EP3558823B1 - Dispositif d'application de feuilles de recouvrement sur des charges palettisées - Google Patents

Dispositif d'application de feuilles de recouvrement sur des charges palettisées Download PDF

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Publication number
EP3558823B1
EP3558823B1 EP17832354.9A EP17832354A EP3558823B1 EP 3558823 B1 EP3558823 B1 EP 3558823B1 EP 17832354 A EP17832354 A EP 17832354A EP 3558823 B1 EP3558823 B1 EP 3558823B1
Authority
EP
European Patent Office
Prior art keywords
reel
palletized
sheet
machine according
edge
Prior art date
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Active
Application number
EP17832354.9A
Other languages
German (de)
English (en)
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EP3558823A1 (fr
Inventor
Gianluca SFORACCHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bema SRL
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Bema SRL
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Filing date
Publication date
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Publication of EP3558823A1 publication Critical patent/EP3558823A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/58—Applying two or more wrappers, e.g. in succession
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/58—Applying two or more wrappers, e.g. in succession
    • B65B11/585—Applying two or more wrappers, e.g. in succession to stacked articles, e.g. pallettised loads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/14—Feeding webs from rolls by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/20—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for adding cards, coupons or other inserts to package contents
    • B65B61/22—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for adding cards, coupons or other inserts to package contents for placing protecting sheets, plugs, or wads over contents, e.g. cotton-wool in bottles of pills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/14—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles
    • B65B2210/20—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles the web dispenser being mounted on a rotary arm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
    • B65D2571/00123—Bundling wrappers or trays
    • B65D2571/00648—Elements used to form the wrapper
    • B65D2571/00672—Films

Definitions

  • the present invention regards a machine for applying cover sheets on palletized loads and a method used with such a machine.
  • a machine for wrapping loads which have also corner boards placed on them is known e.g. from document US 5546730 .
  • the palletized loads i.e. the articles stacked on load pallets
  • the packaging field the palletized loads, i.e. the articles stacked on load pallets, are wrapped by automatic wrapping machines with suitable packaging films, so as to easily allow the transport of the articles and preserve the integrity thereof.
  • Such wrapping machines also comprise devices which apply cover sheets on the top of the palletized loads to be wrapped, so as to protect them from water or dust which could otherwise be deposited and/or penetrate within the loads themselves.
  • the wrapping machines can be of various type, e.g. with rotary table that supports the load to be wrapped, or of another type; depending on whether the wrapping of the palletized load must be anti-dust or anti-water, the film is wound around the load itself according to different modes.
  • the winding mode of anti-dust type provides that the film be wound starting from the top of the load in order to then descend towards the base, while the anti-water winding provides that, on the contrary, the film be wound starting from the base of the load in order to then ascend towards the top.
  • the film In both winding modes, the film must be applied in a manner so as to firmly block the upper cover sheet in position, in order to prevent the penetration of the weathering agents.
  • the device for applying the upper cover sheet comprises a portal structure, arranged above the line for advancing the palletized load through the machine.
  • the application device Upon passage of the load, and before carrying out the local winding with the film, the application device unwinds a sheet of predetermined length from a suitable reel supported in raised position, it cuts it to size and lays it down on the top of the load itself.
  • the application device In order to do this, the application device must be situated at the right distance from the top of the palletized load, which naturally varies from case to case.
  • the load arrives on top of a rotary table, and on the top of the same load a counter-table is positioned - it too rotatable - which maintains the cover sheet in the correct position in order to carry out the blocking thereof.
  • a winding head which supports a reel of film suitable for the lateral winding of the load, is brought close to the load itself; the winding head is rotated and the film, after having been suitably pre-stretched, is wound around the load according to the desired mode.
  • the above-described application device has disadvantages due, first of all, to the fact that, as stated, it is mounted above a bulky portal structure, which obliges various restrictions from the standpoint of the design of the machine layout: more in detail, its installation above the transport line of the palletized load requires providing for necessary spaces in the factory, and this clearly constrains the designer of the plant to make obliged choices.
  • the aim of the present invention is to improve the state of the art.
  • Another object of the present invention is to implement a machine that comprises a device for applying cover sheets on palletized loads that is more flexible and versatile than the machines that comprise a device of known type.
  • a further object of the present invention is to provide a machine that comprises a device for applying cover sheets on palletized loads which allows managing, in an optimal manner, the space available in the production factory.
  • Still another object of the present invention is to make a machine that comprises a device for applying cover sheets on palletized loads which allows facilitating the operations of maintenance and/or of substitution of the reel of material from which the cover sheets themselves are obtained.
  • the machine that comprises a device comprises at least one support for at least one palletized load, means for unwinding at least one reel of cover film from which a plurality of sheets to be applied on the palletized loads can be obtained, and at least one applicator member suitable for positioning, one-by-one, the cover sheets obtained from the reel on the top of respective palletized loads.
  • the applicator member comprises at least one robotic arm having at least one operative end, with which at least one grip member is associated that is suitable to pick up each cover sheet unwound from the reel at at least one edge, and to position it on the top of a respective palletized load.
