Connecting anchor for multi-layer concrete slab and multi-layer concrete slab

Abstract

The connecting anchor for the multi-layer concrete slab comprises a plate, the plate having a first longitudinal side for being arranged in a first concrete layer and a second longitudinal side for being arranged in a second concrete layer, and a first transverse side and a second transverse side respectively connecting the first longitudinal side and the second longitudinal side. The plate has an end section adjacent to at least one longitudinal side, wherein the plate is bent out of the plate plane of the plate along a first bending direction at a first bending position and is bent along a second bending direction extending in an opposite direction to the first bending direction at a second bending position. The plate has at least two receiving parts, which are arranged at different distances relative to the second longitudinal side. A limiting element for limiting the insertion depth of the connecting anchor into the thermal insulation layer is releasably held in one of the at least two receiving parts. The multi-layer concrete slab comprises a first concrete layer, a second concrete layer, a thermal insulation layer arranged between the concrete layers, and at least one connecting anchor.

Description

Technical Field

[0001] The invention relates to a connecting anchor and a multi-layer concrete slab. Background Art

[0002] A connecting anchor for multi-layer concrete slabs, so-called sandwich slabs, is known from US Pat. No. 3,996,713 A, which is substantially designed as a rectangular slab. Adjacent to the two longitudinal sides, the connecting anchor has an opening through which an anchor rod can be inserted.

[0003] No. 4,624,089 A discloses a connecting anchor for use in sandwich panels, which has an end section that is bent over on the longitudinal side and through which an anchor rod is inserted. Summary of the invention

[0004] The object of the present invention is to provide a connecting anchor for a multi-layer concrete slab which has improved properties. A further object of the present invention is to specify a multi-layer concrete slab having an advantageous design.

[0005] This object is achieved with respect to the connecting anchor by a connecting anchor for a multi-layer concrete slab, wherein the connecting anchor comprises a slab having a first longitudinal side for arrangement in a first concrete layer and a second longitudinal side for arrangement in a second concrete layer, as well as a first transverse side and a second transverse side, respectively connecting the first longitudinal side to the second longitudinal side, wherein the slab has an end section adjacent to at least one longitudinal side, in which the slab is bent out of a slab plane of the slab at a first bending location along a first bending direction and is bent at a second bending location along a second bending direction, the second bending direction extending in a direction opposite to the first bending direction.

[0006] The object is also achieved by a connecting anchor for a multi-layer concrete slab, wherein the connecting anchor comprises a plate having a first longitudinal side for arrangement in a first concrete layer and a second longitudinal side for arrangement in a second concrete layer, as well as a first transverse side and a second transverse side, respectively connecting the first longitudinal side to the second longitudinal side, wherein the plate has at least two receptacles, which are arranged at different distances from the second longitudinal side, and a limiting element for limiting the insertion depth of the connecting anchor into the insulating layer is releasably held in one of the at least two receptacles.

[0007] With regard to the multi-layer concrete slab, the object is achieved by a multi-layer concrete slab comprising a first concrete layer, a second concrete layer, an insulating layer arranged between the concrete layers, and at least one connecting anchor, wherein the connecting anchor comprises a plate having a first longitudinal side and a second longitudinal side, wherein the first longitudinal side is arranged in the first concrete layer and the second longitudinal side is arranged in the second concrete layer, wherein the plate has a first transverse side and a second transverse side, which extend from the first concrete layer through the insulating layer into the second concrete layer, wherein the plate has an end section adjacent to at least one longitudinal side, which end section is arranged in one of the concrete layers, and in which the plate is bent out of the plate plane at a first bending location along a first bending direction and at a second bending location along a second bending direction, the second bending direction being the opposite direction of the first bending direction.

[0008] The object is also achieved by a multi-layer concrete slab, which comprises a first concrete layer, a second concrete layer, an insulating layer arranged between the concrete layers, and at least one connecting anchor, wherein the connecting anchor comprises a plate, which has a first longitudinal side and a second longitudinal side, wherein the first longitudinal side is arranged in the first concrete layer and the second longitudinal side is arranged in the second concrete layer, wherein the plate has a first transverse side and a second transverse side, which extend from the first concrete layer through the insulating layer into the second concrete layer, wherein the plate has at least two receiving parts, which are arranged at different distances relative to the second longitudinal side, wherein a limiting element is arranged in one of the receiving parts, which rests on the insulating layer with a supporting section.

[0009] The object is also achieved by a multi-layer concrete slab comprising a first concrete layer, a second concrete layer, an insulating layer arranged between the concrete layers, and at least one connecting anchor, wherein the connecting anchor comprises a plate having a first longitudinal side and a second longitudinal side, wherein the first longitudinal side is arranged in the first concrete layer and the second longitudinal side is arranged in the second concrete layer, wherein the plate has a first transverse side and a second transverse side, which extend from the first concrete layer through the insulating layer into the second concrete layer, wherein the plate has at least one recess on at least one longitudinal side, which separates two fingers of the plate from one another, wherein the finger extends into one of the concrete layers and wherein the bottom of the recess is arranged in the insulating layer.

[0010] In order to improve the anchoring of the connecting anchor in the surrounding concrete, claim 1 provides that the plate has an end section adjacent to at least one longitudinal side, in which end section the plate is bent out of the plate plane of the plate at a first bending point along a first bending direction and is bent at a second bending point along a second bending direction, which second bending direction extends in a direction opposite to the first bending direction.

