Variable capacity storage device

Abstract

A variable capacity storage for cylindrical articles (2) of the tobacco processing industry; the storage (1) comprises a conveyor assembly (3) provided with a first conveyor (6) and a second conveyor (7) and configured to convey articles (2) along a path (P) from an input station (4) to an output station (5); a transfer conveyor assembly (8) configured to convey the articles (2) from the first conveyor (6) to the second conveyor (7); a moving assembly for moving the transfer conveyor assembly (8) to vary the length of the path (P) and thus the capacity of the storage (1); an unloading device (5 ') comprising a third conveyor (5' ') for transferring the articles (2) to a machine (M) arranged downstream of the storage (1), a compensation area (CA) for containing a variable number of articles (2), and a control unit (CU) for adjusting the speed of the third conveyor (5' ') and the speed of the second conveyor (7).

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims the priority of Italian patent application No. 102023000018318 filed on September 6, 2023, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] The present invention relates to a variable capacity storage element, a method for conveying articles, in particular cylindrical articles for the tobacco processing industry, and an apparatus. Background Art

[0004] In the tobacco processing industry, variable capacity stores for cigarettes of the type described in patent EP 581 143 are known. These stores comprise a store path of variable length having two conveying parts wound around each other on a common axis, the conveying parts having turns of the same inclination, and a deflection device configured to move cigarettes from one part to the other and movable along the two parts so as to vary the total length of the store path.

[0005] EP838165 discloses a variable capacity storage comprising two screw conveyors arranged one above the other and connected by an intermediate element configured to transfer the product from the upper conveyor to the lower conveyor by gravity alone. Both conveyors are operated pneumatically.

[0006] This type of storage element suffers from several disadvantages, of which the following are worth mentioning.

[0007] The particular arrangement of two conveyor sections, one inside the other, not only makes the construction and design of the storage element particularly complex and expensive, but also makes maintenance operations very complicated.

[0008] Furthermore, the storage element is not very ductile, since it is not possible to provide an input station and an output station for cylindrical objects arranged in the desired position (e.g. one at the bottom and one at the top). More particularly, according to EP581143 and EP838165, the output of the objects is located at the bottom, a position that is not particularly convenient for the layout of existing machines that may be found downstream of the storage element (e.g. cigarette packing machines or a combination for combining filters and tobacco rods).

[0009] Furthermore, please note that pneumatic conveyors (e.g., such as those disclosed in EP838165) are not so delicate to articles (especially cigarettes). In fact, this type of conveyor can not only relatively easily damage the articles, but can also cause particles (e.g., tobacco) to separate and disperse from the articles themselves.

[0010] Furthermore, conveying relatively delicate items, such as cigarettes, by gravity alone may result in damage to the items and / or jams.

[0011] WO2019073447A1 discloses a variable capacity storage for articles for the tobacco processing industry, comprising a conveyor assembly comprising a first conveyor having a substantially spiral shape; a second conveyor having a substantially spiral shape and arranged above the first conveyor; a linear transfer conveyor designed to convey articles from the first conveyor to the second conveyor, having a variable length. This type of storage has some drawbacks, among which it is worth mentioning that it is difficult to precisely regulate the flow of articles leaving the storage (and therefore supplied to the subsequent machine); the system is quite strict with respect to the direction of the articles leaving the storage (hence, it does not provide the possibility of correctly utilizing the space available for positioning the subsequent machine). Summary of the invention

[0012] The object of the present invention is to provide a variable capacity storage element, a method and an apparatus for conveying articles, in particular cylindrical articles for the tobacco processing industry, which are designed to at least partially overcome the disadvantages of the prior art and at the same time are easy and economical to manufacture and implement.

[0013] According to the present invention, there is provided a variable capacity storage element, a method and an apparatus for conveying articles, in particular cylindrical articles for the tobacco processing industry, as described in the accompanying independent claims, and preferably as described in any one of the claims directly or indirectly dependent on the preceding independent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will now be described with reference to the accompanying drawings, which show non-limiting embodiments of the invention, in which:

[0015] Figures 1 to 5 is a perspective view of a portion of a storage element according to the invention in a continuously operating configuration, with some parts removed for greater clarity;

[0016] Figure 6 yes Figure 1-5 A side view of a component of a storage element;

[0017] Figure 7 yes Figure 1-5 A cross-sectional view of a detail of a storage member;

[0018] Figure 8 yes Figure 1-5 A three-dimensional view of the machine, with some details omitted for greater clarity;

[0019] Fig. 9 yes Figure 6A perspective view of a component connected to another element;

[0020] Fig.10 yes Figure 1-5 A perspective view of components of a storage element;

[0021] Fig.11 yes Figure 1-5 A perspective view of a detail of a storage member;

[0022] Fig.12 is from Fig.11 Detail of the bottom view of the stereogram;

[0023] Fig.13 yes Figure 1-5 a perspective view of a storage element; and

[0024] Fig.14 and 15 Shown on a larger scale Fig.13 Details of the storage element in two different operating configurations. DETAILED DESCRIPTION

[0025] In the figures, numeral 1 generally indicates a variable capacity storage for objects 2. The storage comprises a conveyor assembly 3 for conveying objects 2 (in particular, in bulk) from an input station 4 to an output station 5 along a path P (in particular of variable length).

[0026] In particular, the object 2 is a substantially cylindrical object, in particular an object of the tobacco processing industry. For example, the object 2 is a cigarette, a cigarette filter, a cigarette filter component (rod), a tobacco rod, a cigarette cartridge and / or a component for an electronic cigarette. According to some specific and non-limiting embodiments, the object 2 is a cigarette.

[0027] The conveyor assembly 3 includes a conveyor 6 for conveying articles 2 from an input station 4 along a section S1 of a path P; and at least a transfer conveyor assembly 8, which is configured to convey articles 2 from the conveyor 6 along a transfer section IS of the path P (in particular, having a substantially linear portion), and has an input section 9, which is arranged in the area of ​​section S1 to receive articles 2 from the conveyor 6.

[0028] In particular, the articles 2 have a rectangular shape. More particularly, the conveyor assembly 3 is designed to convey the articles 2 in bulk (ie, in contact with each other and in multiple layers - see for example Figure 1 and Fig.15 ), and more particularly, conveying the articles 2 transversely (ie in a transverse direction, in particular perpendicularly to their longitudinal extension).

[0029] Advantageously, although not necessarily, the conveyor assembly 3 further comprises a conveyor 7 for conveying the articles 2 to the output station 5 along the section S2 of the path P. In these cases, the transfer conveyor assembly 8 is configured to convey the articles 2 from the conveyor 6 to the conveyor 7 along a transfer section IS (in particular, a substantially linear transfer section) of the path P, and has an input 10 arranged in the region of the section S2 for feeding the articles to the conveyor 7.

[0030] In particular, conveyors 6 and 7 (and in some cases, transfer conveyor assembly 8) are endless conveyors.

[0031] According to some non-limiting embodiments, a transfer conveyor assembly 8 is disposed between conveyor 6 and conveyor 7 .

[0032] Advantageously, although not necessarily, the transfer conveyor assembly 8 is arranged on the side of the conveyors 6 and 7 .

