate.

In conjunction with the force transmission perpendicular to the base plane, as in the case of the eccentric rings described above, a three-dimensional, spatial form-fit between the connecting element and the prefabricated connector is produced, which likewise results in such a three-dimensional locking between the two interconnected prefabricated concrete parts.

In a further advantageous aspect of the invention, a connecting element is cast into the first prefabricated concrete part, while a receiving element for the connecting element is inserted into the opposite region of the adjoining second prefabricated concrete part. Preferably, the connecting element is a screw, while the receiving element is a threaded sleeve. The connecting element is inserted through the insertion-opening from a side of the base plate opposite the receiving element or the threaded sleeve and is connected with the receiving element or screwed into the threaded sleeve. As a result, it is possible to manage with only a single specimen of the prefabricated connector according to the invention at each connection point. In addition, the connecting element must be tightened only from one side, namely from the side of the first prefabricated concrete part, which receives the prefabricated connector. Thereby, the use of materials and the assembly effort are minimized.

Exemplary embodiments of the invention are described in more detail below with reference to the drawing.

Fig. 1 shows, in a schematic front view, two prefabricated concrete parts which are suggested, in which a prefabricated connector is cast in a first prefabricated concrete part, whereby a connecting element in the form of a screw is screwed into a threaded sleeve of the second concrete prefabricated part, and whereby the positioning means are used for positive locking of the position.

Fig. 2 is a perspective view of a first exemplary embodiment of the prefabricated connector according to FIG. 1 with two inserted eccentric rings for a form-fit relative positioning,

Fig. 3 is a perspective view of a further exemplary embodiment of the prefabricated '0 connector according to the invention with a latching plate and with latching teeth acting in one direction,

Fig. 4 shows a variant of the arrangement according to FIG. 3 with the latching direction rotated by 90

Fig. 5 is a perspective view of a development of the two embodiments according to Figs. 3 and 4 with a combination of latches acting in both directions, FIG.

Fig. 6 shows in a front view the prefabricated connector according to Fig. 5 with details of its geometrical configuration,

Fig. 7 is an enlarged sectional view of the details shown in Fig. 6 with VII.

Fig. 8 shows a variant of the arrangement according to Figs. 5 to 7 with pouring-in anchors in the form of combined frame and strip elements,

Fig. 9 shows the embodiment according to Fig. 8 with further strip elements,

Fig. 10 shows a further variant of the prefabricated connector according to the invention with nested frame elements,

Fig. 11 shows a variant of the arrangement according to Fig. 1 with prefabricated concrete parts, which are positioned and joined at an angle and

Fig. 12 shows a top view of a variant of the prefabricated connector according to Fig. 5 with a total of three pouring-in anchors adjacent to each other.

Fig. 1 shows a schematic front view of two concrete parts 1, 2 connected to one another in accordance with the invention. In the first prefabricated concrete part 1, a schematically indicated prefabricated connector 3 according to the invention is partially cast while maintaining a mounting trough 32. It may be expedient to also embed a prefabricated connector 3 similar to the first prefabricated concrete part 1 in the opposite second prefabricated concrete part 2. In the preferred embodiment shown, however, the connecting point or the connecting system used here comprises only a single prefabricated connector 3, which is inserted into the first prefabricated concrete part 1. Instead, a receiving element is used in the opposite prefabricated concrete part 2, which is embodied here as a threaded '0 sleeve 31.

The prefabricated connector 3 comprises a base plate 4 as well as at least one, in this case two, pouring-in anchors 5, which are connected to the base plate 4. The prefabricated part connector 3 is thus cast into the concrete material of the first prefabricated concrete part 1 in such a way that its pouring-in anchors 5 are completely and the base plate 4 section-wise enclosed by the concrete material adjacent to the two pouring-in anchors 5. A central section of the base plate 4 is free and bound in the direction of the adjacent second prefabricated concrete part 2 by the mounting recess 32, which is open towards the observer. A connecting element 7, which here is embodied as a screw with an exemplary hexagonally shaped screw head is inserted into the mounting trough 32 of the first prefabricated concrete part 1, and from the side of the base plate 4, which faces the adjacent second prefabricated concrete part 2 with the threaded sleeve 31 inserted therein, inserted through the base plate 4 of the prefabricated connector 3 and screwed into the threaded sleeve 31 of the second prefabricated concrete part 2.