  • reference number 1 overall indicates a device for applying cover sheets on palletized loads, according to the present invention.
  • the device 1 can be integrated in a wrapping machine M for palletized loads P, which also forms the object of the present invention.
  • the device 1 is illustrated together with the other groups or components of the wrapping machine M in which it is integrated; nevertheless, it is specified that the present invention specifically protects the device 1, also in a manner entirely independent from the other features of the wrapping machine M possibly including such device.
  • the device 1 comprises at least one support 2 for at least one palletized load P.
  • the support 2 defines the pre-established position in which the palletized load P is situated in order to be subjected to the application of a respective cover sheet C on the top.
  • Each of the palletized loads P arrives on the support 2, being moved along a specific advancement direction A.
  • the aforesaid advancement direction A can for example coincide with the advancement direction of the palletized loads P through the wrapping machine M which - possibly - comprises the device 1.
  • the device 1 also comprises means 3 for unwinding at least one reel of cover film B.
  • the unwinding means 3 can comprise cutting members for separating cover sheets C of the desired size.
  • cutting members are not represented in the figures but they can be of any type known for this specific application, or for similar applications.
  • the device 1 also comprises at least one applicator member 4.
  • the applicator member 4 is suitable for positioning the cover sheets C, one by one, obtained from the reel B on the top of respective palletized loads P.
  • the applicator member 4 comprises at least one robotic arm 5.
  • the robotic arm 5 comprises at least one operative end 5a, with which at least one grip member 6 is associated.
  • the grip member 6 is suitable to pick up each cover sheet C unwound from the reel B at at least one edge D thereof, and to position it on the top of a respective palletized load P, as will be better described hereinbelow.
  • the robotic arm 5 is constituted by mutually articulated portions, associated with respective rotary actuators, so as to position the operative end 5a in the desired points in space, and additionally so as to move the same operative end 5a from a starting point to an arrival point with the desired speed and acceleration.
  • the aforesaid starting point is typically constituted by the pickup point of the cover sheets C provided in the unwinding means 3; the aforesaid arrival point is instead typically constituted by a suitable position in proximity to the top of the palletized load P, in order to deposit the aforesaid sheet C thereon.
  • the robotic arm 5 also comprises a base 5b, opposite the operative end 5a, positioned alongside the support 2 of the palletized load P.
  • the base 5b can house the means for driving and controlling the robotic arm 5.
  • the base 5b of the robotic arm 5 can be situated, with respect to the support 2, in the position deemed optimal in relation to various aspects, including the overall planar bulk of the device 1, the modes of reaching the starting point and the arrival point of the operative end 5a of the robotic arm, the trajectory that the operative end 5a must travel in moving between the aforesaid points, and still other aspects.
  • the grip member 6 comprises a support element 7 for at least one first gripper 8 and one second gripper 9.
  • the first gripper 8 and the second gripper 9 are suitable to selectively grasp the edge D of the film of the reel B in at least two respective distinct points.
  • the support element 7 has elongated shape; for example, the support element 7 can be constituted by a section, for example made of light material.
  • Such section can have shape such to define seats - for example grooves or slots - for fixing the first gripper 8 and the second gripper 9 in the desired positions, for example at a specific distance from each other.
  • the support element 7 comprises at least one portion 7a of connection to the operative end 5a.
  • connection portion 7a can be fixed in a variable position along the support element 7; in this manner, it is possible to connect the support element 7 itself to the operative end 5a of the robotic arm 5 in the most opportune manner, in relation for example to the particular trajectory that the operative end 5a must complete and with regard to the mutual positioning of the parts.
  • the first gripper 8 and the second gripper 9 can be positioned at the opposite ends of the support element 7, for an improved grip of the edge D of the film of the reel B.
  • the grip member 6 also comprises a third gripper 10.
  • the third gripper 10 is connected to the support element 7, and is interposed between the first gripper 8 and the second gripper 9.
  • the grippers 8,9,10 can be positioned substantially equidistant from each other, for an optimal grip of the edge D of the film of the reel B.
  • Each of the grippers 8,9,10 - as shown in figures 6,7 - comprises a first member 11 and a second member 12, mutually movable between an open position and a closed position for gripping the edge D of the film of the reel B.
  • FIGs 6,7 in particular show one of the grippers 8,9,10 with the first member 11 and the second member 12 in closed position for gripping the edge D.
  • the first member 11 is fixed to the support element 7, while the second member 12 is movable with respect to the first member 11.
  • the first member 11 can be constituted by a section provided with grooves adapted for fixing to other parts, e.g. by means of screws or other connection members.
  • the second member 12 comprises a lever 12a articulated to the first member 11; the lever 12a is articulated to the first member 11 substantially in central position.
  • a terminal 12b is connected - which for example is made of plastic, rubber or another suitable material - intended for direct contact with the surface of the edge D of the film of the reel B.
  • the other end of the lever 12a is connected to an actuation member 13 for rotating the lever 12a between the open position and the closed position for gripping the edge D of the film of the reel B.
  • the actuation member 13 can for example be a pneumatic actuator, having the cylinder articulated to the first member, and the stem articulated to the lever 12a.