[0033] Advantageously, although not necessarily, the transfer conveyor assembly 8 is configured to convey the articles 2 upwardly.

[0034] The section S1 (in particular, it has a substantially spiral shape) extends from the input station 4 to the input part 9. The section S2 (in particular, it has a substantially spiral shape) extends from the output part 10 to the output station 5.

[0035] According to some non-limiting embodiments, the storage element 1 further comprises a moving assembly 12 for moving the transfer conveyor assembly 8 so as to move the input portion 9 and the output portion 10 respectively along the conveyor 6 and the conveyor 7. In particular, the moving assembly 12 is also (therefore) configured to change the length of the transfer section IS and of the sections S1 and S2.

[0036] It should be noted that by lengthening sections S1 and S2, the length of the path P (and therefore the capacity of the storage element 1) increases; by shortening sections S1 and S2, the length of the path P (and therefore the capacity of the storage element 1) decreases.

[0037] Specific reference Fig.13 , 14and 15, the storage element 1 also includes an unloading device 5', which is arranged in the area of ​​the output station 5 and includes: at least a conveyor 5", which is configured to transfer the articles 2 to a machine M arranged downstream of the storage element 1; a compensation area CA, which is arranged downstream of the conveyor 7 and upstream of the conveyor 5" (in particular, between the conveyor 7 and the conveyor 5") and is configured to accommodate a variable number of articles 2 (so as to at least partially compensate for the capacity difference between the conveyor 7 and the conveyor 5"); and a control unit CU, which is configured to adjust the operating speed of the conveyor 5" according to the request of the machine M, in particular, to adjust the operating speed of the conveyor 7 according to the degree of filling of the compensation area CA (i.e., how filled it is, in particular relative to its total capacity).

[0038] Tests have shown that, in this way, it is possible to precisely regulate the flow of articles 2 to the machine M by supplying it with exactly the quantity of articles it requires.

[0039] In this case, it should be noted that the conveyor assembly 3 itself can be used to compensate for the different operating speeds (and / or momentary stops) of a machine designed to feed articles 2 to an input station 4 (e.g., a machine for producing articles 2 - of a known type and not shown) and a machine M (e.g., constructed to combine articles 2 with other components to produce a final product or packaged article 2).

[0040] Surprisingly, therefore, tests have shown that the presence of the unloading device 5 ′ significantly improves the supply to the machine M (and therefore the operation of the machine M itself).

[0041] In particular, the compensation area CA comprises (and more particularly is) a compensation chamber of variable volume.

[0042] In particular, in use, when the compensation area CA fills (beyond a certain limit), the control unit CU reduces the number of objects 2 (per unit time) fed to the unloading device 5'. Additionally or alternatively, vice versa, when the compensation area CA becomes empty (beyond a certain limit), the control unit CU increases the number of objects 2 (per unit time) fed to the unloading device 5'.

[0043] In particular, in use, when the machine M requires fewer articles 2, the control unit CU reduces the speed of the conveyor 5", and when the machine M requires more articles 2, the control unit CU increases the speed of the conveyor 5".

[0044] Advantageously, although not necessarily, the conveyor 7 is configured to convey the articles 2 in a direction D1 toward the unloading device 5' (in particular, toward the compensation area CA; more particularly, to the compensation area CA); the conveyor 5" is configured to convey the articles 2 from the compensation area CA in a second direction D2 different from the direction D1 (in particular, at least partially opposite to the first direction D1).

[0045] In this way, it is possible to place the machine M in a more suitable location and thus reduce the overall size.

[0046] The unloading device 5' comprises a feed conveyor 7', which is configured to receive items 2 from the conveyor 7 and feed the items 2 to the compensation area CA (in particular, in the direction D1); the control unit CU is configured to adjust the operating speed of the feed conveyor 7' (in particular, the conveyor 7) according to the degree of filling of the compensation area CA.

[0047] In particular, in use, when the compensation area CA fills (beyond a certain limit), the control unit CU reduces the speed of the feed conveyor 7'. Additionally or alternatively, vice versa, when the compensation area CA becomes empty (beyond a certain limit), the control unit CU increases the speed of the feed conveyor 7'.

[0048] Advantageously, although not necessarily, the unloading device 5 ′ is configured to feed the machine M with objects 2 in bulk at a controlled height, in particular ranging from a maximum height to a minimum height.

[0049] According to some non-limiting embodiments, the unloading device 5' comprises a detection system DS configured to detect the level of the objects 2 in the compensation area CA and connected to said control unit CU. The control unit CU is configured to adjust the operating speed of the feed conveyor 7', in particular the conveyor 7, according to the data detected by the detection system DS, in particular according to the level of the objects in the compensation area CA. In particular, the detection system DS comprises at least a deformable element 54 configured to change its position in the compensation area CA according to the level of the objects in the compensation area CA, and a sensor 55 configured to detect the position of the deformable element 54 (for example, the sensor 55 is a proximity sensor).

[0050] This structure is particularly simple and practical.

[0051] For example, the deformable element 54 is a deformable strip or a deformable wall (comprising a plurality of panels hinged to each other).

[0052] Advantageously, although not necessarily, the unloading device 5 ′ comprises a transfer channel 56 for bringing the objects 2 from the compensation area CA to the conveyor 5 ″, the transfer channel 56 being arranged below the compensation area CA.

[0053] In this way, the objects 2 are brought onto the conveyor 5" in a simple (inexpensive) and effective manner.

[0054] In particular, the transfer channel 56 is substantially vertical.

[0055] Advantageously, although not necessarily, the unloading device 5' has a leveling wall 58 and an output channel 57, wherein the leveling wall 58 is arranged above the conveyor 5" and is configured to limit the height of a large number of articles 2 arranged on the conveyor 5", and the output channel 57 is connected to the transfer channel 56 and is delimited at the bottom by the conveyor 5" and at the top by the leveling wall 58.

[0056] Tests have shown that this construction makes it possible to obtain a particularly constant supply to the machine M in a simple and inexpensive manner.

[0057] According to some non-limiting embodiments (e.g., Fig.11 and 12 ), the conveyor assembly 3 includes an engagement device 9', which is configured to allow the article 2 to be transferred from the conveyor 6 to the transfer conveyor assembly 8 and to be movable on the conveyor 6. In some cases, the conveyor assembly 3 also includes an engagement device 10', which is configured to allow the article 2 to be transferred from the transfer conveyor assembly 8 to the conveyor 7 and to be movable on the conveyor 7.

[0058] In particular, the engaging device 9 ′ comprises at least two centering elements 9 ″ which are arranged on opposite sides of the conveyor 6 in order to reduce lateral movements of the engaging device 9 ′ relative to the conveyor 6 .

[0059] In particular, the engaging device 10 ′ comprises at least two centering elements 10 ″ which are arranged on opposite sides of the conveyor 7 in order to reduce lateral movements of the engaging device 10 ′ relative to the conveyor 7 .

[0060] Each centering element 9 ″ comprises at least a first roller (in particular, at least a roller bearing), and / or each centering element 10 ″ comprises at least a second roller (in particular, at least a roller bearing).

[0061] Tests have shown that in this way it is possible to obtain a more stable and reliable connection (more precise relative position) of the transfer conveyor assembly 8 to the conveyor 6 and / or to the conveyor 7 and a reduction in jamming incidents.

