EP1375770A2 - Sandwich panel, assembly with two sandwich panels and a half-product for the manufacture of such a sandwich panel - Google Patents

Abstract

Sandwich panel comprises an insulating layer (5) arranged between and connected to an outer and an inner covering layer (2, 3). The outer side of the outer covering layer is covered with a sealing layer (4). The panel is joined to a further sandwich panel using a device for joining the front sides of the two panels and anchoring the two covering layers with the external borders in the insulating layers. The sealing layer is thick enough so that it softens by thermal and/or chemical treatment. Independent claims are also included for: (1) an arrangement consisting of at least two sandwich panels; and (2) a semi-finished material for the production of the sandwich panel.

Description

The invention relates to a sandwich panel with one between an outer and an inner sheet metal cover layer enclosed and with the Sheet metal cover layers connected insulation layer, the outside the outer sheet metal cover layer coated with a sealing layer is. The invention further relates to an arrangement formed from two such sandwich panels and a semi-finished product for production of such a sandwich panel.

Sandwich panels with an outer and an inner sheet metal cover layer are used as roof elements, especially for the formation of flat roofs used. The sheet metal cover layers are made of rolled steel. Such a previously known sandwich panel comprises a tabular outer one and a corresponding sheet-like inner sheet metal cover layer. There is an insulation layer between the two sheet metal cover layers made of expanded polystyrene. The polystyrene is with the two sheet metal cover layers each connected by an adhesive. On two opposite ends of the sandwich panel - den Long sides - are the sheet metal cover layers for the formation of connecting elements reshaped so that on one long side with the level of the sheet metal cover layers aligned and over the polystyrene core protruding springs are formed. These two protruding feathers include a groove. On the other long side of the sandwich panel the ends of the sheet metal cover layers are bent towards the polystyrene core formed, the polystyrene core itself forms a spring. Also on this long side, the cranked serving as connecting means are Ends of the sheet metal cover layers protruding from the polystyrene core intended. In this way, two sandwich panels can be used their complementary long sides to connect them be engaged with each other.

These sandwich panels are attached to a support, such as one Hall steel skeleton using conventional roof screws that reach through the sandwich panel and with its screw shaft in Supports are anchored.

Even if arranged by the engagement of adjacent Sandwich panels with their connecting elements create a certain connection is caused by two such sandwich panels, this type of Connection not always sufficient to get the required one under constant load To provide shear bracing. Moreover, when laying this Sandwich panels make sure that that of the polystyrene rigid foam core protruding lanyards are not damaged. If these are damaged, for example bent, then this is in accordance with the intended purpose Connection with the complementarily designed connecting means the other sandwich element is not necessarily guaranteed. In In any case, such damage can result from the sandwich elements trained vapor barrier may be impaired.

DE 198 24 597 C1 sandwich panels are known, which on their Longitudinal joints each wear two springs of different lengths, so through these two such sandwich panels for connection the same can be engaged. These sandwich elements consist of a plastic hard foam core with an outer shell a wave profile and a flat inner shell, the two Shells are made of sheet steel. Such a sandwich panel is attached on a support with fastening screws that are in the Wells of the wave profile are arranged. Can be attached such a sandwich panel also by fastening screws that immediately provided behind the springs arranged on the one longitudinal joint is. This section is defined by an overlap section of the other sandwich panels engaged with this covered. So that the two sandwich panels engaged as intended can be connected to each other, that shows the panel to be fixed a recess on the underside Take up a spring of the other sandwich panel. The disadvantage is with this sandwich panel, however, that with too much tension this fastening screw reduces the clear height of the recess can be, so that then inserting the spring of the other Sandwich element is no longer possible. From this document Known sandwich panels have no sealing membrane on the outside on.

The waterproofing membrane of the state of the art first recognized is open the outside of the outer sheet metal cover layer on a corrosion protection layer applied a 0.5 mm thick PVC layer. This can about the formation of connections or the like, with others plastic-coated objects generally also by welding get connected. When creating such connections, where there is a material connection between the two Plastic layers are to be produced by welding, However, there is a risk that the 0.5 mm thick, on the outer Sheet metal cover layer of the sandwich panel arranged plastic layer in the Area of thermal heating melts over its entire thickness and therefore holes can arise in the plastic layer.

DE 73 01 773 U describes a component for a roof covering, in particular known for a roof pitch with a slight slope. This roof component consists of a trapezoidal sheet on the underside, on which a hard foam core is applied. This component is on the top finished with a smooth sheet metal cover. On the A sealing membrane is applied to the metal cover layer. For connection of two such components along their length Profiling the trapezoidal sheets following cross joints serves a bracket, which combines the two overlapping trapezoidal sheets on the underside and is attached to the support by means of a screw. An additional backup the outer sheet metal cover layer against lifting causes this Clamp by engaging in the tongues of the upper sheet metal cover layer. The sealing membrane in this known component is on one side is longer than the other, so that with this protruding strip the distance to the neighboring component can be bridged. Disadvantageous in the subject of this Document is that at least in the lower end the trapezoidal sheet protrudes and thus the risk of damage if improper Is exposed to handling. In addition, the one in this document is suitable described connection of two components only for connecting the same along their cross joints.

The invention is therefore based on the object of a sandwich panel to propose the type mentioned at the outset compared to the previously discussed Prior art has improved properties.

According to the invention, this object is achieved by a sandwich panel, for connecting the sandwich panel to another sandwich panel the sandwich panel on one end, about its longitudinal joint Means arranged for engagement in the area of the insulation layer this end face with the end face of the further sandwich panel arranged and complementary trained means and the two sheet metal cover layers with their the longitudinal extent of the Sandwich panels following the outer ends in the insulation layer are anchored and these are at least partially used to connect to form two sandwich panels connecting means in which from the end face of the sandwich panel carrying the connecting means a fastening section which can be fixed to a support with a fastening element is arranged protruding, the fastening portion in the area of the lower end of the sandwich element arranged and with each two sandwich panels engaged through a section of the other sandwich element in Direction to the sealing layer is covered, and in which the sealing layer is of such a strength that thermal and / or chemical treatment to create a material Connection with another sealing layer or membrane too softenable without adding any material and can be connected to it.

