EP4713273A1 - Conveyor assembly and method for conveying articles - Google Patents

Abstract

A conveyor assembly (3) for cylindrical articles (2) of the tobacco processing industry, comprising a first conveyor (6) configured to advance the articles (2) from the inlet station (4) along a first section (S1) of a path (P); a transfer conveyor assembly (8), which is configured to convey the articles (2) from the first conveyor (6) along a transfer section (IS) of the path (P) and has an inlet (9), arranged at the first section (S1) for receiving the articles (2) from the first conveyor (6); and a detector device (DD), which is configured to acquire images of at least one area of the transfer section (IS) and of the articles (2) arranged at said area.

Description

CONVEYOR ASSEMBLY AND METHOD FOR CONVEYING ARTICLES

CROSS-REFERENCE TO RELATED APPLICATIONS

This Patent Application claims priority from Italian Patent Application No. 102023000010236 filed on May 19, 2023, the entire disclosure of which is incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to a conveyor assembly and to a method for conveying articles.

BACKGROUND OF THE INVENTION

In the field of the tobacco processing industry, variablecapacity storage units for cigarettes of the type described in patent EP581143 are known. Said storage units comprise a variable-length storage path having two conveying portions wound around one another on a common axis with loops having the same inclination; and a deviation device, which is configured to move the cigarettes from one portion to the other and is movable along both portions so as to vary the overall length of the storage path.

EP838165 discloses a variable-capacity storage unit comprising two helical conveyors arranged one above the other and connected by an intermediate element configured to transfer, only by gravity, the products from the upper conveyor to the lower conveyor. The two conveyors work pneumatically.

This type of storage unit has several drawbacks, among which the following will be mentioned.

The particular arrangement of the two conveying portions arranged one inside the other not only makes the structure and construction of the storage units particularly complex and expensive but also significantly complicates the maintenance work. Furthermore, storage units are not very ductile since it is not possible to provide inlet and outlet stations for the cylindrical articles arranged in opposite positions (for example one at the bottom and one at the top). More specifically, what is described in EP581143 and EP838165 provides that the outlet of the articles is at the bottom, a position not particularly convenient for the layouts of current machines (such as, for example, cigarette packaging machines or combiners for combining filters and tobacco pieces) that can be found downstream of the storage units.

It should also be noted that the pneumatic conveyors (as described for example in EP838165) are relatively indelicate with the articles (in particular, the cigarettes). In fact, this type of conveyor cannot only damage the articles with relative ease but can lead to the detachment and dispersion of particles (for example of tobacco) from the articles themselves.

It is also noted that feeding relatively delicate articles (such as cigarettes) exclusively by gravity can lead to the damage to the articles and/or obstruction of the same.

WO2019073447A1 discloses a variable-capacity storage unit for articles of the tobacco processing industry, comprising a conveyor assembly comprising a first conveyor having a substantially helical shape; a second conveyor substantially helical in shape and arranged above the first conveyor; a linear transfer conveyor, suitable for conveying the articles from the first conveyor to the second conveyor, having variable length. This type of storage unit has certain drawbacks, among which worth mentioning is the fact that it is possible that obstructions may occur due, for example, to the skewing of some articles. This can lead to the suspension of production even for a relatively long time (the greater the obstruction, the longer it will take to be resolved) and/or damage to the articles. The object of the present invention is to provide a conveyor assembly and a method for conveying articles which allow the drawbacks of the prior art to be overcome, at least partially, and are, at the same time, easy and inexpensive to produce/implement .

SUMMARY

In accordance with the present invention a conveyor assembly and a method for conveying articles are provided as set forth in the independent claims reported below and, preferably, in any of the claims directly or indirectly dependent on the aforementioned independent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be described with reference to the attached drawings, which illustrate a non-limiting embodiment thereof, wherein:

- Figures from 1 to 5 are perspective views in successive operational conformations of a storage unit comprising a conveyor assembly obtained according to the present invention;

- Figure 6 is a side view of a component of the storage unit in Figures 1-5;

- Figure 7 is a section of a detail of the storage unit in Figures 1-5;

- Figure 8 is a perspective view of the machine of Figures 1-5 with some details removed for clarity;

- Figure 9 is a perspective view of the component of Figure 6 connected to a further element;

- Figure 10 is a perspective view of components of the storage unit of Figures 1-5;

- Figure 11 is a perspective view of a detail of the storage unit of Figures 1-5;

- Figure 12 is a perspective view from below of a detail of Figure 11;

- Figure 13 is a side view of a part of the storage unit of Figures 1-5, with some details in an alternative version; and - Figures 14 and 15 show examples of images that can be acquired by implementing a method according to the present invention.

DETAILED DESCRIPTION

In the attached Figures, 1 denotes as a whole a variable-capacity storage unit for articles 2. The storage unit comprises a conveyor assembly 3 to convey the articles 2 (in particular, in bulk) from an inlet station 4 to an outlet station 5 along a path P (in particular, having a variable length).

In particular, the articles 2 are substantially cylindrical articles, more specifically of the tobacco processing industry. For example, the articles 2 are cigarettes, cigarette filters, components (pieces) of cigarette filters, tobacco pieces, cartridges and/or electronic cigarette components. According to some specific and non-limiting embodiments, the articles 2 are cigarettes.

The conveyor assembly 3 comprises a conveyor 6 for advancing the articles 2 from the inlet station 4 along a section S1 of the path P; and at least one transfer conveyor assembly 8, which is configured to convey the articles 2 from the conveyor 6 along a transfer section IS (in particular, with substantially linear portions) of the path P and has an inlet 9, arranged at the section S1 for receiving the articles 2 from the conveyor 6.

In particular, the conveyor assembly 3 is suitable for transporting the articles 2 in bulk (namely, in contact with one another and in several layers - see for example the enlargement of the upper part of Figure 1 and Figure 13) and, more specifically, transversely (namely, in a transverse direction, in particular perpendicular to their longitudinal extension).

Advantageously but not necessarily, the conveyor assembly 3 further comprises a conveyor 7 for feeding the articles 2 to the outlet station 5 along a 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 the transfer section IS (in particular, substantially linear) of the path P and has an outlet 10, arranged at the section S2 for feeding the articles to the conveyor 7.

In particular, the conveyors 6 and 7 (and, in some cases, also the transfer conveyor assembly 8) are endless conveyors.

According to some non-limiting embodiments, the transfer conveyor assembly 8 is arranged between the conveyors 6 and 7.