  • the actuation member 13 can nevertheless be of another type, for example an electric motor, or still other types.
  • the unwinding means 3 comprise means 14 for the selective locking of the edge D of the film of the reel B.
  • the selective locking means 14 are suitable to maintain the edge D in the correct position in order to allow the grip member 6 to grasp it, so as to pick up a cover sheet C.
  • the edge D of the film of the reel B is firmly retained and locked while awaiting for the grip member 6 to grasp it in order to pick up a cover sheet C.
  • the selective locking means 14 comprise at least one first element 15 and one second element 16.
  • the first element 15 and the second element 16 are mutually movable between a position of free passage of the film of the reel B, in which they are at a distance from each other, to a position of locking the film, in which they are instead in mutual contact so as to tighten the edge D therebetween.
  • the first element 15 and the second element 16 have respective corresponding first openings 15a and second openings 16a.
  • Such first openings 15a and second openings 16a allow the grip member 6 to grasp the edge D of the film of the reel B, in order to grasp and pick up the cover sheets C one by one.
  • the first openings 15a and the second openings 16a are respectively made in the first element 15 and in the second element 16, so as to mate with each other when the two elements 15,16 are in a position of locking the film of the reel B.
  • first element 15 comprises three respective first openings 15a
  • second element 16 comprises three corresponding respective second openings 16a.
  • first element 15 and second element 16 the respective first openings 15a and second openings 16a are positioned with respect to each other substantially at the same distance at which the grippers 8,9,10 of the grip member 6 are positioned with respect to each other.
  • the first openings 15a and the second openings 16a have a width sufficient to allow the easy insertion of the grippers 8,9,10, without risk of accidental impact.
  • the first openings 15a and the second openings 16a have relatively limited size, so as to prevent the edge D of the reel B from being twisted or crumpled accidentally and hence preventing the grip of the grippers 8,9,10 from being precarious or in any case incorrect.
  • the selective locking means 14 are mounted on a support frame 17 for the unwinding means 3.
  • the frame 17 is substantially shaped as a kind of elongated tank, within which the reel of cover film B is supported, in the manner better described hereinbelow.
  • the first element 15 and the second element 16 are supported at one of the edges of the frame 17, and in particular at the higher of the two edges of the frame 17 arranged according to its long sides.
  • the first element 15 and the second element 16 have substantially plate-like shape.
  • the first element 15 can be completely flat; the second element 16 can have the terminal edge 16, arranged according to the longer side, raised, so as to create a constraint against the exit of the edge D of the film of the reel B.
  • the first element 15 is fixed, while the second element 16 is movable with respect to the aforesaid first element 15, even if solutions could be provided in which the roles of the two elements 15,16 are reversed.
  • the second element 16 is rotatable around a rotation axis R parallel to that of the reel B of cover film.
  • the second element 16 is associated with at least one actuator 18, adapted to rotate the same second element 16 between the position of free passage of the film of the reel B and the selective locking position thereof.
  • the second element 16 is associated with two actuators 18; the two actuators 18 are for example provided at the ends of the support frame 17, but could be provided in other suitable positions.
  • each of the actuators 18 is of pneumatic type, and comprises a cylinder articulated to the frame 17 (in an opposite position with respect to that where the first element 15 is provided), and a stem articulated to the second element 16.
  • one or more actuators 18 of another type could be provided, for example comprising one or more electric motors, or still others.
  • the unwinding means 3 comprise at least one seat 19 for the reel of the cover film B.
  • the seat 19 is provided within the support frame 17, which as stated is substantially shaped as a tank or, more generally, as a container opened at the top.
  • the seat 19 could be made in a manner such to house the reel B with axis during use that is vertical.
  • the unwinding means 3 comprise two unwinder rollers 20,21, between which the film of the reel B passes, and in particular a first unwinder roller 20 and a second unwinder roller 21.
  • the first unwinder roller 20 is rotatably supported in the frame 17, and has the symmetry axis coinciding with the rotation axis R of the second element 16.
  • the second unwinder roller 21 is instead supported in a respective counter-frame 21a which, during use, is brought close to the frame 17, as shown in particular in figure 5 .
  • the unwinder rollers 20,21 can both be idle, or at least one of these can be associated with respective friction means, or adjustable braking means, or a respective rotation actuation means.
  • At least one from among the unwinder rollers 20,21 - e.g. the second unwinder roller 21 - can be provided with surface parts in relief made of (or covered with) high friction coefficient material, e.g. rubber, for a more effective driving of the film.
  • high friction coefficient material e.g. rubber
  • the seat 19 also comprises at least two support rollers 22,22a, with parallel axes, on which the reel of cover film B can roll.
  • the support rollers 22,22a are rotatable in the bottom of the support frame 17.
  • the reel B is abutted against the support rollers 22,22a, and the edge D thereof is passed between the unwinder rollers 20,21, in order to then be inserted between the selective locking means 14.
  • At least one of the two unwinder rollers 20,21 can be motorized in order to facilitate the unwinding of the reel B; alternatively, the unwinding of the reel B can be directly obtained due to the traction exerted on its edge D by the grip member 6 of the robotic arm 5.
