Intermediate layer element, stacking arrangement with intermediate layer element and use of an intermediate layer element

Abstract

Intermediate layer element (4) for separating two piece goods (3) stacked one above the other, with a flatly extending carrier plate (6) made of plastic, wherein a layer of cellular rubber (7) is arranged at least in sections on an underside (8) of the carrier plate (6).

Description

The present invention relates to an intermediate layer element for separating two piece goods stacked one above the other. These are in particular plate-shaped piece goods which have only a very small height compared to their base area.Such intermediate layer elements are fundamentally known from the prior art and serve to separate piece goods or piece goods layers arranged one above the other during palletization, so that they do not bear directly on one another. The intermediate layer element can thereby be assigned various tasks. On the one hand, it is thus ensured that, as a result of the incorporation of an intermediate layer element, the piece goods do not bear directly on one another and therefore cannot damage one another on the surfaces during transport as a result of slipping. On the other hand, the intermediate layers can also serve as stabilizing means in order to secure the stack arrangement formed therefrom during transport.Since the intermediate layer elements are usually regarded as part of the packaging of the stack arrangement, these are components which are usually designed as disposable articles and which are accordingly produced comparatively favorably. At the same time, these intermediate layer elements should also not have a great weight, since the total weight of the stack arrangement should be formed substantially by the piece goods and not via the packaging of the stack arrangement.DE 10 2009 043 877 A1 describes, against this background, intermediate layer elements which are cut from an endless belt in the course of palletization and packaging, wherein the starting material for the intermediate layer element is a film. Alternatively, it can also be paper or cardboard. Especially paper and cardboard are distinguished by particularly low costs. At the same time, these materials can be recycled particularly well.In practice, it is also known to use polyethylene (PE) spacers. If a particularly high dimensional stability of the intermediate layer is desired, an intermediate layer element made of a PE foam is used in particular, as a result of which, on the one hand, greater thicknesses can be achieved while at the same time the material usage is kept low. Corresponding intermediate layer elements then usually have thicknesses in the range between 2 and 6 mm.Although the solutions to date have in principle proved successful, it has also been shown that the known intermediate layer elements have hitherto only very little resistance to external influences. In particular, the resistance to liquids and chemicals is extremely low, especially in the case of intermediate elements made of paper and cardboard. This applies equally also to intermediate layer elements made of PE foam which, although permitting a higher degree of damping between the piece goods compared to paper and cardboard, also permit penetration of chemical substances at the same time because of the open-pore configuration. Accordingly, the intermediate layer elements frequently have to be disposed of after only one use, which is disadvantageous especially with regard to sustainability and cost efficiency. It is therefore a tendency, especially in the case of high-quality sheet-like piece goods, to provide intermediate layer elements which make possible repeated use.Against this background, the object of the invention is to specify an intermediate layer element which is distinguished from the solutions to date by a higher resistance to external influences and which can at the same time continue to be manufactured and used cost-effectively.The object and solution of this object is an intermediate layer element according to claim 1. Accordingly, it is provided according to the invention that the intermediate layer element has a carrier plate made of plastic, wherein a layer made of a cellular rubber is arranged at least in sections on an underside of the carrier plate.Although the carrier plate already has a certain dimensional stability, it is nevertheless comparatively flexible, but the basic structure of a plate is also maintained in the case of bending. This carrier plate has an upper side and an underside, wherein now a layer of cellular rubber is arranged on the underside. This layer of cellular rubber serves in particular for stabilizing and also for vibration damping of the carrier plate during transport. At the same time, the layer of cellular rubber also allows weight forces to be absorbed at least partially. Thus, it is known in a corresponding stack arrangement that the lower intermediate layer