EP0334707B1 - Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby - Google Patents

Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby Download PDF

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Publication number
EP0334707B1
EP0334707B1 EP89400662A EP89400662A EP0334707B1 EP 0334707 B1 EP0334707 B1 EP 0334707B1 EP 89400662 A EP89400662 A EP 89400662A EP 89400662 A EP89400662 A EP 89400662A EP 0334707 B1 EP0334707 B1 EP 0334707B1
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EP
European Patent Office
Prior art keywords
mandrel
panels
flaps
folding
lines
Prior art date
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Expired - Lifetime
Application number
EP89400662A
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German (de)
French (fr)
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EP0334707A1 (en
Inventor
Jean-Claude Serre
Guy Coalier
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Otor SA
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Otor SA
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Priority to AT89400662T priority Critical patent/ATE91662T1/en
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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
    • 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
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms
    • B31B50/282—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms involving stripping-off formed boxes from mandrels
    • 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
    • B31B2100/0022—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 made from tubular webs or blanks, including by tube or bottom forming operations
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/06—Feeding sheets or blanks from stacks
    • B31B50/066—Feeding sheets or blanks from stacks from above a magazine
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/07—Feeding sheets or blanks by air pressure or suction
    • 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
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms

Definitions

  • the present invention relates to a method and a machine for producing cardboard boxes, corrugated cardboard or similar sheet material, having a polygonal section, and in particular with a square or rectangular section.
  • boxes of this type are formed from a single blank of the sheet material, comprising a set of flaps (at least three) connected to each other by parallel fold lines and provided laterally with flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps and intended to form the bottom and the cover of said boxes.
  • the free edge of one of the end flaps of said assembly is provided with a tongue connected to said end flap by a fold line parallel to those connecting said flaps and intended to be fixed against the free edge of the opposite end flap.
  • the box can be formed precisely from said blank provided with preformed fold lines, when it is desired to have it, for example for product packaging. .
  • said mandrel is arranged at a fixed station and said blank is brought to said mandrel by a translational movement, in direction parallel to said fold lines connecting said flaps.
  • At least one of said flaps is horizontal.
  • it can rest on a table arranged under said mandrel. It is then advantageous for the direction of the translation of supply of said blank to be also horizontal, so that the supply of the blank to the mandrel and the placing of said blank under it can be carried out by simple sliding on said table.
  • the fixing of said tab on the free edge of said other end flap and / or the fixing between them of said flaps can be carried out by gluing.
  • the face of the mandrel against which said flaps are folded is made mobile.
  • the machine according to the invention comprises a horizontal table disposed under said mandrel and means for bringing said blank under said mandrel, by sliding on said table, as well as means for locally gluing said blank when it is brought under said mandrel. .
  • the machine may include means for ejecting the body from the mandrel, formed at least partially by said face of the mandrel against which said flaps are folded.
  • said means for winding said set of flaps around the mandrel comprise a movable assembly, provided with fixed stops and tilting arms.
  • Figures 1a, 1b, 1c and 1d illustrate the process according to the invention of forming a box, applied to a particular embodiment of such a box.
  • Figures 2a, 2b and 2c schematically explain the transverse positioning of a blank relative to the mandrel.
  • Figure 3 is a longitudinal sectional view of a machine according to the invention.
  • FIG. 4 is a cross section along the line IV-IV of FIG. 3.
  • FIG. 5 is a schematic and partial top view of the machine of FIGS. 3 and 4.
  • FIG. 6 is a schematic view, partial and simplified, corresponding to the longitudinal section of FIG. 3.
  • Figures 7 and 8 are schematic views, partial and simplified, corresponding to the cross section of Figure 4.
  • Figures 6,7 and 8 are intended to illustrate the operation of the machine of Figures 3 and 4. They each include, for clarity, only part of the elements of said machine.
  • the blank 1 of sheet material, for example of cardboard or corrugated cardboard, shown in FIG. 1 a comprises a set of four aligned flaps 2, 3, 4 and 5, two by two connected by preformed and parallel fold lines 6 , 7 and 8. These parallel fold lines 6, 7 and 8 are respectively arranged between the flaps 2 and 3, 3 and 4, and 4 and 5. Along the free edge of the end flap 2 of said set of flaps 2 to 5 a tongue 9 is arranged, connected to said end flap 2 by a fold line 10, parallel to the fold lines 6, 7 and 8.
  • each lateral flap 11.2 to 11.5 is articulated to the corresponding flap 2 to 5 by a preformed fold line 13.2 to 13.5.
  • the fold lines 13.2 to 13.5 are aligned and perpendicular to the fold lines 6,7 and 8.
  • each lateral flap 12.2 to 12.5 is articulated to the corresponding flap 2 to 5 by a preformed fold line 14.2 to 14.5.
  • the fold lines 14.2 to 14.5 are aligned and perpendicular to the fold lines 6,7 and 8.
  • Adhesive lines 16, 17 and 18 are deposited, on the one hand on the upper face (in relation to FIG. 1a) of the end flap 5, along the free edge 5.L thereof, and, d 'other hand on the underside (relative to Figure 1a) of the flaps 11.2 and 11.4.
  • a mandrel 19 is provided, the external shape of which corresponds to the internal shape of the box to be obtained from the blank 1.
  • a mandrel may be solid or only made up of a delimiting frame its edges.
  • the blank 1 is placed relative to the mandrel 19 so that its flap 3 is applied against the corresponding underside of said mandrel, then the flaps 2 and 4 are folded around the edges of the latter corresponding to the fold lines 6 and 7, so as to be applied against the corresponding lateral faces of said mandrel 19 (see FIG. 1b).
  • the flap 5 and the tongue 9 are respectively folded around the edges of said mandrel corresponding respectively to the fold lines 8 and 9, to come to be applied on the upper face of said mandrel 19, the tongue 9 being located under the flap 5 (see Figure 1C).
  • a pressure exerted on the flap 5 makes it possible to press the edge 5.L thereof on said tongue, so that, thanks to the line of adhesive 16, the flap 5 and the tongue 9 are secured to one of the 'other.
  • the flaps 11.2 and 11.4 are folded around the edges of the mandrel 19 corresponding respectively to the fold lines 13.2 and 13.4, to come to bear against the corresponding lateral face of the mandrel 19 (see also Figure 16).
  • the flaps 11.3 and 11.5 are folded around the edges of the mandrel 19 corresponding respectively to the fold lines 13.3 and 13.5 and applied against the flaps 11.2 and 11.4 already folded, so that said flaps 11.2 to 11.5 are made integral with each other. others, using the adhesive lines 17 and 18 (see Figure 1d). We then obtain the box 20 shown in Figure 1d, lying on the flap 3 and open on the side of the flaps 12.2 to 12.5.
  • this box 20 To fill this box 20, it is released from the mandrel 19 and can be straightened to rest on its bottom 21 consisting of integral flaps 11.2 to 11.5. After filling, the box 20 can be closed by folding the flaps 12.2 to 12.5, respectively around the fold lines 14.2 to 14.5, then securing said flaps 12.2 to 12.5 therebetween, for example by gluing.
  • FIGS. 2a to 2c the process of positioning the blank 1 relative to the mandrel has been illustrated diagrammatically, when it is desired to apply the flap 3 against the corresponding underside of the mandrel 19.
  • said mandrel 19 consisted of profiles 22 (seen in section), parallel and with rectangular sections, defining virtual bearing faces 23 to 26, respectively for the flaps 2 to 5, as well as folding edges 27 to 30, corresponding respectively at fold lines 6,7,8 and 10.
  • a blank 1 is brought in the vicinity of the mandrel 19, so that its flap 3 is disposed opposite the bearing face 24.
  • the lateral positioning of said flap 3 relative to said face 24 is sought as precise as possible, it may happen that a lateral offset l appears between the flap 3 and said bearing face 24.
  • the flap 3 is spaced from the bearing face 24 by a distance d (see FIG. 2a). Then, during the folding down of said flaps 2 and 4, the flap 3 is brought closer to the bearing face 24 by means of a plate 31, preferably exactly superimposed on said bearing face 24.
  • the flaps 2 and 4 are in abutment against the mandrel 19 (see FIG. 2b) which generates a guiding effect and exactly positions the flap 3 relative to the face d 'support 24.
  • the plate 31 presses the flap 3 between the support face 24, the fold lines 6 and 7 are exactly superimposed on the fold edges 27 and 28, so that, after final folding of the flaps 2 and 4 , respectively against the bearing faces 23 and 25, the fold lines 8 and 10 are also exactly superimposed on the fold edges 29 and 30 (see FIG. 2c).
  • the machine comprises a frame 32 with respect to which are arranged a station 33 for supplying blanks 1, a station 34 for shaping said blanks around said mandrel 19 and a station 35 of evacuation of the finished cases 20. Between the feed station 33 and the shaping station 34 is disposed a horizontal table 36, provided with longitudinal slots 37 through which the drive fingers 38 can pass.
  • the feeding station 33 includes a magazine 39 containing a stack of blanks 1, as well as means 40 for taking, for example by suction, the upper blank 1 of said stack of blanks.
  • Said gripping means 40 are movable, under the action of motor means 41, in order to be able to successively take the blanks 1 from the magazine 39 and deposit them on the table 36, upstream of the shaping station 34.
  • the drive fingers 38 moved by motor means 42, slide the blank 1, thus removed, onto the table 36 and deposited to bring it under the mandrel 19 of the shaping station 34.
  • the blank 1 encounters glueers 43, 44 and 45, integral with the frame 32, and depositing the lines of adhesive 16, 17 and 18 respectively.
  • the blank 1 is arranged, already glued, under the mandrel 19 in the position shown in FIG. 2a, above the pressure plate 31, moved by a cylinder 46.
  • the shaping station 34 includes the mechanism 47, shown in Figures 3,4,7 and 8.
  • This mechanism 47 includes a movable assembly 48 which can be raised or lowered by means of a jack 49, bearing on the frame 32.
  • the moving element 48 comprises two stops 50 and 51, capable of folding down the flaps 2 and 4, respectively against the bearing faces 23 and 25 of the mandrel 19 (see also FIG. 2b), when the moving element 48 is brought together of the mandrel 19.
  • said movable assembly 48 comprises articulated arms 52 and 53, for folding the flap 5 and the tongue 9 respectively against the face 26 of the mandrel 19, after the flaps 2 and 4 are folded down between the bearing faces 23 and 25.
  • the arm 52 is moved by a jack 54, while the arm 53 is actuated by a linkage 55, connected to the frame 32.
  • a transverse plate 56 serving as an end face to said mandrel 19 and driven by a jack 57.
  • Actuators 58 and 59 can fold the flaps 11.2 and 11.4 respectively against the plate 56.
  • the flap 5 After squaring, the flap 5 is applied against the bearing face 26 by an arm 61, tilting under the action of a jack 69. The flap 5 is then secured to the tongue 9, via the line d adhesive 16.
  • jacks 62 and 63 optionally by means of tilting plates 64 and 65, apply the flaps 11.3 and 11.5 against the flaps 11.2 and 11.4, previously folded against the plate 56. Said flaps 11.2 to 11.5 are thus secured by means of the lines of adhesive 17 and 18, forming the bottom 21.
  • the box then appears as shown in Figure 1d.
  • the evacuation station 35 comprises two conveyors 67 and 68 in steps, so that when the box 20 is ejected from the mandrel by the action of the jack 57, the latter rocks passing from the conveyor 67 to the conveyor 68 and is evacuated by the latter. ci, on which it rests by its bottom 21.
  • a cabinet 70 contains the means for controlling and synchronizing the various components of the machine described above.

