System and method for undressing a pallet

Abstract

System (100) for undressing a pallet (500) of products (510), preferably arranged in layers on a base (520) or plate, said pallet (500) being coated with a protective film (550) for retaining and protecting the products (510) themselves, said film (550) adapted to cover the upper surface (501) and the side surface (502) of the pallet (500) preferably up to the base (520); said system (100) comprises cutting means (110) installed on an anthropomorphic robot (201) for cutting said protective film (550) so as to separate the film into two segments (550s), each comprising an upper flap (551s) of an upper portion (551) of film (550) at the upper surface (501) of the pallet (500) and a lower flap (552s) of a side portion (552) of film (550) at the side surface (502) of the pallet (500); the system (100) further comprises means for withdrawing (120) the protective film (550) and the withdrawing means are installed on the anthropomorphic robot (201) to distance said two segments (550s) from the pallet (500); characterised by comprising pressing means (130) adapted to be positioned on the upper surface (501) of the pallet (500) and exert a force which is directed orthogonally to said upper surface (501) of the pallet (500) and is carried out on a first or second portion (501a, 501b) of said upper surface (501), so as not to come into contact with the upper flap (551s) of the upper portion (551) of film (550) of the segment (550s) that is being withdrawn.

Description

[0001] "SYSTEM AND METHOD FOR UNDRESSING A PALLET"

[0002] Cross-Reference To Related Applications

[0003] This patent application claims priority from Italian patent application no . 102024000006424 filed on March 22 , 2024 , the entire disclosure of which is incorporated herein by reference .

[0004] Technical Field

[0005] The present invention falls within the field of undressing a palletised load . In particular, it relates to a system to ensure the withdrawal of the protective film of a palletised load .

[0006] Background

[0007] Packaging or, for example , bottling systems are fed with palletised loads consisting of various layers of products or containers surrounded by a heat-shrinkable or elastic envelope that covers said products .

[0008] Palletised load or pallet means a plurality of products preferably arranged in layers on a base , as a plate , generally made of wood or plastic . Between each layer there may be an insert , as a pad, made of plastic or cardboard, which helps the stability of the pallet . It is also possible for said pad to be positioned between the plate and the load .

[0009] A product containment cap may be present above the palletised load .

[0010] Prior to depalletising the product in the treatment lines , such as for example the filling lines i f it is a container like a bottle or a j ar, said pallet is stored and moved between the product production systems and the subsequent treatment systems . To guarantee the integrity and stability thereof during the various steps mentioned above , the pallet is generally wrapped with a protective film that defines an envelope in which the products are enclosed . Said film is generally of the plastic type .

[0011] In the case of containers for the food industry, the film completely wraps the products and the plate on which the load is supported to ensure that insects and dirt cannot get in, as well as to give stability to the palletised load .

[0012] Said envelope can be applied by wrapping the perimeter surface of the pallet with a stretchable film or by fitting a heat-shrinkable type film on the pallet so that it adheres to the perimeter surface of the pallet by heat-shrinking . Alternatively, the pallet can be wrapped in a stretch-hood type film, that i s fitted onto the pallet and adapts thanks to its elasticity characteristics , without the need to adhere by heat-shrinking .

[0013] Even a perimeter portion of the base of the pallet can be wrapped in the protective film .

[0014] The operation of withdrawing the protective film from the pallet , in j argon, is called as pallet undressing, and is very often performed manually . In fact , the variables linked to the stability of the product and the non-uni form adhesion of the protective film, to the risk of damaging the product and / or the pads , have always made undressing by automatic machines unreliable .

[0015] At the same time , however, manual undressing performed by one or more operators is an operation which, in addition to entailing risks in terms of the integrity of the palletised load, also entails risks in terms of safety of the operator . In fact , during undressing, the operator may find him / hersel f in a dangerous situation due to possible products falling of f while they are dragged by the withdrawn film .

[0016] In order to overcome this drawback, some automatic means and methods for undressing pallets are known in the state of the art .

[0017] Said means and methods have a series of problems , in particular when the pallet load comprises many unstable and fragile products , such as for example pallets of glass bottles .