[0011] The plate is bent out of the plate plane and back in the direction of the plate plane, thereby producing a zigzag shape of the plate. As a result, undercuts are formed on both sides of the plate in the direction of the middle plane between the longitudinal sides of the plate. If the connecting anchor is embedded in the concrete of the sandwich panel, an undercut is produced in the direction of the thermal insulation layer. This achieves an improved anchoring of the connecting anchor and a better transmission of forces between the concrete layers of the concrete slab. At the second bending point, the plate is bent along the second bending direction, and due to the second bending point, the total thickness of the plate can be kept small, so that the plate can be better inserted into the existing reinforcement gaps in the concrete layers.

[0012] In particular for textile reinforced concrete layers, the design of the at least one end section with a first and a second bending point is advantageous. The first and the second bending point are provided in particular if the thickness of the concrete layer is small, into which the connecting anchor projects. The thickness of the concrete layer is preferably less than 5 cm.

[0013] Preferably, the plate has a corrugated profile in at least one end section, which is formed by a plurality of bends. At least four bends per end section are considered particularly advantageous. The corrugated profile is produced in particular in that the bends are arranged at equal distances from the plate plane. In a particularly advantageous embodiment, the plate has an end section with at least one first bend and one second bend adjacent to each longitudinal side. Preferably, end sections with a corrugated profile are provided on both longitudinal sides.

[0014] Advantageously, the plate has at least one recess on at least one longitudinal side. The bottom of the recess is advantageously rounded, preferably with a continuous radius. As a result, stresses at the bottom of the recess can be reduced to a minimum. The at least one recess preferably separates the fingers of the plate from one another. Particularly preferably, at least two fingers are provided on each longitudinal side of the plate, which fingers are separated from one another by a recess.

[0015] In order to improve the anchoring of the connecting anchor in the surrounding concrete, it is advantageously provided that the plate has at least one opening on at least one longitudinal side that passes through the plate. The at least one opening is advantageously arranged in a finger. It is particularly preferred that each finger has at least two openings. The two openings of each finger are advantageously arranged offset relative to one another not only in the longitudinal direction of the plate but also in its height direction. The at least one opening advantageously passes through the region of the end section that has at least one bend. Advantageously, the at least one opening is at least partially arranged between two bends. Improved anchoring of the connecting anchor, in particular in a textile-reinforced concrete layer, is achieved by means of the at least one opening. If the concrete layer has no textile reinforcement but instead has reinforcing rods, the at least one opening can be used to receive the reinforcing rods, which form additional reinforcement for the plate.

[0016] The arrangement of at least two receiving parts on the plate forms an independent and original concept, wherein the receiving parts are arranged at different distances from the second longitudinal side. A limiting element for limiting the insertion depth of the connecting anchor into the thermal insulation layer is releasably held in one of the at least two receiving parts. The limiting element can be optionally arranged in one of the at least two receiving parts by releasably fixing it in the receiving part. The insertion depth of the connecting anchor into the thermal insulation layer is predetermined by the selection of a receiving part. A plurality of receiving parts are arranged at the same distance from the second longitudinal side, whereby the insertion depth of the connecting anchor into the thermal insulation layer can be adjusted.

[0017] When manufacturing a concrete slab, first one of the concrete layers, preferably a second concrete layer forming an additional formwork, is poured. Subsequently, the insulating layer is laid onto this concrete layer. The at least one connecting anchor is pressed into the concrete layer that has not yet hardened through the insulating layer. The connecting anchor is pressed into the insulating layer until the supporting section of the limiting element rests on the upper side of the insulating layer and thus makes further insertion of the connecting anchor into the insulating layer and the already poured first concrete layer difficult or prevented. After all the connecting anchors have been installed, the second concrete layer is then poured onto the insulating layer and the section of the connecting anchor that protrudes beyond the insulating layer is poured into this concrete layer. By means of the adjustable insertion depth, it can be ensured, in particular for thin concrete layers, that the connecting anchor cannot be pushed all the way to the outer side of the second concrete layer. This ensures that the connecting anchor is not visible from the outer side of the concrete slab.

[0018] In an advantageous design, the at least one receiving portion is arranged in the lateral side of the plate. Preferably, the limiting element can be inserted or clipped into the receiving portion. In an alternative design, it is provided that the at least one receiving portion is arranged between the lateral sides of the plate. The receiving portion arranged between the lateral sides is advantageously constructed in a closed manner over its entire circumference. In order to be able to easily install the limiting element in at least one receiving portion arranged between the lateral sides of the plate, it is preferably provided that the limiting element is constructed as a two-part structure. As a result, the sections can be arranged in the receiving portion from opposite sides of the receiving portion and then connected to each other. It can be provided that the plate has receiving portions not only on the lateral sides but also between the lateral sides of the plate.

[0019] In an advantageous embodiment, the receiving portion is arranged mirror-symmetrically with respect to a center surface of the plate extending centrally between the longitudinal sides. As a result, the limiting element can be used to limit the insertion depth both in the first concrete layer and in the second concrete layer. In a particularly preferred embodiment, the plate is designed mirror-symmetrically with respect to the center surface. As a result, the orientation of the plate does not need to be taken into account when it is arranged in the thermal insulation layer and the concrete layer.