The threaded sleeve 31 can be designed as a cast-in sleeve or bolt anchor. Alternatively, however, an anchor inserted into a suitable bore can also be considered. The threaded sleeve preferably has an internal thread for accommodating an external thread of the connecting element 7. However, a self-cutting receptacle can also be considered. Instead of the threaded sleeve 31, another receiving element for the connecting element 7 can be provided. For example, in the scope of the invention, it is conceivable that the connecting element 7 is designed not as a screw, but as a quick-action tensioning element, bayonet element or the like, wherein the aforementioned receiving element is then adapted to the configuration of the connecting element 7.

In addition, positioning means 13 are also provided as part of the connection system according to the invention, which are only schematically indicated here and are described in more detail below. They serve for free positioning and subsequent positive position fixing of the connecting element 7 relative to the base plate 4. As soon as the connecting element 7 is tightened on one side by means of a tool inserted into the mounting trough 32, the two concrete parts 1, 2 relative to one another are fixed not only in a force-locking manner but also in a form-fitting manner relative to one another.

Fig. 2 shows in a perspective view a first exemplary embodiment of the prefabricated connector 3 for the connection system according to Fig. 1. In the perspective view according to Fig. 2, it can be seen in conjunction with Fig. 1 that the base plate 4 has a through .0 opening 6 for the connecting element 7, but the cross-section of the through-opening 6 is considerably larger than the cross-section of the connecting element 7. This fact allows, initially within certain limits, a free relative positioning of the connecting element 7 (Fig. 1) relative to prefabricated connector 3 as follows: The positioning means 13 mentioned initially comprises at least one first eccentric ring 14 with a positioning opening 16 for accommodating and free, variable positioning of the connecting element 7 relative to the base plate 4 of the prefabricated connector 3. It may be appropriate to insert the first eccentric ring 14 directly into the through-opening 6 of the prefabricated-part connector 3. In the illustrated preferred embodiment, however, a second eccentric ring 17 with an associated positioning opening 19 is also provided. The arrangement is shown here in exploded view. In the assembled state, the second eccentric ring 17 is pivoted in the through-opening 6 of the base plate 4. The circular through-opening 6 has a hole axis 28, which in the assembled state predetermines an axis-parallel axis of rotation 18 of the second eccentric ring 17. It is also apparent that the positioning opening 19 of the second eccentric ring 17 is located eccentrically with an associated hole axis 30, thus with a radial distance from the axis of rotation 18.

The same applies to the first eccentric ring 14: This is pivoted in the positioning opening 19 of the second eccentric ring 17 in the mounted state. An associated axis of rotation 15 of the eccentric ring 14 is located parallel to the hole axis 30 of the positioning opening 19 in the second eccentric ring 17. The positioning opening 16 formed in the first eccentric ring 14 is located eccentrically with an associated hole axis 29, that is to say in the radial direction to the axis of rotation 15 of the first eccentric ring 14. Both eccentric rings 14, 17 can be rotated independent of one another relative to one another or relative to the base plate 4. This permits an arbitrary positioning of the positioning opening 16 and of the connecting element 7 (Fig. 1) held therein relative to the base plate 4 in the base plane E indicated in Figs. 6 and 9. From the summary view of Fig. 1 and 2, it is evident that the said relative positioning is also identical with a relative positioning of the two concrete parts 1, 2 relative to one another.

Moreover, it becomes clear that in the tightened state of the connecting element 7, a relative displacement is no longer possible. It is evident from Fig. 2 that the first eccentric ring 14 with a flange rests on the surface of the second eccentric ring 17, while the second eccentric ring 17 with a flange rests on the surface of the base plate 4. As a result of the axial clamping of the connecting element 7, a sufficiently large surface pressure is produced, as a result of which twisting is no longer possible. If the two concrete parts 1, 2 still apply loads in the base plane E of the base plate 4, this also leads to corresponding surface pressures '0 on the circumferential surfaces of the two eccentric rings 14, 17, which prevents twisting. The fixed connecting element 7 is positively held in the positioning opening 16 of the first eccentric ring 14 and is held in a three-dimensional manner, i.e. in all spatial directions positively and in combination therewith also non-positively relative to the prefabricated connecter 3. As a result, the two prefabricated concrete parts 1, 2 are also fixed in position in the same way in a positive and non-positive manner. However, it may also be appropriate to provide a positive locking in the direction of rotation between the eccentric rings 14, 17 and also relative to the base plate. In this case, a pure positive locking acting in all directions is formed.

