Shelf for a storage lift

Abstract

Tray (1) for a storage lift, with a base (3) for storing goods, wherein the tray (1) is provided on at least one longitudinal side (11) with at least one flange (13, 15) bounding the base (3), and wherein the flange (13, 15) extends in a vertical section (57) connected to the base (3) substantially transversely to the base (3), wherein the flange (13, 15) has at least one reinforcing section (61) extending away from the vertical section (57), wherein the vertical section (57) and the at least one reinforcing section (61) enclose an obtuse angle (67) between them, characterized in that the flange (13, 15) has at least one tension section (69) at its distal end (71) to which at least one tension element of a storage lift can engage, and that the flange (13, 15) has at least one spacing section (63) exhibitswhich extends between the vertical section (57) and the at least one train section (69).

Description

[0001] Tray for a storage lift, with a floor for depositing stored goods, wherein the tray is provided on at least one longitudinal side with at least one edge bordering the floor, and wherein the edge runs substantially transversely to the floor in a vertical section connected to the floor.

[0002] Trays for storage lifts are well known. They are used to store goods in a storage lift and are usually accommodated in a movable manner. Trays must have sufficient load-bearing capacity for the goods to be accommodated. DE 92 02 414 U1 relates to a tray with ribbed edges on its long sides. The ribs extend into the storage area of ​​the tray. WO 2009 / 052 891 A1 relates to a storage rack with load management. It shows storage goods carriers provided with support webs. The support webs are arranged on the narrow sides of the carrier and each have two legs running parallel to each other. EP 0 634 334 A1 relates to a storage container with guide elements. The guide elements are formed as elongated projections on the long sides of the storage container. The projections have no profile. Gripping areas angled downwards are arranged on the short sides.US 2007 / 068427 A1 discloses a shelf frame with holders for round items. The holders have bevels on their long sides, which initially run at a right angle to the floor and then angle outwards. DE 83 26 738 U1 discloses a storage or transport box for shelving systems with automatic loading and unloading devices, which has a corrugated sheet metal base.

[0003] Trays usually have folded edges on at least one of their long sides. Folded edges are also called upstands or downstands. These folded edges can serve several purposes. Firstly, they can form a wall that defines the floor and limits the storage area. The vertical section in particular can serve as a wall that defines the floor. Furthermore, the folded edges can serve to stiffen the tray. Finally, folded edges can also be used to move a tray. For example, folded edges can be shaped so that transport, lifting, or pulling devices can interact with the trays. For example, a transport device can be brought into engagement with at least part of a folded edge in order to transport the tray. When a tray is loaded, the folded edges can absorb forces, thus preventing the tray from bending.The folded edge prevents the shelf from bending due to its area moment of inertia. Trays, especially their folded edges, are usually manufactured from sheet materials or metal sheets using bending processes.

[0004] It is the object of the invention to provide a tray of the aforementioned type, at least one edge of which can withstand even heavy loads on the tray caused by loading the tray base and which can be easily manufactured.

[0005] For a shelf of the type mentioned at the outset, this object is achieved in that the edge has at least one reinforcing section which extends away from the vertical section, wherein the vertical section and the at least one reinforcing section enclose an obtuse angle between them.

[0006] The at least one reinforcing section, which extends away from the vertical section to form an obtuse angle thereto, allows the area moment of inertia of the folded edge to be increased. This is achieved by increasing the height of the vertical section. However, the angle can simplify the production of the folded edge compared to a purely straight vertical section. In particular, the angle can prevent parts of the folded edge from colliding with bending tools. This applies in particular if the folded edge has further elements that adjoin the reinforcing section. The obtuse angle can create space for bending tools, such as punches, when forming the folded edge.

[0007] Overall, the inventive edging makes it possible to increase the stability of a tray without requiring new tools for bending. Instead, tools such as those used for forming edgings without the inventive reinforcing section can continue to be used. It should also be noted that the reinforcing section can increase the stability of the tray while maintaining the same material thickness of the starting material. The tray can therefore exhibit increased stability compared to a tray made from a starting material of the same thickness but without the inventive reinforcing section.

[0008] The obtuse angle refers to a cross-section through the folded edge perpendicular to the long side. The term "tray base" refers to a horizontal, preferably continuous, structure that defines the bottom of the tray's storage area. The stored goods rest, at least in part, on a floor surface accessible from above.

[0009] It is not excluded that there may be additional intermediate sections between the vertical section and the reinforcement section. However, these are preferably arranged directly adjacent to one another or merging into one another.

[0010] The solution according to the invention can be further improved by various, individually advantageous, and combinable embodiments. These embodiments and their associated advantages are discussed below.

[0011] The vertical section and the at least one reinforcement section can form an angle between 125° and 145°. This allows a good compromise between an increased area moment of inertia and simplified manufacturing. The angle is preferably 135° ± 3°.

