EP3519641B1 - Connecting device for connecting thin prefab elements, prefab elements therewith equipped, method for making such thin prefab elements equipped with such connecting device - Google Patents

Description

The invention relates to a connecting device for connecting thin-walled prefabricated parts made of a cast and curable material, the connecting device having at least one connecting element.

The invention also relates to thin-walled prefabricated parts with connecting devices.

Prefabricated parts made of a pourable and hardenable material, for example concrete, have the advantage that they can be manufactured in the prefabricated part plant with very high production accuracy, in very good quality and regardless of the weather. Non-rusting reinforcements, such as fine-grained stainless steel reinforcement or fine-grained textile reinforcement elements made of carbon, alkali-resistant glass fibers or basalt fibers, allow the concrete cover to be reduced and thus a reduction in the component thickness, which enables the building material to be used in a resource-efficient manner. Prefabricated parts manufactured in the precast plant are then delivered to the construction site and assembled to form building structures. A particular challenge is the connection of such thin-walled prefabricated parts.

Reinforced grouting joints are often used to connect thin-walled prefabricated parts, which in practical application have proven to be reliable in terms of mechanical strength. However, it is disadvantageous that another grouting process, i.e. additional formwork and grouting mortar, is required on the construction site. This leads to further work steps and costs that weaken the potential of precast construction.

On the other hand, systems for connecting thin-walled prefabricated parts have been developed which are either not adapted to the thin-walled prefabricated parts or have proven to be unsuitable in practical use. In the case of adhesive connections, for example, the problem is that the joints cannot be reinforced. The performance of adhesive joints depends heavily on the preparation of the substrate, the processing conditions and the processing. As a result, high levels of safety are required and the performance of the thin-walled prefabricated parts cannot be fully utilized.

The connection of thin-walled prefabricated parts, which are based on built-in parts made of different materials, predominantly metal or fiber-reinforced plastics, for example made of carbon, alkali-resistant glass fibers or basalt fibers, has the advantage that these materials can already be installed in the precast plant and can be quickly installed on the Enable construction site. However, the systems developed to date are either not suitable for thin-walled prefabricated parts or are not yet fully developed for practical use.

The documents DE 198 35 900 A1 and DE 10 2012 223 279 A1 each disclose connecting devices for connecting prefabricated walls. In this case, parts of the connecting devices are poured into the precast wall, the connecting devices being located in recesses in the precast walls. These connecting devices have the disadvantages that they are not suitable for thin-walled prefabricated parts and that the joints and recesses remaining after the connection must also be cast.

The document U.S. 2,142,305 A discloses a connector according to the preamble of claim 1 and claim 20.

The invention is based on the object of providing a connecting device for connecting thin-walled prefabricated parts made of a pourable and curable material, in which the number of work steps and the effort on the construction site are reduced.

According to the invention, this object is achieved by a connecting device for connecting thin-walled prefabricated parts made of a pourable and curable material according to claim 1 and claim 20.

If the connecting device according to the invention is already built into the thin-walled prefabricated parts in the precast plant, these can be connected quickly and easily on the construction site, with no additional formwork or subsequent potting being required.

Since the edge protection element, the anchor element and the connecting element are formed in one piece, the manufacture of the connecting device according to the invention is simplified and the load transfer and transfer is improved.

The connecting element and the anchor element expediently extend essentially parallel to one another. The connecting device can be made very flat, which is advantageous for thin-walled prefabricated parts. In addition, tensile and compressive forces occurring in parallel are diverted along the connecting element and / or the anchor element.

The anchor element has toothed elements, the toothed elements extending transversely, preferably essentially orthogonally, from the anchor element. Since, for example, thin-walled concrete is particularly sensitive to punctual loads, this advantageously enables uniform load introduction of the connecting device into the thin-walled prefabricated part.

According to the invention, the anchor element is formed from two plates, which are essentially parallel to one another, and the toothed elements, the plates extending in the same direction from opposite edges of the edge protection element. This advantageously partially or completely protects the end face and the surfaces of the prefabricated part against which the edge protection element rests.

According to the invention, the anchor element is formed from a plurality of elongate elements which extend from the edge protection element. The elongate elements advantageously extend in several, preferably essentially parallel, planes from the edge protection element, as a result of which the load introduction into the thin-walled prefabricated part is particularly uniform.

In addition, the end face and the surfaces of the prefabricated part against which the edge protection element rests are partially or completely protected.

