Grilling device, grilling grate and grilling appliance

Abstract

The invention relates to a grilling device (10) having a variable volume and / or shape, having four combustion chamber side walls (10a) and a combustion chamber base (10b), comprising a first, a second, a third and a fourth element (1, 2, 3, 4), wherein each element has two side walls (1a, 1b; 2a, 2b; 3a, 3b; 4a, 4b) and a base (1c, 2c, 3c, 4c) and is connected to two adjacent elements, wherein the combustion chamber base (10b) is formed by at least partial overlapping of the bases (1c, 2c, 3c, 4c) of all elements and each combustion chamber side wall (10a) is formed by a side wall of an element and a side wall of an adjacent element (1b, 2a; 2b, 3a; 3b, 4a; 4b, 1a) in such a way that these side walls are pushed into one another, and wherein the side walls of the elements pushed into one another are each displaceable back and forth relative to one another in the longitudinal direction (x; y) of the side walls between a minimally overlapping position and a maximally overlapping position. The invention also relates to a grilling grate for the grilling device, to a grilling appliance comprising a grilling device and to a grilling grate and, lastly, to a parts kit for assembling a grilling appliance.

Description

[0001] Grilling device, grill grate and grilling appliance

[0002] Technical field

[0003] The invention relates to a grilling device with variable volume and / or shape, a grilling grate with variable shape, a grilling appliance with a grilling device and a grilling grate and a set of parts for assembling the grilling appliance according to the respective independent claim.

[0004] background

[0005] Barbecues are widely known. A basic distinction is made between gas-powered and charcoal / wood-fired barbecues. There are numerous designs of these barbecues. Many are stationary and can be quite elaborate, equipped with temperature sensors, hoods, and so on. These are typically designed and suitable for grilling larger quantities of food. Others are portable and have few or no sensors or accessories. One problem with the latter is their limited grilling capacity. In all cases, the size of the grilling surface is predetermined. For example, if you only want to grill a small amount of food on a large stationary barbecue, a relatively large amount of fuel is required, especially with wood and charcoal grills.Because despite the small surface area occupied by the food on the grill, this large metal grate, due to its expansion and mass, requires a longer heating time to reach the required temperature. Another problem with portable grills is that they are either quite unstable but relatively easy to assemble, or more stable but complicated to assemble. A further problem arises after using such portable devices. Once assembled, they are usually difficult to disassemble, for example, due to heat-induced warping and contamination of screws, etc. Finally, they are often bulky and cumbersome to transport.

[0006] Description of the invention

[0007] It is therefore an object of the present invention to provide a solution in which at least some of the problems mentioned above are solved or reduced.

[0008] The problem is solved in a first aspect of the invention with a grilling device according to claim 1.

[0009] A second aspect of the invention relates to a grill grate according to claim 14 for the grilling device according to the first aspect of the invention.

[0010] A third aspect of the invention relates to a grilling device according to claim 17, which comprises a grilling device according to the first aspect of the invention and a grilling grate according to the second aspect of the invention.

[0011] A fourth aspect of the invention relates to a set of parts according to claim 23 for the assembly of a grilling device according to the third aspect of the invention.

[0012] Because the grilling device according to the invention has a variable volume, its size can be adapted to the amount of fuel used. The grill grate, which is also variable in area, can be adapted to the shape of the grilling device. This results in a grilling device that is flexible with regard to the amount of food being grilled and / or the fuel. With a large amount of food, the device can be extended, providing a larger grilling surface and allowing for the use of more fuel. If the amount of food is small, the device can be made smaller. The advantage of this is that, due to the smaller volume of the combustion chamber, the fuel cannot spread over a larger area than necessary, thus preventing heat from being concentrated on unused areas. This saves fuel.

[0013] Since the grill and grill grate are designed as a multi-part system and consist of individual components, they can advantageously be sold as a kit containing the individual components, which significantly saves space during storage and transport. Furthermore, individual components can be replaced if, for example, a component is damaged during shipping or use. Therefore, it is not necessary to replace the entire grill or grill grate, which improves the environmental footprint.

[0014] Brief description of the drawings

[0015] Further embodiments, advantages, and applications of the invention will become apparent from the dependent claims and from the following description with reference to the figures. These figures show:

[0016] Fig. 1 shows a perspective view of a grilling device according to the invention in a configuration with minimal volume.

[0017] Fig. 2 shows a perspective view of the grilling device according to the invention in a configuration with maximum volume,

[0018] Fig. 3 is a perspective view of the grill device according to the invention from Fig. 1 or 2 in an exploded view with individual elements; Fig. 4 is a top view showing the combustion chamber floor or the element floors of the grill device according to the invention in the configuration with maximum volume from Fig. 2.

[0019] Fig. 5 shows a perspective view of element 4 of the grilling device according to the invention from Fig. 3.

[0020] Fig. 6 is a perspective view of detail A from Fig. 5.

[0021] Fig. 7 shows a top view of a grill grate according to the invention in a configuration with maximum usable area,

[0022] Fig. 8 shows a perspective view of a grill skewer for the grilling device according to the invention.

[0023] Fig. 9 shows a side view of the grill skewer from Fig. 8.

[0024] Fig. 10 shows a perspective view of a grill according to the invention with the grilling device from Fig. 1, the grill grate from Fig. 7 and a series of grill skewers from Fig. 8 in a configuration with maximum combustion chamber volume and maximum grill grate usable area.

[0025] Fig. 11 shows a perspective view of the grill from Fig. 10 in a configuration with minimal combustion chamber volume and minimal grill grate usable area.

[0026] Fig. 12 shows a perspective view of the grill device from Fig. 11 in its folded state.

[0027] Fig. 13 shows an enlarged perspective view of the corner of the side walls of an element of the grill device from Fig. 2 in exploded view, and

[0028] Fig. 14 shows detail B from Fig. 13 illustrating interconnected side walls of the element.

[0029] Methods for Implementing the Invention A "multibody system" is understood here as a mechanical system of individual bodies that are coupled to one another by joints or connecting elements. The joints or connecting elements themselves can be part of the individual bodies. The "individual bodies" are hereinafter referred to as "elements". Linear joints are used as joints here, each of which in this context is formed by two element side walls that constitute a combustion chamber side wall, wherein one element side wall can be received into the other element side wall and is slidably held therein. Hereinafter, element side walls are referred to simply as side walls. The joint function of the linear joint is understood as a displacement of the side walls relative to each other to change the length of the combustion chamber side wall.

[0030] "Grilled food" within the meaning of this document is understood as a general term for foodstuffs suitable for grilling, e.g. meat, fish, vegetables.