Landscapes

  • Making Paper Articles (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Refrigerator Housings (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Electron Beam Exposure (AREA)
  • Golf Clubs (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Cartons (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Paper (AREA)

Abstract

Method and machine for the production of a polygonal box from a blank (1) of sheet material comprising a set of panels (2, 3, 4, 5). <??>According to the invention: - the said set of panels (2 to 5) is rolled about a mandrel having a polygonal cross section; - the tongue (9) is fixed to the free edge (19) of the end panel (5); - the flaps (11.2 to 11.5) on the same side as the said panels (2 to 5) are folded; and - the said flaps (11.2 to 11.5) thus folded are fixed to each other. <??>Manufacture of American boxes. <IMAGE>

Description

La présente invention concerne un procédé et une machine pour la réalisation de caisses de carton, de carton ondulé ou de matière en feuille analogue, présentant une section polygonale, et notamment à section carrée ou rectangulaire.The present invention relates to a method and a machine for producing cardboard boxes, corrugated cardboard or similar sheet material, having a polygonal section, and in particular with a square or rectangular section.

On sait que les caisses de ce type sont formées à partir d'un flan unique de la matière en feuille, comportant un ensemble de volets (au moins trois) reliés les uns aux autres par des lignes de pliage parallèles et pourvus latéralement de rabats, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets et destinés à former le fond et le couvercle desdites caisses. Le bord libre d'un des volets extrêmes dudit ensemble est pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle à celles reliant lesdits volets et destinée à venir se fixer contre le bord libre du volet extrême opposé.We know that boxes of this type are formed from a single blank of the sheet material, comprising a set of flaps (at least three) connected to each other by parallel fold lines and provided laterally with flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps and intended to form the bottom and the cover of said boxes. The free edge of one of the end flaps of said assembly is provided with a tongue connected to said end flap by a fold line parallel to those connecting said flaps and intended to be fixed against the free edge of the opposite end flap.

Les caisses connues de ce type sont dites "américaines" et elles présentent une section (transversalement auxdits volets) carrée ou rectangulaire. Leur fabrication est réalisée par un industriel cartonnier qui, à partir dudit flanc, forme une ébauche aplatie de caisse par pliage dudit flan autour de la ligne de pliage médiane dudit ensemble de volets et fixation de ladite languette sur le volet extrême opposé. A ce moment ladite ébauche présente donc une section en parallélogramme aplati, lesdits rabats latéraux prolongeant respectivement les volets correspondant vers l'extérieur. Ensuite, ces ébauches aplaties sont livrées à un utilisateur, qui, pour y loger des objets à emballer, les met en forme par expansion parallèlement à la diagonale aplatie dudit parallalélogramme, puis replie et colle lesdits rabats pour former le fond, et, après remplissage, le couvercle de ladite caisse.The known cases of this type are said to be "American" and they have a square or rectangular section (transverse to said flaps). Their manufacture is carried out by a cardboard industrialist who, from said flank, forms a flattened box blank by folding said blank around the median fold line of said set of flaps and fixing said tab on the opposite end flap. At this time said blank therefore has a flattened parallelogram section, said lateral flaps respectively extending the corresponding flaps outwards. Then, these flattened blanks are delivered to a user, who, to accommodate objects to be packaged there, shapes them by expansion parallel to the flattened diagonal of said parallelogram, then folds and glues said flaps to form the bottom, and, after filling , the cover of said box.

