EP3947856B1 - Supporting structure of plastic construction for a formwork panel - Google Patents

Description

• dass die Tragstruktur einen Hauptkörper aus Kunststoff, zu dem die zwei Längsrandträger und die zwei Querrandträger gehören, und im Bereich der Vorderseiten der zwei Längsrandträger und/oder der zwei Querrandträger einen Kantenschutz aufweist, der zum Schützen mindestens eines Teils der Kante der Schalhaut nach deren Anbringung an der Tragstruktur vorgesehen ist, wobei der Kantenschutz aus einem von dem Material der genannten Träger der Tragstruktur unterschiedlichen Material ist und einen von dem betreffenden, genannten Träger nach vorn vorragenden Bereich hat; und/oder
• dass die Tragstruktur einen Hauptkörper aus Kunststoff, zu dem die zwei Längsrandträger und die zwei Querrandträger gehören, und im Bereich der Vorderseiten der zwei Längsrandträger und/oder der zwei Querrandträger, und/oder im Bereich der Rückseiten der zwei Längsrandträger und/oder der zwei Querrandträger, eine Verstärkung aus einem von dem Material der genannten Träger der Tragstruktur unterschiedlichen Material aufweist.

The subject of the invention is a support structure in plastic construction for a formwork panel, which has a support structure and a formlining positioned on the front of the support structure and attached to the support structure, the support structure having two longitudinal edge supports and two transverse edge supports, characterized in that

• that the support structure has a main body made of plastic, to which the two longitudinal edge beams and the two transverse edge beams belong, and in the area of the front sides of the two longitudinal edge beams and / or the two transverse edge beams has an edge protection, which is used to protect at least part of the edge of the formlining after it has been attached is provided on the support structure, the edge protection being made of a material different from the material of said support of the support structure and having an area projecting forward from the relevant said support; and or
• that the support structure has a main body made of plastic, to which the two longitudinal edge supports and the two transverse edge supports belong, and in the area of the front sides of the two longitudinal edge supports and / or the two transverse edge supports, and / or in the area of the rear sides of the two longitudinal edge supports and / or the two transverse edge supports , a reinforcement made of a material different from the material of the said support of the support structure.

DE 3810613 A1 discloses a profile bar in the manner of a support, which is intended as a component for the frame of formwork panels to be used in concrete construction. This profile bar has, as a central part, a profile body made of plastic, on the top and bottom of which profile pieces made of metal are arranged as reinforcements, which complement the cross section of the profile body and, with the help of internally attached webs, in a force-fitting and/or positive manner in groove-shaped recesses the top and bottom of the profile body are anchored.

Support structures in plastic construction for formwork panels are known. Compared to supporting structures made of wood or metal, they have a whole range of advantages: high durability, low weight, low aging, inexpensive Production and cheap recyclability. On the disadvantage side, it should be noted that in order to achieve high strength values, effort is required in the construction, and the practical design of the transition to the formlining is a challenge.

In this application, the term “edge of the formlining” is understood to mean the outline surface of the formlining, extending from the front of the formlining (which is the shaping surface for the concrete) to the back of the formlining. The term "edge of the formlining" is not intended to denote the line at which the surface of the front of the formlining intersects with the outline surface of the formlining, and is not intended to describe a line at which a virtual plane is located on the back of the formlining, parallel to the front of the formlining, intersects with the outline surface of the formlining.

The invention includes a support structure for a formwork panel according to claim 1, a formwork panel according to claim 10 and a method for producing a support structure according to claim 15. Further embodiments of the invention are given in the dependent claims.

According to a first aspect, the support structure according to the invention has an edge protection for protecting at least part of the edge of the formlining after it has been attached to the support structure. The edge of the formlining is a comparatively sensitive formlining area where damage can occur relatively easily, whether when erecting formwork from formwork panels positioned close together or when handling the formwork panels in rough construction site operations. This sensitivity is particularly pronounced when formwork panels with a plastic support structure are used. According to its first aspect, the invention creates a support structure with very effective provisions for protecting the edge of the formlining to be attached to the support structure. The protruding area of the edge protection mentioned at the beginning can protrude so far that the outline of the formlining is protected right up to the transition into the front of the formlining. There are embodiments of the support structure according to the invention in which no part of the edge of the formlining remains unprotected, i.e. the edge protection is correspondingly complete.

According to a second aspect, the support structure according to the invention has, in the area of the front sides of the two longitudinal edge supports and/or the two transverse edge supports, and/or in the area of the rear sides of the two longitudinal edge supports and/or the two transverse edge supports, a reinforcement made of a material that is different from the material of the said supports of the support structure. The provision of such reinforcement does indeed complicate the support structure. On the advantage side, however, there is an increase in the load capacity of the support structure, which is achieved in a lower weight manner than would be possible, for example, through increased use of plastic material in the support structure. The reinforcement in the area of the front sides of the two longitudinal edge supports and/or the two transverse wheel supports can also be designed as the edge protection described. Or described from a different perspective: The edge protection described can be designed in such a way that it also has the function of reinforcement in the relevant areas of the supporting structure.

There are embodiments in which the support structure according to the invention has an edge protection and / or a reinforcement, which consists of a separately manufactured part or of several separately manufactured parts, which is combined with the support structure main body after its production or . become. However, it is alternatively possible to incorporate the edge protection and/or the reinforcement into the relevant area of the main body during the production of the support structure main body.

