Shelf, rack and shuttle storage system for anti-container movement

Abstract

A shelf (24) for a rack (14), the rack (14) and a shuttle storage system (10) with the rack (14) are disclosed, wherein the shelf (24) has a top surface (27) that defines a substantially planar storage area (28) on which a stored item (12) can be positioned for storage, wherein the shelf (24) has at least one interference contour (34) that projects beyond the storage area (28), and wherein each of the interference contours (34) defines a cutting edge (36) that is configured to cut into a bottom surface (40) of a stored item (12) such that the stored item (12) is blocked transversely to a depth direction (Z) of the rack (14).

Description

The present disclosure relates to a shelf, a rack with such a shelf and an (intralogistics) shuttle storage system with at least one such rack, wherein the shelf(s) are configured to inhibit and ideally prevent so-called container migration by minimally cutting into the undersides of the stored goods in order to create a blocking positive fit between the rack and the stored goods in a transverse direction to a depth direction of the rack. Racking systems in intralogistics applications, such as shelving for storing containers or pallet racking (high-bay racking), are widely known. Shuttle racking, in particular, is a modern, highly dynamic intralogistics racking system specifically designed for the efficient storage and order-specific transport of goods within a warehouse and order picking system. This system combines racking with an automated shuttle system. Shuttles automatically store and retrieve goods from the racking compartments. These shuttles are storage and retrieval machines, specifically single-level storage and retrieval machines, which (preferably on each racking level) travel along the long sides of the racking on rails attached to the racking, defining a racking aisle between them. This allows for single- or multi-deep storage and retrieval of goods perpendicular to the aisle, i.e., in the depth direction of the racking.Each shuttle is an autonomous, and in particular electrically powered, vehicle that travels on the rails within a given shelf level. The phenomenon of "container wandering" in a shuttle racking system refers to the unintentional movement or shifting of storage containers within the racking system during storage. This can result in containers no longer being in their intended or predetermined positions, caused by various factors such as impacts (unintentionally) transmitted into the racking by passing shuttles; smooth container bottoms or shelf surfaces that offer little friction, allowing the containers to slide more easily; or uneven container loading. Possible consequences of container wandering include: positioning problems because the shuttle cannot grip or place the container correctly; blockages because displaced containers obstruct pathways; damage due to collisions; and efficiency losses caused by time delays resulting from (manual) corrections. Common measures to prevent container movement include: the use of anti-slip or friction-enhancing materials (e.g., rubber); precise dimensioning of storage spaces in relation to the containers to minimize play; the use of locking systems (e.g., mechanical stoppers, guide rails, or clips); smoother shuttle movements; and / or real-time monitoring of container positions for automated adjustment in case of deviations. Side and rear edges for delimiting storage spaces are disclosed, for example, in EP 3 418 222 B1. The top surface of shelves can be specially designed or modified to prevent unwanted movement of storage containers. A rubberized shelf surface provides additional grip for stored items. Special coatings with a rough texture can be applied to the shelves to increase adhesion. Self-adhesive anti-slip films are easy to apply to the shelves and increase friction. Surfaces with embossed grooves or a grid-like profile prevent stored items from easily sliding. Shelves with raised side or back edges prevent stored items from sliding off sideways (see EP 3 418 222 B1 above). Shelves with integrated recesses or indentations hold round or delicate items securely in place. Recessed bars or strips in the surface act as barriers.Other shelving systems offer optional strips or dividers that can be inserted directly into the shelf. Shelves with integrated locking or clip systems allow for the securing of items or containers. Shelves made of magnetic material or with a magnetic coating allow for the securing of metallic objects. Items with hook-and-loop fasteners can be securely attached to suitable shelves. Shelves made of rough materials such as corrugated aluminum, wood with a rough surface, or coarse plastic prevent items from sliding. Furthermore, measures have already been proposed to eliminate disruptive edges at gap-like