BOX WITH FOLDABLE SIDE WALLS AND LOCKING MECHANISM IN THE RIM

[0001] This application is a continuation of copending International Application No. PCT/EP2018/000123, filed Mar. 27, 2018, which is incorporated herein by reference in its entirety, and additionally claims priority from European Application No. EP 17163354.8, filed Mar. 28, 2017, which is incorporated herein by reference in its entirety.

[0002] The present invention relates to easily transportable boxes whose side walls may be folded down for transport and which comprise, for this purpose, a locking mechanism integrated into a rim. Advantageous embodiments relate to a box comprising, e.g., a slat-structure design wherein the locking mechanism is configured as a separate lock element which at the same time forms the rim of the corresponding side wall.

[0003] In the marketplace, a plurality of foldable boxes, or foldable crates, are available which consist of a bottom (or floor) and side walls which are foldable with respect to the floor, so that the boxes may be folded after use by folding down their side walls in order to be able to be transported back to the location of their renewed use in a space-saving and cost-efficient manner.

[0004] Since such foldable boxes are used industrially on a large scale and for many different purposes, for example to transport fruit or vegetables from the harvest fields to the consumers, such a foldable box has to meet many different requirements which partially influence one other. Some requirements result from the aspect of transportability. For example, it is especially desirable for the box to have a low stacking height in the folded-down state so that during transport, as large a number of folded-down boxes as possible may be transported on a pallet. Furthermore, the box should be as light as possible, i.e., as little material as possible should be used to keep the ratio between the loading capacity, or useful load, and the weight of the box to a minimum. Apart from this, since such boxes are frequently also used for transporting food, it is most useful for the interiors of the boxes to be as smooth as possible so that no food rests can get trapped inside the box. Simultaneously, the box should be stable, however, which makes the use of large, smooth planes difficult.

[0005] One further requirement relating, in particular, to ease of use when loading the goods, when cleaning the box and, above all, when presenting the goods when the box is positioned directly in the supermarket, is that the foldable exterior walls remain in a locked state (locking state) in a secure and reliable manner. To this end, so-called locking mechanisms have been used in conventional technology. Said locking mechanisms are provided, e.g., on the short exterior wall (transverse-side exterior wall). A locking mechanism from conventional technology comprises, e.g., three individual elements arranged on the exterior side of the exterior wall. Among said three exterior elements, two exterior elements are essentially identical and enable engagement into snap-in hooks, or snap-in noses, from the longitudinal-side walls (longitudinal-side exterior walls). Those two identical elements may be rotationally supported, for example, and are locked and unlocked by means of the third element of the locking mechanism, a so-called actuation lever. In particular when the box is to serve to directly present the goods in the retail trade, such mechanisms disturb the design.

[0006] As further conventional-technology examples of a locking mechanism, please refer to WO 2009/050689, U.S. Pat. No. 6,293,418, DE20 2011 102591, and EP 2 112 080. WO 2009/050689 shows a foldable box comprising two pairs of folding sides. As the locking mechanism, two folding sides have a pair of displaceable snap-in elements provided thereat which engage into the other folding sides. The displaceable snap-in elements are located on the exterior side, or exterior surface, of the folding sides. U.S. Pat. No. 6,293,418 also discloses a folding box comprising a comparable locking mechanism. DE 20 2011 102591 shows a folding container comprising a floor and four side walls pivotally hinged thereat. For locking purposes, one locking means is provided on the surface area of at least two opposite side walls in the area of the handle.

[0007] A further locking mechanism is disclosed in EP 2 112 080. Here, the lock is described as a U-profile which extends beyond the walls. Due to its shape and track of travel, however, the lock described herein restricts the freedom of design of the box, or of the side walls.

[0008] With the presentation boxes which are frequently encountered in conventional technology, the locking mechanism is at least partly shifted onto the interior side of the exterior wall (in the sense of the interior surface—which, however, entails the disadvantage that erroneous actuation of the locking mechanism by the goods might be possible. Therefore, there is a need for an approved approach.

