EP3572220B1 - Machine de pliage de découpe à butées inférieures motorisées - Google Patents

Machine de pliage de découpe à butées inférieures motorisées Download PDF

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Publication number
EP3572220B1
EP3572220B1 EP19176144.4A EP19176144A EP3572220B1 EP 3572220 B1 EP3572220 B1 EP 3572220B1 EP 19176144 A EP19176144 A EP 19176144A EP 3572220 B1 EP3572220 B1 EP 3572220B1
Authority
EP
European Patent Office
Prior art keywords
piston
lower stops
stops
blocking
folding machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19176144.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3572220A1 (fr
Inventor
Yannick Layer
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.)
Mibox SAS
Original Assignee
Mibox SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mibox SAS filed Critical Mibox SAS
Priority to PL19176144T priority Critical patent/PL3572220T3/pl
Publication of EP3572220A1 publication Critical patent/EP3572220A1/fr
Application granted granted Critical
Publication of EP3572220B1 publication Critical patent/EP3572220B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
    • B31B50/46—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B31B2100/0024—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed having all side walls attached to the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2110/00—Shape of rigid or semi-rigid containers
    • B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
    • B31B2110/35—Shape of rigid or semi-rigid containers having a polygonal cross section rectangular, e.g. square

Definitions

  • the field of the invention is that of devices and methods for producing containers by folding blanks of paper, cardboard, corrugated cardboard, plastic or similar material in a folding machine and possibly a gluing machine.
  • containers comprising at least one bottom, four sides, and possibly corner reinforcements between their consecutive sides.
  • Such containers are conventionally made from a blank having adequate fold lines and slots forming side flaps, bottom and, where appropriate, reinforcement.
  • folding machines comprising a shaping cavity inside which a piston is driven in translation between several levels.
  • a conveyor makes it possible to bring the cuts one by one to the upper level of the cavity. Then, the piston is moved in translation up to the second level delimited by lower stops.
  • the piston moves the cutout and causes it to slide inside the cavity against side guides which allow the side flaps of the cutout to be folded down so as to form the sides of the container up to that the bottom of the cutout comes to rest against the lower stops.
  • the folding machine may also include means for gluing the areas of the blank to be glued in order to keep the container in shape.
  • the container thus formed is then evacuated from the cavity by returning the piston to the first level then by moving the lower stops outside the cavity so that the container is evacuated from the cavity under the effect of gravity and / or by means of an ejector provided for this purpose.
  • the position of the lower stops in the cavity defines the second level, the adjustment of which makes it possible to define the depth of the shaped container.
  • a change in the height of the container therefore supposes that an operator comes to loosen each stopper, moves it along its groove to place it in the desired position, then tightens the stopper to lock it in position.
  • Such an adjustment system has the advantage of being simple from a mechanical point of view.
  • the object of the invention is in particular to provide an effective solution to at least some of these various problems.
  • an objective of the invention is to provide a container folding machine in which the adjustment of the lower stops is optimized.
  • the object of the invention is to provide such a machine which makes it easier for the operator who is responsible for it to adjust the position of the lower stops.
  • Another objective of the invention is, according to at least one embodiment, to provide such a machine which makes it possible to make the adjustment of the lower stops more reliable, in particular to guarantee that all of the lower stops are adjusted to the same level.
  • Another objective of the invention is, according to at least one embodiment, to provide such a technique which is efficient and / or robust and / or inexpensive.
  • said means for driving said piston are configured to move said lower stops along said shaping cavity to define said second level.
  • the adjustment of the position of the lower stops is no longer carried out manually by an operator but is on the contrary mechanized, in other words motorized.
  • the lower stops are in fact moved by means of the piston driving means to define the second level.
  • the invention thus makes it possible to simplify the work of operators while making the adjustment of the lower stops more reliable while ensuring that they are all located at the same level after adjustment.
  • a folding machine comprises means for translational connection of said lower stops with said piston along the axis of movement of said piston.
  • said lower stops are movable relative to said piston between at least one release position in which said translational connection means are in a released state in which said lower stops are not linked in translation with said piston, and an adjustment position in which said translational connection means are in a driving state in which said lower stops are translated in translation with said piston.
  • said piston comprises adjustment housings capable of receiving said lower stops, said lower stops being movable relative to said piston between at least one release position in which they do not cooperate with said adjustment housing and a position of adjustment in which they cooperate with said adjustment housing so that movement of said piston in said cavity by said drive means is accompanied by movement of said lower stops to define said second level.
  • a folding machine comprises means for driving said stops in motion from one of their release and adjustment positions to the other.
  • said means for driving said stops in motion from one to the other of their release and adjustment positions and said means for driving said lower stops between said holding position and said ejection position are coincident.
  • a folding machine comprises comprising means for blocking said lower stops in position along said axis of movement, said blocking means being able to assume a blocked state and an unlocked state, said unlocked state being taken when said connecting means is in said driving state.
  • a folding machine comprises means for maintaining said stops in position along said displacement axis when said locking means are in said unlocked state and when said means for translational connection of said lower stops with said piston are in said released state.
  • said locking means of each of said lower stops comprise a rack along which the corresponding lower stop is mounted movable in translation to define said second level, each stop comprising at least one locking tooth capable of cooperating with said said stop. corresponding rack in said blocked state.
  • the rack-and-pinion locking is relatively simple to implement and is particularly effective and safe.
