Technical field

The invention belongs to the food industry and is related to the equipment for heat treatment of food products. In particular, the invention relates to a highly productive device for cooking meals by heat treatment on open fire or over hot flame, i.e. to a multifunctional barbecue grill for cooking a big number of dishes of one or several types at least in one turn.

The device will be most useful for cooking shish kebab (shashlik), barbecue, grilled meat, fish, vegetables or mixed dishes as well as for heating dishes and/or keeping them warm.

The invention may be used for the organization and catering of mass events, culinary shows, for cooking a large volume of ready and half-ready a la carte dishes for passenger transporters such as sea and air companies, for simultaneous cooking of a large number of dishes for small outlets such as cafeterias, canteens and shops.

Prior art

Grill appliances are mostly used to complete simple tasks, for example, to satisfy the needs of small family picnics, private parties, for cooking individual dishes in restaurants, cafes and outdoor summer restaurants. Grilled dishes are considerably and constantly popular with their fans due to non-trivial cooking process which consumers associate with joy, ease and rest and which arouses positive emotions. Due to this reason the sale of grilled and barbecue products as well as their actual cooking before the eyes of the potential consumers are a desired and attractive part of mass events, celebrations or special occasions to be attended by many people.

Wide use of grill and barbecue devices at such events is hindered by their bulkiness, inconvenient transportation and installation and, first and foremost, low productivity, which inevitably affects the exceedingly high fist cost of the end product. Due to its design, most of the known equipment cannot be adjusted for operation under changing conditions: on sites of different areas and configurations, with a changing list of dishes, under any weather conditions, with an indefinite number of product consumers etc.

A roaster frame consisting of a frame supporting structure which can be folded/unfolded is known from Chinese patent application CN201346146 Y dated November 18, 2009. The frame structure provides for U-shaped support diagonal and connecting rods. In the middle of the frame, there is a tabletop and on the sides there are tables supported by the side supports configured on the frame structure.

The main disadvantages of the said design include its low productivity and the lack of opportunity for quick re-equipment to change the list of dishes, which makes it impossible to use it for mass production.

The prior art also knows application KR 20140114728 A dated September 29, 2014 for a folding barbecue grill that consists of two frame supports holding a main body with a grill net and a heat source (fireplace) inside the inner space of the body. Two additional bodies are arranged parallel to the main body, on both of its sides.

The disadvantage of the said barbecue grill is the impossibility to extend its structure by connection of several devices for simultaneous cooking of a large number of dishes because it has the charcoal tray extruded from the lower body to be filled with charcoal or removing ash. In addition, the fixed side walls of the main body do not allow forming a through space, which deprives the unit of the advantages that can be obtained by such combination.

The known barbecue grill described in international application WO 2014193119 Al dated December 04, 2014 is configured as a folded frame structure with supporting legs of adjustable height. There is a place for product thermal treatment in the center of the structure and supports in the shape of tables on both sides of it. The barbecue grill presented in the publication provides for the use of open fire from a gas cylinder device whose burner is situated in loose filler. The disadvantage of the described device is its unsuitability for industrial use due to its bulkiness, maintenance complexity and limited functionality.

The closest analogue of the technical solution presented is disclosed in the description of the Ukrainian patent for utility model UA 83718 U dated September 25, 2013. The said barbecue grill consists of at least one section, which in turn includes main and additional bodies, a skewer or a spit, skewer holders, a supporting structure configured as a collapsible frame. At the same time, there are cross bars on the supporting parts of the frame for holding the main body and additional bodies. The specified section is made with the possibility of unlimited connection in the longitudinal direction with other similar sections.

The above design allows adjusting device productivity by adding additional sections. All components of the device are made so that they can be quickly assembled / disassembled and their parts can be quickly connected to / separated from the assembled structure. All components of the supporting frame are flat structures or single rod- shaped parts when disassembled so that they can be easily loaded and/or transported and need relatively little space for storage.

The main disadvantages of the said technical solution include structural imperfection of some units, which prevents prompt adjustment of the device to changing places or conditions and list of dishes.

Thus, given the considerable length of a skewer or a spit, the availability of only one additional body does not allow operators to quickly unload the cooked barbecue and to load a new batch of semi-finished products. The impossibility of placing sections of the barbecue grill in parallel to each other and to form a solid stable structure limits the versatility of use of the said technical solution taking into account the spatial parameters of the cooking site. The lack of a lid and/or other protective devices complicates the use of the device outdoors in windy weather.