[0009] According to an embodiment, a foldable box including a rim may have: a floor; and two longitudinal-side and transverse-side exterior walls which are foldable in relation to the floor and are located opposite one another in pairs, respectively, and two lock elements having integrated rim areas; wherein the longitudinal-side and transverse-side exterior walls each include a hinge and a free end located opposite the hinge, the two longitudinal-side exterior walls each forming a rim area along the free end; wherein the two lock elements are arranged at the free ends of the transverse-side exterior walls such that the integrated rim areas of the two lock elements and the two rim areas of the longitudinal-side exterior walls form the rim in the folded-open state of the foldable box; wherein the two lock elements are mounted to be moveable in relation to the transverse-side exterior walls to form a locking mechanism, wherein the two lock elements may be transferred from a respective locking state to a releasing state by a movement in a direction away from the floor.

[0010] Embodiments of the present invention provide a foldable box comprising a floor and two longitudinal-side and transverse-side exterior walls located opposite one another in pairs, respectively, and foldable with respect to the floor. The four longitudinal-side and transverse-side exterior walls may be connected to the floor by means of hinges, for example. Said hinges each extend along a longitudinal edge of the longitudinal-side and transverse-side exterior walls, said longitudinal edge being referred to as hinge side below. The second side/end of the longitudinal-side and transverse-side exterior walls is free and is therefore referred to as the free end. A rim area is formed along the respectively free end of the two longitudinal-side exterior walls. With the transverse-side exterior walls, the rim area is not formed by the exterior walls themselves, but two so-called “lock elements comprising integrated rim areas” are provided on the transverse-side exterior walls, namely at the free ends thereof. These rim areas of the two lock elements form the rim of the foldable box together with the two rim areas of the longitudinal-side exterior walls in the folded-open state of the foldable box. Here, it shall also be noted that said lock elements are separated from the transverse-side exterior walls because they serve as the locking mechanism. To this end, the two lock elements are mounted to be movable in relation to the transverse-side exterior walls so as to be engaged with the adjacent side walls. In accordance with advantageous embodiments, said movable mounting is configured such that the two lock elements may be moved away from the floor (e.g., upward), in the folded-open state, in a direction vertical in relation to the surface of the floor, so as to transfer the lock elements (e.g., in the upward movement) from a locking state to a releasing state. Said implementation including the upward movement has two advantages, namely that—in the event that several boxes are stacked—the bottommost box is held in the locking state and that, therefore, the side wall may be manufactured with a closed visual appearance since no gaps are required for the unlocking movements.

[0011] Embodiments of the present invention are based on the finding that by providing those parts of the transverse-side exterior walls which are referred to as lock elements with integrated rim areas above, one provides the possibility of directly integrating the locking mechanism into an area of the exterior wall which blends into the design thereof. Providing the mechanics of the locking mechanism at the upper rim furthermore offers the advantage that the mechanics are not impaired by the goods transported within the box, and is also considerably easier to implement, which reduces product complexity and the manufacturing cost associated therewith. In accordance with an advantageous embodiment, this lock element (also referred to as a rim element) is configured in one piece and extends, e.g., across the entire width of the transverse-side exterior wall.

[0012] Viewed from a different side, this means that the lock element, which advantageously comprises a profile shape such as an L-profile or U-profile (which partially extends across the side) is not arranged on the face of the side wall (as in conventional technology) but is integrated into the rim, or rim area, of the box.