[0012] In order to allow unobstructed access to the bottom of the shelf, the at least one reinforcement section, in particular with its end facing away from the vertical section, preferably extends away from the rest of the shelf

[0013] Furthermore, the edge has at least one tension section at its distal end, to which at least one tension element of a storage lift can engage. In cross-section transverse to the longitudinal side, the distal end is the end of the edge that is located away from the rest of the tray, in particular its base.

[0014] To create space for a transport means, such as a pulling device, for a finished tray, and to create space for a forming tool during tray production, at least one spacing section extends between the vertical section and the at least one pulling section. The spacing section can space the pulling section from the vertical section and simultaneously connect them. The at least one spacing section preferably extends from the reinforcing section to the pulling section.

[0015] Alternatively, the spacing section may be identical to the reinforcement section or may be an extension of the same.

[0016] Preferably, the at least one spacing section and the at least one reinforcing section form an angle of between 70° and 110° between them. In particular, the sections can form an angle of 90° ± 3° between them.

[0017] The at least one spacing section can form, with the at least one reinforcing section, a substantially roof-shaped, in particular gable-roof-shaped, cross-section, in particular transverse to the longitudinal side.

[0018] To prevent a pulling device from slipping when pulling the tray, the at least one pulling section preferably extends transversely to the floor. In particular, the at least one vertical pulling section can extend parallel to the vertical section.

[0019] The tray is preferably formed as a bent part. It can be manufactured, for example, as a stamped and bent part. However, processes other than stamping are also possible, in particular lasering. In the tray, at least two, preferably all, of the following elements can be formed monolithically with one another: base, vertical section, reinforcement section, spacing section, and tension section. However, this should not preclude the possibility of a multi-part tray structure.

[0020] As described above, the inventive edging ensures increased stability of the tray. This means that a tray according to the invention can withstand greater loads than a comparable tray without the inventive edging.

[0021] In order to also adapt the bottom of the tray to the higher load-bearing capacity imparted by the edging according to the invention, a further advantageous embodiment of the tray according to the invention is provided, in which the bottom of the tray is plastically deformed at at least one point spaced from at least one edge region.

[0022] This advantageous embodiment is discussed below. While this embodiment represents a preferred embodiment of the tray according to the invention, the edging according to the invention is also advantageous for trays without the tray base described in more detail below.

[0023] The at least one plastically deformed point of the base can lead to tension in the material of the base, in particular the sheet-like material. This tension can in turn produce an upward curvature of the base, wherein the upward curvature is related to a comparable tray without the at least one plastically deformed point. In other words, the base of the tray, which would sag downwards due to its own weight without the at least one plastically deformed point, can sag less due to the at least one plastically deformed point, or, instead of sagging downwards, can run horizontally or be curved upwards. The introduction of at least one plastically deformed point therefore leads to a negative prestress in the base, or to an upward curvature of the base, compared to a tray without the at least one plastically deformed point according to the invention.

[0024] This indirect formation of the bulge can presumably be caused by material of the base being displaced laterally at the at least one plastically deformed location, i.e., away from the at least one plastically deformed location. This displacement of material can lead to pressure, particularly laterally directed, in the base of the tray. Since the tray is usually limited at its sides and these sides can be stiffened, the base can react to the pressure generated by the plastic deformation by forming the bulge.

[0025] Due to the upward curvature of the base, the tray can be negatively pre-formed or negatively pre-stressed when unloaded, i.e. without stored goods. If the tray is then loaded and the load acting on the base increases, the base will curve downwards. Due to the negative upward deformation, the base will curve downwards less than would be the case with a comparable tray whose base does not have a plastically deformed area. In other words, when loaded by stored goods, the base must first overcome the upward curvature before it curves downwards under the weight of the stored goods. This can minimize downward curvature of the base. Compared to a tray without the plastically deformed area, the base of the tray according to the invention will therefore curve downwards less under the same load.This allows multiple trays to be stacked on top of each other in a storage lift with a small vertical gap. Since the downward curvature is reduced compared to a conventional tray, the tray can accommodate a higher load while maintaining the same space requirements.

[0026] The at least one plastically deformed location is to be distinguished from the deformation of the tray base described above, which is caused by the plastically deformed location. While the at least one plastically deformed location is limited locally in the tray base, in particular with regard to the surface area, the area of ​​negative prestress or upward curvature relates to larger areas of the base; depending on the design, this area can also make up the majority of the base. For the sake of brevity, the term "sheet metal" is used below for the term "sheet-like material". The tray, in particular the base, can be formed from a single sheet metal. Alternatively or additionally, the tray can also be formed from a plurality of sheets. Likewise, it is not excluded that a finished tray has further parts, so that it is composed of several individual parts.For example, the shelf can also be provided with attached corner supports.

[0027] At the at least one plastically deformed point, the curved base can have an upward offset. In other words, the curved base can be offset upwards at least in sections at the at least one plastically deformed point. The upward offset of the base can increase the tendency for the pre-forming or pre-stressing generated by the at least one plastically deformed point to be negative, or, in other words, for the curvature of the base to be oriented upwards. The offset is preferably locally limited by the at least one plastically deformed point. In other words, a curvature of the base generally extends over a larger proportion of the base area of ​​the tray than the offset.