joints, so-called buttresses, between adjacent rail sections of a shuttle track, see e.g. DE 10 2023 100 596 A1, so that the shuttle's rollers can travel smoothly over such gaps due to an effectively minimized gap width and no longer transmit impulses to the rack when crossing the gap. One conceptual measure to increase the positioning accuracy of stored goods is to regularly relocate the stored goods (e.g., depending on the weight of the goods and / or the storage time), so that inaccuracies caused by container movement are (cyclically) eliminated. It is a task of the present revelation to improve existing shelves in such a way as to prevent containers from moving. This problem is solved by a shelf for a rack, wherein the shelf has a top surface that defines a substantially planar storage area on which a stored item (in particular a carton) can be positioned for storage, wherein the shelf has at least one obstruction contour that projects minimally beyond the storage area (in particular upwards), and wherein each of the obstruction contours defines a (in particular linear) cutting edge that is configured to cut into an underside of a stored item, so that the stored item is blocked transversely to a depth direction of the rack. It was discovered that it is possible to make small incisions in the undersides of stored goods, even over extended periods, without seriously damaging them. The corresponding "knife edges" engage with the incisions, which are corresponding recesses in the undersides of the stored goods. This engagement creates a positive locking mechanism that prevents the stored goods from shifting laterally. For this purpose, mechanical elements with precise geometric properties are incorporated on the upper surface of the shelves, ensuring stability and securing the stored goods. This stability and securing is achieved perpendicular to the shelf depth. The risk of the stored goods being (unintentionally) shifted by external influences is minimized. Compatibility with the existing racking system is guaranteed. Preferably, each of the interference contours has a wedge-shaped cutting body, the pointed end of which terminates in the (in particular linear) cutting edge, which is designed to cut into the underside in such a way that, when the stored material is moved transversely to the depth direction, a positive locking mechanism is formed between a resulting incision in the underside and the cutting edge that has penetrated it, blocking in a blocking direction oriented transversely to the depth direction. The wedge-shaped cutting element optimizes the cutting edge for effective and reliable penetration into the stored material. The locking mechanism engages through targeted force transmission in the event of lateral movement of the stored material. The geometry of the cutting element and the specific locking mechanism enhance the locking effect and stability. A secure hold is ensured even when the stored material moves. The risk of damage is reduced by even force distribution. In particular, the cutting edges extend essentially parallel to the depth direction. The parallelism of the cutting edge to the depth direction ensures an even distribution of the blocking force and supports automated storage movements along the shelf depth. This results in a uniform mechanical load along the shelf depth. The shelf is compatible with automated storage processes. Preferably, each of the interfering contours protrudes from the bearing surface by a height of a few tenths of a millimeter up to one centimeter. Selecting the appropriate height of the interference contours allows for flexible use with different stored goods and prevents excessive damage. Stored goods do not wear out too quickly. Stored goods are affected minimally. In particular, each of the disturbance contours has an entry ramp and / or an exit ramp in the depth direction. The ramps prevent interfering contours from immediately and deeply cutting into the undersides of stored goods during regular storage and retrieval movements. Cutting only occurs when the goods are moved laterally. This simplifies storage and retrieval, especially in automated processes, and ensures optimized material handling during storage and retrieval. Preferably, each of the cutting edges has a length along the depth direction that is less than the depth of the soil. The length of the cutting edge is limited (along the depth direction). This avoids unnecessary stress on the stored goods while still ensuring precise blocking in the event of lateral movement. Production costs can be reduced due to the shorter cutting edge. In particular, the interference contours are chaotically distributed along the depth direction and / or a longitudinal direction of the shelf. The chaotic arrangement of the interference contours optimizes the distribution of loads and reduces systematic weak