[0062] Advantageously, although not necessarily, the conveyor assembly 3 comprises both an engaging device 9 ′ and an engaging device 10 ′.

[0063] According to some preferred but non-limiting embodiments, the engaging means 9' and the engaging means 10' are substantially identical. In this regard, it should be noted that Fig.11 and 12 Both an engagement device 9 ′ and an engagement device 10 ′ are shown.

[0064] In particular, the moving assembly 12 ( Figure 1-5 ) is configured to move the transfer conveyor assembly 8 so as to move the engaging device 9' and / or the engaging device 10' along the conveyor 6 and the conveyor 7, respectively.

[0065] Advantageously, although not necessarily, the transfer conveyor assembly 8 has at least a propulsion device 11 configured to (at least partially) accompany the articles 2 along the middle portion of the transfer section IS (together with the articles). In particular, the middle portion of the transfer section IS extends upwards, more particularly, is substantially vertical.

[0066] According to some non-limiting embodiments, the propulsion device 11 comprises (is) a rectangular element closed on itself. In particular, the propulsion device 11 comprises (is) a belt and / or a chain.

[0067] Due to the presence of the propulsion device 11, the risk of jamming of the articles 2 along the transfer section IS and the risk of damaging the articles 2 are reduced when the articles 2 are conveyed along the transfer section IS in use. Due to the propulsion device 11, it is possible to feed the articles 2 from the conveyor 6 arranged at the bottom to the conveyor 7 arranged at the top.

[0068] Advantageously, although not necessarily, the propulsion device 11 is configured to move (at least partially) the objects 2 along (with them) the transfer section IS.

[0069] In particular, the transfer section IS extends between the input 9 and the output 10 (more particularly, from the input 9 to the output 10 ).

[0070] The input section 9 and the output section 10 are movable along the conveyor 6 and the conveyor 7, respectively.

[0071] In particular, each conveyor 6 and each conveyor 7 has at least one corresponding turn (e.g., spiral and / or loop). Advantageously, although not necessarily, each conveyor 6 and each conveyor 7 has a plurality of corresponding turns (loops). In other words, each conveyor 6 and each conveyor 7 is wound around itself so as to be provided with a plurality of turns (loops). More particularly, the winding direction of the conveyor 6 is opposite to the winding direction of the conveyor 7. For example, if the winding direction of the conveyor 7 is clockwise (as seen from above), the winding direction of the conveyor 6 (as seen from above in general) is counterclockwise.

[0072] Advantageously, although not necessarily, the conveyor 6 has a plurality of first turns (loops) and the second conveyor 7 has a plurality of second turns (loops) having the same radius and the same distance as the first turns.

[0073] According to a specific non-limiting embodiment, the conveyor 6 has a plurality of turns of constant radius and distance; the conveyor 7 has a plurality of turns of constant radius and distance. More precisely, the conveyor 6 has at least a section having a (cylindrical) spiral shape with constant radius and distance; the conveyor 7 has at least a section having a (cylindrical) spiral shape with constant radius and distance.

[0074] According to an alternative and not shown embodiment, each turn comprises two curved end portions and two linear central portions. In these cases, for example, the turn extends around two rollers with parallel axes (see, for example, EP738478 of the applicant). Figure 1 ).

[0075] Advantageously, although not necessarily, the transfer conveyor assembly 8 comprises a pulley 13 (or alternatively, a suitably shaped, such as a "U" shaped, sliding surface) and a pulley 14 around which the propulsion device 11 is partially wound.

[0076] In particular, the storage element 1 (more precisely, the transfer conveyor assembly 8) comprises at least an operating assembly (of a type known per se and not shown) for rotating at least one of the pulleys 13 and 14. More particularly, it should be noted that the transfer conveyor assembly 8 is constructed in such a way that the output 10 is arranged approximately in the region (more precisely, at the height) of the pulley 14, while the input 9 is arranged in the region (more precisely, at the height) of the pulley 13 (or in the region of the sliding plane replacing the pulley 13).

[0077] According to some non-limiting embodiments, the aforementioned operating assembly comprises (is) a motor and / or a kinematic mechanism connected to other components of the storage element 1 .

[0078] Advantageously, although not necessarily, the storage element 1 (in particular, the transfer conveyor assembly 8; more particularly, the moving assembly 2) includes an actuator assembly (which is of a known type and not shown) for moving the pulley 13 and the pulley 14 towards and away from each other, in particular in the direction of the longitudinal extension (of the middle part) of the transfer section IS (more particularly, in a substantially vertical direction).

[0079] According to some non-limiting embodiments, the aforementioned actuator assembly comprises (is) a motor and / or a kinematic mechanism connected to other components of the storage element 1 .

[0080] In particular, the aforementioned actuator assembly is configured to change the distance between the pulley 13 and the pulley 14 in accordance with (proportionately) the difference between the speeds at which the conveyors 6 and 7 convey the articles 2. More particularly, the actuator assembly is configured to change the distance between the pulley 13 and the pulley 14 in proportion to the difference between the speeds at which the conveyors 6 and 7 convey the articles 2.

[0081] According to some non-limiting embodiments, the propulsion device 11 includes an active section AT of variable length, the active section AT extending along (the middle part of) the transfer section IS between the pulleys 13 and 14; and a passive section PT arranged on the opposite side of the pulleys 13 and 14 relative to the active section AT (in other words, the pulleys 13 and 14 are arranged between the active section AT and the passive section PT). The passive section PT extends between the pulleys 13 and 14 and partially surrounds at least another pulley 15 of the transfer conveyor assembly 8, which also includes a further actuator assembly (also known and not shown) for moving the pulleys 15 (away from and towards the transfer section IS).

[0082] Advantageously, the relative movement between pulleys 13 and 14 and the movement of pulley 15 are linked so that one compensates the other (and the propulsion device 11 always remains correctly stretched). In other words, when the active section AT shortens a given length, the passive section PT lengthens said given length, and vice versa (compensating each other).

[0083] In some non-limiting cases, the further actuator assembly comprises a kinematic mechanism that transmits the relative movement (more precisely, displacement) of pulleys 13 and 14 to pulley 15 according to a defined ratio (eg 1 to 1).

[0084] In particular, the transfer conveyor assembly 8 comprises at least a pulley 15 and at least two fixed pulleys (known and not shown - usually arranged one above the other). More precisely, although not necessarily, the pulley 15 is arranged between the two fixed pulleys (at an intermediate height) and is movable towards and away from the fixed pulleys (horizontally). The relative movement between the pulley 15 on the one hand and the fixed pulleys on the other hand compensates the relative movement between the pulley 13 and the pulley 14 (when the active section AT is shortened, by lengthening the passive section PT and vice versa).

[0085] According to some specific and non-limiting embodiments (similar to the one shown here), the transfer conveyor assembly 8 comprises at least two pulleys 15 and at least three fixed pulleys (known and not shown). In these cases, the relative movement between the pulleys 15 on the one hand and the fixed pulleys on the other hand compensates the relative movement between the pulleys 13 and 14 (by lengthening the passive section PT when the active section AT is shortened and vice versa).