Advantageously but not necessarily, the transfer conveyor assembly 8 is arranged to the side of the conveyors 6 and 7.

Advantageously but not necessarily, the transfer conveyor assembly 8 is configured to convey the articles 2 upwards.

The section S1 (which, in particular, has a substantially helical shape) extends from the inlet station 4 to the inlet 9. The section S2 (which, in particular, has a substantially helical shape) extends from the outlet 10 to the outlet station 5.

According to some non-limiting embodiments, the storage unit 1 further comprises a moving assembly 12 for moving the transfer conveyor assembly 8 so as to move said inlet 9 and said outlet 10 along the conveyor 6 and the conveyor 7, respectively. In particular, the moving assembly 12 is also (consequently) configured to vary the length of the transfer section IS and of the sections S1 and S2.

Note that, by extending the sections S1 and S2, the length of the path P (and therefore the capacity of the storage unit 1) is increased; by shortening the sections S1 and S2, the length of the path P is reduced (and therefore the capacity of the storage unit 1).

Making particular reference to Figure 13, the conveyor assembly 3 comprises a detector device DD, which is configured to acquire images of at least one area of the transfer section IS and of the articles 2 arranged at said area.

It has been experimentally observed that in this way it is possible to identify problems that can lead to skewing and/or damages to the articles 2.

In particular, the detector device DD is configured to detect any incorrect positions of the articles 2 and/or the forming of empty spaces (at the aforementioned area of the transfer section IS).

In this way it is possible, if necessary, to intervene to correct these problems.

Note, indeed, that said incorrect positions of the articles 2 and/or empty spaces can give a greater probability that the articles 2 will skew (and create obstructions and/or be damaged).

Advantageously but not necessarily, the detector device DD is configured to acquire images of the articles 2 arranged at the inlet 9 (in particular, at the connecting device 9'). In particular, the detector device DD can be arranged at the inlet 9 (more specifically, at a connecting device 9' - described in more detail in the following).

It has been experimentally observed that, by positioning the detector DD in this way, it is possible to detect the forming of voids more easily and promptly and/or the forming of skewing (which can damage the articles 2 and/or create obstructions). Following these observations, it was hypothesized that this is due to the fact that these problems are more likely to arise when passing from the conveyor 6 to the transfer conveyor assembly 8.

Advantageously but not necessarily, the conveyor assembly 3 comprises a control unit CU, which is connected to the detector device DD. In particular, the detector device DD is configured to transfer the (acquired) images to the control unit CU. In particular, the control unit CU is configured to evaluate the orientation and/or position of the articles 2 in the (acquired) images, in particular to identify (and report) any incorrect positions of the articles 2 and/or the forming of empty spaces (at the aforementioned area of the transfer section IS).

According to some non-limiting embodiments, the control unit CU is configured to emit an error signal depending on the (acquired) images, in particular by evaluating the orientation and/or position of the articles 2 in the (acquired) images. In particular, the control unit CU is configured to identify an incorrect position and/or an incorrect orientation of the articles 2 and/or voids in the flow (in the mass) of the articles 2. Alternatively, or in addition, to do this, the control unit CU is configured to compare (acquired) images with reference images.

In this way it is possible, among other things, to intervene (for example with an operator) to correct the problem before a major obstruction is formed which, for example, requires more time to be fixed and/or more articles 2 are damaged.

Figure 14 is an example of an image acquired by the detector device DD, in which there is a void 2' at the top of the (mass) flow of the articles 2. Figure 15 is an example of an image acquired by the detector device DD, in which an article 2" (of the articles 2) has an orientation opposite to the correct one. According to non-limiting embodiments, the control unit CU is configured to regulate the operating speed of the transfer conveyor assembly 8, in particular, of the second conveyor element (and/or regulate the operating speed of the second conveyor 7) and/or the operating speed of the first conveyor 6 (in particular, of the first conveyor element) as a function of the images (acquired) and/or the operation of the moving assembly 12 (for example, in order to move - rotate - the transfer conveyor 8 in one direction or in the opposite direction to shorten or lengthen - slightly - the path P and, for example, compensate for any empty areas).

In particular, also in this case, to do this the control unit CU is configured to compare (acquired) images with reference images (and, therefore, identify an incorrect position and/or an incorrect orientation of the articles 2 and/or the presence of voids in the mass of articles 2).

In this way it is possible, among other things, to reduce the empty areas and therefore the risk of skewing (and, consequently, obstructions) and, at the same time, increase the movement speed of the articles 2 along the path P.

Alternatively, or additionally, the control unit CU comprises a memory configured to store (acquired) images.

In this way it is possible to understand how an obstruction was created and, therefore, attempt to correct any problems found along the P path.

In this context, advantageously but not necessarily, the control unit CU can be provided with an operator interface for example comprising a screen, on which the operator can directly visualize the (acquired) images. According to some non-limiting embodiments (for example as illustrated in Figures 11 and 12), the conveyor assembly 3 comprises a connecting device 9', which is configured to allow the passage of the articles 2 from the conveyor 6 to the transfer conveyor assembly 8 and is moveable on the conveyor 6. In some cases, the conveyor assembly 3 further comprises a connecting device 10', which is configured to allow the passage of the articles 2 from the transfer conveyor assembly 8 to the conveyor 7 and is moveable on the conveyor 7.

In particular, the connecting device 9' comprises at least two centring elements 9", which are arranged on opposite sides of the conveyor 6 to reduce the lateral movement of the connecting device 9' relative to the conveyor 6.

In particular, the connecting device 10' comprises at least two centring elements 10", which are arranged on opposite sides of the conveyor 7 to reduce the lateral movement of the connecting device 10' relative to the conveyor 7.

Each centring element 9" comprises at least one first roller (in particular, at least one roller bearing) and/or each centring element 10" comprises at least one second roller (in particular, at least one roller bearing).

It has been experimentally observed that, in this way, it is possible to obtain more stable and reliable connections of the transfer conveyor assembly 8 with the conveyors 6 and/or 7 (a more precise relative position) and a reduction in obstructions.

Advantageously but not necessarily, the conveyor assembly 3 comprises the connecting device 9'. In particular, the conveyor assembly 3 comprises both the connecting device 9' and the connecting device 10'.

According to some preferred but non-limiting embodiments, the connecting elements 9' and 10' are substantially the same. In this regard, note that Figures 11 and 12 represent both the connecting device 9' and the connecting device 10'.