points. Preferably, each of the cutting edges has a wedge angle in a range of 10-30°. The cutting edges are sufficiently sharp to cut into the undersides of the stored goods. Such wedge angles ensure an optimal balance between cutting force and material stability. The cutting edge can penetrate the stored goods optimally without causing excessive damage. The desired blocking effect is achieved effectively due to the ideal wedge angle. In particular, each of the cutting edges is formed by a cutting line of first and second cutting flanks, wherein the first and second cutting flanks are oriented with different angles of attack of less than 90° to a vertical plane spanned by the depth direction and a height direction of the shelf. The varying angles of the cutting edges optimize penetration and reduce friction during the cutting process. Lower cutting forces are required. Reduced material stress increases the service life of the cutting edges. Preferably, the stored goods are pushed to the floor for storage and pulled down from the floor for retrieval along a depth direction (i.e. the storage / retrieval direction) of the rack (in particular automatically with a telescopic load handling device of a storage and retrieval machine). Integration into automated storage and conveyor systems is simplified. Efficiency in storage and retrieval is increased. Furthermore, the task is solved by a shelf which has a shelf compartment with a (particularly continuous) shelf of one of the types described above. Existing shelving systems can easily be expanded and / or retrofitted. Furthermore, the problem is solved by a shuttle storage system comprising: at least one rack of the type described above; and a storage and retrieval device, preferably one per rack level, which is connected to each of the racks for longitudinal guidance. It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of this disclosure. Exemplary embodiments of the present concept are shown in the drawings and are explained in more detail in the following description. The drawings show: Fig. 1 a perspective view of an aisle, laterally bounded by racks, of a partially depicted shuttle storage system, with goods stored on shelves; Fig. 2 a schematic sectional view of goods stored on a shelf; Fig. 3 a perspective view of part of a shelf having a congestion contour with an entry ramp and an exit ramp on its upper surface; Fig. 4 a diagram illustrating a cutting process; Fig. 5 a schematic sectional view of another congestion contour structure; Fig. 6 a schematic sectional view of yet another congestion contour structure; Fig. 7 a process for producing a congestion contour structure; and Fig. 8 a sectional view along line VIII-VIII in Fig. 7. Fig. 1 illustrates an interlogistics shuttle storage system 10 used for picking goods that are stored as storage items 12 in one or more racks 14. The storage and retrieval of the storage items 12 can be automated with one or more storage and retrieval machines, which are provided, for example, on each rack level in the form of shuttles 16 (in particular as single-level storage and retrieval machines) in an aisle 18 between two of the racks 14. The shuttles 16 can travel in the longitudinal direction X of the racks 14 on rails 20, which can be attached to the racks 14, in the aisle 18 in order to store and / or retrieve the stored goods 12 in a transverse direction Z of the racks 14 into one of the shelf compartments 22 of the racks 14 by pushing the stored goods 12 along a depth direction of the racks 14 (here the transverse direction Z of the system 10) onto (rack) shelves 24 (storage) and pulling them down from the shelves 24 (retrieval).Storage can be single-deep or multi-deep. Figure 1 shows an exemplary section of system 10. Figure 1 shows two racks 14-1 and 14-2, which define the aisle 18 between them in which the shuttles 16 travel, one of which is shown as an example in Figure 1. A stored item 14 is positioned on the shuttle 16, which the shuttle 16 may have previously retrieved from a storage location 26, which is therefore empty. The other storage locations 26 in Figure 1 are occupied. The stored items 14 are illustrated in Figure 1 as cartons, which in turn are filled with the actual goods (not illustrated), preferably of a single type. The stored items 14 could also be implemented by any other load carrier, such as a storage container or a tray (especially made of plastic). Figure 1 shows, in isolation, a rack level and some of the rack compartments 22, each of which can contain one or more of the storage locations 26.It is understood that further shelf levels may be present above and / or below those shown. Furthermore, it is understood that additional shelf compartments 22 may be present above, below, and beside those shown. Several aisles 18 (in the transverse direction Z and / or in the longitudinal direction X) may