This sandwich panel includes one between an outer and one enclosed inner sheet metal cover layer, expediently as a hard foam core trained insulation layer. The rigid foam core is for example a PU rigid foam core, which when expanded to the attached to each other facing inner sides of the sheet metal cover layers, so that for making such a sandwich panel and in particular none for connecting the sheet metal cover layers to the hard foam core additional glue is needed. The insulation layer can also made of a non-combustible material, consisting of web-oriented mineral fibers, be formed. Grip the longitudinal joint of the sandwich panel the sheet metal cover layers with their terminations in the insulation material, for example the PU rigid foam core, so that the Sheet metal cover layers with their free ends in a form-fitting manner in the insulation layer are anchored. As a result, not only are the free degrees the sheet metal cover layers from damage when handling a protected such sandwich panels, but in particular is on this Effective lifting of the sheet metal cover layers, such as by wind suction prevented.

In the claimed sandwich panel, it is also provided that the Sheet metal cover layers at least partially on one face of the sandwich panel form arranged connecting means. This face is expediently the longitudinal joint of the sandwich panel. The one with the other connecting means to be engaged by two to each other connecting sandwich panels are therefore at least partially from the around the sheet metal cover layers guided around the edge delimiting the flat side formed so that the connecting means, depending on the design, either formed by the correspondingly formed sheet metal cover layer or a connecting means formed from the material of the insulation layer at least partially through this section of the sheet metal cover layer is protected. These connecting means are expediently around tongue and groove arrangements. One made of rigid PU foam existing external spring is expedient overall enclosed by a sheet metal cover layer. This has the one Advantage of protecting this lanyard. In the event that Sealing membrane directly to the outer edge of the sheet metal cover layer is also guaranteed by the measure described above, that on the outside of the outer sheet metal top layer located sealing layer of a sandwich panel in immediate Attachment to that of the one to be connected to the one sandwich panel other sandwich panels. A material connection of the two sealing layers, which are expediently designed as a plastic layer through a thermal process is thus immediate feasible, especially in principle without the need an additional material feed.

The sealing membrane expediently has a thickness of more than 0.5 mm, a thickness greater than 0.8 mm (approximately to 1.5 mm) being preferred is. Basically, it can be conveniently made of plastic Sealing should also be provided more. With one out Plastic sealing provided it is possible to create a material connection with another plastic layer or web to produce this by producing a melt without fear need that over the plastic seal in the area of heating seen their material strength completely softened. In contrast to the previously known State of the art is the subject of the claimed Sandwich panels thus used a thick film, in principle the material necessary to create a connection weld already is available. The provision of such a sealing layer has furthermore the advantage that the risk of pervasive damage the plastic layer, for example by chips, for example metal chips or the like, is hardly to be feared. Thorough damage would allow moisture to penetrate under the plastic layer and thus promote corrosion.

In principle, any plastic film can be used as the plastic layer be able to meet the requirements of training a Material melt is sufficient. A high polymer is preferred as the plastic layer Plastic film used, such as one made of soft PVC, from polyolefins, from chlorinated polyethylene or from a copolymerized Plastic made of vinyl acetate and ethylene.

The subject of the claimed sandwich panel is provided for of sheet metal cover layers made of steel at least the outside of the outer Sheet metal cover layer coated with a corrosion protection layer. expedient is the metallic corrosion layer by means of a hot-dip process applied. Is preferably used as a metallic Corrosion protection layer an aluminum-zinc alloy, expediently a 55% aluminum-zinc alloy (55% by weight aluminum, 43.4 % Zinc and 1.6% silicon). Such a corrosion protection layer is up to 6 times more durable than one with the same layer thickness anti-corrosion layer formed by hot-dip galvanizing. The sheet metal cover layers can also be made of aluminum.

The sandwich panel also has one on which the connecting means supporting longitudinal joint arranged fastening section. This Fastening section protrudes beyond the connecting means, for example the Tongue and groove arrangement of this end face of the sandwich panel, see above that to attach this sandwich panel to a support from above a fastener, such as a screw, a fastener or the like, reaching through the fastening section can be. Basically there is to fix such a sandwich panel on a support also the possibility of a clamp to use that encompasses the free end of the fastening section and can be fixed on the support.

In an expedient embodiment it is provided that the longitudinal joint a second sandwich panel, which with the the fastening section load-bearing longitudinal joint of a first sandwich panel for connecting them two sandwich panels can be engaged, a cover section includes through which the fastening section and in particular the inserted Fasteners in the direction of the plastic coating two sandwich panels is covered. The provision of such a fastening section also has the advantage that the fastening screws used only a relatively small material thickness - only that of the fastening section - must reach through and thus screw movements, for example due to thermal changes in length no adverse effects on the subject of this sandwich panel on the roof that is formed with it, for example.

To create a continuous seal on the outside of a component formed from several sandwich elements can be provided be in the outside butt joint between the around the outside edge a plastic layer serving as a sealing layer Insert hollow chamber profile and this by source welding with the to materially connect adjacent plastic layers of the sandwich panels. It is also possible to add such an impact Cover the connecting plastic sheet. This connecting plastic sheet is on the underside with the top of the to be connected Welded plastic layers of the sandwich panels.

Such a sandwich panel is expediently made with a semi-finished product manufactured, which consists of a rolled steel sheet and with a metallic corrosion protection layer, in particular a 55-AI-Zn layer is coated. This steel sheet is conveniently from the reel coming coated with the plastic layer that first degreased the outside of the steel strip, then brushed and then an adhesive is applied. After flashing off the film is glued in the desired thickness, so that afterwards a steel sheet laminated with this plastic film is present. This is then cut and shaped into the desired shape brought outer sheet surface layer before this together with the in Formed brought together lower sheet metal cover layer and the Gap is filled with rigid PU foam. In the process foaming the cavity between the two sheet metal cover layers it is advisable to use the side guide bands or chains separated from the cavity by a separating layer so that the introduced Hard foam is not glued to these devices. As a separating layer can serve, for example, a paper web or the like. For the Case that the plastic layer is not up to the outer edge of the sheet metal cover layer is to be glued to this, expediently Glue onto the sheet metal cover layer using a narrower roller applied. Before the sheet laminated in this way goes through a forming process is subjected to the section not glued to the sheet the plastic film, so that the forming process is not disabled.