The support structure according to the invention, as disclosed in the previous part of the description, can additionally be characterized in that the edge protection and / or the (relevant) reinforcement contains several strips of material. The expression "the (relevant) reinforcement" was chosen because in the first paragraph of the description two types of reinforcement are mentioned, namely a reinforcement assigned to the front of the support structure (or the front sides of the two longitudinal edge beams and / or the front faces of the two transverse edge beams). , and a reinforcement assigned to the back of the support structure (or the backs of the two longitudinal edge beams and / or the back sides of the two transverse edge beams). The construction of the edge protection and/or the (relevant) reinforcement from strips of material offers the advantage of being inexpensive to produce. In addition, the material strips can be used specifically where edge protection and/or reinforcement are most needed.

An alternative possibility is that the edge protection and/or the (relevant) reinforcement has the shape of a rectangular frame. This edge protection and/or this reinforcement is particularly comprehensive in its function, and the frame can be combined very efficiently with the main body of the supporting structure.

It is emphasized that hybrid solutions of the two aforementioned options are also possible, in particular edge protection (which is also reinforcement for the front of the support structure) as a frame and reinforcement made of several strips of material for the back of the support structure. The exemplary embodiments below will demonstrate this even more clearly.

The support structure according to the invention, as disclosed in the previous part of the description, can additionally be characterized in that the edge protection - seen in a cross-sectional plane perpendicular to the longitudinal extent of the carrier in question - has a first leg essentially parallel to the front of the carrier in question and a second leg, which projects forward from the first leg. This structure optimally brings together the functions of combining the edge protection with the supporting structure main body and protecting the edge of the formlining. The design can be such that the edge protection essentially only contains these two legs or consists of these two legs. Alternatively, the edge protection can have something else, for example a third leg which projects backwards from the first leg.

The support structure according to the invention, as disclosed in the previous part of the description, can also be characterized in that the reinforcement in question - seen in a cross-sectional plane perpendicular to the longitudinal extent of the support in question - has a lying rectangular cross-section. The term "lying rectangular cross-section" means that - viewed in the cross-sectional plane mentioned - the cross-section of the reinforcement has a longer dimension measured parallel to the front or back of the main body and a shorter dimension (in most cases a significantly shorter dimension) measured perpendicular thereto . Reinforcements with this geometry are particularly easy to produce and can be combined with the main body.

As far as the material of the edge protection according to the invention and/or the (relevant) reinforcement according to the invention is concerned, metal or elements made of long fiber-reinforced plastic are good options. For metal, steel or light metal (in particular aluminum, aluminum alloys and magnesium) are possible. The edge protection or its parts and/or the reinforcement(s) or their parts can be sheet metal parts. When it comes to elements made of long fiber-reinforced plastic, thermoset plastic parts with embedded long fibers, e.g. glass fibers, aramid fibers and carbon fibers, are particularly mentioned.

At this point it is stated that, according to the invention, reinforcements made of metal can be made as sheet metal parts, the main plane of which is essentially parallel to the front of the main body. The edge protection according to the invention can be designed as a sheet metal part or as several sheet metal parts (each) with a bent edge for the edge protection function.

The support structure according to the invention, as disclosed in the previous part of the description, is further characterized in that the edge protection and/or the reinforcement (in question) has holes and the support in question has several extensions on its front and/or back, which each protrude into one of these holes. The row of holes can, but does not have to, be straight; The only important thing here is that several holes are provided along the relevant support for the edge protection or reinforcement. The form-fitting hole/extension interventions effect a shear-resistant anchoring of the edge protection or the reinforcement on the relevant support, so that the edge protection and the relevant support or reinforcement and the relevant support form a unit with regard to the load-carrying capacity of the support structure. In this context, “shear-resistant” means that forces that act parallel to the front of the support structure are transmitted in a form-fitting manner.

The support structure according to the invention, as disclosed in the previous part of the description, can further be characterized in that the edge protection and / or the (relevant) reinforcement is at least partially embedded in the plastic material of the relevant support. A typical example of how such an embedding can be produced is set out below in connection with a manufacturing method according to the invention. The embedding can go so far that at least the relevant part of the edge protection or reinforcement is surrounded all around by the plastic material of the relevant carrier. But you can also go less far and, for example, only embed the edge protection or reinforcement in the plastic material of the carrier on three sides and leave a fourth side uncovered by the plastic material. Embedding in the plastic material of the carrier in question can also be combined with the hole/projection intervention described in the previous paragraph.

The support structure according to the invention, as disclosed in the previous part of the description, can further be characterized in that its main body has the two longitudinal edge supports, the two transverse edge supports and a plurality of transverse intermediate supports. The design can be such that the main body has no other supports apart from these carriers or no other parts at all. However, the design can also be such that the main body has additional parts, e.g. longitudinal intermediate supports. The main body can be a one-piece plastic part. The main body may be a one-piece injection molded plastic part. The main body can be made of fiber-reinforced plastic, in particular glass-fiber-reinforced plastic.

The support structure according to the invention, as disclosed in the previous part of the description, can additionally be characterized in that the two longitudinal edge beams and / or the two transverse edge beams as double walls with two partial walls and with first connecting walls between them, which are extension planes transverse to the longitudinal extension direction of the relevant support have, are trained. Alternatively or additionally, the two longitudinal edge beams and/or the two transverse edge beams can be designed as double walls with two partial walls and with a second connecting wall between them on the front of the double wall or with a third connecting wall between them on the back of the double wall. The described double-wall configurations of the two longitudinal edge beams and/or the two transverse edge beams result in a support structure in which the material utilization of the plastic is optimized.

The support structure according to the invention, as disclosed in the previous part of the description, can additionally be characterized in that at least a partial number of the transverse intermediate supports have two partial walls which are further spaced apart from one another on the side closer to the front of the support structure than on the side further away from the front of the support structure. Viewed in a section transversely to the longitudinal direction of the transverse intermediate beam, a trapezoidal shape or a triangular shape are typical embodiments.