The anchor element expediently has a cuboid installation volume, the ratio of the height of the installation volume to the width of the installation volume and / or of the height of the installation volume to the length of the installation volume being at most 10 to 100, preferably at most 5 to 100. This has the advantage that the connecting device according to the invention is particularly suitable for thin-walled finished parts.

The edge protection element expediently has a length which is at least five times, preferably at least ten times, the height of the edge protection element.

In a preferred embodiment, the connecting element is designed as an angle profile with a first leg, which extends from the edge protection element, and a second leg, which is essentially parallel to the edge protection element. This provides a connecting device which can advantageously be subjected to pressure and which aligns itself automatically when the finished parts are connected.

In an alternative preferred embodiment, the connecting element is designed as an elastically deformable hook element. This provides a connecting device which can advantageously be subjected to tensile loads and which aligns itself automatically when the finished parts are connected.

In an alternative preferred embodiment, the connecting devices consists of a set of two connecting devices, the connecting element of the first connecting device being formed from two plates that are substantially parallel to one another and the connecting element of the second connecting component comprising a plate which can be inserted between the plates of the first connecting device and which is preferably of the same length as the plates of the first connecting device. This provides a connecting device which can advantageously be subjected to pressure and which aligns itself automatically when the finished parts are connected.

In an alternative preferred embodiment, the connecting device comprises a set of two connecting devices, wherein the connecting element of the first connecting device comprises a slot-shaped recess, and wherein the connecting element of the second connecting component comprises a plate which can be inserted into the slot-shaped recess of the first connecting device and which preferably has the same length as the slot-shaped recess. This provides a connecting device which can advantageously be subjected to pressure and which aligns itself automatically when the finished parts are connected. Furthermore, the advantage is retained that the prefabricated parts can be connected to one another completely without joints and flush.

Alternatively, the edge protection element of the second connecting device is designed as an angle profile. In this way, a corner connection of two connecting devices or prefabricated parts can advantageously be provided.

In an alternative preferred embodiment, the connecting device comprises a set of two connecting devices, the connecting element of the first connecting device being designed as an angle profile with a first leg that extends from the edge protection element and a second leg that is essentially parallel to the edge protection element, and wherein the connecting element of the second connecting device is designed as a square hollow profile with a groove between the hollow profile and the edge protection element that is essentially parallel to the edge protection element, the depth of the groove and the length of the second leg preferably being the same. This provides a connection device which can advantageously be subjected to compression and tension and which aligns itself automatically when the finished parts are connected. Furthermore, the advantage is retained that the prefabricated parts can be connected to one another without any joints.

Alternatively, the connecting element of the second connecting device is designed as a square hollow profile with a groove that is essentially orthogonal to the edge protection element and is open on one side. In this way, a corner connection of two connecting devices or prefabricated parts can advantageously be provided.

The connecting element expediently has at least one opening for a connecting means. In this way, a connecting device can be provided which can advantageously be subjected to tension and compression and, to a certain extent, to bending. Thus, two connecting devices according to the invention can advantageously form a form-fitting and force-fitting connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

A thin-walled prefabricated part made of a pourable and curable material is expediently provided which already has at least one connecting device according to the invention, the thin-walled prefabricated part having a thickness in the region of half a thickness Centimeters to twelve centimeters, preferably in the range of one centimeter to four centimeters. The prefabricated parts according to the invention can be delivered directly to the construction site and connected there quickly and easily.

In a preferred embodiment, a height of the edge protection element of the connecting device corresponds at least to the thickness of the prefabricated part in the region of an end face of the prefabricated part against which the edge protection element rests. This advantageously protects the entire height of the end face of the prefabricated part and the connecting means of the adjoining prefabricated part can rest directly on the edge protection element.

In a particularly preferred embodiment, the edge protection element of the connecting device is made in one piece and lies completely along the end face. This advantageously protects the entire height and the entire length of the end face of the prefabricated part and the connecting means of the adjoining prefabricated part can bear directly on the edge protection element over the entire length of the end face. The connecting device with such an edge protection element expediently forms part of a formwork for producing the thin-walled prefabricated part. This advantageously simplifies a method for producing the thin-walled finished part.

The anchor element is expediently completely cast into the prefabricated part. This enables thin-walled finished parts with flat surfaces to be produced.

The prefabricated part is expediently made of concrete, ice or plastic. These materials can be poured and cured particularly well.