[0018] Especially in the case of undressing with heat- shrinkable type films , the main problem of the known machines is that said plastic film has creases or folds changing, from area to area , the behaviour o f the film during cutting and tearing and the relative behaviour of the load during the unwinding process . As a result , the load may tilt , get caught in the film, and partial dropping of the loaded bottles may also occur .

[0019] In particular, patent application WO2022153184 discloses a method that provides a separation of said protective film into at least two segments , each comprising an upper flap of an upper portion of film at the upper surface of the pallet and a lower flap of a side portion of film at the side surface of the pallet .

[0020] Thanks to this solution, the detachment of the film from the pallet is facilitated reducing product fall .

[0021] This solution does not always guarantee detachment reliability, as it can happen that , when distancing the first or second segment of film from the pallet , the film gets caught in the product or in the pad between the layers or in the cap on the upper layer of the pallet . It has frequently been found that the heat-shrinking film gets caught in the openings at the edges of any cap covering the upper layer of the pallet . It can therefore happen that , when the first or second film segment is distanced from the pallet , this causes the cap and consequently the product layer ( i f not also a large part of the products on the pallet ) to be dragged along .

[0022] Another frequently encountered problem is due to the fact that the neck of the bottle can come out of the openings at the edges of said cap, placed on the upper layer of the pallet , and can puncture the film up to the point of coming out therefrom .

[0023] Therefore , it can happen that , when the first or second film segment is distanced from the pallet , this causes the bottle and consequently the cap and the product layer, i f not also a large part of the products on the pallet , to be dragged along .

[0024] Summary of the Invention

[0025] The technical problem underlying the present invention is to make available a method and a system for undressing a pallet of products , structurally and functionally conceived to overcome one or more of the above-mentioned limitations with reference to the above-mentioned known technique .

[0026] Within the scope of the aforementioned problem, a main obj ect of the invention is to develop a method and a system for undressing a pallet of products that allow to minimi ze the risk of fall of and damage to the palletised product and consequent system failures or stoppages .

[0027] A further obj ect of the invention is also to make available to the art a method and a system for undressing a pallet of products , as part of a reliable solution that can adapt to various conformations of films and pallets .

[0028] In particular, the invention provides a system for undressing a pallet of products preferably arranged in layers on a base or plate .

[0029] Said pallet is coated with a protective film for retaining and protecting the products .

[0030] Said film is adapted to cover the upper surface and the side surface of the pallet preferably up to the base .

[0031] Preferably, said system comprises cutting means installed on an anthropomorphic robot to cut said protective film .

[0032] Preferably, said protective film is separated into two segments .

[0033] Each of said segments comprises an upper flap of an upper portion of film at the upper surface of the pallet and a lower flap of a side portion o f film at the side surface of the pallet .

[0034] Preferably, the system further comprises means for withdrawing the protective film, that are installed on the anthropomorphic robot to distance said two segments from the pallet .

[0035] Preferably, the system further comprises pressing means adapted to be pos itioned on the upper surface of the pallet and exert a force directed orthogonally to said upper surface of the pallet .

[0036] Advantageously, said force is carried out on a first or second portion of said upper surface so as not to come into contact with the upper flap of the upper portion of film of the segment being withdrawn .

[0037] Preferably, the system comprises trans fer and / or support means configured to position the pallet in the working area of said at least one anthropomorphic robot .

[0038] Preferably, said trans fer and / or support means comprise a device rotating about a vertical axis and configured to rotate the pallet about its vertical symmetry axis .

[0039] Preferably, the pressing means comprise a pressing element which is rotatable , preferably about the vertical rotation axis of the rotating device .

[0040] Preferably, the pressing element is driven in rotation by contact friction with the upper surface of the pallet set in rotation about its symmetry axi s by the rotating device . Preferably, the pressing means comprise at least one actuator for bringing the pressing element from the first to the second portion of said upper surface of the pallet , with which it is to come into contact .

[0041] Preferably, the cutting means and the withdrawal means are installed on a single anthropomorphic robot .

[0042] Preferably, the system comprises a movement device on which the pressing means are installed for their translation in vertical and / or hori zontal direction .

[0043] Preferably, the system provides that the movement device and the anthropomorphic robot are arranged on opposite sides of the trans fer and / or support means with respect to the direction of advancement of the pallet .