The support structure according to the invention, as disclosed in the previous part of the description, can additionally be characterized in that at least a partial number of the transverse intermediate supports - measured at right angles to the front of the support structure - is less high than the support structure and at the distance from the front of the support structure Side ends at a distance from the back of the supporting structure. In other words, at least a partial number of the transverse intermediate beams only takes up part of the height of the supporting structure.

The versions described in the two previous paragraphs are favorable for the utilization of plastic material.

The support structure according to the invention, as disclosed in the previous part of the description, can also be characterized in that on its front there is a support plane for the formlining, to which support plane there are areas on the front sides of the two longitudinal edge beams, areas on the front sides of the two transverse edge beams and areas on the front sides of the transverse intermediate beams contribute. In this case, after it has been attached to the support structure, the formlining is supported by the longitudinal edge beams, the transverse edge beams and the relevant transverse intermediate beams, so that formlining support can be achieved with relatively small support distances.

A further object of the invention is a formwork panel, characterized in that it has a support structure according to the invention, as disclosed in the previous part of the description, and a formlining positioned on the front of the support structure and attached to the support structure. The formlining can be made of plastic.

The formwork panel according to the invention can further be characterized in that the edge protection and / or the reinforcement provided in the area of the front sides of the relevant supports is positioned in a sandwich-like manner between the relevant supports of the support structure and the formlining and that by attaching the formlining to the support structure at the same time an attachment of the Edge protection and / or reinforcement is formed on the support structure. This is a particularly rational way of integrating the edge protection and/or the relevant reinforcement into the formwork panel. In the formwork panel according to the invention, as has been disclosed in the previous part of the description, the formlining can have clip extensions formed on its back, with which it is attached to the support structure. Alternatively, the formlining can have extensions formed on its back and the formlining can be attached to the support structure by means of screws which are screwed into at least a partial number of these extensions from the back of the support structure. “Screwed in” means that the screw in question sits positively in the material of the supporting structure. It can be self-tapping screws. If you work with screws to fasten the formlining to the support structure, it is a possibility according to the invention that at least a partial number of these screws each go through a hole in the reinforcement provided in the area of the back of the support in question, whereby this reinforcement is attached to the support structure. Thus, each screw can serve both to fasten the edge protection and/or the reinforcement provided in the area of the front sides of the relevant supports as well as to fasten the reinforcement provided in the area of the rear sides of the relevant supports

The invention does not include a method for producing a support structure according to the invention, as has been disclosed in the previous part of the description, characterized in that the edge protection is at least partially positioned and / or the reinforcement is at least partially positioned in an injection mold and during injection molding Support structure is at least partially embedded in the plastic of the support structure by overmolding. "Overmolding" refers to a method of production in which plastic, particularly during injection molding, embeds a part that has previously been inserted into the injection mold - at least on one side - in such a way that a uniform component is created in close connection between the two components.

At this point it should be noted that in this application the term edge protection collectively refers to the several components that together form the edge protection (if the edge protection consists of several components). The same applies accordingly to the reinforcement provided in the area of the front sides of the relevant supports and to that in the area reinforcement provided on the backs of the supports in question (if they consist of several components).

• Fig. 1 eine Tragstruktur für ein Schalungspaneel, in perspektivischer Darstellung und mit Blickrichtung von schräg oben auf die Vorderseite der Tragstruktur;
• Fig. 2 einen Ausschnitt von Fig. 1 in größerem Maßstab;
• Fig. 3 einen Schnitt gemäß III-III in Fig. 1;
• Fig. 4 einen Schnitt gemäß IV-IV in Fig. 2;
• Fig. 5 einen Hauptkörper der Tragstruktur von Fig. 1, nach Wegnahme eines Kantenschutzes, in perspektivischer Darstellung und mit Blickrichtung schräg von oben auf die Vorderseite des Hauptkörpers;
• Fig. 6 einen Ausschnitt von Fig. 5 in größerem Maßstab;
• Fig. 7 einen Kantenschutz, wie er in Fig. 1-4 Bestandteil der Tragstruktur war, in perspektivischer Darstellung und mit Blickrichtung von schräg oben auf die Vorderseite des Kantenschutzes;
• Fig. 8 einen Ausschnitt von Fig. 7 in größerem Maßstab;
• Fig. 9 einen Schnitt gemäß IX-IX in Fig. 7;
• Fig. 10 ein Schalungspaneel, welches aus einer Tragstruktur mit Kantenschutz und einer an der Tragstruktur angebrachten Schalhaut besteht, in einem Schnitt in Querrichtung des Schalungspaneels;
• Fig. 11 einen Ausschnitt von Fig. 10 in größerem Maßstab;
• Fig. 12 eine Schalhaut, wie sie Bestandteil des Schalungspaneels von Fig. 10 ist, in perspektivischer Darstellung und mit Blickrichtung schräg von oben auf die Rückseite der Schalhaut;
• Fig. 13 einen Ausschnitt von Fig. 12 in größerem Maßstab;
• Fig. 14 das Schalungspaneel von Fig. 10, in perspektivischer Explosionsdarstellung und mit Blickrichtung von schräg oben auf die Rückseite des Schalungspaneels;
• Fig. 15 das Schalungspaneel von Fig. 14 im zusammengefügten Zustand, in perspektivischer Darstellung und mit Blickrichtung von schräg oben auf die Schalhaut;
• Fig. 16 das Schalungspaneel von Fig.15, in perspektivischer Darstellung und mit Blickrichtung von schräg oben auf die Rückseite des Schalungspaneels;
• Fig. 17 einen Ausschnitt eines zweiten Ausführungsbeispiels eines Schalungspaneels, in einem Schnitt in Querrichtung des Schalungspaneels wie in Fig. 11;
• Fig. 18 einen Ausschnitt der bei dem Schalungspaneel von Fig. 17 vorgesehenen Schalhaut in perspektivischer Darstellung und mit Blick von schräg oben auf die Rückseite der Schalhaut, wie in Fig. 13;
• Fig. 19 einen Ausschnitt eines dritten Ausführungsbeispiels eines Schalungspaneels, in einem Schnitt in Querrichtung des Schalungspaneels, wie in Fig. 11 und 17;
• Fig. 20 einen Ausschnitt eines vierten Ausführungsbeispiels eines Schalungspaneels, welches zusätzlich eine Verstärkung im Bereich der Rückseiten der zwei Längsrandträger aufweist, in einem Schnitt in Querrichtung des Schalungspaneels, wie in Fig. 11, 17 und 19;
• Fig. 21 das Schalungspaneel von Fig. 20, in perspektivischer Explosionsdarstellung und mit Blickrichtung von schräg oben auf die Rückseite des Schalungspaneels;
• Fig. 22 eine fünfte, nicht erfindungsgemäße Ausführungsform einer Tragstruktur, in einem Schnitt in Querrichtung der Tragstruktur, wie Fig. 4, 11, 17 und 19;
• Fig. 23 einen Ausschnitt des Schnitts von Fig. 22, in größerem Maßstab.

