Transport and storage system for metal coils

Abstract

The invention relates to a transport and storage system for metal coils for receiving, in particular horizontal, cylindrical sheet metal coils, wherein at least one module (8, 9) is provided, which is formed from a stack of corrugated cardboard, wherein the tops (1, 4, 6) of the corrugated cardboard layers are orientated such that they extend substantially perpendicular to a receiving surface (11) of the module (8, 9), wherein the transport and storage system has at least one base module (8) and at least one insert module (11) for insertion into the base module (8), wherein the insert module (9) has contact surfaces (10) for contact with the base module (8) and receiving surface (11) for receiving the metal coil.

Description

[0001] Transport and storage system for metal coils

[0002] The invention relates to a transport system for metal coils, in particular steel sheet coils.

[0003] Steel or other metal sheets are typically produced by rolling a slab of the corresponding metal material, usually produced by melting and casting the steel material into the slab form, into a flat steel sheet strip or metal sheet strip. For this purpose, a corresponding metal slab passes through a rolling mill with corresponding rolling stands, with the thickness of the slab and later of the sheet decreasing from stand to stand.

[0004] Using sheet steel as an example, this occurs in such a way that the slab, which typically weighs between 20 and 40 tons, is first heated in a pusher-type furnace to ensure that the slab reaches a very high temperature, allowing for deformation. This slab is then first pre-rolled in a reversing roughing stand and, after reaching a target thickness, is passed through a hot rolling mill with a number of hot rolling stands while still red-hot.

[0005] The end result is a hot-rolled strip, the thickness of which can range from a few millimetres up to a few centimetres.

[0006] In order to produce a thin sheet from this hot strip, this hot strip is then rolled in a cold rolling mill to the target sheet thickness, whereby the target sheet thickness for thin sheet to be used in the automotive industry, for example, is between 0.3 and 1 mm.

[0007] Since the width of these strips is regulated, the thickness change from slab to hot-rolled strip to cold-rolled strip results in the continuous sheet metal strip becoming very long, so that at the end of the rolling process, both the hot-rolled and cold-rolled strip processes, it is wound into coils. The sheet or cold-rolled strip can also be coated after cold rolling. Metallic coatings, such as a hot-dip galvanized coating, are typically applied using the hot-dip process.

[0008] For this purpose, these strips are unwound, passed through a galvanizing process and then rewound.

[0009] Such steel coils can weigh up to the weight of the slab, but multiple coils can also be produced from one slab, so the weight of the coiled coil can typically be between 4 t and 40 t. After any coating process, especially a galvanizing process, the weight of the coil may increase slightly.

[0010] To move such coils, specialized vehicles are used. These vehicles, which use a mandrel to reach through a longitudinal opening along the longitudinal axis of the cylindrical coil, lift the coil, and move it. Such a vehicle is known, for example, from WO2016044891. Such coils should therefore preferably be transported in a horizontal position, as this allows access to the coil eye. In an upright position, the coil eye would point toward the sky, and such access to the coil's longitudinal axis would no longer be possible.

[0011] During all handling or transport operations, it is of course important that the steel coils are not subjected to pressure at specific points, as this would result in deformation of the sheet or damage to the metallic coating layer. Such indentations are known to extend through several layers into the interior of the coil. These areas can therefore no longer be classified as satisfactory and must sometimes be discarded.

[0012] Such coils can, of course, be transported by truck, rail, or ship. Due to the sensitivity of the coil or sheet surface, on the one hand, and the fact that these coils are very heavy and pose a significant hazard when moving, on the other, it is necessary to transport such coils reliably, safely, but also carefully. When transporting heavy loads, especially single-piece loads, such as steel coils, particular attention must be paid to load distribution; this means that point loading or excessive axle loads can be problematic during transport. This must be observed particularly in accordance with national and international regulations for freight transport.

[0013] Even during storage at the steelworks or at the customer's premises, point loading is detrimental and should be avoided.

[0014] Several attempts have already been made to transport coils, particularly in containers.

[0015] It should be noted that due to the considerable weight of steel coils, only one to a maximum of two steel coils can be loaded per truck or per container and, particularly in the case of seagoing containers, any movement of the steel coil must be prevented, as a moving steel coil weighing 23 t will permanently destroy any outer packaging.

[0016] EP 1 907 309 B1 discloses a storage system in which metal coils are stored in Styrofoam blocks. The Styrofoam block, designed to accommodate the steel coil, has a recess corresponding to the radius of the coil and accommodates a portion of the coil's circumference so large that the steel coil cannot easily escape from this block. When multiple coils are stored, a cuboid block is inserted as a spacer between the coils and between the first and last coil and a corresponding container wall. This is intended to secure the coils in the longitudinal and transverse directions.

[0017] A comparable storage system is known from IN 20 20 23 00 82 61 Al, but it is made of different materials, such as pressed paper. AT 522 138 Al describes flexibly adapted support beams that extend through the Styrofoam blocks, as well as a central, continuous Styrofoam support beam.

[0018] From DE 10 2017 113 499 Al a transport protection for coils is known, which is made of wood, whereby a thin layer of cardboard can be present between the wood and the coil to prevent indentations in the coil.

[0019] JP2022018243 A2 describes a cardboard plug-in system designed to transport cylindrical bodies. However, this system is unsuitable for steel coils because the plug-in connections are too weak.

[0020] EP 1880899 A1 discloses a corrugated cardboard storage system in which a simple, partially cylindrical support is formed from upright laminated corrugated cardboard sheets, which are additionally coated with plastic layers. Such an arrangement is neither capable of supporting steel coils nor of holding them in place.