Fig. 1:

eine schematisierte Schnittansicht auf einen Querstoß von zwei längsseitig aneinandergrenzenden Sandwichpaneelen eingesetzt als Dachbauelemente,

Fig. 2:

einen schematisierten Querschnitt des oberen Bereiches zweier weiterer, längsstoßseitig aneinandergrenzender Sandwichpaneele,

Fig. 3:

das eine Sandwichpaneel der Figur 2 in einem schematisierten Querschnitt des oberen Abschnittes eines mittleren Bereiches mit einer darauf aufgebrachten Kunststoffplatte und

Fig. 4:

eine schematisierte Schnittansicht auf einen Querstoß von zwei weiteren, längsseitig aneinander grenzenden Sandwichpaneelen,

Fig. 5:

eine zum Teil geschnittene Ansicht auf die Längsstöße zweier querstoßseitig benachbart zueinander angeordneter Sandwichpaneele mit einer Einrichtung zum Verankern der oberen Blechdeckschicht der Sandwichpaneele gemäß einem ersten Ausführungsbeispiel,

Fig. 6:

die beiden Sandwichpaneele der Fig. 5 mit einer weiteren Einrichtung zum Verankern der oberen Blechdeckschicht,

Fig. 7:

die beiden Sandwichpaneele der Fig. 5 mit noch einer weiteren Einrichtung zum Verankern der oberen Blechdeckschicht gemäß noch einem weiteren Ausführungsbeispiel und

Fig. 8:

eine schematisierte Schnittansicht eines Querstoßes von zwei längsseitig aneinandergrenzende Sandwichpaneele gemäß einem weiteren Ausführungsbeispiel.

The invention is described below using an exemplary embodiment with reference to the accompanying figures. Show it:

Fig. 1:

2 shows a schematic sectional view of a transverse joint of two sandwich panels adjoining one another on the longitudinal side, used as roof components,

Fig. 2:

2 shows a schematic cross section of the upper area of two further sandwich panels adjoining on the longitudinal butt side,

Fig. 3:

the one sandwich panel of Figure 2 in a schematic cross section of the upper portion of a central region with a plastic plate applied thereon and

Fig. 4:

2 shows a schematic sectional view of a transverse joint of two further sandwich panels adjoining one another on the longitudinal side,

Fig. 5:

FIG. 2 shows a partially sectioned view of the longitudinal joints of two sandwich panels arranged adjacent to one another on the cross joint side with a device for anchoring the upper sheet metal cover layer of the sandwich panels according to a first exemplary embodiment,

Fig. 6:

5 with a further device for anchoring the upper sheet metal cover layer,

Fig. 7:

the two sandwich panels of FIG. 5 with yet another device for anchoring the upper sheet metal cover layer according to yet another embodiment and

Fig. 8:

a schematic sectional view of a transverse joint of two sandwich panels adjoining one another on the longitudinal side according to a further exemplary embodiment.

In the following, the sandwich panel 1 is first described for FIG. 1. The sandwich panel 1 'is constructed identically. The sandwich panel 1 comprises an inner sheet metal cover layer 2. The inner sheet metal cover layer 2 consists of a rolled steel strip, the one shown in Figure 1 lower surface - the inner visible surface - has a color coating. If desired, the sheet metal cover layer 2 can prevent corrosion on both sides be coated. The sheet metal cover layer 2 is by continuous Reshaping the edge sections of a viewed in the direction of travel Steel strip has been brought into the shape shown in Figure 1. The sandwich panel 1 further comprises an upper sheet metal cover layer 3, the one in FIG 1 shown top of a metallic corrosion layer made of a 55% aluminum-zinc alloy wearing. Missing the top sheet metal layer 3 with such a corrosion protection layer, which is expedient is applied by means of a hot-dip process is not only favorable to prevent corrosion, so the sheet metal cover layer 3 also withstands high corrosion requirements, but one such a corrosion layer is also a preferred surface to be on to apply a plastic layer 4 to this permanently by means of an adhesive. The plastic layer 4 applied to the sheet metal cover layer 3 is weatherproof. The plastic layer 4 is a foil on the rolled Steel strip from which the sheet metal cover layer 3 is ultimately formed is laminated on by using an adhesive, for example butyl rubber or like. In the illustrated embodiment, the plastic layer about 2 mm thick. The strengths of the steel bands for training the sheet metal cover layers 2, 3 used is about 0.5 mm. The thickness of the steel strips is advantageously in the range between 0.4 and 1.5 mm. The material thickness of the plastic layer 4 is designed that they are undergoing chemical and / or thermal treatment to soften them to form a plastic weld melt in the areas of such treatment of the sandwich panel 1 not removed in sections or so thin that the desired requirements to weather resistance are no longer given.

A hard foam core 5 is between the two sheet metal cover layers 2, 3 arranged, through which the sheet metal cover layers 2, 3 are connected to one another are. As a base polymer for such a rigid foam, for example Polystyrenes, polyurethanes, polyvinyl chloride and similar compounds serve. The hard foam core has a high insulation capacity, good moisture resistance and high mechanical strength.

The free ends of the sheet metal cover layers following the longitudinal extent 2, 3 and the plastic layer laminated onto the sheet metal cover layer 3 4 extend into the hard foam core 5, so that the sheet metal cover layers 2, 3 positively attached to the hard foam core 5 are.

The sandwich panel 1 carries a total of one longitudinal joint the reference number 6 marked connecting means with which the Sandwich panel 1 with complementary connecting means another sandwich panel can be engaged to two such To connect sandwich panels together. In those shown in Figure 1 Connection means 6 is a tongue and groove arrangement, consisting from two springs 7, 8 and one between the two springs 7, 8 arranged groove 9.

