WO2023057873A1

WO2023057873A1 - Device for lifting and handling loads, for instance cellulose rolls

Info

Publication number: WO2023057873A1
Application number: PCT/IB2022/059408
Authority: WO
Inventors: Claudio IANNIELLO
Original assignee: Fucina Italia S.R.L.
Priority date: 2021-10-04
Filing date: 2022-10-03
Publication date: 2023-04-13
Also published as: IT202100025379A1

Abstract

The present invention relates to a device and a system for lifting and handling loads, for instance cellulose rolls, comprising: an elongated tubular-shaped container element (11) having a longitudinal axis (Y), as well as a first end (111) and a second end (112), a movable element (12) sliding in said container element (11) and having a first operative end (121) protruding with respect to the first end (111) of the container element (11), retainment elements (13) in shape coupling with an outer surface of the first operative end (121) of said movable element (12) and reversibly radially expandable with respect to the longitudinal axis (Y) further to the movement of the movable element (12) away from and towards the second end (112) of the container element (11).

Description

Title: Device for lifting and handling loads, for instance cellulose rolls

DESCRIPTION

Field of application

In its more general aspect, the present invention relates to the lifting and handling of loads derived from forest products and in the context of all of those activities linked to the transport and handling of goods.

By way of example, we can mention the loading and/or unloading of forest products from cargo ships in the context of maritime transport.

More particularly, the present invention relates to a device for lifting and handling heavy cellulose rolls, such as for instance rolls commercially known under the acronym “KLB 4”.

Moreover, the present invention also relates to a system for lifting and handling cellulose rolls comprising said device.

Prior art

In the context of sea freight transport, the transport of forest products (cellulose, kraft paper rolls and timber) is one of the fastest growing fields in recent years. Among the forest products, cellulose is of considerable commercial importance, being fundamental for the manufacture of paper, for the preparation of derivatives used in the production of textile fibers, plastics, and explosives.

To be transported from the place of production to the one of use, cellulose is first dehydrated and dried and then can be cut into sheets and packaged in bales or rolled around a hollow core thus forming cellulose rolls, such as “KLB 4” rolls, which are particularly heavy.

The loading and unloading of cellulose from cargo ships take place through the use of cranes suitably equipped and controlled by operators who, in the unloading phase, load the cellulose on trucks assigned to transfer the cellulose by land to the port warehouses. This unloading process takes a long time and many operators, given the limited capacity of a truck (about 30t) compared to the capacity of a cargo ship (about 15000t-40000t), for this reason a high productivity of the cellulose loading/unloading processes is essential to ensure efficient cellulose handling both in terms of time and costs.

As a result, devices and systems would be required for being used in the loading/unloading process of cellulose rolls suitable to ensure productivity and efficiency adequate to the growing demand for the transport of said product in the global market.

However, the prior art has not yet proposed specific solutions able to meet the needs of speed and efficiency in the loading and unloading of these products.

A known solution for lifting heavy loads is described in European patent no. EP 2 982 628 Al, which relates to a device that operates with compressed air, taken from a chamber 53 provided in the hub 5, to axially move an inner core 50 that activates an annular flange 58 which can expand radially.

Though advantageous, this solution is not so very reliable for loads greater than a predetermined weight.

Other technical solutions described for instance in US patent applications No. US 4,564,231 and US 3,905,636 are rather dated and not applicable to situations where it is necessary to provide for very compact dimensions of the lifting device.

Summary of the invention

The technical problem underlying the present invention is to provide and realize a device, controlled for instance through a pneumatic actuator, for lifting and handling loads, such as cellulose rolls, which allows increasing the productivity of the loading/ unloading process.

Another purpose of the present invention is to provide a device for lifting and handling loads of cellulose rolls, which is light, reliable, and resistant to the most aggressive atmospheric agents.

A further purpose of the invention is to provide an integrated system which implies the above device for an improved management of the entire loading and unloading process.

These purposes are attained through a device for lifting and handling loads, for instance cellulose rolls, comprising: an elongated tubular-shaped container element having a longitudinal axis, as well as a first end and a second end, a movable element sliding in said container element and having a first operative end protruding with respect to the first end of the container element, retainment elements in shape coupling with the outer surface of the first operative end of said movable element and reversibly radially expandable with respect to the longitudinal axis (Y) between a closed position and an open position further to the movement of the movable element away from or towards the first end of the container element.