Fig. 1

in einer perspektivischen Ansicht eine Verbindungsvorrichtung gemäß einem ersten nicht erfindungsgemäßen Ausführungsbeispiel;

Fig. 2

in einer perspektivischen Ansicht die Verbindungsvorrichtung gemäß Fig. 1;

Fig. 3

in einer perspektivischen Ansicht die Verbindungsvorrichtung gemäß Fig. 2, wobei die Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 4A

in einem Querschnitt zwei Verbindungsvorrichtungen gemäß Fig. 3 in gelöstem Zustand;

Fig. 4B

in einem Querschnitt zwei Verbindungsvorrichtungen gemäß Fig. 3 in verbundenem Zustand;

Fig. 5

in einer perspektivischen Ansicht eine Verbindungsvorrichtung gemäß einem zweiten nicht erfindungsgemäßen Ausführungsbeispiel;

Fig. 6

in einer perspektivischen Ansicht zwei Verbindungsvorrichtungen gemäß Fig. 5 in verbundenem Zustand, wobei jede Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 7

in einer perspektivischen Ansicht ein Set aus zwei Verbindungsvorrichtungen gemäß einem dritten nicht erfindungsgemäßen Ausführungsbeispiel in gelöstem Zustand;

Fig. 8

in einer perspektivischen Ansicht die Verbindungsvorrichtungen gemäß Fig. 7, wobei jede Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 9

in einer perspektivischen Ansicht die Verbindungsvorrichtungen gemäß Fig. 7 in verbundenem Zustand;

Fig. 10

in einer perspektivischen Ansicht die Verbindungsvorrichtungen gemäß Fig. 9, wobei jede Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 11

in einer perspektivischen Ansicht ein Set aus zwei Verbindungsvorrichtungen gemäß einem erfindungsgemäßen Ausführungsbeispiel in gelöstem Zustand;

Fig. 12

in einer perspektivischen Ansicht die Verbindungsvorrichtungen gemäß Fig. 11, wobei jede Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 13A

in einem Querschnitt ein Set aus zwei Verbindungsvorrichtungen gemäß einem fünften nicht erfindungsgemäßen Ausführungsbeispiel in gelöstem Zustand;

Fig. 13B

in einem Querschnitt das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 13A in verbundenem Zustand;

Fig. 14A

in einem Querschnitt das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 13A und ausgebildet als Eckverbindung;

Fig. 14B

in einem Querschnitt das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 13B und ausgebildet als Eckverbindung;

Fig. 15

in einer perspektivischen Ansicht ein Set aus zwei Verbindungsvorrichtungen gemäß einem sechsten nicht erfindungsgemäßen Ausführungsbeispiel in gelöstem Zustand;

Fig. 16

in einer perspektivischen Ansicht das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 15 in verbundenem Zustand, wobei jede Verbindungsvorrichtung in ein dünnwandiges Fertigteil eingegossen ist;

Fig. 17

in einem Querschnitt das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 16;

Fig. 18

in einem Querschnitt das Set aus zwei Verbindungsvorrichtungen gemäß Fig. 16 und ausgebildet als Eckverbindung.

Show in the schematic drawings

Fig. 1

in a perspective view a connecting device according to a first embodiment not according to the invention;

Fig. 2

in a perspective view the connecting device according to Fig. 1 ;

Fig. 3

in a perspective view the connecting device according to Fig. 2 , wherein the connecting device is cast in a thin-walled prefabricated part;

Figure 4A

in a cross section two connecting devices according to Fig. 3 in the dissolved state;

Figure 4B

in a cross section two connecting devices according to Fig. 3 in connected state;

Fig. 5

in a perspective view a connecting device according to a second embodiment not according to the invention;

Fig. 6

in a perspective view two connecting devices according to Fig. 5 in the connected state, each connecting device being cast into a thin-walled prefabricated part;

Fig. 7

in a perspective view a set of two connecting devices according to a third embodiment not according to the invention in the released state;

Fig. 8

in a perspective view the connecting devices according to FIG Fig. 7 wherein each connecting device is cast in a thin-walled prefabricated part;

Fig. 9

in a perspective view the connecting devices according to FIG Fig. 7 in connected state;

Fig. 10

in a perspective view the connecting devices according to FIG Fig. 9 wherein each connecting device is cast in a thin-walled prefabricated part;

Fig. 11

in a perspective view a set of two connecting devices according to an embodiment of the invention in the released state;

Fig. 12

in a perspective view the connecting devices according to FIG Fig. 11 wherein each connecting device is cast in a thin-walled prefabricated part;

Figure 13A

in a cross section a set of two connecting devices according to a fifth embodiment not according to the invention in the released state;

Figure 13B

in a cross section the set of two connecting devices according to Figure 13A in connected state;

Figure 14A

in a cross section the set of two connecting devices according to Figure 13A and designed as a corner connection;

Figure 14B

in a cross section the set of two connecting devices according to Figure 13B and designed as a corner connection;

Fig. 15

in a perspective view a set of two connecting devices according to a sixth exemplary embodiment not according to the invention in the released state;

Fig. 16

in a perspective view the set of two connecting devices according to Fig. 15 in the connected state, each connecting device being cast into a thin-walled prefabricated part;

Fig. 17

in a cross section the set of two connecting devices according to Fig. 16 ;

Fig. 18

in a cross section the set of two connecting devices according to Fig. 16 and designed as a corner connection.