A further feature according to the invention of the prefabricated connector 3 shown in Fig. 2 relates to the embodiment of at least one, here the two pouring-in anchors 5. These are formed together with the base plate 4 as a one-piece sheet metal bending part, for which further details will be described below. In the exemplary embodiment according to Fig. 2, the two pouring-in anchors are designed as a frame element 8, which together with the base plate 4 form a closed circumferential frame. Instead of the prefabricated connector 3 shown in Fig. 2, however, other prefabricated connector elements according to the invention can also be used, in particular, in the embodiment forms according to Fig. 3 to 10, in the connection system according to Fig. 1.

Fig. 3 shows a perspective view of a further exemplary embodiment of a prefabricated connector 3 according to the invention. Here too, the cross-section of the through-opening 6 is significantly larger than the cross-section of the connecting element 7 shown in Fig. 1. Unlike the embodiment shown in Fig. 2, the positively locking positioning means 13 are not formed by eccentric rings but by a combination of a latching plate 20 with the base plate 4. The locking plate 20 is provided with a positioning opening 16 for at least approximately clearance-free reception of the connecting element 7 according to Fig. 1. The arrangement is shown here in exploded view. During assembly, the latching plate 20 is placed on the upper side of the base plate 4 corresponding to an arrow 33. On its flat side facing the assembled state of the base plate 4, the latching plate 20 is provided with a latching teeth 21, while the base plate 4 carries, on its surface facing the latching plate 20, a latching teeth 22 corresponding thereto. In the exemplary embodiment shown, the two latching teeth 21, 22 are formed by parallel ribs which extend transversely between the two pouring-in anchors 5 in the exemplary embodiment shown and are thus running perpendicularly thereto, that is to say in the direction from the pouring-in anchor 5 to the opposite pouring-in anchor 5, a detent direction indicated by a double arrow 24. As long as the connecting element 7 '0 according to Fig. 1 is still not clamped, a latching relative positioning of the functional unit from the connecting element 7 and the latching plate 20 relative to the prefabricated part connector 3 can be performed. As soon as the connecting element 7 is tightened, a form-fit occurs at least in the axial direction of the connecting element 7 and in the latching direction 24, whereas a force-fit occurs at least perpendicularly to the latching direction 24 as a result of the acting clamping forces.

Fig. 4 shows a variant of the arrangement according to Fig. 3, whereby the directions of the latching teeth 21, 22 are rotated by 90 0 in comparison with the exemplary embodiment according to Fig. 3. Accordingly, a latching direction 25 appears which is perpendicular to the latching direction 24 according to Fig. 3. Overall, it is evident that a more or less arbitrary latching direction 24, 25 can be set by means of a directional specification of the latching teeth 21, 22, as a result of which an adaptation to the forces acting on the two concrete parts 1, 2 (Fig. 1) is possible.

Fig. 5 shows a variant of the two embodiments according to Fig. 3 and 4, wherein a total of two identical locking plates 20 are used. In the mounted state, one locking plate 20 rests on the two opposite flat sides of the base plate 4. Two latching teeth 22, 23 are formed on the two opposing flat sides of the base plate 4, which differ from one another in the case of otherwise identical geometries in that they provide two different latching directions 24, 25, which lie at right angles to each other. As a result of the different latching directions 24, 25, which mutually complement each other, a three-dimensional positional fixing of the connecting element 7 (FIG. 1) acting relative to the prefabricated connector 3 takes place in all spatial directions, which in the tightened state also leads to such a three-dimensional positive locking of position of the two assembled prefabricated concrete parts 1, 2.