[0031] In this context, the terms "inside" and "outside" refer to the combustion chamber of the grill and the surrounding area of ​​the grill, respectively. Accordingly, "inwards" means towards the interior of the grill, and "outwards" means towards the surrounding area of ​​the grill.

[0032] Figures 1 and 2 each show a perspective view of a grilling device 10 according to the invention in a configuration with minimum volume and in a configuration with maximum volume, respectively. The grilling device 10 has four combustion chamber side walls 10a with a total height h and a combustion chamber floor 10b, which together form a combustion chamber D for the fuel, and is designed as a multi-body system. As can be seen from the combined view of Figures 1 and 2, the internal volume and / or the shape of the grilling device can be varied, which is made possible by the interaction of the elements of the grilling device. The grilling device is preferably made of a metal that is heat-resistant for the maximum grilling temperatures and as light as possible, e.g., stainless steel. It is preferred if the wall thickness of the grilling device is between 0.5 and 1.5 mm.Preferably, the material and / or the wall thickness is chosen so that at the temperatures usual for grilling, no or only a slight deformation of the elements of the grilling device can occur.

[0033] For all embodiments of the grilling device 10 according to the invention, the elements of the grilling device are held together without screws. This is advantageous because the preparation of the grilling device to the ready-for-use state can be carried out quickly and no additional tools are required. Details will become apparent from the following detailed description.

[0034] Fig. 2 shows that the grill device 10 is formed from a first element 1, a second element 2, a third element 3 and a fourth element 4.

[0035] The elements of the grilling device interact with each other to achieve the intended volume and shape adjustment. Each element has two degrees of freedom, labeled x and y in the figures. The wall lengths of the elements' side walls also refer to these directions. The combustion chamber side walls are each formed by a side wall of an element that engages with an adjacent side wall of a neighboring element. This will now be explained in more detail in connection with Figure 3.

[0036] The grill device preferably has feet 40, as shown in Fig. 2 in the intended extended position during use. The feet can be retracted to facilitate transport of the grill device. For this purpose, for example, the foot shown in Fig. 2 with the reference number is rotated 90° so that it is released from a locking mechanism, and then moved upwards. Extending the feet is done in reverse. Of course, alternatives are conceivable, e.g., where the foot is folded in.

[0037] Fig. 3 shows a perspective exploded view of the grilling device according to the invention from Fig. 1 or 2, showing the first element 1, the second element 2, the third element 3, and the fourth element 4. Each element has a first side wall 1a, 2a, 3a, 4a, a second side wall 1b, 2b, 3b, 4b, and a base 1c, 2c, 3c, 4c. This view clearly illustrates the structure as a multibody system in which independent elements interact to form the grilling device, which can be modified in shape and volume. Accordingly, to form the grilling device, each element can be connected to any two adjacent elements, so that in the connected state, each element forms a corner of the grilling device. In the connected state of the elements, each combustion chamber side wall 10a is formed by the first side wall of one of the elements and the second side wall of an adjacent element 1a, 4b ; 1b, 2a ; 2b, 3a ; 3b, 4a .In other words, each of the two side walls forming a combustion chamber side wall constitutes a linear hinge. This results in four linear hinges 11a (Fig. 2), each of which allows relative movement of the respective cooperating side walls with only one degree of freedom, either in the X-direction or in the Y-direction. The first side wall of one element and the second side wall of the adjacent element can be moved back and forth relative to each other in the longitudinal direction of the side walls between a minimally overlapping position and a maximally overlapping position.Accordingly, the first side wall 1a of the first element 1 is connected to the second side wall 4b of the fourth element 4, the second side wall 1b of the first element 1 to the first side wall 2a of the second element 2, the second side wall 2b of the second element 2 to the first side wall 3a of the third element 3, and the second side wall 3b of the third element 3 to the first side wall 4a of the fourth element 4. The combustion chamber floor 10b is formed by at least partial overlap of the floors 1c, 2c, 3c, 4c of all elements, as can be seen in Figures 1, 2, and 4. The volume and shape can be changed by the relative displacement of the side walls of at least two opposing combustion chamber side walls (linear hinges).

[0038] In various configurations, the volume can be varied by the relative displacement of the side walls 1a-4b, 2b-3a or 1b-2a, 3b-4a of two opposing combustion chamber side walls from the maximum overlapping position to the minimum overlapping position, followed by a relative displacement of the side walls 1b-2a, 3b-4a or 1a-4b, 2b-3a of the other two opposing combustion chamber side walls from the maximum overlapping position to the minimum overlapping position, between a configuration with minimum combustion chamber volume and a configuration with maximum volume, and vice versa. In this example, the rectangular contour as seen from above is maintained (see Fig. 4). Naturally, intermediate positions of the side wall overlap are also possible, so that any configuration between the minimum and maximum volume configurations can be continuously adjusted.As mentioned, not only the volume of the grill can be changed, but also its shape. The shape of the grill can only be changed in the intermediate positions between the minimum volume configuration and the maximum volume configuration, since these latter extreme positions depend on the shape (wall length) of the individual elements. In the present example, the rectangular contour of the grill can be transformed into a square contour in an intermediate position by, for example, adjusting the length of two opposite combustion chamber side walls to the length of the other two opposite combustion chamber side walls. A change in the volume of the grill is explained below, starting from the minimum volume configuration. To increase the volume, the grill must first be pulled in the x-direction by pulling on a combustion chamber side wall.The volume and / or shape of the grill is increased in the y-direction. For example, if the combustion chamber side wall 4a / 3b is pulled in the y-direction, the length of the two combustion chamber side walls 1a / 4b and 2b / 3a increases. Generally speaking, the volume and / or shape of the grill is achieved by pulling / pushing a combustion chamber side wall, or successively a combustion chamber side wall and another combustion chamber side wall perpendicular to it.

[0039] In other words, not only the volume of the grill can be varied, but also its shape. For example, between the minimum and maximum volume configurations, it is possible to change only the volume by, for instance, altering the length of the combustion chamber side walls so that a rectangular outline remains, but the volume changes. Conversely, by appropriately changing the length of the combustion chamber side walls, only the shape can be changed, for example, by transforming the grill from a rectangular outline with volume VI to a square outline with volume VI. Finally, of course, both the shape and the volume can be changed.Between the minimum volume configuration and the maximum volume configuration, the shape and / or volume can be continuously (i.e., steplessly) varied, with the shape being continuously variable between a rectangular and a square contour. These possibilities illustrate the high flexibility of the grilling device and its adaptability to the fuel or food being grilled. Each combustion chamber side wall is formed by a side wall with a longitudinal guide (1a; 1b; 3a; 4a) and a side wall without a longitudinal guide (2a; 2b; 3b; 4b), such that the side wall without a longitudinal guide can be received in the longitudinal guide (9a) of the side wall with a longitudinal guide and can be moved back and forth within it.