[0086] Advantageously, although not necessarily, the transfer conveyor assembly 8 comprises at least a further propulsion device 16, which faces the propulsion device 11 and is configured to move along the middle portion of the transfer section IS (in particular, in cooperation with the propulsion device 11; more precisely, at the same speed as the propulsion device 11). In particular, the propulsion device 11 and the propulsion device 16 are designed to sandwich the article 2 between them and to accompany (move) the article 2 at least partially along the transfer section IS.

[0087] More precisely, the propulsion device 16 comprises (is) a belt and / or a chain.

[0088] Advantageously, although not necessarily, the transfer conveyor assembly 8 comprises a motor (an electric motor of a known type and not shown) to operate (rotate) one of the pulleys 16', and a different motor (an electric motor of a known type and not shown) to operate (rotate) one of the pulleys 14 and 13 (in particular the pulley 14). In particular, the storage element 1 (more precisely, the transfer conveyor assembly 8) comprises a control unit configured to operate the two motors in a coordinated manner so that the speed of the propulsion device 11 and the speed of the propulsion device 16 are identical to each other (even when the pulleys 13 and 14 move away from or towards each other). For example, in use, when the pulleys 13 and 14 move away and the rotation speed of the pulley 16' remains constant (so as not to change the movement speed of the items 1 along the section IS), the rotation speed of the pulley 14 is reduced.

[0089] According to some alternative and non-limiting embodiments, the propulsion device 16 is wound around a pair of pulleys 16' (one of which is Figure 1-6 In the figure, the other Fig.13 In particular, one of the pulleys 16' is connected to at least one of the pulleys 14 and 13 by means of a kinematic mechanism (known and not shown), which (connected to the motor) is configured to transmit the rotational movement from the pulleys 13 and 14 to the pulley 16', so that the speed of the propulsion device 11 and the speed of the propulsion device 16 are identical to each other.

[0090] Due to the push device 16, the risk of jamming of the articles 2 along the transfer section IS and the risk of damaging the articles 2 are further reduced when the articles 2 are conveyed along the transfer section IS in use. Due to the push device 16, it is also possible to improve the feeding of the articles 2 from the conveyor 6 arranged at the bottom to the conveyor 7 arranged at the top.

[0091] According to some non-limiting embodiments, the transfer conveyor assembly 8 comprises a plate 17 on which the aforementioned pulleys (particularly, the pulley 13 and the pulley 14, and, if necessary, the pulley 15, the pulley 16' and the fixed pulley) are mounted. In particular, the plate 17 has a slot 18, which serves as a guide for the pulley 13 and the pulley 14. In other words, in use, the pulley 13 and the pulley 14 each slide along the respective slot 18.

[0092] Alternatively or additionally, the transfer conveyor assembly 8 comprises two flat supports 19 on which the pulleys 13 and 14 are respectively (rotatably) mounted. More precisely, the aforementioned actuator assembly (not shown) is configured to move the flat supports 19.

[0093] In some cases, the flat support 19 may slide along the slot 18, or be movable along a linear guide. Movement of the flat support 19 may be obtained, for example, by means of a linear actuator and / or a kinematic mechanism connected to other components of the storage 1 .

[0094] Additionally or alternatively, the plate 17 has slots 20 which act as guides for the pulley(s) 15. In other words, the pulley(s) 15 slide along the respective slots 20 in use.

[0095] According to an alternative non-limiting embodiment, the pulleys 15 are mounted on respective slides movable along linear guides. The movement of these slides can be obtained, for example, by means of linear actuators and / or kinematic mechanisms connected to other components of the storage 1 .

[0096] Advantageously, although not necessarily, the engaging means 9 ′ and 10 ′ are moved in an integral manner to the respective pulleys 13 , 14 in the direction of the longitudinal extension of the transfer section IS.

[0097] According to some non-limiting embodiments, the transfer conveyor assembly 8 further comprises a deflection belt 21 arranged in the region of the pulley 13 for directing the articles 2 from the input section 9 in the transfer section IS (changing the advancement direction of the articles 2). In addition or alternatively, the transfer conveyor assembly 8 further comprises a deflection belt 22 arranged in the region of the pulley 14 for directing the articles 2 from the transfer section IS towards the output section 10 (changing the advancement direction of the articles 2).

[0098] In particular, the deflection belts 21 and 22 are movable relative to each other in a manner integral with the pulleys 13 and 14, respectively. According to some non-limiting embodiments, the deflection belts 21 and 22 are each mounted on a respective flat support 19.

[0099] Advantageously, although not necessarily, the conveyor 6 and the conveyor 7 are arranged so that one is (at least partially) above the other. In particular, the conveyor 7 is (at least partially) arranged above the conveyor 6 (and the output station 5 is arranged higher than the input station 4). By doing so, it is possible to place the output part 10 in a relatively high position relative to the input part 9.

[0100] In some non-limiting cases, the output station 5 is arranged (higher than the input 9 and) higher than the input station 4. In particular, the output station 5 is arranged higher than the output 10, which in turn is arranged higher than the input 9, which is arranged higher than the input station 4.

[0101] More precisely, (the conveyors 6 and 7 are arranged such that) the section S1 and the section S2 are substantially coaxial with each other.

[0102] According to some non-limiting embodiments, the aforementioned intermediate portion of the transfer section IS is (linear and) substantially parallel to the axis A around which the sections S1 and S2 are wound.

[0103] According to a specific non-limiting embodiment, the section IS also has two connecting portions SC1 and SC2 (the two connecting portions SC1 and SC2 are transverse to, in particular, perpendicular to, the middle portion), and the two connecting portions SC1 and SC2 extend between the middle portion of the transfer section IS and the sections S1 and S2, respectively. The transfer conveyor assembly 8 is configured to also transport the articles 2 along the connecting portions SC1 and SC2.

[0104] More precisely, although not necessarily, the connecting portions SC1 and SC2 extend substantially horizontally.

[0105] According to some non-limiting embodiments, the transfer conveyor assembly 8 comprises a conveyor having a (substantially horizontal) movable transport element in the region of the connecting portions SC1 and SC2 .

[0106] Advantageously, although not necessarily, the moving assembly 12 is configured to rotate the transfer conveyor assembly 8 about the axis A.

[0107] In use, when the moving assembly 12 rotates the transfer conveyor assembly 8 about the axis A, the input part 9 (more precisely, the engaging device 9') moves (slides) along the conveyor 6, and the output part 10 (more precisely, the engaging device 10') moves (slides) along the conveyor 7. In order for the input part 9 to follow the conveyor 6 and the output part 10 to follow the conveyor 7, the distance between the pulley 13 and the pulley 14 is changed.

[0108] Figures 1 to 5 The store 1 is shown in a continuous operating phase when it is filled. These figures illustrate the information disclosed above, namely that the rotational movement is also associated with a change in the length of the section IS (in other words a change in the distance between the pulley 13 and the pulley 14).

[0109] like Fig.10 As better shown in FIG. 1 , conveyor 6 comprises at least a motorized pulley 23 and conveyor 7 comprises at least a motorized pulley 24. Pulley 23 and pulley 24 are designed to allow a transport element 25 and a transport element 26 to move respectively along sections S1 and S2 (as well as along the corresponding return sections). Section S1 and the corresponding return sections together define a path that is closed on itself (usually an endless conveyor). Section S2 and the corresponding return sections together define a path that is closed on itself (usually an endless conveyor).