The barbecue grill according to the closest analogue also has disadvantages associated with the impossibility to select or replace the additional body depending on its size, which is necessary when the list of dishes to be cooked is changed. This disadvantage is caused by the steadiness of the structure that holds the additional body of the support made with respect to its certain size, which can be changed only by metalwork. The supporting structure of the known barbecue grill has obvious disadvantages caused by the impossibility to adjust the height of sections, which is especially important when using the barbecue grill on slopes or uneven sites. As a result, the installation of body sections into the even horizontal channel without additional improvised stands becomes problematic and the use of unspecified supports endangers the safety of the cooking site.

The main task of the present invention is to create a barbecue grill of high versatility, functionality and performance with the possibility to quickly change its design on the operation site and to adjust it for solving the most common technical problems and challenges that arise during preparation and holding of mass events and/or cooking of a large number of dishes.

The invention provides solutions to the tasks set by using the highly productive barbecue grill, suitable for quick and easy structural transformation in accordance with the tasks set and the present conditions while maintaining its high performance, versatility, ease of transportation and maintenance.

Brief description of invention

The presented invention protects the structure of the highly productive barbecue grill designed for the simultaneous preparation of a large number of dishes both of one type and multiple types. The claimed device is convenient to transport and easy to assemble. Its design allows expanding the device in longitudinal and transverse directions to almost any length limited only by the geometric characteristics of the site and staff capability.

The design of the claimed barbecue grill is folding and allows changing the relative positions of constituent elements depending on the conditions and needs of the cooking process. Its parts are made so that they can be mutually replaced and secured using connection elements typical for the entire device. The embodiment of connection elements is simple, safe and secure, which, on the one hand, allows rapidly assembling individual parts into the finished unit, and on the other hand, allows using it safely in the turmoil of mass events. The assembly process of the device from separate parts is subjected to a strict logic that allows the operator to understand quickly the principle of device design and the combination of its individual parts. This not only allows assembling or disassembling the barbecue grill on site quickly without losing time, but also allows new users to learn quickly how to use the device, which greatly facilitates selection of staff for its operation.

Detailed description of the invention

The cross bars of supporting parts of the frame for holding the main and additional bodies are made so that they can be combined with similar cross bars of the supporting parts of the frame of another similar section on any side of the main body. At the same time the said design of supporting parts of the frame allows placing supporting or additional bodies on any side of the main one. Such embodiment of supporting parts of the frame of the device allows assembling the barbecue grill from separate typical sections in the longitudinal and transverse directions simultaneously or only in one of them depending on the need or situation. If the barbecue grill consists of only one section, the cross bars of the supporting structure hold additional bodies on both sides of the main body. When it is necessary to increase the amount of dishes to be cooked, the same section with a main body and two additional bodies is connected to such a single section in the longitudinal direction. When it is difficult to extend the barbecue grill in the longitudinal direction, there is an option to connect several sections parallel to each other. To this end, additional bodies are removed from one side and the free sides of the cross bar are used for connecting the supporting sections in parallel rows. The barbecue grill assembled like this is a structure with at least two main bodies in the center and additional bodies on the sides.

The above concept of "the same section" includes not only arrangement of sections of only one type, but also the joint arrangement of sections of any various shapes of their preferred embodiment disclosed herein, or those matching the presented claims. Another peculiarity of the cross bars is that their design allows changing the width of the supporting place for the additional body and using additional bodies of different widths respectively.

Such versatility of the cross bars is achieved due to the holes for fixing elements used for attaching supporting devices to the cross bars so that the functionality of the entire grill device can be extended. One of such devices is the holding supports for additional bodies and a bridge to connect the sections of the barbecue grill.

Thus, the embodiment of the cross bar proposed according to the invention allows not only adding some parts to the known barbecue grill but provides the device with new technical capabilities, enabling to expand significantly its structural transformation abilities according to the user's needs as well as the functionality and productivity of the barbecue grill on the whole.

The design of supporting parts allows adjusting the height of the structure. This can be done with the help of any methods known in prior art; however, in the preferred embodiment, it is proposed to use adjustable posts given the design of fixing elements for all assemblies of the barbecue grill.

