PALLETISATION LINE

Description

DESCRIPTION PALLETISATION LINE The present invention relates to a palletizing line of the type specified in the preamble to the first claim. Accordingly, the invention concerns a line for palletizing blocks of paper sheets, in paper box detail, configured to arrange and stack said blocks of paper sheets, for example on a pallet. In particular, this line is concerned with the palletization of blocks of paper boxes or containers, generally parallelepiped in shape, folded over on themselves to form a sheet-like structure, mostly square or rectangular, composed of superimposed layers, each of which identifies at least one side of the said box. As is known, the function of a palletizing line is to move, individually or preferably stacked in blocks, boxes or other paper sheets placing them according to a predefined arrangement order on an area of palletization usually identified by shipping pallets. The blocks of paper sheets generally arrive at the palletizing line with a uniform orientation so as to allow the palletizing line to move the boxes regardless of their size. The known palletizing lines are mainly made up, ordered according to to the advancement of the boxes along the said line, from an initial group configured for receive the blocks of sheets entering the said line, a box handling group and a group of stacking paper sheets on a pallet. The initial group can be configured to receive blocks of paper sheets coming out from a production line of said boxes. Alternatively, it can be identified as a station of palletizing of said paper sheets. The handling group consists of a continuous transport system configured for define a mobile surface for supporting sheets of paper so as to move the boxes along a preferred movement path. The transport system is a belt conveyor or a series of rollers, idle and / or motorized. The handling group can include a paper sheet orienter. The orientor is configured to rotate the blocks of sheets moving along the said trajectory. around an axis of rotation normal to the contrast surface. An example of an orientor is described in patent application US2004069596A1. It features a rotatable cylinder, in a mad or motorized manner, around said axis of rotation and configured to intercept the sheets of paper which, therefore, by hitting the said cylinder, rotate, changing their orientation. The stacking group includes a stacking station on which a pallet is placed and a robotic arm for picking blocks of sheets from the line. The prior art described includes some important drawbacks. In particular, the box palletizing lines represent, from the point of view productive, the bottleneck of the entire production system. In fact, they present a processing speed (i.e. handling and stacking) lower than the speed of production / loading of paper sheets on said line. Therefore, a major drawback lies in the fact that the palletizing lines, a due to this slowness of processing, they cause a slowdown of the entire system productive with a consequent increase in production costs. It should be noted that, to limit this inconvenience, some palletizing lines have an intermediate lifting group, placed between the handling and stacking groups of the palletizing line, facilitating the picking and handling of blocks of sheets from part of the robotic arm and then their stacking. The intermediate group performs two operations, the first of which is especially specific to the blocks of paper sheets, consists of alignment and the second in lifting. The first function is performed by a first stroke perpendicular to the trajectory of movement and second beats parallel to the movement trajectory and configured to come into contact with the sheets when in contact with the first beat. The lifting, performed only after the alignment, involves moving the blocks of sheets of paper along a normal to the contrasting surface so as to facilitate and therefore speed up robotic arm operations. It is highlighted that the introduction of the lifting group has only partially solved the the aforementioned inconveniences which are therefore substantially unresolved to date. In this situation the technical task underlying the present invention is to devise a line of palletization capable of substantially overcoming at least some of the drawbacks cited. Within the scope of this technical task, it is an important aim of the invention to obtain a line of palletizing having an increased processing speed and which, therefore, does not define a bottleneck in a production system. Therefore, an important object of the invention is to provide a palletizing line which, despite a reduced complexity of production, you speed up production overall allowing to reduce production costs The technical task and the specified purposes are achieved by a palletizing line as claimed in the appended claim 1. Examples of preferred embodiments are described in dependent claims. The features and advantages of the invention are clarified below by the description. detailed preferred embodiments of the invention, with reference to the accompanying drawings, in which: Fig. 1 shows, to scale, a palletizing line according to the invention; Fig. 2 illustrates, to scale, a portion of the palletizing line according to the invention; Fig. 3a-3d show, to scale, a function sequence of a second portion of the palletizing line in which, in particular, the support surface is respectively in reception position (3a, 3b), deviation position (3c) and additional deviation position (3d); Fig. 4a shows, to scale, an assembly of the palletizing line according to the invention; Fig. 4b shows, to scale, an exploded detail of the assembly in Fig. 4a; Fig. 5 shows, to scale, a section of a further assembly of the line of palletizing according to the invention; Fig. 6 shows, to scale, a perspective view of a further different assembly of the palletizing line according to the invention. Fig. 7 shows, to scale, a subassembly of the assembly in Fig. 6; Fig. 8 shows, to scale, a view of a second subassembly of the assembly of Fig. 7; Fig. 9a is, to scale, a different view of the second subassembly Fig. 8; Fig. 9b shows, to scale, the second subassembly of Figs. 8 and 9a in a different position. In this document, measurements, values, shapes and geometric references (such as perpendicularity and parallelism), when associated with words like "about" or other similar ones terms such as "almost" or "substantially" are to be understood as meaningless unless there is error measurement or inaccuracies due to production and / or manufacturing errors and, above all, to less than a slight deviation from value, measure, form or reference geometric to which it is associated. For example, such terms, if associated with a value, indicate preferably a divergence of no more than 10% of the value itself. Also, when used, terms such as “first”, “second”, “superior”, “inferior”, “main” and “secondary” do not necessarily identify an order, a priority of relationship or relative position, but can simply be used for more clearly distinguish between different components. Unless otherwise indicated “perpendicular”, “transverse”, “parallel” or “normal” or other terms of geometric positioning between geometric elements (for example axes, directions and lines) are to be understood in reference to their mutual position geometric between the corresponding projections. These projections are defined on a single plane parallel to the plane(s) in which the said geometric elements are arranged. The measurements and data reported in this text are to be considered, unless otherwise indicated, as carried out in ICAO International Standard Atmosphere (ISO 2533:1975). Unless otherwise specified, as is apparent from the following discussions, it is considered that terms such as "treatment", "informatics", "determination", "calculation", or similar, are refer to the action and / or processes of a computer or similar computing device electronic that manipulates and / or transforms data represented as physical, such as