Advantageously, the device is particularly reliable and quick in the transition from the working to the rest configuration and vice versa thanks to an actuation through a pneumatic force.

In an embodiment of the device the above retainment elements are activated as an expansion anchor in contrast to elastic means.

According to another embodiment, said movable element is structured with a stem and an intermediate plunger or piston and the device further comprising a fluid inlet port and a fluid outlet port with related supply and exhaust ducts alternatively activated by the movement of the plunger.

In another preferred embodiment of the device, the shape coupling between the first operative end of the movable element and the retainment elements is implemented through a conical-shaped end operative element.

Advantageously this allows quickly replacing the end element in case of wear or damage.

In a preferred embodiment of the device, the retainment elements have annular grooves on the outer surface, which are adapted to house elastic means to promote the return of said retainment elements to the closed or rest position.

According to another embodiment, the retainment elements comprise at least two complementary portions fixed close to the first end of the container element by means of a coupling between slots and respective fixing pins.

According to a further embodiment, the fixing of the retainment elements to the container element is obtained by means of a lower head element having a first end, with a portion protruding with respect to the first end of the container element, and a second end in tight coupling with the container element.

In another embodiment, the device further comprises an upper head element having a first end, in tight coupling with the container element, and a second end with a flange portion protruding with respect to the second end of said container element.

In an embodiment, the flange protruding portion of the upper head element has an abutment portion adapted to come into contact with a cellulose roll to be handled. According to an embodiment, the fluid outlet port is placed on the second end of the upper head element and a fluid duct runs internally to said upper head, thus putting the space of the plunger and the fluid outlet port in fluid communication.

According to another embodiment, the fluid inlet port is placed on the second end of the movable element and a fluid duct runs internally to the stem of the movable element, thus putting the space of the plunger and the fluid inlet port in fluid communication.

In a further embodiment, the movable element of the device further comprises hooking elements for the connection to a lifting and handling system.

Advantageously, this allows quickly connecting the device to a handling crossbar.

Moreover, the present invention also relates to a system for lifting and handling loads of cellulose rolls comprising at least one device made according to the embodiments, or combinations thereof, herein disclosed.

According to an embodiment, the system for lifting and handling cellulose rolls comprises: at least one crossbar, at least one lifting and handling device hanging on the crossbar; a pneumatic command and control system; flexible hoses which allow the fluid communication between the at least one device and the pneumatic command and control system through the fluid ports.

In a further embodiment, the system for lifting and handling cellulose rolls may further comprise hooking means for connecting the at least one device to the crossbar through a hooking element provided on the device itself.

Advantageously, this allows connecting in parallel more devices to the same crossbar and the simultaneous lifting of multiple cellulose rolls, thus increasing the productivity of the loading and unloading processes of cellulose rolls.

Advantageously, moreover this allows adapting the system to the specific needs of each single application.

In even another embodiment, the system for lifting and handling cellulose rolls may comprise a signaling element.

Advantageously, this allows using the system for lifting and handling cellulose rolls according to any embodiment of the present invention, ensuring safety of the operators present.

Further features and advantages of the present invention will be apparent from the following description of some embodiments given by way of nonlimiting example with reference to the enclosed drawings.

Brief description of the drawings

In these drawings:

- Figure la shows a frontal view of the device for lifting and handling loads in a rest configuration according to an embodiment of the present invention;

- Figure lb shows a further frontal view of the device of Figure la in an operative configuration according to an embodiment of the present invention;

- Figure 2 shows a schematic view in longitudinal section of the device according to the invention; - Figure 3a shows a section of the device represented in Fig. la, namely in the rest configuration;

- Figure 3b shows a section of the device represented in Fig. lb, namely in the operative configuration;

- Figure 4 shows the diagram of a lifting and handling system comprising at least one device represented in Figures la and 3a;

- Figures 5A to 5D show respective schematic examples of phases of use of a system for lifting and handling cellulose rolls comprising the device represented in Figures la-b, 2 and 3a-b.

For a better comprehension and clarity of the figures, the elements therein represented may not be on a scale representative of reality. Moreover, analogous elements in the figures will be identified by analogous reference numbers.

Detailed description

With reference to Figures la- lb, 2 and 3a-3b, a pneumatic device for lifting and handling loads, for instance cellulose rolls, will now be described in detail according to an embodiment of the present invention, said device being wholly indicated with reference number 1.