  • the seat 19 for the reel B can be movable between at least one operative position and one substitution or maintenance position, or waiting position.
  • the seat 19 of the reel B is arranged in an optimal manner in order to allow the grip member 6 to pick up the single sheets C.
  • the seat 19 of the reel B is arranged so as to allow operators to easily and safely carry out their possible interventions.
  • the unwinding means 3 can comprise at least two seats 19 for two respective reels B.
  • this allows ensuring operating continuity of the device 1 in the case of depletion or jamming of one of the reels B: in other words, if one of the reels B is not available for any reason, the robotic arm 5 can pick up sheets C from the other reel B, so as to not interrupt the production cycle.
  • the two seats 19 for the respective reels B can for example be facing or superimposed.
  • the device 1 comprises two seats 19 arranged facing each other, and each of these is movable between the aforesaid operative and substitution/maintenance/waiting positions.
  • each of the two seats 19 of the reels B can be slidable between said operative and substitution/maintenance/waiting positions: in the operative position, one of the seats 19 or the other is situated in the vicinity of the robotic arm 5, while in the substitution/maintenance/waiting position one of the seats 19 or the other is situated within a protection 23 shaped for example like a cage, in which the operator can work in maximum safety conditions.
  • the two seats 19 for the respective reels B have the respective support frames 17 slidable along a same base structure 24.
  • the base structure 24 comprises respective parallel guides 25, along which the two support frames 17 are slidable.
  • the base structure 24 is then installed in a manner such that one portion thereof is situated within the protection 23, hence in the substitution/maintenance position, and another portion outside the same, in the operative position.
  • each of the two frames 17 can be carried out in an automated manner, for example by means of respective linear actuators 26, or it can even be carried out manually.
  • a greater number of seats 19 can be provided for respective reels B of cover film.
  • the device 1 comprises four seats 19 for respective reels B: with this solution, in addition to ensuring the necessary operating continuity in case of damage/failure or jamming, a greater versatility of use is also allowed in order to quickly and easily vary the size and/or type of film used for the covering.
  • the seats 19 are arranged so as to be slidable in a direction orthogonal to the advancement direction A of the palletized loads P.
  • the seats 19 could be arranged differently with reference to the aforesaid advancement direction A.
  • the seats 19 are arranged with the axes of the respective reels B parallel to the aforesaid advancement direction A, and also in this case they can be side-by-side or superimposed in order to limit the bulk.
  • the operation of the device 1 is entirely intuitive in light of that described above.
  • the robotic arm 5 Upon reaching a palletized load P on the support 2, the robotic arm 5 approaches the unwinding means 3.
  • the aforesaid edge D is interposed between the first element 15 and the second element 16: the latter are brought into a locking position of the film of the reel B, so as to firmly retain the edge D while awaiting the arrival of the grip member 6.
  • the grip member 6 then approaches the unwinding means 3, with the respective grippers 8,9,10 in open position.
  • the grippers 8,9,10 are then brought to the first, second openings 15a,16a, so as to interpose the edge D between the respective first, second members 11,12.
  • the first, second members 11,12 are then mutually brought close together, being carried into a gripping position of the edge D of the film of the reel B.
  • the grip member 6 After having grasped the edge D, the grip member 6 is moved away so as to unwind, via traction, a portion of film of the reel B of suitable length.
  • cover sheet C is in such a manner separated from the reel B.
  • cover sheet C is then - as shown in the same figures 1,2 - placed on the top of the palletized load P.
  • the grip member 6 releases the sheet C, and the cycle for applying a new sheet C is repeated exactly as described.
  • the film of the reel B is depleted - and if the unwinding means 3 comprise multiple seats 19 for respective reels B - the seat 19 bearing the depleted reel B is carried into substitution/maintenance/waiting position, while the other seat 19, bearing a full reel B, is brought into the operative position and is accessible to the robotic arm 5.
  • the invention as conceived allows attains important technical advantages.
  • the robotic arm 5 can be freely placed in the most suitable position with respect to the support 2 for the palletized load P; this ensures greater freedom for the designer of the packaging plant, since there are no constraints that require the device 1 to be in a predetermined position, as occurs for the machines of known type.
  • One of the main attained advantages is the possibility to reduce the planar bulk of the packaging plant, or to adapt it to the available spaces.
  • Another advantage consists of the fact that the robotic arm 5 can be situated in the most suitable position in relation to the specific requirements of a specific wrapping work, for example if it is necessary to carry out an anti-water or anti-dust wrapping, or for reducing to a minimum the travel that the load P carries out between the application of the sheet C and the subsequent lateral wrapping, or for still other needs, such as reducing the operating times of the wrapping machine.
  • reel B of cover film is now situated in a position that is much more convenient and accessible for the operators with respect to what occurs in the apparatuses of known type, e.g. in order to perform maintenance and/or substitution operations.
  • a wrapping machine M for palletized loads P comprising at least one device 1 for applying cover sheets having the above-described characteristics.