[0040] In one variant of the grill device (not shown), the side walls of the elements are designed such that exactly one side wall of each element includes a longitudinal guide. In Fig. 3, the side wall with longitudinal guide 1b of the first element would be exchanged with the side wall without longitudinal guide 2a of the second element.

[0041] The second variant shown in Fig. 3 is preferred. In this variant, both side walls 1a, 1b of the first element 1 have a longitudinal guide 9a. Neither side wall 2a, 2b of the second element 2 has a longitudinal guide. One side wall 3a, 4a of the third element 3 and one side wall 4 of the fourth element 4, respectively, has a longitudinal guide 9a, while the other side wall 3b, 4b of the third element 3 and one side wall 4 of the fourth element 4, respectively, does not have a longitudinal guide.

[0042] The longitudinal guides 9a of the side walls are preferably formed by an L-profile open towards the combustion chamber floor 10b, which is arranged at the upper edge of the respective side wall with longitudinal guide 1a, 1b, 3a, 4a. In Fig. 3, the L-profile is most clearly visible at the reference 9a of element 4. The L-profile preferably extends continuously along substantially the entire length of the side wall with longitudinal guide. However, it is also possible for the L-profile to comprise several L-profile sections distributed along the length of the side wall. Each side wall without longitudinal guide is held at its upper edge 9b in the cavity between the L-profile or the L-profile sections and the respective side wall with longitudinal guide and is thus slidably positioned therein.It is preferred if the upper edge 9b of the side wall without longitudinal guide is thinner in the area of ​​reception in the cavity than the rest of the side wall without longitudinal guide and has a step 9c towards the interior of the grill device, which is illustrated by way of example in Fig. 3 on the third element 3. This advantageously saves material and makes it intuitively easier for the user to recognize what needs to be inserted into each other. In addition, the combustion chamber side wall can thus be designed as a completely smooth surface without steps if the L-shaped leg of the longitudinal guide parallel to one side wall is flush with the surface of the cooperating other side wall. The longitudinal guides could, however, be implemented in a variety of alternative plug connections. They could also be arranged at other points along the side walls.However, the arrangement at the top edge is preferred because it provides comparatively high stability and avoids a potential gap between two adjacent side walls.

[0043] Both side walls of each combustion chamber side wall preferably each have a first limiting element 5a, 5b to prevent the elements of the grilling device from unintentionally separating completely from one another. The first limiting elements engage with each other upon reaching the minimally overlapping position in such a way that further separation of the side walls is prevented. In a preferred embodiment, a first limiting element of the element side wall with longitudinal guidance is designed as an outwardly projecting sawtooth-shaped step, and a first limiting element of the element side wall without longitudinal guidance is designed as an inwardly projecting sawtooth-shaped step. The flanks of the sawtooth-shaped steps, which are perpendicular to the respective element side wall, face each other.

[0044] In principle, the projections 5a of the side walls with longitudinal guidance point towards the combustion chamber, and the projections 5b of the side walls without longitudinal guidance point outwards. When two side walls are inserted into each other for the first time, the projection 5b of the side wall without longitudinal guidance must overcome the projection 5a of the side wall with longitudinal guidance. For this purpose, the projections are designed with stepless contours towards the lateral edge of the corresponding side wall, so that they can easily slide over each other and lock into place after overcoming the highest point. They can also have steps. During this process, the side wall without longitudinal guidance is slightly bent towards the combustion chamber, creating tension that is released upon reaching the highest point of the projections by the snapping of the projection 5b of the side wall without longitudinal guidance towards the side wall with longitudinal guidance.On this side, the projections each have a step, so that when the side walls are pulled apart, they abut each other and prevent further separation. However, it is possible to completely separate the elements of the grill by the user pushing the respective side wall without longitudinal guide slightly towards the combustion chamber, thus overcoming the step of the projection on the cooperating side wall with longitudinal guide. Advantageously, the grill according to the invention is safer due to the use of the projections and cannot be accidentally disassembled into its individual parts, e.g., if only an increase in volume or a change in shape is desired. Due to the special design and position of the projections, the user must perform specific, deliberate steps to disassemble the grill into its individual parts.

[0045] Alternatively or additionally, the first limiting elements can be arranged in the L-profile of the longitudinal guides 9a or at the upper edges without an L-profile 9b of the side walls. They are designed as described above, wherein one projection of the upper edge of one side wall extends vertically upwards and the cooperating projection of the L-profile of the longitudinal guide 9a of the other side wall extends vertically downwards and is arranged in the rail formed by the L-profile.

[0046] Fig. 4 shows a top view of the grilling device and the arrangement of the bases of the elements.

[0047] In the present example, as already mentioned, the grill has a rectangular outline when viewed from above in its extreme positions. However, it could also be square. This would be achieved by making the side walls of each element the same length (x and y directions).

[0048] The bottoms 1c, 2c, 3c, 4c of the elements are preferably arranged and configured such that, during the relative displacement of the side walls, they overlap to a greater or lesser extent in a predetermined sequence depending on the degree of displacement, so that the combustion chamber floor comprises at least four floor layers in certain areas. Maximum overlap of the floors is achieved in the minimum volume configuration (Fig. 1), in which all four floors are essentially stacked on top of each other. Minimal overlap of the floors is achieved in the maximum volume configuration shown in Fig. 2.

[0049] The aforementioned predetermined order of the bases is preferably chosen such that the base of the second element, i.e., in the preferred embodiment of the grill device, element 2 with two side walls without longitudinal guides, is arranged at the top and, in the minimum volume configuration, forms the inside of the combustion chamber floor. The base of the first element 1, i.e., the element with two side walls and longitudinal guides, is arranged at the bottom and, in the minimum volume configuration, forms the outside of the combustion chamber floor. Preferably, the minimum volume configuration, i.e., with maximum overlap of the bases, is achieved when at least one of the bases of element 2, 3, or 4 abuts one of the side walls of another element.

[0050] The design of the bases is explained in more detail below, which is best seen in conjunction with Figures 3 and 4. In principle, the bases of the elements can be slotted together according to the same principle as the side walls, by providing base guides similar to the longitudinal guides of the side walls, so that these are also referred to as linear joints. This significantly increases the stability of the grilling device. However, the bases could also be designed without base guides and simply overlap during assembly of the grilling device without interlocking. Since the grilling device according to the invention is preferably made of metal, the bases could, for example, be made thicker than the walls, so that stability is still ensured without base guides. However, the design with base guides is preferred, as it is safer with regard to the weight of the hot fuel that the combustion chamber floor has to bear.