Un tel processus de fabrication et d'utilisation présente de nombreux inconvénients. En effet :

  • . bien entendu, tant la fabrication des ébauches aplaties chez le cartonnier que la mise en forme desdites ébauches chez l'utilisateur sont réalisées à l'aide de machines automatiques. On voit donc que l'on est donc obligé d'utiliser deux machines automatiques complexes et donc coûteuses, ce qui grève le coût d'utilisation desdites caisses ;
  • . à cause des rabats latéraux, il est difficile de guider rigoureusement les bords du flan au moment de la fixation de la languette sur le volet extrême opposé, de sorte que l'équerrage est mauvais et que la ligne de collage obtenue n'est pas rigoureusement parallèle aux lignes de pliage reliant lesdits volets ; la section de la caisse n'est donc pas rigoureusement identique entre le fond et le couvercle et il en résulte des défauts de présentation des caisses, qui nuisent à la qualité de celles-ci ;
  • . les ébauches aplaties présentent une surépaisseur médiane, puisque localement, l'ébauche aplatie comporte trois épaisseurs, au lieu de deux. Cette surépaisseur a pour effet de déséquilibrer les piles d'ébauches formées pour le stockage et le transport desdites ébauches. Il en résulte des difficultés de manutention desdites piles ;
  • . à cause des surépaisseurs mentionnées ci-dessus, le nombre d'ébauches aplaties que l'on peut loger dans le magasin d'alimentation de la machine de formage et de remplissage chez l'utilisateur est limitée ;
  • . les lignes de pliage intermédiaires des volets se trouvent pliées au maximum lors de la formation des ébauches aplaties ; de plus, les lignes de pliage intermédiaires forment les arêtes extérieures desdites ébauches. Par suite, elles sont fragilisées par l'aplatissement des ébauches et sujettes à des agressions extérieures. Il en résulte que ces lignes de pliage intermédiaires forment des lignes de moindre résistance pour lesdites caisses ;
  • . les volets desdites caisses sont forcément au nombre de quatre et deux à deux identiques.
  • . du fait des imprécisions de fixation et de la fragilisation des arêtes, il est nécessaire d'utiliser une matière en feuille de grande qualité. Le coût desdites caisses est donc élevé.
Such a manufacturing and use process has many drawbacks. Indeed :
  • . of course, both the manufacture of the flat blanks in the cardboard box and the shaping of said blanks in the user are carried out using automatic machines. It can therefore be seen that we are therefore obliged to use two complex and therefore expensive automatic machines, which increases the cost of using said cases;
  • . because of the side flaps, it is difficult to rigorously guide the edges of the blank when fixing the tongue on the opposite end flap, so that the squareness is poor and the bonding line obtained is not rigorously parallel to the fold lines connecting said flaps; the section of the box is therefore not strictly identical between the bottom and the cover and this results in defects in presentation of the boxes, which adversely affect the quality of the latter;
  • . the flattened blanks have a median allowance, since locally, the flattened blank has three thicknesses, instead of two. This extra thickness has the effect of unbalancing the stacks of blanks formed for the storage and transport of said blanks. This results in difficulties in handling said batteries;
  • . because of the above-mentioned extra thicknesses, the number of flattened blanks that can be accommodated in the feed store of the forming and filling machine at the user's is limited;
  • . the intermediate fold lines of the flaps are folded to the maximum during the formation of the flattened blanks; in addition, the intermediate fold lines form the outer edges of said blanks. As a result, they are weakened by the flattening of the blanks and subject to external aggressions. As a result, these intermediate fold lines form lines of least resistance for said boxes;
  • . the flaps of said boxes are necessarily four in number and two to two identical.
  • . due to inaccuracies in fixing and weakening of the edges, it is necessary to use a high-quality sheet material. The cost of said cases is therefore high.

Par ailleurs, par le document FR-A-1 051 421, on connaît déjà une machine destinée à former des récipients par enroulement d'un flan de carton pourvu de lignes de pliage, autour d'un conformateur mobile coopérant avec des feuilles de pliage latérales.Furthermore, from document FR-A-1 051 421, a machine is already known for forming containers by winding a cardboard blank provided with fold lines, around a movable shaper cooperating with fold sheets side.

La présente invention a pour objet de permettre d'obtenir des emballages de qualité par enroulement d'un flan de matière en feuille, pourvu de lignes de pliage, autour d'un mandrin. Elle permet d'éviter les' inconvénients d'un défaut de précision du positionnement du flan par rapport au mandrin, ce qui entraînerait le pliage du flan le long de lignes différentes des lignes de pliage préformées. L'invention permet de plus de former complétement une caisse du type ci-dessus, directement à partir du flan en matière en feuille pourvu de lignes de pliage préformées, sans passer par le stade intermédiaire de la l'ormation de l'ébauche aplatie.
Ainsi, la présente invention permet :

  • . de supprimer la machine automatique de pliage et de collage des ébauches aplaties chez le cartonnier ;
  • . de stocker et transporter à plat lesdits flans, de sorte que l'on élimine les inconvénients dus aux surépaisseurs mentionnées, c'est-à-dire les difficultés de manutention et les limitations de l'alimentation de la machine de l'utilisateur (en fait, la capacité du magasin de celle-ci est multipliée par trois, à hauteur égale) ; la machine a donc une autonomie de fonctionnement beaucoup plus grande.
  • . de ce qui précède, il résulte que les lignes de pliage intermédiaires ne sont plus des lignes de faiblesse ;
  • . de fabriquer des caisses dont le nombre des volets est quelconque (au moins égal à trois) et dont les volets peuvent présenter des largeurs différentes ;
  • . de fabriquer des caisses de grande qualité en ce qui concerne l'équerrage et la rigueur de la dimension intérieure, même avec des matières en feuille de moindre qualité.
The object of the present invention is to enable quality packaging to be obtained by winding a blank of sheet material, provided with fold lines, around a mandrel. It avoids the drawbacks of a lack of precision in positioning the blank relative to the mandrel, which would cause the blank to be folded along lines other than the preformed fold lines. The invention further makes it possible to completely form a box of the above type, directly from the blank of sheet material provided with preformed fold lines, without passing through the intermediate stage of the formation of the flattened blank.
Thus, the present invention allows:
  • . eliminating the automatic folding and gluing machine for flat blanks in the cardboard box;
  • . to store and transport said blanks flat, so that the drawbacks due to the mentioned extra thicknesses are eliminated, that is to say the handling difficulties and the limitations of supplying the machine to the user (in fact, the capacity of the store is multiplied by three, at equal height); the machine therefore has a much greater operating autonomy.
  • . from the above, it follows that the intermediate fold lines are no longer lines of weakness;
  • . to manufacture cases the number of flaps of which is arbitrary (at least equal to three) and the flaps of which may have different widths;
  • . to manufacture high-quality cases with regard to squareness and the rigor of the interior dimension, even with sheet materials of lower quality.

A cette fin, selon l'invention, le procédé pour la réalisation d'une caisse à section polygonale à partir d'un flan de matière en feuille comportant un ensemble de volets reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets et destinés à former respectivement le fond et le couvercle de ladite caisse, le bord libre d'un des volets extrêmes dudit ensemble de volets étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, procédé selon lequel on enroule ledit ensemble de volets autour d'un mandrin à section polygonale, de façon que chacun desdits volets s'applique contre une face dudit mandrin et que lesdites lignes de pliage reliant lesdits volets soient en appui contre une arête correspondante dudit mandrin, après quoi :

