ITVR970039A1 - INFORNATORE-SFORNATORE TROLLEY, IN PARTICULAR FOR BREADS. - Google Patents

Description

DESCRIPTION

attached to a patent application for INDUSTRIAL INVENTION entitled:

BURNER-BAKER TROLLEY, ESPECIALLY FOR BREADS.

The present invention relates to a baking-oven trolley, in particular for breads.

The trolley in question is intended to be used in the production cycle of bread and any other product to be baked in the oven (for example pastry products) to stow frames or pans carrying the loaves of dough, on a plurality of levels. parallel to each other. The trolley according to the object is also suitable for carrying out the transfer of the pans and frames onto corresponding cooking surfaces located in ovens, in particular for bread making, as well as for carrying out the removal of the loaves once cooking in the oven is completed.

The present invention makes it possible, in particular, to reinsert (disengage) the frames and pans simultaneously in (from) the oven.

For the sake of simplicity, reference will be made hereinafter to the use of the trolley only for breads, however it is intended to be used for any food product to be cooked in the oven.

Currently, in accordance with the known art, the trolleys adopted to support, bake and take out the loaves in ovens equipped with cooking hobs are generally or excessively simple, such as not to allow a rapid and complete performance of all the useful functions required or need. execution of rather laborious operating sequences and such as not always to guarantee a satisfactory practicality of use.

The known trolley of a more traditional type consists of a series of parallel loading surfaces obtained on a frame equipped with wheels and does not provide for any automatic or manual mechanism for transferring the frames and pans onto the oven floors. Likewise, it does not have any system for removing the loaves and pans from the oven when cooked. Both refilling and unloading are therefore carried out completely manually. It therefore performs only the function of storing the pans and frames and of transporting them near the oven. This trolley obviously has numerous limitations from an operational and functional point of view.

It requires a huge expenditure of energy to manually move the pans and the frames from the trolley to the oven and vice versa to take the pans out of the oven and collect the breads deposited by means of the frames directly on the cooking surfaces of the oven.

In order to speed up the loading and unloading process, making the transfer operations of frames and pans substantially more practical and automatic, two other types of trolleys have more recently become widespread. A first known type of trolley is suitable for transporting pans only and provides for the use of a structurally fairly simple trolley, of the type mentioned above, provided only with small mechanical devices which allow it, once inserted in the oven, to release the pans to the cooking surfaces being the latter movable vertically, in other words the trolley is inserted into the oven by arranging each loading surface above a corresponding cooking surface. Subsequently, the hobs are raised, taking delivery of the pans and thus allowing the unloaded trolley to be extracted. Similarly, the pans are taken out of the oven by lowering the cooking surfaces of the oven with the consequent delivery of the pans to the loading surfaces of the trolley.

The main disadvantage of this system lies in the impossibility of using the frames which, as known, place the loaves directly on the cooking surfaces of the oven during their extraction from the oven. More specifically, the frames deposit the loaves as they come out of the oven, unwinding a mat loaded with loaves and wound into a ring on two rollers placed at their two final ends.

Also this system is therefore characterized by scarce practicality and limited versatility.

It should also be noted that the system just described for putting the pans in and out of the oven requires an elevator device inside the oven which on the one hand limits the use of the aforementioned trolleys only to this type of oven and on the other hand can represent an excessive cost as well as a technological complication of dubious convenience.

A second known type of trolley is suitable for transporting frames only and therefore it too badly adapts to the needs of versatility of use that are often required in the bread production cycle, especially by small producers.

This trolley is structurally rather complex and requires little practical coupling and uncoupling mechanisms for the frames. Basically, the use of this trolley provides for the loading of its shelves with the frames, the front approach to the oven of the trolley (which therefore remains outside the furnace), and the guided insertion of the frames inside the oven by means of the operation of a manual lever designed to slide the frames on the cooking surfaces of the oven until they are completely inserted. Subsequently, by extracting the trolley, the frames are unwound and the loaves are deposited on the cooking surfaces of the oven.

