FR2679823A1 - MACHINE FOR VOLUME PLATES COMPRISING A FLAT BOTTOM AS WELL AS A PERIPHERAL EDGE. - Google Patents

Abstract

The invention relates to a machine (1) for shaping trays (2) each comprising a particularly flat bottom as well as a peripheral border, these trays being produced by successive folding of flaps of a sidewall (9) of pre-cut material, which machine consists of at least: - a frame (1a), - a magazine (24) for storing a plurality of sidewalls (9) organized in at least one stack (25), - a station ( 30) for creating volume of at least one sidewall implementing in particular devices (31, 32) for raising the end and side flaps above a plane defined by the bottom of the plate, - a device (33) d 'extraction of a side of the magazine and then introduction of this side into the volume setting station, which device comprises at least one gripping member (34), - a device (35) for ejecting each tray placed in volume to an evacuation device (36), said ejection device also comprising at least one gripping member (37).

Description

The invention relates to a machine for setting the volume of trays

  each having a flat bottom and a peripheral edge. These trays are set in volume by successive folding of shutters defined in a flank of semi-rigid material, such as cardboard, by pre-cutting or folding lines and

  each comprise, on the one hand, a substantially rectangular bottom along the edges of which are articulated two so-called extreme flaps and two so-called lateral flaps and, on the other hand, means for locking the flaps in the set tray position.

  The above-mentioned locking means comprise on the one hand articulated along each of the extreme edges of each lateral flap, a lug intended to be placed in abutment against the internal face of one of the extreme flaps, ie the face which after assembly, will be turned towards the opposite end flap, and secondly, articulated along the transverse edge of each end flap, a flap intended to be folded towards the inner face of this end flap so as to pinch against the latter the legs of the adjacent ends of each

  side flap, which flap further comprises at least one member for its locking pinch position, such as a lug for cooperating with a cut for example arranged in the bottom of the tray.

  The machines currently used for the volume of such trays use an expensive sizing system and / or are not suitable for automation and are designed to process only one tray size. the invention aims to obtain is a machine which, while allowing with the same machine the realization of series of trays of different sizes, admits the automation of the volume setting cycle for each of the tray sizes and without gluing. To this end, the subject of the invention is a machine of the aforementioned type, characterized in that on the one hand: the magazine guides which are intended to act on opposite sides of a stack of flanks placed in the magazine are carried by means of adjustment in position which are likely to induce the displacement of these opposite guides substantially symmetrically with respect to each of the median planes of the pile in question which are generally approxi parallel to the faces with which said opposing guides must cooperate, the lifting devices of the volume setting station which are intended to act on the flaps adjoining the bottom to induce their lifting are also carried by means of adjustment in position, which are such as to induce the displacement of the lifting devices substantially symmetrically with respect to each of the median planes of the pile in question which are approximately parallel to the edges of the bottom to whose rights the flaps are articulated, and secondly, the gripping the sides of the extraction device and the ejection device are organized for, at the lifting station, produce their gripping action of a flank in the same area for all the different sizes of flanks to d 'be

  exploited in the machine. The invention will be better understood using the following description given by way of non-limiting example with regard to the

  attached drawing which shows schematically: Figure 1: a front view of a sidewall material for the realization of a tray of the type set in volume in the machine of the invention, Figures 2 and 3: perspective views A simplified side view of the machine according to the invention, a partial view in perspective of the structure of the machine, FIG. 6: a simplified perspective view. the flank storage store,

  Figure 7: a detail of construction of the position of volume of the machine.

  Referring to the drawing, it can be seen that the machine 1 sets in volume trays 2 each having a bottom 3 in particular flat

  as well as a peripheral edge 4, by successive folding of shutters 5 to 8 delimited in a sidewall 9 of semi-rigid material 5 by pre-cutting or folding lines.