  • the machine M comprises a line 27 for advancing the palletized loads P; in particular, the palletized loads P advance between an inlet 28 and outlet 29 that are opposite each other.
  • the advancement line 27 can for example be of the type with rollers, or of any other equivalent type.
  • the machine M comprises at least one apparatus 30 for wrapping the palletized loads P.
  • the winding apparatus 30 has the function of winding a wrapping film around the lateral surface of the palletized load P, so as to lock the cover sheet C applied by the device 1 in position.
  • the winding apparatus 30 comprises at least one winding head 31; in turn, the winding head 31 supports a reel for wrapping film around the palletized loads P.
  • the winding apparatus 30 can for example comprise a robotic winding arm which carries the head 31 at its operative end, as shown in the embodiments of figures 1-10 and 12 , 13 .
  • the winding apparatus 30 can also be of another type, for example of the type comprising a kind of column base, which is vertically extended and along which the winding head 31 slides, in order to wind the film around the palletized load P from top to bottom or from bottom to top, in relation to the requested winding mode.
  • the machine M also comprises at least one rotary table 32.
  • the rotary table 32 is rotatable around an axis that is vertical during use.
  • the rotary table 32 is, more in detail, provided along said advancement line 27 between the inlet 28 and the outlet 29.
  • the rotary table 32 comprises rollers which, in a specific position of the table 32 itself, have the respective axes parallel to those of the advancement line 27, so as to obtain the necessary continuity that allows the translation of the palletized loads P.
  • the machine M also comprises a counter-table 33, with relative support means 34, opposite the rotary table 32 and adapted to be positioned on the top of the palletized load P so as to maintain it in the correct equilibrium position during the rotation imparted by the table 32, and thus also to maintain in the suitable position the cover sheet C applied on the load P by the device 1.
  • the support 2 for the palletized load P is provided along the advancement line 27.
  • the support 2 is constituted by a specific zone of the advancement line 27, i.e. the most suitable zone where to deposit the cover sheet C on the top of the palletized load P, in order to then perform the lateral wrapping of the same in a quick and easy manner.
  • the zone of the advancement line 27 at which the application of the cover sheet C occurs can be that which immediately precedes the arrival of the load P on the rotary table 32.
  • the distance between such application zone and the rotary table 32 can be reduced to the minimum, since the robotic arm 5 can also follow the load P while this advances towards the table 32.
  • FIGS 8-13 schematically illustrate, in plan view, various possible embodiments of the wrapping machine M comprising the application device 1 according to the present invention.
  • the winding apparatus 30 comprises a robotic winding arm - the apparatus 30 and the robotic arm 5 are positioned on the same side with respect to the advancement line 27.
  • the unwinding means 3 are positioned on the same side where the robotic arm 5 is situated.
  • the robotic arm 5 can be placed in various positions, it can be placed for example in the immediate vicinity to the unwinding means 3, and also close to the support 2 for the palletized load P (i.e. close to a specific zone of the advancement line 27).
  • the action radius of the robotic arm 5 is circumscribed at a well-defined zone of the machine M: this allows considerably limiting the planar bulk of the machine M itself, without however limiting the functional capacities thereof.
  • the machine M comprises a winding apparatus 30 comprising a kind of column base, which is vertically extended, along which the winding head 31 slides.
  • This winding apparatus 30 solution has a lower planar bulk than the solution with robotic arm, but it also has lower versatility of use.
  • the robotic arm 5 of the device 1 is positioned on the opposite side with respect to the advancement line 27.
  • the means 3 for unwinding the reel B of the cover film are positioned at the same side where the winding apparatus 30 is situated.
  • the action radius of the robotic arm 5 is completely superimposed on the advancement line 27: in this manner it is possible to obtain a solution with very limited planar bulk especially according to the direction orthogonal to the advancement direction A of the palletized loads P.
  • the machine M comprises a winding apparatus 30 of the type comprising a robotic arm carrying the respective winding head 31.
  • the means 3 for unwinding the reel B of cover film and the robotic arm 5 of the device 1 are positioned on the same side with respect to the advancement line 27, and both on the opposite side with respect to the winding apparatus 30.
  • this arrangement allows reducing the planar bulk of the machine M at least at a section of the advancement line 27.
  • the operation of the wrapping machine M, comprising the application device 1, is therefore the following.
  • Each palletized load P follows the advancement line 27 and reaches the rotary table 32.
  • the robotic arm 5 picks up a relative cover sheet C from the unwinding means 3, and places it on the top of the palletized load P.
  • the times and modes of positioning the cover sheet C on the palletized load can vary in relation to the lateral winding mode of the load P itself.
  • the lateral wrapping film is wound by the head 31 starting from the top of the load P, then descending towards the base, while the anti-water winding on the contrary provides that the film be wound by the same head 31 starting from the base of the load P, then ascending towards the top.
  • the movements that the robotic arm 5 executes for placing the sheet C on the load P can be different in relation to the winding to be carried out.
  • the cover sheet C can be positioned on the top of the palletized load P while the latter is still moving, i.e. it is still situated in the step of advancing towards the rotary table 32.