[0021] A comparable system is known from WO091399643 A1, in which a corrugated cardboard is supported by an upright supporting structure, also made of corrugated cardboard, with these upright supporting structures connected by sleeves. Such a design is unable to fulfill its function; it is far too unstable.

[0022] JP 2019081614A2 also discloses a plug-in system consisting of plate-like elements to surround a coil with a ribbed structure made of corrugated cardboard. Firstly, such a system is not particularly stable, and secondly, it is almost impossible to use it in confined spaces.

[0023] The object of the invention is to create a transport and storage system for metal coils that reliably stores heavy metal coils, makes them transportable, and allows for easy and problem-free disposal. In particular, such a transport and storage system should allow the metal coils to be stored in a stackable manner and transported by container or truck. This object is achieved by a transport and storage system having the features of claim 1.

[0024] Advantageous further developments are identified in the dependent subclaims.

[0025] The current state of the art systems has significant disadvantages: on the one hand, the prices for polystyrene blocks have risen considerably, and on the other hand, there are massive problems with disposal or the polystyrene blocks have to be returned, which further increases costs in international maritime trade.

[0026] Particularly in the case of sustainably produced steel such as greentec steel®, it is undesirable for sustainably produced steel to be delivered using non-sustainably produced transport systems.

[0027] Furthermore, it is essential that steel coils are stored carefully, protected, and secured against rolling away, not only during transport but also at the storage location, for example, in the steel mill or at the customer's site. A stackable storage system is particularly advantageous, meaning that a coil wrapped in corrugated cardboard can be stored on top of another coil wrapped in corrugated cardboard.

[0028] Surprisingly, it was discovered that the above requirements can be met with a transport and storage system made of corrugated cardboard.

[0029] In this case, however, the corrugated cardboard is not guided to the transported goods with its broad side, as is the usual purpose, but the orientation of the corrugated cardboard is basically chosen so that the end surfaces, which run transversely to the corrugation, face the transported or stored goods and, in this case, the coil.

[0030] Corrugated board is a pulp product made from paper. At least one smooth and one fluted paper web are glued together to create corrugated board; up to seven are possible and common. The defining characteristic of corrugated board is the flute. This gives the lightweight paper its strength by increasing the area moment of inertia. A distinction can be made between different flute types and flute combinations, each of which is more suitable depending on the requirements and application.

[0031] Corrugated cardboard is one of the most common packaging materials and is primarily used for transport packaging, such as folding cartons or slip-lid boxes. The advantage of corrugated cardboard is its lightness and stability. Thanks to its base material, paper, corrugated cardboard packaging can be easily and completely recycled, but also frequently reused. It is now quite common to use so-called heavy-duty corrugated cardboard for cardboard packaging, which is arranged firmly on a Euro pallet, for example, and can also accommodate heavy objects such as automotive parts. With clever folding patterns, such heavy-duty corrugated cardboard boxes can be folded down to a fraction of their volume, recycled, and reused multiple times.

[0032] The flute structure is the most important and decisive feature of corrugated board and gives it its particular stability and strength. The structure is such that, for example, there is a flat inner layer on which a first flute web is arranged, with an intermediate layer on the first flute web and, on this, a second flute web and, following this, an outer layer. This arrangement creates a so-called two-flute structure, whereby the first flute web can have a different flute frequency to the second flute web, which further increases stability. The advantage of the flute is, on the one hand, the considerable increase in stability that three paper webs lying on top of each other would not have, in contrast to an arrangement with an inner paper web, a flute web and an outer paper web.

[0033] As already explained, this is due to the increased area moment of inertia. Since the flute sheet is glued to both the inner and outer sheets at the flute crests, the flute sheet cannot shift. The resulting cavities ensure that corrugated board is very light relative to its volume and also has an insulating effect. In the single-wall corrugated board described above, the outer and inner sheets are glued to the flute sheet. For multi-wall corrugated boards, an intermediate sheet and an additional flute sheet are added.

[0034] Corrugated board is produced in so-called corrugating machines. Paper webs are passed through corrugating rollers and embossed using heat, moisture, and pressure. The shape of the embossed flute resembles a sine wave in cross-section. The flute types differ in their pitch (t) and flute height (h). The distance between two flute supports is the flute pitch (t). The distance between the flute trough and the flute crest is the flute height (h). In the single-flute range, the C-flute (medium flute), B-flute (fine flute), and E-flute (ultrafine or microwave flute) are among the most commonly used flute types. As already mentioned, the different flute types can also vary in the subsequent flutes of a multi-flute composite.

[0035] To give corrugated board greater stability, several layers are glued together. Typical flute combinations for double-wall corrugated board include BC flute, EB flute, or EE flute. For triple-wall corrugated board, ACA, BAA, EBC, or BBC flute combinations are commonly used.

[0036] However, within the meaning of the invention, any other combination of the known wave types is also possible and intended.

[0037] Depending on the requirements, not only the flute combination but also the paper quality for the liner paper and the flute can be selected.

[0038] For liner paper, so-called kraftliner or testliner can be used, while for corrugated paper, so-called semi-cellulose or cellulose paper can be used.

[0039] Single-wall or double-wall corrugated board is used for shipping lighter shipments. Triple-wall corrugated board offers appropriate protection for heavy and fragile goods and can be used as an alternative to wood systems. Especially during export, a wide variety of climatic conditions prevail, which triple-wall board usually withstands without problems. Surprisingly, it has been shown that, in combination with adhesives, single-wall and especially double-wall corrugated board can prove to be the most suitable solution for the application in terms of the combination of dead weight and load-bearing capacity. Therefore, single-wall or double-wall corrugated board can be advantageously used as transport and storage material in the application according to the invention.