The longitudinal joint 10 carrying the connecting means 6 is also a fastening section 11 assigned by the longitudinal joint 10 of the sandwich panel 1 is designed to protrude further than the two springs 7, 8. The fastening section 11 is aligned with its underside with the underside of the sandwich panel 1 and is used to attach a fastener to fix the sandwich panel 1 on a support, for example a steel beam. For the sake of clarity, the support is in Figure 1 not shown. The fastener used in the illustrated Embodiment a screw 12, with a washer 13 the top of the mounting portion 11 supports. Likewise, can the fastening section 11 also with other fastening means, for example be fixed with a firing pin.

The sandwich panel 1 carries at its opposite the longitudinal joint 10 Longitudinal joint 14 also connecting means 15, which are complementary to the connecting means 6 are formed. Hence these include Connecting means 15 two grooves 16, 17 and one between the two Grooves 16, 17 arranged spring 18. The sandwich panel 1 further comprises in the area of the longitudinal joint 14 a recess 19 on the underside, through the space for receiving the mounting portion 11 and used fastener (screw 12) is created. Consequently can the edge portion of the recess located above the 19 Sandwich panels 1 are addressed as a cover section, by the fastening section 11 and the fastening means used 12 are covered towards the weather side. Consequently, the 1 shown in Figure 1 sandwich panel fixing to a support done without fully gripping the fasteners. Screw head deflections are in the illustrated embodiment therefore negligible. Since the mounting section 11 is only one has a small thickness compared to the thickness of the sandwich panel 1, can easily be attached to a sandwich panel Bearing set bolts are also used, making an attachment is possible with a machine.

The springs 7, 8 and the outer webs delimiting the grooves 16, 17, which are also referred to as springs are formed by reshaped ones Sections of the two sheet metal cover layers 2 and 3 with the rigid foam 5 filled connecting means through the sheet metal cover layers 2, 3 protected.

In the area of the cover section of the sandwich panel 1, the in Figure 1 illustrated embodiment of the lower sheet metal cover layer 2 starting from a screw S engaging in the rigid foam core 5 have been screwed in so far that these with their feet in those Section of the upper sheet metal cover layer 3 engages with which this in reaches the hard foam core 5. This screw is in Figure 1 with the Reference symbol S marked. This way is without training a thermal bridge from the outside of the sandwich panel 1 to the inside effective the inner sheet metal cover layer 2 with the outer sheet metal cover layer 3 connected, which is favorable to a transfer of Shear forces. Furthermore, this measure is marginal The sandwich panel 1 is prevented from opening, for example in the event of high wind suction. Along the longitudinal joint of the sandwich panel 1 are at a distance from each other several such screws S are provided.

Interacting with the connecting means 15 of the sandwich panel 1, the connecting means 6 'of a further sandwich panel 1' are formed. In the arrangement of the sandwich panels 1, 1 'shown clearly that each sandwich panel 1, 1 'over the respective fastening section 11, 11 'is attached to a support (not shown) and that the respective other end of the sandwich panel 1, 1 'through positive engagement of this sandwich panel 1 with one another sandwich panel 1 'is held securely.

The formation of the springs 7, 18 and the grooves 9, 16, 17 is such designed that these are tightly contiguous with each other Stand by.

In the area of the upper end of the two sandwich panels 1, 1 ' the two plastic layers 4, 4 'adjoin one another, since the plastic layers 4, 4 'in this embodiment up to the outer Extend the edge of the upper sheet metal cover layer 3. Furthermore, the illustrated embodiment for additional sealing of the butt joint between the two plastic layers 4, 4 ' a connecting plastic web 20 on the two plastic layers 4, 4 'of the sandwich panels 1, 1' welded. This welding was done by creating a plastic weld by heating the Plastic layers 4, 4 'without additional material supply to create the sweat. The connecting plastic web 20 is then on the underside previously also warmed up, put on. This way it is effective the butt joint already sealed at the top. To train a internal vapor barrier is in the groove 17 and cooperating with the spring 8 'inserted a silicone bead 21. Furthermore, instead of the silicone bead 21 in the connecting means engaged with each other formed cavity 22 a Compriband to form the desired vapor barrier.

With the sandwich panel 1, even larger spans can be seen appropriate design of the sheet metal cover layers and the one used Bridging rigid foam without additional structural elements, for example Trapezoidal sheets would have to be used. For this purpose the Sheet metal cover layer 2 and / or sheet metal cover layer 3, for example, by a ruling - Macrolined and / or microlined - be structured. In any case forms the underside of the sandwich panel 1 when the Sandwich panels 1 as a roof component, for example for training an appealing visible surface of a hall roof without the underside of the roof formed from these elements in addition to creation an appealing light surface would have to be processed. In which described sandwich panel, it is due to the good static properties possible to anchor only in steel girders, so that there is no visible surface on the underside of the sandwich panel protruding fasteners, e.g. screws protrude.

FIG. 2 shows two further together in a schematic longitudinal section engaged sandwich panels 23, 23 '. The sandwich panels 23, 23 'each have an upper sheet metal cover layer in the sandwich panels 23 designated by the reference numeral 24, which is a parallel is lined to the longitudinal joint. Through this ruling recesses 25 and Increases 26 formed. The ruling helps increase the static Properties of the sandwich panels 23, 23 '.

The upper plastic layer 27 is in the sandwich panels 23, 23 ' (only referred to the sandwich panel 23) laminated, the one free strips 28 not connected to the upper sheet metal cover layer 24 wearing. This strip 28 serves as a connecting and overlap strip and is used in the border of the longitudinal joint before it is used Recess 25 added, as shown in Figure 2. each Sandwich panel 23, 23 'is in the area of its two opposite Longitudinal joints formed in this way. In the area of a connection joint 29 between two sandwich panels 23, 23 'there are thus two connecting and strips 28, 28 'serving overlap strips. Basically, to bridge the connection joint 29 both strips 28, 28 'successively corresponding to those shown in Figure 2 Opened the directions of the arrow, with the upper sheet metal cover layers 4 and also connected to each other by welding. In dependence of the inclination of the sandwich panels 23, 23 'is that shown in FIG Design the possibility of either the strip 28 or the Arrange strips 28 'at the top so that the connection between the two strips 28, 28 'with regard to flowing water in the Leeward side is located.

