EP0426188B1 - Procédé et dispositif pour la fabrication des charnières en matériau plat de carton - Google Patents

Procédé et dispositif pour la fabrication des charnières en matériau plat de carton Download PDF

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Publication number
EP0426188B1
EP0426188B1 EP90120988A EP90120988A EP0426188B1 EP 0426188 B1 EP0426188 B1 EP 0426188B1 EP 90120988 A EP90120988 A EP 90120988A EP 90120988 A EP90120988 A EP 90120988A EP 0426188 B1 EP0426188 B1 EP 0426188B1
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EP
European Patent Office
Prior art keywords
flat material
upsetting
bending
clamping
another
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90120988A
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German (de)
English (en)
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EP0426188A1 (fr
Inventor
Gerhard Sixt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOUIS LEITZ KG
Original Assignee
Louis Leitz KG
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Filing date
Publication date
Application filed by Louis Leitz KG filed Critical Louis Leitz KG
Publication of EP0426188A1 publication Critical patent/EP0426188A1/fr
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Publication of EP0426188B1 publication Critical patent/EP0426188B1/fr
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    • 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
    • B31B50/25—Surface scoring
    • B31B50/252—Surface scoring using presses or dies

Definitions

  • the invention relates to a method and a device for producing hinged hinges on the one side and bulges on the other side in flat material made of cardboard, optionally covered with plastic film, paper, textile tape and / or leather.
  • Articulated hinges of this type are required above all on file covers, book covers, cardboard boxes with hinged cover closures and the like.
  • the cardboard used for the production of the flat material consists of several paper layers which are connected to one another in a combined fiber and adhesive bond and which can be finished on their surface with a plastic, paper, textile and / or leather lamination.
  • the flat material is compressed on the groove side by a compression edge which is immersed in the flat material and at the same time is folded to form the groove and on the bead side on two sides at the same distance on both sides of the compression edge by one bending edge parallel to the compression edge in the opposite direction to the fold is deformed to form outer bead edges, the mutual distance between the bending edges being reduced during the immersion of the upsetting edge.
  • that which protrudes laterally beyond the upsetting edge becomes Flat material is pressed by the bending edges, which can be displaced relative to the upsetting edge, against abutment surfaces arranged laterally next to the upsetting edge.
  • the abutment surfaces are aligned obliquely to one another, including an obtuse angle, and serve as inclined planes on which the bending edges are displaced in the course of the displacement movement while reducing their mutual distance from the compression edge.
  • the flat material gripped by the sharp bending edges is displaced relative to the abutment surfaces while overcoming a frictional force.
  • surface expansion, surface damage and tension within the flat material can occur.
  • the internal tensions in turn have an influence on the restoring force in the area of the hinge, which can lead to an undesired automatic opening in the hinge area, for example to the automatic opening of folder covers.
  • the invention has for its object a method and to develop a device for producing articulated hinges in the cardboard box of the type specified at the outset, with which a smooth-running hinge with only low restoring forces is generated, surface damage in the hinge area can be avoided and a disruptive folding up of the protruding flat material parts during the upsetting process can be prevented.
  • the solution according to the invention is based on the idea that a sliding movement between the flat material and the pressing tools must be avoided during the upsetting process in order to ensure tension-free loosening of the fiber composite and trouble-free surface handling in the hinge area.
  • this is achieved in that the flat material parts protruding over the bead outer edges are clamped independently of one another at clamping points arranged in the vicinity of the adjacent bending edges and are moved towards one another in flush alignment when the compression edge is immersed in the flat material, the clamping points at the beginning of the immersion process coincide with the bending edge and are moved outward in the course of the reduction in the distance between the bending edges without sliding friction on the flat material parts protruding beyond the outer edge of the bead.
  • This procedure has the additional advantage that the protruding flat material parts do not have to be pivoted against one another in the course of the upsetting process.
  • the distance between the clamping points can be approximately during the reduction in the distance of the bending edges stay the same.
  • the latter is made possible by the fact that the clamping points are formed by the contact lines in each case of two spherical, for example partially cylindrical, clamping surfaces rolling off one another with intermediate clamping of the flat material.
  • the flat material is clamped flat over a certain width due to its flexibility at the clamping points.
  • the change in distance between the bending edges is positively controlled as a function of their relative displacement position to the compression edge. This makes it possible to optimize the sequence of movements of the bending edges relative to the upsetting edge in such a way that the carton is drawn in largely without tension during the upsetting process.