  • on fixe ladite languette au bord libre de l'autre desdits volets extrêmes dudit ensemble de volets ;
  • on replie les rabats se trouvant d'un même côté desdits volets contre une face correspondante dudit mandrin, autour des lignes de pliage correspondantes ; et
  • on fixe les uns aux autres lesdits rabats ainsi repliés ;
    est caractérisé en ce que :
  • avant d'enrouler ledit ensemble de volets autour dudit mandrin, dont la section extérieure correspond à la section intérieure de ladite caisse à obtenir, on place un volet intermédiaire déplaçable librement et faisant partie dudit ensemble de volets, au moins approximativement en regard de la face correspondante dudit mandrin immobile mais à quelque distance de celle-ci, puis on replie les volets adjacents audit volet intermédiaire en rapprochant ledit volet intermédiaire en direction de ladite face correspondante dudit mandrin, de sorte que, pendant le rapprochement dudit volet intermédiaire de ladite face correspondante du mandrin, lesdits volets adjacents audit volet intermédiaire viennent en appui contre le mandrin, ce qui engendre une translation dudit volet intermédiaire par rapport à ladite face correspondante du mandrin et positionne exactement le volet intermédiaire et les lignes de pliage dudit volet intermédiaire par rapport à ladite face correspondante du mandrin.
To this end, according to the invention, the method for producing a box with polygonal section from a blank of sheet material comprising a set of flaps connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps and intended to respectively form the bottom and the cover of said box, the free edge of one of the extreme flaps of said set of flaps being provided with 'a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, method according to which said set of flaps is wound around a mandrel of polygonal section, so that each of said flaps is applied against a face of said mandrel and that said fold lines connecting said flaps bear against a corresponding edge of said mandrel, after which:
  • said tongue is fixed to the free edge of the other of said end flaps of said set of flaps;
  • folding the flaps located on the same side of said flaps against a corresponding face of said mandrel, around the corresponding fold lines; and
  • said flaps thus folded are fixed to each other;
    is characterized in that:
  • before winding said set of flaps around said mandrel, the outer section of which corresponds to the inner section of said box to be obtained, place a freely movable intermediate flap forming part of said set of flaps, at least approximately opposite the corresponding face of said stationary mandrel but at some distance from it, then the flaps adjacent to said intermediate flap are folded by bringing said intermediate flap in the direction of said corresponding face of said mandrel, so that, during the approximation of said intermediate flap of said corresponding face of the mandrel, said flaps adjacent to said intermediate flap bear against the mandrel, which causes a translation of said intermediate flap relative to said face corresponding to the mandrel and exactly positions the intermediate flap and the fold lines of said intermediate flap relative to said corresponding face of the mandrel.

Ainsi, grâce à l'invention, la caisse peut être formée de façon précise à partir dudit flan pourvu de lignes de pliage préformées, au moment où l'on désire disposer de celle-ci, par exemple en vue de l'emballage de produit.Thus, thanks to the invention, the box can be formed precisely from said blank provided with preformed fold lines, when it is desired to have it, for example for product packaging. .

Dans un mode de mise en oeuvre avantageux, ledit mandrin est disposé à poste fixe et ledit flan est amené audit mandrin par un mouvement de translation, de direction parallèle auxdites lignes de pliage reliant lesdits volets.In an advantageous embodiment, said mandrel is arranged at a fixed station and said blank is brought to said mandrel by a translational movement, in direction parallel to said fold lines connecting said flaps.

De plus, il est préférable que, pendant l'enroulement dudit ensemble de volets autour du mandrin et le repliement desdits rabats sur ce dernier, au moins l'un desdits volets soit horizontal. Ainsi, il peut reposer sur une table disposée sous ledit mandrin. Il est alors avantageux que la direction de la translation d'amenée dudit flan soit également horizontale, de sorte que l'amenée du flan au mandrin et la mise en place dudit flan sous celui-ci peuvent être réalisées par simple glissement sur ladite table.In addition, it is preferable that, during the winding of said set of flaps around the mandrel and the folding of said flaps on the latter, at least one of said flaps is horizontal. Thus, it can rest on a table arranged under said mandrel. It is then advantageous for the direction of the translation of supply of said blank to be also horizontal, so that the supply of the blank to the mandrel and the placing of said blank under it can be carried out by simple sliding on said table.

La fixation de ladite languette sur le bord libre dudit autre volet extrême et/ou la fixation entre eux desdits rabats peut être réalisée par collage.The fixing of said tab on the free edge of said other end flap and / or the fixing between them of said flaps can be carried out by gluing.

Par ailleurs, notamment pour permettre l'extraction du flan du mandrin, on rend mobile la face du mandrin contre laquelle sont repliés lesdits rabats.Furthermore, in particular to allow the extraction of the blank from the mandrel, the face of the mandrel against which said flaps are folded is made mobile.

La présente invention concerne de plus une machine pour la réalisation d'une caisse à section polygonale à partir d'un flan de matière en feuille comportant un ensemble de volets reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets et destinés à former respectivement le fond et le couvercle de ladite caisse, le bord libre d'un des volets extrêmes dudit ensemble de volets étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, machine comportant :

  • un mandrin à section polygonale dont la section extérieure dudit mandrin correspond à la section intérieure de ladite caisse à obtenir ;
  • des moyens pour enrouler ledit ensemble de volets autour dudit mandrin ;
  • des moyens pour fixer ladite languette au bord libre de l'autre desdits volets extrêmes dudit ensemble de volets ;
  • des moyens pour replier les rabats se trouvant d'un même côté desdits volets contre une face correspondante dudit mandrin ; et
  • des moyens pour fixer les uns aux autres lesdits rabats ainsi repliés,
    caractérisée :
  • en ce qu'elle comporte un support, mobile entre une première position, pour laquelle il supporte librement un volet intermédiaire dudit ensemble de volets au moins approximativement en regard de la face correspondante dudit mandrin immobile, mais à quelque distance de celle-ci, et une seconde position, pour laquelle ledit support presse ledit volet intermédiaire contre la face correspondante dudit mandrin ; et
  • en ce qu'elle comporte des moyens pour mouvoir ledit support entre ces deux positions, le mouvement dudit support se faisant pendant le repliement des volets adjacents audit volet intermédiaire.
The present invention further relates to a machine for producing a box with a polygonal section from a blank of sheet material comprising a set of flaps connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps and intended to respectively form the bottom and the cover of said box, the free edge of one of the extreme flaps of said set of flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, machine comprising:
  • a mandrel with a polygonal section, the outside section of said mandrel corresponding to the inside section of said box to be obtained;
  • means for winding said set of flaps around said mandrel;
  • means for fixing said tongue to the free edge of the other of said end flaps of said set of flaps;
  • means for folding the flaps located on the same side of said flaps against a corresponding face of said mandrel; and
  • means for fixing said flaps thus folded to each other,
    characterized:
  • in that it comprises a support, movable between a first position, for which it freely supports an intermediate flap of said set of flaps at least approximately opposite the corresponding face of said stationary mandrel, but at some distance therefrom, and a second position, for which said support presses said intermediate flap against the corresponding face of said mandrel; and
  • in that it comprises means for moving said support between these two positions, the movement of said support taking place during the folding of the flaps adjacent to said intermediate flap.

De préférence, la machine selon l'invention comporte une table horizontale disposée sous ledit mandrin et des moyens pour amener ledit flan sous ledit mandrin, par glissement sur ladite table, ainsi que des moyens pour encoller localement ledit flan lors de son amenée sous ledit mandrin.Preferably, the machine according to the invention comprises a horizontal table disposed under said mandrel and means for bringing said blank under said mandrel, by sliding on said table, as well as means for locally gluing said blank when it is brought under said mandrel. .

Il est avantageux qu'elle comporte des moyens pour redresser verticalement ladite caisse en vue de son évacuation. La machine peut comporter des moyens d'éjection de la caisse du mandrin, constitués au moins partiellement par ladite face du mandrin contre laquelle sont repliés lesdits rabats.It is advantageous that it includes means for vertically straightening said box with a view to its evacuation. The machine may include means for ejecting the body from the mandrel, formed at least partially by said face of the mandrel against which said flaps are folded.

Selon un mode avantageux de réalisation, dans la machine conforme à l'invention, lesdits moyens pour enrouler ledit ensemble de volets autour du mandrin comportent un équipage mobile, pourvu de butées fixes et de bras basculants.According to an advantageous embodiment, in the machine according to the invention, said means for winding said set of flaps around the mandrel comprise a movable assembly, provided with fixed stops and tilting arms.