elements must withstand comparatively high weight forces, since a large number of piece goods are supported with their weight on the lower intermediate layer elements, in particular on the lowermost intermediate layer element. Cellular rubber has the advantage that it can deform to a certain extent and can thus absorb forces acting from the outside. At the same time, however, this deformation is comparatively small, so that the structure of the stack arrangement and thus also its stability is maintained.After the stack arrangement has been relieved or after the stack arrangement has been depalletized, cellular rubber additionally has the capability of returning to its original state, with the result that correspondingly formed intermediate layer elements can be reused a number of times. This also contributes to the fact that tent rubber is in principle a foamed material. However, the pores of this foamed material are formed closed both with respect to one another and with respect to the surface, so that liquids cannot penetrate into the layer of cellular rubber. Cellular rubber also has particularly good resistance to chemicals and weathering.The intermediate layer element and / or the carrier plate preferably have a length running in the longitudinal direction of between 1200 and 1800 mm, in particular between 1300 and 1700 mm. The width of the carrier plate or of the intermediate layer element in the transverse direction is preferably between 200 and 600 mm, preferably between 300 and 500 mm.A preferred development of the invention provides that the layer of cellular rubber is arranged on at least 40%, preferably on at least 50%, of the surface of the underside of the carrier plate. In principle, it is also within the scope of the invention for the layer of cellular rubber to be arranged over the full surface on the underside of the carrier plate. It should be noted here that the layer of cellular rubber is decisive for the stability of the intermediate layer element. However, since the carrier plate likewise has a certain dimensional stability, it is sufficient within the scope of the invention if a layer of cellular rubber is arranged on the carrier plate only in sections, wherein, however, at least 40% of the area of the underside is provided with a corresponding layer of cellular rubber. A larger area does indeed allow better dimensional stability of the intermediate layer element, but this also increases the production costs of the intermediate element. The invention has here recognized that even with a cover of 40%, the dimensional stability of the carrier plate and the production costs are in a suitable ratio, so that an increase of the cover is not absolutely necessary. Naturally, however, a higher cover may be required, provided that, for example, particularly heavy plate-shaped piece goods are to be stacked one above the other. In this case, a coverage of at least 50% or of at least 60% may be expedient. A covering over the entire surface can then also represent a suitable design variant.If the layer of cellular rubber is not arranged over its entire surface on the underside of the carrier plate, it is appropriate to arrange the layer of cellular rubber in a plurality of sections spaced apart from one another on the carrier plate. In this case, a preferred embodiment provides that at least two, preferably three, sections spaced apart from one another are provided. The sections are preferably spaced apart from one another in a longitudinal direction and extend in the transverse direction of the carrier plate. In this context, the longitudinal direction means the direction in which the carrier plate extends furthest. This extension is also referred to within the scope of the invention as the length of the carrier plate. Accordingly, the width of the carrier plate runs along the transverse direction.In this connection, a preferred embodiment provides that the sections extend completely in the transverse direction, so that a rib-like structure is formed accordingly. In an embodiment in which an odd number of sections are provided, these are preferably provided on the edge regions of the carrier plate and in the center of gravity of the carrier plate. This enables particularly good vibration damping.In principle, various plastics are possible as the cellular rubber, wherein a preferred configuration provides that the cellular rubber is ethylene-propylene-diene rubber (EPDM). EPDM is distinguished by a particularly high resistance to weathering and ozone. At the same time, a high thermal resistance up to at least 70° C. is also present. A further advantage is that EPDM has good chemical resistance to polar media such as water or alcohol, for example, and is also particularly dimensionally stable with respect to mechanical stresses.A preferred development of the invention further provides that the layer of cellular rubber has a thickness of between 4 and 8 mm, preferably between 5 and 7 mm. A