[0020] Advantageously, the shape of the connecting anchor is adapted in view of the low heat transfer between the concrete layers. Advantageously, the shape of the section of the plate that is provided for arrangement in the thermal insulation layer is different from a rectangle. Preferably, it is provided that one longitudinal side of the connecting anchor is shorter than the other longitudinal side. The longitudinal side with the smaller length is preferably arranged in a concrete layer with a smaller thickness, advantageously in an additional formwork. This refers in particular to the second concrete layer. Advantageously, at least one transverse side extends at an angle of less than 90° relative to one of the longitudinal sides in at least one section, in particular in a section to be arranged inside the thermal insulation layer. In an advantageous design, it can also be provided that the connecting anchor has at least one additional recess in the area provided for arrangement in the thermal insulation layer. The at least one additional recess reduces the heat transfer from the first longitudinal side to the second longitudinal side.

[0021] According to an independent and inventive concept, a multi-layer concrete slab is provided that comprises a first concrete layer, a second concrete layer, a heat-insulating layer arranged between the concrete layers, and at least one connecting anchor. The connecting anchor comprises a plate having a first longitudinal side and a second longitudinal side. The first longitudinal side is arranged in the first concrete layer and the second longitudinal side is arranged in the second concrete layer.

[0022] The panel has a first lateral side and a second lateral side, which extend from the first concrete layer through the heat-insulating layer into the second concrete layer. The panel has an end section adjacent to the at least one longitudinal side, which is arranged in one of the concrete layers and in which the panel is bent out of the panel plane at a first bending point along a first bending direction and at a second bending point along a second bending direction, which is opposite to the first bending direction.

[0023] An improved anchoring effect of the end section in the concrete is achieved by the at least two bends in the end section arranged in one of the concrete layers.

[0024] The concrete slab is advantageously a so-called sandwich slab in which the two concrete layers are arranged directly on two opposite flat sides of the thermal insulation layer and the thermal insulation layer is fixedly connected.

[0025] An independent and original concept relates to the shaping of a concrete slab having a first concrete layer, a second concrete layer and an insulating layer arranged between the concrete layers, wherein the concrete slab has at least one connecting anchor with the slab, wherein the slab has at least two receptacles which are arranged at different distances from a second longitudinal side of the slab, wherein a limiting element is arranged in one of the receptacles, which rests with a supporting section against the insulating layer.

[0026] The slab has at least two receptacles, whereby the insertion depth of the connecting anchor into the thermal insulation layer and into one of the concrete layers can be adjusted in a simple manner. The desired insertion depth can be ensured by the arrangement of the limiting element in the provided receptacles. If a plurality of connecting anchors are provided for the concrete slab, it can be ensured that all connecting anchors protrude into the concrete layer to the same extent.

[0027] All limiting elements of the connecting anchor are arranged in receptacles of the plate, which are at the same distance from the second longitudinal side of the plate, thereby achieving a uniform insertion depth of the plate into the thermal insulation layer.

[0028] Another independent concept relates to a multi-layer concrete slab with a connecting anchor, wherein the connecting anchor comprises a slab. The slab has at least one recess on at least one longitudinal side, which separates two fingers of the slab from one another. The finger protrudes into one of the concrete layers. The bottom of the recess is arranged in the thermal insulation layer. The bottom of the recess is arranged in the thermal insulation layer, thereby resulting in a reduced heat input into the concrete layer into which the finger protrudes. An improved thermal insulation effect is thus achieved. The bottom of the recess is arranged in the thermal insulation layer, thereby resulting in an enlarged cross section of the slab in the thermal insulation layer, so that sufficient strength of the slab is achieved and high forces can be transmitted between the concrete layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The embodiments of the present invention are explained below with the aid of the accompanying drawings.

[0030] Figure 1 shows a schematic cross-sectional view of a concrete slab in the region of a connecting anchor;

[0031] Figure 2 Shows Figure 1 A side view of a plate of a concrete slab with connection anchors;

[0032] Figure 3 Shows Figure 3 of the board, along Figure 2 A side view in the direction of arrow III;

[0033] Figure 4 A side view of a restraining element is shown;

[0034] Figure 5 shows the limiting element along Figure 4 A side view in the direction of arrow V;

[0035] Figure 6 The limiting element is shown along Figure 4 A top view in the direction of arrow VI;

[0036] Figure 7 A schematic sectional view shows an arrangement of a heat-insulating layer of a concrete slab, a first concrete layer and a heat-insulating layer before a connecting anchor is installed in the heat-insulating layer and the first concrete layer;

[0037] Figure 8 Shows Figure 7 The connection anchors, insulation layer and first concrete layer, along Figure 7 A top view in the direction of arrow VIII in FIG. 1 after the connecting anchor is installed in the insulation layer and the concrete layer;

[0038] Fig. 9A schematic partial cross-sectional view of an embodiment of a connecting anchor in an insulating layer and a first concrete layer;

[0039] Fig.10 A side view of one embodiment of a plate connecting an anchor is shown;

[0040] Fig.11 A diagrammatic representation of a restraining element of a two-part construction is shown in side view;

[0041] Fig.12 Along the Fig.11 A side view in the direction of arrow XII shows Fig.11 The limiting element;

[0042] Fig.13 shows the limiting element along Fig.11 A top view in the direction of arrow XIII;

[0043] Fig.14 A schematic sectional view of an exemplary embodiment of an arrangement of a connecting anchor of a concrete slab, a thermal insulation layer and a first concrete layer before the connecting anchor is installed in the thermal insulation layer and the first concrete layer;

[0044] Fig.15 shows a side view of one embodiment of a restraining element;

[0045] Fig.16 Shows Fig.15 The limiting element, along Fig.15 A side view in the direction of arrow XVI;

[0046] Fig.17 Shows Fig.15 The limiting element, along Fig.15 A side view in the direction of arrow XVII;