The invention and more specific embodiments of the invention are explained in more detail below using exemplary embodiments shown in the drawings. It shows:

• Fig. 1 a support structure for a formwork panel, in a perspective view and looking diagonally from above onto the front of the support structure;
• Fig. 2 a section of Fig. 1 on a larger scale;
• Fig. 3 a cut according to III-III in Fig. 1 ;
• Fig. 4 a cut according to IV-IV in Fig. 2 ;
• Fig. 5 a main body of the supporting structure of Fig. 1 , after removing an edge protection, in a perspective view and looking diagonally from above onto the front of the main body;
• Fig. 6 a section of Fig. 5 on a larger scale;
• Fig. 7 an edge protection, as in Fig. 1-4 Part of the supporting structure was, in a perspective view and looking diagonally from above, onto the front of the edge protection;
• Fig. 8 a section of Fig. 7 on a larger scale;
• Fig. 9 a cut according to IX-IX in Fig. 7 ;
• Fig. 10 a formwork panel, which consists of a support structure with edge protection and a formlining attached to the support structure, in a section in the transverse direction of the formwork panel;
• Fig. 11 a section of Fig. 10 on a larger scale;
• Fig. 12 a formlining, as is part of the formwork panel Fig. 10 is, in perspective view and looking diagonally from above onto the back of the formlining;
• Fig. 13 a section of Fig. 12 on a larger scale;
• Fig. 14 the formwork panel from Fig. 10 , in a perspective exploded view and looking diagonally from above onto the back of the formwork panel;
• Fig. 15 the formwork panel from Fig. 14 in the assembled state, in a perspective view and looking diagonally from above onto the formlining;
• Fig. 16 the formwork panel from Fig.15 , in a perspective view and looking diagonally from above onto the back of the formwork panel;
• Fig. 17 a section of a second embodiment of a formwork panel, in a section in the transverse direction of the formwork panel as in Fig. 11 ;
• Fig. 18 a section of the formwork panel from Fig. 17 provided formlining in a perspective view and looking obliquely from above onto the back of the formlining, as in Fig. 13 ;
• Fig. 19 a section of a third embodiment of a formwork panel, in a section in the transverse direction of the formwork panel, as in Fig. 11 and 17 ;
• Fig. 20 a section of a fourth exemplary embodiment of a formwork panel, which additionally has reinforcement in the area of the back sides of the two longitudinal edge supports, in a section in the transverse direction of the formwork panel, as in Fig. 11 , 17 and 19 ;
• Fig. 21 the formwork panel from Fig. 20 , in a perspective exploded view and looking diagonally from above onto the back of the formwork panel;
• Fig. 22 a fifth embodiment of a support structure, not according to the invention, in a section in the transverse direction of the support structure, like Fig. 4 , 11 , 17 and 19 ;
• Fig. 23 a section of the cut from Fig. 22 , on a larger scale.

In the Fig. 1 Support structure 2 shown has a main body 4 made of plastic and an edge protection 12 made of metal to protect the edge of a Support structure 2 formlining to be attached (see Fig. 10-16 ) on. The main body 4 is rectangular overall in plan view. The edge protection 12 has the shape of a rectangular frame when viewed from above.

In the Fig. 1 upward-facing side of the support structure 2 (or the one in Fig. 1 The upper end area of the support structure 2) is its front 80. The opposite, in Fig. 1 downward-facing side of the support structure 2 (or the in Fig. 1 The lower end area of the support structure 2) is its back 82.

The main body 2 has two longitudinal edge supports 6, two transverse edge supports 8 and, in this exemplary embodiment, a total of seven transverse intermediate supports 10. The main body 4 is a one-piece injection molded part made of plastic. The transverse edge beams 8 lie at right angles to the longitudinal edge beams 6 and are approximately half as long as the longitudinal edge beams 6. The transverse intermediate beams 10 run parallel to the transverse edge beams 8. In the exemplary embodiment shown, the longitudinal edge beams 6 have a length of slightly less than 2 m - measured on the outside over everything and the transverse edge supports 8 have a length of just under 1 m - measured on the outside - of slightly less than 1 m. Other formats of the main body 4 are possible. Further geometric details of the supports 6, 8, 10 are described below.