  As it appears in the drawing, each plate 2 comprises, on the one hand, a quadrangular bottom 3, for example rectangular, along the edges 10 of which are articulated two so-called extreme flaps 6 and two lateral flaps 5 which, by their lifting , form the peripheral edge 4 and on the other hand, means 11 for locking flaps in trailing position set volume. Conventionally, the aforementioned locking means 11 comprise: articulated along each of the end edges 12 of each lateral flap 5, a tab 7 intended to be placed in abutment against the internal face 15 of one of the extreme flaps 6, that is to say the face which, after assembly, will be turned towards the opposite end flap, and secondly articulated along the transverse edge 16 of each end flap, a flap 8 intended to be folded towards the inner face 15 of this end flap 6 so as to clamp against the latter the tabs 7 of the adjacent ends of each side flap 5, which flap 8 further comprises at least one member 22 for its locking pinch position, such a pin for to cooperate with a cutout 23 for example arranged in the bottom of the tray. As it appears in the drawing, the machine 1 of volume of these trays 2 consists of at least one frame la (partially shown), a storage magazine 24 of a plurality of flanks 9 organized in at least one stack 25, which magazine comprises, on the one hand, guides 26 intended to co-operate in guiding the main faces 27 which generally form the succession of fields of the flanks of the sidewall stack 25 that the magazine receives and, on the other hand, delimited between the aforementioned guides, two opposite openings 28, 29, including an upper opening 28 called sidewall loading and a lower opening 29 called sidewall unloading, a position 30 volume at least one side including flanks devices 31, 32 for lifting the extreme and lateral flaps above a plane defined by the bottom of the tray, a device 33 for extracting a sidewall of the store and then introducing this sidewall into the volume setting station , which device comprises at least one gripping member 34, a device 35 for ejecting each tray set in volume towards an evacuation device 36, the said ejection device also comprising at least one gripping member 37. the invention on the one hand: the guides 26 of the magazine 24 which are intended to act on opposite faces 27 of a stack of flanks 9 placed in the magazine are carried by means 381 382 of adjustment in20 position which are of such as to induce the displacement of these opposed guides substantially symmetrically with respect to each of the median planes of the cell 25 which are generally approximately parallel to the faces with which said opposed guides are to cooperate, the devices 31, 32 for lifting the station 30 volume setting which are intended to act on the shutters 5 to 8 attached to the bottom to induce their lifting are also carried by 39 adjusting means in po sition, which are likely to induce the displacement of the lifting devices 31, 32 substantially symmetrically with respect to each of the median planes of the pile considered which are approximately parallel to the edges of the bottom to the rights of which the flaps articulate, and d on the other hand, the members 34, 37 for gripping the sides of the extraction device 33 and the ejection device are arranged for, at the level of the lifting station 30, to produce their gripping action of a flank in the same zone Z for all the different sizes of sidewalls 9 able to be used in the machine. The combination of these technological characteristics makes it possible to give the machine greater adaptability compared with conventional machines. The different adjustment means 381, 382 in the position of the guides 26 of the magazine which ensure the symmetrical displacement of

  these guides are connected to a means 40 for synchronizing their command.

  These last two technological particularities of the machine aim at optimizing the adjustments in order to adapt it

  Dimensionally processing series of trays of different sizes without changing the action positions of the extraction devices 33 and ejection 35.

  According to the invention: on the one hand, the guides 26 that comprise the magazine are two in number by main face 27 of the stack 25 and are arranged substantially parallel to each other and organized in four groups 261 of two guides linked to the less a support member in each of which groups the two guides cooperate with adjacent faces of the stack and the groups of two guides 261 are organized in two sets 262 which are symmetrical with respect to the median plane of the magazine, 25 on the other hand, least one of the symmetrical adjustment means 381 382 acts between at least one of the pairs of pieces that form these sets and the two groups of guides of each set. According to the invention, on the one hand, the adjustment means 381 interposed between the two symmetrical sets of two groups of guides consists of at least one pair of threaded rod portions 42 with opposite pitches which are coaxial and rotatably connected to each other. to an actuator and are guided in rotation in a frame (not shown) that includes the magazine and each cooperate with a nut 43 for its part at least indirectly secured to one of the aforementioned assemblies 261 in translation along the axis of the screw and, on the other hand, the adjustment means 382 interposed between the two groups of guides 26 of each symmetrical assembly essentially comprise an endless and flexible link 44 stretched between deflection members 45 so as to present, in a 5 plane approximately parallel to that of setting the groups of guides considered, two strands stretched 441 '442 to each

  of which one of the groups 261 is connected so as to admit a synchronized and symmetrical displacement to the other group during the actuation of the latter by a control means provided for this purpose.

  Preferably, on the one hand, the adjustment means 381 interposed between the two sets 262 of two groups 261 comprises two pairs of threaded rod portions 42 with opposite pitch of the aforementioned type whose axes 421 are substantially parallel and which are connected between by means 40 for synchronizing their rotation, such as a toothed pulley transmission mechanism 401 and belt 42, and on the other hand, the two return members 45 that essentially comprise each of the two symmetrical assemblies 262 of two groups 261. degu guides 26 are each linked in translation but guided in rotation at least indirectly on one of the nuts 43 announced as integral with each symmetrical assembly. Preferably, the means 39 for adjusting the position of the lifting devices 31, 32 also implement nut mechanisms 46 and threaded portions 47 which are coaxial and in opposite pitch and which are connected by means of synchronization of their movements. According to the invention, on the one hand, the extraction and ejection devices 33 each comprise at least one arm 48 which carries the gripping members 34 and 37 and these arms are each articulated by one of their 481 members. ends 48, 482 about an axis lb which, for example, materialized by members fixed to the frame of the machine, is substantially parallel to the plane of the mounting station above which each plate must be constituted and, d ' on the other hand, these arms 48 are actuated in synchronism by a motor means 49 between two end positions 50, 51 (symbolized by fine mixed lines), an end position 50 in which the gripping members 34 of the extraction device are in position gripping a plate 2 to the right of the mounting station while the gripping members 37 of the ejection device 35 are in a position of release of a sidewall 9 to the right of an evacuation device 36 and another position extre 51 in which the gripping members of each arm 48 of the extraction device 33 and the ejection device are below the side 9 of the volume setting station. The motor means 49 of the arms 48 comprises actuating members 60 of the arms 48 which are interconnected by a

  synchronizing means 61 and, for example, these actuating means 60 consist of crank-crank systems.