In turn, the removal of the oven involves the sliding of a plurality of blades on the cooking surfaces of the oven by operating the aforementioned manual lever mounted on the trolley. During the unloading operation as during the infomation operation, the trolley always remains outside the oven, the loaves collected on the blades are then extracted from! oven by returning the blades themselves above the trolley once again by operating the aforementioned manual lever. The main drawbacks of this trolley are therefore: low versatility of use (it works only with frames); excessive complexity of the required mechanisms; little practicality of the operations to be carried out for the correct infomation and removal of the loaves.

Finally, it should be noted that bread producers often feel the need to load the oven partly with loaves placed in pans and partly with loaves placed directly on the cooking surfaces through the use of frames. This is necessary in order to meet the specific different cooking needs of the different types of bread and, however, it cannot be achieved with any of the aforementioned known type trolleys.

The essential purpose of the present invention is therefore to obviate the advantages shown by known type trolleys, by providing a new trolley which allows any type of bread to be baked and taken out of the oven, using pans or frames simultaneously and without distinction through a quick and simple sequence of operations.

A further object of the present invention is to provide a trolley which is constructively simple and operationally completely reliable which requires little maintenance and which is relatively small in size.

These purposes and others besides, are all achieved by the infomator-furnace trolley in question which substantially comprises a plurality of loading surfaces to indistinctly support information pans, unloading frames or shovels for unloading the loaves and manually operated actuator means. suitable for connecting the frames and shovels to the trolley, as well as for retaining the pans selectively integral with the loading surfaces of the trolley or with the corresponding cooking surfaces of the oven. In accordance with a further characteristic of the invention, the manually operated actuator means provide a locking member which can be moved by means of a manual actuator between a free position and a stop position, and a holding mechanism adapted to stop the pans on the corresponding cooking hobs. of the oven and able to stop the pans on the loading surfaces of the trolley.

The technical characteristics of the invention, according to the aforementioned purposes, are clearly verifiable from the content of the claims reported below and the advantages thereof will be more evident in the detailed description that follows, made with reference to the attached drawings, which represent a purely exemplary embodiment. and not limiting in which:

Figure 1 shows a schematic view of the trolley according to the present invention;

Figures 2-6 show side schematic views of some details of the carriage of Fig. 1 in different operating conditions and with various parts removed to better highlight others;

Figure 7 shows a schematic front view of a detail of trolley of fig. 1 since various parts have been removed to better highlight others;

Figures 8-15 show side schematic views of the trolley and of a bakery oven in different operating phases of the baking and unpacking process, various parts having been removed to better highlight others;

fig. 16 shows the carriage of fig. 1 associated with a collector trolley. In accordance with the figures of the attached drawings, the number 1 in its entirety indicates the infomator-oven trolley object of the present invention.

It substantially comprises (see Fig. 1) a plurality of support profiles 2 arranged on the two sides of the trolley 1 so as to provide a plurality of loading surfaces 3 to indistinctly support the pans 4 for loading the unloading frames 5 or the paddles 6 for removing the loaves, as well as manually operated actuator means adapted to connect the frames 5 and the blades 6 to the trolley, and adapted to retain the pans 4 selectively integral with the loading surfaces 3 of the trolley or with corresponding cooking hobs 8 of the oven 9.

The loading surfaces 3 are parallel to each other and mutually spaced along the height of the trolley 1. Each loading surface 3 of the trolley 1 is operationally associated with a corresponding cooking surface 8 obtained on a similar structure with parallel shelves arranged inside a cooking chamber of a bakery oven 9. When the trolley 1 is inserted inside this chamber, each loading surface 3 is arranged above a corresponding cooking surface 8 of the oven 9.

The trolley 1 has a rear pushing zone 10 equipped with a handling handle 11 and a front information zone 12 through which it is possible to access its loading surfaces 3.