  • a preferred device for carrying out the method according to the invention has two tools which act from opposite sides against the flat material and are displaceable relative to one another, preferably designed as upper and lower tools.
  • the first of these tools contains a centrally arranged elongated compression tongue which forms a compression and fold edge, and two contact surfaces which are arranged next to the compression tongue for the flat material parts projecting laterally on the joint hinges to be produced.
  • the second tool is provided with two elongated bending jaws, which are offset on both sides of the upsetting tongue and each have a bending edge that is parallel to the upsetting and folding edge can be moved towards one another in the course of the relative displacement movement of the tools in the direction of the compression tongue.
  • the solution according to the invention in such a device is that the bending jaws of the second tool are provided with clamping surfaces, which can be pressed against the contact surfaces of the first molding tool in an aligned alignment with intermediate clamps of the protruding flat material parts, so that the parts carrying the clamping and contact surfaces are used for Execution of a synchronous transverse movement can be coupled to one another in pairs and are pivotably connected to the respective tools about pivot axes parallel to the upsetting and bending edges, while the clamping and contact surfaces have a spherical, preferably partially cylindrical, rolling shape in pairs with intermediate clamps of the flat material.
  • the contact surfaces of the first tool are arranged on pressure pieces which, under the action of the bending jaws striking with its clamping surfaces, can be displaced relative to the compression tongue against the force of a spring.
  • the contact and clamping surfaces are advantageously in the area of their clamping points which bear against the protruding flat material parts arranged in a common, preferably horizontally oriented tangent plane.
  • the pressure pieces can be articulated on a spring base that can be displaced relative to the compression tongue against the force of a spring.
  • the bending jaws and / or the pressure pieces which can be coupled with these can be pivoted in pairs against one another about their pivot axes against the force of a spring, each defining the opening width of the bending edges when they strike the flat material, preferably adjustable.
  • the pivot axes of the bending jaws and pressure pieces pressed in pairs with respect to the compression tongue are arranged outside the clamping points of their clamping and contact surfaces lying against one another with intermediate clamping of the flat material, then in the course of the compression process the bending jaws and pressure pieces will be in Torque directed towards the upset tongue about its swivel axes, which triggers the desired transverse movement.
  • the bending jaws are positively guided to the side of the compression tongue along a curve that defines the transverse movement as a function of the displacement path.
  • the bending jaws can be articulated on a tappet forming the upper tool, while the curve is arranged in a fixed manner relative to the tappet.
  • the upsetting device shown in the drawing is intended for the production of hinge hinges 10 in flat material 12, which are groove-shaped on one side, from cardboard, optionally laminated with plastic, paper, textile tape or leather.
  • the upsetting device essentially comprises a lower tool 18 provided with a machine-fixed, elongated compression tongue 14 and two elongated pressure pieces 16 arranged laterally next to the compression tongue 14 and an upper tool 22 arranged above the lower tool 18 and displaceable against the lower tool and provided with bending jaws 20 pointing downwards.
  • the pressure pieces 16 are articulated on a spring base 28 which can be pressed against the force of springs 24 relative to the machine frame 26 and the compression tongue 14 under the action of the descending upper tool 22, about axes 30 parallel to the longitudinal extension of the compression tongue 14.
  • a pressure spring 32 acts between the pressure pieces 16 and holds the pressure pieces outward against adjustable stops 34 in the open position.
  • the bending jaws 20 are arranged on an up and down movable plunger 36 so as to be pivotable about axes 38 parallel to the axes 30. In their open position shown in FIG. 1, they are held against adjustable stops 42 under the action of a compression spring 40. The stops 42 define the opening width of the bending jaws 20 when their bending edges 44 strike the flat material 12 lying on the lower tool 18 in the region of the contact surfaces 46 and the compression edge 48 at the beginning of the upsetting process.
  • the bending jaws 20 and the pressure pieces 16 become locked by means of schematically illustrated locking members 50 in pairs so that they carry out a sliding friction-free coupled transverse movement about their axes 30, 38 with sandwiched flat material 12.
  • the clamping surface 52 of the bending jaws 20 pressing against the top of the flat material 12 and the contact surfaces 46 of the pressure pieces 16 pressing against the underside of the flat material 12 are spherical, preferably partially cylindrical.
  • the pressure pieces are displaced downwards by clamping the flat material 12 by moving the spring base 28 against the force of the springs 24 in such a way that the compression tongue 14 with its compression edge 48 dips into the flat material 12 from below forming a groove.
  • the one available for grooving Material is limited by the opening dimension between the bending edges 44 of the bending jaws 20 when it hits the flat material 12.
  • the flat material parts 12 'protruding laterally beyond the bending edges 44 are held in a horizontal orientation between the clamping and contact surfaces 52, 46 which lie against one another in pairs.