  • said locking means of each of said lower stops comprise a dovetail type system comprising a male element and a female element, one of which is integral with the corresponding lower stop, said male element and said female element. being able to slide one inside the other in said unlocked state and to become wedged into one another in said locked state.
  • This solution is also relatively simple to implement and is particularly effective and safe.
  • said locking means of each of said lower stops comprise an eccentric system comprising a male element and a female element, one of which is integral with the corresponding lower stop, said male element and said female element being able to slide. one inside the other in said unlocked state and wedged into each other in said locked state.
  • This solution is also relatively simple to implement and is particularly effective and safe.
  • said locking means of each of said lower stops comprise a friction element, integral with the corresponding lower stop, and a friction surface, said friction element being able to slide relative to said friction surface in said friction surface. unlocked state and being held in abutment against said friction surface in said locked state.
  • each lower stopper is movably mounted according to a blocking-unlocking movement of said blocking means, said piston acting on the lower stops to move them and thus place said blocking means in their released state when said means of driving said stops move the latter towards said piston.
  • said lower stops are mounted to move according to said locking-unlocking movement against the effect of return means.
  • the locking-unlocking movement of said lower stops is of the linear and / or rotary type.
  • the movement of said lower stops between their adjustment and release position is of the linear and / or rotary type.
  • such a folding machine 1 comprises a frame 10 defining a shaping cavity 11 inside which a piston 12 can be driven in translation between a first and a second level via drive means.
  • the first level N1 is a higher level and the second level N2 is a lower level. These levels could be reversed. It could alternatively be laterally shifted levels rather than vertically or otherwise.
  • the piston 12 is connected to a rod 120 sliding in a groove 121 defining the axis of translation of the piston.
  • the movement from one level to another is obtained by means of an actuator such as for example a jack connected to the rod 120 or a motor driving a pinion meshing with a rack integral with the rod 120 or any other suitable drive means.
  • the piston 12 here has an essentially parallelepipedal peripheral contour. Its shape could be different. It corresponds to that of the container that one wishes to form.
  • the folding machine comprises means for routing one by one cutouts 24 at the first level N1 of the cavity 11.
  • Such conveying means comprise, for example, a conveyor 13, for example of the type conveyor belt, roller or the like.
  • the conveyor and the piston could include a manipulator robot able to bring them one by one to the first level and to move the cuts along the cavity in order to shape them.
  • the cavity 11 houses, between the first N1 and the second N2 levels, shaping guides 14.
  • These guides are known per se to those skilled in the art. They include plates along which the plunger causes the cutout to slide to fold the side flaps and thereby form the sides of the container as it moves between the first and second levels of the cavity.
  • the cavity 11 accommodates lower stops 15 whose position defines the second level N2.
  • These lower stops 15 are in this embodiment four in number, one being positioned essentially at each angle of the bottom of the container to be formed. Their position and number could be different (higher or lower).
  • the folding machine comprises means for mechanized adjustment of the position of the lower stops in the cavity in order to define the second level.
  • each lower stop 15 is mounted to move in translation along a linear guide beam 16 along an axis essentially parallel to the axis of translation of piston 12 in cavity 11.
  • each lower stop 15 is integral with a carriage 17 mounted movable in translation along the linear guide beam 16. It is mounted movably in rotation on this carriage by means of a pivot link 150 of essentially orthogonal axis. to the axis of translation of the carriage, against the effect of return, for example elastic return comprising here tension springs 18. It could alternatively be an elastomer spring or any other type of suitable spring. It could also be a jack or any other type of suitable actuator.
  • Each lower stop 15 carries a locking tooth 19 able to mesh with a rack 20 integral with the linear guide beam 16 which extends along the axis of this beam.
  • This tooth-rack system constitutes means for locking the lower stops in position along their adjustment axis, i.e. axis of movement along the linear guide beam.
  • This system can take an unlocking state in which the teeth do not cooperate with the racks so that the lower stops are movable in translation along the linear guide beams, and a locking state in which the teeth cooperate with the racks if although the lower stops are locked in position and can no longer move along the linear guide rods.
  • each linear guide beam 16 is connected at each of its ends to a high 21 and low 22 rod by means of a pivot connection 210, 220 of axes parallel to each other and essentially orthogonal to the axis of translation of the piston.
  • the other end of the lower link 22 is connected to the frame 10 by means of a pivot link 221 with an axis essentially parallel to the axis of the pivot link 220.
  • the other end of the high link 21 is connected by means of a pivot link 211 of axis substantially parallel to the axis of the pivot link 210 to the rod of a jack 23.
  • the body of the jack 23 is connected to the chassis by means of a pivot link 230 of axis substantially parallel to the axis of the pivot link 211.
  • the high link 21 is connected between its two ends to the frame 10 by means of a pivot link 212 with an axis essentially parallel to the axis of the pivot link 210.
  • the upper 21 and lower 22 rods form with the linear guide rod 16 a deformable parallelogram which can be deformed by means of the jack 23.
  • the piston comprises for each lower stop a drive housing 122 capable of accommodating a lower stop 15.
  • the lower stops 15 are movable relative to the piston 12 between at least one release position in which they do not cooperate with the adjustment housings and an adjustment position in which they cooperate with the adjustment housings so that a movement of the piston in the cavity by the means for driving the piston is accompanied by a displacement of the lower stops to define the second level.
  • the means for adjusting the lower stops thus comprise means for connecting the lower stops in translation with the piston along the axis of movement of the piston in the cavity.
  • the translational connection means can take a state of release in which the lower stops are not linked in translation with the piston (the lower stops do not cooperate with the drive housings) and a drive state in which the stops lower are linked in translation with the piston (the lower stops cooperate with the drive housings).