The device 1 comprises a container element 11 or an elongated jacket, a movable element 12 sliding internally to the container, expandable retainment elements 13, a lower head 14 and an upper head 15.

The container element 11 or jacket has an elongates tubular shape with respect to a longitudinal axis Y and has a first end 111 and a second end 112, which could also be defined as proximal and distal since they refer to the interconnection point with the load. The transversal section of the container element 11 is circular-shaped, in other embodiments not shown in the present invention the transversal section of the container element 11 could have any suitable shape, such as for instance oval, squared, rectangular, etc.

The movable element 12, contained in said container element 11, comprises a stem 123 or rod and a plunger or piston 124, which are integral to each other so as to form a piston structure. However, the plunger 124 is located in an intermediate position on the stem 123 which has a first operative end 121 protruding with respect to the first end 111 of the container tube 11. During the operation, a movement of the plunger 124 causes an axial sliding of the stem 123 along the longitudinal axis Y.

In a preferred embodiment, an end operative element 125 is fixed to the first operative end 121 of the movable element 12 This end operative element 125 has a hollow conical shape, actually a chalice, inside which a rubber plug 126, adapted to cushion shocks during the use of the device 1, may be optionally fixed, as it will become apparent from the following description.

In another preferred embodiment, the end operative element 125 has threaded holes, which are orthogonal with respect to the direction of the longitudinal axis Y, on the side surface for the insertion of grains that prevent any rotation of the movable element 12 during the use of the device 1.

In other embodiments not shown in the present invention, the first operative end 121 of the movable element 12 could be suitably shaped to carry out the function of said end element 125, which thus could be formed with it.

The second and opposite distal end 122 of said movable element 12 instead has a fluid inlet port 161 in communication with a fluid supply duct 163 which runs internally to the stem 123, between an end thereof, substantially corresponding to the second end 122 of the movable element 12, and an intermediate point 127 arranged along the stem 123, thus putting the plunger 124 and the fluid inlet port 161 in fluid communication . In the embodiment example herein described by way of indicative and non-limiting example, the fluid used to handle the device 1 is compressed air. This allows the device 1 to be particularly quick and reactive to the ai pneumatic commands received.

The retainment elements 13 comprise at least two semicircular valve complementary portions 132a, 132b fixed to respective fixing points or pins 131a, 131b. Said portions 132a, 132b may be independent from each other or semi-independent for instance if connected through a spring mechanism or the like.

In the embodiment herein described, said retainment elements 13 are connected to the first proximal end 111 of said container element 11 by means of a head 14 which they are fixed to at fixing pins 131a, 131b. More particularly, said retainment elements 13 are movable, namely free to slide and/or rotate, with respect to said fixing pins 131a, 131b due to respective slots 135a, 135b wherein the pins are housed, and which allow the retainment elements to expand as an expansion anchor when the thrust of the conical-shaped end operative element 125 is exerted there between.

The inner surface of said retainment elements 13 is suitably shaped to enter into shape coupling with the end operative element 125 fixed to the first operative end 121 of the movable element 12 or, in an alternative embodiment not shown, to enter into shape coupling directly with the first end 121 of the movable element 12.

The outer surface of said retainment elements 13 has some semi-annular grooves 133 adapted to house elastic elements or means 134, such as for instance elastic rings of the O-RING type, adapted to promote the return of said retainment elements 13 to the closed or rest position. The number of the grooves 133 and the number of the elastic rings 134 may be chosen based on the size of the end operative element 125 and on the specific application of use of the device 1. The above mentioned lower head 14 has a second cap inner portion 142 interna adapted to close the first end 1 11 of the container element 11 through a tight or interference coupling. This portion 142 has a central through-hole to allow the passage of the stem 123 of the movable element 12 but actually it is also the end-stroke of the plunger 124 inside the container 11.

The lower head 14 has an end 141 external to the container 11 with a portion 143 further protruding with respect to the first end 111 of the container element 11, said protruding portion 143 allowing fixing said retainment elements 13 at said fixing points 131.

In an embodiment not shown of the present invention, the first end 111 of the container element 11 could be suitably shaped to carry out itself the function of said lower head 14, which therefore could not be structurally independent, and said retainment elements 13 could be fixed directly to said first end 111.