quantities electronic records of a computer system and / or memories in, other similar data represented as physical quantities within computer systems, registries, or other devices for storing, transmitting or displaying information. With reference to the Figures, the palletizing line according to the invention is globally indicated with the number 1. It is configured to palletize blocks of 10 sheets of paper on a support, for example on a pallet. Preferably, palletizing line 1 is configured for palletize only blocks of 10 sheets of paper on a pallet. More exclusively still line 1 is configured to arrange and stack blocks 10 of sheets paper defined by one or more paper boxes folded on themselves forming the said sheet and stacked. Each block 10 defines an axis of prevalent extension and, therefore, a first side parallel to the axis of prevalent longitudinal extension and a second side perpendicular to the axis of prevalent extension and preferably of shorter length on the first side. It is highlighted that a block 10 can include one or more paper sheets (in in particular one or more folded paper boxes) stacked together and appropriately tied between them thanks to, for example, a cable tie. The palletizing line 1 comprises, in broad terms, an initial group 2 configured to receive blocks 10 in input on said line 1. The initial group 2 is configured to receive blocks 10 from a production line and, therefore, it is configured to connect line 1 with said production line. Alternatively or addition, the initial group 2 is configured to receive the blocks 10 from loading means (for (e.g. pallet truck or forklift) configured to arrange 10 blocks in said group initial 2. The initial group 2 may be of a known type and therefore not further described. The palletizing line 1 comprises a stacking group 3 configured for move said blocks 10 in at least one palletizing area 3a preferably by taking them from at least one 3b sampling area (in detail preferably only one); and a handling group 4 configured to arrange blocks 10 in picking area 3b and, in detail, move the blocks 10 from the initial group 2 to said picking area 3b. The handling group 4 is preferably configured to arrange the blocks 10 in the collection area 3b by moving the blocks 10 at least along one trajectory of movement and in accordance with a direction of advancement of the blocks 10 at least long said trajectory. In detail it is configured to move the 10 blocks from the group initial 2 to collection area 3b. In this document, the expressions "downstream" and "upstream" are to be understood, therefore, in agreement to the said direction of advancement. The trajectory may include a first section defining a first direction 4a of movement; preferably a second section downstream of the first section and defining a second direction 4b of appropriately transverse movement, for example normal, to the first direction 4a; and more preferably still a third section upstream of the first section and defining a third direction 4c of movement appropriately transverse, for example normal to the first direction 4a. One or more of the first, second and third directions 4a, 4b, 4c can be straight. The movement group 4 comprises a plurality of stations each defining a supporting surface 4i of blocks 10. Conveniently each support surface 4i is parallel to the floor plane and therefore perpendicular to the gravitational gradient. The trajectory and therefore first and second direction 4a, 4b, and if present also the third direction 4c, are appropriately parallel to one or more surfaces 4i. One or more stations can be configured to move said blocks 10 along part of the movement trajectory. Consequently, at least one station can include a mover defining said support surface 4i and a direction of advancement; and preferably a frame configured to secure said mover to the ground. The handler, illustrated in Fig. 5, can be of the continuous type. In detail it can understand a continuous conveyor 41 extending along a closed path developing along the said direction of advancement; rolling elements 42 hinged crazily to the conveyor 41 defining an axis of rotation and protruding from them defining said support surface 4i; and a motor 43 kinematically connected to the conveyor 41 so to move it along the said closed path (i.e. along the direction of travel) by dragging the rollers 42 and then the blocks 10 along the direction of advance. The conveyor 41 may comprise mutually hinged blocks and / or a belt or other similar continuous transport system. The rolling elements 42 can be balls or rollers. The direction of advance can be centroid of the support surface 4i. Each station can be configured to move the blocks 10 even along a direction of drift transverse, for example normal, to the direction of travel. In this case fine, the rollers 42 (in this case preferably identifiable as spheres) protrude from the conveyor 41 is in correspondence with a first face defining said surface of support 4i is of a second face opposite to the first with respect to the same conveyor 41; and the handler may also include a continuous belt 44 in contact with the rolling elements 42 at the second face and configured to move along the drift direction by rotating the rollers 42. The rollers 42 can thus rotate with respect to the conveyor 41 around an additional transverse rotation axis and in detail perpendicular to the direction of drift, and preferably parallel to the direction of advance, dragging the 10 blocks also along the drift direction. The additional axis of rotation is transverse and in detail perpendicular to the axis of rotation. It is highlighted that in the case of movement of both the belt 44 and the conveyor 41, the rolling elements 42 can rotate in accordance with both the rotation axis and the supplementary axis of rotation. The drift direction may be centroid of the support surface 4i. The motor 43 can be kinematically connected to the continuous belt 44 so as to control said movement. In detail, the motor 43 is kinematically connected both to the belt 44 and to the conveyor 41 and, appropriately, configured to move them in independently of each other. Engine 43 can be electric. The movement group 4 comprises several stations that can be operated in an appropriate manner independent of each other. In detail, it includes at least one handling station 4d configured to move blocks 10 by defining a pair 10a of blocks 10 (i.e. exclusively two blocks 10) in mutual contact appropriately in correspondence with the first side of each block 10; at least one flanking station 4e, preferably a single one, configured to receive the blocks 10 from said handling station 4d and simultaneously move a pair 10a of blocks 10 appropriately towards the stacking group 3. Said stacking station 4e is configured to move the 10 blocks also individually. In more detail, the handling group 4 can be without robotic arms or other similar solutions for the movement of blocks 10. Consequently, along the trajectory of advancement, the movement of the blocks 10 is performed exclusively by said stations. The pair 10a therefore identifies two blocks 10 horizontally (i.e. parallel to the support surface 4i) placed next to each other and in contact with each other. Said at least one 4d handling station may comprise a handling device as described above. Said at least one 4d handling station is configured to handle the blocks 10 along a direction of advancement coinciding with the first direction 4a. Of consequently, the said 4d movement station provides a drift direction transverse, preferably normal, to the first direction 4a and preferably parallel to the second direction 4b. The first direction 4a can be centroid to the support surface 4i defined by the one or more 4d handling stations. Preferably the handling group 4 comprises several handling stations 4d sequentially arranged along said first direction 4a and mutually distinguishable as at least a first handling station 4 d' preferably defining a first support surface 4 i'and a second handling station 4 