[0040] The quality of corrugated board is controlled using various testing systems. The DIN 55468 standard was developed based on the standards of the German Corrugated Board Industry Association. For corrugated board solutions to comply with standards, they must meet certain values, including burst strength, puncture resistance, and edge crush resistance.

[0041] In the transport and storage system according to the invention, corrugated cardboard is used, whereby the corrugated cardboard is inserted perpendicular to the outer web, inner web, or intermediate web, and preferably so that the flute also runs transversely. In technical jargon, this is referred to as vertical corrugated cardboard. This is unusual in that corrugated cardboard is typically inserted so that the load rests on the inner or outer web.

[0042] Furthermore, the invention provides for combining the corrugated board into stacks of corrugated board, thus forming a composite or stack with at least two walls. However, a composite or stack with three walls, in particular with more than ten walls, and more preferably with more than twenty walls, can also be used. Surprisingly, however, it has been shown that a single- or double-wall corrugated board composite can already exhibit sufficiently high stability with a comparatively low dead weight.

[0043] According to the invention, the corrugated cardboard is also glued with adhesives that are not susceptible to fungal attack and, in particular, glued with adhesives that do not provide a breeding ground for conventional fungi or other microbes, such as glues, especially white glues, spray adhesives or hot melt glues.

[0044] In addition, the paper used to make the corrugated board can also be treated with antifungal properties. Furthermore, an adhesive that does not dissolve under the influence of moisture is preferably used. A 24-hour water bath test can be conducted for this purpose. In particular, the corrugated board is glued or bonded to ensure water resistance.

[0045] In particular, the paper itself can be moisture-resistant and, in particular, feature a moisture-resistant binding. This may also be unnecessary if a high-quality kraft liner is used.

[0046] A transport and storage system according to the invention for metal coils for receiving, in particular, horizontal, cylindrical metal sheet bundles is of modular construction and has at least one base module and at least one insert module adapted to the area of ​​use and fitted therein, each of which is formed from a stack of corrugated cardboard.

[0047] According to the invention, the base module has a U-shaped cross-section, with a bottom wall and two orthogonally extending side walls. This design can be a single piece, so that the corners between the bottom wall and side wall are rounded due to the curvature of the corrugated cardboard layers.

[0048] The base module can have a length orthogonal to the cross-section that corresponds to the length of a coil to be accommodated or is shorter or longer.

[0049] If the base module is shorter, several base modules can accommodate the coil, which can make handling easier in certain cases.

[0050] In this case it is also possible for the base module to have the basic dimensions of a standard pallet, i.e. a size of 800x1200 mm. This means that the base module can also be permanently arranged on a standard pallet and lifted and moved with it. This is particularly advantageous for transport by lorry, as a coil packaged in this way can be easily and efficiently loaded onto and unloaded from the respective means of transport using a standard pallet. Advantageously, however, the standard pallet can also be omitted and the base module can serve as the base pallet, which can be transported or loaded and unloaded directly using a forklift truck, for example. To accommodate a coil from all sides, the arrangement comprising a base module and at least one insert module can be arranged in reverse from above on the coil, with the base modules supporting one another with the end faces of their side walls or being spaced apart.

[0051] The insert module can have a triangular cross-section with a flat mounting surface. In this case, two insert modules are used per base module.

[0052] However, it is also possible to use only a single insert module which has an area which is cut out in an inverted triangular cross-section, forming two receiving surfaces, with the mouth of the triangular cutout pointing upwards and being wider than a coil diameter.

[0053] When using two insert modules, they are designed as triangular cross-sections, specifically as regular right-angled triangles with the contact surfaces forming a right angle between them. If the corners of the base module 8 are rounded, this must of course also apply to the angle between the contact surfaces.

[0054] In the case of two insert modules, these are arranged opposite one another, with one leg resting with its contact surface on a bottom wall of the base module and a vertical leg resting with its contact surface on a side wall of the base module.

[0055] In a further embodiment, only one insert module is present, wherein the at least one insert module has at least one support surface which is convex and in particular designed as a cylinder jacket segment. This makes this design ideally suited to a coil shape. Alternatively, an elliptical shape of the support surface can be provided, which approximately approaches a cylinder jacket segment, which is adapted to the respective outer diameter of the coil by means of fitting pieces such as rubber mats. This makes this design ideally suited to a coil shape and yet allows flexibility to be accommodated in different coil outer diameters. In both variants, a circular or elliptical cutout, in particular with a cutout corresponding to the radius of the coil to be accommodated, is cut out of, for example, a single cuboid block of corrugated cardboard.When using an elliptical cutout, this can advantageously deviate from the outer radius of the coil by a maximum of 100 mm, in particular by a maximum of 50 mm.

[0056] Such a monolithic block is particularly suitable for storing coils in a particularly gentle manner between processing steps or before transport in the steelworks or before further processing at the customer's site.

[0057] This block can be designed for transport by train or truck, allowing the coil to be efficiently loaded and unloaded onto the block. Additionally, it can be designed for storage at the steel mill or at the customer's site.

[0058] Such a monolithic block can also be used for container transport and then has, for example, a width corresponding to the width of the container, a height corresponding to the desired height of the area of ​​the coil that is accommodated by the partially cylindrical opening in the block, in addition to a thickness that should exist between the bottom of the base module and the coil.

[0059] If multiple coils are stored in a container, corrugated cardboard spacers can also be arranged along the container end walls, i.e., the rear wall, extending across the entire or partial width of the container. Such elements can, of course, also be arranged between the coils, and thus also longitudinally between the first, second, third, and fourth modules. This also secures the coils longitudinally within the container.