The heart of the invention lies above all in the versatility of use of the churning-furnace trolley 1 in question which in fact can be used indifferently to support pans 4, frames 5 or shovels 6 and which allows simultaneous baking on different loading levels 3 of pans. 4 and frames 5, as well as allowing the simultaneous unloading of pans 4 or loaves 7 placed directly on the hobs 8 of the oven 9.

Both the infomation phase and the unloading phase obviously require a double movement of the trolley 1, that is to say from an external position 13 to an internal position 14 in the oven 9 and from an internal position 14 to an external position 13 in the oven 9.

As will be explained in more detail below, the trolley 1 is capable of carrying out, by means of the aforementioned movement between the external 13 and internal 14 positions of the oven 9, the following operations respectively: - unloading the loaves 7 from the frames 5 onto the cooking hobs 8; - loading the loaves 7 from the cooking hobs 8 onto the blades 6; - unloading the pans 4 from the loading surfaces 3 onto the cooking surfaces 8; - loading the pans 4 from the cooking surfaces 8 onto the loading surfaces 3.

The actuator means 40 responsible for carrying out the aforementioned operations are in turn constituted (see Figs. 2-5) by a locking member 15 rigidly connected to first coupling elements 16 mounted along its height in correspondence with each loading surface. 3, and by a retaining mechanism 17 adapted to stop the pans 4 on the hobs 8 of the oven 9 during the baking phase of the loaves 7, and to allow the pans 4 to be taken over by the support profiles 2 of the trolley 1 during the baking phase of the loaves 7.

More in detail, the locking member 15 consists of a first frame 18 mounted in the rear thrust zone 10 of the carriage, which can be moved by means of a manual actuator 19 <'> between a free position 20 (see Fig. 2), in correspondence with the which is possible to insert the frames 5 or the blades 6 on the loading surfaces 3, and a stop position 21, in correspondence with which the frames 5 and the blades 6 are anchored to the trolley 1.

The first coupling elements 16 have a free end capable of being inserted during the coupling phase and to disengage during the unhooking phase respectively in and from a corresponding first seat 22 obtained on each frame 5 and on each pair 6. In practice, the frames 5 and the blades 6 are inserted on the loading surfaces 3 of the trolley I until they abut against the first frame 18 so that by activating the manual actuator 19 it is possible to move the first frame 18 from the free position 20 to the stop position 21, determining the insertion of the hooking elements 16 in the first seats 22 of the frames 5. These seats 22 can advantageously consist of the space provided for the support handles of the frames 5 and of the blades 6.

In the case of the example illustrated in the attached figures, the first frame 18 is obtained simply by means of a first bar mounted vertically in the rear area 10 of the trolley in a central position, which can be moved vertically in a guided manner between the aforementioned positions (free and stop) by means of of the manual actuator 19 consisting of a lever carrying an eccentric connected to the first bar 18 itself.

It should be noted that the first coupling elements 16 are mounted in front of the first bar 18 (with respect to the direction of advancement of the carriage) and have their free ends facing downwards. Obviously they are mutually spaced apart by the same distance between the cooking surfaces 8 of the oven 9.

In turn, the retaining mechanism 17 consists of a second frame 23 represented, in the case of the example illustrated, by a second bar mounted vertically in a central position in the rear area 10 of the trolley and extending along its height along all those planes of loading 3 on which the pans 4 have been inserted. The latter are inserted on the loading surfaces 3 until they abut against the front side of the second bar 23.

On the second bar 23 there are one or more second hooking elements 25 (see Figs. 3-5) capable of engaging on corresponding support elements 26 mounted cantilevered on the first bar 18.

Mounted in a substantially central position on one or more cooking hobs 8 of the oven 9 is a first guide element 27 having a ramp 28 facing towards the opening of the oven 9 and equipped with a second seat 29 located at the upper end of the ramp 28 itself.

The ramp profile 28 of the first inlet element 27 (see fig. 3) is designed to guide up to the second seat 29 a third coupling element 30 obtained on the second bar 23 during the insertion of the trolley 1 in the oven 9.