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.The figures of the appended drawing will make it clear how the invention can be implemented. In these figures, identical references designate similar elements.

Les figures 1a, 1b, 1c et 1d illustrent le processus conforme à l'invention de formation d'une caisse, appliqué à un mode de réalisation particulier d'une telle caisse.Figures 1a, 1b, 1c and 1d illustrate the process according to the invention of forming a box, applied to a particular embodiment of such a box.

Les figures 2a, 2b et 2c expliquent schématiquement le positionnement transversal d'un flan par rapport au mandrin.Figures 2a, 2b and 2c schematically explain the transverse positioning of a blank relative to the mandrel.

La figure 3 est une vue en coupe longitudinale d'une machine conforme à l'invention.Figure 3 is a longitudinal sectional view of a machine according to the invention.

La figure 4 est une coupe transversale selon la ligne IV-IV de la figure 3.FIG. 4 is a cross section along the line IV-IV of FIG. 3.

La figure 5 est une vue de dessus schématique et partielle, de la machine des figures 3 et 4.FIG. 5 is a schematic and partial top view of the machine of FIGS. 3 and 4.

La figure 6 est une vue schématique, partielle et simplifiée, correspondant à la coupe longitudinale de la figure 3.FIG. 6 is a schematic view, partial and simplified, corresponding to the longitudinal section of FIG. 3.

Les figures 7 et 8 sont des vues schématiques, partielles et simplifiées, correspondant à la coupe transversale de la figure 4.Figures 7 and 8 are schematic views, partial and simplified, corresponding to the cross section of Figure 4.

Les vues schématiques, partielles et simplifiées des figures 6,7 et 8 sont destinées à illustrer le fonctionnement de la machine des figures 3 et 4. Elles ne comportent chacune, à des fins de clarté, qu'une partie des éléments de ladite machine.The schematic, partial and simplified views of Figures 6,7 and 8 are intended to illustrate the operation of the machine of Figures 3 and 4. They each include, for clarity, only part of the elements of said machine.

Le flan 1 de matière en feuille, par exemple de carton ou de carton ondulé, montré par la figure la comporte un ensemble de quatre volets alignés 2,3,4 et 5, deux à deux reliés par des lignes de pliage préformées et parallèles 6,7 et 8. Ces lignes de pliage parallèles 6,7 et 8 sont respectivement disposées entre les volets 2 et 3, 3 et 4, et 4 et 5. Le long du bord libre du volet extrême 2 dudit ensemble de volets 2 à 5 est disposée une languette 9, reliée audit volet extrême 2 par une ligne de pliage 10, parallèle aux lignes de pliage 6,7 et 8.The blank 1 of sheet material, for example of cardboard or corrugated cardboard, shown in FIG. 1 a comprises a set of four aligned flaps 2, 3, 4 and 5, two by two connected by preformed and parallel fold lines 6 , 7 and 8. These parallel fold lines 6, 7 and 8 are respectively arranged between the flaps 2 and 3, 3 and 4, and 4 and 5. Along the free edge of the end flap 2 of said set of flaps 2 to 5 a tongue 9 is arranged, connected to said end flap 2 by a fold line 10, parallel to the fold lines 6, 7 and 8.

Par ailleurs, de part et d'autre de chaque volet 2 à 5, sont prévus des rabats 11.2, 11.3, 11.4, 11.5 et 12.2, 12.3, 12.4, 12.5. Chaque rabat latéral 11.2 à 11.5 est articulé au volet 2 à 5 correspondant par une ligne de pliage préformée 13.2 à 13.5. Les lignes de pliage 13.2 à 13.5 sont alignées et perpendiculaires aux lignes de pliage 6,7 et 8. De même, chaque rabat latéral 12.2 à 12.5 est articulé au volet 2 à 5 correspondant par une ligne de pliage préformée 14.2 à 14.5. Les lignes de pliage 14.2 à 14.5 sont alignées et perpendiculaires aux lignes de pliage 6,7 et 8.Furthermore, on each side of each flap 2 to 5, flaps 11.2, 11.3, 11.4, 11.5 and 12.2, 12.3, 12.4, 12.5 are provided. Each lateral flap 11.2 to 11.5 is articulated to the corresponding flap 2 to 5 by a preformed fold line 13.2 to 13.5. The fold lines 13.2 to 13.5 are aligned and perpendicular to the fold lines 6,7 and 8. Similarly, each lateral flap 12.2 to 12.5 is articulated to the corresponding flap 2 to 5 by a preformed fold line 14.2 to 14.5. The fold lines 14.2 to 14.5 are aligned and perpendicular to the fold lines 6,7 and 8.

On dépose des lignes d'adhésif 16,17 et 18, d'une part sur la face supérieure (en rapport à la figure 1a) du volet extrême 5, le long du bord libre 5.L de celui-ci, et, d'autre part sur la face inférieure (par rapport à la figure 1a) des rabats 11.2 et 11.4.Adhesive lines 16, 17 and 18 are deposited, on the one hand on the upper face (in relation to FIG. 1a) of the end flap 5, along the free edge 5.L thereof, and, d 'other hand on the underside (relative to Figure 1a) of the flaps 11.2 and 11.4.

Selon l'invention (voir la figure 1b), on prévoit un mandrin 19 dont la forme extérieure correspond à la forme intérieure de la caisse à obtenir à partir du flan 1. Un tel mandrin peut être plein ou seulement constitué d'une armature délimitant ses arêtes.According to the invention (see FIG. 1b), a mandrel 19 is provided, the external shape of which corresponds to the internal shape of the box to be obtained from the blank 1. Such a mandrel may be solid or only made up of a delimiting frame its edges.

Le flan 1 est disposé par rapport au mandrin 19 de façon que son volet 3 soit appliqué contre la face inférieure correspondante dudit mandrin, puis les volets 2 et 4 sont repliés autour des arêtes de celui-ci correspondant aux lignes de pliage 6 et 7, de façon à venir s'appliquer contre les faces latérales correspondantes dudit mandrin 19 (voir la figure 1b). Après cela, le volet 5 et la languette 9 sont respectivement rabattus autour des arêtes dudit mandrin correspondant respectivement aux lignes de pliage 8 et 9, pour venir s'appliquer sur la face supérieure dudit mandrin 19, la languette 9 se trouvant sous le volet 5 (voir la figure 1C). Une pression exercée sur le volet 5 permet de plaquer le bord 5.L de celui-ci sur ladite languette, de sorte que, grâce à la ligne d'adhésif 16, le volet 5 et la languette 9 sont solidarisés l'un de l'autre. De plus, les rabats 11.2 et 11.4 sont rabattus autour des arêtes du mandrin 19 correspondant respectivement aux lignes de pliage 13.2 et 13.4, pour venir s'appliquer contre la face latérale correspondante du mandrin 19 (voir également la figure 16).The blank 1 is placed relative to the mandrel 19 so that its flap 3 is applied against the corresponding underside of said mandrel, then the flaps 2 and 4 are folded around the edges of the latter corresponding to the fold lines 6 and 7, so as to be applied against the corresponding lateral faces of said mandrel 19 (see FIG. 1b). After that, the flap 5 and the tongue 9 are respectively folded around the edges of said mandrel corresponding respectively to the fold lines 8 and 9, to come to be applied on the upper face of said mandrel 19, the tongue 9 being located under the flap 5 (see Figure 1C). A pressure exerted on the flap 5 makes it possible to press the edge 5.L thereof on said tongue, so that, thanks to the line of adhesive 16, the flap 5 and the tongue 9 are secured to one of the 'other. In addition, the flaps 11.2 and 11.4 are folded around the edges of the mandrel 19 corresponding respectively to the fold lines 13.2 and 13.4, to come to bear against the corresponding lateral face of the mandrel 19 (see also Figure 16).