[0047] Fig.18 Shows that there is Figures 15 to 17 A top view of the connection anchor of the limiting element in the thermal insulation layer;

[0048] Fig.19 Shows Fig.18 A side view of a connecting anchor in an insulation layer and a concrete layer;

[0049] Figures 20 to 23 Examples of concrete panels with differently designed connecting anchors are shown;

[0050] Fig.24 Another embodiment of a plate for connecting anchors is shown;

[0051] Fig.24aThe enlarged portion of the diagram shows Fig.24 an area of ​​the receiving portion of the plate; and

[0052] Figures 25 to 29 Additional embodiments of plates for connecting anchors are shown. DETAILED DESCRIPTION

[0053] Figure 1 A cutout of a concrete slab 1 is schematically shown. The concrete slab 1 is constructed as a multi-layer structure. The concrete slab 1 comprises a first concrete layer 11, which is advantageously a load-bearing layer, a second concrete layer 12, which in particular forms an additional formwork, and a heat-insulating layer 2 arranged between the first concrete layer 11 and the second concrete layer 12. In order to transmit forces between the first concrete layer 11 and the second concrete layer 12 through the heat-insulating layer 2, at least one connecting anchor 3 is provided. Preferably, a plurality of connecting anchors 3 are distributedly positioned in the concrete slab 1 in a predetermined arrangement structure in combination with needle-shaped connecting anchors (not shown) or connecting anchors of other types.

[0054] The connecting anchor 3 comprises a plate 4. The plate 4 has an approximately rectangular shape in the present embodiment. Other shapes of the plate 4 can also be advantageous. The plate 4 has a first longitudinal side 5 arranged in the first concrete layer 11 and an opposite second longitudinal side 6 arranged in the second concrete layer 12. The two longitudinal sides 5 and 6 are connected to each other by transverse sides 7 and 8. The transverse sides 7 and 8 extend from the first concrete layer 11 through the insulating layer 2 into the second concrete layer 12.

[0055] The plate 4 has an imaginary middle plane 31 extending centrally between the longitudinal sides 5 and 6. In the present exemplary embodiment, the plate 4 is designed mirror-symmetrically with respect to the middle plane 31. The plate 4 has a plurality of receptacles 14 on its transverse sides 7 and 8. In the present exemplary embodiment, five receptacles 14 are provided on each transverse side 7 or 8. The receptacles 14 are designed to be approximately U-shaped. In the present exemplary embodiment, limiting elements 15 are arranged on each transverse side 7 or 8 in the receptacles 14 closest to the second longitudinal side 6. The limiting elements 15, which will be described in more detail below, limit the insertion depth t of the connecting anchor 3 into the composite structure consisting of the thermal insulation layer 2 and the second concrete layer 12 during the production of the concrete slab 1. The thermal insulation layer 2 has a thickness k1.

[0056] On each longitudinal side 5 and 6, the plate 4 has a plurality of recesses 10. In the present embodiment, four recesses 10 are provided on each longitudinal side 5 and 6. The recesses 10 are designed in the form of slits and are open toward the respective adjacent longitudinal side 5, 6. The recesses 10 have a bottom 30, which is advantageously designed to be curved, in the present embodiment to be partially circular. Figure 1As shown, the bottom 30 of the recess 10 arranged adjacent to the second longitudinal side 6 is arranged in the thermal insulation layer 2. The bottom 30 arranged adjacent to the first longitudinal side 5 extends in the first concrete layer 11.

[0057] Figure 2 The plate 4 of the connecting anchor 3 is shown in detail. The plate 4 is preferably constructed from a sheet metal with a constant thickness. The plate 4 is preferably a bent sheet metal part, from which openings, recesses, recesses, etc. are punched out and which is bent into the desired shape in the end sections 19 and 20. The plate 4 can be made of steel, preferably high-quality steel, for example. However, designs made of other materials can also be advantageous. Figure 2 As shown, the plate has a length d measured parallel to the middle surface 31 and a height h measured perpendicular to the middle surface 31. The height h corresponds at least to the thickness k of the thermal insulation layer 2 (see Figure 1 ) plus double the minimum embedding depth, with which the connecting anchor 3 must extend into the concrete layer 11 or 12 in order to ensure that sufficient force is introduced into the concrete layers 11 and 12.

[0058] Also like Figure 2 As shown, the recesses 10 separate the individual fingers 13 of the plate 4 from one another. In the present exemplary embodiment, four recesses 10 and five fingers 13 are provided on each longitudinal side 5, 6. The number of fingers 13 and recesses 10 can also be selected to be adapted to the respective application. Figure 2 As shown, the recess 10 has a width g. The finger 13 has a width f. The width f of the finger 13 is advantageously 0.5 to 3 times the width g of the recess 10. Figure 2 As shown, openings 9 are provided in the end sections 19 and 20 . Each finger 13 advantageously has at least one opening 9 , preferably at least two openings 9 .

[0059] In the present embodiment, five receiving portions 14 are arranged on each lateral side 5, 6. The receiving portions 14 of each lateral side 5, 6 have different spacings relative to the second longitudinal side 6. The receiving portion 14 closest to the longitudinal side 6 has a spacing a1 relative to the longitudinal side 6. The receiving portion 14 immediately following it is arranged at a spacing a2 relative to the longitudinal side 6, and the spacing is approximately larger than the spacing a1 by the width of the receiving portion 14. The other receiving portions 14 are arranged at spacings a3, a4 and a5 relative to the longitudinal side 6. In the present embodiment, the spacings a1 to a5 are selected so as to produce a constant spacing between adjacent receiving portions 14. However, different spacings between adjacent receiving portions 14 may also be advantageous. The spacings a1 to a5 correspond to the insertion depth t( Figure 1), the insertion depth can be adjusted by the arrangement structure of the limiting element 15 in the corresponding receiving part 14.