The supporting structure allows changing the relative positions of the sections of the barbecue grill so that the staff can use the available space more rationally taking into account the peculiarities of the site and the volume of orders.

The main body of the barbecue grill is preferably made in the shape of a trough. The shape of the body refers to all reservoirs of any geometric cross-section and volume able to hold the required amount of material that generates heat. The key requirement for the design of the main body specific to the presented technical solution is the connectivity in the longitudinal direction with another body of the same section of the barbecue grill. All edge ends of the main body can be connected end-to-end, by overlapping or with the help of holding plates, forming a through extended space.

In one embodiment, which is preferred due to its practicality, an elongated shape having flat or almost flat bottom with side walls inclined outside is recommended. This embodiment of the main body is suitable for the fuel material to be filled inside and allows hot air flow to be spread inside the body and also rational given the ease of transportation and storage because it allows assembling such bodies into one body. The side walls of the body are used to store kitchen utensils in it, such as spit holders, grill meshes, skewers, shielding plates, which in turn allow placing trays, pans, food boxes and other utensils suitable for cooking or heating in the body.

A notable feature of the claimed barbecue grill is the possibility of arranging additional removable side walls on the main body. The design peculiarity of the side walls is that they can perform a protective function in case of bad weather while the cooking process in the main body with the side walls installed goes uninterrupted and the productivity of the device does not decrease because it does not depend on the transformation of the main body.

According to the invention, the main body is separable from the supporting structure, which allows using main bodies of different shapes adapted to suit the peculiarities of the list of dishes to be prepared for this device.

Perforated shielding plates for covering the main body, which are provided within the equipment set for the barbecue grill, can also prevent the spreading of ash or partially protect the fireplace or the heat source during intermittent precipitation. Except for the protective function, shielding plates can be used to prepare additional or accompanying grilled dishes such as khachapuri as well as for heating and maintaining the temperature of cooked dishes within acceptable limits.

If there is a need to prepare a certain type of dish or to increase its quantity, the body will be equipped with auxiliary accessories typical for such case, for instance, holders for holding the spit or grill grates or lids for the main body. Characteristic of the proposed technical solution is that additional sections, which are also equipped with the necessary auxiliary accessories, are added to the barbecue grill in the longitudinal and/or transverse directions.

Additional bodies with which the barbecue grill is equipped should have a shape suitable for servicing the main body and ensure their main purpose, in particular, be suitable for additional operations of the main cooking process. Typically, one of the additional bodies is used, for example, for stringing or holding the waiting product. The additional bodies may have different design with regard to their shape and volume if it ensures the full functionality and possibility of arrangement on one supporting structure with the main body. They are preferably shaped similarly to the preferred shape of the main body to make assembling, transportation etc. easier.

The parallel arrangement of additional bodies on either side of the main body or bodies is the optimal alternative because it provides convenience and high performance of the barbecue grill as well as improving observance of the necessary sanitary regulations by eliminating contact between raw and cooked products. In contrast to the closest prior art, there is no need in the proposed technical solution to keep the supporting body empty awaiting for the cooked dishes to be unloaded on it because they can be unloaded onto an additional supporting body specially configured for this purpose and the first body can be used immediately to prepare new dishes. Thus, a kind of conveyor, which is very productive, is organized.

In the preferred case, which is going to contribute to an even higher effectiveness of the use of the barbecue grill, using supporting accessories is proposed. These include spits, needles, forceps, and hooks for spit removal and hanging utensils, trays for sauces, a set of pokers, and holders for various purposes.

Therefore, the claimed invention has the following technical result:

- the creation of a barbecue grill with new technical features that make it possible to significantly expand options for structural transformation of the device, to increase the functionality and efficiency of the barbecue grill on the whole;

- the possibility to respond quickly to changing weather and organizational conditions of cooking;

- the possibility of virtually unlimited extension and expansion of the barbecue grill;

- speed and ease of the installation of its separate units and the device in general, the simplicity of structural connections, the reliability of their fixation;

- the possibility to adjust the height of the barbecue grill and its sections separately; - the possibility to heat dishes or to keep them warm without the need to re- string them or use other accessories;

- the possibility to compactly lay individual parts of the barbecue grill for storage and transportation;

- convenience and high effectiveness of the barbecue grill, observance of sanitary regulations;

- acceleration of the process of cooking large quantities of foods in terms of both types and volume, ensuring a high performance of the barbecue grill;

- the possibility to cook additional dishes on the grill, as well as heat cooked dishes and maintain their temperature within acceptable limits.