[0013] In accordance with further embodiments, the two lock elements are mounted to be sprung in relation to the transverse-side exterior wall by means of respective spring mechanisms which may advantageously, or by way of example, be integrated into the respective side walls, so that the spring mechanism moves the lock element into the locking state, or retains said locking state, by means of its spring force. In accordance with further embodiments, the lock element may also be opened counter to the spring force (releasing state), so that the lock element will snap back into the locking state as soon as no exterior force acts on same, and will snap-in here. In accordance with an embodiment, this locking mechanism may include snap-in noses provided on the longitudinal-side exterior walls and extending (in the folded-open state) towards the transverse-side exterior walls. Said snap-in noses are provided at the transverse-side ends of the longitudinal-side exterior walls and are configured to be engaged with snap-in elements which belong to the lock elements or are integrated into same, so as to lock the side wall. The snap-in elements extend (in the folded-open state) toward the longitudinal-side exterior walls and are provided at the ends of the lock elements. Due to the hook shape of the snap-in hooks, the lock element and, consequently, also the snap-in elements belonging to the lock element may be lifted above the hook by means of the releasing state so as to fold in the exterior wall. In accordance with a further embodiment, the snap-in hooks comprise inwardly directed contact surfaces which are bent such that the snap-in elements of the lock elements are transferred, when the transverse-side exterior wall is moved outward (e.g., against the contact surface), from a locking state of the lock element to a releasing state so as to then snap into the snap-in hooks. Here, this force applied by means of the chamfered contact surface may act counter to the spring force of the spring mechanism. Such an implementation offers the advantage that simple snapping of the exterior walls into the locking position is possible while the spring mechanism spring-mounts, or biases, the lock element so that same will be retained in the locking state.

[0014] With regard to supporting of the lock elements it shall be noted that their bearing may be implemented by grooves, for example, which extend transverse to the transverse-side exterior walls (i.e., vertically along the transverse-side exterior wall in the folded-open state). Said grooves guide the lock element during the movement from the locking state to the releasing state, and vice versa. In accordance with further embodiments, the grooves, or at least one of the grooves, may comprise so-called “end stops” in the direction of the floor and in the opposite direction, so that the vertical movement of the lock element is restricted.

[0015] In accordance with further embodiments, the transverse-side exterior walls and/or the longitudinal-side exterior walls form a slat structure comprising one or several slats, e.g., a wooden-slat structure. Such implementations are beneficial, in particular, for so-called “presentation boxes”, by means of which the goods may be directly presented in the retail trade. Here, for example, the slats of the slat structure may extend longitudinally along the longitudinal-side and transverse-side exterior walls. One of the slats is imitated, in accordance with a further embodiment, by the lock element, so that said lock element fully blends into the exterior design. Here, it is advantageous for this slat of the lock element to be essentially the same in height, in relation to the transverse-side exterior wall, as the slat of the rim area, so that the design will also continue at the edges (/along the rim) of the foldable box. Here, “essentially” means, e.g., within a tolerance of ±1 mm or ±5 mm or, generally, within a range from 0 mm to ±5 mm.

[0016] It shall be noted at this point that in accordance with embodiments, the transverse-side exterior walls are designed to be lower (reduced height) as compared to the longitudinal-side exterior walls since the total height of the transverse-side exterior walls is defined by the combination of the lock element and the transverse-side exterior wall. In accordance with an advantageous embodiment, specifically, the lock element is located, in an encompassing manner, on the free end (on the side edge) of the transverse-side exterior wall. In other words, this means that the lock elements form, in the cross section, a bent profile (L or U), so that the lock elements may rest, with their integrated rim areas, on the free end of the transverse-side exterior walls so as to then terminate such that they are flush with the rim areas of the longitudinal-side exterior walls. Here, the locking element with its integrated rim area is located, in accordance with an advantageous variant, within the wall thickness, i.e., it does not jut out and thus forms a part of the side wall element.

[0017] In accordance with a further embodiment, the ends of the longitudinal-side exterior walls may have projections which limit foldability of the transverse-side exterior walls towards the outside.

[0018] In accordance with a further embodiment, each of the lock elements may comprise a manually actuable grip area which is advantageously arranged interiorly so as not to influence the exterior design via which the locking mechanism may be actuated. Said grip area may be a recess or a projection, for example, by means of which the lock element may be pulled upward so as to transfer it to the releasing state. The “upward” direction of movement offers the advantage that a further box which is stacked onto the actual box will retain the locking mechanism in the locking state.

[0019] In accordance with a further embodiment, the exterior wall comprises, e.g., below the lock element, a handle such as a recess, for example, by means of which the foldable box may be carried in the folded-open state. In order to prevent an error in operating the locking mechanism and/or the lock element, the handle is provided with a projection which extends along the associated lock element and shields it off, as it were.