also be arranged side by side, which is not illustrated. The shelves 24 can be continuous (not illustrated) or interrupted, as indicated in Fig. 1. The upper surfaces 27 (see Fig. 2 and Fig. 3) of the shelves 24 essentially define planar storage areas 28 on which the stored goods 12 can be placed. During storage and retrieval, the stored goods 12 can be moved on the shelves 24 by sliding, e.g., using a telescopic load handling device 29, such as the shuttle 16. Essentially planar means that the storage areas 28 lie in a flat, two-dimensional plane (XZ plane), disregarding load-induced bulges and permanent deformations (dents) that represent unintended deviations into the third dimension. In Fig. 1, the shelves 24 are shown by way of example formed by crossbeams 30, which are arranged at an angle to each other in the longitudinal direction X, so that the stored goods 12 can be individually positioned on them, and which extend in the transverse direction Z between the horizontal longitudinal beams 32 of the racks 14 (horizontally). It is understood that the shelves 24 can also be implemented by, for example, grids or similar load-bearing structures. The shelves 24 are designed to support and store the stored goods 12 during storage. The degree of vertical permeability of the shelves 24 is of secondary importance. In general, each of the shelves 24 is provided on its upper surface 27 with at least one interference contour 34, which projects (minimally) from the upper surface 27 or storage area 28. The interference contours 34 project slightly upwards (vertically) above the storage area 28; depending on the (cutting) body angle, e.g., starting at 0.5 mm up to a maximum of 5 mm, preferably up to 3 mm. Each of the shelves 24 can be provided with a plurality of interference contours 34. A minimum stored item 12 should have contact with a minimum number of interference contours 34. This number may also depend on the type of stored item 12 (e.g., cardboard box, plastic container, etc.). Since one might be referring to interference contour lines, a possible measure could be the quotient of the total interference contour length below the stored item 12 to the support area of ​​the stored item s12, e.g., (10 x 50 mm) / (300 mm x 400 mm). However, this preferred value is likely dependent on the type of interference contour 34 and the stored item 12. As illustrated in Fig. 1, each of the crossbars 30 can have a plurality of interference contours 34. The interference contours 34 can be distributed chaotically, but preferably all in the same orientation, over the bearing surface 28. Preferably, the interference contours 34 are aligned parallel to the depth direction or the insertion / extraction direction Z, as will be explained in more detail below. A disturbance contour 34 is defined as an area of ​​the shelves 24 that deviates from a desired shape (plane) and can therefore act as an obstacle. The disturbance contours 34 thus describe areas that protrude into and can impair a designated movement space (storage / retrieval) or usage space (i.e., the storage space, which is bounded below by an essentially planar storage surface 28). The disturbance contours 34 protrude into a storage area of ​​the shelf compartments 22 or the shelves 14 and slightly (but intentionally) disrupt the actual storage function, as will be explained in more detail below. The disturbance contours 34 do not impede the smooth storage / retrieval of the stored goods 12. However, the disturbance contours 34 prevent or impede undesired lateral movements of the otherwise stationary, stored goods 12, particularly along the longitudinal direction X, which can be induced, for example, by passing shuttles 16. Fig. 2 shows a sectional view of a schematically represented item 12 stored on a shelf 24. The sectioned plane of Fig. 2 is oriented parallel to the XY plane of Fig. 1. The proportions shown are schematic for the sake of simplicity and do not correspond to reality. Each of the interference contours 34 comprises at least one (wedge-shaped) cutting element 36, which defines a (preferably linear) cutting edge 38. The cutting edge 38 is designed to cut into an underside 40 of a stored item 12, so that the stored item 12 is locked or blocked by a positive fit transversely to the depth direction Z, and in particular along the longitudinal direction X, of the shelf 14. In the example shown in Fig. 2, the interference contour 34 projects vertically from the otherwise planar storage surface 28. The (wedge-shaped) cutting element 36 of the interference contour 34 penetrates the storage surface 28 with its pointed end, which forms the (sharp) cutting edge 38. The cutting edge 38 preferably extends parallel to the storage / retrieval direction, i.e., to the depth direction Z of the rack 14. Preferably, each interference contour 34 projects from the storage surface 28 with