FIG. 3 shows the upper end of the sandwich panel in a longitudinal section 23, on which a translucent (or also a transparent) Plastic plate 30 applied and for example by source welding with the plastic layer 27 in the region of the elevations 26 of the ruling connected is. Thus, the depressions through the plastic plate 30 25 of the lines covered. This through the plastic plate 30 covered depressions 25 are shown in FIG Embodiment used as channels to contain a liquid, for example To let water circulate. At the cross joints of the sandwich panel 23 are through the recesses 25 and the plastic plate 20 channels formed are mutually connected, whereby an inlet is provided at one end and an outlet is provided at the other end is. This way one is on top of the sandwich panel 23 meandering water flow can be generated. As a result of the relative small deepening of the wells 25 and their coverage by the Plastic plate 30 heats the water carried in the channels, so that in this way the arrangement described as an absorber is designed for water heating. Are several sandwich panels 23 in the area of their adjoining cross joints connected, then the edge channel connection elements are located each on the outside of multiple sandwich panels 23 built roof or roof segment.

Instead of using a plastic plate, as described for FIG. 3, can also another plastic film on the plastic layer 27 be applied, which also only partially with the plastic layer 27 of the sandwich panel 23 is connected to a path for the To train water. When using a plastic film instead of the figure 3 described plastic plate basically needs the upper Sheet metal cover layer to form channels not lined or otherwise to be structured. With such a configuration, the channels through the connecting lines between the plastic film and the plastic layer of the sandwich panel.

For the formation of an absorber of the type described The panels described are suitable for hot water preparation the formation of the plastic layer as a waterproofing membrane in particular. Nevertheless, it is possible, even on conventional sandwich panels or other roofing elements that have a top waterproofing membrane have such an absorber in the same way and thus without mandatory use of the sandwich panels described above build.

FIG. 4 shows two further adjoining longitudinal ends and in Intervention sandwich panels 23 ". The sandwich panels 23" are basically constructed like the sandwich panels 1, 1 'of Figure 1. In the Sandwich panels 23 "end the respective one provided as an illumination path Plastic layer 27 'in each case before the longitudinal end the facing sides of each sandwich panel 23 ". The joint 29 'is bridged by a plastic strip K, which with the two end regions of the plastic layers 27 'which are adjacent to one another arranged sandwich panels 23 "approximately by source welding connected is. The plastic strip K is thus in the non-laminated Area of the sandwich panels 23 "not with the upper sheet metal cover layers of the sandwich panels 23 ". In this way and An effective expansion joint is formed so that the two Sandwich panels 23 "for thermal changes in length against each other can work without damaging the plastic layer would lead. The plastic strip K has a corresponding Elasticity.

The expansion joint formation described for FIG. 4 based on both sandwich panels 23 "engaged with each other is preferred at Sandwich panels as previously described due to the problem-free Application of the plastic strip to bridge the connection joint used. Nevertheless, it is also possible to use conventional sandwich panels or other roof components to form a to connect such expansion joints with each other, so that to form Such an expansion joint does not necessarily require the sandwich panels described above must be used. The sandwich panels are 23 " basically constructed like the sandwich panels 1, 1 'described above Figure 1.

Figure 5 shows a view of the longitudinal joints of two further sandwich panels 31, 31 'and thus in the direction of the transverse joints, the two Fastening sections 32, 32 'are shown cut. As Lanyard springs are related to the sandwich panel 31 marked with the reference numerals 33 and 34. The sandwich panels 31, 31 'are fastened on a support 35 with setting bolts 36. In the laterally open fastening section 32 or 32 'is in everyone Sandwich panel 31, 31 'an anchoring angle 37 has been taken. These anchoring angles 37 are also with the setting bolt 36 attached to the carrier 35. The anchoring angles 37 each have one exposed hook section 38. This issued Hook section 38 serves as an abutment. Attached to the abutment 38 is an anchoring portion formed in a fir tree cross section 39 one designated overall by reference numeral 40 Connection profile. The connection profile is basically T-shaped trained and spanned the between the two sandwich panels 31, 31 'formed joint 41. With their two protruding legs 42, 42 ', the connection profile 40 lies on the top of the two sandwich panels 31, 31 '.

The connection profile 40 extends over the entire extent parallel to the mutually facing transverse joints of the two sandwich panels 31, 31 '. The connecting profile 40 serves to anchor the upper one Sheet metal cover layer of the two sandwich panels 31, 31 '. In the area the anchoring angle 37 acts on the sandwich panels 31, 31 ' In this way, suction forces are effective in the carrier 35 or derived into the base. Thus, through the anchoring angle 37 and the connecting profile 40 means for anchoring the provided upper sheet metal cover layer of the sandwich panels 31, 31 '.

To cover the connection profile 40 is used in the illustrated Embodiment a plastic sheet 43, with the plastic seal 44, 44 'of the sandwich panels 31, 31' is welded.

FIG. 6 shows two further sandwich panels 45, 45 'with a further device for anchoring the upper sheet metal cover layer of the two sandwich panels 45, 45 '. The anchoring angles 37 'have in the figure 6 shown embodiment on the mutually facing sides Corrugation 46 on. At their pioneering and to each other Sandwich element 45 or 45 'in which the anchoring angle 37 'are anchored, pointing sides carry a sawtooth trained anchoring section 47. The connecting profile 40 'carries underside two anchoring legs 48, 48 'with a complementary to the sawtooth-like design of the anchoring sections 47 of the anchoring angle 37 ', the sawtooth-like formation in the anchoring legs 48, 48 'is arranged facing each other. Through the Anchoring leg 48, 48 'is thus created a groove open on the underside, which follows the longitudinal extent of the connecting profile 40 '. The Orientation of the anchor is designed so that the connection profile 40 'by the engagement of the sawtooth-like anchoring sections 47 of the anchoring profiles 37 'secured against lifting is. The cavity between the two cross joints of the sandwich panels 47, 47 'is filled with a heat-insulating foam, which is also in the mutually facing sides of the anchoring sections between the anchoring angles 37 'and the anchoring legs 48 or 48 'extends. For this purpose, the distance between the anchoring legs 48, 48 'designed from each other so that the anchoring angle 37' with their anchoring sections 47 are held with play therein. Through the Elasticity of the anchoring sections 47 of the anchoring angles 37 ' and also the anchoring leg 48, 48 'of the connecting profile 40' the connection profile can easily be attached. in principle In this embodiment, the same advantages result as these have already been described for the exemplary embodiment in FIG. 5.