[0028] As described above, the negative prestressing of the soil can be generated indirectly by introducing plastic deformation at at least one location in the soil. The at least one plastically deformed location preferably extends less across the soil surface than the area of ​​negative prestressing or curvature. It should also be noted that the area of ​​negative prestressing or curvature of the soil preferably extends over at least two-thirds of the soil surface, particularly preferably over the entire soil surface. The at least one plastically deformed location, in contrast, preferably extends over less than one-tenth of the soil surface.

[0029] Preferably, the tray, in particular its base, is substantially rectangular. The rectangular shape has narrow sides and longitudinal sides running perpendicular to these. The longitudinal sides run parallel to a longitudinal direction of the tray, and the narrow sides run parallel to a depth direction of the tray. Preferably, more material is displaced in the longitudinal direction of the tray than in the depth direction. This can increase the tendency to generate negative prestress or upward curvature.

[0030] To effectively generate a negative prestress in the soil, the at least one plastically deformed area can be formed by an elongated depression. The elongated depression can, for example, be a bead. In this case, the at least one elongated depression preferably forms an upward offset of the soil. The at least one elongated depression or the at least one bead can direct forces acting on the soil generated by the load to the at least one bead according to the invention.

[0031] According to a further advantageous embodiment, the base can be provided with a plurality of spaced-apart elongated recesses. The at least one elongated recess preferably extends parallel to the base in its longitudinal direction. Preferably, the at least one elongated recess runs transversely to at least one edge of the tray.

[0032] The tray can be substantially elongated, and a longitudinal direction of the at least one elongated recess can run substantially transversely to a longitudinal direction of the tray. As a result, more material is displaced in the longitudinal direction of the tray than transversely thereto, so that the at least one elongated recess can contribute to the curvature of the base.

[0033] As an alternative to being oriented transversely to the longitudinal direction of the tray, the at least one elongate recess can also have a different orientation. In particular, the at least one elongate recess can run diagonally, i.e. with a directional component transversely to the longitudinal direction of the tray and a directional component parallel to the longitudinal direction. It can also be possible for the tray to be provided with a plurality of elongate recesses which have different orientations. The tray preferably has a plurality of elongate recesses running parallel to one another. These can, in particular, run parallel to one another in groups, or in other words, form groups of recesses running parallel to one another.

[0034] According to a preferred embodiment, the at least one elongated recess extends continuously along its longitudinal axis. Alternatively, however, the at least one elongated recess can also be interrupted at at least one point. It is also possible to arrange a series of recesses, which do not necessarily have to be elongated, along a longitudinal axis.

[0035] The at least one elongated recess, preferably all elongated recesses if several are present, preferably have a length greater than 1 / 3, particularly preferably greater than 2 / 3, of the shelf depth. This can effectively cause the base to curve. The shelf depth refers to the depth of the shelf base, i.e., the usable surface.

[0036] If an offset is formed by the at least one plastically deformed point, this offset preferably has a height that corresponds at most to the thickness of the base. The thickness of the base refers in particular to the thickness of a sheet metal or the sheet-like material from which the base is formed. The height of the offset is determined in relation to the base area. The preferred maximum height of the offset preferably also applies in the case that the at least one plastically deformed point is formed by an elongated depression in the form of a bead. This bead height, which is comparatively low for typical beads, can be sufficient to increase the load-bearing capacity of the shelf, since the plastic deformation of the base caused by the beads is already sufficient to generate the negative prestress or the upward curvature of the base.The low height of the offset, especially of a bead, is advantageous in order to avoid unnecessarily restricting the volume of the storage area above the floor for stored goods. Furthermore, the low height of the offset is advantageous during tray production. Particularly when the at least one offset is introduced before the lateral edges of the tray are formed by folding, the low height of the offset prevents the sheet from becoming so distorted by the introduction of the offset that further processing becomes difficult.

[0037] Preferably, the at least one offset has a height that is at least 0.25 times and at most 1 times, more preferably at least 0.4 times and at most 0.7 times the thickness of the base. A good compromise that creates sufficient curvature of the base while simultaneously appearing to be unproblematic from a manufacturing perspective can be achieved by an offset height that corresponds approximately to 0.55 (± 0.05) times the thickness of the base. For a sheet thickness of 2 mm, this corresponds to an offset height of 1.1 ± 0.1 mm.

[0038] At least one of the elongated recesses, preferably all if several are present, can have a trapezoidal cross-section. The cross-section is viewed transversely to the longitudinal direction of the elongated recess. The trapezoidal cross-section can be formed like a trapezoidal sheet, i.e., isosceles, symmetrical, and with the short base of the trapezoid facing upwards, i.e., offset into the receiving area. Such a cross-section can be advantageous, on the one hand, for creating the curvature of the base. On the other hand, an elongated recess with such a cross-section, in particular a bead, can be easily manufactured. For manufacturing reasons, the trapezoidal cross-section described above can be rounded. This means that the transitions between the remaining base and the legs, and the transitions from the legs to the short base, then do not have sharp transitions, but rather merge into one another in a rounded manner.The legs and the short base side themselves may also deviate from the straight line and be rounded due to manufacturing reasons.