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

Advantageously but not necessarily, the transfer conveyor assembly 8 has at least one advancement device 11 configured to accompany (at least partially) the articles 2, moving (together with the articles) along an intermediate portion of the transfer section IS. In particular, this intermediate portion of the transfer section IS extends upwards, more specifically it is substantially vertical.

According to some non-limiting embodiments, the advancement device 11 comprises (is) an elongated element closed on itself. In particular, the advancement device 11 comprises (is) a belt, a strap and/or a chain.

Due to the presence of the advancement device 11, the risks of obstructions of the articles 2 along the transfer section IS and of the articles 2 being damaged while, in use, are conveyed along the transfer section IS are reduced. Due to the advancement device 11 it is also possible to proceed to feed the articles 2 from the conveyor 6 arranged at the bottom to the conveyor 7 arranged at the top.

Advantageously but not necessarily, the advancement device 11 is configured to move (at least partially) the articles 2, by moving (together with the articles) along the transfer section IS.

In particular, the transfer section IS extends between inlet 9 and outlet 10 (more specifically, from the inlet 9 to the outlet 10).

The inlet 9 and the outlet 10 are movable along the conveyor 6 and, respectively, the conveyor 7.

In particular, each conveyor 6 and 7 has at least one respective winding (e.g., a helix and/or a loop). Advantageously but not necessarily, each conveyor 6 and 7 has a plurality of respective windings (loops). In other words, each conveyor 6 and 7 is wound around itself so as to have a plurality of windings (loops). More specifically, the winding direction of the conveyor 6 is opposite to the winding direction of the conveyor 7. For example, if (looking from above) the winding direction of the conveyor 7 is clockwise, the winding direction (always looking from above) of the conveyor 6 is counterclockwise.

Advantageously but not necessarily, the conveyor 6 has a plurality of first windings (loops) and the conveyor 7 has a plurality of second windings (loops) having the same radius and the same pitch as the first windings.

According to specific non-limiting embodiments, the conveyor 6 has a plurality of windings with a constant radius and pitch; the conveyor 7 has a plurality of windings with a constant radius and pitch. More precisely, the conveyor 6 has at least one section with a helical (cylindrical) shape with a constant radius and pitch; the conveyor 7 has at least one section with a helical (cylindrical) shape with a constant radius and pitch.

According to alternative and not illustrated embodiments, each winding comprises two curved end portions and two linear central portions. In these cases, for example the windings extend around two drums having parallel axes (see for example Figure 1 of EP738478 of the same applicant). Advantageously but not necessarily, the transfer conveyor assembly 8 comprises a pulley 13 (or, as an alternative, a suitably shaped sliding surface - for example "U" shaped) and a pulley 14, around which the advancement device 11 is partially wound.

In particular, the storage unit 1 (more precisely, the transfer conveyor assembly 8) comprises at least one actuator assembly (of a type known per se and not illustrated) to rotate at least one of the pulleys 13 and 14. More specifically, note that the transfer conveyor assembly 8 is structured so that the outlet 10 is arranged approximately in the area of (more precisely, at the height) of the pulley 14 and the inlet 9 is arranged in the area of (more precisely, at the height ) of pulley 13 (or of the sliding surface alternative to the pulley 13).

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

Advantageously but not necessarily, the storage unit 1 (in particular, the transfer conveyor assembly 8; more particularly, the moving assembly 12) comprises an actuator assembly (of a type known per se and not illustrated) so as to bring the pulleys 13 and 14 closer and further apart from one another, in particular in a longitudinal extension direction (of the intermediate portion) of the transfer section IS (more particularly, in a substantially vertical direction).

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

In particular, the aforementioned actuator assembly is configured to vary the distance between the pulleys 13 and 14 as a function of (proportionally to) the difference between the speeds at which the conveyor 6 and the conveyor 7 convey the articles 2. More particularly, the actuator assembly is configured to vary the distance between the pulleys 13 and 14 with a speed proportional to the difference between the speeds at which the conveyor 6 and the conveyor 7 convey the articles 2.

According to some non-limiting embodiments, the advancement device 11 comprises an active section AT having a variable length which extends along (the intermediate portion of) the transfer section IS between the pulleys 13 and 14 and a passive section PT arranged at the opposite part of the pulleys 13 and 14 relative to the active section AT (in other words, so that 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 around at least one further pulley 15 of the transfer conveyor assembly 8, which comprises, furthermore, a further actuator assembly (also known per se and not illustrated) to move the pulley 15 (moving away from and towards the transfer section IS).

Note that, advantageously, the relative movement between the pulleys 13 and 14 and the movement of the pulley 15 are connected to one another so that one compensates the other (and the advancement device 11 always remains correctly tensioned). In other words, when the active section AT is shortened by a given length, the passive section PT is extended by the given length and vice versa (thus compensating one with the other).

In some non-limiting cases, the further actuator assembly comprises a kinematic mechanism which transfers, according to a defined proportional ratio (for example 1 to 1), the relative movement (more precisely, the shifting) of the pulleys 13 and 14 towards the pulley 15.

In particular, the transfer conveyor assembly 8 comprises at least one pulley 15 and at least two fixed pulleys (known per se and not illustrated - typically, arranged one above the other). More precisely but not necessarily, the pulley 15 is arranged (at an intermediate height) between the two fixed pulleys and is movable (horizontally) towards and away from the fixed pulleys. The relative movement between the pulley 15 on one side and the fixed pulleys on the other compensates for the relative movement between the pulleys 13 and 14 (extending the passive section PT when the active section AT is shortened and vice versa).

According to some specific and non-limiting embodiments (such as the one illustrated), the transfer conveyor assembly 8 comprises at least two pulleys 15 and at least three fixed pulleys (known per se and not illustrated). In these cases, the relative movement between the pulleys 15 on one side and the fixed pulleys on the other compensates the relative movement between the pulleys 13 and 14 (extending the passive section PT when the active section AT is shortened and vice versa).

Advantageously but not necessarily, the transfer conveyor assembly 8 comprises at least one further advancement device 16, which is arranged facing the advancement device 11 and is configured to move along the intermediate portion of the transfer section IS (in particular, in a coordinated manner with the advancement device 11; more precisely, at the same speed as the advancement device 11). In particular, the advancement device 11 and the advancement device 16 are suitable for clamping the articles 2 together and accompanying the latter (moving them) at least partially along the transfer section IS.

More precisely, the advancement device 16 comprises (is) a belt, a strap and/or a chain.