The upper head 15 has a first end 151 adapted to close the second end 112 of the container element 11 through a tight coupling and has a through-hole to allow the passage of the stem 123 of the movable element 12. The first end 151 of the upper head 15 further has a flange portion 153 protruding with respect to the second end 112 of the container element 11, said flange protruding portion 153 having an abutment portion 154 adapted to abut against a surface of a load, such as for instance a cellulose roll to be handled, when the device 1 is in use.

Still at the first end 151 of the upper head 15 a fluid outlet port 162 is arranged, whereas a fluid exhaust duct 164 runs internally to the side wall 154 of the upper head 15, between its first end 151 and its second end 152, thus putting the plunger 124 and the fluid outlet port 162 in fluid communication.

In an embodiment not shown of the present invention, the second end 112 of the container element 11 could be suitably shaped to carry out the function of said upper head 15, which therefore could be omitted.

In this embodiment, the second portion 142 of the lower head 14 and the first end 151 of the upper head 15 define and delimit a plunger chamber 128 inside the container element 11 wherein the plunger 124 moves due to the inlet of the fluid through the fluid inlet port 161 and the outlet of the fluid through the fluid outlet port 162, thus generating a respective sliding of the stem 123 of the movable element 12 along the longitudinal axis Y.

When in use, the device 1 is able to pass from a rest configuration, shown in Figures la and 3a, to an operative or work configuration, shown in Figures lb and 3b. In the work configuration of the device 1, the retainment elements 13 are in an expanded or open position, due to the thrust in expansion exerted by the end operative element 125 of the movable element 12 towards the distal direction from the load, namely towards the second distal end 112 of the container element 11; differently, in the rest configuration of the device 1, the retainment elements 13 are in the closed or release position, due to an advancement movement of the movable element 12 towards the first proximal end 111 of the container element 11.

To pass from the rest configuration, shown in Figure 3a, to the work configuration, shown in Figure 3b, it is necessary for a fluid to enter the chamber 128 of the plunger 124 through the fluid inlet port 161 and the fluid duct 163 between the plunger 124 and the end stroke 142. The fluid inlet generates a pressure on the plunger 124, which moves towards the first end 151 of the upper head 15; since the plunger 124 is integral with the stem 123 and with the end element 125, the movable element 12 as a whole slide and draws back towards the second end 112 of the container element 11. The shape coupling between the end element 125 and the retainment elements 13 causes them to slide/rotate with respect to the fixing points 131a, 131b actually expanding radially with respect to the Y axis and thus moving into the open position. Essentially, a recess of the conical chalice-shaped end 125 actually involves a gusset enlargement of the retainment elements 13, which radially expand, thus enlarging the diametral dimensions of the operative end of the device 1 with respect to the diameter of the container 11.

In the work configuration the retainment elements 13, thus expanded, come into contact with the inner surface of the core of the cellulose rolls and due to the side pressure exerted and to the imprint of the retaining elements on said surface, the device 1 becomes integral with the cellulose roll, which can thus be lifted and handled safely.

A person skilled in the art easily comprises that any other type of load could obviously be provided or equipped with a hole analogous to the core of the cellulose roll and thus allow inserting the operative end of the lifting device 1 , which would therefore be temporarily constrained to the load to be lifted.

To pass from the work configuration, shown in Figure 3b, to the rest configuration, shown in Figure 3a, it is necessary for the fluid to exit from the chamber of the plunger 128 through the fluid outlet port 162 and the fluid duct 164; the exit of the fluid frees the plunger 124 from the pressure, plunger 124 which may thus be retracted acting onto the stem 123 integral thereto, the shape coupling between the end element 125 and the retainment elements 13 causes them to slide/rotate with respect to the fixing points 131a, 131b, thus going back into the closed or rest position; the return of the retainment elements 13 to the closed position is also promoted by the action of the return elastic means 134.

In the rest configuration the retainment elements 13 are no longer radially expanded and do not come into contact with the inner surface of the core of the cellulose rolls. The device 1 in the rest position may be easily inserted into the core of the cellulose rolls to be expanded and perform their handling and, once the displacement has been made, the device 1 itself may be relaxed to be easily extracted from the core of the cellulose rolls at the end of the handling process. The device 1 according to the present embodiment is particularly reliable and particularly quick in the transition from the work configuration to the rest one and vice versa.

Advantageously, this allows an increase in the productivity of the loading and unloading processes.