[0060] The resulting recess opens upwards. The depth of the cutout is dimensioned such that a coil can be accommodated in the cutout up to at least a quarter, in particular a third, and in particular more than a third, up to half its diameter, or more than half its diameter.

[0061] In addition, it is also possible that a monolithic corrugated cardboard block does not extend over the entire width of the container and, in this respect, the second modules described above are used to adjust the distance to the wall.

[0062] To improve handling, the corrugated cardboard blocks can also be arranged in sections along the length of a coil, so that, for example, there are three corresponding first modules per side along the entire length of a coil, for a total of six modules facing each other. Fifth modules can be placed between these first modules, which space and secure them longitudinally.

[0063] Tests have shown that corrugated cardboard which is loaded in the manner described, namely on the front edges running transversely to the corrugation, develops such a high level of stability that it is not necessary to support the metal coil over its entire surface.

[0064] To further reduce weight, one embodiment can provide the modules with chamber-like, hollow sections. Such hollow sections are preferably punched-out areas located below the actual support surface. Multiple hollow sections can also be provided, forming a web-like or truss-like supporting structure between them. This can further improve handling. In particular, the weight is reduced, thus taking occupational safety into account.

[0065] Since condensation often occurs in containers, it is advantageous for the corrugated cardboard to be made of paper that is, if possible, moisture-resistant. The same applies to the adhesive, which is preferably also waterproof. For further protection of the elements, a simple layer of silicone paper or similar moisture-resistant material can be provided between the support surfaces of the modules on the one hand and the coil on the other.

[0066] The invention is advantageous in that, surprisingly, corrugated cardboard, when loaded on its end faces contrary to its usual use, exhibits a surprisingly high level of stability, which is sufficient to be used for a transport and storage system. Another advantage is that a sustainable storage system is used, which can be used multiple times if necessary, but can also be easily recycled at the end of its useful life and can therefore be used endlessly. Even thermal recycling is possible, as it is a renewable raw material. The modular design, consisting of identical base modules and adapted insert modules for the respective coils, minimizes production costs and achieves greater variability.

[0067] The invention therefore relates in particular to a transport and storage system for metal coils for receiving, in particular horizontal, cylindrical metal sheet bundles, wherein at least one module is provided which is formed from a stack of corrugated cardboard, wherein the ceilings of the corrugated cardboard layers are oriented such that they run substantially perpendicular to a receiving surface of the module, wherein the transport and storage system has at least one base module and at least one insert module for insertion into the base module, wherein the insert module has contact surfaces for contact with the base module and receiving surfaces for receiving the metal coil.

[0068] A further development provides for the insert module to engage in the base module in a tongue and groove or plug-in manner.

[0069] A further development stipulates that the height of the intervention area corresponds to more than 10%, in particular more than 20%, of the height of the base module. This advantageously ensures particularly good connection and transmission of forces.

[0070] A further development provides that the height of the intervention area corresponds to less than 25%, in particular less than 20%, preferably less than 10% of the height of the base module. This advantageously allows for easy and safe assembly and disassembly for reuse of the modules without risking damage to the modules or the intervention area.

[0071] A further development stipulates that the width of the intervention area corresponds to between 20% and 60% of the width of the basic module.

[0072] A further development stipulates that the depth of the intervention area corresponds to between 20% and 60% of the depth of the basic module.

[0073] A further development provides for the base module to be made of a different grade of corrugated board, particularly a higher grade of corrugated board, than the insert module. This ensures an extended service life of the base module and allows it to be reused more frequently.

[0074] A further development provides that the insert modules are designed to extend over a total length of more than 30%, in particular more than 40%, particularly preferably more than 50% of the coil width.

[0075] A further development provides that the corrugated cardboard used to form the modules or the stacks of corrugated cardboard or the corrugated cardboard and the stacks formed from it are glued together in a waterproof manner.

[0076] A further development provides that the material for the covers of the corrugated cardboard is a kraftliner and / or the fluting webs are made of semi-cellulose or cellulose paper.

[0077] A further development provides that the ceilings and the corrugated layers are glued in a moisture-resistant and, in particular, waterproof manner.

[0078] A further development provides that the corrugated cardboard layers are combined to form corrugated cardboard stacks which are glued to one another over the surfaces via the covers, so that a composite or stack with at least two waves, in particular more than three waves, preferably more than ten waves and further preferably more than twenty waves is formed.

[0079] A further development stipulates that the paper material forming the corrugated board is moisture-resistant and / or fungicidal or bound.

[0080] A further development provides that the base module is U-shaped in cross-section with a bottom wall and two side walls extending orthogonally from it.

[0081] A further development provides that the base module has a length orthogonal to the cross-section that corresponds to the length of a coil to be picked up or is shorter or longer, or the base module has the basic dimensions of a standard pallet 800x1200 mm.

[0082] A further development provides that the base module has recesses on the underside in the floor wall for the intervention of forklifts or for a tongue and groove system for the stacking of the base modules with floor walls on top of each other.

[0083] A further development provides that, in order to accommodate a coil on all sides, the arrangement comprising a base module and at least one insert module is arranged in reverse from above on the coil, wherein the base modules are supported on one another with the end faces of their side walls or are spaced apart from one another by 1 mm to 100 mm, in particular 5 mm to 25 mm.

[0084] A further development provides that the base module has grooves and tongues on the end faces of the side walls in order to accommodate another, similarly designed base module in reverse with the end faces resting on top of each other.