In the following, a connection device 1 is shown in six different configurations on the basis of FIG Figures 1 to 18 described in more detail. Only the embodiment of the Figures 11 and 12 shows a connecting device according to the invention. Similar or identical elements of different configurations, which elements essentially perform the same technical function, are denoted by the same reference numbers or replaced by more specific elements with specific reference numbers. Individual elements of an embodiment can be exchanged or combined with other elements of other embodiments, provided that they make technical sense.

Figure 1 shows the connecting device 1 according to a first, not according to the invention, embodiment. The connecting device 1 has an edge protection element 2. Furthermore, the connecting device 1 has a connecting element 3, which extends from the edge protection element 2, and an anchor element 4, which also extends from the edge protection element 2. The connecting element 3 and the anchor element 4 are formed in one piece from two substantially parallel plates 5 and in one piece with the edge protection element 2, the plate 5 of the connecting element 3 having the shape of an angle profile. The panels 5 extend from a central region 6 and from opposite sides 7 of the edge protection element 2 essentially within the same plane. The plates 5 are essentially orthogonal to the edge protection element 2. This embodiment is advantageous if forces, in particular tensile forces or compressive forces, are to be transmitted in the direction of the connecting element 3 and / or the anchor element 4 or essentially parallel thereto. The connecting element 3 has openings 8 for a connecting means. The anchor element 4 has toothed elements 9 which extend essentially orthogonally from the anchor element 4. Alternatively, the toothed elements 9 can also extend transversely from the anchor element 4.

Alternatively, the connecting element 3 and the anchor element 4 can extend essentially orthogonally onto the edge protection element 2 in different parallel planes.

Alternatively, the connecting element 3 and the anchor element 4 can extend from opposite sides 7 of the edge protection element 2 transversely onto the edge protection element 2 and essentially within the same plane. This can be advantageous if the forces to be transmitted primarily run transversely to the edge protection element 2, in the direction of the connecting element 3 and / or the anchor element 4 or essentially parallel thereto.

Alternatively, the connecting element 3 and the anchor element 4 can extend essentially orthogonally to one another, for example in the case of a corner connection of two connecting devices 1, which is described in more detail below.

It is also conceivable that the connecting element 3 and the anchor element 4 extend in different directions, both of which lead away from the same side 7 of the edge protection element 2, for example when a connection between two connecting devices 1 is at an acute angle, i.e. an angle that is less than 90 degrees should be made possible.

Figure 2 shows the connecting device 1 according to the first embodiment, the plate 5 of the connecting element 3 as compared to FIG Figure 1 mirrored angle profile is executed and the toothed elements 9 additionally have dowel end anchors 10. These have the advantage that possible transverse tensile stresses generated by the connecting element 3, which can lead to splitting of the cast and curable material 12, can be absorbed and thus prevent splitting. Will, as in Figure 3 shown, the connecting device 1 with the anchor element 4 cast in a thin-walled prefabricated part 11 made of a castable and curable material 12, the dowel end anchors 10 form a flush finish with the surface 18 of the prefabricated part 11. The toothed elements 9 are thus cast flush into the prefabricated part 11 . The number of toothed elements 9 introduced at regular intervals, for example 5 to 20 centimeters, advantageously reduces peak stresses within the finished part 11.

Alternatively, the toothed elements 9 and / or the dowel end anchors 10 can also be completely cast into the prefabricated part 11, the toothed elements 9 and / or the dowel end anchors 10 not being visible. In this way, thin-walled finished parts 11 with flat surfaces 18 can be produced. Alternatively, the toothed elements 9 can also be partially cast into the prefabricated part 11, each toothed element 9 having a protrusion. As a result, the toothed elements 9 can be manipulated from the outside or serve as a decorative element.