- rational use of the space occupied;

- an opportunity to protect the inner space of the main body from bad weather;

- a reduction of the number of service staff per unit of cooked products;

- ensuring comfortable and reliable holding of various products on a spit;

- the possibility to install the barbecue grill compactly on a site of limited length without any performance loss during cooking;

- the possibility to simplify the stacking of bodies forming dense packaging that holds tight during transportation, after which the bodies can be easily and quickly removed from the stack.

The following figures and their explanations provide an even more detailed disclosure of the invention.

Description of figures

Fig. 1 - general view of the assembled barbecue grill and its main components. Fig. 2 - embodiments of the supporting part of the frame:

2a - the supporting part of the barbecue grill (serial splicing is possible);

2b - the supporting part of the barbecue grill (parallel splicing is possible);

2c - the post of the supporting part of the barbecue grill with an enlarged image of the cup nut and an internal thread telescopic supporting element; 2d - an enlarged image of the supporting post with an internal telescopic supporting element.

Fig. 3 - an example of cross-connection of the supporting parts of the frame for two sections of the barbecue grill.

Fig. 4 - a support for holding the additional body.

Fig. 5 - a hook for fixing accessories on the barbecue grill.

Fig. 6 - a view of a fragment of the barbecue grill with perforated shielding plates.

Fig. 7 - the side cover for the main body.

Fig. 8 - embodiments of reinforced U-shaped holders for (a) spit(s) and/or (a) skewer(s) and a fixing pin.

8a - a general view of the U-shaped holder for spits and/or skewers;

8b - a general view of the U-shaped holder for spits and/or skewers with Y- shaped holders;

8c - the fixing pin of the U-shaped holder.

Fig. 9 - a general view of the main body with an enlarged image A of an embodiment of the U-shaped holder for the spit and the bearing planes on auxiliary side shields and on the main body.

Fig. 10 - a view of the reinforcing cage for holders for (a) spit(s) and/or (a) skewer(s).

Fig. 11 - a view of a fragment of the barbecue grill with holders for (a) spit(s) and/or (a) skewer(s) with a spit and a bent half-cylinder lid.

Fig. 12 - a view of a fragment of the barbecue grill with a gas pipeline.

Fig. 13 - lower and upper bridges for heating bodies with food products.

Fig. 14 - the assembled main body with bridges for heating and additional bodies being heated.

Detailed description of figures

Fig. 1 shows a general view of a typical section of the barbecue grill according to the claimed invention. The supporting structure, which consists of a folding frame, is shown in the figure. The section frame consists of at least two supporting parts (1) preferably made of cross-connected bars. Solid or hollow bars of unlimited shape, but hollow square bars are preferred, are used for making the frame. The supporting parts (1) of the frame are equipped with posts (2) oriented downwards to adjust the working height for the barbecue grill. The variants of the frame supporting parts (1) with posts (2) of different embodiments are shown in Fig. 2a, 2b (these variants differ in that they ensure different working heights of the barbecue grill). Fig. 2c and 2d show the preferred embodiment of the height adjustment of the frame supporting parts (1) using supporting posts (2). They contain: horizontal through holes (14); an internal telescopic supporting element (13) that has the same cross-section as the frame supporting parts, with horizontal through holes and a bottom cup nut (16) with internal thread where the internal thread telescopic supporting element (15) is fixed. Horizontal through holes (14) are used for rough height- adjustment of the barbecue grill section, whereas the thread supporting element (15) helps to ensure the exact position necessary for it.

When the frame is being assembled, the frame supporting parts (1) are connected with a spacer (27) inserted into slots (25, 26) (see Fig. 6).

The frame supporting part (1) contains a cross bar (3) for holding the main body (10) and additional body (bodies) (7) and a bridge (17) (see Fig. 3) for parallel (cross) connection of the barbecue grill sections which is fixed to the cross bars (3) of the frame supporting parts (1) using holes (18, 19) appropriately made in these parts (see Fig. 6) and fixing pins.