[0039] Alternatively, the at least one elongated recess can have a semicircular cross-section, with the convex side being curved or offset upwards into the receiving area. Other cross-sectional shapes are also possible, in particular those known for beads. A box-shaped and a triangular cross-section are mentioned here merely as examples. Furthermore, it is also possible that not all elongated recesses have the same cross-section.

[0040] According to an advantageous embodiment, the tray has a plurality of elongated recesses distributed equidistantly across the tray. The elongated recesses are preferably arranged with their longitudinal directions parallel to one another and at the same distance from one another transversely to the longitudinal directions. Furthermore, the elongated recesses are preferably aligned with one another. In other words, the ends of the elongated recesses relative to the longitudinal directions can each be arranged along a line running parallel to the longitudinal direction of the tray.

[0041] As an alternative to an equidistant arrangement of the elongated recesses, they can also have a different distribution. For example, the distances between two adjacent elongated recesses can decrease from the narrow sides of the tray toward the center of the tray. The distance between the two outermost adjacent elongated recesses closest to a narrow side can be more than twice as large as the distance between two inner elongated recesses in the center of the tray.

[0042] Preferably, the elongated recesses are distributed symmetrically across the tray. In particular, the elongated recesses can be distributed mirror-symmetrically with respect to a mirror plane running through the center of the tray and transverse to its longitudinal direction.

[0043] The elongated recesses are preferably arranged centrally parallel to the narrow sides of the tray, ie preferably at least one elongated recess has a substantially equal edge distance to both long sides of the tray, wherein manufacturing tolerances in the range of approximately 5% of the tray depth are possible.

[0044] As already described above, the tray is preferably formed as a stamped and bent part. Alternatively or in addition to stamping and bending, other forming techniques can also be used, in particular embossing or deep drawing. The tray is preferably formed as a stamped and bent part with embossed and / or deep-drawn regions. The at least one plastically deformed location, in particular the at least one elongated recess, is preferably formed monolithically with the base of the tray. Furthermore, the at least one folded edge according to the invention, preferably all folded edges, are preferably also formed monolithically with the base of the tray. In other words, the tray base, the at least one plastically deformed location and / or the at least one folded edge can be produced from a single sheet by forming.

[0045] To create the at least one plastically deformed area, at least one displacement body can be pressed into the ground from below. Such a displacement body can be formed, in particular, by a stamp or a roller. The at least one plastically deformed area can also be formed by deep drawing and / or other suitable techniques.

[0046] The solution according to the invention allows the load-bearing capacity of a shelf to be increased without additional stiffening elements such as welded supports or profiles. However, it is not excluded that a shelf according to the invention, even if it is provided with at least one elongated recess, for example, can be provided with additional stiffening elements. Merely as an example, the possibility of attaching at least one profile under the base, which runs parallel or transverse to the longitudinal direction of the shelf, is mentioned here. Such a profile can be, for example, a double-channel profile.

[0047] The negative prestress of the base - if present - or the curvature preferably has a size of +2 to -15 mm, preferably -3 to -6 mm. The values ​​<0 to -15 mm represent an upward curvature of the base. The values ​​>0 to +2 mm represent a downward curvature. As already mentioned at the beginning, the tray according to the invention also benefits from a curvature in the range >0 to 2 mm, provided that a tray without the at least one plastically deformed point has a greater downward curvature. The size is measured between the uppermost point and the lowermost point of the curvature or of the curved base, in each case on the base surface or on the underside of the base. The lowermost point of the curvature can, for example, be on the base in the immediate vicinity of a folded edge. If there is exactly one curvature, the uppermost point of the curvature is generally in the middle of the tray.If the shelf is provided with additional stiffening, such as a built-in or attached profile, the uppermost point of the curvature is usually in the middle of the non-stiffened surface of the base.

[0048] The invention is explained in more detail below using various embodiments with reference to the drawings. The combinations of features presented as examples in the embodiments can be supplemented by further features in accordance with the above explanation, depending on the properties of the tray according to the invention required for a specific application. Individual features can also be omitted from the described embodiments if the effect of this feature is not important in a specific application.

[0049] In the drawings, the same reference symbols are always used for elements with the same function and / or structure.

[0050] They show: Fig. 1 a perspective view of a first embodiment of a tray according to the invention; Fig. 2 a top view of the tray Fig. 1; Fig. 3 an exemplary exaggerated representation of the curvature of a tray according to the invention in a section through the middle of the tray; Fig. 4 a perspective view of a second embodiment of a tray according to the invention; Fig. 5 a top view of the tray Fig. 4; Fig. 6 a plan view of another exemplary embodiment of a shelf base according to the invention; Fig. 7 a plan view of another exemplary embodiment of a shelf base according to the invention; Fig. 8 is a perspective, sectional view of an advantageous embodiment of an elongated recess; Fig. 9 a cross section through the elongated recess Fig. 8; Fig. 10 a cross-section through a further advantageous form of an elongated recess; and Fig. 11 a cross section through a tray according to the invention in the area of ​​the edge.