Dans cette position, les lignes d'adhésif 17 et 18 sont dirigées vers l'extérieur.In this position, the lines of adhesive 17 and 18 are directed outward.

Enfin, les rabats 11.3 et11.5 sont rabattus autour des arêtes du mandrin 19 correspondant respectivement aux lignes de pliage 13.3 et 13.5 et appliqués contre les rabats 11.2 et 11.4 déjà repliés, de sorte que lesdits rabats 11.2 à 11.5 sont rendus solidaires les uns des autres, grâce aux lignes d'adhésif 17 et 18 (voir la figure 1d). On obtient alors la caisse 20 montrée sur la figure 1d, couchée sur le volet 3 et ouverte du côté des rabats 12.2 à 12.5.Finally, the flaps 11.3 and 11.5 are folded around the edges of the mandrel 19 corresponding respectively to the fold lines 13.3 and 13.5 and applied against the flaps 11.2 and 11.4 already folded, so that said flaps 11.2 to 11.5 are made integral with each other. others, using the adhesive lines 17 and 18 (see Figure 1d). We then obtain the box 20 shown in Figure 1d, lying on the flap 3 and open on the side of the flaps 12.2 to 12.5.

Pour remplir cette caisse 20, on la dégage du mandrin 19 et on peut la redresser pour la faire reposer sur son fond 21 constitué des rabats solidaires 11.2 à 11.5. Après remplissage, la caisse 20 peut être fermée par repliage des rabats 12.2 à 12.5, respectivement autour des lignes de pliage 14.2 à 14.5, puis solidarisation desdits rabats 12.2 à 12.5 entre eux, par exemple par collage.To fill this box 20, it is released from the mandrel 19 and can be straightened to rest on its bottom 21 consisting of integral flaps 11.2 to 11.5. After filling, the box 20 can be closed by folding the flaps 12.2 to 12.5, respectively around the fold lines 14.2 to 14.5, then securing said flaps 12.2 to 12.5 therebetween, for example by gluing.

Sur les figures 2a à 2c, on a illustré schématiquement le processus de positionnement du flan 1 par rapport au mandrin, lorsque l'on désire appliquer le volet 3 contre la face inférieure correspondante du mandrin 19. Sur ces figures, on a supposé que ledit mandrin 19 était constitué de profilés 22 (vus en coupe), parallèles et à sections rectangulaires, définissant des faces d'appui virtuelles 23 à 26, respectivement pour les volets 2 à 5, ainsi que des arêtes de pliage 27 à 30, correspondant respectivement aux lignes de pliage 6,7,8 et 10.In FIGS. 2a to 2c, the process of positioning the blank 1 relative to the mandrel has been illustrated diagrammatically, when it is desired to apply the flap 3 against the corresponding underside of the mandrel 19. In these figures, it has been assumed that said mandrel 19 consisted of profiles 22 (seen in section), parallel and with rectangular sections, defining virtual bearing faces 23 to 26, respectively for the flaps 2 to 5, as well as folding edges 27 to 30, corresponding respectively at fold lines 6,7,8 and 10.

Un flan 1 est amené au voisinage du mandrin 19, de façon que son volet 3 soit disposé en regard de la face d'appui 24. Bien que le positionnement latéral dudit volet 3 par rapport à ladite face 24 soit recherché aussi précis que possible, il peut se produire qu'un décalage latéral l apparaisse entre le volet 3 et ladite face d'appui 24. Pour éviter des pliages intempestifs du flan 1, à l'extérieur des lignes de pliage 6 et 7, lors du rabattement des volets 2 et 4, on fait en sorte que, avant rabattement desdits volets 2 et 4, le volet 3 soit écarté de la face d'appui 24 d'une distance d (voir la figure 2a). Ensuite, pendant le rabattement desdits volets 2 et 4, le volet 3 est rapproché de la face d'appui 24 par l'intermédiaire d'une plaque 31, de préférence exactement superposable à ladite face d'appui 24.A blank 1 is brought in the vicinity of the mandrel 19, so that its flap 3 is disposed opposite the bearing face 24. Although the lateral positioning of said flap 3 relative to said face 24 is sought as precise as possible, it may happen that a lateral offset l appears between the flap 3 and said bearing face 24. To avoid untimely folding of the blank 1, outside the fold lines 6 and 7, when the flaps 2 are folded down and 4, it is arranged that, before the said flaps 2 and 4 are folded down, the flap 3 is spaced from the bearing face 24 by a distance d (see FIG. 2a). Then, during the folding down of said flaps 2 and 4, the flap 3 is brought closer to the bearing face 24 by means of a plate 31, preferably exactly superimposed on said bearing face 24.

Ainsi, pendant le rapprochement du volet 3 de la face 24, les volets 2 et 4 sont en appui contre le mandrin 19 (voir la figure 2b) ce qui engendre un effet de guidage et positionne exactement le volet 3 par rapport à la face d'appui 24. Lorsque la plaque 31 presse le volet 3 entre la face d'appui 24, les lignes de pliage 6 et 7 sont exactement superposées aux arêtes de pliage 27 et 28, de sorte que, après rabattement définitif des volets 2 et 4, respectivement contre les faces d'appui 23 et 25, les lignes de pliage 8 et 10 se trouvent aussi exactement superposées aux arêtes de pliage 29 et 30 (voir la figure 2c).Thus, during the approximation of the flap 3 of the face 24, the flaps 2 and 4 are in abutment against the mandrel 19 (see FIG. 2b) which generates a guiding effect and exactly positions the flap 3 relative to the face d 'support 24. When the plate 31 presses the flap 3 between the support face 24, the fold lines 6 and 7 are exactly superimposed on the fold edges 27 and 28, so that, after final folding of the flaps 2 and 4 , respectively against the bearing faces 23 and 25, the fold lines 8 and 10 are also exactly superimposed on the fold edges 29 and 30 (see FIG. 2c).

La machine, conforme à la présente invention et représentée sur les figures 3 à 8, comporte un bâti 32 par rapport auquel sont disposés un poste 33 d'alimentation en flans 1, un poste 34 de conformation desdits flans autour dudit mandrin 19 et un poste 35 d'évacuation des caisses 20 terminées. Entre le poste d'alimentation 33 et le poste de conformation 34 est disposée une table horizontale 36, pourvue de fentes longitudinales 37 à travers lesquels peuvent passer des doigts d'entraînement 38.The machine, according to the present invention and shown in Figures 3 to 8, comprises a frame 32 with respect to which are arranged a station 33 for supplying blanks 1, a station 34 for shaping said blanks around said mandrel 19 and a station 35 of evacuation of the finished cases 20. Between the feed station 33 and the shaping station 34 is disposed a horizontal table 36, provided with longitudinal slots 37 through which the drive fingers 38 can pass.

Le poste d'alimentation 33 comporte un magasin 39 contenant une pile de flans 1, ainsi que des moyens 40 de prise, par exemple par aspiration, du flan supérieur 1 de ladite pile de flans. Lesdits moyens de prise 40 sont mobiles, sous l'action de moyens moteurs 41, pour pouvoir prélever successivement les flans 1 du magasin 39 et les déposer sur la table 36, en amont du poste de conformation 34. Ensuite, les doigts d'entraînement 38, mus par des moyens moteurs 42, font glisser sur la table 36 le flan 1, ainsi prélevé et déposé pour l'amener sous le mandrin 19 du poste de conformation 34.The feeding station 33 includes a magazine 39 containing a stack of blanks 1, as well as means 40 for taking, for example by suction, the upper blank 1 of said stack of blanks. Said gripping means 40 are movable, under the action of motor means 41, in order to be able to successively take the blanks 1 from the magazine 39 and deposit them on the table 36, upstream of the shaping station 34. Next, the drive fingers 38, moved by motor means 42, slide the blank 1, thus removed, onto the table 36 and deposited to bring it under the mandrel 19 of the shaping station 34.