The side walls of the main body (10) have holes (9) where holders (29) (see Fig. 8a, 8b) for spits (43) (see Fig. 11), additional side shields (5) and other accessories are placed.

Holes (18, 19) on the bridge (17) (see. Fig. 3) and the cross bar (3) allow creating the necessary distance between the frame supporting parts (1). The bridge (17) (see. Fig. 3) can also be used to extend the cross bar (3) of the frame supporting part (1) for mounting accessories. The main body (10) is fixed on the holding plate (12) (see. Fig. 2a, 2b) rigidly mounted on the cross bar (3). The plate (12) is configured as a guide that simplifies and accelerates the process of joining additional bodies (7). At the same time, it prevents ash and coal from spilling into the space between the bodies. With the frame supporting part (1) equipped with supports (11) and plates (12) (see. Fig. 2a, 2b), the entire assembled structure becomes more solid, and the consequences of a possible slight shift of the barbecue grill sections that often occurs during intensive use will not be so critical. The holding plate (12) also allows compensating the thermal extension of the main bodies (10), which is especially noticeable on elongated structures. According to the solid-fuel embodiment of the barbecue grill section, the bottom of the main body can be equipped with cast iron fire grates (6) with supports. Such a design ensures better draft for ignition and subsequent smouldering of firewood or charcoal. When fuel burns out, the ash falls down through cutouts in the cast iron fire grate (6) onto the bottom of the main body (10), thus improving air access to the remaining fuel required for further combustion or smouldering and reducing the risk of fire flakes spreading and pollution of dishes with them.

Additional bodies (7) are fixed by means of adjustable supports (11) (see. Fig. 4) fixed on the cross bar (3). The availability of appropriate mounting holes (23) in the supports (11) for additional bodies, holes (19) on the cross bar (3) and holes (18) in the bridge (17) allows adjusting a distance convenient for the cooking process between the main body (10) and the additional body (7). The fixation of the support (11) is made according to the standard model for the whole structure for the barbecue grill section by inserting one bar into another. A support (11) for additional bodies allows adjusting their seats depending on the width of the additional body (7) or for simultaneous placing of several additional bodies on it. Such adjustment is implemented with the help of one of the holding parts (20) which is configured to be movable and able to be fixed in the series of holes (22) using projections (21) arranged in the bottom of the holding part (20). In addition, the support (11) includes a mounting seat for the hook (46) for fixing accessories. Fig. 5 shows the hook (46) which is fixed on the supporting part (11) in the mounting seat (4) and designed to secure accessories such as, for example, a skewer, a poker, a needle, tweezers, a hook to remove the spits or kitchen utensils etc. The hook's embodiment is not limited to a specific form or manner of fixing; the main requirement is that it should perform its direct functions. Such an improvement will eradicate the need to keep a dedicated stand or hanger for small accessories or utensils in the cooking area. If needed, the necessary accessories will be always in sight and readily available, which will greatly facilitate the work of the service staff and allow maintaining order on the site.

Fig. 6 shows a general view of a partially assembled section of the barbecue grill with perforated shielding plates (24) to be placed on the main body (10) which can perform a protective function and be used for cooking dishes (with or without the proper utensils). The shielding plate (24) is perforated because it is necessary to maintain the process of burning or smoldering in the working volume of the main body (10). In addition, such perforation accelerates the process of cooking the dishes prepared using the shielding plate (24).

Fig. 7 shows an enlarged image of the side cover (8) for the main body. The angle of the end walls of the body is chosen similarly to the angle of side walls of the main body. The side cover (8) may be useful, for example, when the barbecue grill is used in the embodiment of a single section where the side covers prevent coal from spilling so that a layer of warmth of the desired thickness may be formed. The side cover (8) is required for ensuring the security and convenient use of the main body in case of windy weather.