[0051] The structure of a first advantageous embodiment of a tray 1 according to the invention is described below with reference to the Fig. 1 and Fig. 2 described.

[0052] The tray 1 serves to hold stored goods (not shown). For this purpose, the tray 1 has a base 3, the bottom surface 5 of which is accessible from above. The bottom surface 5, on which the stored goods can be placed, represents the upper side of the base 3. The volume on which the stored goods can be placed is limited at the bottom by the base 3. This volume represents a receiving area 7 of the tray 1, which in Fig. 1 is indicated by dashed lines.

[0053] The shelf 1, at least the base 3, has a substantially rectangular shape when viewed from above. Narrow sides 9 of the rectangle extend parallel to a shelf depth or depth direction T. Longitudinal sides 11 of the rectangular shape run transversely to the narrow sides 9 and extend parallel to a longitudinal direction L of the shelf. Since the shelf 1 is generally accessible along at least one long side 11, the longitudinal direction L is synonymous with a width direction of the shelf. Perpendicular to the longitudinal direction L and the depth direction T is the vertical direction V of the shelf, along which the shelf 1 extends in height.

[0054] On the narrow sides 9, the tray 1 has the folded edges 13 and on the long sides 11 the folded edges 15. The folded edges 13 and 15 serve, on the one hand, to delimit the base 3 or the base surface 5 transversely to the vertical direction V. On the other hand, the folded edges 13 and 15 absorb forces that are transmitted into them by the base 3. This stiffens the structure of the tray 1. Finally, the folded edges 13 and / or 15 can also be used to suspend the tray 1 or to transport it.

[0055] A bevel 15 according to the invention is shown below with reference to the Fig. 11 described in detail.

[0056] The narrow sides 9 and long sides 11 are generally formed from edge regions 12 and 14 of a sheet metal 21 from which the tray 1 is formed. The edge regions 12 are located on the narrow sides 9, and the edge regions 14 are located on the long sides 11.

[0057] The base 3 can have a curvature 17 or a negative prestress. The base 3 is preferably curved upwards. The curvature 17 in an unloaded state 18 is in Fig. 3 is greatly exaggerated. The dashed line in Fig. For comparison, Figure 3 is intended to represent a non-curved tray base. The curvature 17 preferably extends over at least 2 / 3 of the base 3, or the base surface 5, more preferably over the entire base 3. The size or height 20 of the curvature 17 is preferably greater than a thickness 41 of the base 3 and is preferably between 5 and 15 mm. The height 20 is measured between an uppermost point 22 and a lowermost point 24 of the curvature 17. Since the curvature 17 preferably extends over the entire base 3 of the tray 1, the uppermost point 22 is generally located in the region of the center 31 of the tray 1 or the base 3. The lowermost point 24 is generally located near a bevel 13 or 15.

[0058] Due to the curvature 17 of the base 3, the load-bearing capacity is increased compared to a tray without curvature. When stored goods are placed on the base surface 5, the base 3 initially sinks, whereby the curvature 17 becomes flatter. In the case of a tray that is not curved even in an unloaded state (as indicated by the dashed line in Fig. 3) the floor would already buckle downwards under the same load. If the floor is subjected to further load by the accommodation of additional stored goods, the floor 3 of tray 1 will also buckle downwards under a sufficiently heavy load. However, this downward buckle is correspondingly less than would be the case with a comparable tray without prior upward buckle. Accordingly, tray 1 buckles less downwards under the same load than a tray without the upward buckle. Since a large number of trays are arranged vertically one above the other in storage lifts, a higher density of trays can be achieved in the storage lift by using the tray 1 described here, since these can be arranged closer together along the vertical direction V.With conventional shelves, which curve downwards significantly, a larger gap must be maintained between two shelves arranged one above the other. Curving upwards is not absolutely necessary.

[0059] The tray 1 can also have a horizontally extending or even downwardly curved bottom 3 in the unloaded state 18. However, the bottom 3 is less downwardly curved than it would be in a comparable tray 1 without at least one plastically deformed area 19, which will be discussed below.

[0060] Although the embodiment with a curvature 17 or at least one plastically deformed area 19 represents a preferred embodiment of the tray 1 according to the invention, the presence of the curvature 17 or at least one plastically deformed area 19 is not absolutely necessary. These elements merely serve to adapt the base 3 of the tray 1 to the increased load-bearing capacity of the inventive edging 13 or 15. In other words, the base 3 is also intended to be reinforced for increased load-bearing capacity.

[0061] The curvature 17 of the base 3 can be produced indirectly. This means that a direct formation of the curvature 17 itself by forming processes can be dispensed with. Instead, the base 3 is plastically deformed at at least one location 19. Preferably, the base 3 has a plurality of such plastically deformed locations 19. Fig. 1 and Fig. 2, for the sake of clarity, not all plastically deformed points 19 are provided with a reference symbol. The at least one plastically deformed point 19 is spaced from edge regions 12 and 14 of the tray 1.