[0110] According to some non-limiting embodiments, the transmission element 25 is a belt and / or a chain. Advantageously, although not necessarily, the transmission element 25 is a chain. More precisely, the transmission element 25 is a chain such as disclosed in US6364094 and / or WO2013141807.

[0111] According to some non-limiting embodiments, the transmission element 26 is a belt and / or a chain. Advantageously, although not necessarily, the conveyor element 26 is a chain. More precisely, the transmission element 26 is a chain such as disclosed in US6364094 and / or WO2013141807.

[0112] The transport elements 25 and 26 allow delicate handling of the objects 2 .

[0113] Advantageously, although not necessarily, the conveyor 6 comprises ( Figure 7 )Guide (track) 27.

[0114] In particular, the transmission element 25 is configured to slide on the guide 27 .

[0115] According to some non-limiting embodiments, the guide 27 is provided with a recess 28, inside which the (lower) protrusion of the transmission element 25 extends. Due to this structure, the element 25 follows the guide 27 and moves along the section S1. At this point, it should be noted that the guide 27 extends along the path S1; more precisely, the guide 27 has the shape of the path S1 (and defines the path S1).

[0116] Additionally or alternatively, the conveyor 7 comprises a guide (track) 29 .

[0117] In particular, the transmission element 26 is configured to slide on the guide 29 .

[0118] According to some non-limiting embodiments, guide 29 has a structure and function similar to guide 27. Guide 29 extends along path S2; more precisely, guide 29 has the shape of path S2 (and defines path S1).

[0119] Advantageously, although not necessarily, the first centering element 9 ″ is arranged on the opposite side of the guide 27 and is substantially in contact with the guide 27 .

[0120] Additionally or alternatively, the centering element 10 ″ is arranged on the opposite side of the guide 29 and is substantially in contact with the guide 29 .

[0121] Specific reference Figure 8 According to some non-limiting embodiments, the storage element 1 also comprises a main support structure 30 , carrying conveyors 6 and 7 (more precisely, guides 27 and 29 ) and a transfer conveyor assembly 8 .

[0122] According to some non-limiting embodiments, the main support structure 30 includes a base 31 and a support column 32 protruding (vertically) from the base 31. In particular, the column 32 extends parallel to the axis A; more particularly, the column 32 extends along the axis A (in other words, the axis A is also the longitudinal axis of the column 32). More precisely, the column 31 has a vertical orientation.

[0123] According to some non-limiting embodiments, the main support structure 30 also includes a support assembly 33 and a support assembly 34, wherein the support assembly 33 is fixed on the column 32 and carries the conveyor 6 (more precisely, the guide 27), and the support assembly 34 is fixed on the column 32, is spaced apart from the support assembly 33 and carries the conveyor 7 (more precisely, the guide 29).

[0124] Furthermore, in some cases (such as the case shown here), the main support structure 30 also includes a bearing 35, in particular, the bearing 35 is inserted between the support assembly 33 and the support assembly 34 and is carried by the support assembly 33. The bearing 35 is part of the moving assembly 12. More precisely, the bearing 35 includes a fixed part 36 mounted on the support assembly 33 and a movable part 37, the movable part 37 being configured to rotate around the axis A and carrying the transfer conveyor assembly 8. In more detail, the transfer conveyor assembly 8 is mounted so as to be integral with the bearing 35 (more precisely, with the movable part 34) by means of two arms 38.

[0125] According to some non-limiting embodiments, the moving assembly 12 comprises at least a motor (of a known type and not shown) configured to move the transfer conveyor assembly 8 (more precisely, to rotate the transfer conveyor assembly 8 around the axis A). In these cases, in particular, the storage element 1 comprises a sensor (encoder - of a known type and not shown) to detect the speed difference between the conveyors 6 and 7 (more precisely, the speed difference between the motorized pulley 24 and the motorized pulley 25), and a control unit to operate the moving assembly 12 according to this difference.

[0126] Advantageously, although not necessarily, the aforementioned actuator assembly (for moving pulleys 13 and 14 towards and away from each other) comprises a kinematic mechanism (for example, a gear system with a worm) connected to the motor of the moving assembly 12 to transmit movement to pulleys 13 and 14 (in order to move them towards and away from each other) (according to a specific ratio).

[0127] Advantageously, although not necessarily, the transfer conveyor assembly 8 is configured to vary the speed at which the length of the transfer section IS changes, said speed being based on the rotational speed of the moving assembly 12 generated about the axis of rotation (see, for example, WO2019073447A1 in this regard).

[0128] According to some embodiments, the moving assembly 12 includes a mechanical connection configured to move the transfer conveyor assembly 8 (more precisely, rotate the transfer conveyor assembly 8 around the axis A) based on the speed difference between the conveyors 6 and 7 (more precisely, between the motorized pulleys 24 and 25).

[0129] Typically, in use, the store 1 is placed between a first machine (e.g. a cigarette making machine) and a machine M (e.g. a packing machine) in order to compensate for the different speeds at which the first machine feeds the articles 2 into the store 1 and at which the machine M uses the articles 2 from the store. More precisely, the store 1 comprises a control system (of which the control unit CU is part) connected to the first and second machines (for receiving information about the speeds), the control system being configured to adjust the speed of the conveyor 6 in order to adapt it to the speed of the first machine (and to adjust the speed of the conveyor 7 in order to adapt it to the speed of the machine M).

[0130] Specific reference Fig.11 and 12 According to some non-limiting embodiments, the engaging device 9' comprises a central element 42 on which, in use, the articles 2 are transferred from the first conveyor 6 to the transfer conveyor assembly 8. The centering element 9" is arranged on the opposite side of the central element 42 (and is substantially integral with the central element 42).

[0131] Additionally or alternatively, the engaging device 10' comprises a central element 43 on which, in use, the articles 2 are transferred from the transfer conveyor assembly 8 to the second conveyor 7. The centering element 10" is arranged on the opposite side of the central element 43 (and is substantially integral with the second central element 42).

[0132] In this way, tests have shown that the relative position of the transfer conveyor assembly 8 (particularly the engagement means 9 ′ and 10 ′) with respect to the conveyors 6 and 7 is more stable and precise.

[0133] Advantageously, although not necessarily, the engagement device 9' comprises at least adjustment means for adjusting the position of the centering elements 9" relative to the conveyor 6, in particular relative to the guide 27. In particular, in this way it is possible to adjust the position of the centering elements 9" so that they are in contact with the guide 27.

[0134] In addition or alternatively, the coupling device 10' comprises at least an adjustment device for adjusting the position of the centering element 10" relative to the conveyor 7 (in particular relative to the guide 29). In particular, in this way, the position of the centering element 10" can be adjusted so that the centering element 10" is in contact with the guide 29.

[0135] According to a non-limiting embodiment, adjustment means are provided for each centering element 9 ″ and for each centering element 10 ″.

[0136] In some non-limiting cases, each adjustment device includes (is) an eccentric (the eccentric can be operated, for example, by means of a screwdriver or the like).