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  • Making Paper Articles (AREA)

Claims (13)

  1. Procédé pour la fabrication de charnières en forme de gorge d'un côté et en forme de bourrelet de l'autre côté, réalisées dans un matériau plat de carton éventuellement revêtu d'une feuille de matière plastique, de papier, de bande textile et/ou de cuir, par lequel le matériau plat est refoulé du côté gorge par une arête de refoulement plongeant dans ledit matériau plat, et en même temps plié avec formation de la gorge et déformé par flexion, du côté bourrelet, sur deux arêtes de pliage situées à égale distance de part et d'autre de l'arête de refoulement, respectivement autour d'une arête de pliage parallèle à l'arête de refoulement, dans la direction opposée au pli, avec formation des bords extérieurs de bourrelet, la distance entre les arêtes de pliage étant réduite pendant la plongée de l'arête de refoulement dans le matériau plat, caractérisé en ce que les parties de matériau plat (12') qui dépassent latéralement des bords extérieurs du bourrelet sont enserrées indépendamment l'une de l'autre à des points de serrage situés à proximité des arêtes de pliage (44) voisines et déplacées de manière alignée l'une vers l'autre au moment de la plongée de l'arête de refoulement (48) dans le matériau plat (12), et que les points de serrage coïncident au début de la plongée avec l'arête de pliage (44) et se déplacent, au cours de la réduction de la distance entre les arêtes de pliage, sans friction de glissement, vers l'extérieur sur les parties de matériau plat (12') qui dépassent des bords extérieurs du bourrelet.
  2. Procédé selon la revendication 1, caractérisé en ce que la distance entre les points de serrage reste sensiblement constante pendant la réduction de l'écartement des arêtes de pliage (44).
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que les points de serrage sont formés par les lignes de contact de respectivement deux surfaces de serrage (46, 52) bombées, de préférence partiellement cylindriques, qui roulent l'une sur l'autre avec interposition du matériau plat (12).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le matériau plat (12) est enserré à plat aux points de serrage.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la variation de la distance entre les arêtes de pliage (44) est commandée automatiquement en fonction de leur position de translation relative par rapport à l'arête de refoulement (48).
  6. Dispositif pour la fabrication de charnières en forme de gorge d'un côté et en forme de bourrelet de l'autre côté, réalisées dans un matériau plat de carton éventuellement revêtu d'une feuille de matière plastique, de papier, de bande textile et/ou de cuir, comprenant deux outils (18, 22) qui agissent à partir de deux côtés opposés sur le matériau plat (12), peuvent être déplacés l'un par rapport à l'autre et sont conformés de préférence en outils supérieur et inférieur, dont le premier outil (18) comporte une languette de refoulement (14) allongée disposée au milieu et formant une arête de refoulement et de pliage (48), ainsi que deux surfaces d'appui (46) placées à côté de la languette de refoulement (14), pour les parties de matériau plat (12') qui dépassent latéralement des charnières (10) à réaliser, et dont le second outil (22) est équipé de deux mâchoires de pliage (20) allongées décalées de part et d'autre par rapport à la languette de refoulement (14) et présentant à chaque fois une arête de pliage (44) parallèle à l'arête de refoulement et de pliage (48), les mâchoires de pliage pouvant être déplacées, pendant le mouvement de translation relatif des outils (18, 22), l'une vers l'autre en direction de la languette de refoulement (14), caractérisé en ce que les mâchoires de pliage (20) du second outil (22) sont munies de surfaces de serrage (52) qui, avec interposition des parties de matériau plat (12') en saillie, peuvent être pressées de manière alignée contre les surfaces d'appui (46) du premier outil (18), que les éléments (20, 16) portant les surfaces de serrage et d'appui (52, 46) peuvent être couplés par paires les uns avec les autres pour effectuer un mouvement transversal synchronisé et qu'ils sont articulés sur les outils respectifs (18, 22) de manière à pouvoir tourner autour d'axes de pivotement (30, 38) orientés parallèlement aux arêtes de refoulement et de pliage (48, 44), et que les surfaces de serrage et d'appui (52, 46) présentent une forme bombée, de préférence partiellement cylindrique, de manière à rouler par paires les unes sur les autres, avec interposition du matériau plat.
  7. Dispositif selon la revendication 6, caractérisé en ce que les surfaces d'appui (46) du premier outil (18) sont disposées sur des membres de pression (16) qui, sous l'action des mâchoires de pliage (20) en butée avec ses surfaces de butée (52), peuvent être déplacés par rapport à la languette de refoulement (14) contre la force d'un ressort (24).
  8. Dispositif selon l'une des revendications 6 ou 7, caractérisé en ce que les surfaces d'appui et de serrage (46, 52) sont disposées, dans la région de leurs points de serrage appliqués contre les parties de matériau plat (12') en saillie, dans un plan tangentiel commun, de préférence orienté horizontalement.
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que les membres de pression sont articulés sur un fond à ressort (28) déplaçable par rapport à la languette de refoulement (14) contre la force d'un ressort (24).
  10. Dispositif selon l'une des revendications 6 à 9, caractérisé en ce que les mâchoires de pliage (20) et/ou les membres de pression (16) pouvant être couplés avec celles-ci peuvent tourner par paires les uns vers les autres autour de leurs axes de pivotement (38, 30), contre la force d'un ressort (40, 32), entre respectivement une butée (42 et respectivement 34), de préférence réglable, qui définit la largeur d'ouverture des arêtes de pliage (44) lors de l'entrée en contact avec le matériau plat (12).
  11. Dispositif selon l'une des revendications 6 à 10, caractérisé en ce que les axes de pivotement (30, 38) des mâchoires de pliage (20) et des membres de pression (16) pressés par paires les uns contre les autres sont disposés, par rapport à la languette de refoulement (14), à l'extérieur des points de serrage de leurs surfaces de serrage et d'appui (46, 52) appliquées les unes contre les autres, avec interposition du matériau plat (12).
  12. Dispositif selon l'une des revendications 6 à 11, caractérisé en ce que les mâchoires de pliage (20) sont guidées vers le côté de la languette de refoulement (14) le long d'une came (54) qui définit le mouvement transversal en fonction du parcours de translation.
  13. Dispositif selon l'une des revendications 6 à 12, caractérisé en ce que les mâchoires de pliage (20) sont articulées sur un coulisseau (36) qui forme l'outil supérieur (22).
EP90120988A 1989-11-02 1990-11-02 Procédé et dispositif pour la fabrication des charnières en matériau plat de carton Expired - Lifetime EP0426188B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936393 1989-11-02
DE3936393 1989-11-02