[0051] In this arrangement, two adjacent bases are nested together, forming a first base pair 1c, 4c and a second base pair 2c, 3c. Each base has a first edge (referencing 8a, 8b in Fig. 3) and a second edge perpendicular to it (referencing 8c, 8d in Fig. 3), with the first edges of the bases being parallel to each other and the second edges of the bases being parallel to each other. One base 1c, 3c of each base pair has a first base guide 8a on its first edge, while the other base 2c, 4c of each base pair has no base guide on its first edge. The shelves with first shelf guide 1c, 3c are not adjacent, wherein the first edge of each shelf without shelf guide 2c, 4c can be received in the first shelf guide 8a of one of the shelves with first shelf guide and is slidable back and forth therein. In Fig.In step 3, the fourth element is inserted into the first element by simultaneously inserting the edge 9b of the side wall of the fourth element into the longitudinal guide of the side wall of the first element and the bottom edge 8b of the fourth element into the bottom guide 8a of the first element. In this way, the bottom 4c lies above the bottom 1c. This procedure is analogous for inserting the second element into the third element. Thus, the two bottom pairs are formed. In a further step, the bottom pairs must now be connected to each other.

[0052] The base without a first base guide 4c of the first base pair has a second base guide 8c on its second edge, and the base with a first base guide 3c of the second base pair can be received in the second base guide 8c with its second edge 8d and is thus able to slide back and forth within it. This means that the base 2c belonging to the second base pair has neither a first nor a second base guide. In this way, the base pairs are connected to each other and, in a broader sense, also form a linear hinge. Naturally, the side walls are also connected, similarly to how the elements for forming base pairs are connected above.Thus, when the edge 8d of the base 3c is inserted into the base guide 8c of the base 4c, the edge 9b of the side wall of the third element is simultaneously inserted into the longitudinal guide 9a of the side wall of the fourth element and the edge 9b of the side wall of the second element is inserted into the longitudinal guide 9a of the side wall of the first element.

[0053] Figure 4 shows that the bottom pair 1c / 4c lies below the bottom pair 2c / 3c. The bottom 2c belonging to the second bottom pair, without a first or second guide, is the uppermost bottom when the bottoms overlap, and the adjacent bottom 1c of the first bottom pair is the lowermost bottom.

[0054] As mentioned, the base guides 8a, 8c are preferably designed similarly to the longitudinal guides of the side walls. The first base guide 8a and the second base guide 8c are each designed as an L-profile open laterally towards the opposite side wall of the associated element (Fig. 3 at reference 8c). The first edges 8b received in the first base guide 8a are each thinner than the rest of the respective base and have a step towards the interior of the grilling device. The second edge 8d received in the second base guide 8c is thinner than the rest of the base 8c and has a step towards the interior of the grilling device. This design is analogous to the thinner edges of the side walls without longitudinal guides.

[0055] Fig. 5 shows a perspective view of element 4 (see Fig. 3) of the grill according to the invention, and Fig. 6 shows a detailed view of detail A from Fig. 5. The two figures are intended, among other things, to illustrate a further advantageous, optional feature of the grill according to the invention, which is particularly advantageous when the grill is designed with foldable combustion chamber side walls. The foldability feature is particularly preferred and is explained in more detail in connection with Figs. 11-14. In connection with Fig. 3, a method for preventing the separation of the elements from one another in the upright state of the elements by means of the first limiting elements 5a, 5b has already been described.This feature provides a solution for preventing the elements from unintentionally separating completely from one another when the side walls are upright and ready for use, but this solution obviously does not apply when the side walls are folded down. The stopper system addresses this latter case. This has the advantage that the folded grill can be conveniently stored without having to worry about keeping the elements together. The separation of the elements when folded down is preferably prevented by means of second limiting elements 16a, 16b, which interact identically to the first limiting elements, hereinafter referred to as stoppers. These second limiting elements are integrated into the element bases, as only these are connected to each other when the combustion chamber side walls are folded down.As shown by way of example for element 4, the first stoppers 16a can project downwards out of the combustion chamber, or the second stoppers 16b can project upwards into the combustion chamber, depending on the element base. In conjunction with Fig. 3, taking into account the sequence of overlapping element bases (Fig. 4: from bottom to top: base 1c, 4c, 3c, 2c), the following results from detail A: Base 1c has two first stoppers 16a for interaction with second stoppers 16b of base 4c. Base 4c has two second stoppers 16b for interaction with first stoppers 16a of base 3c. Base 3c has two second stoppers 16b for interaction with first stoppers 16a of base 2c. Bottoms 1c and 2c do not need to interact with each other, as bottoms 4c and 3c already provide the necessary stopping effect in the x-direction.

[0056] Detail view A also shows that element 4 has the base guide 8c to receive the joined elements 2 and 3 by means of the base guide 8d of element 3 and further has the edge 8b for receiving in the base guide 8a of element 1.

[0057] Fig. 7 shows a top view of a grill grate according to the invention in a configuration with maximum usable area. It should be noted that this view is from the underside of the grill grate to better illustrate the interlocking of the grate elements. In the view from Fig. 10, the side of the grill grate shown here faces the combustion chamber. According to the invention, the grill grate 30 is designed to hold food being grilled and, like the grilling device, is also designed as a multi-body system. It has a variable shape and a nominal usable area that is adjustable between a configuration with minimum usable area and a configuration with maximum usable area, and vice versa. According to the invention, the grill grate is formed from four grate elements 31, 32, 33, 34, which constitute the nominal usable area of ​​the grill grate, and the nominal usable area can be changed by at least partial overlap of the grate elements.The grate elements each have a first inner edge and a second inner edge arranged perpendicular to it, and each has a first outer edge and a second outer edge arranged perpendicular to it. According to the invention, two adjacent grate elements 31, 34; 32, 33 are slidable into one another, so that a first pair of grate elements 31, 34 and a second pair of grate elements 32, 33 are formed, wherein one grate element 31, 33 of each pair of grate elements has a first grate guide 38a at the first inner edge, and the other grate element 34, 32 of each pair of grate elements does not have a grate guide at the first inner edge. According to the invention, the grate elements with first grate guidance are not adjacent, wherein the first inner edge of each grate element without grate guidance can be received in the first grate guidance of the associated grate element with first grate guidance and can be moved back and forth therein.According to the invention, the grate element 34 without a first grate guide of the first grate element pair has a second grate guide 38c on its second inner edge, and the grate element 33 with a first grate guide of the second grate element pair is able to be received in the second grate guide 38c with its second inner edge which does not have a grate guide and can be moved back and forth therein.

[0058] According to the invention, this results in exactly one grate element 32 belonging to the second pair of grate elements, without a first grate guide and without a second grate guide.