thickness of 6 mm is particularly preferred. In this case, the layer preferably has a uniform thickness, such that all sections at which a corresponding layer of cellular rubber is provided have substantially an identical thickness. This ensures that the carrier plate cannot deflect excessively strongly in a loaded state. A substantially identical thickness in this context means that the thicknesses of the layers of cellular rubber in the sections differ from one another by less than 5%.As already explained, the dimensional stability of the intermediate layer element is significantly influenced by the layer of cellular rubber, although of course high requirements also apply to the carrier plate itself. In particular, the carrier plate must have a suitable resistance to weathering and ozone and also a suitable resistance to chemicals. At the same time, however, the material is also to be selected in such a way that the above-described properties can be made possible as cost-effectively as possible. Against this background, polystyrene (PS) has proven to be particularly suitable as material for the carrier plate. Polystyrene is a foamed plastic which is obtained by polymerization of styrene. Particular preference is given to using an extruded polystyrene (XPS). This polystyrene has a closed surface and a closed-cell structure, so that it is particularly tight against air, water and water vapor. This makes it possible to clean the surface of the carrier plate on which the plate-shaped piece goods are then arranged manually or automatically, since there is no risk of water or chemicals entering the material and decomposing it. At the same time, the material is distinguished by a particularly smooth surface. A smooth surface has the advantage here that the intermediate layer element can be gripped in a known manner by means of a suction gripper of a handling machine by generating a vacuum. This suction gripper can then grip the intermediate layer element during palleting and place it on the stacking arrangement. At the same time, removal in the course of depalletizing is also possible in the manner described.According to a preferred embodiment, the support plate has a thickness of between 1 and 4 mm, preferably between 1.5 and 3 mm. A thickness of 2 mm is particularly preferred. Due to the additionally provided layer of cellular rubber, this thickness is sufficient to enable sufficient dimensional stability of the intermediate layer element. At the same time, the entire thickness of the intermediate layer element and thus also the weight can be kept as low as possible. In particular, it is provided that the intermediate layer element has a thickness of less than 15 mm, particularly preferably less than 12 mm.In addition, it can be provided that an additional support layer is arranged on the layer of cellular rubber on a side facing away from the carrier plate, so that the layer of cellular rubber is arranged accordingly in the manner of a sandwich element between the carrier plate and the support layer. The support layer is in particular a layer of polystyrene, in particular of extruded polystyrene. The layer has a thickness of between 1 and 4 mm, preferably between 1.5 and 3 mm. A thickness of 2 mm is particularly preferred. The provision of such an additional support layer offers the advantage that, especially in connection with polystyrene, a particularly smooth surface can be effected, which can easily be cleaned manually. Owing to the greater roughness of cellular rubber compared with polystyrene, however, a configuration without a bearing layer has the advantage that slip inhibition can be effected to a particularly high degree. Accordingly, the embodiment without a compensating layer is distinguished by good slip inhibition and with a support layer by particularly simple cleanability.According to a preferred development, the layer of cellular rubber is glued to the carrier plate or the sections of the layer of cellular rubber are glued to it. Accordingly, an adhesive layer is arranged between the carrier plate and the layer of cellular rubber. The support layer can also be bonded to the layer of cellular rubber, so that a first adhesive layer is arranged between the carrier plate and the layer of cellular rubber and a second adhesive layer is arranged between the layer of cellular rubber and the support layer. The adhesive layers are in particular of the same thickness. It is preferably provided that the adhesive layer is provided via an adhesive tape, in particular via a double-sided adhesive tape. In this case, the adhesive tape can essentially serve as an assembly aid and not as a permanent connection, so that in the event of damage to individual sections of the layer of cellular rubber, the entire intermediate layer element does not have to be replaced. Rather, only the layer made of cellular rubber or individual sections can be replaced, which results in a particular advantage with regard