As can be seen in fig. 3, the second bar 23 is equipped with shaped holes whose upper profile forms the third coupling element 30 engaging them on the aforementioned second seats 29.

When the trolley I is inserted into the oven 9 by sliding the third coupling element 30 on the ramp profile 28 of the first infeed element 27 until reaching the second seat 29 (see Figs. 4), transport is also determined at the same time. of the second frame 23 from a lowered position 31 to a raised position 32, and correspondingly the second coupling element 25 disengages from the support element 26. In this way, when the carriage 1 is moved from the internal position 14 to the external position 13 to the oven 9, the second frame 23 and all the pans 4 which were in abutment against it remain held inside the oven 9.

By operating the manual actuator 19, a third intermediate position 33 (see Fig. 5) of the first bar 18 is provided. In correspondence with this latter position, the first bar 18 supports the second bar 23 in such a way that the the third coupling element 30 is free from the second seat 29 and the second coupling element 25 is engaged on the support element 26. With this it is possible to extract the second frame 23 and all the pans 4 from the oven 9. support it. In fact, when the trolley is inserted into the oven 9 the support profiles 2 take delivery of the pans 4, and once the third coupling element 30 has been released from the third seat by moving the first bar 18 in an intermediate position 33, it is possible removing the pans 4 from the oven 9.

The frames 5 consist of bread-carrying mats wrapped in a ring on two rollers mounted at their front and rear ends (see fig. 2).

Each mat has two protruding elements 34 laterally capable of being inserted into two respective third seats (see fig. 3) obtained on corresponding second guide elements 36 mounted laterally on the hobs 8 of the oven 9.

Therefore, during the firing phase, when the trolley 1 is inserted into the oven 9, the protruding elements 34 engage on the third seats 35 allowing the frames 5 to unroll during the subsequent extraction of the trolley, thus placing the loaves 7 on the shelves. cooking 8 of the oven 9.

During the unloading phase, the blades 6 are inserted on the loading surfaces 3 of the trolley in correspondence with those cooking surfaces 8 of the oven 9 on which the loaves 7 are placed.

The loaves 7 are then loaded through the introduction of the trolley into the oven 9 and subsequently extracted together with the trolley by moving the latter from the internal position 14 to the external position! 3 to the oven 9.

It should be noted that when the locking member 15 is arranged in the intermediate position 33, the first coupling elements 16 remain engaged on the first seats 22 and retain the blades 6 anchored to the carriage 1. In this way it is therefore possible, during the unloading phase , carry out the simultaneous extraction of the pans 4 and the loaves 7 from the oven 9.

Advantageously, the support profiles 2 are provided with at least one sliding bearing 39 capable of slidingly supporting the pans 4, the blades 6 and the frames 5.

The trolley I can also be operationally associated with a collecting trolley 41 equipped with wheels, which can be loaded with a plurality of baskets 42 that can be surmounted one on top of the other. The latter can be positioned near the front area 12 of the furnace-oven trolley when the latter has the paddles 6 filled with loaves 7 inserted on its loading surfaces 3. Each basket 42 when placed on the loading trolley 41 can receive the loaves by at least one blade 6 (see fig. 16). The collecting trolley 41 mounts at the bottom a fixed basket 43, integral with it, able to collect the loaves from the blades located lower on the furnace-exhauster trolley.

As can be seen in fig. 7 the trolley in question is equipped with a push pedal 45 arranged below in the rear area 10. It can be operated by means of a foot and is able to abut against a fixed base 46 of the oven to facilitate the extraction of the trolley 1 from the oven itself during the movement of the trolley from the internal position 14 to the external position 13.

Functionally, with reference to the attached figures 8-15, the firing and unloading process which can be carried out with the trolley 1 in question can consist for example of the operating steps listed below.

Initially, the trolley 1 is loaded with frames 5 and pans 4 respectively on a first series and on a second series of loading surfaces 3 of the trolley 1 (see Fig. 8). The first bar 18 is in the stop position 21 to hold the frames 5 on the carriage I.