[0027] Before embodiments of the present invention will be explained in detail below with reference to the figures, it shall be noted that elements and structures having identical actions have been provided with identical reference numerals, so that their descriptions are mutually applicable and/or exchangeable.

[0028] FIG. 1 shows a foldable box 10 comprising a floor 12, two longitudinal-side exterior walls 14a and 14b as well as two transverse-side exterior walls 16a and 16b. The longitudinal-side exterior walls 14a and 14b as well as the transverse-side exterior walls 16a and 16b are connected to the floor 12 via hinges, which here are marked by reference numerals 15a/15b for the hinges of the longitudinal-side exterior walls 14a/14b and by reference numerals 17a/17b for those of the transverse-side exterior walls 16a/16b.

[0029] In the discussion of the foldable box 10 which follows it shall be assumed that said box comprises the transverse-side exterior walls arranged in pairs (cf. reference numerals 16a and 16b) and the longitudinal-side exterior walls arranged in pairs (cf. reference numerals 14a and 14b). Pairwise occurrences of the reference numerals are indicated by the supplement “a” and/or “b”. Said supplement in the reference numerals is also used, in the further reference numerals, for the further elements which may be associated with the respective exterior walls 14a, 14b, 16a and 16b, respectively,

[0030] The longitudinal-side exterior walls 14a/14b comprise so-called rim areas 14ar and 14br, respectively. The rim area 14ar and 14br, respectively, extend along the longitudinal edge of the longitudinal-side exterior walls 14a/14b, i.e., along the free end of the side opposite to the hinges 15ab. With the transverse-side exterior walls 16a/16b, the rim is formed by so-called “lock elements” 18ab comprising an integrated rim area. The lock elements 18a and 18b extend along the free end of the transverse-side exterior walls 16a and 16b (opposite the hinges 17a and 17b). The lock elements 18a and 18b are fitted onto the exterior wall 16a and 16b such that the rim areas of the lock elements 18a and 18b along with the rim areas 14ar and 14br form the rim of the box 10. To this end, the respective lock element 18a and 18b may have a profile shape (L or U profile), so that it reaches around the free end of the corresponding transverse-side exterior wall 16a/16b. Here, advantageously, but not mandatorily, the longer leg of the profile is arranged along the exterior side.

[0031] The lock element 18a and 18b of the respective transverse-side exterior side 16a and 16b is separated from the exterior side and is mounted to be displaceable in the upward direction in relation to same (i.e., away from the floor 12). Advantageously, displacement of the lock elements 18a and 18b is effected as illustrated by the arrows F. Here, the direction of displacement F is selected such that the lock elements 18a and 18b are directed vertically upward in relation to the folded-open state of the box 10, starting from the floor 12. Said relative displacement of the lock elements 18a and 18b in the direction F enables implementing a locking mechanism which may form essentially two states, namely a locking state (depicted here) and a releasing state (in case of displacement in the F direction). The locking mechanism serves to lock the side walls 16a and 16b in relation to the side walls 14a and 14b.

[0032] In this embodiment, this locking mechanism is implemented in that the lock elements 18a and 18b engage—with respective snap-in elements, which here are marked by reference numeral 19a and 19b, respectively—into so-called “snap-in noses” 14an and 14bn, which belong to the longitudinal-side exterior walls 14a and 14b.

[0033] Thus, when the lock elements 18a and 18b are moved upward along the direction F, they will be disengaged from the snap-in noses 14an and 14bn (releasing state), so that the side walls 16a and 16b can be folded (while using the hinges 17a and 17b) onto the floor 12 in the direction of the arrows K. It shall also be noted at this point that due to said folding-in of the transverse-side exterior walls 16a and 16b, the longitudinal-side exterior walls 14a and 14b also will no longer be locked, so that they then may also be folded onto the floor 12 (while using the hinges 15a and 15b). This mechanism implements the foldability of the box. In accordance with an embodiment, the box 10 may imitate some kind of slat structure, as is depicted here as well, which comprises, for each exterior side 14a, 14b, 16a, and 16b, three slats, respectively, which extend longitudinally and are arranged one above the other. Said slats may imitate a wooden structure, even if they are made of plastic, for example, so that a wooden-design box may be implemented with the box 10 depicted here. With the transverse-side exterior walls 16a and 16b, the topmost slat, i.e., the slat at the free end of the transverse-side exterior wall 16a and 16b, is formed by the respective lock element 18a and 18b. This means, therefore, that the lock element 18a and 18b extends across the entire width of the transverse-side exterior wall 16a and 16b and blends into the slat structure design. In accordance with an embodiment, the heights of the slats are essentially identical both on the transverse- and on the longitudinal-side exterior walls, wherein “essentially” includes a certain tolerance range of up to 3 mm, 5 mm, or 8 mm. It is not mandatory for all slats to have the same height, but it is advantageous that at least the slats located at the rim or in the center or at the bottom (hinge side) have the same height, so that the slat-structure design continues accordingly.