  • the folding machine comprises means for driving the lower stops in movement from one to the other of their release and adjustment positions.
  • These drive means comprise the jacks 23 as well as the deformable parallelograms.
  • the machine comprises a control unit conventionally making it possible to control all the movements of the various mobile equipment items.
  • a control unit conventionally comprises, for example, a central unit and a man-machine interface.
  • the jacks 23 are actuated in order to bring the lower stops 15 closer to the side walls of the piston 12.
  • the lower stops 15 progressively come into contact with the piston which causes them to pivot with respect to the linear guide beams 16 about the axis of the pivot links 150 in a locking-unlocking movement, and the disengagement of the locking teeth of the racks placing thus the locking means in their unlocked state (cf. figure 4 ).
  • the machine may include means for holding the lower stops in position along the axis of movement. of the piston when the locking means are in their unlocked state and the means for translational connection of the lower stops with the piston are in their released state.
  • These holding means here comprise, for each lower stop, a plate 171 provided to bear against a side surface 160 against the effect of a compression spring in the force can be calibrated by means of an adjusting screw 173 (cf. figure 4 The piston is then moved in translation inside the cavity until its adjustment housings 122 are aligned with the lower stops 15.
  • a roller 151 is mounted so as to be able to rotate at the end of each lower stop. These rollers make it easier to move the piston against the lower stops. These rollers could be replaced by friction zones with a low coefficient of friction.
  • the depth of the adjustment housings 122 is chosen such that when the lower stops 15 are housed therein, the means for blocking the lower stops in position are in their unlocked state, the blocking teeth 19 not cooperating with the racks 20.
  • the locking means of the lower stops 15 are therefore in their unlocked state when the means for translational connection of the stops 15 with the piston 12 are in their training state.
  • the piston and the lower stops are then linked in translation along the axis of movement of the piston in the shaping cavity.
  • the piston is then translated, via its drive means, inside the shaping cavity towards or from the first level depending on whether it is desired to raise or lower the lower stops.
  • the force imparted by the piston drive means is of course greater than the frictional force of the holding means, in this case of the plates 171 against the surfaces 161 of the linear guide beam 16.
  • the jacks 23 are actuated to move the lower stops away from the side walls of the piston and thus dislodge them from the adjustment housings 122.
  • the lower stops 15 pivot around the axis of the pivot links 150 in a locking-unlocking movement under the effect of the return means 18 so that the locking means return to their locked state in which the locking teeth 19 cooperate with the racks 20 to hold the lower stops 15 in position along the linear guide beams 16.
  • the lower stops 15 are then at the desired height but laterally offset outside the shaping cavity in their ejection position (cf. figure 7 ).
  • the piston 12 is raised via its drive means above the first level to release it from the shaping cavity.
  • the jacks 23 are actuated so as to laterally shift the lower stops inside the shaping cavity without modifying their height to bring them into their holding position in which they can perform their function as lower stops.
  • the conveyor is used to bring a cut to the first level.
  • the means for driving the piston are implemented to move the piston in the direction of the second level.
  • the piston 12 drives inside the shaping cavity 11 the cutout 24 which comes into contact with the shaping guides 14.
  • the side flaps of the cutout are then gradually folded back to form the sides of the container until the bottom flap comes to rest against the bottom stops. The container is then formed.
  • the piston 12 is reassembled via its drive means to the first level then the cylinders 23 are actuated to move the lower stops laterally outside the shaping cavity until they are placed in their ejection position in which it does not. no longer retain the container in the cavity, the latter being able to be ejected therefrom under the effect of gravity and / or by means of an ejector.
  • the linear guide beams 16 are not connected to the frame by deformable parallelograms. They are connected thereto by slide connections 80 of axes essentially orthogonal to the axis of translation of the piston in the shaping cavity. They can be moved closer or further from the piston by means of jacks 23.
  • the lower stops 15 are mounted to move in translation with respect to the linear guide beams 16 by means of slide connections 81 of axes essentially orthogonal to the axis of translation of the piston in the shaping cavity. They are also mounted to move in translation along the guide beams 16 as in the previous embodiment by slide connections 82.
  • linear guide beams 16 carry racks 20 and the lower stops 15 carry locking teeth 19.
  • each linear guide beam 16 is mounted to be able to rotate along an axis 90 essentially parallel to the axis of movement 91 of the piston.
  • a single beam and a single lower stopper are shown in this figure.
  • a machine according to the invention can also comprise means conventionally allowing the gluing of the flaps of the blanks in the areas which must optionally be glued in order to keep the container in shape.
  • These means can, for example, comprise pumps and nozzles for injecting glue.
  • the machine according to the invention is a folder-gluer machine.
  • the stops could carry lugs provided to cooperate with the complementary shaped housings provided in the piston.
  • the position of the housings and lugs could be reversed.
  • the translational connection of the lower stops and of the piston can for example be obtained by the implementation of male element (s) integral with the lower stops, or of the piston, provided ( s) to cooperate with one or more female elements integral with the piston, or with lower stops. Any other suitable connection means could of course be implemented.
  • the locking elements could comprise an eccentric integral with each lower stopper coming to be blocked in a groove of the corresponding beam during the pivoting of the stop relative to the latter.
  • the locking elements could comprise a dovetail system comprising a male element and a female element, one of which is integral with the corresponding lower stop and the other of the frame, in particular of the guide beam, the 'male element and female element being able to slide one inside the other in the unlocked state and to get stuck in one another during the movement of the stops towards the piston in the blocked state.
  • the blocking elements could comprise a friction element, integral with the corresponding lower stop, and a friction surface on the frame in particular on the corresponding beam, the friction element being able to slide relative to the surface. friction in the unlocked state and being held in abutment against the friction surface during movement of the stops towards the piston in the locked state.