[0085] A further development provides that the insert module has a triangular cross-section with a flat receiving surface or has a region that is cut out in an inverted triangular cross-section to form two receiving surfaces, wherein the mouth of the triangular cutout is directed upwards and is wider than a coil diameter. A further development provides that at least two insert modules are formed, which are triangular in cross-section and are, in particular, regular right-angled triangles in which the triangular legs form a right angle between them.

[0086] A further development provides that two insert modules are arranged opposite one another, with one leg resting with its contact surface on a bottom wall of the base module and a vertical leg resting with its contact surface on a side wall of the base module.

[0087] A further development provides that modules are arranged between the base module and a transport container wall to fill a gap between the base module and a transport container wall.

[0088] A further development provides that at least one insert module is present, wherein the at least one insert module has at least one support surface which is convexly or elliptically curved and is designed in particular as a cylinder jacket segment.

[0089] A further development provides that the insert module has a width that corresponds to the inner width between the side walls of the base module, so that the insert module can be positively received by the base module.

[0090] A further development provides that the size of the triangular insert modules or the radius of the convex contact surface is adapted to the diameter of a coil to be accommodated or the elliptical curvature of the contact surface deviates by a maximum of 100 mm, in particular by a maximum of 50 mm, from the outer radius of the coil.

[0091] A further development provides that at least one cylindrical body extends through the insert module or the insert module and the base module, directed from a receiving surface towards a contact surface.

[0092] A further development provides that the at least one cylindrical body is mounted in a bore with a positive fit or with a press fit. A further development provides that the bore extends radially outward relative to the radius of a coil to be accommodated or extends outward at an angle to the radial.

[0093] A further development provides that the cylindrical body is designed as a solid cylinder or a hollow cylinder.

[0094] A further development provides that the cylindrical body is made of metal, plastic or cardboard.

[0095] A further development provides that the cylindrical body extends continuously through the bore and closes positively with the respective surfaces of the insert module, or in the area of ​​the receiving surface the cylindrical body is set back by 1 mm to 100 mm, in particular 2 to 50 mm, preferably 2 to 20 mm with a cavity.

[0096] A further development provides that the cylindrical body contacts a bottom wall of a container or a supporting beam of an entire transport arrangement.

[0097] A further development provides that several bores and several cylindrical bodies arranged distributed around the circumference or along a receiving surface penetrate the insert module or the insert module and the base module.

[0098] The invention is explained by way of example with reference to a drawing. It shows:

[0099] Figure 1: the basic structure of a double-wall corrugated board;

[0100] Figure 2: a shaft with dimensions;

[0101] Figure 3: a single-wall corrugated board;

[0102] Figure 4: a double-wall corrugated board; Figure 5: a triple-wall corrugated board;

[0103] Figure 6: a first embodiment of the transport and storage system;

[0104] Figure 7: a second embodiment of the transport and storage system;

[0105] Figure 8: an isometric view of an embodiment of the transport and storage system;

[0106] Figure 9: a front view or sectional view of an embodiment of the transport and storage system;

[0107] Figure 10: a side view of an embodiment of the transport and storage system;

[0108] Figure 11: another embodiment of the transport and storage system.

[0109] Figure 1 shows the basic structure of a double-wall corrugated board. A first flute web 2 extends from an inner liner 1, which is a flat paper layer. Its flute tips 3 rest on the inner liner 1 and are glued to it.

[0110] On this corrugated sheet 2, an intermediate layer 4 rests, which is also a flat paper surface. On this intermediate layer 4, another corrugated sheet 5 rests, the height of which is lower and the distance (t) between the corrugation tips 3 is also smaller. An outer layer 6, which is also a flat paper sheet, is glued onto this corrugated sheet 5, resting on the corrugation tips 3.

[0111] The papers used for this are well-known thick and tear-resistant papers, especially so-called kraftliner paper, at least on the outer sides, for additional stability and moisture protection. The individual panels, such as the inner panel 1, the intermediate panel 4, and the outer panel 6, are waterproof-bonded to the corrugated panels 2 and 5.

[0112] According to the invention, it has been found that pure cornstarch adhesives are unsuitable for the inventive application of corrugated cardboard, as they cannot withstand the climatic conditions, especially humidity, and can also be a breeding ground for fungi. Adding resin to the cornstarch adhesive can significantly increase its resistance to moisture and fungal attack.

[0113] Figure 2 shows a wave path viewed from the front, showing the wave pitch (t) and wave height (h). The distance between two ulnar peaks is the wave pitch (t), and the distance between one wave trough and the next wave peak is the wave height (h).

[0114] In principle, single-, double- or multi-wall corrugated cardboard can be used, since according to the invention stacks are made up of several layers of corrugated cardboard that are glued together over the entire surface.

[0115] Typical flute combinations for double-walled boards according to the standard are BC flute, EB flute, or EE flute. For triple-walled corrugated boards, ACA, BAA, EBC, or BBC flute combinations are common. However, depending on requirements, any desired combination of the well-known flute types K flute, A flute, C flute, B flute, D flute, E flute, F flute, G flute, and N flute is possible.

[0116] Kraftliner is used as the cover material. Semi-cellulose or cellulose paper is used for the flute, although combinations are possible.

[0117] Depending on climatic conditions, these papers can also be moisture-resistant or biocidal or fungicidal. In particular, they can be fungicidal. Figures 3, 4, and 5 show the basic single-wall, double-wall, and triple-wall constructions.

[0118] According to the invention, block-like modules are formed from stacks of corrugated cardboard. Combinations of triple-wall, double-wall, and single-wall corrugated cardboard are thus possible and desirable, and in particular, the exact width of the individual modules can be determined. The corresponding single-, double-, or triple-wall boards are placed on top of each other with their respective tops and glued together, so that, if necessary, in addition to the usual corrugated cardboard bonding in single-, double-, or triple-wall construction, additional corrugated boards can be glued together over the entire surface.