Fig. 6 shows the prefabricated connector 3 according to Fig. 5 in a front view. The different orientation of the two latching teeth 22, 23 can also be seen here. Fig. 6 shows a detail VII, which is shown in an enlarged view in Fig. 7. It can be seen here that the latching teeth 4 is formed in the surface of the base plate 4 by ribs, which are saw tooth-shaped in cross section. An angle in a range of 600 to 90 is preferably used as an opening angle between the flanks of the saw tooth-like triangular cross sections. However, other opening angles may also be used. The same applies logically to all latching teeth 21, 22, 23 of the exemplary embodiments according to Figs. 3 to 10.

Furthermore, it can also be seen in Fig. 6 that the base plate 4 of the prefabricated connector 3 lies in a base plane E. At least one pouring-in anchor 5, in this case both '0 pouring-in anchors 5, are bent out of the base plane E by an angle a from the base plate 4, which likewise applies to the remaining exemplary embodiments. The angle a is preferably in a range from 0° to 120° and appropriately in a range from 30° to 90°. In the exemplary embodiment shown, the angle a is about 60°. In order to avoid stress peaks, the pouring-in anchors 5 are not angled sharp-edged with respect to the base plate 4, but are bent with a bending radius. Besides that, it can also be seen in Fig. 6 that the prefabricated connector 3 has a symmetrical plane S, whereby the pouring-in anchors 5 are arranged mirror-symmetrical to the symmetric plane S.

Unless expressly mentioned otherwise, the exemplary embodiments according to Figs. 1 to 7 correspond to one another in the remaining features and reference symbols.

Fig. 8 shows a perspective view of a further exemplary embodiment of a prefabricated connector 3 according to the invention, wherein at least one pouring-in anchor 5, in this case two mirror-symmetrically opposite pouring-in anchors 5 are formed as strip elements 10 each having a longitudinal carrier 11 and an outer side adjoining transverse beams 12. Further, Fig. 8 shows that the base plate 4 has two opposing edges 21, 22, and that in each case at least one of the two edges 26, 27, here in each case two adjacent pouring-in anchors 5 adjoin each of the two edges 26, 27. In the exemplary embodiment shown, a pouring-in anchor 5 embodied as a frame element 8 and one pouring-in anchor 5 embodied as a strip element 10 adjoin one of the two edges 26, 27, respectively.

Fig. 9 shows the arrangement according to Fig. 8, wherein the two pouring-in anchors 5 formed as strip element 10 are bent out of the base plane E by an angle P from the base plate 4. According to Fig. 8, however, the strip elements 10 can also be provided without such an inflection. In any case, the angle P preferably lies in a range of > 0° to < 900 and is approximately 30° in the exemplary embodiment according to Fig. 9. In the two cases of Fig. 8 and 9, however, the pouring-in anchors 5 designed as frame elements 8 are shaped as shown in FIG. 6 by an angle a. Preferably, the two angles a, P should be different.

A further variant of the prefabricated connector 3 according to the invention is shown in the perspective view according to Fig. 10. In accordance with the exemplary embodiments according to Fig. 8 and 9, two pouring-in anchors 5 each adjoin one of the two opposing edges 21, 22 of the base plate 4. In this case, however, all the pouring-in anchors 5 are designed as frame elements 8, 9, which form each a closed frame. The angle a of the outer frame elements 9 in Fig. 7 here is 0°, while the angle P of the inner frame elements 9 is approximately 60. However, in this exemplary embodiment as well, the angles a, P, which '0 have been mentioned above, apply to the ranges considered.

A common feature of the exemplary embodiments according to Fig. 8 to 10 is the fact that several pouring-in anchors 5 adjoining one of the two edges 26, 27 are located at different angles a, P relative to the base plane E, and that they are interleaved in a state developed on the base plane E, i.e., before the bending process of the originally planar sheet. In spite of the large number of the pouring-in anchors 5 present, this makes possible a completely one-part design of sheet metal exclusively by means of punching and bending or forming without the need to use joining techniques such as welding or the like.

Furthermore, it can be seen that the exemplary embodiments according to Fig. 8 to 10 have latching teeth according to the exemplary embodiments according to Fig. 3 to 7. Instead of these latching teeth, however, one or more eccentric rings can also be used here in accordance with the exemplary embodiment according to Fig. 2.