a (vertical) height of a few tenths of a millimeter up to preferably 1 cm. Each interference contour 34 can have an entry ramp 42 and / or an exit ramp 44 in the depth direction Z, see Fig. 3, where one of the crossbeams 30 of Fig. 1 is shown schematically. Figure 2 shows an example of how the cutting body 36, with its cutting edge 38, has cut into the underside 40 of the stored item 12. The cutting edge 38 can cause a cut (notch or depression) 46 in the underside 40 while the stored item 12 is being pushed by the shuttle 16 in the positive Z-direction for storage on the shelf 24. However, this is not necessarily the case and can depend on several factors, which are discussed in more detail below. The following section discusses cutting processes in general. A cutting process generally describes a mechanical process in which the material of an object 48, cf. Fig. 4, is separated or locally altered by the application of forces F along a defined (movement) line, e.g., along the Z-direction of Fig. 4. This involves a targeted separation or deformation of the material structure, achieved by a (cutting) tool 50 or a sharp edge. Cutting is carried out by compressive, tensile, and / or shear forces F. Common cutting tools 50 include, for example, knives, scissors, saw blades, lasers, water jets, and other industrial cutting tools. Cutting is often a combination of mechanical deformation and material separation. It requires overcoming the material's strength (tensile strength, shear strength, compressive strength).The quality of a cut depends on factors such as a cutting force F, a sharpness of the cutting tool 50 and a quality of the materials involved (cutting tool 50 and object 48). The sharpness of a cutting tool 50, which is necessary to cut into the object 48, depends on various factors. For soft materials, such as cardboard, moderate sharpness is sufficient, as the strength and bonds between the material parts are low. For metals or plastics, the cutting edge 38 must be sharper to overcome the high strength and hardness of the material. Small cutting edge or wedge angles 52 of the (wedge-shaped) cutting body 36 (e.g., 10–15° for knife blades) increase sharpness and facilitate cutting. The cutting edge 38 should be as thin and precise as possible, as this minimizes the contact area and reduces the required force F. A sharp tool 50 concentrates the applied force F on a very small area, thereby generating high pressure (force per unit area) necessary to overcome the material's strength. The tool 50 must be harder than the object 48 to be cut. A measure of tool sharpness 50 describes how well the tool 50 can penetrate the material and is a combination of geometric, physical, and functional properties. There are several approaches to defining and measuring sharpness. Sharpness can be determined by the thickness of the cutting edge 38 (i.e., the cutting edge thickness) at its outermost tip (in cross-section). The thinner the cutting edge 38, the sharper the cutting edge 36. Very sharp razor blades, for example, have an (edge) thickness of < 1 µm. Smaller wedge angles 52 (e.g., 15°) produce sharper blades, while larger angles 52 (e.g., 30°) are more stable. The wedge angle 52 is the angle between the two flanks 54 of the cutting edge 38. The hardness of the cutting tool 50 can be measured on the Mohs or Rockwell scale. When a cut is made in the object 48, what happens to the object 48 depends on several factors, such as the material and shape of the object 48, the cutting force F, and the cutting tool 50. The object 48 can be divided at the cutting point, resulting in a complete separation of the object 48. The cutting changes the shape of the object 48 and produces two separate objects or an altered surface with the incision 46 (depression), see Fig. 2. When a cut is made into the surface of object 48, but the object 48 is not completely severed, local changes occur that depend on the material and the cutting technique (e.g., cutting angle 56). Material is removed along the cut line, creating a depression or groove. The surface becomes uneven. The material loses its original homogeneity, which can reduce its mechanical strength. However, since object 48 is not completely severed, its main structure remains intact. In summary, cutting the surface is an intervention that affects the external and local properties of object 48, while preserving the majority of its structure. A scratch and an incision 46 in a surface differ mainly in their depth, origin and effect on the material. Scratches are superficial damage that does not penetrate the entire thickness of the material's surface. Scratches affect only an outer layer or coating of the object. 