to a cost-effective and lasting use.According to a preferred embodiment of the invention, the carrier plate has a matted surface at least on the upper side. In this context, the term upper side means a side facing away from the lower side, which side accordingly does not adjoin the layer of cellular rubber and which is provided to receive sheet-like piece goods. A matt surface is understood to mean surfaces which have a gloss unit (GU) of less than 30 GU, preferably less than 20 GU, particularly preferably less than 10 GU, measured according to ISO 2813 at an angle of 60°.A matted surface is of particular advantage since it can be detected particularly well by automated handling devices, for example robot grippers. This allows automated palletization or depalletization. At the same time, the carrier plate can have at least one identification feature on the upper side, which is characteristic of the stack arrangement to be formed therefrom or of the stack arrangement formed therefrom. For example, the identification feature can indicate the type or shape of the plate-shaped piece goods to be stacked. In particular, color coding is used as the identification feature. For example, the surface on the upper side of the carrier plate can have a specific coloring at least in sections, wherein differences in the coloring in the case of different intermediate layer elements indicate that different piece goods are to be or are packaged with these intermediate layer elements. For example, it can be a white or yellow coloration.A preferred development of the invention provides that at least the carrier plate, preferably the intermediate layer element, has lateral recesses on at least one longitudinal and / or transverse edge, starting from an essentially rectangular shape. By longitudinal edge is meant here the edges over which the carrier plate or the intermediate layer element extends in the longitudinal direction. Accordingly, the transverse edges extend in the transverse direction. For example, corresponding recesses can be provided on both longitudinal edges or also on both transverse edges. Alternatively, it is also possible to provide corresponding recesses both on both longitudinal edges and in both transverse edges. The configuration is in particular dependent on the type of piece goods to be stacked or stacked being palletized or depalletized. With the aid of the recesses, it is possible for grippers to move into the region of the recesses and thereby to be able to remove the plate-shaped piece good without gripping the intermediate layer element. Accordingly, the shape, in particular the width and length and the number and arrangement of the recesses depend on the type of gripper used or to be used. In this context, a substantially rectangular shape means that the basic shape of the carrier plate is rectangular, wherein the corners can naturally have a certain rounding.The invention furthermore also relates to a stack arrangement according to claim 23. Accordingly, the stack arrangement has at least one stack with at least two piece goods arranged one above the other, in particular plate-shaped piece goods, and one or more intermediate layer elements according to the invention, wherein at least one intermediate layer element is arranged between the piece goods. The piece goods are in particular plate-shaped piece goods, for example metal sheets or components made of metal sheets. According to such a configuration, at least one corresponding piece good lies on the upper side of an intermediate layer element, while a further piece good adjoins the layer made of cellular rubber or the support layer. In particular, it is provided that the number of intermediate layer elements corresponds at least to the number of piece goods to be stacked. Accordingly, the stack arrangement provides at least one lower intermediate layer element. In this lowermost intermediate layer element, only one piece good is arranged on the upper side of the carrier plate, while a further intermediate layer element is arranged between the at least two piece goods. In addition, an uppermost intermediate layer element can also be provided, which correspondingly forms the end of the stack arrangement in the upward direction and which adjoins a piece good exclusively via the layer of cellular rubber or via the contact layer. According to such a configuration, a number N of intermediate layer elements is provided, wherein the number N is determined according to the formula N=M+1 and wherein M corresponds to the number of piece goods or piece goods layers. It should be noted here that only one piece good layer is arranged between the intermediate layer elements, wherein this piece good layer according to a preferred embodiment consists exclusively of one piece good, in particular a plate-shaped piece good.Accordingly, the invention preferably provides that at least one lowermost intermediate layer element is arranged below a lower and / or an uppermost intermediate layer element is arranged above an upper piece good or a piece good layer.According to a preferred development of the invention, at least 20, preferably 30, very particularly preferably at least 50, piece goods or piece goods layers are arranged one above the other, wherein an intermediate layer element is arranged in each case between the piece goods or piece goods layers.A further development of the invention provides that at least a first and a second stack are provided, wherein the first stack has piece goods stacked one above the other, which differ from the piece goods of the second stack stacked one above the other, and wherein the first stack has at least one intermediate layer element, which has a different identifying feature from the at least one intermediate layer element of the second stack. It has already been explained above that the stacks of the stack arrangement can be characterized by the identification feature, which type of piece goods are provided within the stacks. The piece goods can differ from one another in terms of their type, their shape, their size or their material. However, it is also conceivable that the piece goods differ from one another in that they are provided for a different application purpose or for a different place of use. The identification feature can be configured here solely in a machine-readable manner. Particularly preferably, however, identification features are used which can also be read and understood by the user.In this context, an embodiment is particularly preferred in which the differing identification feature is a coloring at least on the upper side of the carrier plate. It is of course also possible to provide the entire carrier plate with a coloring, wherein, however, a coloring only on the upper side is sufficient so that the latter can be detected and read by the user or by a handling device.The invention is explained in more detail below with reference to drawings. The following are shown: FIG. 1 is an isometric view of a stack arrangement with intermediate layer element according to the invention FIG. 2 shows a detail of an intermediate layer element according to a first embodiment FIG. 3 shows an alternative second embodiment of an intermediate layer element according to the FIG. 2 FIG. 4 shows a plan view of the underside of the intermediate layer element according to the FIG. 3 FIGS. 5A, 5B, 5C are plan views of the underside of various intermediate layer elements with lateral recesses FIGS. 6A, 6B show stacking arrangements with different stacks which have different piece goods.FIG. 1 shows a stacking arrangement or a stack 1 of a stacking arrangement, wherein a total of eight plate-shaped piece goods 3 are arranged one above the other on a pallet 2 by way of example. The plate-shaped piece goods 3 are in particular metal plates or components made of metal plates which are spatially separated from one another in the stack 1 by intermediate layer elements 4. Accordingly, at least one intermediate layer element 4 is arranged in each case between two piece goods 3 arranged one above the other. In addition, a lowermost intermediate layer element 4 aalso lies directly on the pallet 2 and thus forms the lower termination of the stack 1. At the same time, an uppermost intermediate layer element 4 balso forms the termination of the stack 1 on an upper side of the stack 1, so that all piece goods 3 are each arranged between two intermediate layer elements 4, 4 a, 4 b.The intermediate layer elements 4, 4 a, 4 bare thereby assigned the task of protecting the piece goods 3 during transport, wherein in particular rubbing together of the piece goods 3 and thus possible material abrasion is to be avoided. In addition, the intermediate layer elements 4, 4 a, 4 bmay also be essential for the dimensional stability of the stack 1, thereby ensuring that a plurality of piece goods 3 stacked one above the other can be securely packaged and transported. In particular, it should be borne in mind that the lower intermediate layer elements 4 and in particular the lowermost intermediate layer element 4 aare under high loads, since the dead weight of all piece goods 3 or also the dead weight of the further intermediate layer elements 4, 4 bloads on the lowermost intermediate layer element 4 a. Accordingly, the intermediate layer elements 4, 4 a, 4 bmust be designed to be particularly stable and resistant. At the same time, however, the dead weight of the intermediate layer elements 4, 4 a, 4 bmay also be kept as low as possible.A further important aspect with regard to the configuration of the intermediate layer elements 4, 4 a, 4 b relates to economic efficiency. It should be noted here that the intermediate layer elements 4, 4 a, 4 bdo normally have to be provided in a large number of pieces, with the result that the material and production costs are to be kept as low as possible. It should be noted here that previously known