In the embodiment shown in Figure 6, the connection profile is also 40 'connected with rivets 49 to the sandwich panels 45, 45'. The rivets 49 pass through the upper sheet metal cover layer and are set in the rigid foam core. In the longitudinal direction of the cross joint several rivets 49 are provided in order to connect the connecting profile 40 'to the to connect two adjacent sandwich panels 45, 45 '. The connecting the sandwich panels 45, 45 'with the connecting profile 40' the total length of the transverse joint is reduced for large ones Spans a bending of the sandwich panels 45, 45 '. Through this Measure is a rigid joint and a continuous effect is achieved.

FIG. 7 shows a view of the two on the cross joint side adjacent to one another arranged sandwich panels 45, 45 ', which instead of the connecting profile 40 'are anchored by another connecting profile 40 ". The connecting profile 40 "is T-shaped and lies with his two legs 42 "on the top of the adjacent to each other Sandwich panels 45, 45 '. The connection profile 40 "carries a downwardly projecting clamp web 50, the outside of which facing sides are corrugated. The described for the figure 7 Embodiment used anchoring angle 37 "on their upward-pointing thighs one for each Sandwich panel 45, 45 'cranked clamping portion 51. Through the two clamping sections 51 of the two anchoring angles 37 "thus creates a receptacle in which the bracket web 50 of the connecting profile 40 "engages The back of the anchoring bracket 37 "is also finely ribbed. As a thermal separation between the clamping web 50 of the Connection profile 40 "and the two anchoring angles 37" is between a plastic web 52 is used for each of the elements mentioned. The entire cavity between the two sandwich panels 45, 45 'located joint 53 is with a local foam, such as a polyurethane foam filled.

In contrast to the embodiment described in FIG. 6, in which by connecting the connecting profile 40 'with its two legs 42 'to the two sandwich panels 45, 45', whereby the connection is designed to be rigid, in the embodiment of FIG Connection profile 40 "only with rivets 49 'with the one sandwich panel 45 connected. In this way, a joint joint is formed. In both Cases - both in the case of FIG. 6 and in the case of FIG. 7 Design - becomes the supporting moment in the upper sheet metal cover layer dissolved in train and below in pressure.

Both in the embodiment of Figure 6 and also in the embodiment 7 shows a connection between the connection profile 40 or 40 "and the anchoring angles anchored on the support side 37 'or 37 "secured by inserting a screw be the two in the case of the embodiment of Figure 6 Anchoring legs 48, 48 'and the two anchoring sections 47 and in the case of the exemplary embodiment in FIG. 7, the two clamping sections 51 and reaches through the clamping web 50. A such screw is conveniently inclined into the engaged Anchoring elements used.

The use of plastic-coated connecting profiles can also be useful be, for example, by using sweat welding agents the two adjacent sandwich panels.

The described for the embodiments of Figures 5, 6 and 7 Cross joint anchoring is particularly suitable for connecting sandwich panels as described for the embodiment of Figure 1 are because due to the waterproofing membrane a Cross-bridging plastic strips can be applied. Nevertheless, transverse impacts can also occur in the manner described connected by conventional sandwich panels or roof construction elements , so that a cross joint anchoring as in the Embodiments of Figures 5, 6 and 7 are not necessarily shown a use of the sandwich panels described above is.

In the event that fire resistance is to be included in the roof structure is, for example, by connecting Velcro strips, for example by welding onto the upper sealing membrane Sandwich elements are made, these Velcro elements serve one Keep the roofing membrane with an underside of felt. The felt layer serves as a fire retardant. In such an embodiment, the Velcro connections to hold the fire retardant roofing membrane against Wind uplift. This additional roofing membrane becomes extensive, on an entire roof made up of several sandwich panels, is applied with the waterproofing membrane of the sandwich panels welded. The are suitable for creating such a roof structure to sandwich panels described in particular, since then the used Velcro tapes easily welded to the waterproofing membrane can be. Nevertheless, it is also possible Roof structure using other sandwich panels or Realize roof components without necessarily using the described sandwich panels would be necessary.

FIG. 8 shows two to be engaged with one another on the longitudinal butt side Sandwich panels 54, 54 '. As with the one shown in FIG. 1 The embodiment with the sandwich panels 1, 1 'is the upper one Sheet metal cover layer 55 or 55 'and the lower sheet metal cover layer 56, 56' their anchoring in the hard foam core 57 or 57 'and anchored in it. The edge formation of the sheet metal cover layers 55, 55 ', 56, 56 'is designed in the manner of an expanded metal. The trained as expanded metal Sections are shown in FIG. 8 with respect to the sheet metal cover layers 55, 55 ', 56, 56 'shown in dashed lines. The expanded metal or expanded metal sections the sheet metal cover layers 55, 55 ', 56, 56' serve for better clamping with the respective hard foam. In the embodiment shown in Figure 8 it is additionally provided that the two sheet metal cover layers 55, 55 'and 56, 56' of the sandwich panels 54, 54 'with each other are hooked and thus engaged. The interlocking area is identified by the reference numbers 58 and 58 '. By the The two sheet metal cover layers thus support each other a sandwich panel, so basically on a screw like this to the sandwich panels 1, 1 'for connecting the sheet metal cover layers is described, can be dispensed with. Training the take over edge portions of the sheet metal cover layers 55, 55 ', 56, 56' the function of a reinforcement, as known from concrete construction is. This interlocking of the two respective sheet metal cover layers a sandwich panel 54, 54 'is in particular also a so-called "Creeping of the foam" under continuous load, causing the two sheet metal cover layers moved against each other prevented. The consequence the formation of these mutually engaged portions of the two Sheet metal cover layers of a sandwich panel 54, 54 'is a thermal bridge free Connection created. By engaging on the long side or hooking the upper sheet metal cover layer 55, 55 'with the respective lower sheet metal cover layer 56, 56 'is through these cover layers Box created, so that by this measure an additional Load securing is created in the event that an adhesive bond between the rigid foam core and the two sheet metal cover layers has not properly adjusted or given in. It takes place thus a transverse distribution of the applied moments.