[0059] In various embodiments, the grate element 32 belonging to the second grate element pair 32, 33, without a first grate guide and without a second grate guide 38c, is the uppermost grate element when the grate elements overlap, and the adjacent grate element 31 of the first grate element pair 31, 34 is the lowermost grate element, with the uppermost grate element 32 resting on the first grate guide 38a of the lowermost grate element 31. The grate elements, in order to form the entire nominal usable area of ​​the grill grate, are constructed according to the same principle as the element bases already described for the grilling device, with regard to their interaction with each other, as is particularly evident in conjunction with Fig. 4. Accordingly, the overlap sequence is also the same as for the element bases.

[0060] It should be noted, however, that unlike the combustion chamber floor (D), where any necessary guides for the element bases are optional, the grate guides are mandatory for the grill grate. In the combustion chamber floor, the element bases, along with the side walls, are integral parts of the corresponding components. In other words, the element bases cannot fold over, as they are built as a single piece at a 90° angle to the side walls. In contrast, the grill grate consists of flat grate elements, so without grate guides, the grill grate would have no additional support and would collapse.

[0061] In its various forms, the grill elements each have parallel bars 37a with gaps 37b between adjacent bars. The bars in each grill element are arranged and spaced apart such that, in the maximum and minimum overlapping configurations of the grill elements, the gaps of all grill elements lie one above the other when viewed perpendicular to the nominal usable area. This is best seen in Fig. 11. This ensures that, in the minimum and maximum usable areas, there are always a maximum number of gaps through which the heat from the combustion chamber can reach the food being grilled. In intermediate positions, due to the stepless adjustment, areas can naturally arise where a bar of a grill element lies over a gap and at least partially closes it. This can have the advantage that food requiring less heat, or...Food that needs to be grilled for a longer time can be placed on these areas, while food that requires direct heat can be placed on the non-overlapping areas. The user can configure the usable area of ​​the grill grate as desired.

[0062] Fig. 8 shows a perspective view of a grill spit for the grilling device according to the invention, and Fig. 9 shows a side view of the grill spit from Fig. 8. Another embodiment is described in more detail in connection with Fig. 11.

[0063] In the embodiment shown in Fig. 8, a grill skewer 60 comprises a handle 61, which is preferably wide enough to fit precisely into a recess in the grill grate, which is advantageous during transport. This functionality is explained in more detail in connection with Fig. 11.

[0064] An adjustment rail 61 is attached to the handle, in which the actual skewer 63 for the food being grilled can be moved back and forth. As can best be seen in Fig. 9, holes 64 are provided in the adjustment rail, which serve to adjust the length of the entire skewer. The skewer 63 is designed so that it can be attached to and removed from these holes 64. This allows the grilling skewer to be adapted to the dimensions of the combustion chamber. Since the grilling skewer is only placed on the walls of the combustion chamber, such a stepped adjustment of the grilling skewer length is perfectly sufficient, even though the dimensions of the combustion chamber are continuously variable. Obviously, the grilling device described below in connection with Fig. 10 is operated without a grill grate in a preferred embodiment for the grilling skewers. However, it is also possible to provide a combination of grill grate and grill skewers. In this case, for example, the length L4 (Fig. ) could be...7) The length of the grill grate, which would normally be adapted to the length LI of the combustion chamber, can be chosen to be smaller, so that the grill grate does not cover the entire combustion chamber. In the remaining free area, grill skewers could be placed on the corresponding combustion chamber side walls, so that different types of food could be grilled simultaneously.

[0065] Fig. 10 shows a perspective view of a grill according to the invention, comprising the grilling device from Fig. 1, the grill grate from Fig. 7, and a series of grill skewers from Fig. 8 in a configuration with maximum combustion chamber volume and maximum grill grate usable area. The dashed lines indicate how the elements are positioned one above the other. According to the invention, the grill grate rests on the upper surface of the combustion chamber side walls in the outer edge region. As mentioned, the side of the grill grate shown in the view from Fig. 7 faces the combustion chamber and is not visible here.

[0066] Preferably, each outer edge of a grate element that rests on an element with a longitudinal guide 9a has an adjustment guide 39a (see Fig. 7), and each outer edge of a grate element that rests on an element with an upper edge without a longitudinal guide 9b itself has an upper edge without an adjustment guide 39b. Each adjustment guide 39a is designed such that it accommodates an adjacent upper edge without an adjustment guide 39b and the underlying longitudinal guide 9a of the corresponding element side wall, such that a user-induced change in the volume and / or shape of the combustion chamber results in a corresponding user-induced change in the usable area of ​​the grill grate by simultaneously pushing the grate elements together or pulling them apart. Alternatively, in a simpler embodiment, the outer edges may not have any adjustment guides.In this case, the user must ensure that the length or width of the grill grate is large enough to easily place it on the combustion chamber walls.

[0067] Fig. 11 shows a perspective view of the grill from Fig. 10 in a configuration prepared for transport. The dashed lines illustrate how the elements fit together. At the same time, the reader can imagine the grill grate area being slightly larger to achieve a configuration with minimal combustion chamber volume of the grill and minimal usable grill grate area. This figure illustrates what is referred to here as the "transport overlap," which is slightly larger than the previously defined "maximum overlap" of the element side walls and bases of the grill and the grate elements of the grill. The "maximum overlap" refers to the operating conditions of the grill.

[0068] In the context of transport overlap, it is preferred that the minimum length L4 and the minimum width L3 (Fig. 7) of the grill grate are slightly smaller than the minimum length LI and the minimum width L2 (Fig. 4), respectively, of the combustion chamber. In this transport configuration, the transport area of ​​the grill grate is just smaller than the minimum usable area of ​​the grill grate in operation, such that it can be accommodated in the combustion chamber. In this context, analogous to "transport overlap" and "maximum overlap," it should be noted that the term "usable area" throughout this document is to be understood as meaning that the dimensions of the grill grate are such that the grill grate can rest on the combustion chamber side walls. The "transport area," as used in this context, is smaller. In other words, there can be no talk of usable area if the grill grate were to fall into the combustion chamber.

[0069] Fig. 11 also shows another preferred embodiment of the grill skewers. In its shortest length, the grill skewer, like grill skewer 60 (Fig. 8), can be inserted into the space between two rods. However, each grill skewer 60a is designed as a telescopic rod, so that, unlike grill skewer 60, its length is continuously adjustable. Another difference is that no handle is provided. This allows the grill skewer to be made slimmer, so that two grill skewers can fit in the space between two adjacent rods during transport. Of course, a combination of the two embodiments in one grill is also conceivable.