Fig. 11 shows a variant of the arrangement according to Fig. 1 in a schematic perspective view. The two concrete parts 1, 2 are not arranged here in a common plane as in Fig. 1, but rather in the form of a corner, in an angle deviating from 0 and 180 positioned relative to one another and connected to each other. The angle between the planes of the two concrete parts 1, 2 is here, for example, 90. In the exemplary embodiment shown, the two concrete parts 1, 2 adjoin each other in the region of two adjacent longitudinal edges, so that a corner connection is formed. However, a T-connection is also possible, in which the one prefabricated concrete part 1, 2 abuts with its associated edge against a middle region of the respective other prefabricated concrete part 2, 1. In any case, according to the representation in Fig. 11, the concrete prefabricated part 1, in which the prefabricated connector 3 is cast, abuts with its associated flat side against an end face of the further prefabricated concrete part 2 at the edge, in which the receiving element, here the threaded sleeve 31, is held. This presupposes that the prefabricated connector 3 is rotated by 90° with respect to Fig. 1, that the axis of the connecting element 7 is not perpendicular to the plane of the first prefabricated concrete part 1, as in Fig. 1. It is, of course, also possible within the scope of the invention to leave the prefabricated connector 3 and the axis of the connecting element in the orientation corresponding to Fig. 1 in the case of an angle connection comparable to Fig. 11, in which case the receiving element, here the threaded sleeve 31, is to be arranged at an angle corresponding to the plane of the associated prefabricated concrete part 2.

Fig. 12 shows a top view of a variant of the prefabricated connector according to Fig. 5. It '0 can be seen that, as in the other exemplary embodiments, the base plate 4 has a rectangular, in this case a square base surface, which is limited by a total of four edges 26, 27, 34, 35. An edge 26 is adjoins with two edges 34, 35 over the corner. In other words, the two edges 34, 35 adjoin the edge 26 in the plane of the base plate 4 at a respective common corner. Similarly, the same holds good for the edge 27 with the edges 34, 35 adjacent to the corner. In an optionally possible embodiment of the invention, at least one of these adjacent edges 26, 27, 34 adjoins at least one pouring-in anchor 5. In the exemplary embodiment according to Fig. 12, at least one, in this case exactly one pouring-in anchor 5, adjoins a total of three edges 26, 27, 34. The same applies to the possible number and design of the pouring-in anchors 5, including their bending angles, as described in the other embodiments. In addition, it can be seen that a symmetry plane S runs through the middle pouring-in anchor 5, which adjoins the edge 34, to which the prefabricated connector 3 is formed mirror-symmetrical.

The embodiment of the prefabricated connector 3 shown or described here can preferably be used in corner connections according to Fig. 11, but is also suitable for connections lying in one plane according to Fig. 1. The arrangement of pouring-in anchors 5 at a total of three edges 26, 27 & 34 of the base plate 4 leads to a further increase in the load bearing capacity.

Further, unless it is expressly described or illustrated differently, it applies to the exemplary embodiments shown in Fig. 8 to 12 that they correspond to one another in the remaining features and reference symbols, as well as with the exemplary embodiments according to Fig. 1 to 7.

Advantageously, the present disclosure provides a connecting system for joining prefabricated concrete parts, which, in addition to an improved force introduction, also enables reliable positioning of the two concrete parts against one another, and a prefabricated connector providing an improved force transmission.

The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that such prior art forms part of the common general knowledge.

It will be understood that the terms "comprise" and "include" and any of their derivatives (e.g. comprises, comprising, includes, including) as used in this specification, and the claims that '0 follow, is to be taken to be inclusive of features to which the term refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.

In some cases, a single embodiment may, for succinctness and/or to assist in understanding the scope of the disclosure, combine multiple features. It is to be understood that in such a case, these multiple features may be provided separately (in separate embodiments), or in any other suitable combination. Alternatively, where separate features are described in separate embodiments, these separate features may be combined into a single embodiment unless otherwise stated or implied. This also applies to the claims which can be recombined in any combination. That is a claim may be amended to include a feature defined in any other claim. Further a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of: a, b, or c" is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c.