[0062] In the plastically deformed areas 19, material from the sheet metal 21 from which the base 3 is formed is presumably displaced laterally. In this case, more material is preferably displaced in the longitudinal direction L than in the depth direction T. This displacement of material can lead to an elongation of the base 3 in the longitudinal direction L. However, since the base 3 is prevented by the folded edges 13 and 15 from increasing its surface area in the longitudinal direction L and / or in the depth direction T, it bulges upwards along the vertical direction V.

[0063] At least one of the plastically deformed areas 19, preferably all of the plastically deformed areas 19, are monolithic, i.e., formed integrally with the base 3 from the material of the sheet-like material 21, hereinafter referred to as "sheet 21." Preferably, the plastically deformed areas 19 are introduced into the sheet 21 before the folded edges 13 and 15 are formed.

[0064] In a preferred embodiment, the plastically deformed areas 19 are formed as elongated depressions 23. The elongated depressions 23 preferably represent beads 25. Such an elongated depression 23 or bead 25 is shown in detail in the Fig. 8 and Fig. 9. Reference will also be made to these figures here.

[0065] Each of the plastically deformed points 19 preferably represents an upward offset 27 of the base 3. In this case, the term “recess” 23 therefore refers to a recess 23 on the underside 29 through which the base 3 is pushed upwards from the underside 29.

[0066] The elongated recesses 23 of the first embodiment run parallel to each other and to the narrow sides 9. In the depth direction T, the elongated recesses 23 are aligned with each other, so that both ends of each of them terminate at imaginary lines running parallel to the long sides 11. The elongated recesses 23 are preferably arranged equidistantly.

[0067] The center 31 of the tray base 3 is preferably free of plastically deformed areas 19. The center 31 refers to the center of the base surface 5 when viewing the tray base 3 from above. This can be advantageous for securing the tray 1 during its manufacture or the sheet 21 during its forming at its center 31, for example, by means of a rotary table of a stamping and bending machine.

[0068] Along the depth direction T, the elongated recesses 23 are preferably arranged centrally between the longitudinal sides 11 of the tray 1. This means that the distances between the elongated recesses 23 and the longitudinal sides 11 or the folded edges 13 and 15 are essentially the same on both longitudinal sides 11, whereby manufacturing tolerances in the range of 5% are possible.

[0069] The elongated recesses 23 extend along longitudinal directions 33, which preferably run perpendicular to the longitudinal direction L of the tray 1. Along the longitudinal directions 33, the elongated recesses 23 each preferably have a length 35 that is more than 1 / 3 ± 10% of the depth 37 of the tray 1. Particularly preferably, the elongated recesses 23 each preferably have a length 35 that is more than 1 / 3 ± 10% of the depth 37 of the tray 1. The depth 37 of the tray 1 refers to the depth 37 of the base surface 5.

[0070] The offset 27 preferably has a height 39 that is at most as large as the thickness 41 of the base 3. The height 39 of the offset 27 is measured from the base surface 5 on the offset 27 with respect to the base surface 5 in a region that is not offset upwards. The thickness 41 of the base 3 preferably corresponds to the thickness of the sheet metal 21 used to produce the base 3. Particularly preferably, the height 39 of the offset 27 corresponds to 0.4 to 0.7 times the thickness 41. The height 39 of the offset 27 is therefore preferably less than the height 20 of the curvature 17.

[0071] If the at least one plastically deformed location 19 is formed by a bead 25, the height 39 of the offset 27 corresponds to the bead height. Alternatively, the at least one offset 27 can also have a height 39 that is greater than the thickness 41 of the base 3.

[0072] According to an advantageous embodiment, as also described in the Fig. 8 and Fig. 9, the at least one elongate depression 23 or the bead 25 has a cross-section transverse to the longitudinal direction 33 of the elongate depression 23, which is trapezoidal. In other words, the elongate depression 23 has two mirror-symmetrical legs 43 in cross-section, which run at an angle 45 to the undeformed base surface 5. The angle 45 is preferably between 25° and 35°. The substantially straight region 47 extends between the two legs 43. The straight region 47 preferably has a length 49 extending transversely to the longitudinal direction 33 of the elongate depression 23, which length is longer than the lengths 51 of the legs 43. The elongate depression 23 therefore has a flat shape overall. The straight region 47 does not necessarily have to be exactly straight. It can also have a slight upward curvature for manufacturing reasons.

[0073] Alternatively or additionally, at least one elongated recess 23 may have a semicircular cross-section. In the case of a semicircular cross-section, the convex side preferably curves upwards into the receiving area 7. Such a cross-section is Fig. 10. Since the trapezoidal cross section consists of the Fig. 8 and Fig. 9 does not necessarily have sharp transitions due to manufacturing technology, these can also be rounded so that the cross-sectional shape overall corresponds to the semicircular shape of the Fig. 10. The rounder the transitions, the more the trapezoidal shape approximates a semicircle. Other cross-sections, especially those known for corrugations, are also possible.