[0070] Finally, Fig. 11 shows hinges 22 provided on each side wall, which, in a particularly preferred embodiment of the grill device, cause both side walls of each element to be foldable inwards. They can be folded from an upright position, in which they form a 90° angle with the ground, to a folded position, in which they are parallel to the ground, in particular lying in a plane with the ground, and vice versa. The upright position corresponds to the ready-for-use position, and the folded position corresponds, for example, to a preferred delivery position of the grill device and has the advantage that the delivery of grill devices, or more generally the transport of the grill device, is space-saving. This embodiment will now be explained in more detail.

[0071] Fig. 12 shows a perspective view of the grill device from Fig. 11 in its folded state. In conjunction with Fig. 11, preferred embodiments of the grill device according to the invention are now explained, which are related to the already mentioned preferred functionality of folding the grill device. It can be seen that the hinges 22 for folding down the element side walls or the combustion chamber side wall are arranged at different heights hl, h2 relative to the combustion chamber floor.

[0072] It is preferred if the element side walls of two opposing first combustion chamber side walls (here, by way of example, combustion chamber side walls a1a, 4b; 2b, 3a) have hinges 22 at a first height hl, and the element side walls of the other two opposing second combustion chamber side walls (here, by way of example, combustion chamber side walls 1b, 2a; 4a, 3b) have hinges 22 at a second height h2. The hinges divide the respective side wall into a lower wall section 21a rigidly connected to the base and a hinged upper wall section 21b. The second height h2 is so much smaller than the first height hl that, after the upper wall sections of the second combustion chamber side walls are hinged, the upper wall sections of the first combustion chamber side walls can be hinged in the same way, so that they come to rest on the upper wall sections of the second combustion chamber side walls.In other words, this ensures that the first combustion chamber side walls can also be folded down to a position parallel to the combustion chamber floor. Specifically, the second height h2 is at least equal to the greatest wall thickness of the corresponding combustion chamber side wall and therefore less than the first height hl, preferably even slightly less. This allows the grill to be folded up, which greatly improves transportability.

[0073] In various embodiments, it is preferred that the second height h2 of the hinges 22, which, in the inwardly folded state of the combustion chamber side walls, are associated with the lower two combustion chamber side walls or the lowest combustion chamber side wall, is selected such that the grill grate, in the inwardly folded state of the combustion chamber side walls, can be received in the space between the combustion chamber floor and the lower two combustion chamber side walls or the lowest combustion chamber side wall. This advantageously allows the grill to be designed very compactly, which in turn offers significant advantages for transport. Another advantage is that the grill grate, which is typically dirty after use, can be stored inside the grill without contact with the outside and thus poses virtually no risk of soiling other objects during transport.

[0074] In the execution forms, the total height h of the side walls is in accordance with the formula

[0075] 2h < min ( { Ll m -j_ n , L2 min} ) ... ( 1 ) chosen , where

[0076] Ll m into the minimum length of the grill device (in the configuration with minimum volume) and L2 m -j_ n The minimum width of the grilling device (in the minimum volume configuration) is .

[0077] In other words, the smaller of the two values ​​between the minimum width and minimum length of the grill is considered in the configuration with minimum volume (for rectangular grills, obviously the same for square grills). The overall height is then chosen so that, when the grill is folded, both sides of each pair of opposite sides lie in the same plane and do not overlap (hence the height in the formula is multiplied by a factor of two). In other words, the first two opposite sides of the combustion chamber lie side by side, and the other two sides lie side by side over the first two. This allows the grill to be narrower when folded, which is also advantageous for transport.

[0078] In principle, the hinges on each side of the combustion chamber can of course be positioned at an individual height, provided that each hinge folds over the next lower side of the combustion chamber as explained above. Optionally, the sides of the combustion chamber could overlap when folded, however, this is not preferred as it would significantly increase the thickness of the folded grill.

[0079] Fig. 13 shows an enlarged perspective view of an embodiment of the corner of the side walls of an element of the grill device from Fig. 2 in exploded view.

[0080] Fig. 14 shows detail B from Fig. 13 illustrating interconnected side walls of the element.

[0081] While in a rigid version of the grilling device the elements can be designed without the features described below, so that the side walls of the respective elements are rigidly and permanently connected to one another, it is preferred if the grilling device is foldable and has a corresponding fastening system 17a-17c for detachably fastening the side walls of an element to one another in an upright position forming a corner of the grilling device, corresponding to the intended use of the grilling device. This allows the grilling device to be advantageously folded in and out as desired.

[0082] In a preferred embodiment, the fastening system comprises a clamp 17a, a pin 17b, and a tab 17c. The arrangement and function of these parts will now be described by way of example using element 4.

[0083] The clamp 17a is arranged in the side edge region of one side wall 4b, the clamp being designed and oriented such that a corresponding side edge of the other side wall, when folded up into the upright position, acts upon the clamp and can be clamped therein. Specifically, the clamp extends essentially parallel to one side wall. As best seen in Fig. 14, the clamp is arranged with sufficient distance from one side wall so that, when the other side wall 4a is clamped in the y-direction (after the side wall 4a has been folded inwards), it can yield elastically, allowing the edge of the other side wall to be pressed past a locking ridge 17d and, as the clamp returns to its rest position (x-direction), to come to rest in a subsequent recess. To release the connection, the process is carried out in the opposite direction.

[0084] Pin 17b protrudes upwards from the upper edge of the other side wall 4a.

[0085] The tab 17c projects downwards from the upper edge of one side wall 4b into the combustion chamber, with a gap between the tab and one side wall.

[0086] The pin and the tab cooperate when clamping the side edge of the other side wall 4a into the clamp. During this process, the pin 17b comes to rest in the aforementioned gap. The tab / pin assembly provides a "counterhold" for the clamp 17a. Without this assembly, the clamping effect could not be achieved, since the length of the combustion chamber side belonging to side wall 4a is variable, and if an intended widening were to occur, the side edge would simply be pulled out of the recess. In other words, the clamp alone could only be used with a side wall whose length cannot be changed. If, in this preferred embodiment, the combustion chamber side wall is enlarged along with side wall 4a, the tab, due to its stop-action effect for the pin, prevents side wall 4a from being "pulled along" in the X-direction during the enlargement.

[0087] Advantageously, this mechanism allows the combustion chamber side walls to be folded in and out as desired and ensures that the combustion chamber side walls remain in an upright position and cannot unintentionally fall into the combustion chamber.

[0088] In some versions, the combustion chamber side walls, which are at the top when folded in, each have additional (not shown) fastening elements, e.g., clip locking mechanisms, to hold them in the folded-in position so that they do not unfold unintentionally, e.g., during transport.

[0089] The grilling device according to the third aspect of the invention can preferably be delivered as a kit. All four elements 1, 2, 3, 4 are delivered in the form shown in Fig. 3 in combination with Fig. 10 or 11. They can be assembled by the user to form a grilling device. Alternatively, the grilling device can be delivered as a whole in the form shown in Fig. 12, with the grill grate and any necessary skewers stored inside the grilling device (not visible in Fig. 12).