The trolley 1 is then inserted into the oven 9 (see fig. 9) and the second bar 23 slides over the first guide element 27 until it locks onto the second seat 29. At the same time the protruding elements 34 of the frames 5 are inserted into the third seats 35 of the second guide elements 36 and the second bar 23 is released from the first bar 18 to which it was hung by means of the second hooking element 25.

At this point, by extracting the trolley 1, the frames 5 unroll and place the loaves 7 on the first series of cooking surfaces 8 of the oven 9 while the pans 4 are deposited on the second series of cooking surfaces 8 to which the second bar 23 remains connected. (see fig. 10).

At this stage, for example, it is reasonable to assume that the loaves 7 placed in the pans 4 have a faster cooking and therefore must be removed first from the oven 9. Therefore, if you want to extract only the pans 4, insert the trolley 1 into the oven 9 (after obviously removed the frames 5, see fig. 11), and the first bar 18 is moved to the intermediate position 33 by means of the manual actuator 19 so that the third coupling element is free from the second seat 29 and the second coupling element 25 is engaged on the support element 26 (see fig. 12).

By subsequently extracting the trolley 1, all the pans 4 placed on the second series of loading surfaces 3 are transported out of the oven 9 (see fig. 13). Once the loaves 7 previously deposited by the frames 5 have also been cooked, the trolley 1 (see fig. 14) is inserted into the oven 9 loaded with the blades 6 on the first series of shelves and the loaves 7 are extracted (see . fig. 15).

Obviously, if all the loaves 7 are cooked at the same time, the trolley 1 is inserted into the oven 9 loaded with the blades 6 on the first series of shelves and after having moved the first bar 18 in the intermediate position 33, the trolley 1 loaded with pans 4 is extracted and blades 6 full of blocks 7. This is possible since when the first bar 18 is in an intermediate position 33 the blades 6 are kept anchored to the carriage 1 by means of the first coupling elements 16 (similarly to the case of the stop position 21 of the first bar 18).

The invention thus conceived therefore achieves the intended aim and objects.

Obviously, in its practical embodiment, it can also assume forms and configurations different from the one illustrated above without thereby departing from the present scope of protection. Furthermore, all the details may be replaced by technically equivalent elements and the shapes, dimensions and materials used may be any according to requirements.

Claims (19)