[0044] In particular, the invention provides a method for undressing a pallet of products preferably arranged in layers on a base or plate , said pallet being coated with a protective film for retaining and protecting the products themselves , said film adapted to cover the upper surface and the side surface of the pallet preferably up to the base .

[0045] Preferably, said method provides for cutting the film by making two segments each comprising an upper flap of an upper portion of film at the upper surface of the pallet and a lower flap of a side portion o f film at the side surface of the pallet .

[0046] Said method provides for distancing said two segments from the pallet .

[0047] In particular, said method provides that the distancing of the first or second segment from the pallet takes place simultaneously with the exertion of a force which is directed orthogonally to the upper surface of the pallet and is carried out on a first or second portion of said upper surface that is opposite to the one from which the segment is distanced from the film .

[0048] Preferably, said method provides for contacting and retaining the upper flap of the upper portion of film of the second segment on the second portion, when the first segment is distanced from the pallet .

[0049] Preferably, said method provides for contacting the first portion of said upper surface , when the second segment is distanced from the pallet .

[0050] Preferably, said method provides for rotating the pallet about its vertical symmetry axis when the first and / or second segment is distanced from the pallet and the force is exerted in a direction orthogonal to the upper surface of the pallet .

[0051] Preferably, said method provides for rotating the pallet about its vertical symmetry axis when the cut is performed to separate the two segments .

[0052] Preferably, said method provides for performing the cutting to separate the two segments and it provides for distancing the two segments from the pallet by means of an anthropomorphic robot , and it preferably provides for exerting the force , directed orthogonally to the upper surface of the pallet , by a movement device independent of the robot .

[0053] These and other obj ects are achieved thanks to the features of the invention as set forth in the independent claims . The dependent claims outline preferred and / or particularly advantageous aspects of the invention .

[0054] Said obj ects and advantages are all achieved by the method and relative system for undressing a pallet of products , subj ect-matter of the present invention, which is characterised by what is provided for in the claims below .

[0055] Brief Description of the Drawings

[0056] This and other features will become more apparent from the following description of some preferred embodiments illustrated, by way of non-limiting example in the accompanying drawings .

[0057] Figure 1 : illustrates in axonometric view a pallet with visible cuts and hidden dashed cuts ;

[0058] Figure 2 : illustrates , in axonometric view, a pallet with cuts and related subdivision into two segments ;

[0059] Figure 3 : illustrates a plan view of an embodiment of a system for undressing pallets with an anthropomorphic robot and a movement device for pressing means ;

[0060] Figure 4a, 4b : illustrates an axonometric view of a movement device with pressing means .

[0061] Detailed Description of Preferred Embodiments

[0062] With particular reference to figure 3 , a kind of system 100 for undressing a pallet 500 of products 510 , preferably arranged in layers on a base or plate 520 , is depicted .

[0063] Said pallet 500 is coated with a protective film 550 for retaining and protecting the products 510 themselves . Said protective film 550 is configured to cover the upper surface 501 and the side surface 502 of the pallet 500 preferably at least up to the base 520 , so as to ensure greater sealing for stability and for insulation from the outside .

[0064] The pallet 500 can have various approximate dimensions , generally ranging from 600 x 800 mm up to 1120 x 1420 mm and height generally up to 3000 mm . The system 100 , described below, is able to process pallets 500 of various dimensions .

[0065] The protective fi lm 550 , therefore , comprises an upper portion 551 at the upper surface 501 of the pallet 500 and a side portion 552 at the side surface 502 of the pallet 500 . As depicted in Figures 1 and 2 , the side portion 552 extends on all the four sides 502a of the side surface 502 of the pallet 500 . Likewise , in Figure 2 , the four edges 502b of the side surface 502 are identi fied .

[0066] In particular, said system 100 comprises cutting means 110 for cutting the protective film 550 on the pallet 500 and preferably withdrawal means 120 for withdrawing the protective film 550 from the pallet 500 , once it has been cut .

[0067] According to an aspect of the invention, said cutting means 110 are installed on an anthropomorphic robot 201 for cutting the film 550 by defining and separating portions of said film 550 .

[0068] An anthropomorphic robot is defined as an automatically controlled, programmable system consisting of three or more axes .