d'' preferably defining a second support surface 4 i' '. Preferably, to these a further third handling station 4 d' ' preferably defining is added a third support surface 4 i' ''. More preferably the 4d' handling station comprises a first handler defining a first support surface 4i'; the second station 4d'' comprises a second mover defining the second support surface 4i'''; and if present the third handling station 4d'' includes a third handler defining said third support surface 4i'''. Each of the said first, second and / or third mover is analogous to the mover described above. In particular, the first 4d' handling station is located downstream of the second 4d'' handling station. If present, the third 4d''' handling station is interposed between the first and second station 4d', 4d''. As highlighted in Fig. 1 one or more handling stations 4d, 4d', 4d'', 4d''' can include a 45 beat for blocks 10 along the drift direction. Each 45 beat can be configured to also determine a rotation of the blocks 10 (appropriately if moved both along the drift direction and along the of movement) around an axis normal to the support surface 4i, 4i', 4i'', 4i''' and preferably with an angular width of 90°. To this end it is configured to go to contact with block 10 at a contact point on the side of the block 10 normal to the first direction 4a (i.e. to the direction of advancement) and proximal to a side of block 10 parallel to the direction of advance. It should be noted that in the case of multiple 4d stations having said 45 beat, any rotations given by the said 45 bars have the same angular amplitude and appropriately the same towards. In general, the ledge 45, therefore, comprises a defining bulkhead 451 and a surface of contrast 451b on which the block 10 slides and an edge 451a of incidence of said block (in detail of the contact point) which then hits said edge, rotates and then comes to rest on the said surface 51b. The contrast surface 451b is parallel to the first direction 4a. The edge 451a identifies one side of said stop 45 and to be precise of the bulkhead 451 normal to the first direction 4a. It is identifiable by a rolling element hinged to the said bulkhead 451 defining said incidence edge 451a and preferably hinged madly to the bulkhead by defining an axis of revolution perpendicular to the surface of support 4i, 4i', 4i'', 4i'''. The first 4d' movement station can therefore include a first 45' beat defining a limit switch for blocks 10 along the drift direction. The first 45' bar includes a first bulkhead 451' defining a first surface of contrast 451b' and preferably a first incidence edge 451a' configured for cause said rotation of the blocks 10. The first bulkhead 451' can be static and, therefore, always at the same distance from the first direction 4a. In detail, the first contrast surface 451b' is spaced from the first direction 4a and in particular located in correspondence with a perimeter side of the first support surface 4i' defined by the first station 4d. The second 4d'' movement station can include a second 45'' stop comprising, in turn, a second bulkhead 451'' defining a second edge of incidence 451a'' and a second contrast surface 451b''. The second bulkhead 451'' can be movable along the drift direction, i.e. perpendicular to the first direction 4a. To this end, the second 45'' beat can comprising a movement element 452, for example pneumatic or electric, configured to move the second bulkhead 451'' along the drift direction appropriately between a juxtaposition configuration in which the second surface of contrast 451b'' has minimum distance from the first direction 4a and a configuration of distance in which the second contrast surface 451b'' has maximum distance from the first direction 4a. This minimum distance can be 0.1 m. This maximum distance may be greater than the distance of the first surface 451b' from the first direction 4a. It can be 0.2 m. The third 4d''' handling station can include a third 45''' stop configured to define a stop for blocks 10 when moved along the direction of drift of the second 4d handling station''. The third 45''' beat can be configured to determine a rotation of the 10 blocks equivalent to that of the second 45'' measure. It therefore includes a third bulkhead 451''' defining a third incidence edge 451a''' and a third contrast surface 451b'''. The third bulkhead 451''' can be static and, therefore, the contrasting surface is always at the same distance from the first direction 4a. In detail, the third contrast surface 451b''' may be at a distance from the first direction 4a greater than the distance of the first contrast surface 451b' from the first direction 4a and preferably substantially not greater than the said maximum distance. In particular, the distance of the third surface of contrast 451b''' from the first direction 4a is substantially equal to said minimum distance. The 4e docking station is configured to receive blocks from the docking station. 4d movement and move them towards stacking group 3. In detail it is configured to receive blocks 10 and move them first along the first direction 4a and subsequently along the second direction 4b. In more detail, the station of 4e side-by-side is configured to move blocks 10 along a direction of advancement coinciding with the second direction 4b and a drift direction parallel to the first direction 4a. This 4e flanking station is configured to simultaneously move a pair 10a of said blocks 10 and / or a single block 10. The 4e flanking station may preferably define a fourth surface of support 4 i' ' ''. The flanking station 4e may include a fourth mover (suitably similar to the handler described above) defining said fourth support surface 4i''''. The flanking station 4e defines an input side of the blocks 10 in the same station 4a (i.e. on the fourth support surface 4i'''') proximal to at least one 4d handling station and in particular the second handling station 4d''; and preferably an exit side of the blocks 10 from the same station 4a (i.e. from fourth support surface 4i'''') proximal to stacking assembly 3. The input side can be transverse, i.e. perpendicular, to the first direction 4th. The exit side can be transverse, i.e. perpendicular, to the second direction 4b. The flanking station 4e may include a limit switch 46 of the input blocks 10 in the 4e flanking station and then moving along the drift direction and so, in this case, along the first direction 4a. The limit switch 46 may comprise a support wall 461 defining a surface of support 461b for blocks 10 entering station 4e. Said support surface 461b is parallel to the second direction 4b and to be precise perpendicular to the first direction 4a. It therefore defines a stop for the blocks 10 when moving along the first direction 4a. The supporting wall 461 can be movable along the first direction 4a so as to vary the distance of the supporting surface from the entrance side and / or from the second direction 4b. Of consequently, the limit switch 46 may comprise a translator 462, for example pneumatic or electric, configured to translate the support wall 461 along the first direction 4a by varying, appropriately in a continuous manner, said distance and preferably defining for said limit switch 46 one or more positions. Said one or more positions provide a deviation position in which the contact side between blocks 10 of pair 10a are barycentric to said fourth support surface 4i''''. Of consequently, the distance of the supporting wall 461 and in detail of the surface of support 461b from the second trajectory 2b is essentially between 80% and 120% and in detail between 90% and 110% of one side and in particular of the second side of block 10. More specifically, in the deviation position, this distance is almost equal to one second. side. Said one or more positions may also include an additional position deviation in which the distance of the supporting wall 461 and therefore of the surface of support 461b from the second trajectory 4b is essentially between 40% and 60% and in