CLAIMS 1. Baking-churning trolley, in particular for loaves, of the type equipped with wheels and equipped with a plurality of support profiles (2) arranged on the two sides of the trolley (1) and mutually spaced along its height, thereby creating a plurality of parallel loading surfaces (3) which can be associated with a corresponding plurality of cooking surfaces 8 arranged inside a bakery oven (9), said trolley (1) having a rear thrust zone (10) and a front zone (12) through which it is possible to access said loading surfaces (3) of the trolley (1), characterized by the fact that each said loading surface is able to indistinctly support a baking pan, an unloading frame or a shovel for unloading said breads (7), said trolley (1) being movable between an external position (13) of the oven (9), in which it is possible to load the shelves, and an internal position (14) of the no 9, in which each said loading surface is inserted above a corresponding cooking surface (8) of the oven (9), said carriage (1) realizing, by means of the aforementioned movement between said external and internal positions of the oven ( 9), unloading the loaves (7) from said frames (5) onto said cooking hobs 8, loading the loaves (7) from said cooking hobs (8) onto said blades (6), unloading said pans (4) from said loading surfaces (3) onto said cooking surfaces (8) as well as the loading of said pans (4) from said cooking surfaces (8) onto said loading surfaces (3), actuator means (40) with manual operation being provided to connect said frames (5) and said blades (6) to the trolley (1), as well as to hold said pans (4) selectively integral with said loading surfaces (3) of the trolley (1) or integral with said corresponding cooking hobs (8) of the oven (9). 2. Trolley according to claim I, characterized in that said actuator means (40) comprise: - a locking member (15) which can be moved by means of a manual actuator (19) between a free position (20), in correspondence with which it is possible the insertion of said frames (5) or of said blades (6) on said loading surfaces (3) of the trolley (1), and a stop position (21), in correspondence with which said tefaini (5) and / or said blades (6) are anchored to the trolley (1) by first coupling elements (16) mounted on said locking member (15) in correspondence of each loading plane; -a holding mechanism (17) able to stop said pans (4) on said corresponding cooking surfaces (8) of the oven (9) during a phase of loading the loaves (7), determining, when the trolley (1) is inserted in the oven (9) the sliding of said pans (4) on said support profiles (2) of the trolley (1) and their unloading on said surfaces are moved from said internal position (14) to said external position (13) (8), said retention mechanism (17) being furthermore adapted to stop said pans (4) on said loading surfaces (3) of the trolley (1) during a phase of unloading the loaves (7), determining, when the trolley (1) is moved from said external position (13) to said internal position (14), the delivery of said pans (4) on said support profiles (2) of the trolley (1) and the consequent extraction of the pans (4) from the oven (9) during the subsequent movement of the trolley (1) from said internal position ( 14) to said external position (13). 3. Trolley according to claim 2, characterized in that said locking member (15) consists of a first frame (18) mounted in said rear thrust zone (10) of the trolley (1), rigidly connected to said first elements (16) having a free end able to engage and disengage in and from a corresponding first seat (22) made on each said frame and on each said blade when said frames (5) and said blades (6) are inserted on said loading surfaces (3) abutting on said first frame (18) and when the latter is moved respectively from said free position to said stop position (21) and vice versa. 4. Trolley according to claim 3, characterized in that said first frame (18) is substantially constituted by a first bar mounted vertically in the rear area (10) of the trolley (1) in a central position, which can be moved vertically in a manner guided by said actuator manual (19) between said free position (20) and said stop position (21). 5. Trolley according to claim 4, characterized in that said manual actuator (19) consists of a lever carrying an eccentric connected to said first bar (18). 6. Trolley according to claims 3 and 4, characterized in that said first coupling elements (16) are mounted in front of said first bar (18), with respect to the direction of advancement of the trolley (1), have said free ends facing downwards, and are mutually spaced apart by the same distance between said cooking surfaces (8) of the oven (9). 7. Trolley according to claim 2, characterized in that said retaining mechanism (17) comprises: - at least a second mobile frame (23) mounted in correspondence with the rear area (10) of the trolley (1), engaged by means of at least a second hooking element (25) on a corresponding support element (26) integral with said locking member (15), said second movable frame (23) extending vertically in correspondence with all loading surfaces (3) on which said pans (4) abutting on its front face; -at least a second seat (29) obtained on at least a first invitation element (27) integral with said oven (9), equipped with a ramp (28) facing towards the opening of the oven (9), able to guide, up to to said second seat (29), during the movement of the trolley (1) from said external position to said internal position (14), at least one corresponding third coupling element (30) obtained on said second movable frame (23). 