[0137] Advantageously, although not necessarily, the central element 42 has at least a distal portion 44 relative to the transfer conveyor assembly 8 (ie, is arranged distally relative to the transfer conveyor assembly 8 ) which tapers toward the conveyor 6 .

[0138] Optionally, additionally or alternatively, the central element 43 has at least a distal portion 45 relative to the transfer conveyor assembly 8 (ie is arranged distally relative to the transfer conveyor assembly 8 ), which tapers towards the second conveyor 7 .

[0139] In this way, the objects 2 are more easily transferred from and to the transfer conveyor assembly 8, thereby reducing the risk of jams at the same time.

[0140] According to some non-limiting embodiments, the central element 42 acts as a slide.

[0141] Advantageously, although not necessarily, the transport element 25 , in particular a belt and / or a chain, is configured to slide along at least the section S1 and has at least a recess 46 , in particular at least two recesses 46 , extending longitudinally along the transport element 25 .

[0142] Additionally or alternatively, the transport element 26 is configured to slide along at least the section S2 and has at least a recess 47 , in particular at least two recesses 47 , which extend longitudinally along the transport element 26 .

[0143] In particular, the first central element 42 has at least teeth 48 (more particularly at least two teeth) which protrude on opposite sides relative to the transfer conveyor assembly 8 (particularly from the distal portion 44 ) and in particular extend at least partially within the recess 46 .

[0144] Additionally or alternatively, the central element 43 has at least two teeth 49 which project on opposite sides relative to the transfer conveyor assembly 8 (in particular, from the distal portion 45 ) and in particular (each) extend at least partially within the (corresponding) recess 46 .

[0145] In this way, articles 2 are more easily transferred to and from the transfer conveyor assembly 8 and the risk of jams is reduced.

[0146] Advantageously, although not necessarily, each tooth 48 and each tooth 49 tapers towards its free end (in particular, away from the transfer conveyor assembly 8 ).

[0147] Advantageously, although not necessarily, the engagement device 9' comprises at least a lower roller 50 (in particular a bearing) which is arranged in contact with the conveyor 6 (in particular, in contact with the transmission element 25; in particular, arranged between the central element 42 and the conveyor 6) and is configured to help the first engagement device 9' to slide on the first conveyor 6. In particular, the lower roller 50 has an axis of rotation transverse to the section S1.

[0148] Tests have shown that in this way the sliding of the engagement means 9 ′ and 10 ′ is better and the risk of clogging is reduced.

[0149] Additionally or alternatively, the engagement device 10' comprises at least a lower roller 51 (in particular a bearing) which is arranged in contact with the conveyor 7 (in particular, in contact with the transmission element 26; in particular, arranged between the central element 43 and the conveyor 7) and is configured to help the second engagement device 10' to slide on the second conveyor 7. In particular, the lower roller 51 has a rotation axis transverse to the section S2.

[0150] According to some non-limiting embodiments, the joining device 9' comprises at least two lower rollers 50, which are offset relative to each other (and / or staggered, in particular with respect to the position along the section S1). In addition or alternatively, the joining device 10' comprises at least two lower rollers 51, which are offset relative to each other (and / or staggered, in particular with respect to the position along the section S2).

[0151] Tests have shown that in this way the sliding of the engagement means 9' and 10' is surprisingly smoother (with less vibrations) and the risk of jamming is reduced. This behavior is particularly evident when the transmission elements 25 and 26 have irregular surfaces (for example, they are chains).

[0152] Presumably, this result is due to the fact that, with this configuration, the lower rollers 50 (and / or 51 ) are not simultaneously located in the recesses (discontinuities) of the transport element 25 (and / or 26 ).

[0153] Advantageously, although not necessarily, the engaging device 9' comprises at least adjustment means for adjusting the position of the lower roller 50 relative to the conveyor 6, in particular relative to the transmission element 25. Additionally or alternatively, the engaging device 10' comprises at least adjustment means for adjusting the position of the lower roller 51 relative to the conveyor 7, in particular relative to the transmission element 26.

[0154] In particular, in this way it is possible to adjust the position of the lower roller(s) 50 so that the lower roller 50 / the lower rollers 50 are in correct contact with the transport element 25, and / or to adjust the position of the lower roller(s) 51 so that the lower roller 51 / the lower rollers 51 are in correct contact with the transport element 26.

[0155] According to a non-limiting embodiment, adjustment means are provided for each lower roller 50 and each lower roller 51 .

[0156] In some non-limiting cases, each adjustment device includes (is) an eccentric (the eccentric can be operated, for example, by means of a screwdriver or the like).

[0157] Advantageously, although not necessarily, the conveyor assembly 3 comprises a hinge 52 arranged between the engagement device 9' and the transfer conveyor assembly 8 and configured to allow the engagement device 9' to pivot relative to the transfer conveyor assembly 8 about a respective pivot axis (in particular, transverse to the section S1).

[0158] Additionally or alternatively, the conveyor assembly 3 comprises a hinge 53 which is arranged between the engagement device 10' and the transfer conveyor assembly 8 and is configured to allow the engagement device 10' to pivot relative to the transfer conveyor assembly 8 about a corresponding pivot axis (in particular, transverse to the section S1).

[0159] Also in this case, surprisingly, a smoother movement of the objects 2 and a reduction in the risk of jamming were observed.

[0160] The storage element 1 according to the invention offers several advantages over the prior art. Among other things, it should be noted that in this way it is possible to have a relatively uncomplicated structure, which allows relatively simple maintenance operations. Furthermore, the storage element 1 is particularly flexible, since it is also possible to have an output station at the top (a particularly convenient location for the layout of the current machine) and to be very delicate in handling the items 2. The connection of the transfer conveyor assembly 8 to the conveyors 6 and 7 is stable and reliable. The risk of obstructions of the items 2 and / or of these obstructions being large and / or of damage to the items 2 is also reduced.

[0161] Unless explicitly stated otherwise, the contents of the references (articles, texts, patent applications, etc.) described above are hereby fully cited for complete disclosure. In particular, the references described above are hereby incorporated by reference.

[0162] According to a further aspect of the invention, there is also provided a device (for the tobacco processing industry) comprising a storage element 1 as described above and a machine M. Advantageously, although not necessarily, the device also comprises a first machine (for example, a machine for producing cigarettes); in these cases, the storage element 1 is arranged between the first machine and the machine M.

[0163] According to a further aspect of the invention, there is provided a method for conveying articles 2, in particular substantially cylindrical articles (more particularly articles of the tobacco processing industry), from an input station 4 to a machine M along a path P having a variable length through an output station 5;

[0164] The method comprises:

[0165] a first conveying step, during which at least the conveyor 6 conveys the objects 2 from the input station 4 along a section S1 of the path P;

[0166] a second conveying step, during which the conveyor 7 conveys the objects 2 to the output station 5 along a section S2 of the path P arranged downstream of the section S1 ;

[0167] a transfer step, during which the transfer conveyor assembly 8 transfers the articles 2 from the conveyor 6 to the conveyor 7 along the transfer section IS of the path P and has an output 10, which is arranged in the region of the second section S2, for feeding (and the output 10 feeds) the articles 2 to the second conveyor 7, and an input 9, which is arranged in the region of the section S1, for receiving (and the input 9 receives) the articles 2 from the conveyor 6;

[0168] The method also includes a moving step, which is carried out at least partially simultaneously with the transfer step (in particular, at least partially simultaneously with the first conveying step), and during the moving step, the moving component 12 converts the transfer conveyor component 8 so as to move the input part 9 and the output part 10 along the conveyor 6 and the conveyor 7 respectively.