detail between 45% and 55% of one side and in particular of the second side of block 10. In detail in the position of additional deviation this distance is almost equal to half of the second side. This additional deviation position is adopted when station 4e moves a single block 10. Said one or more positions preferably include a receiving position in which the first block 10 comes into contact with the support surface 461b, positioning itself flush with the side of entrance. In detail, the distance between the support surface 461b and the entrance side is therefore almost between 80% and 120% and in detail between 90% and 110% of one side and in detail of the second side of block 10. To be precise, in the receiving position such distance is almost equal to the second side. Furthermore, the handling group 4 may also include at least one station removal 4f, placed between the flanking station 4e and the stacking group 3, configured to make blocks 10 available to said stacking group 3. Preferably the handling group 4 comprises a single station removal 4f. The 4f removal station can include an additional similar mover to the above-described handler. The removal station 4f is configured to receive blocks 10 from the 4e side by side (suitably in correspondence with the exit side) and move them towards stacking group 3. In detail, it is configured to receive and move the blocks 10 along the second direction 4b identifying the direction of advancement of said 4f removal station. In addition, in the case of a trajectory including a third direction 4c the group of movement 4 may also include one or more additional stations 4g movement configured to move blocks 10 along at least said third direction 4a. Each of the said one or more additional 4g handling stations can include a mover similar to the mover described above. Said one or more additional 4g handling stations are configured for move the 10 blocks along a direction of advancement coinciding with the third direction 4c; and a drift direction parallel to the first direction 4a. Said one or more additional 4g handling stations can be configured to move the blocks 10 entering the handling station 4d and preferably exiting from the initial group 2. The handling group 4 also includes a 4h alignment station defining a fifth support surface 4i '' '' '. The 4h alignment station (Fig. 6) can be configured to handle blocks 10 along the movement trajectory and in particular along the second direction 4b. This, therefore, it includes a fifth block mover 10 defining the fifth surface of support 4i'''''. The 4h alignment station is configured to align the sheets of a 10a pair of blocks and / or of a single block 10 at least parallel to the second direction 4b. It, therefore, also comprises an aligner 47 of the sheets constituting the blocks 10 and preferably entirely placed above the fifth supporting surface 4i'''''. In this document the terms “above” and “below” respectively identify a point at greater and lesser gravitational potential; and therefore “above” is at a greater distance from the walkable surface on which line 1 is placed while “below” is at a shorter distance from the surface walkable surface on which line 1 is placed. Aligner 47 is spaced apart and therefore not in contact with the fifth support surface 4i'''''. The aligner 47, highlighted in Fig. 7, is configured to align the sheets, so appropriately exclusive, parallel to the second direction 4b. It, therefore, includes two 471 panels configured to come into contact with the sheets (and therefore with a block 10 and / or a pair 10a) on opposite sides to the direction 4a and therefore to the block 10 and / or to the pair 10a; and a guide 472 configured to control a mutual movement between the panels 471 along an alignment axis 47b. Each panel 471 is placed above the fifth support surface 4i'''''. Each panel 471 may define, in addition to the alignment surface 47a, a invitation surface 47c configured to favor contact with block 10 and / or pair 10a on the alignment surface 47a. Each invitation surface 47c identifies a surface having distance from the second direction 4b monotonically variable with maximum value distal from the surface of alignment 47a and minimum at alignment surface 47a. Of consequently, the invitation surfaces 47c of said two panels 47 define a “cone” of the entrance of the blocks 10 between the alignment surfaces 47a. This minimum value is equal to the distance of the alignment surface 47a from the second direction 4b. The lead surface 47c is upstream of the alignment surface 47a. The alignment axis 47b may be parallel to the fifth support surface 4i'''''. The alignment axis 47b may be perpendicular to the alignment surfaces 47a. The guide 472 can be configured to move both panels 471. In detail, it is configured to move the panels 471 appropriately in a dependent or independent. In more detail, the guide 472 controls the panels 471 with the same speed module and opposite direction. Consequently the alignment surfaces 47a are always equidistant from the second trajectory 4b. Guide 472 can define a maximum distance and a minimum distance between the surfaces of alignment 47a and then be configured to move and stop the panels 471 defining a distance between the alignment surfaces 47a included between said distance minimum and maximum. The maximum distance can be basically between 2 m and 1.5 m in detail approximately equal to 1.7 m. The minimum distance can be substantially between 0.7 m and 0.5 m in detail approximately equal to 0.33 m. The guide 472 may comprise a rail 472a defining the alignment axis 47b; and two trolleys 472b each of which is attached to said panel 471 and slides along said rail 472a. The rail 472a can be motorized so as to control the sliding of the trolleys 472b along said axis 47b. Guide 472 and to be precise rail 472a is placed above the fifth mover and then to the fifth support surface 4i'''''. In detail, the guide 472 and in particular the rail 472a is spaced from the fifth surface 4i''''' by a working distance equal to the height of block 10 (i.e. the extension of block 10 along a direction normal to the fifth support surface 4i'''''). More specifically, this working distance is at least equal to substantially between 0.7 m and 0.3 m and in detail almost equal to 0.45 m. Each panel 471 has a height (also calculated along a normal direction to the fifth supporting surface 4i''''') less than the distance between guide 472 and the supporting surface support 4i so as to avoid contact of the panel 471 against the support surface 4i. Preferably the height of the panel 471 is between 90% and 70% of said distance. of work. The alignment station 4h may also include a stop body 48 (Figs. 8, 9a, 9b) of the advancement of the blocks 10 on the fifth support surface 4i'''''. The stop body 48 is configured to stop the advancement of the blocks 10 on the fifth support surface 4i''''' when said blocks 10 are in contact with the at least one alignment surface 47a. The stop body 48 defines at least one stop surface 48a against which the blocks 10 they come to a stop when moved along the movement trajectory on the fifth support surface 4i''''. The stop surface 48a and in particular the stop body 48 are in correspondence of the fifth support surface 4i''''' and not upstream from the alignment surface 47a. Preferably they are downstream from the alignment surface 47a (in detail to the aligner 47. Alternatively they are superimposed on said alignment surface 47a to with respect to the normal to the second direction 4b. The stop body 48 is loosely constrained to the fifth support surface 4i''''' (i.e. to the fifth mover) and defines an active position (Fig. 9b) in which the stopping surface 48a protrudes at least partially from the fifth supporting surface 4i''''' (i.e. protrudes towards panel 471 and therefore able to come into contact with blocks 10) and a position passive (Fig. 9a) in which the stop surface 48a does not protrude from the fifth surface support 4i''''' and therefore is not able to come into contact