[0119] The adhesives used for corrugated board production can also be used here, and in particular, adhesives that are climate-, moisture-, and heat-resistant can be used. Mixtures of corn starch, glue with synthetic resins, and starch adhesives can be used to bond the individual sheets together.

[0120] Figure 6 shows a first embodiment of the transport and storage system 7.

[0121] A transport and storage system according to the invention for metal coils for receiving, in particular, horizontal, cylindrical metal sheet bundles has at least one base module 8 and an insert module 9 fitted therein, each of which is formed from a stack of corrugated cardboard, wherein the covers 1, 4, 6 of the corrugated cardboard layers are oriented such that they run substantially perpendicular to a receiving surface 11 of the module 9 or parallel to the direction of force.

[0122] The insert module 9 has contact surfaces 10 for contact with the base module 8 and a receiving surface 11 for receiving the metal coil. The insert module can also have one or more engagement areas 35, as shown in the figure, which are suitable for connecting and inserting into the base module 8. This can ensure increased stability of the module assembly and optimal force transmission of the coil weight. The corrugated cardboard used to form the modules 8, 9 or the stacks of corrugated cardboard or the corrugated cardboard and the stacks formed therefrom are preferably bonded together in a waterproof manner.

[0123] The material for the covers 1, 4, 6 of the corrugated cardboard is a kraftliner and / or the corrugated webs 2, 5 are made of semi-cellulose or cellulose paper.

[0124] The ceilings 1, 4, 6 and the corrugated layers are preferably moisture-resistant and, in particular, waterproof glued.

[0125] According to the invention, the base module 8 is U-shaped in cross section with a bottom wall 15 and two side walls 16 extending orthogonally therefrom. This design can be one-piece, so that due to the bending of the corrugated cardboard layers, the corners between the bottom wall 15 and the side wall 16 are rounded.

[0126] The base module 8 can have a length orthogonal to the cross-section that corresponds to the length of a coil to be accommodated or is shorter or longer.

[0127] This allows a coil to be completely accommodated and the front edges of the coil can be protected, in particular if the base module 8 protrudes beyond the coil.

[0128] If the base module is shorter, several base modules can accommodate the coil, which can make handling easier in certain cases.

[0129] In this case, it is also possible for the base module 8 to have the basic dimensions of a standard pallet of 800x1200 mm. This allows the base module to be permanently mounted on a standard pallet and lifted and moved with it. This can facilitate loading and unloading, for example, onto transport vehicles such as trucks and / or trains.

[0130] The base module 8 can also have recesses on the underside of the floor wall 15, as shown in Figures 6 to 10, for the insertion of forklift forks. This allows it to be used as a transport or storage system even without a standard pallet.

[0131] In addition, these recesses can be part of a tongue and groove system for stacking base modules 8 with base walls 15 on top of each other.

[0132] In order to accommodate a coil on all sides, the arrangement of a base module 8 and at least one insert module 9 can be arranged inverted from above on the coil (Figure 6), wherein the base modules 8 are supported on one another with end faces 20 of their side walls or are spaced apart.

[0133] It is clear that several such arrangements can also be stacked on top of each other. The aforementioned tongue and groove system can be used here, which prevents lateral slippage. Alternatively, multi-layer stacking can be done with the modules centered on each other, thus forming a two- or three-layer stack.

[0134] In addition, the base module 8 can have grooves and tongues on the end faces 20 of the side walls 16 to accommodate another, similarly designed base module 8 in reverse with the end faces 20 resting on top of each other. This also prevents lateral slippage when the end walls 20 are placed on top of each other and ensures a good form fit.

[0135] As shown in Figure 6, the insert module 9 can be triangular in cross-section with a flat receiving surface 11. In this case, two insert modules 9 are used per base module 8, as shown in Figure 6.

[0136] However, it is also possible to use only a single insert module 9, which has an area cut out in an inverted triangular cross-section, forming two receiving surfaces (11), wherein the mouth of the triangular cutout faces upwards and is wider than a coil diameter. When using two insert modules 9, the cross-sections are designed as triangles, and in particular as regular right-angled triangles, in which the contact surfaces 10 define a right angle between them. In the event that the corners of the base module 8 are rounded, this must of course also apply to the angle between the contact surfaces 10.

[0137] As shown in Figure 6, two insert modules 9 are arranged opposite each other, wherein one leg 17 rests with its contact surface 10 on a bottom wall 15 of the base module 8 and a vertical leg 18 rests with its contact surface 10 on a side wall 16 of the base module 8.

[0138] To fill a gap between the base module 8 and a transport container wall, additional modules (not shown) can be arranged between the base module 8 and a transport container wall. This is helpful, for example, if the base module is adapted to the width of a transport wagon or truck trailer and a sea container is narrower, or vice versa.

[0139] In a further embodiment, at least one insert module 9 is provided (Figure 7), wherein the at least one insert module 9 has at least one support surface 11 that is convex and, in particular, designed as a cylindrical shell segment. This design is therefore ideally adapted to a coil shape. However, the support surface 11 can also be elliptical and only approximately correspond to the coil shape.

[0140] The insert module 9 has a width which corresponds to the inner width between the side walls 16 of the base module 8, so that the insert module 9 can be positively received by the base module 8.