Pendant le transfert vers le poste de conformation 34, le flan 1 rencontre des encolleurs 43,44 et 45, solidaires du bâti 32, et déposant respectivement les lignes d'adhésif 16,17 et 18.During the transfer to the shaping station 34, the blank 1 encounters glueers 43, 44 and 45, integral with the frame 32, and depositing the lines of adhesive 16, 17 and 18 respectively.

Ainsi, grâce aux doigts d'entraînement 38 et aux encolleurs 43 à 45, le flan 1 est disposé, déjà encollé, sous le mandrin 19 dans la position représentée sur la figure 2a, au-dessus de la plaque de pression 31, mue par un vérin 46.Thus, thanks to the drive fingers 38 and the glueers 43 to 45, the blank 1 is arranged, already glued, under the mandrel 19 in the position shown in FIG. 2a, above the pressure plate 31, moved by a cylinder 46.

Pour replier les volets 2 et 4, le poste de conformation 34 comporte le mécanisme 47, représenté sur les figures 3,4,7 et 8. Ce mécanisme 47 comporte un équipage mobile 48 pouvant être levé ou abaissé par l'intermédiaire d'un vérin 49, prenant appui sur le bâti 32.To fold the flaps 2 and 4, the shaping station 34 includes the mechanism 47, shown in Figures 3,4,7 and 8. This mechanism 47 includes a movable assembly 48 which can be raised or lowered by means of a jack 49, bearing on the frame 32.

L'équipage mobile 48 comporte deux butées 50 et 51, susceptibles de rabattre les volets 2 et 4, respectivement contre les faces d'appui 23 et 25 du mandrin 19 (voir également la figure 2b), lorsque l'équipage mobile 48 est rapproché du mandrin 19.The moving element 48 comprises two stops 50 and 51, capable of folding down the flaps 2 and 4, respectively against the bearing faces 23 and 25 of the mandrel 19 (see also FIG. 2b), when the moving element 48 is brought together of the mandrel 19.

De plus, ledit équipage mobile 48 comporte des bras articulés 52 et 53, pour rabattre respectivement le volet 5 et la languette 9 contre la face 26 du mandrin 19, après rabattement des volets 2 et 4 entre les faces d'appui 23 et 25. Par exemple, le bras 52 est mu par un vérin 54, tandis que le bras 53 est actionné par une tringlerie 55, reliée au bâti 32.In addition, said movable assembly 48 comprises articulated arms 52 and 53, for folding the flap 5 and the tongue 9 respectively against the face 26 of the mandrel 19, after the flaps 2 and 4 are folded down between the bearing faces 23 and 25. For example, the arm 52 is moved by a jack 54, while the arm 53 is actuated by a linkage 55, connected to the frame 32.

A l'intérieur du mandrin 19 est disposée une plaque transversale 56, servant de face d'extrémité audit mandrin 19 et mue par un vérin 57.Inside the mandrel 19 is disposed a transverse plate 56, serving as an end face to said mandrel 19 and driven by a jack 57.

Des actionneurs 58 et 59, tels que des vérins par exemple, peuvent rabattre respectivement les rabats 11.2 et 11.4 contre la plaque 56.Actuators 58 and 59, such as jacks for example, can fold the flaps 11.2 and 11.4 respectively against the plate 56.

Après action des butées 50 et 51, des bras 52 et 53 et des actionneurs 58 et 59, le flan se trouve dans l'état représenté sur la figure 1c.After action of the stops 50 and 51, of the arms 52 and 53 and of the actuators 58 and 59, the blank is in the state shown in FIG. 1c.

A cet instant, afin de parfaire l'équerrage du flan 1 conformé avant collage définitif, on peut exercer sur lui une pression longitudinale, grâce à des vérins 60 le pressant en direction des actionneurs 58 et 59 en prenant appui sur le bord libre des rabats 12.2, 12.4 et 12.5.At this instant, in order to perfect the squaring of the shaped blank 1 before definitive bonding, it is possible to exert a longitudinal pressure on it, by means of jacks 60 pressing it in the direction of the actuators 58 and 59 while bearing on the free edge of the flaps 12.2, 12.4 and 12.5.

Après équerrage, le volet 5 est appliqué contre la face d'appui 26 par un bras 61, basculant sous l'action d'un vérin 69. Le volet 5 est alors solidarisé de la languette 9, par l'intermédiaire de la ligne d'adhésif 16.After squaring, the flap 5 is applied against the bearing face 26 by an arm 61, tilting under the action of a jack 69. The flap 5 is then secured to the tongue 9, via the line d adhesive 16.

Enfin, des vérins 62 et 63, éventuellement par l'intermédiaire de plaques basculantes 64 et 65, appliquent les rabats 11.3 et 11.5 contre les rabats 11.2 et 11.4, antérieurement rabattus contre la plaque 56. On solidarise ainsi lesdits rabats 11.2 à 11.5 grâce aux lignes d'adhésif 17 et 18, en formant le fond 21. La caisse se présente alors comme cela est représenté sur la figure 1d.Finally, jacks 62 and 63, optionally by means of tilting plates 64 and 65, apply the flaps 11.3 and 11.5 against the flaps 11.2 and 11.4, previously folded against the plate 56. Said flaps 11.2 to 11.5 are thus secured by means of the lines of adhesive 17 and 18, forming the bottom 21. The box then appears as shown in Figure 1d.

Le poste d'évacuation 35 comporte deux convoyeurs 67 et 68 en escalier, de sorte que lorsque la caisse 20 est éjectée du mandrin par action du vérin 57, celle-ci bascule en passant du convoyeur 67 au convoyeur 68 et est évacuée par celui-ci, sur lequel elle repose par son fond 21.The evacuation station 35 comprises two conveyors 67 and 68 in steps, so that when the box 20 is ejected from the mandrel by the action of the jack 57, the latter rocks passing from the conveyor 67 to the conveyor 68 and is evacuated by the latter. ci, on which it rests by its bottom 21.

Une armoire 70 contient les moyens de commande et de synchronisme des différents organes de la machine décrite ci-dessus.A cabinet 70 contains the means for controlling and synchronizing the various components of the machine described above.

Claims (11)