[0034] Now that the fundamental concept of the foldable box 10 comprising mandatory and optional features has been explained with reference to FIG. 1, details and optional features will be discussed below with reference to FIGS. 2a to 2d and 3a to 3d.

[0035] FIG. 2a shows the transverse-side exterior wall 16b in combination with the associated lock element 18b in an assembled representation, whereas FIG. 2b shows the same exterior wall in an explanatory representation. FIG. 2c depicts the exterior wall 16b on its own. In FIG. 2a, the exterior wall 16b and the lock element 18b are depicted from outside, whereas FIGS. 2b and 2c illustrate an inside view. FIG. 2d also shows an interior view of the entire exterior wall 18b along with a lock element 18b.

[0036] As can be seen in FIGS. 2b and 2c, the lock element 18a and 18b, which forms the substantial part of the locking mechanism, extends across the entire width of the transverse-side exterior wall 16b. At the ends, the lock element 18b comprises engagement areas, or snap-in elements 19b. They may be formed, e.g., by a projection and/or an extension of the lock element 18b. In this embodiment, the two snap-in elements 19b comprise a recess, so that they may snap, via said recess, into the associated snap-in hooks (not shown) of the longitudinal-side exterior wall. It shall also be noted at this point that here and in any subsequent explanations it shall be assumed that for each exterior wall, two snap-in elements and, consequently, two snap-in noses are provided, which is not mandatory, however, since the functionality of “securing the folded-open state” may also be implemented for each exterior wall solely by the snap-in elements in combination with the corresponding snap-in nose.

[0037] In order to release the locking state (the state wherein the elements 19b are engaged with the snap-in hooks/snap-in noses of the longitudinal-side exterior walls) and to form the releasing state, the lock element 18b is configured to be displaceable, as was already explained at the outset. Said displaceability is guided by the grooves 16bn (cf. FIGS. 2b, 2c and 2d). Said grooves extend along the direction F, i.e., away from the floor in the vertical direction, when one assumes the box to be folded open. As a result of this, the relative movement between the element 18b and the element 16b is then guided.

[0038] As can be seen, in particular, with reference to FIG. 2d, the lock element 18b comprises an engagement area 18be on the interior side, via which the lock element may be actuated. Said engagement area 18be is configured as a depression, for example, so that one may engage into same with one's fingers so as to pull the lock element 18b in the direction F and to therefore transfer it from the locking state to the releasing state.

[0039] In accordance with a further embodiment, the exterior wall 16b comprises a handle 16bg which enables taking hold of the box 10 in the folded-open state. This handle 16bg is formed directly within the element 16b and provided with a projection 16bv, as may be gathered from FIG. 2c, so that said projection 16bv (cf. FIG. 2a) extends along the lock element 18b and surmounts same and/or is configured to be of at least equal thickness, so that during taking hold, there will be no inadvertent displacement of the lock element 18b (e.g., in the direction F) and, therefore, no inadvertent actuation of the locking mechanism. To this end, the lock element 18b may comprise, e.g., a recess 18ba for the handle 16bg.