Advantageously but not necessarily, the transfer conveyor assembly 8 comprises a motor (electric - of a type known per se and not illustrated) to drive (rotate) one of the pulleys 16' and a different motor (electric - of a type known per se and not illustrated) to drive (rotate) one of the pulleys 14 and 13 (in particular, the pulley 14). In particular, the storage unit

I (more precisely, the transfer conveyor assembly 8) comprises a control unit configured to drive the two electric motors in a coordinated manner so that the speeds of the advancement devices

II and 16 are equal to one another (even when the pulleys 13 and 14 move away or closer to one another). For example, in use, when the pulleys 13 and 14 move apart and the rotation speed of the pulleys 16' is kept constant (so as not to vary the movement speed of the articles 1 along the section IS), the rotation speed of the pulley 14 is decreased.

According to some alternative and non-limiting embodiments, the advancement device 16 is wound around a pair of pulleys 16' (one of which is illustrated in Figures 1-6 and the other is illustrated in Figure 13). In particular, one of the pulleys 16' is connected by means of a kinematic mechanism (of a type known per se and not illustrated) to at least one of the pulleys 14 and 13, which kinematic mechanism (connected to a motor) is configured to transfer the rotary motion from the pulleys 13 and 14 to the pulley 16' so that the speeds of the advancement devices 11 and 16 are equal to one another.

Due to the advancement device 16, the risks of the obstruction of the articles 2 along the transfer section IS and of the articles 2 being damaged while, in use, are conveyed along the transfer section IS are further reduced. Due to the advancement 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.

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

Alternatively, or in addition, the transfer conveyor assembly 8 comprises two flat supports 19, on which the pulleys 13 and 14, respectively, are mounted (in a rotatable manner). More precisely, the aforementioned actuator assembly (not illustrated) is configured to move the flat supports 19.

In some cases, the flat supports 19 slide along the slots 18 or are movable along linear guides. The movement of the flat supports 19 can be, for example, obtained by means of linear drivers and/or kinematic mechanisms connected to other parts of the storage unit 1.

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

According to alternative and non-limiting embodiments, the pulleys 15 are mounted on respective sliders movable along linear guides. The movement of these sliders can be, for example, obtained by means of linear drivers and/or kinematic mechanisms connected to other parts of the storage unit 1.

Advantageously but not necessarily, the connecting device 9' and the connecting device 10' move in the direction of the longitudinal extension of the transfer section IS integrally with a respective pulley 13 and 14.

According to some non-limiting embodiments, the transfer conveyor assembly 8 further comprises a diverter belt 21 arranged at the pulley 13 to direct (by modifying the advancement direction thereof) the articles 2, coming from the inlet 9, into the transfer section IS. In addition, or alternatively, the transfer conveyor assembly 8 further comprises a diverter belt 22 arranged at the pulley 14 to direct (by modifying the advancement direction thereof) the articles 2, coming from the transfer section IS, towards the outlet 10.

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

Advantageously but not necessarily, the conveyors 6 and 7 are arranged so that one is (at least partially) above the other. In particular, the conveyor 7 is arranged (at least partially) above the conveyor 6 (and the outlet station 5 is arranged higher than the inlet station 4). In this way it is possible to have the outlet 10 in a relatively high position compared to the inlet 9.

In some non-limiting cases, the outlet station 5 is arranged higher (than the inlet 9) and the inlet station 4. In particular, the outlet station 5 is arranged higher than the outlet 10, which it is, in turn, arranged higher than the inlet 9, which is arranged higher than the inlet station 4.

More precisely (the conveyors 6 and 7 are arranged so that), the sections S1 and S2 are substantially coaxial with one another.

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

In accordance with specific non-limiting embodiments, the section IS also has two connecting sections SC1 and SC2 (transversal - in particular, perpendicular - to the intermediate portion) which extend between the intermediate portion of the transfer section IS and the sections S1 and S2, respectively. The transfer conveyor assembly 8 is configured to convey the articles 2 also along the connecting sections SC1 and SC2.

More precisely but not necessarily, the connecting portions SC1 and SC2 extend substantially horizontally.

The transfer conveyor assembly 8 comprises at least (a further conveyor with at least) one conveyor element 8' (in particular, a belt, a strap and/or a chain) and configured to convey the articles 2 from the inlet 9 along at least one portion of the transfer section IS. In particular, the conveyor element 8' (extends substantially horizontally and) is configured to convey the articles 2 from the inlet 9 along the (at least part of) the connecting section SC1.

Advantageously but not necessarily, the conveyor element 8' is configured to accompany the articles 2 at least partially along at least part of said second section S2.

According to some non-limiting embodiments, the transfer conveyor assembly 8 comprises a further conveyor with mobile conveyor elements (substantially horizontal) at the connection section SC2.

Advantageously but not necessarily, the moving assembly 12 is configured to rotate the transfer conveyor assembly 8 around the axis A.

In use, while the moving assembly 12 rotates the transfer conveyor assembly 8 around the axis A, the inlet 9 (more precisely, the connecting device 9') moves (slides) along the conveyor 6 and the outlet 10 (more precisely, the connecting device 10') moves (slides) along the conveyor 7. To make the conveyor 6 following the inlet 9 and the conveyor 7 following the outlet 10, the distance between the pulleys 13 and 14 is made to vary.

Figures from 1 to 5 show the storage unit 1 in successive operational steps while the storage unit 1 is being filled. These figures illustrate what has been meant above, namely, that the rotation movement is also associated with a variation in the length of the section IS (in other words, a variation in the distance between the pulleys 13 and 14).

The conveyor 6 comprises at least one conveyor element 25 (in particular, a belt, a strap and/or a chain - in particular, the conveyor element 25 is different - and separate - from the transport element 8' and configured to feed said articles 2 to the inlet 9. In particular, the conveyor element 25 is configured to accompany the articles 2 at least partially along at least part of said first section S1 (up to the inlet 9).

Advantageously but not necessarily, the conveyor 7 further comprises at least one respective conveyor element 26 (in particular, a belt, a strap and/or a chain) to convey said articles 2 from the outlet 10 (to the outlet station 5).