  • this winding mode provides that the lateral film be applied starting from the top of the load P, hence the sheet C is immediately immobilized by the lateral film itself as soon as the top-to-bottom winding has started.
  • the robotic arm 5, bearing the sheet C accompanies the advancement of the load P on the line 27, and provides to apply the sheet C itself on the top thereof: normally the load P is moved on the advancement line 27 with relatively low speeds, hence compatible with such operation.
  • the robotic arm 5 can be driven so as to be moved in opposite direction with respect to that of advancement of the load P, so as to place the sheet C on the top of the load P itself starting from the front side and proceeding towards the rear side, with reference to the aforesaid advancement direction.
  • the counter-table 33 is lifted and the robotic arm 5 provides to position the sheet C on the top of the palletized load P, temporarily immobile.
  • the winding mode of anti-water type requires longer operating times than those required by the anti-dust mode: for this reason, the use of the robotic arm 5 is particularly advantageous since it allows applying the sheet C on the top of the load P in a particularly quick and precise manner, i.e. at the moment when the lateral winding is stopped and before the final sheet C fixing revolutions have been carried out.
  • Also forming the object of the present invention is a method for wrapping a palletized load P according to the previously described operating steps.
  • the method comprises the steps of providing at least one support 2 for at least one palletized load P, providing means 3 for unwinding at least one reel of cover film B, from which a plurality of sheets C can be obtained that are to be applied on the palletized load P, and providing at least one winding apparatus 30, suitable to wind a wrapping film around the lateral surface of the palletized load P.
  • the method also comprises the steps of providing at least one applicator member 4 suitable to position a sheet C obtained from said reel B on the top of the palletized loads P, in which the applicator member 4 comprises at least one robotic arm 5 having at least one operative end 5a with which at least one grip member 6 is associated.
  • the method provides for a step of grasping the edge D of the reel B by means of said grip member 6, so as to pick up a sheet C, and of positioning the sheet C on the top of the palletized load P by means of the robotic arm 5.
  • the method then provides for a step of winding the film around the palletized load P, so as to block the sheet C in the correct cover position.
  • the device 1 and the machine M according to the present invention allow obtaining greater flexibility and versatility both regarding design and use, since the robotic arm 5 can be situated in the most suitable position in relation to the layout needs and planar bulk, as well as in relation to the function needs of application of the cover sheet C on the top of the palletized load P.
  • the robotic arm 5 is particularly advantageous since it allows effectively carrying out the wrapping of the palletized loads P according to all the possible winding modes, for example according to the most widespread anti-water and anti-dust modes.
  • the mobility of the robotic arm 5 allows positioning the sheet C on the top of the palletized load P at the most opportune time in relation to the specific winding mode to be executed, reducing the operating times of the wrapping machine M.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (18)

  1. Machine (M) pour envelopper des charges palettisées (P), comprenant au moins un dispositif (1) pour appliquer des feuilles de couverture (C) sur lesdites charges palettisées (P), ladite machine (M) comprenant une ligne d'avancement (27) pour faire avancer lesdites charges palettisées (P) le long d'une direction d'avancement (A) spécifique entre une entrée (28) et une sortie (29) qui sont opposées l'une à l'autre, et au moins un appareil d'enroulement (30) adapté pour enrouler un film d'emballage autour de la surface latérale de ladite charge palettisée (P), ledit dispositif (1) comprenant au moins un support (2) pour au moins une charge palettisée (P), chacune des charges palettisées (P) arrivant sur le support (2), étant déplacée le long de ladite direction d'avancement (A) spécifique, des moyens (3) pour dérouler au moins une bobine de film de couverture (B) à partir duquel une pluralité de feuilles (C) devant être appliquées sur les charges palettisées (P) peut être obtenue, et au moins un élément applicateur (4) adapté pour positionner une par une les feuilles de couverture (C) obtenues de ladite bobine (B) au sommet des charges palettisées (P) respectives, ledit élément applicateur (4) comprenant au moins un bras robotisé (5) ayant au moins une extrémité opérationnelle (5a) avec laquelle au moins un élément de préhension (6) est associé, ledit élément de préhension étant adapté pour prélever chaque feuille de couverture (C) déroulée de ladite bobine (B) sur au moins un bord (D), et pour la positionner au sommet d'une charge palettisée (P) respective, ledit bras robotisé (5) comprenant une base (5b), opposée à l'extrémité opérationnelle (5a), positionnée le long du support (2) de la charge palettisée (P), caractérisé en ce que ledit bras robotisé (5) supportant ladite feuille (C), accompagne l'avancement desdites charges (P) sur ladite ligne (27) et applique la feuille (C) au sommet de ladite charge palettisée (P) alors que cette dernière est toujours en mouvement, ou applique ladite feuille (C) au sommet de ladite charge palettisée (P) avec l'enroulement latéral déjà commencé et arrêté à un certain point, au moyen dudit appareil d'enroulement (30), afin de permettre l'application de ladite feuille (C).