The edge protection 12 can be seen in more detail in the Fig. 2 , 3, 4 . The edge protection 12 is in one piece and has the shape of a rectangular frame with a large free interior space, the four sections 14 of the edge protection 12, each adjoining one another at the corner, each having a width 16 - measured transversely to the longitudinal extent of the section 14. The width 16 is so large that the relevant section 14 almost completely covers the width of the associated longitudinal edge support 6 or the width of the associated transverse edge support 8. Further details on this are described below. Seen in a cross-sectional plane perpendicular to the longitudinal extent of the relevant carrier 6 or 8 (siege 3 and 4 ), the relevant section 14 of edge protection 12 has the shape of a lying rectangle with a bent-up, lateral edge 18 along the relevant outer edge of the support structure 2. The in the 3 and 4 Vertically measured thickness 20 of the cross-sectional rectangle is small compared to the width 16. The edge protection 12 is a sheet metal part (sheet thickness = thickness 20) which has been punched out and bent up all around the edge. Apart from the edge 18, the edge protection 12 lies parallel to the front 80 of the support structure 2, on which front 80 a formlining will be positioned to create a formwork panel.

In Fig. 2 You can see particularly clearly that each of the four sections 14 of the edge protection 12 has a series of, for example, round holes 22 along its outer edge. In the illustrated embodiment there are thirty-nine holes along each longitudinal section 14 and twenty holes 22 along each transverse section 14. As best shown in 5 and 6 As seen, each longitudinal edge support 6 and each transverse edge support 8 has a row of short extensions 24, which are circular in plan view. The positioning and size of the extensions 24 are coordinated with the holes 22 of the edge protection 12. When joining the main body 4 and the edge protection 12, the extensions 24 each go into one of the holes 22, as is best done in Fig. 3 sees. This multiple hole 22/extension 24 engagement creates an overall positive fixation of the edge protection 12 with the front 80 of the main body 4, this positive connection being effective with regard to forces that act parallel to the front of the main body 4.

Each of the four sections 14 of the edge protection 12 has a series of holes 16 which are rectangular in plan view. The holes 26 are positioned along the inner edge of the edge protection 12. In total, in this exemplary embodiment there are nine holes 26 along each longitudinal edge support 6 and five holes 26 along each transverse edge support 8.

Particularly clear in the 3 and 4 one can see a longitudinal edge beam 6 in a section transverse to the longitudinal extent of the longitudinal edge beam 6. Each of the transverse edge beams 8 looks the same in a section at right angles to its longitudinal extent. The cross-sectional shape of the edge supports 6 and 8 can be described as a double wall with two partial walls 28 and 30 which extend between the front and the back of the main body 4. On the back 82 of the main body 4, the two partial walls 28 and 30 are connected to one another by a third connecting wall 32 lying parallel to the front side 80 of the main body 4. On the front 80 of the main body 4 there is no connecting wall lying in the plane of this front 80. In the area of the front side 80 of the main body 4, each longitudinal edge support 6 and each transverse edge support 8 has a flange 34 directed outwards (ie directed away from the center of the main body 4). The extensions 24 described are provided on the front of the flange 34. The edge protection 12 rests with its first leg 36, which is parallel to the front side 80 of the main body 4, on the front side of the flange 34 and covers the space between the two partial walls 28 and 30. The first leg 36 ends on the outward-facing side of the inner partial wall 30, but could also rest on the front side of the inner partial wall 30. On the outside, the first leg 36 is so wide that it protrudes a short distance beyond the end of the flange 34 before it merges into a second leg 37 (= bent-up edge 18), which runs at right angles to the first leg 36. The transition from the first leg 36 into the second leg 37 is a curve with a relatively small bending radius. In Fig. 6 one can see that in the longitudinal edge beams 6 and in the transverse edge beams 8 the two partial walls 28 and 30 are connected to one another by a series of spaced, first connecting walls 38. The first connecting walls 38 each have an extension plane which lies at right angles transversely to the longitudinal extension direction of the relevant support 6 or 8.

Like best in Fig. 4 can be seen, the rectangular holes 26 of the edge protection 12 are positioned so that they lie in front of the free space between the two partial walls 28 and 30. Holes 40 are provided in the third connecting wall 32, each at a position aligned with the position of a rectangular hole 26. The function of the pairs of holes 26 and 40 is described below.

The 5 and 6 show the main body 4 without the edge protection 12, so that you can see into the space between the two partial walls 28 and 30 at the longitudinal edge walls 6 and the transverse edge walls 8.

In the Fig. 7, 8, 9 the edge protection 12 is shown on its own.

The Figures 10, 11 , 14 , 15 , 16 , 17 , 19 , 20 , 21 , 22, 23 show a formwork panel 50 as it was produced by attaching a formlining 52 to the previously described support structure 2 or to the support structure 2 yet to be described in the second to fifth embodiments. In the exemplary embodiment shown, the formlining 52 is made of plastic and has the shape of a plate with extensions 60 to be described below on its inside Fig. 10 downward facing back. This plate has a small thickness of a few centimeters compared to its plan view size of essentially 2 x 1 m. The formlining 52 has such a top view size that it fits tightly onto and into the edge protection 12, with an edge region 54 of the formlining 52 resting all around on the first leg 36 of the edge protection 12 and the front end of the inner partial wall 30 and with the edge 56 of the Formlining 52 all around the second leg 37 or bent edge 18 of the edge protection 12 is bordered. The second leg 37 of the edge protection 12 projects so far forward from the front of the relevant longitudinal edge beam 6 or transverse edge beam 8 that the edge 56 of the formlining 52 is just completely covered. In the Fig. 10 The upward-facing front of the formlining 52 lies in the same plane as that in 10 and 11 upper end of the second leg 37 of the edge protection 12.