According to the first exemplary embodiment, the connecting element 3 is designed as an angle profile with a first leg 15 and a second leg 16, which is essentially parallel to the edge protection element 2. The edge protection element 2 is formed in one piece along an entire length 19 of the prefabricated part 11 and lies completely against the prefabricated part 11 along an end face 13 of the prefabricated part 11. The height of the edge protection element 2 corresponds to the thickness 17 of the prefabricated part 11. The entire end face 13 of the prefabricated part 11 is thus advantageously protected by the edge protection element 2.

Are now according to Figure 4A two thin-walled prefabricated parts 11, in which a connecting device 1 is integrated, in particular cast, aligned along their end faces 13, can according to FIG Figure 4B be connected to each other. Here, the two prefabricated parts 11 are rotated by 180 degrees to one another or the connecting devices 1 are integrated mirror-inverted, in particular cast. When the two prefabricated parts 11 are brought together, the first legs 15 of the two connecting elements 3 overlap and the second legs 16 automatically align themselves with the edge protection elements 2 of the respective other connection device 1 and, when connected, lie against these edge protection elements 2. Furthermore, in the connected state, the openings 8 of the connecting elements 3 are connected to connecting means 14, for example screw connections. The two connecting devices 1 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 thus form a form-fitting and non-positive connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

Alternatively, the connecting elements 3 have no openings 8 and are not connected to connecting centers 14. The two connecting devices 1 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 then form a form-fitting connection for the transmission of compressive forces.

Alternatively, the edge protection element 2 does not lie completely along the end face 13 of the prefabricated part 11 and / or its height does not fully correspond to the thickness 17 of the prefabricated part 11. In this case, in the connected state, the second legs 16 of the two connecting elements 3 may partially lie on the edge protection elements 2 and / or partially on the end faces 13 of the finished parts 11.

The Figures 5 and 6 show a connecting device 20 according to a second embodiment not according to the invention. The second embodiment is essentially the same as the first embodiment, with the difference that the connecting element 3 is designed as an elastically deformable hook element 21.

Two thin-walled prefabricated parts 11 into which a connecting device 20 is integrated, in particular cast, can according to FIG Figure 6 are connected to one another along their end faces 13. In this case, the two prefabricated parts 11 are rotated by 180 angular degrees to one another or the connecting devices 20 are integrated rotated by 180 angular degrees to one another, in particular cast. The anchor element 4 is designed as a plate and extends from an edge 22 of the edge protection element 2. When the two prefabricated parts 11 are brought together, the two hook elements 21 overlap and deform elastically until they hook into one another when connected. The two connecting devices 20 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 thus automatically form a form-fitting connection for the transmission of tensile forces, which subsequently prevents the prefabricated parts 11 from moving away from one another.

Alternatively, additional openings 8 can be made in the connecting elements 3, which in the connected state are connected to connecting means 14, for example screw connections.

The Figures 7 to 10 show a connecting device 30 according to a third embodiment not according to the invention. In contrast to the first two embodiments, the anchor element 4 is formed from a multiplicity of elongate elements 31 which extend in two, preferably essentially parallel planes 32 and 33 from the edge protection element 2. Alternatively, the elongate elements 31 can extend from the edge protection element 2 in one plane or in more than two planes. The connecting element 3 of the connecting device 30 consists either of two plates 34 essentially parallel to one another or of a plate 35 which can be inserted between the two plates 34 and preferably has the same length as the two plates 34. In addition, openings 8 are made in the plates 34 and 35.

Two thin-walled prefabricated parts 11 into which a connecting device 30 is integrated, in particular cast, can according to FIG Figure 10 are connected to one another along their end faces 13. Here, one prefabricated part 11 always has a first connecting device 30, which has the connecting element 3 from the two essentially parallel plates 34, and the other prefabricated part 11 has a second connecting device 30, which has the connecting element 3 from the plate 35.

When the two prefabricated parts 11 are brought together, the plate 35 is inserted between the two essentially parallel plates 34, the parallel plates 34 and / or the plate 35 resting against the edge protection elements 2 in the connected state. In the connected state, connecting means 14, for example screw connections, are introduced into the openings 8. A set of two connecting devices 30 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 forms a form-fitting and force-fitting connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

The Figures 11 and 12 show a connecting device 40 according to an embodiment of the invention. Essentially the same as the one according to the invention. Embodiment of the third embodiment, with the difference that the anchor element 4 is formed from the toothed elements 9, the elongated elements 31 and two substantially parallel plates 41, which extend from opposite edges 22 of the edge protection element 2 in the same direction. This advantageously partially or completely protects the end face 13 and the surfaces 18 of the prefabricated part 11 against which the edge protection element 2 rests. During the transmission of force from the thin-walled prefabricated parts 11 to the connecting device 40 with the aid of the finely structured anchor elements 31, bond stresses arise which can lead to the pourable and curable material 12 splitting. The additional plates 41 hinder the transverse tensile stresses and prevent possible splitting. In addition, the toothed elements 9 form a connection and thus an additional stiffening element of the two plates 41 and prevent deformations resulting from the internal transverse pressure forces.