[0060] Figure 3 The design of the end sections 19 and 20 is shown in detail. A first bending point 21 is provided in each end section 19, 20, at which the plate 4 is bent out of its plate plane 27 along a first bending direction 25. At a second bending point 22, the plate 4 is bent along a bending direction 26 oriented opposite to the bending direction 25. At a third bending point 23, a further bending takes place along the bending direction 25, and at a fourth bending point 24, a further bending takes place along the bending direction 26. The plate plane 27 extends centrally between a first flat side 28 and a second flat side 29 of the plate 4 in a flat region of the plate 4 between the end sections 19 and 20. The bending points 22, 23 and 24 have the same spacing relative to the plate plane 27. In the present embodiment, a 90° bend is made at each of the bending points 22, 23 and 24. As a result, a serrated or wavy course of the plate 4 is produced in the end sections 19 and 20. As also shown in FIG. Figure 3 As shown, the plate 4 has a constant thickness p. In the present exemplary embodiment, the bends 21 to 24 extend parallel to the longitudinal sides 5 , 6 .

[0061] Figures 4 to 6 A first embodiment of a limiting element 15 is shown. The limiting element 15 can be, for example, a bent, deformed wire section. The limiting element 15 has a support section 16 which connects two feet 17 to one another. In the present embodiment, the feet 17 extend at a right angle to the support section 16. The support section 16 is designed as a crossbar. A tip 18 is formed on each of the feet 17, with which the limiting element 15 can be pressed into the thermal insulation layer 2.

[0062] Figure 7 The connecting anchor 3 is shown during the production of a concrete slab 1. The connecting anchor 3 has a limiting element 15 on each transverse side 7 and 8. The two limiting elements 15 are arranged in a receptacle 14 which is at the same distance from the second longitudinal side 6. The second concrete layer 12 of the concrete slab 1 has already been cast. The thermal insulation layer 2 is laid on the second concrete layer 12. The connecting anchor 3 is now pressed through the thermal insulation layer 3 and into the still uncured concrete of the second concrete layer 12 until the support section 16 of the limiting element 15 rests on the upper side of the thermal insulation layer 2. The support section 16 can be slightly pressed into the thermal insulation layer 2.

[0063] Figure 8The arrangement is shown after the connection anchor 3 has been pressed in. The support sections 6 of the two limiting elements 15 rest against the thermal insulation layer 2. The plate 4 projects out of the thermal insulation layer 2. The foot 17 and the tip 18 are arranged within the thermal insulation layer 2.

[0064] Fig. 9 An embodiment of a connecting anchor 3 is shown, which is arranged in the second concrete layer 12 and the thermal insulation layer 2. In the embodiment shown, the limiting element 15 is arranged in the receiving portion 14. The receiving portion has a spacing a3 relative to the second longitudinal side 6. Fig. 9 In the embodiment of the present invention, the heat insulation layer 2 has a thickness k2 which is greater than Figure 1 By arranging the limiting elements 15 in the different receptacles 14, the insertion depth t can be adapted to the thickness k of the thermal insulation layer 2 so that only the fingers 13 protrude into the second concrete layer 12 and the bottom 30 of the recess 10 is arranged inside the thermal insulation layer 2. Furthermore, by suitable selection of the insertion depth t, it can be ensured that the connecting anchor 3 cannot reach all the way to the outer side of the second concrete layer 12 and is therefore not visible in the finished concrete slab 1.

[0065] Fig.10 A further embodiment of a plate 4 for connecting anchors 3 is shown. The plate 4 has a receptacle 34 for a limiting element 15 arranged between the lateral sides 7 and 8. In this embodiment, the receptacle 34 is designed as an opening that is closed over its entire circumference. The receptacle 34 can be a circular receptacle 34, for example. Fig.10 In the embodiment of , two rows of receiving parts 34 are arranged at a spacing m relative to each other, each row having five receiving parts. The spacing m of the rows is advantageously at least 20% of the length d of the plate 4. In the present embodiment, each row of receiving parts 34 has five receiving parts 34, which have different spacings a1 to a5 relative to the second longitudinal side 6. Other numbers of rows of receiving parts 14 can also be advantageous. In addition to the receiving parts 34, five receiving parts 14 are arranged on each of the two transverse sides 7, 8, which have the same spacings a1 to a5 as the receiving parts 34 relative to the second longitudinal side 6. Therefore, for each insertion depth t, less than four limiting elements 15 can be arranged on the plate 4.

[0066] Figures 11 to 13An embodiment of a limiting element 15 is shown, which is provided for arrangement in a receptacle 34. The limiting element 15 is designed as a two-part structure. The bearing section 16 is divided into two sections 16.1 and 16.2. The bearing section 16 is designed as a web. The two sections 16.1 and 16.2 can be connected to one another, in the present embodiment, by a plug connection, which is formed by a journal 35 on the section 16.2 and a recess 36 on the section 16.1. The other constructions of the limiting element 15 correspond to those in Figures 4 to 6 The construction of the limiting element 15 is shown in FIG.

[0067] Fig.14 The arrangement of the limiting element 15 in the receiving part is shown before the connecting anchor 3 is installed in the second concrete layer 12 and the thermal insulation layer 2 .