[0169] The unloading device 5' is arranged in the area of ​​the output station 5 and comprises: at least a third conveyor 5", which transfers the articles 2 to the machine M; a compensation area CA, which is arranged downstream of the conveyor 7 and upstream of the conveyor 5" (between the conveyors 7 and 5") and contains a variable number of articles 2 (so as to at least partially compensate for the capacity differences between the conveyors 7 and 5"); and a control unit CU, which adjusts the operating speed of the conveyor 5" according to the request of the machine M and adjusts the operating speed of the conveyor 7 according to the degree of filling of the compensation area CA.

[0170] Advantageously, although not necessarily, the conveyor 7 conveys the objects 2 in direction D1 towards the unloading device 5', in particular towards the compensation area CA; the conveyor 5" conveys the objects 2 from the compensation area CA in a direction D2 different from (in particular at least partially opposite to) direction D1.

[0171] According to some non-limiting embodiments, the method comprises a feeding step during which the feed conveyor 7' receives the objects 2 from the conveyor 7 and feeds them to the compensation area CA (in particular, in the direction D1). The control unit CU adjusts the operating speed of the feed conveyor 7' according to the degree of filling of the compensation area CA.

[0172] In particular, the articles 2 have a rectangular shape. More particularly, the conveyor assembly 3 and the unloading device 5' are arranged in large numbers (ie, in contact with each other and in several layers - see, for example, Figure 1 and Fig.15 The objects 2 are conveyed longitudinally (enlarged view of the upper part) and transversely (ie in a transverse direction, in particular perpendicularly to their longitudinal extension).

[0173] Advantageously, although not necessarily, the unloading device 5 ′ supplies the objects 2 to the machine M in bulk at a controlled height, in particular ranging from a maximum height to a minimum height.

[0174] According to some non-limiting embodiments, the unloading device 5' comprises a detection system DS which detects the level of objects in the compensation area CA and is connected to the control unit CU. The control unit CU adjusts the operating speed of the feed conveyor 7', in particular the conveyor 7, according to the data detected by the detection system DS, in particular according to the level of objects in the compensation area CA. In particular, the detection system DS comprises at least a deformable belt 54 which changes its position in the compensation area according to the level of objects in the compensation area CA, and a sensor 55 which detects the position of the deformable belt 54.

[0175] Advantageously, although not necessarily, the method is implemented with a storage element 1 as described above.

[0176] Reference numerals

[0177] 1 Storage unit

[0178] 2 Items

[0179] 3 Conveyor components

[0180] 4 Input Station

[0181] 5 Output Station

[0182] 6 Conveyor

[0183] 7 Conveyor

[0184] 8 Transfer conveyor components

[0185] 9 Input section

[0186] 10 Output section

[0187] 11 Propulsion

[0188] 12 Mobile Components

[0189] 13 Pulley

[0190] 14 Pulley

[0191] 15 Pulley

[0192] 16 Propulsion

[0193] 17 Plate

[0194] 18 Slots

[0195] 19 Plate support

[0196] 20 Slots

[0197] 21 Deflection belt

[0198] 22 Deflection belt

[0199] 23 Motorized pulley

[0200] 24 Motorized pulley

[0201] 25 Transmission elements

[0202] 26 Transmission elements

[0203] 27 Guide

[0204] 28 recess

[0205] 29 Guide

[0206] 30 Support structure

[0207] 31 base

[0208] 32 columns

[0209] 33 Support components

[0210] 34 Support components

[0211] 35 Bearings

[0212] 36 Fixed part

[0213] 37 Removable parts

[0214] 38 Arm

[0215] 42 Center Component

[0216] 43 Center Component

[0217] 44 Distal part

[0218] 45 Distal part

[0219] 46 Depression

[0220] 47 Depression

[0221] 48 teeth

[0222] 49 teeth

[0223] 50 lower roller

[0224] 51 lower roller

[0225] 52 Hinge

[0226] 53 Hinge

[0227] 54 Deformable Belt

[0228] 55 Sensor

[0229] 56 Transfer Channel

[0230] 57 output channels

[0231] 58 Leveling wall

[0232] 5' Unloading Device

[0233] 5” Conveyor

[0234] 7' Infeed Conveyor

[0235] 9' Joint

[0236] 10' Jointing Device

[0237] 16' Pulley

[0238] 9” centering element

[0239] 10” centering element

[0240] A axis

[0241] P-Path

[0242] S1 segment

[0243] S2 segment

[0244] IS transfer segment

[0245] SC1 connection part

[0246] SC2 connection part

[0247] AT Active Segment

[0248] PT Passive segment

[0249] M Machine

[0250] CA Compensation Area

[0251] CU Control Unit

[0252] D1 First direction

[0253] D2 Second direction

[0254] DS Detection System

Claims

1. A variable capacity storage element for articles (2), in particular substantially cylindrical articles of the tobacco processing industry, the storage element (1) comprising a conveyor assembly (3) for conveying the articles (2) from an input station (4) to an output station (5) along a path (P) of variable length; The conveyor assembly (3) comprises a first conveyor (6) configured to feed articles (2) from an input station (4) along a first section (S1) of a path (P); at least a second conveyor (7) configured to feed articles (2) to an output station (5) along a second section (S2) of the path (P); and at least a transfer conveyor assembly (8) configured to transfer articles (2) from the first section (S2) of the path (P) to an output station (5). A conveyor (6) delivers to a second conveyor (7) and has an input section (9) arranged in the area of ​​a first section (S1) for receiving articles (2) from the first conveyor (6), and an output section (10) arranged in the area of ​​a second section (S2) for feeding articles (2) to the second conveyor (7); the first section (S1) extends from the input station (4) to the input section (9); the second section (S2) extends from the output section (10) to the output station (5); The storage element (1) comprises a moving assembly (12) for moving the transfer conveyor assembly (8) so as to move the input portion (9) and the output portion (10) along the first conveyor (6) and the second conveyor (7), respectively; The storage element (1) comprises an unloading device (5'), which is arranged in the region of the output station (5) and comprises: at least a third conveyor (5") configured to transfer the objects (2) to a machine (M) arranged downstream of the storage element (1); A compensation area (CA) arranged downstream of the second conveyor (7) and upstream of the third conveyor (5"); a feed conveyor (7') configured to receive objects (2) from the second conveyor (7) and to feed the objects (2) to the compensation area (CA), in particular in a first direction (D1); and a control unit (CU) configured to adjust the operating speed of the third conveyor (5") according to a request from the machine (M) and / or to adjust the operating speed of the feed conveyor (7') according to the degree of filling of the compensation area (CA).

2. A storage element according to claim 1, wherein the unloading device (5') includes a transfer channel (56) to transport items (2) from a compensation area (CA) (in particular, including a compensation chamber with a variable volume) to the third conveyor (5"); the storage element (1) also includes an output channel (57), which is connected to the transfer channel (56) and is bounded at the bottom by the third conveyor (5") and at the top by a leveling wall (58).