Two thin-walled prefabricated parts 11, in which a connecting device 40 according to the invention is integrated, in particular cast, can be connected to one another along their end faces 13. One prefabricated part 11 always has a first connecting device 40, which has a connecting element 3 from the two essentially parallel plates 34, and the other prefabricated part 11 has a second connecting device 40, which has a connecting element 3 from plate 35. When the two prefabricated parts 11 are brought together, the plate 35 is inserted between the two essentially parallel plates 34, the parallel plates 34 and the plate 35 resting against the edge protection elements 2 in the connected state. In the connected state, connecting means 14, for example screw connections, can be introduced into openings 8. A set of two connecting devices 40 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 forms a shape and Frictional connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

The Figures 13A and 13B show a connecting device 50 according to a fifth embodiment not according to the invention. The anchor element 4 is formed from the elongate elements 31. The connecting element 3 of the connecting device 50 comprises either a slot-shaped recess 51 or a plate 52 which can be inserted into the slot-shaped recess 51 and which has the same length as the slot-shaped recess 51. In this way, the prefabricated parts 11 can be connected to one another completely without joints and flush.

Two thin-walled prefabricated parts 11, into which a connecting device 50 is integrated, in particular cast, can be connected to one another along their end faces 13. One prefabricated part 11 always has a first connecting device 50, which has a connecting element 3 from the slot-shaped recess 51, and the other prefabricated part 11 has a second connecting device 50, which has a connecting element 3 from the plate 52. When the two prefabricated parts 11 are brought together, the plate 52 is inserted into the slot-shaped recess 51, the plate 52 in the connected state resting on the bottom of the slot-shaped recess 51. In addition, in the connected state, the two edge protection elements 2 of the connecting devices 50 rest against one another. In the connected state, connecting means 14, for example screw connections, are introduced into openings 8, which are located in the slot-shaped recess 51 and the corresponding prefabricated part 11 and in the plate 52. A set of two connecting devices 50 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 forms a positive and non-positive connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

As in the Figures 14A and 14B As shown, the edge protection element 2 of the second connecting device 50 can be designed as an angle profile 53. As a result, a corner connection of two connecting devices 50 and / or prefabricated parts 11 can be realized. If, on the other hand, a “conventional”, level connection is implemented, the angle profile 53 enables additional protection around the edge and partially on the surface 18 of the prefabricated part 11.

The Figures 15 to 18 show a connecting device 60 according to a sixth, not according to the invention, embodiment. The anchor element 4 is formed from the elongate elements 31. The connecting element 3 of the connecting device 60 is either made of an angle profile 61 with a first leg 62, which extends from edge protection element 2, and a second leg 63, which is essentially parallel to edge protection element 2, or as a square hollow profile 64 with a groove 65, essentially parallel to edge protection element 2, between hollow profile 64 and edge protection element 2 , wherein the depth of the groove 65 and the length of the second leg 63 are the same, formed. As a result, the connecting devices 60 or the prefabricated parts 11 can be connected to one another without any joints.

Two thin-walled prefabricated parts 11, in which a connecting device 60 is integrated, in particular cast, can be connected to one another along their end faces 13. One prefabricated part 11 always has a first connecting device 60, which has a connecting element 3 from the angle profile 61, and the other prefabricated part 11 has a second connecting device 60, which has a connecting element 3 from the hollow profile 64. When the two prefabricated parts 11 are brought together, the angle profile 61 is partially slipped over the hollow profile 64, the second leg 63 of the angle profile 61 engaging in the groove 65 of the hollow profile 64 in the connected state. In the connected state, connecting means 14, for example screw connections, can be introduced into openings 8 which are made in the angle profile 61 and the hollow profile 64. A set of two connecting devices 60 for connecting thin-walled prefabricated parts 11 made of a pourable and curable material 12 forms a positive and non-positive connection for the transmission of tensile forces, compressive forces and, in some cases, bending moments.

As in Figure 18 As shown, the square hollow profile 64 of the second connecting device 60 can be formed with a groove 65 that is essentially orthogonal to the edge protection element 2 and is open on one side. The hollow profile 64 is essentially at 90 degrees to the in Figure 17 shown hollow profile 64 rotated. In this way, a corner connection of two connecting devices 60 and / or prefabricated parts 11 can be realized.