  According to the invention: on the one hand, the devices 31, 32 for raising the flaps 5 to 8 lateral and extreme comprise inert members 311, 321, such as abutments 311, 321 against which the extraction device 33 comes to support locally each flank 9 which it takes in the magazine 24, these members 311, 321 being arranged in such a way that by interfering with the flaps 5 to 8 above, they induce their raising as well as those of the locking tabs that they carry. adequate position and secondly, the lifting device 32 of the end flaps 6 further comprises a mechanism 52 comprising movable actuating members in the locked position of each flap hinged on an end flap.30 In accordance with the invention: the mechanism 52 for actuating the flap 8 hinged on each end flap 6 comprises a pusher 53 carried at one 541 of the ends 541 '542 of an arm 54 which: on the one hand, is articulated at its end opposite 542 along an axis lc substantially parallel to that 16 of articulation of said flap 8 on the flap 6 and on a so-called oscillating piece 55, itself articulated at least indirectly on the frame of the machine along an axis id approximately parallel to that 1c articulating the arm 54 and, moreover, linked to a means 56 for controlling its oscillation between two determined positions and. on the other hand, is integral in rotation at least with a toothed wheel 57 which meshes with at least one toothed sector 58 centered on the axis of articulation and immobilized in rotation about its axis, the set of mechanisms 52 of Actuation of the hinged flaps is controlled in synchronism by a motor means 59 itself synchronized with the actuating means 60 of the arms

  48 gripping and ejecting devices.

  The means 60 for actuating the arms 48 and the mechanisms 52 for actuating the flaps 8 in position

  locked are m Qs by the same motor 61.

Claims (6)