[0068] exist Figures 15 to 17 Another embodiment of the limiting element 15 is shown in FIG. Figures 15 to 17 The limiting element 15 has a support section 16 which is designed as a plate. A foot 17 with a tip 18 is arranged on the limiting element 16 and extends vertically out of the plane of the support section 16. Fig.17 As shown, the bearing section 16 has a slot 37. At the end of the slot 37, a web 38 is arranged which is circular and has a diameter slightly greater than the thickness of the plate forming the bearing section 16. As a result, the web 38 projects slightly beyond the plane of the bearing section 16. The limiting element 15 can be glued into the receptacle 14 of the plate 4 using the web 38.

[0069] All limiting elements 15 are preferably manufactured as plastic injection-molded parts.

[0070] Figure 8 Two plates 4 are shown in accordance with Fig.15 and 17 The limiting element 15 of the shape of the plate is inserted into the thermal insulation layer 2 and the second concrete layer 12 located therebelow (not shown). The arrangement is formed with the second concrete layer 12 in Fig.19 Shown in. Fig.19 The arrangement of the web 38 in the receiving portion 14 and the arrangement of the support section 16 on the thermal insulation layer 2 are shown. Fig.19 As shown, the heat insulation layer 2 has a Fig.19 The first side 32 of the first concrete layer 11 (not shown) and the second side 33 facing the second concrete layer 12. The support section 16 is placed on the second side 32. The footing 17 and the tip 18 extend into the insulation layer 2. Fig.19As shown, the bottom 30 of the recess 10 extends on the second longitudinal side 6 within the thermal insulation layer 2 .

[0071] Fig. 20 Another embodiment of a multi-layer concrete slab 1 is shown. The concrete slab 20 comprises a first concrete layer 11 and a second concrete layer 12, in which reinforcing rods 39 are arranged respectively. The concrete layers 11 and 12 are connected to each other by connecting anchors 3. Fig. 20 One of the connecting anchors is shown in FIG. The reinforcing rods 39 are arranged in a grid-like manner in this embodiment parallel and perpendicular to the plane of the plate 4. The reinforcing rods 39 extending parallel to the plane of the plate 4 extend at the height of the fingers 13. The reinforcing rods 39 extending perpendicular to the plane of the plate 4 pass through the recesses 10 between adjacent fingers 13. Fig. 20 As shown, according to Fig. 20 Each finger in the exemplary embodiment of has four openings 9. It can be provided that additional reinforcement rods are also inserted through the individual openings 9 in the fingers 13.

[0072] according to Fig. 20 The plate 4 of the embodiment also differs from the previous embodiment in that the basic shape of the plate 4 in the section arranged in the heat insulating layer 2 is different from a rectangle. The section of the plate 4 extending into the second concrete layer 12 is configured to be narrower than the section extending into the first concrete layer 11. In the end section 19 extending into the first concrete layer 11, the plate 4 has a width b1, which is greater than the width b2 of the end section 20 extending into the second concrete layer 12. In order to compensate for the different widths b1 and b2, the transverse side of the plate 4, that is, the second transverse side 8 in the embodiment, extends partially obliquely relative to the longitudinal sides 5 and 6. In the embodiment, the second transverse side 8 encloses an angle α of less than 90° with the second longitudinal side 6 in a part of the area arranged in the heat insulating layer 2. The angle α is advantageously 20° to 80°, in particular 30° to 70°. In the embodiment, the angle α is approximately 60°.

[0073] In accordance with Fig. 20 In the embodiment of the present invention, the second concrete layer 12 is thinner. The second concrete layer 12 has a thickness n, which is advantageously less than 5 cm, in particular less than 4 cm, preferably less than 3 cm. However, a second concrete layer 12 with a greater thickness n can also be advantageous. In all embodiments, the thickness n of the second concrete layer 12 can advantageously be less than 5 cm, in particular less than 4 cm, preferably less than 3 cm. The second concrete layer 12 advantageously has textile reinforcement. Textile reinforcement is particularly provided for concrete layers 11, 12 with a thickness n of less than 5 cm.

[0074] according to Fig.21The embodiment of the present invention shows a concrete slab 1, the construction of which corresponds essentially to Fig. 20 The structure of the concrete slab 1. Fig.21 The concrete slab 1 of FIG. 1 differs from the exemplary embodiment according to FIG. 20 in the shaping of the section of the slab 4 arranged inside the thermal insulation layer 2. Fig.21 In addition to the recess 10 separating the fingers 13 from one another, the plate 4 has a further recess 40. The further recess 40 is arranged in the region of the plate 4 that is within the thermal insulation layer 2. Due to the further recess 40, webs 42 are formed on both sides of the further recess 40. This reduces the heat conduction from the second end section 20 to the first end section 19.

[0075] In accordance with Fig. 22 In the embodiment of the invention, the end sections 19 and 20 are offset relative to each other in the longitudinal direction of the plate 4. The section of the plate 4 arranged in the insulating layer 2 has the shape of a parallelogram. In the embodiment of the invention, the end sections 19 and 20 have the same width b. The transverse sides 7 and 8 are inclined at an angle α with respect to the longitudinal sides 5 and 6, which is less than 90°. In the embodiment according to Fig. 22 In the exemplary embodiment of , the angle α is approximately 60°. The two longitudinal sides 7 and 8 are inclined in the same direction. This results in a length d of the plate 4 that is greater than the width b of the end sections 19 and 20. Different widths b of the end sections 19 and 20 can also be advantageous.