The already mentioned rear extensions 60 of the formlining 52 are positioned and dimensioned so that they each fit into one of the described holes 26 of the edge protection 12. The shape of the extensions 60 is best seen on the Fig. 11 and 13 . Adjacent to the back of the formlining, the extensions have 60 for part of their - in 10 and 11 measured vertically - length has a rectangular shape with which they each fit tightly into one of the holes 26. For the rest of the length, the relevant extension 60 is cylindrical on the outside with two small stiffening ribs. The extension 60 in question is hollow on the inside for at least part of its length. For each pair of extension 60 and hole 40 in the third connecting wall 32 of the two partial walls 28 and 30 of the relevant longitudinal edge support 6 or transverse edge support 8 is from the in Fig. 10 A screw 62 is screwed in on the lower back 82 of the support structure 2 or the formwork panel 50. With her in 10 and 11 In the upper end region, the screw 62 is screwed into a cavity 59 of the associated extension 60 and is thus positively connected to the inner circumference of the cavity 59. The head 64 of the screw 62 sits at the rear end of the relevant hole 40 in the third connecting wall 32. The screws 62 thus pull the formlining 52 with the flat part of its back against the first leg 36 of the edge protection 12, the inner partial wall 30 of the edge supports 6 and 8, and, as will be described in more detail below, the front sides of the transverse intermediate supports 10. As a result, the edge protection 12 is clamped in exactly the same position between the main body 4 and the formlining 52.

If you Fig. 1 and 14 If you take a look at it, you can see that the transverse intermediate supports 10 - seen in a section transverse to their longitudinal extent - have a cross section in the form of an open trapezoid. The open, larger trapezoid side is located on the front 80 of the main body 4. The shorter, closed trapezoid side 67 is located approximately halfway between the front 80 and the back 82 of the main body 4. On the open trapezoid side there is one on the left and one on the right narrow flange 68, which extends in the direction of length of the main body 4 protrudes (see Fig. 2 ). Each transverse intermediate beam 10 has four connecting walls 70 distributed over its length. The width of each transverse intermediate support 10 - measured in the longitudinal direction of the main body 4 - is essentially the same size as the clear distance between two adjacent transverse intermediate supports 10 or between the last transverse intermediate support 10 and the relevant transverse edge support 8. The front sides of the flange 68 lie in the same plane such as the front of the first leg 36 of the edge protection 12 and the front end of the inner partial wall 30 of the edge supports 6 and 8. All of this together is located in a common plane, which serves as a support plane or in total as a support surface for the formlining 52.

The exploded view of the Fig. 14 shows again how the components main body 4, edge protection 12, formlining 50 are put together using the screws 62. The Fig. 15 and 16 illustrate the formwork panel 50 in the fully assembled state.

The second embodiment of the 17 and 18 differs from the exemplary embodiment described so far in that the two partial walls 28 and 30 of the longitudinal edge supports 6 and the transverse edge supports 8 on the front of the double wall are connected by a second connecting wall 72, which is parallel to the front 80 of the main body 4. A third connecting wall 32, as was present in the first exemplary embodiment, is not present in the second exemplary embodiment. In the second exemplary embodiment, the extensions 60 are designed as clip extensions 60 on the back of the formlining 52. Instead of the rectangular holes 26, round holes 74 are provided in the edge protection 12. The formlining 52 is connected to the support structure 4 in a less labor-intensive manner in that its clip extensions 72 are inserted through the described holes 74 in the edge protection 12 and through holes 76 aligned therewith in the relevant second connecting wall 72. When fully inserted, the end regions of the clip extensions 60 diverge elastically and snap into place behind the back of the second connecting wall 72 in question.

At the in Fig. 19 shown, third embodiment, the width 16 of the edge protection 12 is smaller than in the previous embodiments. The edge protection 12 no longer extends over the free space between the two partial walls 28 and 30 of the relevant longitudinal edge support 6 or transverse edge support 8. As in the first exemplary embodiment, each edge support 6 or 8 is on the back a third connecting wall 32 is provided, but no second connecting wall 72, as was present in the second exemplary embodiment. The rear extensions 60 of the formlining 50 are designed so that they fit tightly into the free space between the two walls 28 and 30 of the edge beam 6 and 8 in question. As in the first exemplary embodiment, screws 62 extend from the back of the main body 4 into a cavity 59 of an extension 60.

This in Fig. 20 and 21 The fourth exemplary embodiment shown differs from the first exemplary embodiment in that a reinforcement 84 is provided in the area of the rear sides of the longitudinal edge supports 6. The reinforcement 84 includes two strip-shaped elements 86 made of metal. In this exemplary embodiment, the strip-shaped elements 86 are each punched out of sheet metal. The strip-shaped elements 86 are each as long as the longitudinal edge supports 6 on their back. The strip-shaped elements 86 each have a row of 39 holes 22. A rear extension 24 of the relevant longitudinal edge support 6 protrudes into 30 of these holes 22, as has been described in the first exemplary embodiment for the front 80 of the support structure 2. In the exemplary embodiment of Fig. 20 and 21 However, the holes 22 are located approximately in the middle of the width 16 of the strip-shaped element 86 in question.

