EP0576332A1 - Crimp head for food tins comprising tolerance regulating means - Google Patents

Crimp head for food tins comprising tolerance regulating means Download PDF

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Publication number
EP0576332A1
EP0576332A1 EP93401560A EP93401560A EP0576332A1 EP 0576332 A1 EP0576332 A1 EP 0576332A1 EP 93401560 A EP93401560 A EP 93401560A EP 93401560 A EP93401560 A EP 93401560A EP 0576332 A1 EP0576332 A1 EP 0576332A1
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EP
European Patent Office
Prior art keywords
roller
axis
cam
rollers
cam follower
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Granted
Application number
EP93401560A
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German (de)
French (fr)
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EP0576332B1 (en
Inventor
Jean-Charles Marchadour
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Hema Technologies SA
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Hema Technologies SA
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Publication of EP0576332A1 publication Critical patent/EP0576332A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/285—Securing closures on containers by deformation of the closure
    • B65B7/2857—Securing closures on containers by deformation of the closure and the container rim
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/30—Folding the circumferential seam
    • B21D51/32—Folding the circumferential seam by rolling

Definitions

  • the present invention relates to a crimping head intended to seal the cans by sealing the lid on the can body, comprising at least one crimping wheel mounted on a movable support part which rotates it, in a plane parallel to the work surface on which the crimping box rests, following a path such that it moves exactly along the outline of the box while remaining pressed against it in order to crimp the edge of the cover onto the edge of the box body; the wheel is required, via said support piece, to follow this path thanks to guide means associated with the latter, which comprise a rotary roller of axis perpendicular to said work plane and linked to said support piece, and a cam surface cylindrical, the generators of which, also perpendicular to the work plane, follow one another along an appropriate path extending parallel to the work plane, the roller rolling against the cam surface under the action of means which keep it in contact with the latter .
  • guide means associated with the latter which comprise a rotary roller of axis perpendicular to said work plane and linked to said support piece
  • crimping heads of this kind used in particular for crimping cans with non-circular contours, called "shaped cans"
  • the guide roller associated with each crimping wheel is kept in contact with the surface of cam by a spring. If the operation using such return springs is satisfactory when the crimping head works at a reduced rate, it is not the same when the rate is substantially increased. The inertia effects then become important and cause untimely detachments of the guide rollers.
  • the springs subjected to violent and high frequency stresses, must be replaced periodically.
  • the present invention aims to remedy these drawbacks.
  • the aforementioned return springs are replaced, for each roller, by means for holding said roller in contact with the cam surface, comprising on the one hand a second rotary roller, juxtaposed with this first roller and rotating around the same axis, the second roller offering a curved peripheral surface, its section by a radial plane being a curved line of convexity turned towards the outside, and on the other hand, situated opposite the abovementioned cam surface, a cam follower surface constituting for the second roller a bearing and rolling surface which short parallel to the cam surface, however offering a slight inclination relative to the direction of the common axis of the two rollers; the relative position, along the direction of this axis, of the second roller and the cam follower surface is adjustable in order to allow adjustment of the clearance between the assembly of the two rollers and the cam and cam follower surfaces between which this set is interposed.
  • Such an arrangement provides positive support, without any elastic return member, of the first roller against the cam surface, the two rollers combining their effects to take up the significant radial forces to which the wheel is subjected, while the play can be eliminated by adjustment of the position, in axial direction, of the second roller relative to the cam follower surface. Consequently, the means for guiding each crimping wheel as a function of the layout of the cam surface impose no limit on the working rate of the crimping head, the inertia and wear effects linked to the springs of reminder having disappeared.
  • the second roller has a diameter smaller than that of the first roller and the cam surface has a transverse dimension covering the combined thickness of the two juxtaposed rollers, while the cam follower surface has a transverse dimension lesser, such that it extends only opposite the second roller.
  • the cam and cam follower surfaces are formed by the sides of a groove hollowed out in a plate according to an appropriate layout and with a constant cross section, the second roller being adjacent to the bottom of this groove.
  • the distance between the cam follower surface and the work plane is constant, and the clearance is adjusted by displacement of the second roller, at least, in the direction of its axis relative to said plane.
  • the mutual difference of the two rollers in the direction of their common axis is constant. This means in particular that, when the adjustment is made by axial displacement of the second roller, it is in fact the two rollers which are moved together. Such an arrangement has no effect on the precision of the guidance, since the cam surface is a cylindrical surface of generatrices parallel to said axis.
  • the two rollers are mounted coaxially around the same journal on which they are fixed in the axial direction, and this journal is subject to the support part of the wheel by fixing means allowing the adjustment of its position relative to said plane in the direction of the common axis of the two rollers.
  • the pin may have a threaded end which is screwed into a threaded cavity formed in said support piece in the direction of the common axis of the two rollers, this cavity being opened by a radial slot so that it is located produced between two elastically deformable fork legs, which can be tightened or loosened mutually to block the trunnion between them on the support part or allow its position to be adjusted by progressive screwing or unscrewing.