[0090] The present invention has the key advantage of providing a grilling device that can be flexibly adapted to the respective needs of the users with regard to grilling quantity and efficiency by changing its shape / volume. Furthermore, this solution, in its foldable form, is very space-saving when not in use and very suitable for convenient transport. Since screw connections or other connections requiring tools have been eliminated, assembly and switching between transport configuration (device folded) and operating configuration (device unfolded) are very simple.

[0091] While preferred embodiments of the invention are described in the present application, it should be clearly pointed out that the invention is not limited to these and can also be carried out in other ways within the scope of the following claims.

[0092] In this description, terms such as "preferred", "particularly", "advantageous", etc. refer only to optional and exemplary forms of implementation.

Claims

Patent claims 1. Grilling device (10) for receiving fuel, wherein the grilling device is made of a refractory material and forms a combustion chamber (B) for the fuel, wherein the combustion chamber has a variable volume and / or a variable shape, wherein the combustion chamber is convertible between a configuration with minimum volume and a configuration with maximum volume and vice versa, wherein the combustion chamber is designed as a multibody system and comprises a first, a second, a third and a fourth element (1, 2, 3, 4), wherein each element has two element side walls (1a, 1b; 2a, 2b; 3a, 3b;4a, 4b) and an element base (1c, 2c, 3c, 4c) and is connected to two adjacent elements such that each element forms a corner of the combustion chamber, wherein a combustion chamber base (10b) of the combustion chamber is formed by at least partial overlap of the element bases (1c, 2c, 3c, 4c) of all elements and each side wall (10a) of the combustion chamber is formed by an element side wall and an adjacent element side wall (1b, 2a; 2b, 3a; 3b, 4a; 4b, 1a) such that these adjacent element side walls are nested, and wherein the nested element side walls are each displaceable relative to each other in their longitudinal direction (x; y) between a minimally overlapping position and a maximally overlapping position, wherein each combustion chamber side wall is defined by an element side wall with a longitudinal guide (1a; 1b; 3a; 4a) and an element side wall without a longitudinal guide (2a; 2b; 3b;4b) is formed in such a way that the element side wall without longitudinal guide can be received in the longitudinal guide (9a) of the element side wall with longitudinal guide and can be moved back and forth therein, wherein the change of the volume and / or shape of the combustion chamber by a change of a length (LI; L2) of; at least two opposing combustion chamber side walls (10a) can be effected.

2. Grill device according to claim 1, wherein the change in volume and / or shape of the combustion chamber can be effected by changing a length (LI; L2) of any two opposing combustion chamber side walls and subsequently by changing a length (LI; L2) of the other two opposing combustion chamber side walls.

3. Grilling device according to one of the preceding claims, wherein - exactly one side wall of all elements includes a longitudinal guide, or wherein - both element side walls (1a, 1b) of the first element (1) have a longitudinal guide (9a), - no element side wall (2a, 2b) of the second element (2) has a longitudinal guide, and - one element side wall (3a; 4a) of the third element (3) and of the fourth element (4) has a longitudinal guide (9a) and the other element side wall (3b; 4b) of the third element (3) and of the fourth element (4) does not have a longitudinal guide.

4. Grilling device according to one of the preceding claims, wherein the longitudinal guides (9a) are designed as L-profiles open towards the combustion chamber floor (10b), which are arranged at the upper edge of the respective element side wall with longitudinal guide (1a, 1b, 3a, 4a), wherein the L-profiles extend continuously substantially along the entire length of the respective element side wall with longitudinal guide, or wherein the L-profiles each comprise several L-profile sections distributed along the length of the element side wall comprising, wherein each element side wall without longitudinal guide (2a; 2b; 3b; 4b) is able to be received and slidably held in a cavity formed by the L-profile or L-profile sections and the respective element side wall with longitudinal guide with its upper edge (9b).

5. Grilling device according to one of the preceding claims, wherein each element base (1c, 2c, 3c, 4c) has a first edge and a second edge arranged perpendicular thereto, wherein the first edges of the element bases are parallel, wherein two adjacent element bases (1c, 4c; 2c, 3c) are slid into one another, so that a first element base pair (1c, 4c) and a second element base pair (2c, 3c) are formed, wherein one element base (1c, 3c) of each element base pair has a first base guide (8a) at the first edge and the other element base (2c, 4c) of each element base pair does not have a base guide at the first edge, wherein the element bases with first base guides (1c, 3c) are not adjacent, wherein the first edge of the element bases without base guides (2c, 4c) can be received in the first base guide (8a) of the associated element base with first base guide and can move back and forth therein. is movable and durable,wherein the element base without first base guide (4c) of the first element base pair has a second base guide (8c) on its second edge and the element base with first base guide (3c) of the second element base pair with its second edge (8d) which has no base guide is able to be received in the second base guide (8c) and is able to be moved back and forth therein, whereupon exactly one element floor (2c) belonging to the second element floor pair is obtained without a first floor guide and without a second floor guide.

6. Grilling device according to claim 5, wherein the element base belonging to the second element base pair without a first base guide and without a second base guide (2c) is the uppermost element base when the element bases overlap, and the adjacent element base of the first element base pair (1c) is the lowermost element base, wherein the element (2) with the uppermost element base (2c) is designed such that the uppermost element base (2c) comes to rest on the first base guide (8a) of the element (1) with the lowermost element base (1c).

7. Grill device according to one of claims 5 or 6, wherein the first floor guides (8a) and the second floor guide (8c) are each designed as an L-profile open laterally towards the opposite side wall of the associated element.

8. Grilling device according to one of the preceding claims, wherein both element side walls of each combustion chamber side wall each have a first limiting element (5a, 5b), wherein in the assembled state of the grilling device the first limiting elements engage with each other upon reaching the minimally overlapping position in such a way that further separation of the element side walls is prevented, in particular wherein a first limiting element of the element side wall with longitudinal guide is designed as an outwardly projecting sawtooth-shaped step and a first limiting element of the element side wall without longitudinal guide is designed as an inwardly projecting sawtooth-shaped step, wherein The sides of the sawtooth-shaped steps, which are perpendicular to the respective element's side wall, face each other.

9. Grilling device according to one of the preceding claims, wherein the grilling device is designed such that the element side walls (10a) at a certain height (hl; h2 ) from the lowest element base (1c, 2c, 3c, 4c) each have at least one hinge (22), preferably three hinges (22), more preferably six hinges (22), which hinge divides the respective element side wall into a lower wall section (21a) rigidly connected to the element base and an upper wall section (21b) that folds inwards towards the combustion chamber, wherein in an assembled state of the grilling device the upper wall sections can be folded inwards in the configuration with minimum volume, so that they lie substantially parallel to the combustion chamber base above it.