As better shown in Figure 10, the conveyor 6 comprises at least one motorized pulley 23 and the conveyor 7 comprises at least one motorized pulley 24. The pulleys 23 and 24 are designed to allow the movement of the conveyor element 25 and of the conveyor element 26, respectively, along the section S1 and S2 (and along respective return sections), respectively. The sections S1 and the respective return section together define a path closed on itself (typical of an endless conveyor). The sections S2 and the respective return section together define a path closed on itself (typical of an endless conveyor). The conveyor element 25 is, according to some non-limiting embodiments, a belt, a strap and/or a chain. Advantageously but not necessarily, the conveyor element 25 is a chain. More precisely, the conveyor element 25 is a chain as, for example, described in US6364094 and/or W02013141807.

The conveyor element 26 is, according to some non-limiting embodiments, a belt, a strap and/or a chain. Advantageously but not necessarily, the conveyor element 26 is a chain. More precisely, the conveyor element 26 is a chain as, for example, described in US6364094 and/or W02013141807.

The conveyor elements 25 and 26 allow the articles 2 to be handled delicately.

Advantageously but not necessarily, the conveyor 6 comprises (Figure 7) a guide (a track) 27.

In particular, the conveyor element 25 is configured to slide on the guide 27.

According to some non-limiting embodiments, the guide 27 is provided with a recess 28 inside which a (lower) protuberance of the transport element 25 extends. Due to this structure the element 25 follows the guide 27 and moves along the section S1. In this regard, note 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).

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

In particular, the conveyor element 26 is configured to slide on the guide 29. According to some non-limiting embodiments, the guide 29 has structure and function similar to the guide 29. The guide 29 extends along the path S2; more precisely, the guide 29 has the shape of the path S2 (and defines the path S1).

Advantageously but not necessarily, the centring elements 9" are arranged on opposite sides of the guide 27 and substantially in contact with the guide 27.

Additionally, or alternatively, the centring elements 10" are arranged on opposite sides of the guide 29 and substantially in contact with the guide 29.

Making particular reference to Figure 8, according to some non- limiting embodiments, the storage unit 1 further comprises a main support structure 30 carrying the conveyors 6 and 7 (more precisely, the guides 27 and 29) and the transfer conveyor assembly 8.

According to some non-limiting embodiments, the main support structure 30 comprises a base 31 and a support column 32 projecting (perpendicularly) from the base 31. In particular, the column 32 extends parallel to the axis A; more specifically, 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.

According to some non-limiting embodiments, the main support structure 30 further comprises a support assembly 33 fixed on the column 32 and carrying the conveyor 6 (more precisely, the guide 27) and a support assembly 34 fixed on the column 32, spaced from the support assembly 33 and carrying the conveyor 7 (more precisely, the guide 29).

Furthermore, in some non-limiting cases (such as the one illustrated), the main support structure 30 further comprises a bearing 35, which, in particular, is placed 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 comprises a fixed portion 36 mounted on the support assembly 33 and a movable portion 37 configured to rotate around the axis A and carrying the transfer conveyor assembly 8. Even more in detail, the transfer conveyor assembly 8 is mounted integral with the bearing 35 (more precisely, with the movable portion 34) by means of two arms 38.

According to some non-limiting embodiments, the moving assembly 12 comprises at least one motor (of a type known per se and not illustrated) configured to move the transfer conveyor assembly 8 (more precisely, rotate the transfer conveyor assembly 8 around the axis A). In these cases, in particular, the storage unit 1 comprises sensors (encoders - of a known type and not illustrated) to detect the difference in speed between the conveyors 6 and 7 (more precisely, between the motorized pulleys 24 and 25) and a control unit to drive the moving assembly 12 according to said difference.

Advantageously but not necessarily, the aforementioned actuator assembly (to move the pulleys 13 and 14 closer and further away from one another) comprises a kinematic mechanism (for example a gear system with worm screw) connected to the motor of the moving assembly 12 so as to transmit the motion (according to a particular proportion) to the pulleys 13 and 14 (to move away and/or close).

Advantageously but not necessarily, the transfer conveyor assembly 8 is configured to modify the speed at which the length of the transfer section varies accordingly to the rotation speed imparted by the moving assembly 12 around the rotation axis (in this regard see, for example, WO2019073447A1). According to some embodiments, the moving assembly 12 comprises a mechanical connection configured to move the transfer conveyor assembly 8 (more precisely, rotate the transfer conveyor assembly 8 around the axis A) as a function of the speed differences between the conveyors 6 and 7 (more precisely, between the motorized pulleys 24 and 25).

Typically, in use, the storage unit 1 is placed between a first machine (for example, a cigarette production machine) and a second machine (for example, a packaging machine) so as to compensate for the different speeds at which the first machine feeds the articles 2 to the storage unit 1 and the second machine uses the articles 2 coming from the storage unit. More precisely, the storage unit 1 comprises a control system (of which the control unit CU is part) connected to the first and second machines (for receiving information on speed) and configured to regulate the speed of the conveyor 6 so as to adapt the same to the speed of the first machine and to adjust the speed of the conveyor 7 so as to adapt the same to the speed of the second machine.

Making particular reference to Figures 11 and 12, according to some non-limiting embodiments, the connecting device 9' comprises a central element 42, over which, in use, the articles 2 pass from the first conveyor 6 to the transfer conveyor assembly 8. The centring elements 9" are arranged on opposite sides of the central element 42 (and substantially integral with the central element 42).

Additionally, or alternatively, the connecting device 10' comprises a central element 43, over which, in use, the articles 2 pass from the transfer conveyor assembly 8 to the second conveyor 7. The centring elements 10" are arranged on opposite sides of the central element 43 (and substantially integral with the second central element 42). In this way, it has been experimentally observed that the relative position of the transfer conveyor assembly 8 (in particular, of the connecting devices 9' and 10') relative to the conveyors 6 and 7 is more stable and precise.

Advantageously but not necessarily, the central element 42 has at least one distal portion 44 relative to the transfer conveyor assembly 8 (that is, arranged at a distal end relative to the transfer conveyor assembly 8) tapered towards the conveyor 6.

Optionally, the central element 43 has at least one distal portion 45 relative to the transfer conveyor assembly 8 (that is, arranged at a distal end relative to the transfer conveyor assembly 8) tapered towards the second conveyor 7.

In this way, the passage of the articles 2 from and towards the transfer conveyor assembly 8 is facilitated, while at the same time reducing the risk of obstruction.

According to some non-limiting embodiments, the central elements 42 act as slides.

Advantageously but not necessarily, the conveyor element 25 (in particular, a belt, a strap and/or a chain) is configured to slide along at least the section S1 and has at least one depression 46 (in particular, at least two depressions 46) which extends longitudinally along the conveyor element 25.