[0074] In the following, a further advantageous embodiment of a tray 1 according to the invention is described with reference to the Fig. 4 and Fig. 5. For the sake of brevity, only the differences to the one with reference to the Fig. 1 and Fig. 2 described embodiment.

[0075] The second embodiment of the tray 1 according to the invention differs from that described with reference to the Fig. 1 and Fig. 2 in that the elongated recesses 23 or the beads 25 are not distributed equidistantly along the longitudinal direction L of the tray 1. Instead, the distances between two elongated recesses 23 decrease from the narrow sides 9 to the tray center 31.

[0076] The distribution of the elongated depressions 23 in the longitudinal direction L is preferably mirror-symmetrical with respect to a mirror plane extending through the center 31 and transverse to the longitudinal direction L. The distance 53 between the two outermost elongated depressions 23 is more than twice as large as the distance 55 between the two elongated depressions 23 closest to the center 31.

[0077] At the level of the tray center 31 there is an elongated recess 23 which is interrupted in the area of ​​the center 31 in order to keep the center 31 itself free, as in the previously described embodiment, in particular for the turntable of a punching and bending machine.

[0078] The Fig. 6 and Fig. 7 show only schematically two further examples of the development of plastically deformed areas 19 of the tray 1 according to the invention. The plastically deformed areas 19 of the tray 1 in Fig. 6 are formed as elongated recesses 23, which can be formed like the previously described elongated recesses 23.

[0079] In contrast to the one relating to the Fig. 1 and Fig. However, in the embodiment described in Figure 2, the longitudinal directions of the elongated recesses 23 do not run parallel to the narrow sides 9 or perpendicular to the long sides 11. Instead, the elongated recesses 23 are arranged obliquely, extending at an angle of less than 45° to the narrow sides 9. The elongated recesses 23 run parallel in groups. Here, too, the distribution of the elongated recesses 23 is preferably symmetrical with respect to a mirror plane extending through the center 31 and transverse to the longitudinal direction L.

[0080] For example only, the elongated recesses 23 are arranged equidistant from one another on one half of the tray. Alternatively, the distances between two adjacent elongated recesses 23 can also vary.

[0081] Another possible design of the plastically deformed areas 19 is shown in Fig. 7. The design is similar to that of the first with respect to the Fig. 1 and Fig. 2 described embodiment.

[0082] In contrast to the first embodiment, however, the elongated recesses 23 are not formed continuously. Instead, the Fig. The embodiment shown in Figure 7 has rows of elongated recesses 23 which extend in a row along the depth direction T of the tray 1. Each of the elongated recesses 23 has a longitudinal direction 33, which preferably also runs parallel to the depth direction T. In other words, this configuration is similar to that of the first embodiment, with the difference that the elongated recesses 23 are interrupted several times.

[0083] The Fig. 11 shows a cross-section through a folded edge 15 of a longitudinal side 11. The opposite folded edge 15 can also be shaped accordingly. However, the folded edge according to the invention is described below only with reference to one folded edge 15. It is also possible for at least one of the folded edges 13 to be shaped according to the invention.

[0084] The at least one folded edge 15 is preferably formed monolithically with the base 3 from the sheet metal 21 by forming or folding. The base 3 can be provided with at least one plastically deformed area 19. However, this is not mandatory.

[0085] The edge 15 has a vertical section 57 which extends transversely to the base 3 upwards, i.e. along the vertical direction V. The vertical section 57 delimits the base 3 of the tray 1 and represents a side wall for the tray 1.

[0086] A roof-shaped section 59 adjoins the vertical section 57. The roof-shaped section 59 is arranged such that, viewed in the vertical direction V, it does not overlap with the floor 3 or the floor surface 5.

[0087] The roof-shaped section 59 preferably has the shape of a gable roof. The roof shape is formed by sections 61 and 63, which enclose an angle 65 between them. The angle 65 is preferably between 70° and 110°, preferably 85° to 95°. Section 61 represents a reinforcement section 61 of the edge 15. The reinforcement section 61 extends the vertical section 57 upward. This increases the area moment of inertia of the vertical section 57 or the edge 15, and the shelf 1 can support a higher load. Section 63 represents a spacing section 63 of the edge 15. This will be discussed further below.

[0088] The reinforcement section 61 and the vertical section 57 form an obtuse angle 67 between them. The angle 67 is preferably between 125° and 145°, more preferably 135° ± 3°.

[0089] At its distal end 71, the folded portion 15 has the vertical tension section 69. The vertical tension section 69 preferably runs parallel to the vertical section 57. The tension section 69 and the vertical section 57 define a receiving space 70 between them. The receiving space 70 can serve to accommodate a pulling means, for example a hook or finger of a pulling device. Such a device can bear against the tension section 69 and pull the tray 1. Likewise, such a device can bear against the vertical section 57 and push the tray 1. The distance between the tension section 69 and the vertical section 57 can be adjusted by the spacing section 63, given a predetermined shape of the vertical section 57 and the reinforcing section 61.