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EP19176144.4A 2018-05-24 2019-05-23 Machine de pliage de découpe à butées inférieures motorisées Active EP3572220B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19176144T PL3572220T3 (pl) 2018-05-24 2019-05-23 Maszyna do składania wykrojów z zmotoryzowanymi dolnymi ogranicznikami

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1854413A FR3081373B1 (fr) 2018-05-24 2018-05-24 Machine de pliage de decoupe a butees inferieures motorisees

Publications (2)

Publication Number Publication Date
EP3572220A1 EP3572220A1 (fr) 2019-11-27
EP3572220B1 true EP3572220B1 (fr) 2020-09-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19176144.4A Active EP3572220B1 (fr) 2018-05-24 2019-05-23 Machine de pliage de découpe à butées inférieures motorisées

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EP (1) EP3572220B1 (pl)
ES (1) ES2841024T3 (pl)
FR (1) FR3081373B1 (pl)
PL (1) PL3572220T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111216407B (zh) * 2020-03-09 2024-08-06 成都精机自动化技术有限公司 一种纸盒自动包边成型设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357700A (en) * 1963-06-21 1967-12-12 Fmc Corp Blank feeder with adjustable stack holder
ES2066669B1 (es) * 1992-07-16 1995-10-16 Boix Maquinaria Sa Mejoras introducidas en moldes para la formacion de cajas de carton.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3081373B1 (fr) 2020-07-03
PL3572220T3 (pl) 2021-04-19
FR3081373A1 (fr) 2019-11-29
EP3572220A1 (fr) 2019-11-27
ES2841024T3 (es) 2021-07-07

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