with the 10 blocks. The stop body 48 may also define a slide 48b configured to lift and distance at least part of the blocks 10 and in particular at least the edge of the blocks 10 from contact with the stopping surface 48a. The slide 48b may be integral with the stop body 471. Consequently, in position activates the slide 48b protrudes partially from the fifth support surface 4i''''' (i.e. at least the first end protrudes by lifting at least one edge of the blocks 10) and a passive position in which the slide 48b does not protrude from the fifth surface 4i''''' and therefore does not lift the blocks from said fifth support surface 4i'''''. Slide 48b defines a sliding surface inclined with respect to the fifth support surface 4i'''''. Consequently, at least in the active position, the slide 48b, therefore, defines a first extremity protruding from the fifth surface 4i''''' and proximal to the stop surface 48a and a second non-protruding end the fifth surface of support 4i''''' and distal from the stopping surface 48a. The fifth mover may be similar to the mover described above. Alternatively, the fifth mover can be separated from that of the other stations. for example, it can be configured to define a housing for each body of stop 48. Preferably the fifth mover comprises a plurality of belts (as illustrated in Figs. 6, 8-9b) mutually spaced so as to define between them belts called housing for the stop bodies 48. The handling group 4 can also include a final station 4l configured to arrange the blocks in the picking area 3b. The final station 4l is downstream of the alignment station 4h so as to receive the blocks 10 only after the alignment of the sheets. Consequently, at least one block 10 and / or at least one pair 10a undergoes movement after the sheets have been aligned. The final station 4l defines a sixth support surface 4 i' '' ' ''. It is configured to move the blocks 10 exiting from the station on the sixth surface 4i'''''' 4h alignment along the movement trajectory and in particular along the second direction 4b. For this purpose the final station 4l can include a sixth mover, appropriately analogous to the above described mover, defining said sixth surface of support 4i'''''''. The sixth mover and thus the sixth support surface 4i'''''' are configured for receive blocks 10 and / or pair 10a exiting from alignment station 4h. Accordingly, the final station 4l may comprise a lift 48 defining said picking area 3b and configured to lift blocks 10 from said sixth surface of support 4i'''''' to said collection area 3b defining a lifting axis 48a. The sampling area 3b is parallel to the sixth support surface 4i''''''. The sampling area 3b is located above the sixth support surface 4i''''''. The lifting axis 48a is perpendicular to the sixth supporting surface 4i'''''' and preferably to the said sampling area 3b. It is therefore also perpendicular to the plane defined by directions 4a and 4b. The lift 48 is configured to lift along said axis 48a one or more blocks 10 and, appropriately, also overlap them along the lifting axis 48a defining an assembly of 10 blocks. In particular, it is configured to lift a pair 10a of blocks 10 and appropriately overlap it with a second pair 10a along the said lifting axis 48a. Alternatively or additionally, the lift 48 is configured to lift a single block 10 and appropriately overlap it with another block 10 along the lifting axis 48a. This set therefore identifies at least two blocks 10 (four in detail) vertically (i.e. perpendicular to the sixth supporting surface 4i'''''') two by two between them placed side by side and in mutual contact. The lift 48 may comprise a first lifting column 481 and a second lifting column 482. The first lifting column 481 may be proximal to the alignment station 4h. The second lifting column 482 may be distal from the alignment station 4h. The sampling area 3b is located between columns 481 and 482. The sixth support surface 4i'''''' is between columns 481 and 482. Each column 481 and 482 may include a lifting body (e.g. a profiled) configured to come into contact with a block 10 and in particular with both blocks 10 of a pair 10a by lifting them from the sixth supporting surface 4i''''''. Of consequently, the first lifting column 481 comprises a first body of lifting 481a and the second column 482 includes a second lifting body 482a. The lifter 48 may also include a plate 483 configured to intercept and stop the advancement of blocks 10 and / or a pair 10 along the trajectory of movement and in particular along the second direction 4b. Plate 483 defines an intercept surface 483a perpendicular to the second direction 4b. The intercept surface 489a identifies the surface against which the blocks 10 and / or the pair 10a comes into contact at the end of the movement along the movement trajectory. The plate 49 and hence the intercept surface 483a are static. The plate 483 and hence the intercept surface 483a are located distal from the station of 4h alignment. The intercept surface 483a is downstream of the second column 48 and in detail of the second lifting body 482a which is then able to lift the blocks 1' when in contact with said intercept surface 483a. The stacking group 3 is configured to palletize blocks 10 and / or pairs 10a. It is then it is configured to stack the blocks 10 at said at least one area of palletization 3a and to be precise take the blocks 10 from the picking area 3b and arrange them in palletizing area 3a. The stacking group 3 is configured to handle at least one pair 10a of blocks 10 (in detail a single 10a pair or two overlapping 10a pairs at said final station 4l as described above) and / or at least one block 10 (in detail a single block 10 or two blocks 10 superimposed in said final station 4l). Stacking group 3 can define only one palletizing area 3a. Preferably it defines multiple palletizing areas 3a and to be precise two palletizing areas 3a arranged on the opposite side to the second direction 4b and appropriately equally spaced from said second direction 4b. Each palletizing area 3a is identifiable, for example, in a portion of a floor walkable surface used, for example, for palletizing. It may include a pallet. The stacking group 3 may be of the robotic type and, therefore, comprise a gripper 31 for gripping said blocks, a robotic arm 32 configured to move said gripper 31; and suitably a base structure 33 for anchoring the arm 32 to a support external and preferably on a walkable level. The robotic arm 32 is hinged to the base structure 33 and thus rotates around an axis of movement 3c appropriately substantially perpendicular to said plane walkable and, in detail, parallel to the gravitational gradient. Consequently, the group 3 may comprise a hinge 34 defining said movement axis 3c suitably motorized. Said movement axis 3c can be incident on the second direction 4b. Therefore, the movement axis 3c and the second direction 4b are coplanar. The robotic arm 32 may comprise one or more rigid bodies 32a, identifiable as profiles optionally telescopic. In detail, it preferably comprises a rigid body 32a distal end from the base structure 33. Each rigid body 32a defines a prevalent direction of development. The robotic arm 32 may comprise at least one mechanical joint 32b each interposed between two adjacent rigid bodies 32a and configured to reciprocally move said bodies rigid bodies 32a. Preferably the arm 32 comprises multiple mechanical joints 32b configured to mutually move the rigid bodies 32a in an appropriately independent manner between them. Optionally, the robotic arm 32 may include a final mechanical joint 32b. interposed and therefore binding the final rigid body 32a to the gripper 31. The 32b mechanical joints are configured to move and, to be precise, rotate reciprocally the rigid bodies 32a by varying the angle of separation between adjacent rigid bodies 32a. The gripper 31 may comprise a base 311 attached to the robotic arm 32 appropriately in correspondence with the final rigid body 32a; and one or more gripping bodies 