48. Scratches are typically long, narrow indentations with an irregular surface. They are caused by the movement of a sharp or rough object across the surface. Scratches result from friction or abrasion when a pointed, rough, or sharp-edged object grazes the surface. Scratches occur unintentionally. Scratches generally only affect the appearance and not the mechanical properties of the material. Scratches can be removed by polishing, grinding, or surface treatments. Incisions 46, on the other hand, penetrate deeper into the material and extend beyond the mere surface. Cuts weaken the material partially or alter its structure. Incisions 46 have a clearly defined edge and a deeper, more precise structure. The cut edges are smooth when a sharp cutting tool 50 has been used. Incisions 46 are intentionally made by the sharp tool 50. Cuts of type 46 permanently alter the structure of the material and weaken it. Cuts of type 46 require more complex repairs, such as filling, welding, or replacing the affected part. Fig. 5 shows another possible structure of a top surface 27 of a (e.g., continuous) shelf 24 in a cross-sectional view perpendicular to the positive storage direction Z. The shelf 24 of Fig. 5 is horizontally oriented. The top surface 27 lies essentially in the XZ plane and defines the storage area 28. In Fig. 5, four cutting elements 34-1 to 34-4 are shown by way of example. It is understood that more or fewer cutting elements 34 can be provided along the cutting plane (and in the depth direction Z). The cutting edges 34-1 to 34-4 preferably extend parallel to the depth direction Z of the shelf 14. The cutting elements 34-1 to 34-4 can be inclined relative to the vertical (see dashed auxiliary lines 58). Cutting elements 34-1 and 34-2 are, for example, inclined to the left, and cutting elements 34-3 and 34-4 are, for example, inclined to the right. All cutting bodies 34 could be inclined in the same direction.Differently oriented inclinations of the cutting elements 34 are preferred because, in this case, for example, the cutting edges 38-1 and 38-2 become effective in the event of undesired lateral movements of the (not illustrated here) stored item 12 to the right, i.e., movements in the positive longitudinal direction X, and the cutting edges 38-3 and 38-4 become effective in the event of undesired lateral movements of the stored item 12 to the left, i.e., movements in the negative longitudinal direction X, by cutting into or penetrating the (not illustrated) underside 40, in particular until the stored item 12 rests fully on the top surface 27 due to a vertical movement, and thus cause a positive locking action in the X-direction between the interfering contours 34 and the stored item 12. The stored item 12 can then no longer move in the X-direction, cf. Fig. 2.The cutting forces required for this are essentially caused by the weight of the (actually stationary) stored item 12 in combination with the unwanted impulses acting from the outside. Each of the cutting edges 38-1 to 38-4 of Fig. 5 is formed by two cutting flanks 54-1 and 54-2, the bottom-facing (lower) cutting flank 54-1 and the material-facing (upper) cutting flank 54-2, which form an angle of attack α1 and α2, respectively, with the vertical 58. The difference in the angle of attack Δα corresponds to the respective wedge angle 52 when the interference contour 34 is formed solely by the cutting body 36, as illustrated by way of example in Fig. 5. However, the interference contour 34 can also include one or more further body sections 60, as illustrated by way of example in Fig. 6. Fig. 6 again shows a sectional view of a disturbance contour 34 perpendicular to the depth direction Z. The contour 34 in Fig. 6 has, by way of example, a multi-part body. The contour 34 has, by way of example, two wedge-shaped cutting bodies 36-1 and 36-2, which define the first and second cutting edges 38-1 and 38-2, which are preferably oriented differently, as well as a further body section 60. The body section 60 can be arranged centrally between the cutting bodies 36. The cutting body 36-1 is, by way of example, inclined to the left, whereas the cutting body 36-2 is, by way of example, inclined to the right. A top surface 62 of the body section 60 can be concave with respect to the horizontal (compare auxiliary line 64). The auxiliary line 64 illustrates the bottom surface 40 of the (not shown here) stored material 12 in a normal storage condition (without any lateral impulses having acted upon it). The upper cutting flanks 54-2 can seamlessly transition into the top surface 62.The concave shape of the upper surface 62 of the body section 60 or of the contour 34 supports a cutting effect of the contour 34 during a lateral movement of the (not illustrated) stored item 12. The interference contours 34 can be designed similarly to cutting inserts of machining centers. The bodies 36-1, 36-2, and 60 can be formed integrally with the shelf 24. Alternatively, the contour 34 can be subsequently applied to the top surface 27. The cutting elements 