intermediate layer elements 4, 4 a, 4 bare usually designed as disposable articles and can therefore be used only for single use. The intermediate layer elements 4, 4 a, 4 baccording to the invention now permit repeated use for the first time and can furthermore be produced at comparatively low material and production costs.FIG. 2 shows in this context a sectional representation of an intermediate layer element 4 according to the invention, which extends in the longitudinal direction L and in a transverse direction Q substantially in the form of a plate and with a rectangular cross section, wherein the maximum extension in the longitudinal direction L is referred to as length and the maximum extension in the transverse direction Q is referred to as width. The intermediate layer element has a thickness D which is less than 15 mm and wherein the thickness D of the intermediate layer element 4 is formed by different layers.FIG. 2 correspondingly shows a multilayer structure, wherein an upper side 5 is formed via a carrier plate 6. This support plate has a thickness of between 2 and 4 mm and is formed from polystyrene (PS), in particular from extruded polystyrene (XPS). Polystyrene is distinguished in particular by good resistance to weathering and ozone. In particular in the case of extruded polystyrene, a closed-pore surface is additionally formed, so that the carrier plate 6 formed therefrom also has good resistance to water and chemicals and wherein at the same time the surface 5 can be cleaned in a simple manner.The intermediate layer element 4 furthermore has a layer of cellular rubber 7, which is arranged on an underside 8 of the carrier plate 6.In particular, the layer of cellular rubber 7 is bonded to the carrier plate 6 on the underside 8.With the aid of the layer of cellular rubber 7, a particular degree of dimensional stability is imparted to the intermediate layer element 4. At the same time, cellular rubber is also distinguished by good resistance to external environmental influences and by good resistance to chemicals and liquids.The layer of cellular rubber 7 has a thickness of between 4 and 8 mm, preferably between 5 and 7 mm. Moreover, EPDM is usually used as cellular rubber.According to the embodiment in FIG. 2, the layer of cellular rubber 7 extends over the entire surface on the underside 8 of the carrier plate 6, but it is also sufficient within the scope of the invention if the layer of cellular rubber 7 extends only in sections on the underside 8 of the carrier plate 6, wherein then, however, at least 40% of the surface of the underside 8 is covered with the layer of cellular rubber 7. This ensures that even with a lower material use of cellular rubber, sufficient stability of the intermediate layer element 4 is still made possible.Such a configuration is shown by way of example in FIG. 3, wherein now the layer of cellular rubber 7 is formed by three sections 7 a, 7 b, 7 c, which are arranged one behind the other in the longitudinal direction L and are spaced apart from one another. However, the sections 7 a, 7 b, 7 cform a layer of cellular rubber 7 which extends along the entire width of the carrier plate 6 in the transverse direction Q.It is also clear from FIG. 3 that the sections 7 a, 7 care arranged at the lateral transverse edges of the carrier plate 6. The section 7 b, on the other hand, is in a central region of the carrier plate 6 and thereby stabilizes in particular the center of gravity of the carrier plate 6.This is made clear in particular by a comparative view with FIG. 4. FIG. 4 shows the intermediate layer element 4 in a plan view of the underside 8 of the carrier plate 6, wherein, in accordance with the previous explanations, three sections 7 a, 7 b, 7 cof the layer of cellular rubber 7 are arranged spaced apart one behind the other along the longitudinal direction L. Regions remain accordingly between the sections 7 a, 7 b, 7 cwhich are formed exclusively by the carrier plate 6, wherein the carrier plate 6 and the intermediate layer element 4 have a length running in the longitudinal direction 11 of between 1200 and 1800 mm, in particular between 1300 and 1700 mm. The width of the carrier plate 6 or of the intermediate layer element 4 in the transverse direction Q is preferably between 200 and 600 mm, preferably between 300 and 500 mm. Starting from such a configuration, the sections 7 a, 7 b, 7 cof the layer of cellular rubber 7 have a length running in the longitudinal direction L of between 100 and 400, in particular between 120 and 350 mm. Along the transverse direction Q, the width of the layer of cellular rubber 7 corresponds to the width of the carrier plate 6 and thus to the width of the intermediate layer element 4.Starting from FIG. 3, it can also be seen that a bearing layer 10 can also be arranged on the layer of cellular rubber. This support layer 10 is preferably formed analogously to the carrier plate 6 from polystyrene, in particular from