[0141] In principle, it is sensible that the size of the triangular insert modules 9 or the radius of the convex contact surface 11 is matched to the diameter of a coil to be accommodated. The modular design with a base module 8 and an insert module 9 is ideal for this, as the base modules are always the same and only the insert modules can be adapted. Figure 8 shows the base modules 8 and insert modules 9 according to Figure 6 in an isometric view. Only the lower part is shown, as this can in principle also be used without a cover. Figure 8 shows a connecting element 34 which connects the insert modules 9 to the base module 8. This connecting element 34 rests on contact surfaces 37 of the base module 8 on both sides.

[0142] Figure 9 shows a front view or sectional view of an embodiment. The engagement regions 35 extend through the base module 8 and form the contact surface 37 outside the base module 8. The connecting element 34 rests on this contact surface 37. Figure 10 shows a side view of this embodiment. Of course, it is also possible for the engagement regions 35 not to extend through the base module, but for separate contact surfaces 37 to be formed on the outside of the base module. Figure 10 shows the binding strap 36 with which the coil is wrapped. It is also possible for the binding strap to encompass the entire transport or storage device and hold it securely so that it can be transported as a whole.

[0143] Another embodiment shows the use of complementarily shaped base modules, one as a base element, and the other with the complementary shape of the base module for attaching to the coil (Figure 11). This ensures safe transport and storage. Additionally, the transport device or just the coil can be wrapped with a conventional binding tape 36.

[0144] In order to make the insert modules more stable and / or to connect them more permanently to the base modules 8, at least one cylindrical body 12 (not shown) can pass through the insert module 9 or the insert module 9 and the base module 10, directed from a receiving surface 11 away from a contact surface 10.

[0145] The at least one cylindrical body 12 can be mounted in a bore 13 with a positive fit or with a press fit, wherein the bore 13 extends radially outward relative to the radius of a coil to be accommodated or extends outward at an angle to the radial. The cylindrical body 12 can be solidly cylindrical or hollow cylindrical and made of metal, plastic, or cardboard. The cardboard construction ensures the unity of the material.

[0146] The cylindrical body 12 can extend continuously through the bore 13 and form a positive fit with the respective surfaces of the insert module 9, or can be set back slightly in the area of ​​the receiving surface 11 with a cavity 14 spaced from the receiving surface 11. In this case, it can contact a bottom wall of a transport container, a hall floor, or a supporting beam of an entire transport arrangement.

[0147] Of course, several bores 13 and several cylindrical bodies 12 arranged distributed around the circumference or along a receiving surface 11 can also pass through the insert module 9 or the insert module 9 and the base module 10.

[0148] In particular, when the body 31 is made of cardboard or as a cardboard sleeve, the advantage is that the transport concept is made of a single and also recyclable material.

[0149] Additionally, it can be advantageous and increase stability if a connecting element 34 extends around the base module and the insert modules. This connecting element 34 can be made of wood, corrugated cardboard, or other materials. Preferably, the connecting element 34 is made of the same recyclable material as the base module 8. For improved connection of such an element, contact surfaces 37 can be provided on the outer walls of the base module 8 to allow the connecting element 34 to rest on the contact surfaces 37 and to make assembly and disassembly as simple as possible.

[0150] Of course, the engagement areas can also be adapted so that they extend from the base module and engage with the insert module. Alternatively or additionally, several engagement areas can of course be provided per module. The binding tape can only wrap around the respective coil or run around the base module or insert modules and the coil. In particular, running around the connecting element, it can enable safe and efficient transport of a coil packaged in this way with the base module. To achieve even greater protection against the effects of moisture in more extreme climatic conditions, particularly in tropical regions, the end surfaces of the corrugated cardboard, which are open due to the corresponding cuts, can also be covered with kraft liner paper or, in extreme cases, with silicone paper or similar water-repellent layers.The advantage of the invention is that sustainable transport and storage systems are made from a sustainable raw material, which have a high load-bearing capacity and protect the stored goods.

Claims

Claims 1. Transport and storage system for metal coils for receiving, in particular horizontal, cylindrical bundles of metal sheet, wherein at least one module (8, 9) is provided which is formed from a stack of corrugated cardboard, wherein the covers (1, 4, 6) of the corrugated cardboard layers are oriented such that they run substantially perpendicular to a receiving surface (11) of the module (8, 9), characterized in that the transport and storage system has at least one base module (8) and at least one insert module (9) for insertion into the base module (8), wherein the insert module (9) has contact surfaces (10) for contact with the base module (8) and receiving surfaces (11) for receiving the metal coil.

2. Transport and storage system according to claim 1, characterized in that the insert module (9) engages in the base module (8) in a tongue and groove manner or in a plug-in manner.

3. Transport and storage system according to claim 2, characterized in that the height of the engagement area (35) corresponds to more than 10%, in particular more than 20%, of the height of the base module (8).

4. Transport and storage system according to claim 2, characterized in that the height of the engagement area (35) corresponds to less than 25%, in particular less than 20%, preferably less than 10% of the height of the base module (8).

5. Transport and storage system according to claim 2 or claim 3 or claim 4, characterized in that the width of the engagement area (35) corresponds to between 20% and 60% of the width of the base module (8).

6. Transport and storage system according to one of the preceding claims, characterized in that the base module (8) consists of a different corrugated cardboard quality, in particular higher corrugated cardboard quality, than the insert module (9).

7. Transport and storage system according to one of the preceding claims, characterized in that the insert modules (9) are designed to extend in total over a length of greater than 30%, in particular greater than 40%, particularly preferably greater than 50% of the coil width.

8. Transport and storage system according to one of the preceding claims, characterized in that the corrugated cardboard for forming the modules (8, 9) or the stacks of corrugated cardboard or the corrugated cardboard and the stacks formed therefrom are glued together in a water-resistant manner.