  2. Machine selon la revendication 1, dans laquelle lesdits moyens de déroulage (3) comprennent au moins un siège (19) pour au moins une bobine (B) respective de film de couverture, comprenant au moins deux rouleaux de dérouleur (20, 21) avec des axes parallèles, lesdits rouleaux de dérouleur (20, 21) étant inactifs, ou au moins l'un d'eux étant associé à des moyens de friction respectifs ou avec des moyens d'actionnement en rotation respectifs.
  3. Machine selon la revendication 2, dans laquelle ledit siège (19) est réalisé de manière à contenir ladite bobine (B) avec un axe vertical pendant l'utilisation.
  4. Machine selon la revendication 2 ou 3, dans laquelle ledit siège (19) est mobile entre au moins une position opérationnelle et une position de remplacement/entretien/attente, à laquelle des protections (23) sont prévues pour les opérateurs.
  5. Machine selon l'une des revendications 2 à 4, dans laquelle lesdits moyens de déroulage (3) comprennent au moins deux sièges (19) côte-à-côte ou superposés pour des bobines (B) respectives, afin de pouvoir assurer la continuité opérationnelle du dispositif (1) en cas d'usure ou de blocage de l'un de ces sièges (19).
  6. Machine selon l'une des revendications précédentes, dans laquelle ledit élément de préhension (6) comprend un élément de support (7) pour au moins une première pince (8) et une deuxième pince (9), adaptée pour saisir sélectivement le bord (D) de chaque feuille (C) à au moins deux points séparés respectifs.
  7. Machine selon la revendication 6, dans laquelle ledit élément de support (7) est de forme allongée et comprend au moins une partie (7a) de raccordement à ladite extrémité opérationnelle (5a), ladite première pince (8) et ladite deuxième pince (9) étant positionnées aux extrémités opposées dudit élément de support (7).
  8. Machine selon la revendication 7, dans laquelle ledit élément de préhension (6) comprend au moins une troisième pince (10), associée audit élément de support (7), et interposée entre ladite première pince (8) et ladite deuxième pince (9).
  9. Machine selon l'une des revendications précédentes, dans laquelle lesdits moyens de déroulage (3) comprennent des moyens (14) pour le blocage sélectif du bord (D) de chaque feuille de couverture (C) déroulée de ladite bobine (B), adaptés pour maintenir ledit bord (D) dans la position correcte afin de permettre audit élément de préhension (6) de la saisir.
  10. Machine selon la revendication 9, dans laquelle lesdits moyens de blocage (14) sélectifs comprennent au moins un premier élément (15) et un deuxième élément (6) mobiles mutuellement entre une position de passage libre du bord (D) de la bobine (B), dans laquelle ils sont séparés l'un de l'autre, et une position de blocage du bord (D) de la bobine B, dans laquelle ils sont en contact mutuel pour fermer le bord (D) entre eux.
  11. Machine selon la revendication 10, dans laquelle ledit premier élément (15) et ledit deuxième élément (16) sont couverts de premières ouvertures (15a) et deuxièmes ouvertures (16a) respectives correspondantes afin de permettre audit élément de préhension de saisir le bord (D) de la bobine (B).
  12. Machine selon l'une des revendications 10 et 11, dans laquelle ledit premier élément (15) et ledit deuxième élément (16) ont une forme sensiblement plate, ledit premier élément (15) étant fixe et ledit deuxième élément (16) étant mobile par rapport audit premier élément (15).
  13. Machine selon la revendication 12, dans laquelle ledit deuxième élément (16) est rotatif autour d'un axe de rotation (R) parallèle à l'axe de symétrie de ladite bobine (B), et est associé à au moins un actionneur (18) adapté pour mettre en rotation ledit deuxième élément (16) entre ladite position de passage libre du bord (D) de la bobine (B) et ladite position de blocage du bord (D).
  14. Machine selon la revendication 13, dans laquelle lesdits moyens de déroulage (3) comprennent au moins un rouleau tendeur (22) ayant un axe qui coïncide avec ledit axe de rotation (R), autour duquel le film de couverture déroulé de ladite bobine (B) est enroulé et maintenu en position par lesdits moyens de blocage (14) sélectifs.
  15. Machine (M) selon l'une des revendications précédentes, comprenant une ligne (27) pour faire avancer des charges palettisées (P) entre une entrée (28) et une sortie (29), ladite ligne d'avancement (27) comprenant ledit support (2) pour ladite charge palettisée (P), au moins un appareil d'enroulement (30) supportant au moins une tête d'enroulement (31) qui supporte à son tour au moins une bobine pour envelopper le film autour des charges palettisées (P).
  16. Machine selon la revendication précédente, dans laquelle ledit appareil d'enroulement (30) et ledit bras robotisé (5) sont positionnés sur le même côté par rapport à ladite ligne d'avancement (27), ou sur des côtés opposés.
  17. Machine selon la revendication 15 ou 16, dans laquelle ledit bras robotisé (5) et lesdits moyens de déroulage (3) sont positionnés sur le même côté par rapport à ladite ligne d'avancement (27), ou sur des côtés opposés.