  1. Method for the production of a box having a polygonal cross-section from a blank (1) of sheet material being composed of a set of panels (2, 3, 4, 5) connected together by parallel lines of folding (6, 7, 8) and provided with lateral flaps (11.2 to 11.5 and 12.2 to 12.5) which are respectively connected to the said panels (2 to 5) by lines of folding (13.2 to 13.5 and 14.2 to 14.5) perpendicular to the lines of folding (6, 7, 8) connecting the said panels and which are intended to form respectively the bottom and the lid of the said box, the free edge of one (2) of the outermost panels of the said set of panels (2 to 5) being provided with a tab (9) connected to the said outermost panel (2) by a line of folding (10) parallel to the lines of folding (6 to 8) connecting the said panels, according to which method the said set of panels (2 to 5) is wrapped around a mandrel (19) having a polygonal cross-section, so that each of the said panels is applied against one face of the said mandrel and in that the said lines of folding (6 to 8) connecting the said panels bear against a corresponding intersecting edge of the said mandrel (19), after which:
    - the said tab (9) is fixed to the free edge (5.L) of the other (5) of the said outermost panels of the said set of panels (2 to 5);
    - the flaps (11.2 to 11.5) located on a same side of the said panel (2 to 5) are folded over against a corresponding face of the said mandrel about the corresponding lines of folding (13.2 to 13.5); and
    - the said flaps (11.2 to 11.5) thus folded over are fixed to each other;
    characterised in that
    - before wrapping the said set of panels around the said mandrel (19), the external cross-section of which corresponds to the internal cross-section of the said box to be obtained, an intermediate panel (3) which can be moved freely and forms a part of the said set of panels is placed, at least approximately opposite the corresponding face (24) of the said immovable mandrel but at some distance (d) from the latter, then the panels (2, 4) adjacent to the said intermediate panel (3) are folded over, moving the said intermediate panel (3) closer towards the said corresponding face (24) of the said mandrel, so that, while the said intermediate panel (3) is moved closer to the said corresponding face (24) of the mandrel, the said panels (2, 4) adjacent to the said intermediate panel (3) come to bear against the mandrel (19), which generates a translational movement of the said intermediate panel (3) with respect to the said corresponding face (24) of the mandrel and exactly positions the intermediate panel (3) and the lines of folding of the said intermediate panel with respect to the said corresponding face (24) of the mandrel.
  2. Method according to Claim 1, characterised in that the said mandrel (19) is disposed at a stationary unit and in that the said blank (1) is brought to the said mandrel by a translational movement in a direction parallel to the said lines of folding (6, 7, 8) connecting the said panels (2 to 5).
  3. Method according to either of Claims 1 or 2, characterised in that, while the said set of panels (2 to 5) is wrapped around the mandrel (19) and the said flaps (11.2 to 11.5) are folded over the latter, at least one (3) of the said panels (2 to 5) is horizontal.
  4. Method according to one of Claims 1 to 3, characterised in that the fixing of the said tab (9) to the free edge (5.L) of the said other outermost panel (5) and/or the fixing of the said flaps (11.2 to 11.5) to one another is carried out by gluing.
  5. Method according to any one of Claims 1 to 4, characterised in that the face of the mandrel (19), against which the said flaps (11.2 to 11.5) are folded over, is caused to move.
  6. Machine for the production of a box having a polygonal cross-section from a blank (1) of sheet material being composed of a set of panels (2, 3, 4, 5) connected together by parallel lines of folding (6, 7, 8) and provided with lateral flaps (11.2 to 11.5 and 12.2 to 12.5) which are respectively connected to the said panels (2 to 5) by lines of folding (13.2 to 13.5 and 14.2 to 14.5) perpendicular to the lines of folding (6, 7, 8) connecting the said panels and which are intended to form respectively the bottom and the lid of the said box, the free edge of one (2) of the outermost panels of the said set of panels (2 to 5) being provided with a tab (9) connected to the said outermost panel (2) by a line of folding (10) parallel to the lines of folding (6 to 8) connecting the said panels, which machine is composed of:
    - a mandrel (19) having a polygonal cross-section, the external cross-section of which corresponds to the internal cross-section of the said box to be obtained;
    - means (47 to 55) for wrapping the said set of panels (2 to 5) around the said mandrel (19);
    - means (53, 61, 69) for fixing the said tab (9) to the free edge of the other (5) of the said outermost panels of the said set of panels (2 to 5);
    - means (58, 59, 62, 63, 64) for folding over the flaps (11.2 to 11.5) located on a same side of the said panels (2 to 5) against a corresponding face (56) of the said mandrel; and
    - means (44, 45) for fixing the said flaps (11.2 to 11.5) thus folded over to each other;
    characterised:
    - in that it is composed of a support (31) which can move between a first position, in which it freely supports an intermediate panel (3) of the said set of panels at least approximately opposite the corresponding face (24) of the said immovable mandrel, but at some distance from the latter and a second position, in which the said support (31) presses the said intermediate panel (3) against the said corresponding face (24) of the said mandrel (19); and
    - in that it is composed of means for moving the said support (31) between these two positions, the movement of the said support being performed while the panels (2, 4) adjacent to the said intermediate panel (3) are folded over.
  7. Machine according to Claim 6, characterised in that it is composed of a horizontal table (36) disposed under the said mandrel (19) and means (38) for bringing the said blank under the said mandrel (19) by sliding on the said table.
  8. Machine according to either one of Claims 6 or 7, characterised in that it is composed of means (43 to 45) for locally gluing the said blank after it is brought under the said mandrel (19).
  9. Machine according to one of Claims 6 to 8, characterised in that it is composed of means (67) for setting the said box (20) vertically upright.
  10. Machine according to one of Claims 6 to 9, characterised in that it is composed of means (56, 57) for ejecting the box (20) from the mandrel (19), which means are at least partially constituted by the said face (56) of the mandrel against which the said flaps (11.2 to 11.5) are folded over.
  11. Machine according to one of Claims 6 to 10, characterised in that the said means for wrapping the said set of flaps (2 to 5) around the mandrel (19) are composed of a movable element (47) comprising fixed stops (50, 51) and swinging arms (52, 53).
EP89400662A 1988-03-22 1989-03-09 Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby Expired - Lifetime EP0334707B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400662T ATE91662T1 (en) 1988-03-22 1989-03-09 METHOD AND MACHINE FOR MANUFACTURE OF POLYGONAL BOXES FROM SHEET MATERIAL AND BOX MADE THEREOF.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8803719A FR2629012B1 (en) 1988-03-22 1988-03-22 PROCESS AND MACHINE FOR MAKING POLYGONAL SECTION CRATES IN SHEET MATERIAL AND CRATES THUS OBTAINED
FR8803719 1988-03-22

Publications (2)

Publication Number Publication Date
EP0334707A1 EP0334707A1 (en) 1989-09-27
EP0334707B1 true EP0334707B1 (en) 1993-07-21

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EP89400662A Expired - Lifetime EP0334707B1 (en) 1988-03-22 1989-03-09 Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby

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US (1) US4932930A (en)
EP (1) EP0334707B1 (en)
JP (1) JP2529731B2 (en)
KR (1) KR960010447B1 (en)
AT (1) ATE91662T1 (en)
AU (1) AU604411B2 (en)
CA (1) CA1326153C (en)
DE (2) DE334707T1 (en)
DK (1) DK172144B1 (en)
ES (1) ES2044155T3 (en)
FI (1) FI87903C (en)
FR (1) FR2629012B1 (en)
HU (1) HU205730B (en)
IE (1) IE64249B1 (en)
IL (1) IL89470A0 (en)
NO (1) NO175890C (en)
NZ (1) NZ228204A (en)
OA (1) OA08989A (en)
PT (1) PT90073B (en)

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Publication number Publication date
ES2044155T3 (en) 1994-01-01
AU3114589A (en) 1989-09-28
NO175890C (en) 1994-12-28
PT90073A (en) 1989-11-10
NO175890B (en) 1994-09-19
CA1326153C (en) 1994-01-18
DE68907622T2 (en) 1993-12-09
DK172144B1 (en) 1997-11-24
FI891323A (en) 1989-09-23
IE890635L (en) 1989-09-22
FR2629012A1 (en) 1989-09-29
DE68907622D1 (en) 1993-08-26
HUT54561A (en) 1991-03-28
EP0334707A1 (en) 1989-09-27
ATE91662T1 (en) 1993-08-15
DK100489D0 (en) 1989-03-02
AU604411B2 (en) 1990-12-13
NO891246L (en) 1989-09-25
JP2529731B2 (en) 1996-09-04
IL89470A0 (en) 1989-09-10
NZ228204A (en) 1990-12-21
KR960010447B1 (en) 1996-08-01
FI87903C (en) 1993-03-10
FI891323A0 (en) 1989-03-21
HU205730B (en) 1992-06-29
OA08989A (en) 1990-11-30
JPH0222043A (en) 1990-01-24
KR890014253A (en) 1989-10-23
US4932930A (en) 1990-06-12
NO891246D0 (en) 1989-03-21
FR2629012B1 (en) 1994-01-14
DE334707T1 (en) 1993-04-08
IE64249B1 (en) 1995-07-26
DK100489A (en) 1989-09-23
PT90073B (en) 1994-03-31
FI87903B (en) 1992-11-30

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