[0069] Generally, two types of robots are distinguished : Cartesian robots and poly-articulated / anthropomorphic robots . The Cartesian system is a linear robot that moves along three orthogonal axes , according to Cartesian data, and consists of a series of linear actuators .

[0070] A poly-articulated / anthropomorphic robot moves in a three-dimensional environment thanks to rotoid j oints .

[0071] In particular, said cutting means 110 , moved by said anthropomorphic robot 201 , allow the protective film 550 to be separated into a plurality of segments 550s .

[0072] The term " segment" means a portion of protective film

[0073] 550 separated from the remaining film 550 by cutting . More precisely, according to a preferred embodiment , each segment 550s can comprise an upper flap 551 s of the upper portion

[0074] 551 of film 550 and a lower flap 552 s of the side portion

[0075] 552 of film 550 .

[0076] In accordance with an aspect of the invention, once all the cuts necessary to separate at least one segment 550s have been made , the withdrawal means 120 can operate , in order to distance said segment 550s of protective 550 from the pallet 500 .

[0077] It should be noted that the described sequence of the cuts is not binding .

[0078] According to an aspect of the invention, each segment 550s is distanced from the pallet 500 by the withdrawal means 120 , installed on the anthropomorphic robot 201 .

[0079] According to an embodiment , the withdrawal means 120 for distancing the segments 550s from the pallet 500 can be installed on the same anthropomorphic robot 201 , on which the cutting means 110 are also installed .

[0080] As regards the cutting means 110 , they preferably comprise a blade 111 .

[0081] We will not go into detail about the cutting means 110 , which can be made according to various ways to implement the invention . According to an aspect of the invention, the withdrawal means 120 comprise at least one grasping head 122 .

[0082] Said grasping head 122 is configured to distance and / or retain the segment 550s from the pallet 500 .

[0083] The withdrawal means 120 may further comprise at least one blocking device 125 adapted to securely retain a flap of the cut segment 550s that has previously been distanced from the pallet 500 by the grasping head 122 .

[0084] Said blocking device 125 is conformed so as to have a blocking capacity greater than the grasping head 122 so as to ensure the retention of the film 550 throughout the step of distancing from the pallet 500 .

[0085] We will not go into detail about the withdrawal means 120 , which can be made according to various ways to implement the invention .

[0086] According to one aspect of the invention, the system comprises trans fer and / or support means 170 configured to position the pallet 500 in the working area of said anthropomorphic robot 201 .

[0087] In particular, the base 520 of the pallet 500 rests on said trans fer and / or support means 170 , which are suitably configured to move the pallet 500 into the undressing position and to support it during undressing operations . We will not go into detail about said trans fer and / or support means 170 , as they are known to a person skilled in the art , as conveyors with chains , rollers , etc . which are chosen for example according to the type of the base 520 and / or the type of pallet 500 . Said trans fer and / or support means 170 have been only schematised in the figures . Advantageously, said trans fer and / or support means 170 comprise a device 171 rotating about a vertical axis Z and configured to rotate the pallet 500 about its vertical symmetry axis .

[0088] In particular, said rotating device 171 allows the rotation of the pallet 500 when it is positioned at the anthropomorphic robot 201 .

[0089] In fact , the reali zation of the segments 550s provides for performing the first , second and third cut 561t , 562t , 563t by means of a step sequence which also includes a step of rotation of the pallet 500 .

[0090] In this configuration, the rotating device 171 is configured to rotate the pallet 500 by at least 180 ° .

[0091] Said rotating device 171 , in particular, cooperates with the anthropomorphic robot 201 , on which the cutting means 110 and / or the withdrawal means 120 are installed .

[0092] The rotation of the pallet 500 allows a wide range of anthropomorphic robots to be used, even with a small working area . According to a preferred embodiment , the system 100 comprises pressing means 130 adapted to be positioned on the upper surface 501 of the pallet 500 and exert a force directed orthogonally to said upper surface 501 of the pallet

[0093] 500 . According to an aspect of the invention, said force , exerted by the pressing means 130 , is carried out onto a first or second portion 501a, 501b of said upper surface

[0094] 501 . In particular, onto only one portion at a time , so as not to contact the upper flap 551 s of the upper portion 551 of film 550 of the segment 550s that is being withdrawn .