A screw 62 passes through the remaining 9 holes 22, which are distributed over the length of the relevant strip-shaped element 86. A hole 88 is provided in the third connecting wall 32 at points that are aligned with these holes 22 for screws 62. The screw head 64 of each of these screws 62 is located on the back of the relevant strip-shaped element 86. The screws 62 thus pull the formlining 50, the edge protection 12, the main body 4 and the strip-shaped elements 86 of the reinforcement 84 together as a sandwich.

In the fifth exemplary embodiment, which is not according to the invention Fig. 22 and 23 A front edge protection 12 and a rear reinforcement of the support structure 2 are provided. This exemplary embodiment differs from the previously described exemplary embodiments primarily in that the edge protection 12 and the reinforcement 84 have been combined with the main body 4 of the support structure 2 by so-called overmolding. For this purpose, four angle rail-like metal parts 90, which adjoin one another at the corner to form the edge protection 12, are positioned in an injection mold in such a way that essentially only the relevant second leg 37 of the edge protection 12 was not inside the mold cavity of the injection mold. In the case of the reinforcement 84, two strip-shaped elements 86 have been positioned in the mold cavity of the injection mold so that they are almost completely enclosed by the injected plastic when the mold cavity is closed. The four angle rail-like parts 90 each have a miter bevel at their two ends, so that the second legs 37 of these parts as a whole form a protruding edge to protect the edge 56 of the formlining 50.

In Fig. 23 you can see that both the angle rail-shaped parts 90 and the strip-shaped elements 86, each distributed over the length, have several holes 92. To position the angle rail-shaped parts 90 and the strip-shaped elements 86 in the injection mold, these parts were placed on stepped positioning pins, one pin per hole 92. To remove the support structure 2 together with edge protection 12 and reinforcement 84 from the mold cavity after injection molding, they are pulled Positioning pins back. The positioning pins leave small round holes 94 in the plastic of the support structure 2. Instead of the angle rail-shaped parts 90, you can also position a frame-shaped part in the injection mold.

In all of the exemplary embodiments described, the edge protection 12 also forms a reinforcement in the area of the front sides of the two longitudinal edge supports 6 and the two transverse edge supports 8. According to the second aspect mentioned at the beginning, the invention also creates a support structure 2 in which there is no edge protection 12, but only on the front side and/or rear reinforcement of the support structure 2 or the longitudinal edge support 6 and/or the transverse edge support 8 is provided. For this purpose, one can imagine, for example, that instead of the edge protection 12, two or four strip-shaped elements are provided, which are designed similarly to the described strip-shaped elements 86 on the back or which are designed similarly to the edge protection 12, but without a protruding edge 18.

It should be noted that the edge protection 12 does not necessarily have to cover the two longitudinal edges of the formlining 50 and the two transverse edges of the formlining 50. For example, for formwork panels 50 in which only the longitudinal edges of the formlining 50 or only the transverse edges of the formlining 50 are particularly at risk of damage, it may be sufficient to provide edge protection only on these edges.

It is also pointed out that the reinforcement 84, which in the exemplary embodiments described was only provided in the area of the longitudinal edge supports 6, is also "all around", i.e. both on the longitudinal edge supports 6 (front and/or back) and on the transverse edge supports 8 ( front and/or back).

In the invention, the particularly metallic edge protection represents the most externally protruding area of the support structure 2 or the formwork panel 50 and thus provides particularly effective protection for the edge 56 of the formlining 50. The front reinforcement and / or the rear reinforcement 84 can be through Parts can be formed, the dimension of which - measured at right angles to the front of the support structure 2 - is smaller than the dimension measured in the direction parallel to the front of the support structure 2. The front reinforcement and/or the rear reinforcement 84 can be applied to the area of the front of the support structure (or the front of the two longitudinal edge supports and/or the two transverse edge supports) and/or to the area of the rear of the support structure 2 (or the area of the Back of the two longitudinal edge beams and / or the two transverse edge beams) be concentrated so that they optimally provide an increase in the strength of the support structure 2.

The described reinforcement 84 in the area of the back of the longitudinal edge beam 6 reinforces both the outside of the outer partial wall 28 in its rear end region and the rear end of the double wall of the longitudinal edge beam 6, which increases the stability against damage in these two areas.

The cut of the Fig. 3 has shown the engagement of the extensions 24 in the holes 22. Such interventions also exist in the second, third and fourth exemplary embodiments, but in front of and behind the drawing plane Fig. 17 or 19 or 20.

If you make the edge protection 12 and/or the reinforcement 84 from long fiber reinforced plastic instead of sheet metal, these parts will look quite similar to the sheet metal parts shown, perhaps with small roundings instead of sharp corners and slightly thicker in the perpendicular to the front 80 of the support structure 2 measured dimension.

Claims (14)

1. A supporting structure (2) of plastic construction for a formwork panel (50), which comprises the supporting structure (2) and a formwork skin (52) positioned on the front side (80) of the supporting structure (2) and attached to the supporting structure (2),

   wherein the supporting structure (2) comprises a main body (4) made of plastic with two longitudinal edge supports (6) and two transverse edge supports (8) and comprises, in the region of the front sides of the two longitudinal edge supports (6) and/or of the two transverse edge supports (8), an edge protection (12) provided for protecting at least part of the edge of the formwork skin (52) after attachment thereof to the supporting structure (2), wherein the edge protection (12) is made of a material different from the material of said supports of the supporting structure (2) and has a portion (37) projecting forward from the respective said support (6; 8); and/or wherein the supporting structure (2) comprises a main body (4) made of plastic with two longitudinal edge supports (6) and two transverse edge supports (8) and comprises, in the region of the front sides of the two longitudinal edge supports (6) and/or of the two transverse edge supports (8) and/or in the region of the rear sides of the two longitudinal edge supports (6) and/ or of the two transverse edge supports (8), a reinforcement (84) made of a material different from the material of said supports (6; 8) of the supporting structure (2),