[0076] according to Fig.23 The embodiment of the embodiment shows a concrete slab 1 having a connecting anchor 3 with a plate 4. The plate 4 has five fingers 13 on each longitudinal side 5, 6 in the present embodiment. The height h of the plate 4 is significantly smaller than its length d. The height h is less than half the length d in the present embodiment. The thickness k of the thermal insulation layer 2 is small. The bases 30 of the opposite recesses 10 are at a distance c from each other. The bases 30 of the recesses 10 of the two longitudinal sides 5 and 6 extend into the thermal insulation layer 2, so that the opposite bases 30 are arranged in accordance with Fig.23 In the embodiment of the present invention, the fingers 13 have only a small spacing c relative to one another. The length e of the fingers 13 is greater than the spacing c in this exemplary embodiment.

[0077] Figures 24 to 29 Different variants of plates 4 for connecting anchors 3 are shown, which differ from one another in terms of height h and length d. Depending on the respective length d, the number of fingers 13 is adapted. Figures 23 to 29The plate 4 shown in FIG. 4 has ten receptacles 14 on each lateral side 7, 8, wherein five receptacles 14 are arranged on each side of the center surface 31. The receptacles 14 are arranged mirror-symmetrically with respect to the center surface 31, so that the orientation of the plate 4 is not taken into account during the production of the concrete slab 1.

[0078] exist Fig.24a The shape of the receiving portion 14 is shown in detail in FIG. Fig.24a As shown, a latching element 41 is arranged on each receptacle 14, which latching element narrows the access opening into the receptacle 14. The remaining opening toward the outside is preferably slightly smaller than the diameter of the limiting element 15 to be arranged in the receptacle 14. As a result, the limiting element 15 is latched in the receptacle 14 and is held securely in the receptacle 14, in particular during the mounting of the connecting anchor 3 on the thermal insulation layer 2. As shown in the figures, the latching elements 41 are arranged in the present exemplary embodiment on the side of the receptacle 14 that is remote from the intermediate surface 31.

[0079] exist Fig.24 The plate 4 shown in FIG. 4 has two fingers 13 on each longitudinal side 5, 6. The height h is approximately 0.5 to 1.5 times the length d of the plate 4. Fig.25 In the embodiment shown, three fingers 13 are provided on each longitudinal side 5, 6. Accordingly, the length d of the plate 4 is enlarged relative to the height h. Fig.26 In the exemplary embodiment of FIG. 5 , seven fingers 13 are provided on each longitudinal side 5 , 6 . The length d is significantly greater than the height h here. Fig. 27 An embodiment is shown with four fingers 13 on each longitudinal side 5, 6. The height h of the plate 4 is Fig.23 The same is true for the exemplary embodiments up to 27. The change in length d changes the forces that can be transmitted between the concrete layers 11 and 12 and thus serves to adapt the connecting anchor 3 to the existing forces.

[0080] Fig.28 and 29 Another embodiment of a plate 4 for connecting an anchor 3 is shown, which is opposite to the plate 4 in FIG. Figures 23 to 27 The exemplary embodiment shown in has a greater height h. Accordingly, the distance c between the bottoms 30 of the opposite recesses 10 is also increased. Fig.28 and 29 The plate 4 in FIG. 1 has two fingers 13 on each longitudinal side 5 , 6 . A different number of fingers 13 on each longitudinal side 5 , 6 can also be advantageous. A greater height h allows the plate 4 to be used for an insulation layer 2 with a greater thickness. Fig.28 In an embodiment of the present invention, the height h is approximately 1 to 2 times the length d. Fig.29In the embodiment of the present invention, the height h is 5 to 10 times the length d. The dimensions of the finger 13 and the recess 10 are in accordance with Figures 23 to 29 The same as in the embodiment of FIG. Fig.29 In the embodiment of FIG. 1 , the at least one bottom 30 of the recess 10 can be arranged outside the thermal insulation layer 2 .

[0081] exist Figures 23 to 29 The exemplary embodiment shown in FIG. 2 also has curved sections 21 to 24 in its end sections 19 and 20 .

[0082] Further advantageous exemplary embodiments result from any desired combinations of the features of the exemplary embodiments shown with one another.

Claims

1. A connecting anchor for a multi-layer concrete slab, wherein the connecting anchor (3) comprises a slab (4) having a first longitudinal side (5) for arrangement in a first concrete layer (11) and a second longitudinal side (6) for arrangement in a second concrete layer (12), and a first transverse side (7) and a second transverse side (8) for connecting the first longitudinal side (5) to the second longitudinal side (6), respectively, It is characterized in that The plate (4) has an end section (19, 20) adjacent to at least one longitudinal side (5, 6), in which the plate (4) is bent out of a plate plane (27) of the plate (4) at a first bending point (21) along a first bending direction (25) and is bent at a second bending point (22) along a second bending direction (26), which runs in the opposite direction of the first bending direction (25), the plate (4) having at least two receptacles (14, 34) which are arranged at different distances (a) from the second longitudinal side (6), and a limiting element (15) for limiting an insertion depth (t) of the connecting anchor (3) into the thermal insulation layer (2) is releasably held in one of the at least two receptacles (14, 34).

2. The connecting anchor according to claim 1, It is characterized in that The plate (4) has a wave-shaped profile in the at least one end section (19, 20), which is formed by a plurality of bends (21, 22, 23, 24).

3. The connecting anchor according to claim 1, It is characterized in that The plate (4) has at least one recess (10) on the at least one longitudinal side (5, 6).

4. The connecting anchor according to claim 3, It is characterized in that The bottom (30) of the recess (10) is configured as a rounded structure.