[0090] Preferably, the spacing section 63 is formed in cross-section with mirror symmetry to the reinforcement section 61. A mirror axis runs parallel to the vertical section 57 and along the depth direction T centrally between the sections 61 and 63. This creates the symmetrical gable roof shape. With such a symmetrical arrangement, the angle 72 between the spacing section 63 and the tension section 69 corresponds to the angle 67.

[0091] At its distal end 71, the edge 15 can have a fold 73 in which material of the sheet 21 is folded upwards and onto the tension section 69.

[0092] The folded edge 15 according to the invention is not limited to the previously described form. This merely represents an advantageous embodiment. Fig.11, a further possible embodiment of a bevel 15 according to the invention is shown by means of the dashed line, which is provided with the reference number 75.

[0093] In the further embodiment, the reinforcement section 61 and the spacing section 63 are identical. In other words, the spacing section 63 extends the reinforcement section 61. From this common section 77, the tension section 69 extends vertically downward. An acute angle is formed between the common section 77 and the tension section 69.

[0094] As an alternative to the two previously described embodiments, embodiments are also possible that represent intermediate solutions between the previously described embodiments. For example, the reinforcement section 61 of the first embodiment can extend further along the dashed line and then be connected to the tension section 69 via a steeper spacing section 63.

[0095] Furthermore, it is possible for the folded section 15 to have a semicircular cross-section. Thus, the reinforcement section 61 and the spacing section 63 can each have the shape of a quarter circle in cross-section, resulting in an overall semicircle shape. A parabolic shape is also possible, in which the ascending reinforcement section 61 merges into the descending spacing section 63. List of reference symbols 1 shelf 3 Floor 5 Floor area 7 Recording area 9 Narrow side 11 Long side 12 Marginal area 13 Edge 14 Marginal area 15 Edge 17 Curvature 18 Unloaded state 19 Plastically deformed area 20 Height of the curvature 21 Sheet material 22 Topmost point of the curvature 23 Deepening 24 Lowest point of the curvature 25 bead 27 Offset 29 Underside of the floor 31 Shelf center 33 Longitudinal direction of an elongated depression 35 Length of an elongated depression 37 Depth of the shelf 39 Height of the offset 41 Strength of the floor 43 legs 45 angle 47 Straight area 49 Length of the straight section 51 leg length 53 Distance between outer elongated recesses 55 Distance between inner elongated recesses 57 Vertical section 59 Roof-shaped section 61 reinforcement section 63 spacing section 65 Angle between reinforcement section and spacing section 67 Angle between vertical section and reinforcement section 69 Vertical train section 70 recording room 71 Distal end of the edging 72 Angle between spacing section and pulling section 73 fold 75 Further embodiment 77 Common Section L longitudinal direction T Depth direction V Vertical direction

Claims

[1] Tray (1) for a storage lift, with a floor (3) for depositing stored goods, wherein the tray (1) is provided on at least one longitudinal side (11) with at least one edge (13, 15) delimiting the floor (3), and wherein the edge (13, 15) runs substantially transversely to the floor (3) in a vertical section (57) connected to the floor (3), wherein the edge (13, 15) has at least one reinforcing section (61) extending away from the vertical section (57), wherein the vertical section (57) and the at least one reinforcing section (61) enclose an obtuse angle (67) between them characterized bythat the edge (13, 15) has at least one tension section (69) at its distal end (71), to which at least one tension element of a storage lift can engage, and that the edge (13, 15) has at least one spacing section (63) which extends between the vertical section (57) and the at least one tension section (69). [2] Tray (1) according to claim 1, characterized by that the vertical section (57) and the at least one reinforcing section (61) enclose an angle (67) between 125° and 145° between them. [3] Tray (1) according to claim 1 or 2, characterized by that the at least one reinforcing section (61) extends away from the rest of the tray (1). [4] Tray (5) according to claim 1, characterized by that the spacing section (63) is identical to the reinforcing section (61). [5] Tray (1) according to claim 1, characterized bythat the at least one spacing section (63) and the at least one reinforcing section (61) enclose an angle (65) between 70° and 110° between them. [6] Tray (1) according to one of claims 1 to 5, characterized by that the at least one spacing section (63) forms a substantially roof-shaped cross-section with the at least one reinforcing section (61). [7] Tray (1) according to one of claims 1 to 6, characterized by that the at least one pulling section (69) extends transversely to the floor (3). [8] Tray (1) according to one of claims 1 to 7, characterized by that the at least one vertical pulling section (69) runs parallel to the vertical section (57). [9] Tray (1) according to one of claims 1 to 8, characterized by that the tray (1) is formed as a bent part. [10] Tray (1) according to one of claims 1 to 9, characterized bythat at least two of the following elements are formed monolithically with one another: base (3), vertical section (57), reinforcing section (61), spacing section (63), tensile section (69). [11] Tray (1) according to one of claims 1 to 10, characterized by that the base (3) of the tray (1) has at least one bead (25) at at least one point spaced from at least one edge region (12).

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