[0040] For completeness' sake, it shall also be noted that the transverse-side exterior wall 16b includes, on the hinge side (cf. reference numeral 17b), hinge bolts 16bb which in combination with grooves (not depicted) of the floor plate (not depicted) form the hinge 17b. It shall also be noted at this point that this may also be implemented differently. In accordance with a further embodiment, the transverse-side exterior wall comprises a so-called “overlap area” 16bu in which the transverse-side exterior wall 16b abuts, in the folded-open state, on the respective longitudinal-side exterior wall 14b, so that the transverse-side exterior wall 16b is prevented from folding out further outward (counter to the direction K). As is depicted in FIG. 1, for example, to this end the longitudinal-side exterior wall 14a and/or 14b may comprise a projection 14bv and 14av, respectively, which extends, at the end of the longitudinal-side exterior wall 14a and 14b, respectively, in the direction of the transverse-side exterior wall. In order to further improve stability of the edge of the box 10, a mortise joint (cf. 16bv) may additionally be provided, at the transverse-side exterior wall 16b, with associated grooves within the projection 16bv and 14bv, respectively. The projection 16bv and 14bv, respectively, in combination with the overlap area allows limiting the movement of the side wall 16b in the line of vision of the hinge, while the mortise joint 16bv, along with the grooves, restricts movement of the longitudinal-side exterior walls 14a, 14b.

[0041] In accordance with an embodiment, such a mortise-joint element may also be integrated into the lock element 18b. Said mortise-joint element is designated by reference numeral 18bv and first and foremost performs a function comparable to that of the mortise-joint element 16bv. Optionally, the hook element 18bv, as depicted here, may also have a hook shape, so that it engages, in addition to the snap-in area 19b, into the longitudinal-side sidewall 14a and 14b or, to be precise, into the projections 14av and 14bv thereof. In this context, the hook is shaped to enable engagement in the locking state and to enable at least the movement of the side wall 16b in the direction K in the releasing state.

[0042] Even if all of the additional embodiments which were explained by means of FIGS. 2a to 2d were illustrated and/or described only in combination with the transverse-side exterior wall 16b in combination with the lock element 18b, it shall be understood that said optional features may also be implemented in the further transverse-side exterior wall 16a and/or in the further lock element 18b.

[0043] Even if in the above embodiment, mention is usually made of the locking state and releasing state, it shall be noted at this point that the locking state may be both the state of the lock element 18a/18b in relation to the transverse-side exterior wall 16a and 16b, which represents the snapped-in state of the four exterior walls 14a, 14b, 16a and 16b in the folded-open state of the box 10, and will typically be formed when the foldable box 10 is folded. In contrast thereto, the releasing state is actually the state adopted by the lock element 18a and/or 18b in relation to the transverse-side exterior wall 16a and 16b during and/or for snapping-in and during and/or for detachment. In this releasing state, the snap-in elements 19a and 19b are not engaged with the associated snap-in noses 14an and 14bn.

[0044] With regard to FIGS. 3a to 3b, additional variants for improving snapping-in and/or detachment shall once again be addressed in detail while the profile of the lock element 18a and 18b will be explained with reference to FIG. 3c. FIG. 3d shows a longitudinal-side exterior wall together with a transverse-side exterior wall, which are not engaged with each other.

[0045] FIG. 3a shows the snap-in hook, or the snap-in nose, 14bn, which is engaged with the snap-in element 19b (behind the snap-in nose, or see FIG. 2a and 2d or 3b). The snap-in nose 14bn in this embodiment is arranged on the inside of the projection 14bv of the longitudinal-side exterior wall 14b and therefore extends at the end of the side wall 14b in the direction of the transverse-side exterior wall 16b. This becomes clear once again with regard to FIG. 3d, which shows the snap-in nose 14an of the projection 14av as belonging to the longitudinal-side sidewall 14a. As can be seen here, the snap-in nose 14an (also the snap-in nose 14bn) is shaped to have an undercut 14anh into which the snap-in element 19b may snap in the locking state. The snap-in element 19b belongs to the lock element 18b, as can also be seen in FIG. 3b.