Additionally, or alternatively, the conveyor element 26 is configured to slide along at least the section S2 and has at least one depression 47 (in particular, at least two depressions 47) which extends longitudinally along the conveyor element 26.

In particular, the first central element 42 has at least two prongs 48, which project from the opposite side relative to the transfer conveyor assembly 8 (in particular, from the distal portion 44) and, in particular, extend (each) at least partially inside of a (respective) depression 46.

In addition, or alternatively, the central element 43 has at least two prongs 49, which project from the opposite side relative to the transfer conveyor assembly 8 (in particular, from the distal portion 45) and, in particular, extend (each) at least partially within a (respective) depression 46.

In this way, it has been experimentally observed that the passage of the articles 2 from and towards the transfer conveyor assembly 8 is facilitated and the risk of obstruction is reduced.

Advantageously but not necessarily, each prong 48 and 49 is tapered towards its free end (in particular, away from the transfer conveyor assembly 8).

Advantageously but not necessarily, the connecting device 9' comprises at least one lower roller 50 (in particular, a bearing) which is arranged in contact with the conveyor 6 (in particular, in contact with the transport element 25; in particular, arranged between the central element 42 and the conveyor 6) and is configured to facilitate the sliding of the first connecting device 9' on the first conveyor 6. In particular, the lower roller 50 has a rotation axis transverse to the section S1.

It has been experimentally observed that, in this way, the sliding of the connecting devices 9' and 10' is better and the risk of obstructions is reduced.

In addition, or alternatively, the connecting device 10' comprises at least one lower roller 51 (in particular, a bearing) which is arranged in contact with the conveyor 7 (in particular, in contact with the transport element 26; in particular, arranged between the central element 43 and the conveyor 7) and is configured to facilitate the sliding of the second connecting device 10' on the second conveyor 7. In particular, the lower roller 51 has a rotation axis transverse to the section S2.

According to some non-limiting embodiments, the connecting device 9' comprises at least two lower rollers 50 offset from one another (and/or staggered, particularly regarding the position along the section S1). Additionally, or alternatively, the connecting device 10' comprises at least two lower rollers 51 offset from one another (and/or staggered and/or staggered, particularly regarding the position along the section S2).

It has been experimentally observed that, in this way, the sliding of the connecting devices 9' and 10' is surprisingly smoother (with fewer jolts) and the risk of obstruction is reduced. Said behaviour was particularly observed when the transporter elements 25 and 26 had an irregular surface (e.g., they were chains).

It is hypothesized that this result is due to the fact that, with this structure, the lower rollers 50 (and/or 51) are not simultaneously found in depressions (discontinuities) of the conveyor element 25 (and/or 26).

Advantageously but not necessarily, the conveyor assembly 3 comprises a hinge 52, which is arranged between the connecting device 9' and the transfer conveyor assembly 8 and is configured to allow the connecting device 9' to oscillate relative to the transfer conveyor assembly 8 around a respective oscillation axis (in particular, transverse to the section S1).

Additionally, or alternatively, the conveyor assembly 3 comprises a hinge 53, which is arranged between the connecting device 10' and the transfer conveyor assembly 8 and is configured to allow the connecting device 10' to oscillate relative to the transfer conveyor assembly 8 around a respective oscillation axis (in particular, transverse to the section S1). Also in this case, a more fluid movement of the articles 2 and a reduction in the risk of obstructions was surprisingly observed.

The storage unit 1 according to the present invention has several advantages compared to the state of the art. Among others, it is pointed out that it is possible to have a less complex structure that allows relatively simple maintenance interventions. Furthermore, the storage unit 1 becomes particularly useful, as it can also allow having an outlet station at the top (particularly convenient position for the layouts of current machines), and delicate in handling the articles 2. The connections of the transfer conveyor assembly 8 with the conveyors 6 and 7 are stable and reliable. The risks of obstruction forming in the articles 2 and/or that these obstructions are large and/or that the articles 2 become damaged are also reduced.

Unless explicitly indicated otherwise, the content of the references (articles, texts, patent applications, etc.) cited in this text is referred herein in full for completeness of description. In particular, the aforementioned references are incorporated herein for reference.

In accordance with a further aspect of the present invention, a method is provided for conveying the articles 2, in particular substantially cylindrical ones (more particularly from the tobacco processing industry), from the inlet station 4 to the outlet station 5 along the path P (in particular having a variable length).

The method comprises: a first conveying step, during which at least the conveyor element 25 of the conveyor 6 advances the articles 2 from the inlet station 4 along the section S1 of the path P; a transfer step, during which the transfer conveyor assembly 8 conveys the articles 2 from the conveyor 6 along the transfer section IS of the path P and has the inlet 9, arranged at the section S1 for receiving the articles 2 from the conveyor 6; the conveyor 6 comprises at least the conveyor element 25 (in particular, a belt, a strap and/or a chain) which feeds said articles 2 to the inlet 9; the transfer conveyor assembly 8 comprises at least the conveyor element 8' (in particular, a belt, a strap and/or a chain - in particular different from the conveyor element 25), which conveys the articles 2 from the inlet 9 along at least one portion of the transfer section IS.

The detector device DD acquires images of at least one area of the transfer section IS and of the articles 2 arranged at said area (in particular, during at least part of the transfer step; more particularly, during at least part of the first conveying step; namely, while the 2 articles are conveyed).

In particular, the detector device DD detects any incorrect positions of the articles 2 and/or empty spaces (at the aforementioned area of the transfer section IS).

In this way it is possible, if necessary, to intervene to correct these problems.

It is observed, in fact, that said incorrect positions of the articles 2 and/or empty spaces can give a greater probability that the articles 2 skew (and create obstructions and/or become damaged).

Advantageously but not necessarily, the method comprises a management step, during which the control unit CU connected to the detector device DD carries out an activity chosen from the group consisting of: emitting an error signal ad a function of the (acquired) images; regulating the operating speed of the transfer conveyor assembly 8 (in particular, of the conveyor element 8') and/or the operating speed of the second conveyor 7 and/or the operating speed of the first conveyor 6 (in particular, of the first conveyor element) and/or the operation of the moving assembly 12 (for example, in order to move - rotate - the transfer conveyor 8 in one direction or in the opposite direction to shorten or lengthen - slightly - the path P and, for example, compensate for any empty areas) depending on the images (acquired); recording the (acquired) images within its own memory (and a combination thereof).

In particular, the method comprises a transfer step, during which the detector device DD transfers the (acquired) images to the control unit CU.