Publications (2)

Publication Number Publication Date
EP0426188A1 EP0426188A1 (fr) 1991-05-08
EP0426188B1 true EP0426188B1 (fr) 1994-03-23

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ID=6392673

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EP90120988A Expired - Lifetime EP0426188B1 (fr) 1989-11-02 1990-11-02 Procédé et dispositif pour la fabrication des charnières en matériau plat de carton

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EP (1) EP0426188B1 (fr)
DE (2) DE4034865A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9414170D0 (en) * 1994-07-13 1994-08-31 Aston Packaging Ltd Hinged clip and fitted article

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE115638C (fr) *
FR799742A (fr) * 1935-12-05 1936-06-18 Zent S A Berne Machine pour la fabrication en une seule opération de tôles ondulées destinées à être soudées ensemble pour former des radiateurs
US2524584A (en) * 1949-10-18 1950-10-03 Shellmar Products Corp Method of forming containers
FR1218481A (fr) * 1958-12-01 1960-05-11 Achard Machine à plisser les tôles
FR1252082A (fr) * 1959-10-16 1961-01-27 Merlin Gerin Machine plieuse
FR1263363A (fr) * 1960-04-26 1961-06-09 Merlin Gerin Machine à plisser les tôles en bande continue
FR1259214A (fr) * 1960-06-07 1961-04-21 Aluminium Roofing Proprietary Procédé et dispositif pour plier et faconner des feuilles
FR1294242A (fr) * 1961-04-12 1962-05-26 Comp Generale Electricite Machine à plisser les tôles de calandres
US3461711A (en) * 1964-09-08 1969-08-19 Frank R Ogilvie Corrugating method and apparatus
US3479855A (en) * 1967-07-19 1969-11-25 Frank R Ogilvie Corrugating machine
SE369870B (fr) * 1972-12-21 1974-09-23 Sprinter Pack Ab

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Publication number Publication date
EP0426188A1 (fr) 1991-05-08
DE59005092D1 (de) 1994-04-28
DE4034865A1 (de) 1991-05-08

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