312 of blocks 10. Preferably it comprises at least one pair of gripping bodies 312 of the 10 blocks configured to contact from the opposite side to the 10 blocks which are thus each clamped between said gripping bodies 312. More preferably the gripper 31 comprises a first pair and a second pair of gripping bodies 312 of the blocks 10 as follows to allow the gripper 31 to grasp a pair 10a of blocks 10. Each gripping body 312 defines a gripping surface 312a configured to go to contact with the blocks 10. It can therefore comprise a plate defining said surface of socket 312a and a foot rigidly and peripherally connected to said plate. Preferably, the gripping bodies 312 have the gripping surfaces 312a parallel to each other. The gripping surface 312a may be parallel to the prevailing direction of development of the rigid body 32a final. In order to facilitate the gripping of the blocks 10, the gripper 31 may comprise at least one body of sliding 313 configured to move a gripping body 312 along an axis of 3d implementation appropriately normal to said gripping surface 312a. The sliding body 313 can be configured to reciprocally move the bodies of grip 312 of a pair of bodies 312 along the actuation axis 3d so as to vary the distance between the gripping surfaces 312a. In particular, the gripper 31 comprises two bodies of sliding 313 each of which is configured to move the bodies 312 of a pair of gripping bodies 312 so as to move the gripping bodies independently from each other taken 312 of distinct pairs. A slide body 313 comprises at least one slider engaged with a grip body 312, a guide defining said 3d actuation axis. The sliding body 313 can be configured to move both gripping bodies 312 of a pair appropriately simultaneously and more appropriately with speed of same module and opposite direction. Consequently it includes two cursors each of the which is associated with a gripping body 312 and a guide defining said actuation axis 3d for both cursors. Optionally the gripper 31 may include an additional sliding body 314 configured to reciprocally move the pairs of gripping bodies 312 by varying their mutual distance along a supplementary actuation axis 3e suitably normal to the said 3d implementation axis. The additional sliding body 314 comprises two additional sliders each of which engaged in a pair of bodies 312 and an additional guide defining said additional implementation axis 3e. Each gripping body 312 is preferably resolvably constrained to the base 311 so as to allow a replacement of the grip bodies 312 only. Consequently, the gripper 31 includes for each gripping body 312 a constraint 315 of the gripping body 312 to the rest gripper 31 (to be precise at the base 311, in particular at the handler and more in (particularly to the cursor). Constraint 315 is configured to resolvably constrain gripper body 312 to the gripper rest. 31 and therefore defines an engagement and a release configuration of the gripping body 312 compared to the rest gripper 31. Preferably the transition from the release to the commitment configuration is passive and the switch from the commitment to the release configuration is active, i.e. performed only following an external command such as that given by the control unit introduced below. Consequently, in the event of blockages (for example due to a malfunction) the constraint 315 remains in the commitment configuration and a transition to the disengagement configuration is prevented release. In detail, the constraint 315 preferably comprises a coupling 315a integral with one of gripper body 312 and gripper rest 31 and a seal 315b integral with each other between the gripper body grip 312 and gripper rest 31 and configured to engage or disengage solidly from the hook 315a defining said configurations. The hook 315a may be integral with the body 312 and the seal 315b with the rest of the gripper 31. The coupling 315a may comprise a pin and one or more slots formed on the surface side of said pin. The seal 315b may comprise a housing for said pin and therefore the coupling 315a; and for each slot a locking device for said attachment to said housing. The locking device may comprise a hole facing said housing, a a stop sliding into said hole; a spring configured to push said stop to protrude in said hole so as to insert it into said slot defining the engagement configuration; and a actuator configured to command the stop not to insert itself into said slot by defining said release configuration. Therefore, switching from the commitment configuration to the release configuration release is only performed actively by activating the actuator; while switching from the release to the engagement configuration does not require the use of the actuator. The actuator can be pneumatic and therefore configured to control by depression of said hole the extraction of said stop from said slot and therefore the disengagement between the hook 315a and 315b seal. The stacking group 3 may also include a magazine 35 of gripping bodies 312. The magazine 35 is configured to allow the gripper 31 to replace the gripping bodies 312 thanks to the constraint 315. It comprises one or more pairs of gripping bodies 312 and therefore at least one storage location for each pair of bodies 312. Preferably the grip bodies 312 differ in a different extension of the gripping surface 312a and in detail of the height of the calculated gripping surface 312a perpendicular to said 3d actuation axis. Finally, the palletizing line 1 also includes a control unit of the operation of line 1. This control unit can be identified in a computer or other similar device in data connection (wired or wireless) with the various groups 2, 3 and / or 4 so as to allow control its operation. In detail it is in data connection with the stacking group 3 so as to control the movement of the gripper 31 and / or the grip body changer 312. The control unit is in data connection with stations 4d, 4f and if present 4g, 4h and / or 4l so as to control the advancement of the blocks 10 and / or the pairs 10a. Finally, it is specified that all the support surfaces 4i (in detail 4i', 4i'', 4i''', 4i'''', 4i''''' and / or 4i'''''') are parallel to each other and preferably coplanar. The operation of the palletizing line 1 previously described in terms structural is as follows. In detail, this operation introduces a new procedure of palletization. The palletizing process and in particular the various phases and sub-phases described below are actuable and therefore controllable by the control unit. They are executed according to the order of description unless otherwise indicated. Initially, the process involves a loading phase of 10 blocks in said line 1 appropriately performed in correspondence with the initial group 2. In this phase at least a first and a second block 10 are placed in succession on the line 1 corresponding to the initial group 2. It is highlighted that in the charging phase the blocks 10 can be placed with the axis of prevalent extension and therefore the first side parallel to the movement trajectory and, in in particular, to the first direction 4a or, preferably, to the third direction 4c. In the charging phase the blocks 10 arrive at one or more charging stations 4D movement starting the next phase. In particular, blocks 10 can be moved, appropriately along at least the third direction 4c, by one or more additional 4g handling stations transporting the 10 blocks into the first 4d handling station. The palletizing process therefore involves a coupling phase of two blocks 10 defining a 10a pair. In this phase, the first and second block 10 are moved in sequence. at least along the movement trajectory and in particular the first direction 4a. The coupling phase may include a first movement sub-phase in which the at least one 4d movement station moves along the trajectory of moving the first block 10 by placing it in correspondence with the entrance side of the flanking station 4e and in particular above the supporting surface 4i of the station of 4e support; a