The exemplary embodiment described for FIG. 8 is particularly suitable for anchoring the sheet metal cover layers of the sandwich panels 54, 54 ' are basically constructed like the sandwich panels 1, 1 'of FIG. 1. Nevertheless, in the manner described for FIG Sheet metal cover layers of conventional sandwich panels or roof construction elements be connected so that the description of this embodiment not necessarily to use the sandwich panels 54, 54 'is limited.

From the description of the invention it is clear that with the described Sandwich panels can be easily formed a roof can, especially without special consideration during assembly sensitive building materials, such as this is the case with the prior art. In particular is the formation of such a roof with the sandwich panels 1, 1 ' to be carried out much more quickly than a roof structure corresponding to that prior art.

The sandwich panel described is not only suitable for training a roof and thus for training as a roof component, but ultimately the sandwich panel can be used in all applications, where an outside and / or inside plastic coating is desired and in particular an effective moisture and Vapor barrier is to be formed through this plastic layer. Therefore this sandwich panel is also suitable for the formation of walls or similar.

LIST OF REFERENCE NUMBERS

1,1 '

sandwich

2

sheet metal covering layer

3

sheet metal covering layer

4, 4 '

Plastic layer

5

Rigid foam core

6, 6 '

connecting means

7

feather

8, 8 '

feather

9

groove

10

long side

11, 11 '

fastener

12

screw

13

disc

14

long side

15

connecting means

16

groove

17

groove

18

feather

19

recess

20

Connecting plastic sheet

21

silicone bead

22

cavity

23, 23 ', 23 "

sandwich

24

sheet metal covering layer

25

deepening

26

survey

27, 27 '

Plastic layer

28, 28 '

strip

29, 29 '

connection joint

30

Plastic plate

31.31 '

sandwich

32, 32 '

attachment section

33

feather

34

feather

35

carrier

36

fasteners

37, 37 ', 37 "

anchor angle

38

hook section

39

anchoring section

40

connection profile

41

Gap

42

leg

43

Plastic sheet

44, 44 '

Plastic seal

45, 45 '

sandwich

46

knurl

47

anchoring section

48, 48 '

anchor leg

49, 49 '

rivet

50

Verklammerungssteg

51

Verklammerungsabschnitt

52

Plastic web

53

Gap

54, 54 '

sandwich

55, 55 '

upper sheet metal cover layer

56, 56 '

lower sheet metal layer

57, 57 '

Rigid foam core

58, 58 '

Verhakungsbereich

K

Plastic strips

S

screw

Claims (25)