All conceivable and possible designs of the connecting devices 1, 20, 30, 40, 50 and 60 can - regardless of the explicit design of the anchor element 4 - have an anchor element 4 that has a cuboid installation volume, with a ratio of the height of the installation volume to the width of the Installation volume and / or from the height of the installation volume to the length of the installation volume is at most 10 to 100, preferably at most 5 to 100. In this case, the "installation volume" corresponds to the maximum volume that the anchor element 4 has after installation into another element, in particular into a prefabricated part 11, claimed in this element by its external dimensions, namely length, height and width.

All conceivable and possible configurations of the connecting devices 1, 20, 30, 40, 50 and 60 can - regardless of the explicit configuration of the edge protection element 2 - have an edge protection element 2 which has a length that is at least five times, preferably at least ten times, the Height of the edge protection element 2 is.

Due to the installation volume of the connection devices 1, 20, 30, 40, 50 and 60 described above, such connection devices 1, 20, 30, 40, 50 and 60 are suitable for integration into a thin-walled prefabricated part 11 made of a castable and hardenable material 12. In this case, “thin-walled” means that the thin-walled prefabricated part 11, for example in FIG Figure 17 shown, has a thickness in the range from half a centimeter to twelve centimeters, preferably in the range from one centimeter to four centimeters.

A method according to the invention for producing the thin-walled prefabricated part 11 from a cast and hardenable material 12 has the following method steps:
In a first process step, a formwork for the thin-walled prefabricated part 11 is erected. The connecting device according to the invention is used as part of the formwork, whereby it is advantageous to use the entire height of an end face 13 of the prefabricated part 11, which height can essentially correspond to the thickness 17 of the prefabricated part 11, and the entire length of this end face 13, which length essentially corresponds to the Length 19 of the prefabricated part 11 may correspond, covers. Alternatively, the connecting device according to the invention can form part of the formwork in the area of several end faces 13 of the prefabricated part 11.

In a second process step, the formwork is filled with a pourable and curable material 12, for example concrete, ice or plastic. The anchor element 4 or the anchor elements 4 are cast into the prefabricated part 11, the edge protection element 2 or the edge protection elements 2 resting against the end face (s) 13 of the prefabricated part 11. The material 12 is then cured in a third process step. In a fourth process step, the thin-walled prefabricated part 11 is removed from the formwork.

It should be mentioned that the anchor element (s) 4 and / or the connecting means 3 and / or the toothed elements 9 are made of roughened, perforated and / or profiled thin strips, roughened or ribbed rods, tendons or plates, for example sheet metal or steel rods or fiber-reinforced plastic rods, the strips, rods, tendons or plates made of metal, in particular steel, plastic, fiber-reinforced plastic, wood or a composite of the aforementioned materials or materials.

It should also be mentioned that the connecting device according to the invention or the method according to the invention can be used for the production of a single or double curved shell from several thin-walled prefabricated parts 11. The shell could for example be used as a tunnel element or as a roof for a building.

It should also be mentioned that the connecting device according to the invention or the method according to the invention can be used for the production of normal or thick-walled prefabricated parts, for example for the production of prefabricated walls or ceilings.

Claims (20)