Fig. 8 shows the embodiment for a holder (29) for the spit (Fig. 8a, 8b) and a fixing pin (34) (Fig. 8c) for fastening the holder at the desired height over heat or flame. The holder (29) is made as a U-shaped bracket with bends (30) that secure the spit (43) (see Fig. 11) from shifting over the surface of the holder. On the parts of the U-shaped bracket designed for insertion into the holes (9) of the main body (10) (see. Fig. 1) or into the holes (40) of additional side shields (5) (see. Fig. 9), there are rows of symmetrical holes (31) for fixing the holder with the fixing pin (34) at the chosen level. The fixing pin (34) is a rod bent at the right angle (or one close to it) with a grip ring (35) at one end for convenience. Such a design facilitates quick and convenient holder height regulation and further assembly /disassembly. The number of bends (30) for the spit (43) in the holder (29) can be from 1 to 10, but preferably from 1 to 5, the most efficient being holders for 1-3 spits. Preferably, holders are inserted into holes (9, 40) on the bearing surfaces (36, 38) of the additional side shield (5) or the main body (10), respectively (see. Fig. 9), but they can be configured as laying freely on the main body (10).

The holder (29) can be made both in a lightweight embodiment, for example, as shown in Fig. 9, and in a reinforced embodiment designed to withstand the increased load and hold two or more tiers of a greater quantity of products. Its difference from the lightweight embodiment of the holder consists in the availability of a stiffening element (32) that prevents the holding part from bending. The stiffening element (32) is fixed under the bends of U-shaped bracket that hold spits. Such a holder allows equipping it additionally with Y-shaped holders (33) which may have any shape suitable to perform their function and can be connected to the main part of bracket that holds the spits in places among its bends in any suitable way. All the additional Y-shaped holders (33) may be of the same or different heights depending on the objectives and tasks of the cooking process.

Fig. 9 shows the preferred embodiment of the body (10), made with bearing surfaces (38) and equipped with additional side shields (5) and spit holders (29) placed on them. Enlarged image A shows the configuration of the assembled structure. Additional side shields (5) are mounted on the main body with the help of holes (9, 37) and fixing elements inserted into them or thread connection. Additional side shields (5), just like the side walls of the main body (10), are designed to hold accessories and at the same time to create additional protection from unwanted influence of weather conditions, particularly from heat being blown away with strong wind from the main body and in case of slight rain or mist, when the sides mounted with an inclination inside the body form a kind of canopy, reducing the open area sensitive to moisture ingress. Inclinations of additional side shields (5) are made so as to leave an opportunity to continue the cooking process through the space formed between the edges of these sides. Similarly to the embodiment of the side walls of the main body (10) with bearing surfaces (38), the edges of the additional side shields (5) oriented downwards can be bent as well with bearing planes (39), where there may also be holes (37) to insert fixing elements for connection with the main body (10). The edges of additional side shields (5) oriented upwards can also be bent to form bearing planes (36), which gives more freedom to use accessories. These bearing planes can also have holes (40), which allow fixing holders (29) for the spit (43).

In case of high loads on a spit holder, it is useful to equip the holes of the main body (10) with reinforcing cages (41) as shown in Fig. 10. Such a design will contribute to safer fixation of the loaded holder in the holes that allows distributing the load on the tray better, increasing its life and personnel safety during the operation of the barbecue grill.

Fig. 11 shows the preferred embodiment of an accessory, namely: the lid (42) in the shape of a half-cylinder which can be opened from both sides. The said lid is mounted instead of additional side shields (5) and protects the heat and dishes from changing weather conditions. The lid (42) can also be used to slow the burnout of the smoldering charcoal or to preserve the temperature inside the space formed between the main body (10) and the lid (42).

The term 'spit' (43) within this invention refers to any assembled spit with grills as shown in Fig. 11 or a spit which consists of two detachably interconnected longitudinal metal rods with the cross-section in the shape of a hollow or solid circle, or a square, or a triangle, or a polygon, or a concave polygon or a spit in the shape of a solid rod.

The proposed barbecue grill can operate both on solid fuels and on gas fuel. The embodiment of such a variant is shown in Fig. 12. A necessary and sufficient element of this section are gas burners configured as pipelines (44) with holes or in another configuration known from the prior art and suitable for this design. Gas pipelines (44) are configured so that they can be connected to a similar section of the barbecue grill in the longitudinal or transverse directions or plugged. The gas barbecue grill embodiment also provides for other elements of gas equipment defined by specifications and the need to comply with safety procedures. An additional grille (45) for holding lava stones, contributing to uniform distribution of heat from gas burners, can be installed above the gas pipeline.

Fig. 11 and Fig. 12 show the embodiment of the supporting parts (1) of the frame in which the main bodies (10) of consecutively arranged sections are placed on one shared supporting part (1) of the frame in the place of their junction. Such embodiment allows reducing the consumption of materials, transportation costs etc. for the barbecue grill without reducing its durability.