Sandwich panel with an insulating material layer (5) enclosed between an outer and an inner sheet metal cover layer (2, 3; 24) and connected to the sheet metal cover layers (2, 3; 24), the outside of the outer sheet metal cover layer (3, 24) having a sealing layer ( 4) is coated, characterized in that to connect the sandwich panel (1; 23, 23 "; 31, 31 '; 45, 45'; 54, 54 ') to another sandwich panel (1', 23 ', 23") the sandwich panel (1; 23, 23 "; 31, 31 '; 45, 45'; 54, 54 ') on one end face, for example its longitudinal joint (10) in the region of the insulation layer (5), means for engaging this end face (10, 14) the end face of the further sandwich panel (1 ', 23', 23 ") has arranged and complementary means and the two sheet metal cover layers (2, 3; 24) with their longitudinal extent of the sandwich panel (1, 1 '; 23, 23', 23 "; 31, 31 '; 45, 45'; 54, 54 ') are anchored in the insulation layer (5) following the outer terminations and these at least partially for connecting two sandwich panels (1, 1'; 23, 23 ', 23"; 31, 31 '; 45, 45'; 54, 54 ') form connecting means, from the end face (10) of the sandwich panel (1, 1 '; 23, 23', 23 "; 31, 31 '; 45, 45'; 54, 54 ') carrying the connecting means with a fastening element (12) on a support fixable fastening section (11, 11 '; 32, 32') is arranged projecting, the fastening section (11, 11 '; 32, 32') in the area of the lower end of the sandwich element (1, 1 '; 23, 23', 23 "; 31, 31 '; 45, 45'; 54, 54 ') is arranged and in each case with two sandwich panels (1, 1'; 23, 23 ', 23''which are engaged with one another); 31, 31'; 45, 45 '; 54, 54') is covered by a section of the other sandwich element in the direction of the sealing layer (4; 27, 27 '; 44, 44'), and the sealing layer (4; 27, 27 '; 45, 45') has such a thickness that it can be thermally and / or chemically treated to create a material connection with a further sealing layer (4, 4 ';26;27; 45 , 45 ') or web can also be softened and connected to it without adding material. Sandwich panel according to claim 1, characterized in that the sheet metal cover layers (2, 3; 24; 55, 56; 55 ', 56') consist of rolled steel sheet and at least the outside of the outer sheet metal cover layer is coated with a metallic corrosion protection layer. Sandwich panel according to claim 2, characterized in that the metallic corrosion protection layer is applied by means of a hot-dip process. Sandwich panel according to claim 2 or 3, characterized in that the metallic corrosion protection layer is an aluminum-zinc alloy, in particular an aluminum-zinc alloy with an aluminum content of 50 to 60 wt .-%, 38 to 50 wt .-% Zinc and 1 to 2% by weight silicon, in particular a 55% aluminum-zinc alloy. Sandwich panel according to one of claims 1 to 4, characterized in that the plastic layer (4, 4 ';27; 45, 45') is a plastic film applied to the sheet metal cover layer (3; 24; 55, 55 ') in a thickness between 0, 5 mm and 2 mm, in particular greater than 0.8 mm. Sandwich panel according to one of claims 1 to 5, characterized in that the plastic layer consists of one of the following materials: soft PVC, polyolefins, chlorinated polyethylene or a copolymerized plastic made of vinyl acetate and ethylene. Sandwich panel according to one of claims 1 to 6, characterized in that a permanent adhesive for attaching the plastic layer (4, 4 '; 27, 27'; 44, 44 ') to the outer sheet metal cover layer (3; 24; 55, 55') , for example butyl rubber is used. Sandwich panel according to one of Claims 1 to 7, characterized in that the sandwich panel (1, 1 '; 23, 23', 23 "; 31, 31 '; 45, 45'; 54, 54 ') on the longitudinal joint (10 ) with the connecting means (6) opposite longitudinal joint (14) complementary to the connecting means (6) of the first longitudinal joint (10) designed connecting means (15) and that this longitudinal joint (14) comprises a cover section through which two each with each other Engaged sandwich panels (1, 1 '; 23, 23', 23 "; 31, 31 '; 45, 45'; 54, 54 ') the fastening section (11') of the first sandwich panel (1 ') towards the plastic coating covers the outer sheet metal cover layer (3; 24; 55, 55 '). Sandwich panel according to one of Claims 1 to 8, characterized in that the section in the outer sheet metal cover layer (3) which projects into the insulation layer (5) with its outer termination is connected to the inner sheet metal cover layer (2). Sandwich panel according to claim 9, characterized in that a screw (S) resting on the underside of the inner sheet metal cover layer (2) serves to connect the section of the outer sheet metal cover layer (3) projecting into the insulation layer (5). Sandwich panel according to one of the preceding claims, characterized in that the insulation layer is a rigid foam, in particular one made of polyurethane. Sandwich panel according to one of Claims 1 to 11, characterized in that the upper sheet metal cover layer (24) is lined parallel to the longitudinal joint, pocket-like depressions (25) being formed by this lining and the plastic layer (27) being laminated onto the sheet metal cover layer ( 24) is only connected to the sheet metal cover layer (24) into the recess (25) bordering a longitudinal joint and has an unconnected strip (28, 28 ') which projects beyond the longitudinal joint of the sandwich panel (23, 23'). Sandwich panel according to one of claims 1 to 12, characterized in that the upper sheet metal cover layer (24) of the sandwich panel (23) is lined to form depressions (25) and elevations (26) and a plastic plate on the sandwich element (23) or on Sandwich elements (23) existing field is placed and connected to the plastic layer (27) and the channels formed in this way by the recesses (25) are alternately connected at the ends to provide an absorber system. Sandwich panel according to one of Claims 1 to 13, characterized in that, in order to form an expansion joint between two sandwich panels (23 ") which are in engagement with one another, the plastic layer (27 ') ends before the connecting joint (29'). Sandwich panel according to claim 13, characterized in that for anchoring the connecting profile (40 ") this carries an underside clamping web (50) which engages in a receptacle formed by two anchoring angles (37") and by a thermal separation element (52) from each Anchoring angles (37 ") is separated. Sandwich panel according to claim 15, characterized in that the engaged position between the clamping web (50) of the connecting profile (40 ") and the two anchoring angles (37") is secured by a bolt, a screw or the like. Sandwich panel according to one of claims 1 to 16, characterized in that the sheet metal cover layers (55, 56; 55 ', 56') are anchored at their two longitudinal joints in the hard foam core (57, 57 '). Sandwich panel according to claim 17, characterized in that in the anchoring sections the sheet metal cover layers (55, 56; 55 ';56';) are designed as expanded metal (expanded metal) and the upper sheet metal cover layer (55, 55 ') with the lower sheet metal cover layer (56, 56 ') is hooked. Arrangement consisting of two sandwich panels (31, 31 '; 45, 45') adjacent on the transverse joint side according to one of Claims 1 to 18, characterized in that one in each case in the mutually facing sides of the two sandwich panels (32, 32 '; 45, 45') Anchoring bracket (37, 37 ') is used and is fastened to the support (35) with the anchoring of the fastening section (32, 32') and these anchoring bracket (37, 37 ') carry locking means (38, 47) on which complementary locking means (39; 48, 48 ') of a connection profile (40, 40') which is in contact with one leg (42, 42 ') on the upper side of the adjacent sandwich panels (31, 31'; 45, 45 '), whereby the connecting profile (40, 40 ') is secured against lifting off by the interlocking means which cooperate with barbs. Arrangement according to claim 19, characterized in that the anchoring angles (37 ') each have a sawtooth-shaped anchoring section (37) and the connecting profile (40') carries two anchoring legs (40, 40 ') which protrude on the underside, so that the two adjacent anchoring angles ( 37 ') can be inserted into the groove which is open on the underside and is formed by the anchoring angles (48, 48'). Arrangement according to claim 19 or 20, characterized in that the legs (42, 42 ') of the connecting profile (40, 40') are connected to the respective sandwich element (31, 31 '; 45, 45') approximately by rivets (49) , Arrangement comprising two sandwich panels (1, 1 ') which are in engagement with one another on the end faces according to one of Claims 1 to 18, characterized in that in the butt joints of the two adjacent sandwich panels (1, 1') in the region of the adjacent sealing layers (4, 4 ') a source weldable hollow chamber profile is arranged. Semifinished product for the manufacture of a sandwich panel according to one of claims 1 to 14, characterized in that the semifinished product is a rolled steel sheet provided with an aluminum-zinc alloy serving as a corrosion protection layer, over the length of which a plastic sheet as a sealing layer with a thickness between 0, 5 and 2.5 mm, in particular greater than 0.8 mm, permanently connected to the steel strip, laminated on, the plastic used for the plastic sheet being chemically and / or thermally softenable to form a weld. Semifinished product according to claim 23, characterized in that the plastic web is laminated onto the steel sheet leaving an edge region free. Semifinished product according to claim 23 or 24, characterized in that the edge region of the steel sheets are designed as expanded metal, which are designed to interlock after shaping.

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