For example, the error signal can be used to automatically suspend the operation of the conveyors and/or to have an operator intervene.

Advantageously but not necessarily, during the management step, the control unit CU compares the (acquired) images with reference images.

According to some non-limiting embodiments, the method (in particular, the management step) comprises an evaluation step, during which the control unit CU (connected to the detector device DD) evaluates the orientation and/or the position of the cigarettes 2 in the (acquired) images, in particular by comparing the (acquired) images with reference images, in particular to identify (and report) any incorrect positions of the articles 2 and/or the forming of empty spaces (at the aforementioned area of the transfer section IS).

In particular, during the management step, the control unit CU (connected to the detector device DD) emits an error signal as a function of the images (acquired), evaluating the orientation and/or position of the cigarettes 2 in the images (acquired), in particular by comparing the (acquired) images with reference images.

Alternatively, or in addition, during the management step, the control unit CU, connected to the detector device DD, regulates the operating speed of the transfer conveyor assembly 8 (in particular, of the conveyor element 8') according to the (captured) images, in particular by comparing the (captured) images with the reference images.

Alternatively, or in addition, during the management step, the control unit CU, connected to the detector device DD, records the images (acquired) within its own memory.

According to some non-limiting embodiments, the method comprises a second conveying step, during which a conveyor 7 feeds the articles 2 to the outlet station 5 along the section S2 of the path P arranged downstream of the first section S1. In particular, during the transfer step, the transfer conveyor assembly 8 conveys the articles 2 from the conveyor 6 to the conveyor 7 along the transfer section IS of the path P and has an outlet 10, arranged at the section S2 for feeding the articles 2 to the conveyor 7.

In particular, the method further comprises a movement step, which is at least partially simultaneous with the transfer step (and, in particular, at least partially simultaneous with the first conveying step) and during which the moving assembly 12 moves the transfer conveyor assembly 8 so as to move said inlet 9 and said outlet 10 along the conveyors 6 and 7, respectively. More precisely, the conveyor assembly 3 comprises the connecting device 9', which allows the passage of the articles 2 from the conveyor 6 to the transfer conveyor assembly 8 and is mobile on the conveyor 6; and a connecting device 10', which allows the passage of the articles 2 from the transfer conveyor assembly 8 to the conveyor 7 and is mobile on the conveyor 7. The conveyor assembly 3 conveys the articles 2 from the inlet station 4 to the outlet station 5 along the path P having a variable length.

Advantageously but not necessarily, the detector device DD acquires images of the articles 2 arranged at said inlet 9, in particular, at the connecting device 9' (in particular, during at least part of the transfer step; more particularly, during at least part of the first conveying step; namely, while the articles 2 are conveyed).

Advantageously but not necessarily, the method is implemented by a conveyor assembly 3 as defined above.

LIST OF THE REFERENCE NUMBERS OF THE FIGURE

1 storage unit

2 articles

3 conveyor assembly

4 inlet station

5 outlet station

6 conveyor

7 conveyor

8 transfer conveyor assembly

9 inlet

10 outlet

11 advancement device

12 moving assembly

13 pulley

14 pulley

15 pulley

16 advancement device

17 plate

18 slots

19 flat supports

20 slots

21 diverter belt

22 diverter belt

23 motorized pulley 24 motorized pulley

25 conveyor element

26 conveyor element

27 guide

28 recess

29 guide

30 support structure

31 base

32 column

33 support assembly

34 support assembly

35 bearing

36 fixed portion

37 movable portion

38 arms

42 central element

43 central element

44 distal portion

45 distal portion

46 depression

47 depression

48 prong

49 prong

50 lower roller

51 lower roller

52 hinge

53 hinge

2' void

2" article

8' conveyor element

9' connecting device

10' connecting device

16' pulleys

9" centring elements 10" centring elements A axis P path

51 section

52 section

IS transfer section SC1 connecting section

SC2 connecting section

AT active section

PT passive section

DD detector device CU control unit

Claims

1. A conveyor assembly (3) for conveying substantially cylindrical articles (2), in particular from the tobacco processing industry; the conveyor assembly (3) is configured to convey the articles (2) from an inlet station (4) to an outlet station (5) along a path (P) (in particular, having a variable length); the conveyor assembly (3) comprises at least one first conveyor (6), which is configured to advance the articles (2) from the inlet station (4) along a first section (S1) of the path (P); and at least one transfer conveyor assembly (8), which is configured to convey the articles (2) from the first conveyor (6) along a transfer section (IS) of the path (P) and has an inlet (9), arranged at the first section (S1) for receiving the articles (2) from the first conveyor (6); the first section (S1) extends from the inlet station (4) to the inlet (9); the first conveyor (6) comprises at least one first conveyor element (25) (in particular, a belt, a strap and/or a chain) to feed said articles (2) to the inlet (9); the transfer conveyor assembly (8) comprises at least one second conveyor element (8') (in particular, a belt, a strap and/or a chain) configured to convey the articles (2) from the inlet (9) along at least one portion of the transfer section (IS); the conveyor assembly (3) comprises a detector device (DD), which is configured to acquire images of at least one area of the transfer section (IS) and of the articles (2) arranged at said area of the transfer section (IS).

2. The conveyor assembly (3) according to claim 1, and comprising at least one second conveyor (7), which is configured to feed the articles (2) to the outlet station (5) along a second section (S2) of the path (P); the transfer conveyor assembly (8) is configured to convey the articles (2) from the first conveyor (6) to the second conveyor (7) along the transfer section (IS) of the path (P) and has an outlet (10), arranged at the second section (S2) for feeding the articles (2) to the second conveyor

(7); the second section (S2) extends from outlet (10) to the outlet station (5); the conveyor assembly (3) further comprises a moving assembly (12) for moving the transfer conveyor assembly (8) so as to move said inlet (9) and said outlet (10) along the first and, the second conveyor (6, 7), respectively; the conveyor assembly (3) comprising a first connecting device (9'), which is configured to allow the passage of the articles (2) from the first conveyor (6) to the transfer conveyor assembly

(8) and is movable on the first conveyor (6); and a second connecting device (10'), which is configured to allow the passage of the articles (2) from the transfer conveyor assembly (8) to the second conveyor (7) and is movable on the second conveyor (7); the path (P) having a variable length.

3. The conveyor assembly (3) according to claim 1 or 2, wherein the detector device (DD) is configured to acquire images of the articles (2) arranged at the inlet (9), in particular, at the first connecting device (9').