[0095] In particular, the upper surface 501 can be divided into two halves , at the separation between the two segments 550s into which the film 550 is cut ; and the first and second portion 501a, 501b, on which the force of the pressing means 130 is exerted, can coincide with all or a part of these two opposite halves .

[0096] Thanks to said pressing means 130 , the risk of falling and damage to the palletised product is minimi zed, while the film 550 is being distanced from the pallet .

[0097] In fact , while the segment 550s is being withdrawn, it can happen that the film remains caught in the neck of a bottle , or in the corner of the base 520 and its di stancing from the pallet 500 involves exerting a force .

[0098] This force can cause instability of the products on the pallet 500 until causing their fall .

[0099] In fact , the heat-shrinking film 550 gets frequently caught in the openings present at the edges of a possible cap covering the upper layer of the pallet 500 . It can therefore happen that , when the first or second film 550s segment is distanced from the pallet 500 , this causes the cap and consequently the product layer, i f not also a large part of the products on the pallet 500 , to be dragged along .

[0100] Another frequently encountered problem is due to the fact that the neck of the bottle can come out of the openings at the edges of said cap placed on the upper layer of the pallet 500 and puncture the film 550 to the point o f coming out therefrom . It can therefore happen that , when the first or second segment of film 550s i s distanced from the pallet 500 , this causes the cap and consequently the product layer, i f not also a large part of the products of the pal let 500 , to be dragged along .

[0101] A preferred embodiment provides that the pressing means

[0102] 130 comprise a pressing element 131 .

[0103] Said pressing element 131 preferably has a planar conformation so as to rest on the upper surface 501 , which is planar .

[0104] Said pressing element 131 preferably has dimensions equal to , or less than, hal f of the upper surface 501 .

[0105] The greater the dimension of the contact element and the greater the stabili zation ef fect given by the pressing means 130 to the pallet 500 .

[0106] In the figure , a possible embodiment is represented in which the pressing element 131 has a rectangular shape .

[0107] Advantageously, said pressing element 131 may comprise a contact surface shaped to adapt to any irregularities of the upper surface 501 .

[0108] A preferred embodiment provides that the pres sing element 131 is rotatable .

[0109] According to a preferred aspect , said pressing element 131 is rotatable about the vertical axis Z .

[0110] Said vertical axis Z preferably coincides with the rotation axis of the rotating device 171 .

[0111] This allows the pressure to be exerted even during the rotation of the pallet 500 placed on the rotating device 171 , in the steps of withdrawing and distancing each segment 550s .

[0112] Preferably, the pressing element 131 is driven in rotation by contact friction with the upper surface 501 of the pallet 500 set in rotation about its symmetry axis by the rotating device 171 .

[0113] Therefore , it is a rotation of the pressing element 131 that does not take place independently, but constrained to the rotation of the pallet 500 on which it rests .

[0114] This simpli fies implementation and also ensures synchronisation thereof . Therefore , at the end of the withdrawal of one of the two segments 550s , the pressing element 131 is rotated with respect to the initial position it had assumed at the beginning of the withdrawal of said segment 550s .

[0115] It may be advantageous to rotate said pressing element 131 so as to return it to the initial position .

[0116] This can be useful especially when the pressing element 131 has dimensions similar to hal f of the upper surface 501 , because it allows to prevent it from coming into contact with the other segment 550s still to be withdrawn .

[0117] A preferred embodiment provides that the pressing means 130 comprise at least one actuator 133 , preferably pneumatic, which allows to rotate the pressing element 131 back to the initial position .

[0118] Said actuator 133 may comprise a valve , for example with centre put in communication with a di scharge , that allows the pressing element 131 to be controlled by the pneumatic actuator 133 , or to be free to rotate , moved by the contact with the pallet 500 , when in communication with the discharge .

[0119] Advantageously, said actuator 133 is configured to bring the pressing element 131 from the first to the second portion 501a, 501b of said upper surface 501 of the pallet 500 , with which it is to come into contact .

[0120] Preferably, said actuator 133 sets in rotation the pressing element 131 about the vertical axis Z that coincides with the rotation axis of the rotating device 171 .

[0121] Advantageously, the pressing means 130 can be installed on a movement device 135 for their translation in vertical and / or hori zontal direction .

[0122] Preferably, said movement device 135 is independent of the anthropomorphic robot 201 on which the cutting means 110 and the withdrawal means 120 are installed .