[0046] In accordance with one embodiment, the snap-in nose 14an, or the snap-in nose 14bn, is equipped with a chamfered surface 14anf and 14bnf, respectively, so that during the outward movement (cf. arrow −K in FIG. 3b), the lock element 18b is moved from the locking state to the releasing state by means of the snap-in element 19b so as to then snap into the undercut 14anh. In accordance with an embodiment, said snapping-in is supported by a spring mechanism 16bf which may form part of the side wall 16b, for example. In this context, reference shall be made to FIGS. 3b and 2c, which depict said spring mechanism 16bf. The spring mechanism is implemented as an elastically deformable cantilever here.

[0047] Advantageously, the spring element is integrated into the side wall, which offers advantages with regard to manufacturing and assembly. Alternatively, however, the spring element may just as well be formed by a separate spring or as part of the lock element 18b. Irrespective of the specific implementation, the spring mechanism 16bf is configured to move the lock element into, or retain it in, the locking position. Accordingly, the spring mechanism may optionally be designed such that there is a constant bias both in the releasing position and in the locking position.

[0048] In order to restrict the movement of the lock element 16b along the direction F, the groove 16bn may comprise one or more stops 16bna which, when the end position of the lock element 18b in relation to the transverse-side exterior wall 16b is reached, prevent further movement in the direction F. By analogy, an end position may also be formed in the opposite direction within said grooves 16bn. Alternatively, it would also be feasible for the lock element 18b to rest on the free end 16be of the exterior wall 16b. This version is shown in FIG. 3c.

[0049] FIG. 3c shows the lock element 18b in a sectional representation; by means of the profile of the lock element 18b one can see that the profile is implemented to be angulated in a planar manner, so that the lock element 18b extends, on the one side, in parallel with the transverse-side exterior wall 16b, namely on the outside, and also comprises a projection extending beyond the free end 16b. Said projection is designated by reference numeral 18bp1, whereas that area which extends on the outside of the exterior wall 16b is designated by reference numeral 18bp2. Because of the projection 18bp1, the lock element 18b may, in the locking state, rest on the exterior wall 16b and, in particular, on the free end of the exterior wall 16be. To this end, in accordance with an advantageous variant, the exterior wall 16b is configured to be shorter as compared to the exterior walls 14a or 14b, so that the lock element 18b and, in particular, the area 18bp1 ends together with the rim 14ar and 14br, respectively.

[0050] It shall be noted once again at this point that the features which have been illustrated here in connection with elements 16b and 18b may evidently also be transferred to elements 16a and 18a.

[0051] With regard to FIG. 1 it shall be noted that the clearances between the individual slats may also be approximately equal in width so as to imitate a uniform image of a slat structure. In the clearance between the lock element 18a and 18b, respectively, and the associated side wall 16a and 16b, respectively, this statement first and foremost relates to the locking state.

[0052] Even if in the above embodiments, the improved freedom of design was explained only with reference to a box imitating a wooden-slat structure, it shall be pointed out that other designs, e.g., a completely closed design, may also be implemented, of course.

[0053] With reference to FIG. 1 it shall further be noted that the box 10 may comprise not only the handles 16bg and 16ag, respectively, on the transverse-side exterior walls 16b and 16a, but may also comprise the handles on the longitudinal-side exterior walls.

[0054] In addition, it shall be noted that the box 10 may be configured, e.g., by means of an elevated hinge area 15a and 15b in the floor 12, such that the longitudinal-side exterior walls 14a and 14b may be folded onto the transverse-side exterior walls 16a and 16b. This influences the heights of the individual parts.

[0055] As was explained above, one advantageous variant is to configure the lock element 18a/18b in one piece, i.e., as one transverse strut with integrated snap-in elements 19a/19b. Alternatively, the lock element 18a/18b may also be configured in several pieces, e.g., as a profile (L or U shape) produced by means of a sandwich design.

[0056] It shall be noted at this point that the above embodiments serve only to illustrate the technical teaching and shall not restrict the scope. Said scope will be defined by the claims inserted below.

[0057] While this invention has been described in terms of several embodiments, there are alterations, permutations, and equivalents which fall within the scope of this invention. It should also be noted that there are many alternative ways of implementing the methods and compositions of the present invention. It is therefore intended that the following appended claims be interpreted as including all such alterations, permutations and equivalents as fall within the true spirit and scope of the present invention.