36 can be attached to the further body section 60 and, in particular, can have a higher degree of hardness than the further body section 60. Fig. 7 and Fig. 8 illustrate an exemplary process for the (industrial) production of a shelf 24 with interference contours 34 of the type described above or for producing the interference contours 34 in a surface. Fig. 7 shows a shelf 24, the upper surface 27 of which is machined with a tool 66 to produce the interference contours 34. A sectional view along line VIII-VIII is shown in Fig. 8. The tool 66 can be a cutting wheel 70 rotatably mounted about an axis 68, the cutting edge 72 of which penetrates the top surface 27 of the shelf 24 to form the cutting edge(s) 52 of the interference contours. The cutting wheel 70 is pressed into the shelf 24 with a force while it is moved across the surface along the negative Z-direction. It is understood that there are other methods for producing the cutting interference contours 34, which are known to the person skilled in the art and which are not described here. REFERENCE MARK LIST: 10 Shuttle storage system 12 Stored goods 14 Rack 16 Shuttle 18 Aisle 20 Rail 22 Shelf compartment 24 Shelf 26 Storage location 27 Top of 24 28 Storage area 29 Load handling device (LHD) of 16 30 Crossbeam of 14 32 Longitudinal beam of 14 34 Interference contour 36 Cutting body 38 Cutting edge 40 Bottom of 12 42 Entry ramp 44 Exit ramp 46 Notch 48 Object F Force 50 (Cutting) tool 52 Cutting edge or wedge angle 54 Cutting flank 56 Cutting angle 58 Vertical guide line 60 Body section 62 Top of 60 64 Guide line 66 Tool 68 Axis of rotation 70 Cutting wheel 72 Cutting edge of 66 QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature EP 3 418 222 B1 [0004, 0005] DE 10 2023 100 596 A1

[0006]

Claims

Shelf (24) for a rack (14), wherein the shelf (24) has a top surface (27) defining a substantially planar storage area (28) on which a stored item (12) can be positioned for storage, the shelf (24) has at least one interference contour (34) extending beyond the storage area (28), and each of the interference contours (34) defines a cutting edge (36) configured to cut into a bottom surface (40) of a stored item (12) such that the stored item (12) is blocked transversely to a depth direction (Z) of the rack (14). Shelf (24) according to claim 1, wherein each of the interference contours (34) has a wedge-shaped cutting element (36) whose pointed end terminates in the cutting edge (38) which is arranged to cut into the underside (40) in such a way that, when the stored goods (12) are moved transversely to the depth direction (Z), a positive locking action is formed in a blocking direction oriented transversely to the depth direction (Z) between a resulting incision (46) in the underside (40) and the cutting edge (38) that has penetrated it. Shelf (24) according to claim 1 or 2, wherein the cutting edges (38) extend substantially parallel to the depth direction (Z). Shelf (24) according to one of the preceding claims, wherein each of the interference contours (34) protrudes from the storage surface (28) by a height of a few tenths of millimeters up to one centimeter. Shelf (24) according to one of the preceding claims, wherein each of the interference contours (34) in the depth direction (Z) has an entry ramp (42) and / or an exit ramp (44). Shelf (24) according to one of the preceding claims, wherein each of the cutting edges (38) has a length along the depth direction (Z) which is less than a depth of the shelf (24). Shelf (24) according to one of the preceding claims, wherein the interference contours (34) are chaotically distributed along the depth direction (Z) and / or a longitudinal direction (X) of the shelf (14). Shelf (24) according to one of the preceding claims, wherein each of the cutting edges (38) has a wedge angle (52) in a range of 10-30°. Shelf (24) according to one of the preceding claims, wherein each of the cutting edges (38) is formed by a cutting line of first and second cutting flanks (54, 56), wherein the first and second cutting flanks (54, 56) are oriented with different angles of inclination (α) of less than 90° relative to a vertical plane (58) spanned by the depth direction (Z) and a height direction (Y) of the shelf (14). Shelf (24) according to one of the preceding claims, wherein the stored goods (12) are pushed along a depth direction (Z) of the shelf (14) for storage onto the shelf (24) and pulled down from the shelf (24) for removal. Shelf (14) comprising at least one shelf compartment (22) with a shelf (24) according to one of the preceding claims. Shuttle storage system (10) comprising: at least one shelf (14) according to claim 11; and a storage and retrieval device (16), preferably per shelf level, which is connected to each of the shelves (14) for longitudinal guidance.

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