second movement sub-phase in which at least one station of movement 4d brings the second block 10 into contact with said first block 10 defining said pair 10a of blocks 10 appropriately leaving it on the surface of 4i support of the 4d handling station adjacent to the flanking station 4e, i.e. the second movement station 4d''; a pushing sub-phase in which also the second block 10 is pushed over the flanking station 4e; and preferably a centering subphase in which the contact side between the blocks is placed barycentrically to the surface 4i support of the 4e flanking station. At the end of the pairing phase and in detail of the second subphase first block 10 and second block have the same side and preferably the second side parallel to the exit side of the 4e flanking station. In the first movement subphase the one or more 4d movement stations they command the advancement of the first block 10, appropriately along the first direction 4a, which then passes through said stations 4d and positions itself on the support surface 4i of the 4e flanking station positioning on the 4e flanking station flush with the entrance side. Preferably, during the first sub-phase the 4d handling stations provide both to advance the first block 10 and to rotate it by a first angle appropriately equal to 90°, 180° or 270° (preferably 180°) conveniently thanks to the 45 stops. For for example, in the case of a first angle equal to 180°, block 10 performs a first rotation of 90° using the third stop 45''' of the third movement station 4d''' and therefore an additional 90° rotation at the second 45'' beat of the second 4d'' handling station appropriately placed in the removal configuration. Preferably, in the first movement sub-phase the limit switch 46 is in the position of reception. Consequently the first block 10 enters the flanking station 4e resting on the support surface 461b of the support wall 461 preferably positioned in correspondence and in particular flush with the entrance side in the same station 4e. At the end of the first movement sub-phase the second side of the first block 10 is parallel to the exit side of the 4e flanking station. In the second sub-phase the one or more 4d movement stations control the advancement of the second block 10, appropriately along the first direction 4a, which then passes through said 4d movement stations and, appropriately remaining on the support surface 4i of a handling station 4d (for example the second one), yes approaches and, therefore, comes into contact with the first block 10 defining said pair 10a. The second sub-phase ends with the contact between the first and second block 10, that is when the second side of the second block 10 is parallel to the exit side of the station 4e support. Additionally, in the second subphase the 4d handling stations can also rotate the second block by a second angle appropriately equal to 90°, 180° or 270° using one or more 45 bars as described above. It is highlighted that at the end of the first and second sub-phase, the 10 blocks are in reciprocal contact at their first or second side and preferably the second side. For this purpose the second angle is equal to the first angle or the difference between said angles is equal to 180°. Preferably, in the second movement sub-phase the limit switch 46 is still in receiving position. Consequently, the first block 10 being supported on the bearing surface 461b of bearing wall 461, the second block 10 hits the first block stopping. In the second movement sub-phase the 4e flanking station can remain with the rolling elements 42 and therefore the supporting surface stationary. In the next push subphase at least one 4d handling station (in detail the second movement station 4d'') moves the pair 10a (i.e. simultaneously the first and second block 10) pushing along the first direction 4a the second block 10 against the first block 10 until the entire 10a pair is on the station of 4e support. Additionally, this action can be supported by the station 4e flanking which moves at least the first block 10 along its own direction of drift. In order to allow this motion in this sub-phase the limit switch 46 starts to move into position of deviation so as to move the bearing surface 461b away from the input side allowing the second block to access the 4e flanking station. The passage of the limit switch 46 in the deviation position ends in the centering sub-phase. Finally, there is the centering sub-phase in which the 10th couple and therefore the contact side between the blocks 10 are centered with respect to the support surface 461b of the station 4e side by side and in particular the contact side between the blocks 10 aligns with the second direction 4b. In detail, the 4e flanking station moves the 10a pair. placing the contact side between the first and second block 10 substantially centered at the support surface 461b of the flanking station 4e, in particular to the trajectory of movement and preferably to the second direction 4b. It should be emphasized that, as explained above, in this centering sub-phase the limit switch 46 passes in the deviation position ensuring said centering of the couple with respect to the surface of support and to the second direction 4b. The palletizing process includes an advancement phase in which at least the 4e flanking station handles the movement of the 10a pair of blocks 10 and then the final station 4l places it in the picking area 3b. The advancement phase includes a sliding sub-phase in which the station flanking station 4e and, if present, at least one removal station 4f provide for move the 10th pair along the movement path and in particular along the second direction 4b. At the end of the sliding sub-phase the pair 10a appears preferably at the 4h alignment station. The advancement phase therefore includes a sub-phase of alignment of the sheets of said pair 10a of blocks 10 properly performed by the alignment station 4h and for the precision from the 47 aligner. The alignment sub-phase can be performed from alignment station 4h. The alignment sub-phase can include a “parallel alignment” i.e. with respect to a direction parallel to the second direction 4b. In detail the parallel alignment is performed from the two panels 471 that enclose the pair 10a between them coming into contact with the sheets of the blocks 10 along the side parallel to the second direction 4b to the support surface. In detail, in the alignment sub-phase we have the adjustment steps, the adjustment steps, the contact and preferably the stop step. In the adjustment step, the guide 472 moves the panels 471 along the alignment axis. 47b; arranging the alignment surfaces 47a at a mutual distance equal to the extension of blocks 10 and / or 10a of pair 10a along the normal to the second direction 4b. In detail, in this step in the case of blocks 10 the panels 471 can be mutually positioned so that the distance between the surfaces 47a is equal to the second side of block 10, while it is equal to double the second side of block 10 in the case of 10th pair. In the contact step the blocks and / or the 10th pair, appropriately moved by the then handler, they advance along the second trajectory and enter between the invitation surfaces 47c (detailed in the entrance “cone” defined by them) and are thus brought between the surfaces of alignment 47a thus alienating the sheets parallel to the second direction 4b. In the eventual stop step the stop body 48 moves into the active position, stopping the advancement of the blocks 10 and / or the pair 10a and preferably making them protrude at least part of the slide 48b so as to lift at least one edge of the blocks 10 which detaches from the fifth mover. Once the alignment sub-phase is completed, the advancement phase includes a sub-phase of arrangement of at least one block 10 and / or at least one pair 10a in the collection area 3b. The disposition sub-phase may include a placement step in which at least one block 10 and / or at least one pair 10a passes from alignment station 4h to station