Fig. 13 shows bridges (47, 48) for holding additional bodies on the main body with a view to heating or keeping foods warm in additional bodies. The lower bridge

(47) is made with in view of the dimensions of the main body and has two projections directed downwards near the sides that protect the bridge from slipping, and at least one central projection to ensure uniform distribution of load on the main body and to prevent deflection of the bridge. The lower bridge (47) also has projections protruded upward and made of hollow section for the relevant projections of the upper bridge

(48) to be inserted into them. The said projections also serve to prevent the fall of additional bodies from bridges in case of accidental shocks.

Fig. 14 shows an example of the embodiment of the assembled structure, where a side view shows the main body (10), bridges (47, 48) and additional bodies (7) located above the main body for heating or keeping foods warm. The proposed embodiment can be assembled after the removal of accessories from the main grill (10) and is possible in case of sections for both solid fuel and gas if the structure of the gas pipeline (44) does not hinder the installation of bridges and compliance with safety requirements.

An example of a specific embodiment

The barbecue grill is assembled and operated as follows. To assemble the disassembled barbecue grill, one must install the supporting parts (1) and connect them using spacers (27) on which main bodies (10) are installed consecutively, end- to-end or overlapping each other. Then spit holders (29) are inserted into holes (9) on the main body (10). The supports for additional bodies (11) of the necessary length are arranged on the cross bars (3) of supporting parts (1). Additional bodies (7) for raw and cooked products are installed on supports (11) assigned to them, and the main body (10) is installed on the cross bar (3) or on the guiding holding plate (12). In case of the barbecue grill with solid fuel heating cast iron fire grates (6) are installed in the main body (10) and fuel material is filled into it; in particular, it can be wood, fuel briquettes etc., but most preferably charcoal. A spit (43) or its parts, for example, with raw barbecue are put into the body (7). Separate parts of the spit (43) are connected to each other by means of end screw connections. The assembled spit (43) is installed onto holders (29) after the charcoal is set alight. If the barbecue grill operates with gas heating, lava stones are filled inside after the installation of the gas equipment and the grille (45) and gas starts to move through the gas pipeline, setting fire burners afire. During roasting, the spit (43) is turned around the longitudinal axis using a handle at one or both ends of the spit. There is also an option to rotate it using (an) electric drive(s). During combustion, the heat released provides even thermal processing and roasting of the product while the spit (43) rotates.

After roasting, the spit (43) with the prepared barbecue is placed onto one of additional bodies (7) from the main body (10) and if necessary, can be disassembled into separate parts to ensure the comfort of its transportation from the barbecue grill to the consumers. If necessary, additional charcoal is filled into the main body (43) with solid fuel heating and another spit (43) with the raw product to be roasted can be installed. The next portion of raw barbecue is put into the vacant additional body (7) for raw products.

If it is necessary to increase productivity of the barbecue grill or cook additional dishes, an additional section is connected to the section operating taking into account the possibility of further extension. In case of longitudinal extension, the fully assembled section is connected to the section operating end-to-end; they are connected with a bracket, bolt or pin inserted into holes in projections (49, 50) on parts (3, 11). If the area is not sufficient in the longitudinal direction, the extension is made in the transverse direction. Another assembled frame structure with supports (11) for additional bodies attached on one side is added symmetrically to the section operating, and the additional body that is now in the center of the structure is moved to the side and laid on vacant supports (11). Vacant supports for additional bodies are dismounted, and the free ends of the cross bars of the additional section and the released ends of the cross bars of the section operating are connected using the method provided for this case, for example, using a bridge (17) and fixed; then they are installed on the second frame structure. One can increase the productivity of the barbecue grill without interrupting the cooking process.

If the weather changes, particularly in case of strong wind rising, additional side shields (5) are installed and fixed on the supporting planes (38) of the main body (10); for example, if there is a spit or multiple spits placed on the main body, they are unloaded on the additional body or lifted above the edges of additional side shields (5) to install the holders (29) to which the spit/spits (43) is/are returned in the end. If the situation requires greater protection of the main body, a semi-cylindrical lid (42) can be mounted on it alternatively. The cooking process can last until the product is cooked.

The device is disassembled in reverse order.