  18. Procédé pour envelopper une charge palettisée (P), comprenant les étapes de :
    fourniture d'une ligne d'avancement (27) pour faire avancer au moins une charge palettisée (P) le long d'une direction d'avancement (A) spécifique entre une entrée (28) et une sortie (29) qui sont opposées l'une à l'autre,
    fourniture d'au moins un support (2) pour au moins une charge palettisée (P),
    déplacement de chacune des charges palettisées (P) arrivant sur le support (2) le long de ladite direction d'avancement (A) spécifique,
    fourniture de moyens (3) pour dérouler au moins une bobine de film de couverture (B), à partir de laquelle plusieurs feuilles (C) qui doivent être appliquées sur la charge palettisée (P) peuvent être obtenues,
    fourniture d'au moins un appareil d'enroulement (30) adapté pour enrouler un film d'emballage autour de la surface latérale de la charge palettisée (P),
    fourniture d'au moins un élément applicateur (4) adapté pour positionner une feuille (C) obtenue de ladite bobine (B) au sommet de la charge palettisée (P), ledit élément applicateur (4) comprenant au moins un bras robotisé (5) ayant au moins une extrémité opérationnelle (5a), avec lequel au moins un élément de préhension (6) est associé, et une base (5b), opposée à l'extrémité opérationnelle (5a), positionnée le long du support (2) de la charge palettisée (P),
    préhension du bord (D) de la bobine (B) au moyen dudit élément de préhension (6), de façon à prélever une feuille (C),
    caractérisé en ce qu'il comprend les étapes de :
    application de la feuille (C) au sommet de ladite charge palettisée (P) pendant que cette dernière est toujours en mouvement au moyen dudit bras robotisé (5), en supportant ladite feuille (C), accompagnant l'avancement desdites charges (P) sur ladite ligne (27), ou
    application de la feuille (C) au moyen dudit bras robotisé (5) au sommet de ladite charge palettisée (P) avec l'enroulement latéral déjà commencé et arrêté à un certain point, au moyen dudit appareil d'enroulement (30), afin de permettre l'application de ladite feuille (C).
EP17832354.9A 2016-12-22 2017-12-21 Dispositif d'application de feuilles de recouvrement sur des charges palettisées Active EP3558823B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000130407A IT201600130407A1 (it) 2016-12-22 2016-12-22 Dispositivo di applicazione di fogli di copertura su carichi pallettizzati
PCT/IB2017/058295 WO2018116246A1 (fr) 2016-12-22 2017-12-21 Dispositif d'application de feuilles de couverture sur des charges palettisées

Publications (2)

Publication Number Publication Date
EP3558823A1 EP3558823A1 (fr) 2019-10-30
EP3558823B1 true EP3558823B1 (fr) 2021-09-29

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Application Number Title Priority Date Filing Date
EP17832354.9A Active EP3558823B1 (fr) 2016-12-22 2017-12-21 Dispositif d'application de feuilles de recouvrement sur des charges palettisées

Country Status (4)

Country Link
US (1) US20190352029A1 (fr)
EP (1) EP3558823B1 (fr)
IT (1) IT201600130407A1 (fr)
WO (1) WO2018116246A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2715516A1 (es) * 2019-02-28 2019-06-04 Controlpack Systems S L Dispositivo para la colocacion de cubiertas protectoras sobre productos paletizados
IT202100017840A1 (it) * 2021-09-03 2023-03-03 Erco Service S R L Apparato metti foglio e relativo dispositivo e metodo di alimentazione

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI80418C (fi) * 1988-04-06 1990-06-11 Haloila M Oy Ab Anordning och foerfarande foer utbredning av en omslagsfilm vid inveckling.
AU3147700A (en) * 1999-03-11 2000-09-28 Seelen A/S A top film applicator and a method of applying top film onto a cargo
FI991020A0 (fi) * 1999-05-04 1999-05-04 United Packaging Plc Käärintäpakkausmenetelmä ja käärintäpakkauskone
ITBO20050269A1 (it) * 2005-04-21 2006-10-22 Atlanta Stretch S P A Apparato a bracci oscillanti per la collocazione automatica di un foglio di copertura sulla sommita' di carichi pallettizzati durante la fase d'avvolgimento con film estensibile
ITBO20060099A1 (it) * 2006-02-13 2007-08-14 Aetna Group Spa Unita' di posizionamento di un foglio di film per la copertura della sommita' di gruppi di prodotti.
ITMO20060416A1 (it) * 2006-12-21 2008-06-22 Bema Srl Procedimento per la fasciatura di carichi pallettizzati
ITMO20070106A1 (it) * 2007-03-27 2008-09-28 Aetna Group Spa Apparato per posizionare un foglio di copertura sulla sommita' di un prodotto
SE531818C2 (sv) * 2008-05-15 2009-08-18 Tomas Karlsson Förfarande att applicera ett hörnskydd och ark för användning vid förfarandet

Also Published As

Publication number Publication date
WO2018116246A1 (fr) 2018-06-28
EP3558823A1 (fr) 2019-10-30
IT201600130407A1 (it) 2018-06-22
US20190352029A1 (en) 2019-11-21

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