4. The conveyor assembly (3) according to any of the preceding claims, and comprising a control unit (CU), which is connected to the detector device (DD) and is configured to emit an error signal as a function of said images, in particular by evaluating the orientation and/or position of the articles (2) in the images; the detector device (DD) being configured to transfer the images to the control unit (CU).

5. The conveyor assembly (3) according to any one of the preceding claims, and comprising a control unit (CU), which is connected to the detector device (DD) and is configured to regulate the operating speed of the transfer conveyor assembly (8) (in particular, of the second conveyor element) and/or the operating speed of the first conveyor (6) (in particular, of the first conveyor element) and/or the operation of the moving assembly (12) as a function of said images; the detector device (DD) being configured to transfer the images to the control unit (CU).

6. The conveyor assembly (3) according to any one of the preceding claims, and comprising a control unit (CU), which is connected to the detector device (DD) and comprises a memory configured to store said images; the detector device (DD) being configured to transfer the images to the control unit (CU).

7. The conveyor assembly (3) according to any one of the preceding claims, wherein the first conveyor element (25) is configured to at least partially accompany the articles (2) along at least part of said first section (S1); the second conveyor element (8') is configured to at least partially accompany the articles (2) along at least part of said transfer section (IS); in particular, the first conveyor element (25) is selected from the group consisting of: a belt, a strap, a chain, and a combination thereof; in particular, the second conveyor element (8') is selected from the group consisting of: a belt, a strap, a chain, and a combination thereof.

8. The conveyor assembly (3) according to claim 2, wherein the moving assembly (12) is configured to move the transfer conveyor assembly (8) so as to move said inlet (9) and said outlet (10) along the first and the second conveyor (6, 7), respectively, and vary the length of the transfer section (IS) and of the first and second sections (S1, S2); the first conveyor (6) has at least one winding; the second conveyor (7) has at least one winding; the moving assembly (12) is configured to move the transfer conveyor assembly (8) so as to move said inlet (9) and said outlet (10) along the first and the second conveyor (6, 7), respectively; in particular, the conveyor assembly (3) comprises the first connecting device (9') and the second connecting device (10').

9. The conveyor assembly (3) according to claim 8, wherein the first and second conveyors (6, 7) have windings substantially coaxial with one another; in particular, the first conveyor (6) has a plurality of first windings; the second conveyor (7) has a plurality of second windings having the same radius and the same pitch as the first windings.

10. The conveyor assembly (3) according to any one of the preceding claims, wherein the first and second conveyors (6, 7) are arranged so that one is at least partially above the other, in particular the second conveyor (7) is arranged at least partially above the first conveyor (6); said transfer section (IS) presenting at least one portion extending upwards (in particular, vertically); in particular, the winding direction of the first conveyor (6) is opposite to the winding direction of the second conveyor (7).

11. The conveyor assembly (3) according to any one of the preceding claims, wherein the detector device (DD) is configured to detect incorrect positions of the articles (2) and/or empty spaces at said area of the transfer section (IS).

12. A method for conveying articles (2), in particular substantially cylindrical articles of the tobacco processing industry, from an inlet station (4) to an outlet station (5) along a path (P) (in particular, having a variable length); the method comprises: a first conveying step, during which at least one first conveyor element (25) of a first conveyor (6) advances the articles (2) from the inlet station (4) along a first section (S1) of the path (P); a transfer step, during which a transfer conveyor assembly (8) conveys the articles (2) from the first conveyor (6) along a transfer section (IS) of the path (P) and has an inlet (9), arranged at the first section (S1) for receiving the articles (2) from the first conveyor (6); the first conveyor (6) comprises at least one first conveyor element (25) (in particular, a belt, a strap and/or a chain) that feeds said articles (2) to the inlet (9); the transfer conveyor assembly (8) comprises at least one second conveyor element (8') (in particular, a belt, a strap and/or a chain), which conveys the articles (2) from the inlet (9) along at least one portion of the transfer section (IS); a detector device (DD) acquires images of at least one area of the transfer section (IS) and of the articles (2) arranged at said area of the transfer section (IS).

13. The method according to claim 12, and comprising a management step, during which a control unit (CU) connected to the detector device (DD) carries out an activity selected from the group consisting of: emitting an error signal as a function of said images; adjusting the operating speed of the transfer conveyor assembly (8) (in particular, of the second conveyor element) and/or the operating speed of the first conveyor (6) (in particular, of the first conveyor element) and/or the operation of the moving assembly (12) as a function of said images; recording said images within its own memory; and a combination thereof.

14. The method according to claim 13, wherein, during the management step, the control unit (CU), connected to the detector device (DD), carries out said activity as a function of said images, by evaluating the orientation and/or or the position of said articles (2) in the images, in particular by comparing the images with reference images.

15. The method according to any one of claims 12 to 14, and comprising a second conveying step, during which a second conveyor (7) feeds the articles (2) to the outlet station (5) along a second section (S2) of the path (P) located downstream of the first section (S1); during the transfer step, the transfer conveyor assembly (8) conveys the articles (2) from the first conveyor (6) to the second conveyor (7) along the transfer section (IS) of the path (P) and has an outlet (10), arranged at the second section (S2) for feeding the articles (2) to the second conveyor (7); the method further comprises a moving step, which is at least partially simultaneous with the transfer step (and, in particular, at least partially simultaneous with the first conveying step) and during which a moving assembly (12) moves the transfer conveyor assembly (8) so as to move said inlet (9) and said outlet (10) along the first and the second conveyor (6, 7), respectively; the conveyor assembly (3) comprising a first connecting device (9'), which allows the passage of the articles (2) from the first conveyor (6) to the transfer conveyor assembly (8) and is movable (moveable) on the first conveyor (6); and a second connecting device (10'), which allows the passage of the articles (2) from the transfer conveyor assembly (8) to the second conveyor (7) and is movable (moveable) on the second conveyor (7); the conveyor assembly (3) conveys the articles (2) from the inlet station (4) to the outlet station (5) along the path (P) having a variable length.

16. The method according to any one of claims 12 to 15, wherein the detector device (DD) acquires images of the articles (2) arranged at said inlet (9), in particular, at the connecting device (9').

17. The method according to any one of claims 12 to 16, wherein the detector device (DD) detects incorrect positions of the articles (2) and/or empty spaces at said area of the transfer section (IS).

18. The method according to any one of claims 12 to 17, and implemented by a conveyor assembly (3) as defined according to any one of claims 1 to 11.