It will be appreciated by those skilled in the art that the disclosure is not restricted in its use to the particular application or applications described. Neither is the present disclosure restricted in its preferred embodiment with regard to the particular elements and/or features described or depicted herein. It will be appreciated that the disclosure is not limited to the embodiment or embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope as set forth and defined by the following claims.

Claims

1. A connection system for connecting a first prefabricated concrete part with a second prefabricated concrete part, comprising a prefabricated connector and a connecting element, wherein the prefabricated connector comprises a base plate and at least one pouring-in anchor, which is connected to the base plate, the base plate being located in a base plane and having a through-opening for a connecting element, wherein the base plate and the at least one pouring-in anchor are formed as a one-piece sheet metal bending part, and wherein at least one pouring-in anchor is bent outwards by an angle (a, P) against the base plate from the base plane, wherein the cross section of the through-opening is larger than the cross section of the connecting element, and in that the connecting system has positioning means for free positioning and positively locking the position of the connecting element passed through the through-opening in at least one direction lying in the base plane of the base plate, wherein the prefabricated connector is cast into the first prefabricated concrete part, and in that a receiving element for the connecting element is inserted into the opposite region of the adjoining second prefabricated concrete part, whereby the connecting element is inserted through the through-opening from a side of the base plate opposite the receiving element, and from there connected to the receiving element of the second prefabricated concrete part.

2. The connection system according to claim 1, wherein the positioning means comprise a first eccentric ring, which is rotatable around an axis of rotation relative to the base plate with the through-opening and can be fixed in a selected rotational angular position, and which has an eccentrically arranged positioning opening with respect to its axis of rotation for receiving and positioning the connecting element.

3. The connection system according to claim 2, wherein the positioning means comprise a second eccentric ring, which is pivoted around an axis of rotation in the through-opening of the base plate and can be fixed in a selected rotational angular position, and which has an eccentrically arranged position opening with respect to its axis of rotation, in which the first eccentric ring is pivoted around its axis of rotation and can be fixed in a selected rotational angular position.

4. The connection system according to claim 1, wherein the positioning means comprise at least one latching plate , which has a positioning opening for the reception and positioning of the connecting element, and is provided with a latching teeth on at least one of its flat sides and that the base plate has at least one latching teeth corresponding to the latching teeth of the latching plate.

5. The connection system according to claim 4, wherein the latching teeth are designed in such a way that they provide two different latching directions.

6. The connection system according to claim 5, wherein the latching directions are at a right angle to each other.

7. The connection system according to claim 5, wherein the two different latching teeth are arranged with different latching directions on the two opposite flat sides of the base plate, and the positioning means comprise two latching plates provided for mounting at the both opposing flat sides of the base plate.

8. The connection system according to claim 1, wherein the connecting element is a screw, and in that the receiving element inserted into the second prefabricated concrete part is a threaded sleeve ,

whereby the screw supported by a side of the base plate opposite to the threaded sleeve is inserted through the through-hole and is screwed into the threaded sleeve.

9. The connection system according to claim 1, wherein the base plate has two opposing edges, and that at least one pouring in anchor adjoins each of the two opposing edges.

10. The connection system according to claim 1, wherein the base plate has edges, and at least one pouring-in anchor adjoins at least two edges.

11. The connection system according to claim 10, wherein at least one pouring-in anchor in each case adjoins at least three edges, which are adjacent to each other.

12. The connection system according to claim 9, wherein the prefabricated connector has a symmetric plane, and that the pouring-in anchors are arranged symmetrical to the plane of symmetry.

13. The connection system according to claim 1, wherein at least one pouring-in anchor is designed as a frame element which forms a closed surrounding frame.

14. The connection system according to claim 13, wherein the frame element, together with the base plate, forms a closed surrounding frame.

15. The connection system according to claim 1, wherein at least one pouring-in anchor is designed as a strip element with a longitudinal beam and with a transverse beam.

16. The connection system according to claim 1, wherein the base plate has edges, and that at least one of the edges adjoins a plurality of pouring-in anchors, which are nested in a wound state on the base plane, and which are bent at different angles from the base plane in relation to the base plate.