5. The connecting anchor according to claim 3, It is characterized in that The at least one recess (10) separates the fingers (13) of the plate (4) from one another.

6. The connecting anchor according to claim 1, It is characterized in that The plate (4) has, on the at least one longitudinal side (5, 6), at least one opening (9) extending through the plate (4), wherein the opening (9) is advantageously arranged in a finger (13).

7. The connecting anchor according to claim 1, It is characterized in that One longitudinal side surface (6) is shorter than the other longitudinal side surface (5).

8. The connecting anchor according to claim 1, It is characterized in that At least one transverse side (7, 8) extends in at least one section at an angle (α) of less than 90° relative to one of the longitudinal sides (5, 6).

9. A connecting anchor for a multi-layer concrete slab, wherein the connecting anchor (3) comprises a slab (4) having a first longitudinal side (5) for arrangement in a first concrete layer (11) and a second longitudinal side (6) for arrangement in a second concrete layer (12), and a first transverse side (7) and a second transverse side (8) for connecting the first longitudinal side (5) to the second longitudinal side (6), respectively. It is characterized in that The plate (4) has at least two receptacles (14, 34) which are arranged at different distances (a) from the second longitudinal side (6), and a limiting element (15) for limiting the insertion depth (t) of the connecting anchor (3) into the thermal insulation layer (2) is releasably held in one of the at least two receptacles (14, 34).

10. The connection anchor according to claim 9, It is characterized in that The at least one receptacle (14) is arranged on a lateral side (7, 8) of the plate (4), wherein the limiting element (15) can in particular be inserted or clipped into the receptacle (14).

11. The connecting anchor according to claim 9, It is characterized in that The at least one receptacle (34) is arranged between the lateral sides (7, 8) of the plate (4), wherein the limiting element (15) is in particular designed as a two-part structure.

12. The connecting anchor according to claim 9, It is characterized in that The receptacles (14, 34) are arranged in a mirror-symmetrical manner with respect to a center surface (31) of the plate (4) extending centrally between the longitudinal sides (5, 6).

13. The connecting anchor according to claim 9, It is characterized in that One longitudinal side surface (6) is shorter than the other longitudinal side surface (5).

14. The connecting anchor according to claim 9, It is characterized in that At least one transverse side (7, 8) extends in at least one section at an angle (α) of less than 90° relative to one of the longitudinal sides (5, 6).

15. A multi-layer concrete slab comprising a first concrete layer (11), a second concrete layer (12) and an insulating layer (2) arranged between the concrete layers (11, 12) and at least one connecting anchor (3), wherein the connecting anchor (3) comprises a plate (4) having a first longitudinal side (5) and a second longitudinal side (6), wherein the first longitudinal side (5) is arranged in the first concrete layer (11) and the second longitudinal side (6) is arranged in the second concrete layer (12), wherein the plate (4) has a first transverse side (7) and a second transverse side (8), wherein the first transverse side and the second transverse side extend from the first concrete layer (11) through the insulating layer (2) into the second concrete layer (12), It is characterized in that The plate (4) has an end section (19, 20) adjacent to at least one longitudinal side (5, 6), the end section being arranged in one of the concrete layers (11, 12), and in which the plate (4) is bent out of a plate plane (27) at a first bending point (21) along a first bending direction (25) and is bent at a second bending point (22) along a second bending direction (26), the second bending direction being the opposite direction of the first bending direction (25), the plate (4) having at least two receptacles (14, 34) being arranged at different distances (a) from the second longitudinal side (6), and a limiting element (15) for limiting an insertion depth (t) of the connecting anchor (3) into the thermal insulation layer (2) being releasably held in one of the at least two receptacles (14, 34).

16. A multi-layer concrete slab comprising a first concrete layer (11), a second concrete layer (12), an insulating layer (2) arranged between the concrete layers (11, 12), and at least one connecting anchor (3), wherein the connecting anchor (3) comprises a plate (4), the plate having a first longitudinal side (5) and a second longitudinal side (6), wherein the first longitudinal side (5) is arranged in the first concrete layer (11) and the second longitudinal side (6) is arranged in the second concrete layer (12), wherein the plate (4) has a first transverse side (7) and a second transverse side (8), the first transverse side and the second transverse side extending from the first concrete layer (11) through the insulating layer (2) into the second concrete layer (12), It is characterized in that The plate (4) has at least two receptacles (14, 34) which are arranged at different distances (a) from the second longitudinal side (6), wherein a limiting element (15) is arranged in one of the receptacles (14, 34) and rests with a supporting section (16) on the thermal insulation layer (2).

17. A multi-layer concrete slab comprising a first concrete layer (11), a second concrete layer (12), an insulating layer (2) arranged between the concrete layers (11, 12), and at least one connecting anchor (3), wherein the connecting anchor (3) comprises a plate (4), the plate having a first longitudinal side (5) and a second longitudinal side (6), wherein the first longitudinal side (5) is arranged in the first concrete layer (11) and the second longitudinal side (6) is arranged in the second concrete layer (12), wherein the plate (4) has a first transverse side (7) and a second transverse side (8), the first transverse side and the second transverse side extending from the first concrete layer (11) through the insulating layer (2) into the second concrete layer (12), It is characterized in that The plate (4) has at least one recess (10) on at least one longitudinal side (5, 6), which separates two fingers (13) of the plate (4) from one another, wherein the fingers (13) extend into one of the concrete layers (11, 12) and wherein the bottom (30) of the recess (10) is arranged in the thermal insulation layer (2).

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