[0123] Said movement device 135 may be a frame 135 ' , on which the pressing element 131 is installed .

[0124] The figure depicts a possible embodiment of the frame 135 ' , of the Cartesian type , that is , moving on one or more orthogonal axes .

[0125] Preferably, said frame 135 ' comprises positioning means 132 for the movement in vertical direction and / or the translation on a hori zontal plane of the pressing element 131 .

[0126] Said positioning means 132 can be configured to move in vertical direction, li fting and lowering the pressing element 131 to the correct height so as to be positioned on the upper surface 501 of the pallet 500 .

[0127] Furthermore , said positioning means 132 can be configured to move the pressing element 131 on a hori zontal plane and bring it into the correct position at the first or second portion 501a, 501b of said upper surface 501 .

[0128] We do not go into detail of the embodiment of said positioning means 132 for li fting and / or translating the pressing element 131 , since the positioning means 132 may comprise electric, pneumatic, hydraulic actuators , etc . , and may be made according to various ways known to a person skilled in the art .

[0129] According to an aspect of the invention, the system 100 can be reali zed according to preferred configurations .

[0130] An embodiment depicted in Figure 3 provides that the cutting means 110 and the withdrawal means 120 are installed on a single anthropomorphic robot 201 .

[0131] This embodiment has the advantage of being economical and involving smaller installation layouts .

[0132] This embodiment allows the achievement of production rates of approximately 20 pallets / hour .

[0133] Advantageously, said system 100 may comprise a movement device 135 on which the pressing means 130 are installed for their translation in vertical and / or hori zontal direction .

[0134] Said movement device 135 is independent of the anthropomorphic robot 201 on which the cutting means 110 and the withdrawal means 120 are installed .

[0135] Said movement device 135 is preferably a frame 135 ' , of the Cartesian type .

[0136] As depicted in Figure 3 , the movement device 135 and the anthropomorphic robot 201 are preferably arranged on opposite sides of the trans fer and / or support means 170 with respect to the direction of advancement of the pallet 500 .

[0137] The working method achievable by means of the system 100 is also an obj ect of the invention .

[0138] Said method preferably provides for separating said protective film 550 by executing cuts of said film 550 adapted to make two segments 550s , as described above .

[0139] Said method provides for distancing said two segments 550s from the pallet 500 for their evacuation .

[0140] According to a preferred aspect , the method provides for distancing the first or second segment 550s from the pallet 500 simultaneously with the exertion of a force directed orthogonally to the upper surface 501 of the pallet 500 .

[0141] Preferably, said force is carried out on a first or second portion 501a, 501b of said upper surface 501 , opposite to the one from which the segment 550s is distanced from the film 550 during the withdrawal step . Advantageously, it is provided for contacting and retaining the upper flap 551 s of the upper portion 551 of film 550 of the second segment 550s on the second portion 501b, when the first segment 550s is distanced from the pallet 500 .

[0142] Therefore , a pre ferred operating cycle comprises the following steps : cutting the film 550 by making two 550s segments , optionally rotating the pallet 500 about its vertical symmetry axis , exerting a pressure on the pallet 500 , in particular by contacting and retaining the upper flap 551 s of the upper portion 551 of film 550 of the second segment 550s on the second portion 501b, withdrawing and distancing the first segment 550s from the pallet 500 , exerting a pressure on the pallet 500 , in particular by contacting the upper surface 501 of the pallet 500 on the first portion 501a, withdrawing and distancing the second segment 550s from the pallet 500 .

[0143] Optionally, said method provides for rotating the pallet 500 about its vertical symmetry axis when the first and / or second segment 550s is distanced from the pallet 500 .

[0144] Preferably, also the force directed orthogonally to the upper surface 501 of the pallet 500 is exerted simultaneously with the rotation of the pallet 500 .

[0145] According to the embodiment depicted in figure 3 , the method provides for performing the cut to separate the two segments 550s and provides for distancing the two segments 550s from the pal let 500 by means of a single anthropomorphic robot 201 . Preferably, the method according to said embodiment provides for exerting the force directed orthogonally to the upper surface 501 of the pal let 500 by a movement device 135 independent of the robot 201 . It is understood, however, that what is described above has an illustrative and non-limiting purpose ; therefore , possible variants of detail s , that may be necessary for technical and / or functional reasons , are considered falling within the same protective scope defined by the claims indicated below .