8. Trolley according to claim 7, characterized in that during said loading phase, when the trolley (1) is moved from said external position (13) to said internal position (14), said third coupling element (30) slides on profile of said ramp (28) reaching and anchoring itself to said second seat (29), thereby transporting said second movable frame (23) from a lowered position (31) to a raised position (32), correspondingly disengaging said second coupling element (25) by said support element (26), and realizing, when the carriage (1) is moved from said internal position (14) to said external position (13), the holding on the furnace (9) of said second frame ( 23) mobile and said pans (4). 9. Trolley according to claim 7, characterized in that during said unloading phase when the trolley (1) is inserted in said internal position (14) to the oven (9), said locking member 15 is moved up to an intermediate position (33) in correspondence with which said third coupling element (30) is free from said second seat (29) and said second coupling element (25) is engaged on said support element (26) thus allowing the carriage ( 1) the extraction from the oven (9) of said second movable frame (23) and of said pans (4) is moved from said internal position (14) to said external position (13). 10. Trolley according to claim 2, characterized in that during said unloading phase said blades (6) are inserted on said loading surfaces (3) in correspondence with those said cooking surfaces (8) of the oven (9) on which surfaces the loaves (7) are placed directly, as the latter are collected on the blades (6), during the movement of the trolley (1) from the external position (13) to the internal position (14) and being extracted from the oven (9), during the subsequent movement of the trolley (1) from the internal position (14) to the external position (13). 11. Trolley according to claims 8 and 9, characterized in that when said locking member (15) is arranged in said intermediate position (33) said first coupling elements (16) remain engaged on said first seats holding said blades (6 ) anchored to the trolley (1) and allowing, during said unloading phase when said trolley (1) is moved from said internal position (14) to said external position (13), the simultaneous extraction of said pans (4) and bread (7) arranged on said hobs (8) of the oven (9). 12 Trolley according to claim 2, characterized by the fact that each said frame has at least one laterally protruding element (34) connected to a bread-holder mat wound in a ring on two rollers mounted at the front and rear ends of the frame itself, able to be inserted into a third seat (35) obtained on at least a second invitation element (36), integral with the oven (9), during said firing phase, when the trolley (1) is moved from said external position (13) to said internal position (14), thus allowing the unrolling of said frames (5) and the consequent laying of the loaves (7) on said cooking surfaces (8) of the oven (9) when the trolley (1) is subsequently moved from said internal position (14) to said external position (13) to the oven (9). 13 Trolley according to the preceding claims, characterized in that during the loading phase the trolley (1) is loaded by means of said frames (5) arranged on a first series of said loading surfaces (3) and by means of said pans (4) arranged on a second series of said loading surfaces (3), said second movable frame (23) extending in the rear area (10) of the trolley (1) along the entire height of said second series of said loading surfaces (3), said protruding lateral elements (34) of said frames (5) and said third hooking elements of said second frame (23) being able to fit respectively inside said third and second seat (29) when the trolley (1) is moved by said external position (13) to said internal position (14). 13 Trolley according to claim 7, characterized in that said second frame (23) is constituted by a second bar mounted vertically in a central position in the rear area (10) of the trolley (1), equipped with shaped holes whose upper profile forms said third coupling element (30). 14 Trolley according to claim 7, characterized in that each said first guide element (27) is mounted on a said hob (8) of the oven (9) in a substantially central position. 15. Trolley according to claim 1, characterized in that said support profiles (2) are fixed to said trolley (1) only in the rear region (10) thereby realizing a plurality of support brackets. 16. Trolley according to claim 1, characterized in that said support profiles (2) are equipped with at least one sliding bearing (39) able to support slidingly said pans (4), said blades (6) and said frames (5 ). 17. Trolley according to claim 1, characterized in that it can be operatively associated with a collecting trolley (41) equipped with wheels, which can be loaded with a plurality of baskets (42) that can be stacked on top of each other, said collecting trolley (41) being which can be positioned near said front area (12) of the furnace-oven trolley (1) when the latter has said shovels (6) filled with loaves (7), each of said baskets (42) inserted on its loading surfaces (3) ) when placed on said loading trolley (41) being able to receive the loaves from at least one of said shovels (6), said collecting trolley (41) comprising a fixed basket (43) integral with the collecting trolley (41) suitable for receiving the loaves from the blades (6) located further down on the furnace-extractor trolley. 18. Trolley according to claim 1, characterized by the fact that it comprises a push pedal (45) disposed in proximity to said rear region (10) of the trolley (1) able to abut, when operated by! foot of an operator, on a fixed base (46) of the furnace, to facilitate the extraction of the trolley (1) from the furnace during the movement of the latter from said internal position (14) to said external position (13). 19. Baking-oven trolley according to the preceding claims and according to what is described and illustrated with reference to the figures of the accompanying drawings and for the aforementioned purposes.