The device 1 is preferably made of metal materials such as for instance alloy steel, high mechanical strength stainless steel, aluminum alloy, titanium alloy, and bronze, etc.

Advantageously, this makes the device 1 resistant to the most aggressive atmospheric agents, such as for instance the corrosive effect of salt, making it particularly suitable for applications in open spaces and/or environments close to marine environments.

With reference to Figure 4, an integrated system 2 for lifting and handling loads is now described, for instance loads derived from forest products. Said system 2 comprises at least one device 1, according to any one of the previously described embodiments, as well as a pneumatic command and control circuit 16, and flexible fluid supply and exhaust hoses 165, 166.

The pneumatic command and control circuit 16 is adapted to control the inlet and outlet of fluid from the device 1 through the fluid inlet 161 and outlet ports 162 and may be any pneumatic command and control circuit known in the art, therefore it may comprise for instance compressors, control valves, exhaust valves, pressure switches, fluid regulators, filters, fluid reservoirs, supply systems, control panels, etc.

Preferably, but not limitedly, the fluid used in the command and control circuit 16 is compressed air.

Should the system 2 comprise more than one device 1, said devices 1 may be managed in parallel through a suitable connection with the pneumatic command and control system 16. Advantageously, this allows activating multiple devices in parallel 1 and thus simultaneously lifting multiple cellulose rolls, thus increasing the productivity of the loading and unloading processes.

The flexible hoses 165, 166 are adapted to put the pneumatic command and control system 16 and the at least one device 1 in fluid communication and may comprise connectors or connection portions adapted to couple at an end with the fluid communication ports 161, 162 and at another end with the pneumatic command and control circuit 16.

Advantageously, this allows ensuring the compatibility of the system 2 with any pneumatic command and control system, even pre-existing.

Furthermore, the system 2 may comprise a lifting crossbar 21 and hooking means 22.

The lifting crossbar 21, handled for instance by means of a crane, allows hanging a plurality of devices 1 in a prefixed spaced relationship by means of respective hooking means 22. Each of said hooking means 22 is adapted to constrain an end 122 of the movable element 12 of the device 1 with the lifting crossbar 21. In this regard a hooking element 129 is provided, which is arranged at the end 122 of the movable element 12 of the device 1. Said hooking element 129 could be for instance a recess on the end 122 of the movable element 12 adapted to house and block an end of the hooking means 22.

Said hooking means 22 may comprise hooks, couplings, bells, connecting links, chains, cables, and the like. Preferably, said hooking means 22 and said flexible hoses 165, 166 are enclosed in a single protective sheath 221.

Advantageously, this allows an easier installation of the system 2 during the connection of the device 1 with the crossbar 21.

Furthermore, the system 2 may comprise a safety signaling element 23 adapted to signal the status of the pneumatic command and control circuit 16. The signaling element 23 could be for instance a flashing light that turns on with a steady light when the pneumatic command and control circuit 16 has reached the pressure necessary to bring the device 1 into the work configuration (retainment elements 13 in an enlarged position); again, the flashing light could blink for instance when the pneumatic command and control circuit 16 has reached the pressure necessary to bring device 1 into the rest configuration (retainment elements 13 in the closed position).

Advantageously, this allows using the system 2 always ensuring the safety of the operators present.

With reference to Figure 5, an example of use of a system 2 is now described, which comprises a device 1 during a handling process of a cellulose roll.

In the first phase I (Fig. 5A) of the handling process, the crossbar 21 is suitably positioned above the cellulose rolls 3 to be handled and, while an operator 50 brings the device 1 at the core 31 of the cellulose roll, the crossbar 21 is lowered until the abutment portion 154 of the upper head 15 of the device 1 comes into contact with the upper surface of the cellulose roll 3.

In the second phase II (Fig. 5B) of the handling process, the pneumatic command and control system 16 is actuated to reach the pressure necessary to bring the device 1 into the work configuration wherein the retainment elements 13 expand as an anchor due to the movement (or retreat) of the movable element 12 towards the second end 112 of the container element 11, namely towards the crossbar. In said work configuration the retainment elements 13 abut against the inner surface of the core 31 of the cellulose rolls 3 and, due to the side pressure exerted and to the imprint of the retainment elements 13 onto said surface, the device 1 becomes integral with the cellulose roll, which thus can be lifted and handed safely. In the third phase III (Fig. 5C) of the handling process, the cellulose roll 3 has been handled towards the desired position and thus the pneumatic command and control system 16 is actuated to reach the pressure necessary to bring the device 1 into the rest configuration wherein the retainment elements 13 are released and takes up a closed position again due to the movement of the movable element 12 towards the first end 111 of the container element 11, namely away from the crossbar and downwards due to the return exerted by the elastic rings 134. In said rest configuration the retainment elements 13 are no longer in contact with the inner surface of the core 31 of the cellulose rolls 3.