final 4l. The arrangement sub-phase may include a lifting step of a block 10 and / or of a pair 10a of blocks 10 appropriately executed from the final station 4h and for the precision from lifter 48. In this lifting step the lifter 48 places the block 10 and / or the pair 10a in the area of collection 3b. In detail he lifts the pair 10a of blocks 10 along the axis of lift 48a. Optionally in this lifting step the lifter 48 defines an assembly of two pairs 10a by placing a pair 10a of blocks 10 in the picking area 3b on top of another pair 10a previously placed in said sampling area 3b. It is highlighted that, in the case of stopping steps in the alignment sub-phase, the sub-phase lifting may initially include the unlocking step in which the passage of the body of stop 48 goes into passive position so that blocks 10 and / or of pair 10a are placed in contact with the fifth mover which moves them along the second direction placing them in the final station 4l. It should be noted that the arrangement sub-phase is performed only after the alignment sub-phase. In particular, between the alignment sub-phase and the lifting step there is a step of placement in which block 10 and / or pair 10a are moved along the trajectory of movement and in particular along the second direction 4b (i.e. it aligns, translates and then it rises). In placement step 48 block 10 and / or pair 10a are moved along the second direction 4b and brought into contact with plate 483 and in detail with the surface of interception 489a. The arrangement sub-phase may include a lifting step appropriately concluded at the end of the i.e. with block 10 and / or pair 10a resting on the surface of interception 489a. The palletizing process finally includes a final phase in which the group of stacking 3 arranges blocks 10 from picking area 3b into a palletizing area 3a and in particular on a pallet placed in said palletizing area 3a. This final phase includes a spreading sub-phase in which the gripping bodies 312 are mutually spaced along the 3d implementation axis and, in detail, along the additional actuation axis 3e; a first positioning sub-phase in which the arm robotic 32 places the empty gripper 31 (i.e. without blocks 10) in correspondence with the area of 3b picking; a gripping sub-phase in which the gripper 31 grips at least one pair 10a of blocks 10; and a second positioning sub-phase in which the robotic arm 32 has the gripper 31 loaded (i.e. with at least one block 10); and a release sub-phase of at least one pair 10a in the palletizing area 3a in the palletizing area 3a and especially on the pallet. In the first positioning sub-phase the robotic arm 32, using the mechanical joints 32b and the hinge 34, moves the gripper 31 with the gripping bodies 312 reciprocally spaced (along the actuation axis 3 and appropriately the additional axis of implementation 3e) bringing them to the sampling area 3b and in particular arranging the pair 10a between the gripping surfaces 312a. In the gripping sub-phase, the gripper 31 grips a pair 10a of blocks 10. In detail the bodies 312 are moved along the 3d actuation axis and, if necessary, along the additional actuation axis 3e so that a first pair of gripping bodies 312 grasp the first block 10 of the pair and the second pair of gripping bodies 312 grasp the second block 10. In the second positioning sub-phase the robotic arm 32 moves the gripper 31 and then the 10th pair in the 3rd palletizing area. In the release sub-phase the gripper 31 releases the pair 10a of blocks 10 into the area of palletizing 3a. In some cases, exploiting the independent motion between the pairs of gripping bodies 312 the first pair of bodies 312 releases the first block 10 at a first point of the area of palletizing 3a; then the arm 32 moves the gripper 31 arranging it in a second point of the palletizing area 3a different from the first; and, finally, the second pair of bodies 312 releases the second block 10 at said second point of the area of palletizing 3a. It should be noted that, in the case in which the said set of two is present in the sampling area 3b 10a couples; the final phase initially includes a sub-phase of replacement of grip bodies 312 of the gripper 31; while in the gripping sub-phase the gripper 31 grips the entire assembly and in the release sub-phase the gripper 31 releases the entire piece into the palletizing area 3a together (i.e. both 10a pairs) or first only the first two 10 blocks and then the two second blocks 10. In the replacement sub-phase the robotic arm 32 moves the gripper 31 in correspondence of warehouse 35 and in particular of an empty storage location; constraint 315 switches to release configuration allowing the release of the gripping bodies 312 from the gripper 31; the robotic arm 32 moves the gripper 31 in correspondence with the storage station equipped with the bodies 312 to be picked up and placed next to the hook 315a in the holding 315b; and therefore the constraint 315 passes into the engagement configuration, binding the gripping bodies 312 integrally with the gripper 31. Palletizing line 1 and therefore the palletizing process according to the invention achieves important advantages. In fact, thanks to the possibility of moving a 10th or even two pairs 10a pairs, allow to speed up the palletization of the 10 blocks and therefore to increase production speed and reduce costs. It is highlighted how this function is achieved without degrading the palletization and thus ensuring both the correct positioning of the blocks 10, both an orientation of the blocks 10 on the free pallet even if taken from the gripper 31 in pairs 10a or individually, both the perfect alignment of the sheets of each block 10. Other advantages are given by the particular constraint 315 which, defining a passage from the commitment configuration to the active release configuration and then only executed following a external command and therefore the activation of the actuator, allows to eliminate the risk of detachment of the 312 socket bodies and therefore of the risks arising from it. A particular advantage is given by having separated into two successive stations 4h and 4l the alignment of the sheets 11 and the lifting of the blocks 10 allowing to manipulate with the same line objects of different sizes between them such as, for example, the 10a pairs and the single blocks 10. This emphasis is given by the detail that does not interfere with the movement of blocks and / or pairs 10a. The invention is susceptible to variations within the scope of the defined inventive concept from the claims. For example, in the first movement subphase the 4d movement stations they exclusively provide for the advancement of the first block 10 along the first direction 4a and without any rotation. Alternatively, in the first movement sub-phase the 4d movement stations take care of moving the first block 10 along the first direction 4a by rotating it 90° (for example using only the second beat 45). In another example, in the second movement subphase the stations of 4d movement provides for it to be rotated preferably by 180 (using both the second is the third measure 45) or by rotating it 90° (for example by using only the second bar 45). In these two examples the second 45'' measure is preferably in the configuration of juxtaposition. The first direction 4a can be parallel to the second direction 4b and possibly to the third direction 4c. The handling group 4 can be without lifting station 4l. Therefore the alignment station 4h is configured to place blocks 10 and / or pair 10a in the area of sample 3b. These examples can be implemented both with each other and with what is described above. In this context all the details are replaceable by equivalent elements and the materials, shapes and the dimensions can be any.

Claims

defining an area an area of or or or entrance side of a control unit configured to command in order or ▪ ▪ ▪ or or flush with the said entrance side placing itself flush with the said entrance side. entrance side of said flanking station