9. Transport and storage system according to one of the preceding claims, characterized in that the material for the covers (1, 4, 6) of the corrugated cardboard is a kraft liner and / or the corrugated webs (2, 5) are made of semi-cellulose or cellulose paper.

10. Transport and storage system according to one of the preceding claims, characterized in that the covers (1, 4, 6) and the corrugated layers are glued in a moisture-resistant and in particular waterproof manner.

11. Transport and storage system according to one of the preceding claims, characterized in that the corrugated cardboard layers are combined to form corrugated cardboard stacks which are glued to one another over the surface via the covers (1, 3, 6), so that an at least two-wave, in particular more than three-wave, preferably more than ten-wave and further preferably more than twenty-wave composite or stack is formed.

12. Transport and storage system according to one of the preceding claims, characterized in that the paper material forming the corrugated cardboard is treated or bound to be moisture-resistant and / or fungicidal.

13. Transport and storage system according to one of the preceding claims, characterized in that the base module (8) is U-shaped in cross section with a bottom wall (15) and two side walls (16) extending orthogonally therefrom.

14. Transport and storage system according to one of the preceding claims, characterized in that the base module (8) has a length orthogonal to the cross-section which corresponds to the length of a coil to be accommodated or is shorter or longer, or the base module (8) has the basic dimensions of a standard pallet 800x1200 mm.

15. Transport and storage system according to one of the preceding claims, characterized in that the base module (8) has recesses in the bottom wall (15) on the underside for the engagement of forklift trucks or for a tongue and groove system for stacking the base modules (8) with bottom walls on top of each other.

16. Transport and storage system according to one of the preceding claims, characterized in that for receiving a coil on all sides, the arrangement comprising a base module (8) and at least one insert module (9) is arranged inverted from above on the coil, wherein the base modules (8) are supported on one another with end faces (20) of their side walls or are spaced apart from one another by 1 mm to 100 mm, in particular 5 mm to 25 mm.

17. Transport and storage system according to one of the preceding claims, characterized in that the base module (8) has grooves and tongues on the end faces (20) of the side walls in order to receive a further, identically designed base module (8) in reverse with the end faces (20) resting on one another.

18. Transport and storage system according to one of the preceding claims, characterized in that the insert module (9) is triangular in cross section with a flat receiving surface (11) or has a region which is cut out in an inverted triangular cross section forming two receiving surfaces (11), wherein the mouth of the triangular cutout is directed upwards and is wider than a coil diameter.

19. Transport and storage system according to one of the preceding claims, characterized in that at least two insert modules (9) are designed which are designed as triangles in cross section and are in particular regular right-angled triangles in which the triangle legs define a right angle between them.

20. Transport and storage system according to one of the preceding claims, characterized in that two insert modules (9) are arranged opposite one another, wherein one leg (17) rests with its contact surface (10) on a bottom wall (15) of the base module (8) and a vertical leg (18) rests with its contact surface (10) on a side wall (16) of the base module (8).

21. Transport and storage system according to one of the preceding claims, characterized in that modules are arranged between the base module and a transport container wall to fill a gap between the base module (8) and a transport container wall.

22. Transport and storage system according to one of the preceding claims, characterized in that at least one insert module (9) is present, wherein the at least one insert module (9) has at least one support surface (11) which is convexly or elliptically curved and is designed in particular as a cylinder jacket segment.

23. Transport and storage system according to one of the preceding claims, characterized in that the insert module (9) has a width which corresponds to the inner width between the side walls (16) of the base module (8), so that the insert module (9) can be received in a form-fitting manner by the base module (8).

24. Transport and storage system according to one of the preceding claims, characterized in that the size of the triangular insert modules (9) or the radius of the convex contact surface (11) is adapted to the diameter of a coil to be accommodated or the elliptical curvature of the contact surface (11) deviates by a maximum of 100 mm, in particular a maximum of 50 mm, from the outer radius of the coil.

25. Transport and storage system according to one of the preceding claims, characterized in that at least one cylindrical body (12) extends through the insert module (9) or the insert module (9) and the base module (10) directed from a receiving surface (11) away from a contact surface.

26. Transport and storage system according to one of the preceding claims, characterized in that the at least one cylindrical body (12) is mounted in a bore (13) in a form-fitting or press-fitting manner.

27. Transport and storage system according to one of the preceding claims, characterized in that the bore (13) extends radially outwards with respect to the radius of a coil to be received or extends outwards at an angle to the radial.

28. Transport and storage system according to one of the preceding claims, characterized in that the cylindrical body (12) is solidly cylindrical or hollow cylindrical.

29. Transport and storage system according to one of the preceding claims, characterized in that the cylindrical body (12) is made of metal, plastic or cardboard.

30. Transport and storage system according to one of the preceding claims, characterized in that the cylindrical body (12) passes through the bore (13) continuously and closes positively with the respective surfaces of the insert module (9), or in the region of the receiving surface (11) the cylindrical body (12) is set back by 1 mm to 100 mm, in particular 2 to 50 mm, preferably 2 to 20 mm with a hollow space (14) from the receiving surface (11).

31. Transport and storage system according to one of the preceding claims, characterized in that the cylindrical body (12) contacts a bottom wall of a container or a supporting beam of an entire transport arrangement.

32. Transport and storage system according to one of the preceding claims, characterized in that a plurality of bores (13) and a plurality of cylindrical bodies (12) distributed around the circumference or along a receiving surface (11) extend through the insert module (9) or the insert module (9) and the base module (10).

33. Use of a transport and storage system according to one of the preceding claims for rail, truck, or sea transport or for storing metal coils in a building.

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