1. A connecting device (40) for connecting thin-walled prefab elements (11) made from a castable and curable material (12), wherein the connecting device (40) has at least one connecting element (3), an edge protecting element (2) abutting at least in part a front face (13) of the prefab element (11) and at least one anchor element (4), wherein the at least one connecting element (3) extends from the edge protecting element (2) and the at least one anchor element (4) extends from the edge protecting element (2), wherein the edge protecting element (2), the anchor element (4) and the connecting element (3) are configured as a single part, wherein the anchor element (4) has toothed elements (9), which extend transversally, preferably substantially orthogonally, from the anchor element (4) and wherein the anchor element (4) has at least two slabs (41) substantially in parallel to one another with the toothed elements (9), wherein the slabs (41) extend from opposing fringes (22) of the edge protecting element (2) in the same direction, characterized in that the anchor element (4) has a plurality of elongate elements (31), which extend from the edge protecting element (2).
2. A connecting device (40) according to claim 1, characterized in that the connecting element (3) and the anchor element (4) extend substantially in parallel to one another.
3. A connecting device (40) according to claim 1 or 2, characterized in that the elongate elements (31) extend in several, preferably substantially parallel, planes (32, 33) from the edge protecting element (2).
4. A connecting device (40) according to any of the claims 1 to 3, characterized in that the anchor element (4) has a cuboid mounting volume, wherein a ratio between height of the mounting volume to width of the mounting volume and/or height of the mounting volume to length of the mounting volume is at the most 10 to 100, preferably at the most 5 to 100.
5. A connecting device (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) is configured as an angular profile having a first leg (15), which extends from the edge protecting element (2), and a second leg (16), which extends substantially in parallel to the edge protecting element (2).
6. A connecting device (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) is configured as a resiliently deformable hook element (21).
7. A set comprised of two connecting devices (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) of the first connecting device (40) is formed by two slabs (34) substantially in parallel to one another and that the connecting element (3) of the second connecting device (40) comprises a slab (35), which may be introduced in-between the slabs (34) of the first connecting device (40) and has preferably a same length as the slabs (34) of the first connecting device (40).
8. A set comprised of two connecting devices (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) of the first connecting device (40) comprises a slit-like recess (51) and that the connecting element (3) of the second connecting device (40) comprises a slab (52), which may be introduced into the slit-like recess (51) of the first connecting device (40) and has preferably a same length as the slit-like recess (51).
9. A set comprised of two connecting devices (40) according to claim 8, characterized in that the edge protecting element (2) of the second connecting device (40) is configured as an angular profile (53).
10. A set comprised of two connecting devices (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) of the first connecting device (40) is configured as an angular profile (61) having a first leg (62), which extends from the edge protecting element (2), and a second leg (63), which is substantially in parallel to the edge protecting element (2), and that the connecting element (3) of the second connecting device (40) is configured as a square hollow profile (64) having a groove (65) substantially in parallel to the edge protecting element (2) between the hollow profile (64) and the edge protecting element (2), wherein the depth of the groove (65) and the length of the second leg (63) are preferably the same in size.
11. A set comprised of two connecting devices (40) according to any of the claims 1 to 4, characterized in that the connecting element (3) of the first connecting device (40) is configured as an angular profile (61) having a first leg (62), which extends from the edge protecting element (2), and a second leg (63), which is substantially in parallel to the edge protecting element (2), and that the connecting element (3) of the second connecting device (40) is configured as a square hollow profile (64) having a groove (65) that is open on a half side and substantially orthogonal to the edge protecting element (2) between the hollow profile (64) and the edge protecting element (2), wherein the depth of the groove (65) and the length of the second leg (63) are preferably the same in size.
12. A connecting device (40) or a set comprised of two connecting devices (40) according to any of the claims 1 to 11, characterized in that the connecting element (3) has at least one opening (8) for a connecting means (14).
13. A connecting device (40) or a set comprised of two connecting devices (40) according to any of the claims 1 to 12, characterized in that the edge protecting element (2) has a length, which is at least five times, preferably at least ten times, the height of the edge protecting element (2).
14. A thin-walled prefab element (11) made from a castable and curable material (12) having at least one connecting device (40) or a set comprised of two connecting devices (40) according to any of the claims 1 to 13, characterized in that the thin-walled prefab element has a thickness in the range of half a centimetre to twelve centimetres, preferably in the range of one centimetre to four centimetres.
15. A thin-walled prefab element (11) according to claim 14, characterized in that a height of the edge protecting element (2) of the connecting device (40) corresponds to at least the thickness (17) of the prefab element (11) in the area of a front face (13) of the prefab element (11) abutting the edge protecting element (2).
16. A thin-walled prefab element (11) according to claim 14 or 15, characterized in that the edge protecting element (2) of the connecting device (40) is configured as a single piece and completely abuts along the front face (13).
17. A thin-walled prefab element (11) according to claim 16, characterized in that the connecting device (40) forms part of a casing for the production of the thin-walled prefab element (11).
18. A thin-walled prefab element (11) according to any of the claims 14 to 17, characterized in that the anchor element (4) is completely cast into the prefab element (11).
19. A thin-walled prefab element (11) according to any of the claims 14 to 18, characterized in that the prefab element (11) is made from concrete, ice or plastic material.
20. A method for the production of a thin-walled prefab element (11) made from a castable and curable material (12), having the following method steps:

    mounting a casing for the thin-walled prefab element (11),

    filling the casing with a castable and curable material (12),

    curing the castable and curable material (12),

    removing the thin-walled prefab element (11); and

    characterized in that

    upon mounting the casing, there is arranged a connecting device (40) or a set comprised of two connecting devices (40) according to any of the claims 1 to 13 as part of the casing.

Images