In the fourth phase IV (Fig. 5D) of the handling process, the device 1 is extracted from the cellulose core by lifting the crossbar 21 upwards and the system is again free to be used in handling other cellulose rolls 3.

In light of what has been described above, the system and device of the present invention allow eliminating the drawbacks which still affect the prior art solutions.

A person skilled in the art may make numerous changes and variants to the system and device according to the present invention, all of them by the way being comprised in the scope of protection of the appended claims.

Claims

1. Device for lifting and handling loads, for instance cellulose rolls, comprising: an elongated tubular- shaped container element (11) having a longitudinal axis (Y), as well as a first end (111) and a second end (112), a movable element (12) sliding in said container element (11) and having a first operative end (121) protruding with respect to the first end (111) of the container element (11), retainment elements (13) in shape coupling with an outer surface of the first operative end (121) of said movable element (12) and reversibly radially expandable with respect to the longitudinal axis (Y) between a closed position and an open position further to the movement of the movable element (12) away from and towards the second end (112) of the container element (11), characterized in that: said movable element (12) is structured with a stem (123) and an intermediate plunger (124) and the device further comprises a fluid inlet port (161) and a fluid outlet port (162) with related supply and exhaust ducts (163, 164) alternatively activated for the movement of the plunger (124), and wherein the fluid inlet port (161) is arranged on the second end (122) of the movable element (12) and a fluid duct (163) runs internally to the stem (123) of the movable element (12) thus putting a space of the plunger (124) and the fluid inlet port (161) in fluid communication .

2. Device according to claim 1, wherein said retainment elements (13) are activated as an expansion anchor in contrast to elastic means (134).

3. Device according to any one of the preceding claims, wherein the shape coupling between the first operative end (121) of the movable element (12) and the retainment elements (13) is implemented by means of a conical-shaped end operative element (125).

4. Device according to any one of the preceding claims, wherein said retainment elements (13) have grooves (133) on the outer surface, which are adapted to house elastic means (134) to promote the return of said retainment elements (13) to the closed or rest position.

5. Device according to any one of the preceding claims, wherein said retainment elements (13) comprise at least two complementary portions (132a, 132b) that are fixed close to the first end (111) of the container element (11) through a coupling between slots (135a, 135b) and respective fixing pins (131a, 131b).

6. Device according to any one of the preceding claims, wherein the fixing of the retainment elements (13) to the container element (11) is obtained by means of a lower head element (14) having a first end (141), with a portion (143) protruding with respect to the first end (111) of the container element (1 1), and a second end (142) in tight coupling with the container element (11).

7. Device according to any one of the preceding claims, wherein said device (1) further comprises an upper head element (15) having a first end, (151) in tight coupling with the container element (11), and a second end with a flange portion (153) protruding with respect to the second end (112) of said container element (11).

8. Device according to claim 7, wherein the flange protruding portion (153) of the upper head element (15) has an abutment portion (154) adapted to come into contact with a cellulose roll to be handled.

9. Device according to claim 7 or 8, wherein the fluid outlet port (162) is placed on the second end (152) of the upper head element (15) and a fluid duct (164) runs internally to said upper head (15), thus putting a space of the plunger (124) and the fluid outlet port (162) in fluid communication .

10. Device according to any one of the preceding claims, wherein the movable element (12) further comprises hooking elements (129) for the connection to a lifting and handling system.

11. System for lifting and handling loads, for instance cellulose rolls, comprising: a support crossbar (21), - at least one device (1) according to any one of the preceding claims, hanging on the crossbar (21), a pneumatic command and control system (16), and flexible hoses (165, 166), which allow the fluid communication between the at least one device (1) and the pneumatic command and control system.

12. System according to claim 11, further comprising: hooking means (22) for connecting the at least one device (1) to the crossbar (21) through a hooking element (129) provided on the device (1) itself.

13. System according to claim 11 or 12, further comprising a signaling (23) and safety control element.

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