10. Grilling device according to claim 9, wherein the element side walls of two opposing first combustion chamber side walls have hinges (22) at a first height (hl) and the element side walls of the other two opposing second combustion chamber side walls have hinges (22) at a second height (h2), wherein the second height (h2) is so much smaller than the first height (hl) that, after folding down the upper wall sections of the second combustion chamber side walls, the upper wall sections of the first combustion chamber side walls can be folded down in the same way so that they come to rest on the upper wall sections of the second combustion chamber side walls.

11. Grilling device according to one of the preceding claims, wherein a total height (h) of the side walls of the formula 2h < min ( {Llj-^g , h2^£^} ) suffices, where Ll m in the minimum length of the grilling device (in the configuration with minimum volume) is, L2 m -j_n The minimum width of the grilling device (in the minimum volume configuration) is.

12. Grilling device according to claim 11, comprising a fastening system (17a-17c) for detachably fastening the element side walls of an element to one another in an upright position corresponding to the intended use of the grilling device, forming a corner of the grilling device.

13. Grilling device according to claim 12, wherein the fastening system comprises: a clamp (17a) arranged in the side edge region of one side wall, wherein the clamp is designed and aligned such that a corresponding side edge of the other side wall, by folding into the upright position, acts upon the clamp and can be clamped therein, a pin (17b) projecting upwards from an upper edge of the other side wall, and a tab (17c) projecting downwards from the upper edge of one side wall into the combustion chamber, wherein a gap can be formed between the tab and one side wall, wherein, when the other side edge is clamped into the clamp (17a), the pin (17b) comes to lie in the gap.

14. Grill grate (30) for receiving food to be grilled, wherein the grill grate is designed as a multi-body system and has a variable shape and a nominal usable area which is adjustable between a configuration with minimum usable area and a configuration with maximum usable area and vice versa, wherein the grill grate is formed from four grate elements (31, 32, 33, 34) forming the nominal usable area of ​​the grill grate, wherein the nominal usable area is variable by at least partial overlap of the grate elements, wherein the grate elements each have a first inner edge and a second inner edge arranged perpendicular thereto and each have a first outer edge and a second outer edge arranged perpendicular thereto, wherein the first inner edges of the grate elements are parallel, wherein two adjacent grate elements (31, 34;32, 33) are slidable into one another, so that a first pair of grate elements (31, 34) and a second pair of grate elements (32, 33) are formed, wherein one grate element (31, 33) of each pair of grate elements has a first grate guide (38a) at the first inner edge and the other grate element (34, 32) of each pair of grate elements does not have a grate guide at the first inner edge, wherein the grate elements with first grate guides are not adjacent, wherein the first inner edge of the grate elements without a grate guide is able to be received in the first grate guide of the associated grate element with a first grate guide and is able to be displaced back and forth therein, wherein the grate element (34) without a first grate guide of the first pair of grate elements has a second grate guide (38c) at its second inner edge and the grate element (33) with first grate guide of the second pair of grate elements has its second inner edge without a grate guide in the second; The grate guide (38c) is receptive and can be moved back and forth within it, thereby resulting in exactly one grate element (32) belonging to the second pair of grate elements without a first grate guide and without a second grate guide.

15. Grill grate according to claim 14, wherein the grate element (32) belonging to the second grate element pair (32, 33) is the uppermost grate element without a first grate guide and without a second grate guide (38c) when the grate elements overlap, and the adjacent grate element (31) of the first grate element pair (31, 34) is the lowermost grate element, wherein the uppermost grate element (32) lies on the first grate guide (38a) of the lowermost grate element (31).

16. Grill grate according to claim 15, wherein the grate elements each have parallel bars (37a) with spaces (37b) between adjacent bars, wherein the bars in each grate element are arranged and spaced apart from each other such that the spaces of all grate elements, viewed perpendicular to the nominal usable area, lie on top of each other in the configuration with minimum usable area and the configuration with maximum usable area.

17. Grilling device for grilled food, comprising a grilling device according to one of claims 1 to 13 and a grill grate according to one of claims 14 to 16, wherein the grill grate is located in the outer edge area on the upper side of the combustion chamber side walls of the combustion chamber.

18. Grill according to claim 17, wherein the grill grate is positioned in the outer edge region on the upper side walls of the combustion chamber such that each outer edge region of a grate element rests on an element with longitudinal guide (9a). each grate element has an adjustment guide (39a) and each outer edge area of ​​a grate element that comes to rest on an element with an upper edge without a longitudinal guide (9b) itself has an upper edge without an adjustment guide (39b), wherein each adjustment guide (39a) is designed such that it accommodates an adjacent upper edge without an adjustment guide (39b) and the underlying longitudinal guide (9a) of the corresponding element side wall, such that a user-induced intended change in the volume and / or shape of the combustion chamber causes a corresponding intended change in the usable area of ​​the grill grate by simultaneously pushing the grate elements into one another or pulling them apart.

19. Grilling device according to claim 17 or 18, wherein the second height (h2) of those hinges (22) of the grilling device according to claim 10, which in the inwardly folded state of the combustion chamber side walls are assigned to the lower two combustion chamber side walls or the lowest combustion chamber side wall, is selected such that the grill grate in the inwardly folded state of the combustion chamber side walls can be received in the space between the combustion chamber floor and the lower two combustion chamber side walls or the lowest combustion chamber side wall.

20. Grilling device according to one of claims 17 to 19, further comprising at least one length-adjustable grilling spit, the length of which can be adjusted in the intended operation so that the grilling spit can be placed on any two opposite combustion chamber side walls of the currently used configuration of the combustion chamber.

21. Grilling device according to claim 20, wherein the grilling skewer is dimensioned such that its shortest length lies in a free space between two adjacent grate bars come to lie in the inwardly folded state of the combustion chamber side walls when the grill grate is located in the space between the combustion chamber floor and the folded combustion chamber side walls.

22. Grilling device according to one of claims 17 to 21, wherein a minimum length (L4) and a minimum width (L3) of the grill grate are so much smaller than the minimum length (LI) and the minimum width (L2) of the combustion chamber, respectively, that in a transport configuration in which the total area of ​​the grill grate is smaller than the minimum usable area, the grill grate can be accommodated inside the combustion chamber.

23. Parts set for assembling a grilling device according to one of claims 17 to 22, comprising a first element (1), a second element (2), a third element (3) and a fourth element (4) of the grilling device according to one of claims 1 to 13, a first, a second, a third and a fourth grate element of a grilling grate according to one of claims 14 to 16, and a number of grilling skewers according to claim 20 or 21.

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