extruded polystyrene (XPS), and enables particularly simple cleaning. In contrast, a configuration without a support layer 10 corresponding to the configuration according to FIG. 2 is advantageous when particularly good anti-slip properties are desired, since cellular rubber has a rougher surface compared to polystyrene.The intermediate layer elements 4, 4 a, 4 bin accordance with FIG. 1 or in accordance with the embodiments in FIGS. 2 to 4 should preferably be removed and / or placed in automated form by a gripping robot, in particular by an automated handling device. This is preferably effected in a known manner by means of a suction gripper which is placed accordingly on the intermediate layer element 4 and then generates a vacuum which is sufficient to hold the intermediate layer element 4 on the suction gripper. It is essential here that the surface 5 of the carrier plate 6 is smooth, since only in this way can a sufficient negative pressure be generated between the carrier plate 6 and the suction gripper.At the same time, the intermediate layers 4 can be detected well by an automated handling device particularly when the surface 5 of the carrier plate 6 is configured to be matt. It is provided here that the surface 5 has a degree of gloss of less than 30 GU, particularly preferably less than 20 GU, very particularly preferably less than 10 GU, measured according to ISO 2813 at an angle of 60°.Although the intermediate layer elements 4 are preferably to be handled via a suction gripper, it is preferably provided that the piece goods 3 arranged on the intermediate layer elements 4 can be removed by a separate gripper. Since these are preferably plate-shaped piece goods 3, they can be removed particularly easily by means of mechanical grippers. However, these mechanical grippers must then be introduced into a region of the intermediate layer element 4 which allows the grippers to pass into a region directly below the piece goods 3. Accordingly, FIGS. 5A, 5B, 5C show various embodiments which enable the engagement of a mechanical gripper.According to FIG. 5A, starting from an essentially rectangular shape of the intermediate layer element 4, lateral recesses 11 are provided on the transverse edges 9 a, 9 b,via which recesses the gripper can pass in a region below the piece goods 3. According to the embodiment shown in FIG. 5A, only one recess 11 is arranged on each transverse edge 9 a, 9 b. Of course, it is also conceivable to provide a plurality of recesses 11 on only one transverse edge 9 a, 9 b.According to FIG. 5B, two recesses 11 are provided on a longitudinal edge 12 a, 12 bin each case, so that the plate-shaped piece good 3 engages the longitudinal edges 12 a, 12 bin a manner corresponding to the gripper.FIG. 5C shows a combination of the embodiments according to FIGS. 5A and 5B, wherein recesses are provided both on the longitudinal edges 12 a, 12 band on the transverse edges 9 a, 9 b.According to embodiments 5A, 5B, 5C, it is furthermore the case that the recesses 11 are provided on the longitudinal edges 12 a, 12 bin a region at which no sections 7 a, 7 b, 7 cof the layer of cellular rubber 7 are provided, so that in this region exclusively recesses 11 are provided on the carrier plate 6.FIGS. 6A, 6B show a first stack 1 aand a second stack 1 bwhich differ from one another with regard to the piece goods 3 arranged one above the other. This distinction can be made, for example, in the manner of the piece good 3. Differences also exist in the shape or material. Alternatively, they can also be simply different application purposes or sites of use. In this connection, it should be noted that in all the examples shown in the figures, one piece good 3 in each case forms a piece good layer which is arranged between two successive intermediate layer elements 4.In order to identify a distinction between the piece goods 3, the intermediate layer elements 4, 4 a, 4 bmay be formed with different upper sides 5 or the upper sides 5 of the intermediate layer elements 4, 4 a, 4 bmay have a different identification feature 13. In a comparison between FIGS. 6A, 6B, it is evident that the characterizing distinguishing features 13 on the surfaces 5 of the intermediate layer elements 4, 4 a, 4 bare characterized by a different pattern, which can be recognized, for example, automatically or else by a user. Alternatively, it can also be a different coloring. For example, the interlayer elements 4, 4 a, 4 bof the first stack 1 acan have a white color and the interlayer elements 4, 4 a, 4 bof the second stack 1 bcan have a yellow color. It is thus possible to distinguish the piece goods 3 arranged in the first stack 1 afrom the piece goods 3 arranged in the second stack 1 b.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2009 043 877 A1

[0004]

Claims