3. A storage element according to claim 1 or 2, wherein the feed conveyor (7') is configured to convey the items (2) in a first direction (D1) toward the compensation area (CA); and the third conveyor (5") is configured to convey the items (2) from the compensation area (CA) in a second direction (D2), the second direction being different from (in particular opposite to) the first direction.

4. A storage element according to any of the preceding claims, wherein the control unit (CU) is configured to adjust the operating speed of the third conveyor (5") according to a request of the machine (M) and to adjust the operating speed of the second conveyor (7) according to the degree of filling of the compensation area (CA).

5. A storage element according to any one of the preceding claims, wherein the objects (2) are substantially cylindrical; the conveyor assembly (3) and the unloading device (5') being configured to transport the objects (2) transversely in bulk.

6. A storage according to claim 5, wherein the unloading device (5') is configured to feed the objects (2) to the machine (M) in bulk at a controlled height ranging from a maximum height to a minimum height.

7. A storage element according to any one of the preceding claims, wherein the unloading device (5') includes a detection system (DS), which is configured to detect the level of items (2) in the compensation area (CA) and is connected to the control unit (CU); the control unit (CU) is configured to adjust the operating speed of the feed conveyor (7') according to data detected by the detection system (DS); in particular, the detection system (DS) includes at least a deformable element (54), which is configured to change the position of the deformable element (54) in the compensation area (CA) according to the level of items in the compensation area (CA), and a sensor (55), which is configured to detect the position of the deformable element (54).

8. A storage element according to any of the preceding claims, wherein the unloading device (5') comprises a transfer channel (56) for transporting the objects (2) from a compensation area (CA) (in particular, comprising a compensation chamber of variable volume) to a third conveyor (5"), which is arranged below the compensation area (CA).

9. A storage unit according to claim 8, wherein the unloading device (5') has a leveling wall (58), which is arranged above the third conveyor (5") and is configured to limit the height of a large number of items (2) arranged on the third conveyor (5"); and an output channel (57), which is connected to the transfer channel (56) and is defined at the bottom by the third conveyor (5") and at the top by the leveling wall (58).

10. A storage element according to any one of the preceding claims, wherein the first conveyor (6) and the second conveyor (7) are arranged so that one is at least partially located above the other, in particular the second conveyor (7) is at least partially arranged above the first conveyor (6); in particular, the direction of rotation of the first conveyor (6) is opposite to the direction of rotation of the second conveyor (7).

11. A storage element according to any one of the preceding claims, wherein the first conveyor (6) and the second conveyor (7) have turns that are essentially coaxial with each other; in particular, the first conveyor (6) has a plurality of first turns; and the second conveyor (7) has a plurality of second turns, the plurality of second turns having the same radius and the same distance as the first turns.

12. A storage element according to any one of the preceding claims, wherein the conveyor assembly (3) comprises a first engagement device (9') configured to allow the article (2) to travel from the first conveyor (6) to the transfer conveyor assembly (8) and to be movable on the first conveyor (6); and a second engagement device (10') configured to allow the article (2) to travel from the transfer conveyor assembly (8) to the second conveyor (7) and to be movable on the second conveyor (7); The path (P) has a variable length; The first engaging device (9') comprises at least two first centering elements (9"), which are arranged on opposite sides of the first conveyor (6) and are used to reduce the lateral movement of the first engaging device (9') relative to the first conveyor (6), and each of the two first centering elements comprises at least a first roller (in particular, at least a roller bearing); and / or the second engaging device (10') comprises at least two second centering elements (10"), which are arranged on opposite sides of the second conveyor (7) and are used to reduce the lateral movement of the second engaging device (10') relative to the second conveyor (7), and each of the two second centering elements (10") comprises at least a second roller (in particular, at least a roller bearing).

13. A method for conveying objects (2), in particular substantially cylindrical objects of the tobacco processing industry, from an input station (4) to a machine (M) via an output station (5) along a path (P) of variable length; The method includes: a first conveying step, during which a first conveyor (6) conveys the objects (2) from the input station (4) along a first section (S1) of the path (P); a second conveying step, during which a second conveyor (7) conveys the articles (2) to an output station (5) along a second section (S2) of the path (P) arranged downstream of the first section (S1); a transfer step, during which the transfer conveyor assembly (8) transfers the articles (2) from the first conveyor (6) to the second conveyor (7) along a transfer section (IS) of the path (P), and has an output section (10) arranged in the area of ​​the second section (S2) for feeding the articles (2) to the second conveyor (7), and an input section (9) arranged in the area of ​​the first section (S1) for receiving the articles (2) from the first conveyor (6); The method further comprises a moving step which is performed at least partially simultaneously with the transferring step (and in particular, at least partially simultaneously with the first conveying step), and during the moving step, the moving assembly (12) switches the transfer conveyor assembly (8) so as to move the input portion (9) and the output portion (10) along the first conveyor (6) and the second conveyor (7), respectively; The unloading device (5') is arranged in the region of the output station (5) and comprises: at least a third conveyor (5") which transfers the objects (2) to the machine (M); A compensation area (CA) arranged downstream of the second conveyor (7) and upstream of the third conveyor (5") and containing a variable number of objects (2); and a control unit (CU) regulating the operating speed of the third conveyor (5") according to the requirements of the machine (M) and / or regulating the operating speed of the feed conveyor (7') according to the degree of filling of the compensation area (CA).

14. A method according to claim 13, wherein the second conveyor (7') conveys the items (2) in a first direction (D1) towards the compensation area (CA); and the third conveyor (5") conveys the items (2) from the compensation area (CA) along the output channel (57), in particular in a second direction (D2), which is at least partially different from (more particularly, opposite to) the first direction (D1).

15. The method according to claim 13 or 14, comprising a feeding step, during which the feed conveyor (7') receives the objects (2) from the second conveyor (7) and feeds the objects (2) to the compensation area (CA), in particular in the first direction (D1); the control unit (CU) adjusts the running speed of the feed conveyor (7') according to the degree of filling of the compensation area (CA).

16. Method according to any one of claims 13 to 15, wherein the conveyor assembly (3) and the unloading device (5') transport the articles (2) transversely in bulk.

17. Method according to any one of claims 13 to 16, wherein an unloading device (5') feeds the objects (2) to the machine (M) in bulk at a controlled height.

18. A method according to any one of claims 13 to 17, wherein the unloading device (5') includes a detection system (DS), which detects the level of objects in the compensation area (CA) and is connected to the control unit (CU); the control unit (CU) adjusts the running speed of the feed conveyor (7') according to the data detected by the detection system (DS); in particular, the detection system (DS) includes at least a deformable element (54) and a sensor (55), the deformable element (54) changes the position of the deformable element (54) in the compensation area (CA) according to the level of objects in the compensation area (CA), and the sensor (55) detects the position of the deformable element (54).

19. The method according to any one of claims 13 to 18, implemented by a storage element (1) according to any one of claims 1 to 12.

20. An apparatus comprising a storage element (1) according to any one of claims 1 to 12 and a machine (M), such as a packaging machine or a machine for making a final product using the objects (2).

Images