   characterized in that the edge support front sides, provided with the edge protection (12) and/or with the reinforcement (84), and/or the edge support rear sides, provided with the reinforcement (84), have respective series of extensions (24), which protrude from the respective front side or rear side and which project into holes (22) in the edge protection (12) or the reinforcement (84), respectively.
2. The supporting structure (2) according to claim 1,
   characterized in that the edge protection (12) and/or the (respective) reinforcement (84) includes a plurality of material strips or has the shape of a rectangular frame.
3. The supporting structure (2) according to claim 1 or 2,
   characterized in that the edge protection (12) - as seen in a cross-sectional plane perpendicular to the longitudinal extension of the respective support (6; 8) - has a first leg (36) substantially parallel to the front side of the respective support (6; 8) and a second leg (37) projecting forward from the first leg (36).
4. The supporting structure (2) according to any one of claims 1 to 3,
   characterized in that the respective reinforcement (84) has a horizontal rectangular cross-section - as seen in a cross-sectional plane perpendicular to the longitudinal extension of the respective support (6; 8), wherein the longer dimension of the rectangular cross-section is parallel to the front side (80) or to the rear side (82) of the main body (4) of the supporting structure (2).
5. The supporting structure (2) according to any one of claims 1 to 4,
   characterized in that the edge protection (12) and/or the (respective) reinforcement (84) is made of metal or of long fiber reinforced plastic.
6. The supporting structure (2) according to any one of claims 1 to 5,
   characterized in that the edge protection (12) and/or the (respective) reinforcement (84) is at least partially embedded in the plastic material of the respective support (6; 8).
7. The supporting structure (2) according to any one of claims 1 to 6,
   characterized in that the main body (4) thereof comprises the two longitudinal edge supports (6), the two transverse edge supports (8) and a plurality of transverse intermediate supports (10), wherein preferably at least a partial number of the transverse intermediate supports (10) comprises two partial walls that are spaced further apart from one another on the side closer to the front side (80) of the supporting structure (2) than on the side further away from the front side (80) of the supporting structure (2).
8. The supporting structure (2) according to any one of claims 1 to 7,
   characterized in that the main body (4) thereof is an integral plastic part.
9. The supporting structure (2) according to any one of claims 1 to 8,

   characterized in that the two longitudinal edge supports (6) and/or the two transverse edge supports (8) are formed as double walls with two partial walls (28, 30) and with first connecting walls (38) therebetween, which have planes of extension transverse to the longitudinal extension direction of the respective support (6; 8); and/or

   in that the two longitudinal edge supports (6) and/or the two transverse edge supports (8) are formed as double walls with two partial walls (28; 30) and with a second connecting wall (72) therebetween on the front side of the double wall or with a third connecting wall (32) therebetween on the rear side of the double wall.
10. A formwork panel (50),
    characterized in that it comprises the supporting structure (2) according to any one of claims 1 to 9 and a formwork skin (52), preferably made of plastic, positioned on the front side (80) of the supporting structure (2) and attached to the supporting structure (2).
11. The formwork panel (50) according to claim 10,
    characterized in that the edge protection (12) and/or the reinforcement (84) provided in the region of the front sides of the respective supports (6; 8) is positioned in sandwich-like manner between the front sides of the respective supports (6; 8) of the supporting structure (2) and the formwork skin (32), and in that, by fastening of the formwork skin (52) to the supporting structure (2), there is formed at the same time a fastening of the edge protection (12) and/or the reinforcement (84) to the formwork panel (50).
12. The formwork panel (50) according to claim 10 or 11,
    characterized in that the formwork skin (52) has clip extensions (60) formed on its rear side, by means of which it is fastened to the supporting structure (2).
13. The formwork panel (50) according to any one of claims 10 to 12,
    characterized in that the formwork skin (52) has extensions (60) formed on its rear side; and in that the formwork skin (52) is fastened to the supporting structure (2) by means of screws (62) which are threadedly engaged in at least a partial number of these extensions (60) from the rear side of the supporting structure (2), wherein preferably at least a partial number of said screws (62) each extends through a hole (40) of the reinforcement (84) provided in the region of the rear sides of the respective supports (6; 8), whereby said reinforcement (84) is fastened to the formwork panel (50).
14. A formwork panel (50),

    characterized in that it comprises the supporting structure (2) according to claim 9 and a formwork skin (52), preferably made of plastic, positioned on the front side (80) of the supporting structure (2) and attached to the supporting structure (2);

    in that the formwork skin (52) has clip extensions (60) formed on its rear side, by means of which it is fastened to the supporting structure (2), or extensions (60) formed on its rear side; wherein the formwork skin (52) is fastened to the supporting structure (2) by means of screws (62) which are threadedly engaged in at least a partial number of these extensions (60) from the rear side of the supporting structure (2), wherein preferably at least a partial number of said screws (62) each extends through a hole (40) of the reinforcement (84) provided in the region of the rear sides of the respective supports (6; 8), whereby said reinforcement (84) is fastened to the formwork panel (50);

    in that said clip extensions (60) or said screw-in-extensions (60) of the formwork skin (52) project into the space between the two partial walls (28, 30) of the respective support double wall;

    and in that the edge protection (12) and/or the reinforcement (84) provided in the region of the front sides of the respective supports (6; 8) is positioned in sandwich-like manner between the front sides of the respective supports (6; 8) of the supporting structure (2) and the formwork skin (32) and is clamped between the main body (4) of the support structure (2) and the formwork skin (52) attached to the supporting structure (2).

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