Intermediate layer element (4) for separating two piece goods (3) stacked one above the other, having a flat carrier plate (6) made of plastic, wherein a layer made of a cellular rubber (7) is arranged on an underside (8) of the carrier plate (6) at least in sections.The intermediate layer element (4) according to claim 1, wherein the layer of cellular rubber (7) is arranged on at least 40% of the area of the underside (8) of the carrier plate (6).The intermediate layer element (4) according to claim 2, wherein the layer of cellular rubber (7) is arranged on at least 50% of the area of the underside (8) of the carrier plate (6).The interlayer element (4) according to any one of claims 1 to 3, wherein the layer of cellular rubber (7) is arranged on the support plate (6) in a plurality of spaced-apart sections (7a, 7b, 7c).The interlayer member (4) according to any one of claims 1 to 4, wherein the cellular rubber is ethylene-propylene-diene rubber (EPDM).The interlayer element (4) according to any one of claims 1 to 5, wherein the layer of cellular rubber (7) has a thickness of between 4 and 8 mm.The interlayer element (4) according to claim 6, wherein the layer of cellular rubber (7) has a thickness between 5 and 7 mm.The interlayer element (4) according to any one of claims 1 to 7, wherein the support plate (6) is formed of polystyrene (PS).The intermediate layer element (4) according to any one of claims 1 to 8, wherein the support plate (6) has a thickness between 1 and 4 mm.The intermediate layer element (4) according to claim 9, wherein the support plate (6) has a thickness between 1.5 and 3 mm.The intermediate layer element (4) according to any one of claims 1 to 10, wherein the layer of cellular rubber (7) has a support layer (10) on a side facing away from the carrier plate (6).The spacer element (4) according to claim 11, wherein the support layer is made of polystyrene.Intermediate layer element (4) according to one of Claims 1 to 12, wherein the carrier plate (6) has a matted surface at least on the upper side (5).The interlayer element (4) according to claim 13, wherein the matted surface has a gloss value of less than 30 GU according to ISO 2813 at an angle of 60°.The interlayer element (4) according to claim 14, wherein the matted surface has a gloss value of less than 20 GU according to ISO 2813 at an angle of 60°.The interlayer element (4) according to claim 15, wherein the matted surface has a gloss value of less than 10 GU according to ISO 2813 at an angle of 60°Intermediate layer element (4) according to one of Claims 1 to 16, wherein the carrier plate (6), starting from a substantially rectangular shape, has lateral recesses (11) on at least one longitudinal and / or transverse edge (12a, 12b, 9a, 9b).Intermediate layer element (4) according to claim 17, wherein the carrier plate (6) has lateral recesses (11) on opposite longitudinal and transverse edges (12a, 12b, 9a, 9b) starting from a substantially rectangular shape.The intermediate layer element (4) according to any one of claims 1 to 18, wherein the carrier plate has a length extending in the longitudinal direction of between 1200 and 1800 mm.The spacer element (4) of claim 19, wherein the support plate has a longitudinal length between 1300 and 1700 mm.The intermediate layer element (4) according to any one of claims 1 to 18, wherein the carrier plate has a width extending in the transverse direction of between 200 and 600 mm.The spacer element (4) according to claim 21, wherein the carrier plate has a width extending in the transverse direction between 300 and 500 mm.Stack arrangement having at least one stack (1a, 1b) of at least two piece goods (3) arranged one above the other and one or more intermediate layer elements (4) according to one of Claims 1 to 22, wherein at least one intermediate layer element (4) is arranged between the piece goods (3).Stack arrangement according to Claim 23, wherein a lowermost intermediate layer element (4a) is arranged below a lower and / or an uppermost intermediate layer element (4b) is arranged above an upper piece good (3).Stack arrangement according to claim 23 or 24, wherein at least 20, in particular at least 30, piece goods (3) are arranged one above the other and wherein an intermediate layer element (4) is arranged in each case between the piece goods (3).Stack arrangement according to one of Claims 23 to 25, having at least one first and one second stack (1a, 1b), wherein the first stack (1a) has piece goods (3) stacked one above the other, which differ from the piece goods (3) of the second stack (1b) stacked one above the other, and the first stack (1a) has at least one intermediate layer element (4) which has a different identification feature (13) compared with the at least one intermediate layer element (4) of the second stack (1b).The stacking arrangement according to claim 26, wherein the different identification feature (13) is a coloring at least on the top side (5) of the carrier plate (6).The stacking arrangement according to any one of claims 23 to 27, wherein the stacked piece goods (3) are metal sheets.

Images