Claims

CLAIMS1.- System (100) for undressing a pallet (500) of products (510) , preferably arranged in layers on a base (520) or plate, said pallet (500) being coated with a protective film (550) for retaining and protecting the products (510) themselves, said film (550) adapted to cover the upper surface (501) and the side surface (502) of the pallet (500) preferably up to the base (520) , wherein said system (100) comprises cutting means (110) installed on an anthropomorphic robot (201) for cutting said protective film (550) so as to separate it into two segments (550s) , each comprising an upper flap (551s) of an upper portion (551) of film (550) at the upper surface (501) of the pallet (500) and a lower flap (552s) of a side portion (552) of film (550) at the side surface (502) of the pallet (500) , the system (100) further comprising means for withdrawing (120) the protective film (550) , the withdrawing means being installed on the anthropomorphic robot (201) to distance said two segments (550s) from the pallet (500) , characterised by comprising pressing means (130) adapted to be positioned onto the upper surface (501) of the pallet (500) and exert a force which is directed orthogonally to said upper surface (501) of the pallet (500) and is carried out on a first or second portion (501a, 501b) of said upper surface (501) so as not to come into contact with the upper flap (551s) of the upper portion (551) of film (550) of the segment (550s) that is being withdrawn.2.- The system (100) according to claim 1, comprising transfer and / or support means (170) configured to position the pallet (500) in the working area of said at least one anthropomorphic robot (201) , said transfer and / or supportmeans (170) comprising a device (171) rotating about a vertical axis (Z) and configured to rotate the pallet (500) about its vertical symmetry axis.3.- The system (100) according to any one of the preceding claims, wherein the pressing means (130) comprise a pressing element (131) which is rotatable, preferably about the vertical axis (Z) of rotation of the rotating device (171) .4.- The system (100) according to claim 3, wherein the pressing element (131) is driven in rotation by contact friction with the upper surface (501) of the pallet (500) , set in rotation about its symmetry axis by the rotating device ( 171 ) .5.- The system (100) according to any one of the preceding claims, wherein the pressing means (130) comprise at least one actuator (133) for bringing a pressing element (131) from the first to the second portion (501a, 501b) of said upper surface (501) of the pallet (500) with which it is to come into contact.6.- The system (100) according to any one of the preceding claims, wherein the cutting means (110) and the withdrawal means (120) are installed on a single anthropomorphic robot(201) .7.- The system (100) according to any one of the preceding claims, comprising a movement device (135) on which the pressing means (130) are installed for their translation in vertical and / or horizontal direction.8.- The system (100) according to claim 7, wherein the movement device (135) and the anthropomorphic robot (201) are arranged on opposite sides of the transfer and / or support means (170) with respect to the direction of advancement of the pallet ( 500 ) .9.- Method for undressing a pallet (500) of products (510) , preferably arranged in layers on a base (520) or plate, said pallet (500) being coated with a protective film(550) for retaining and protecting the products (510) themselves, said film (550) adapted to cover the upper surface (501) and the side surface (502) of the pallet (500) preferably up to the base (520) , wherein said method provides for cutting the film (550) by making two segments (550s) , each comprising an upper flap (551s) of an upper portion(551) of film (550) at the upper surface (501) of the pallet(500) and a lower flap (552s) of a side portion (552) of film (550) at the side surface (502) of the pallet (500) , and it provides for distancing said two segments (550s) from the pallet (500) , characterised in that distancing the first or second segment (550s) from the pallet (500) occurs simultaneously with the exertion of a force which is directed orthogonally to the upper surface (501) of the pallet (500) and is carried out on a first or second portion (501a, 501b) of said upper surface (501) opposite to the one from which the segment (550s) of the film (550) is distanced.10.- The method according to claim 9, providing for contacting and retaining the upper flap (551s) of the upper portion (551) of film (550) of the second segment (550s) on the second portion (501b) , when the first segment (550s) is distanced from the pallet (500) , and preferably providing for contacting the first portion (501a) of said upper surface(501) when the second segment (550s) is distanced from the pallet ( 500 ) .

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