  1 machine (1) for setting the volume of trays (2) each comprising a bottom (3) in particular a flat and a peripheral rim (4), these trays being made by successive folding of flaps (5 to 8) of a flank (9) of pre-cut material, each plate (2) comprises, on the one hand, a quadrangular bottom (3), for example rectangular, along the edges (10) of which are articulated two so-called extreme flaps (6) and two lateral flaps (5) which, by their lifting, form the peripheral edge (4) and, on the other hand, means (11) for locking the shutters in the trailing position set volume, the means (11) for locking aforesaid comprise: articulated along each of the extreme edges (12) of each lateral flap (5), a tab (7) intended to be placed in abutment against the inner face (15) of one of the flaps extremes (6) that is to say the face which, after assembly, will be turned towards the extreme opposite shutter, and secondly, articul along the transverse edge (16) of each end flap, a flap (8) intended to be folded towards the inner face (15) of this end flap (6) so as to clamp against the latter the tabs (7) of the ends adjacent to each side flap (5), which flap (8) further comprises at least one member (22) for locking in the pinch position, such as a lug for cooperating with a cutout (23) for example arranged in the bottom of the tray, the tray forming machine being constituted of at least one frame (1a), a magazine (24) for storing a plurality of flanks (9) organized in at least one stack (25). ), which magazine comprises, on the one hand, guides (26) intended to cooperate in guiding the main faces (27) that generally form the succession of fields of the sidewalls of the stack (25) of flanks that the magazine receives and, on the other hand, delimited between the aforementioned guides, two openings (28, 29), of which an upper opening (28) for loading the flanks and a lower opening (29) for unloading the flanks, a station (30) for setting the volume of at least one flank, in particular using devices ( 31, 32) for lifting the extreme and lateral flaps above a plane defined by the bottom of the plate, a device (33) for extracting a sidewall from the magazine and then inserting this flank into the positioning station. in volume, which device comprises at least one member (34) for gripping, a device (35) for ejecting each tray set in volume to a device (36) for evacuation, said ejection device also comprising at least a machine (37) for gripping, this machine being CHARACTERIZED in that on the one hand: the guides (26) of the magazine (24) which are intended to act on opposite faces (27) of a stack (25) of flanks (9) placed in the magazine are carried by means (381 382) for adjusting position which are likely to induce the displacement of these opposite guides substantially symmetrically with respect to each of the median planes of the pile (25) considered that are generally approximately parallel to the faces with which said opposite guides must cooperate, * the devices (31) 32) for lifting the volume station (30) which are intended to act on the flaps (5 to 8) adjoining the bottom to induce their lifting are also carried by means (39) of adjustment in position, which are of such a nature as to induce the displacement of the lifting devices (31, 32) substantially symmetrically with respect to each of the median planes of the pile in question which are approximately parallel to the edges (10) of the bottom to whose rights the flaps are articulated, and on the other hand, the members (34, 37) for gripping the sidewalls of the extraction device (33) and the ejection device (35) are arranged for, at the end of at the lifting station (30), producing their gripping action of a flank in a   same zone (Z) for all the different sizes of flanks (9) able to be used in the machine.   2 Machine according to claim 1 characterized in that: firstly, the guides (26) that comprises the magazine are two in number by main face (27) of the stack (25) and are arranged substantially parallel to each other and arranged in four groups (261) of two guides connected to at least one support member in each of which the two guides cooperate with adjacent faces of the stack and the groups of two guides (261) are organized in two sets (262) which are symmetrical with respect to the median plane of the magazine, on the other hand, at least one of the symmetrical adjustment means (381 382) acts between at least one of the pairs of pieces formed by these sets and the two groups of guides of each set. 3 Machine according to claim 1 or 2 characterized in that: firstly, the means (381) of adjustment interposed between the two symmetrical sets of two groups of guides consists of at least a pair of portions of rods (42) threaded in opposite steps which are coaxial and rotatably connected to each other and to an operating member and are guided in rotation in a frame that includes the magazine and each cooperate with a nut (43) for its part at least indirectly secured to one of aforesaid sets (261) in translation along the axis of the screw and, secondly, the means (382) of adjustment interposed between the two groups of guides (26) of each symmetrical set essentially comprise an endless link and flexible (44) tensioned between deflection members (45) so as to present, in a plane approximately parallel to that of adjustment of the groups of guides considered, two tensioned strands (441 '442) to each of which one groups (261) is connected so as to admit a synchronized and symmetrical displacement to   the other group when actuating the latter by a control means provided for this purpose.   4 Machine according to any one of claims 1 to 3 characterized in c-e-que:   on the one hand, the extraction (33) and ejection devices (35) each comprise at least one arm (48) which carries the gripping members (34, 37) and these arms are each articulated by one (481) of their ends (481, 482) about an axis (1b) which, for example, materialized by members fixed to the frame of the machine, is substantially parallel to the plane of the mounting station above which each tray must be constituted and, on the other hand, these arms (48) are actuated in synchronism by a motor means (49) between two end positions (50, 51) including an end position (50) in which the gripping members of the extraction device (34) are in the situation of gripping a plate (2) to the right of the mounting station while the members (37) for gripping the ejection device (35) are in a position of release from a flank (9) in line with an evacuation device (36) and another end position (51) in the uelle the gripping members of each arm (48) of the extraction device (33) and the ejection device are below the side (9) of the setting station   volume. Machine according to any one of Claims 1 to 4, characterized in that:   on the one hand, the devices (31, 32) for raising the flaps (5 to 8) on the side and the ends comprise inert members (311, 321) against which the extraction device (33) locally presses each flank (9 ) it draws in the magazine (24), these bodies (311, 321) being arranged so that by interfering with the flaps (5 to 8) above, they induce their recovery as well as those locking lugs that in the correct position and on the other hand, the lifting device (32) of the end flaps (6) further comprises a mechanism (52) comprising   movable actuating members in the locked position of each flap articulated on an end flap.   Machine according to any one of Claims 1 to 5, characterized in that:   the mechanism (52) for actuating the flap (8) articulated on each end flap (6) comprises a pusher (53) carried on one (541 of the ends (541 542) of an arm (54) which * d on the one hand, is articulated at its opposite end (542) along an axis (1c) substantially parallel to that (16) of articulation of said flap (8) on the flap (6) and this, on a so-called oscillating piece (55), itself articulated at least indirectly on the frame (la) of the machine along an axis (1 d) approximately parallel to that of articulation of the arm (54) 10 and, moreover, linked to means (56) for controlling its oscillation between two determined positions and, on the other hand, is rotationally integral with at least one toothed wheel (57) which meshes with at least one tooth sector (58) centered on the hinge pin and immobilized in rotation around its axis, all mechanisms (52) for actuating hinged flaps are controlled in synchronism me by motor means (59)   it is synchronized with the actuating means (60) of the arms (48) of the grasping and ejecting devices.20 7 Machine according to any one of claims 1 to 6, characterized in that the different adjustment means ( 381   382) in position of the magazine guides (26) which ensure the symmetrical displacement of these guides are connected to a means (40)   The machine according to any one of claims 1 to 7, characterized in that the various adjustment means (39)   position of the lifting devices (31, 32) are connected to means (41) for synchronizing their control.