  • Figure 1 illustrates the kinematics of a crimping head for shaped boxes.
  • Figure 2 shows schematically, in axial section, the main elements associated with a wheel in a crimping head according to the invention.
  • Each wheel 3 is carried by a part 4 comprising a hub 4a pivoting about a vertical axis Y, and two arms 4b, 4c secured to the hub 4a.
  • the thumbwheel is mounted at the end of one of these arms, designated by the reference 4b, to which its axis of rotation V is linked.
  • the pivot axis Y of the hub 4a is required to rotate around the axis X from the crimping head, remaining at a constant distance R from this axis.
  • a roller 10 At the end of the other arm 4c of the support piece 4 is mounted a roller 10 whose axis of rotation Z, vertical, is linked to this arm.
  • the roller 10 is forced to roll against a cam surface 7a whose layout is such that it imposes on the wheel 3, via the part 4 while the hub 4a thereof performs its movement of revolution around the axis X, strictly follow the outline of box 1 to be crimped.
  • This result is illustrated in FIG. 1, where two positions D, D 'of the part 4 and its accessories have been indicated, which, in position D', are designated by the same references as in position D, but assorted of the sign ['].
  • FIG. 1 shows that the hub 4a is mounted between the branches 5a, 5b of a part 5 further comprising a rotary sleeve 5c centered on the axis X, which can rotate around this axis but not move along that -this.
  • the hub 4a can rotate around the axis X, its own axis Y remaining at a constant distance R from the latter, while maintaining a constant spacing with the plane P, that is to say by describing a circle of axis X parallel to the plane P and distant from it by a fixed fixed quantity.
  • the wheel 3 is forced to move while remaining at a constant height above the plane P.
  • the head 4d of the arm 4c located at the end of the latter remote from the hub 4a, which moves while remaining in a mean plane Q parallel to the plane P and located at a fixed fixed distance H from this plane.
  • the head 4d of the arm 4c is equipped with a guide assembly 6 including the aforementioned roller 10, which compels the latter to follow, when the hub 4a rotates around the axis X, the cam surface 7a, produced in a fixed plate 8 known as a "reproduction cam", located at a determined distance J above the plane Q.
  • This surface is a cylindrical surface whose vertical generatrices rest on a line such that the axis Z of the roller 10 follows a trace G designed so that the axis V of wheel 3 moves accordingly along a path T "reproducing", taking into account the radius of the wheel, the outline of box 1.
  • the guide assembly 6 comprises a pin 9 fixed to the head 4d and offering a general shape of revolution around a vertical axis Z; this journal carries, in addition to the roller 10, a second rotating roller 11; these two rollers are mounted one above the other so that they can rotate around the same axis coinciding with the aforementioned Z axis.
  • the lower roller 10, of slightly larger diameter than the upper roller 11, has a cylindrical outer surface of revolution of axis Z and rolls against the cam surface 7a.
  • the upper roller 11 for its part has an outer surface of revolution not cylindrical, but curved, its section through a radial plane, passing through the axis Z, being constituted by an arc slightly convex towards the outside.
  • This roller cooperates with a cam follower surface 7b, produced in the plate 8 facing the cam surface 7a.
  • the surface 7b extends, like the surface 7a, following a path parallel to the line G along which the Z axis must move. It is also a regulated surface, including the generators, instead of being parallel to the Z and X axes , make with them a small angle F of a few degrees.
  • the distance between the cam 7a and cam follower 7b surfaces which form the sides of a groove 7 hollowed out in the plate 8, decreases as one moves away from the head 4d of the piece 4. As for the roller 11, it is adjacent to the bottom 7c of this groove.
  • the cam follower surface 7b does not continue, in the direction of the head 4d, beyond the roller 11, so as not to interfere with the roller 10, of larger diameter, interposed between it ci and said head.
  • the pin 9 is fixed to the head 4d by a threaded part 9a of axis Z which it comprises, which is screwed into a threaded conjugate passage which comprises the head 4d.
  • a threaded part 9a of axis Z which it comprises, which is screwed into a threaded conjugate passage which comprises the head 4d.
  • the convex roller 11 slides along a generatrix of the cam follower surface 7b inclined by the angle F relative to the axis X; it follows that, when one increases, by adjusting the position of the part 9 on the axis Z, the distance K of the roller 11 to the fixed plane Q where the head 4d moves, the clearance which existed between the surfaces 7a, 7b and the rollers 10, 11 of the guide assembly 6 decreases until it cancels, the two rollers 10, 11 then simultaneously pressing each against the surface 7a, 7b with which it cooperates, the roller 10 being in linear contact with the surface 7a and the roller 11 in point contact with the surface 7b.
  • the pin 9 When this setting is reached, the pin 9 is blocked in the head 4d by clamping its threaded part in the threaded passage of the head 4d, the latter being for this purpose open by a slot 13; a screw is engaged in holes 12 drilled in the two corresponding branches, separated by this slot, for tighten elastically these against the threaded part 9a of the pin 9 and lock the latter by pinching.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Pinball Game Machines (AREA)
  • Tyre Moulding (AREA)

Abstract

The invention relates to a crimp head comprising at least one knurling wheel (3) for crimping the lid (1b) of a food tin (1). The knurling wheel (3) is guided along a path surrounding the tin (1) by means of a support piece (4) which includes a hub (4a) driven in rotation about the axis (X) of the crimp head, as well as a head (4d) carrying a journal (9) on which are mounted, on the same axis (Z), a cylindrical roller (10) rolling over a cam surface (7a) and a domed roller (11) rolling over a countercam surface (7b) inclined by a small angle (F). The position of the journal (9) and of the rollers (10, 11) can be adjusted according to the axis (Z) in order to make it possible to take up the guide tolerance (clearance). <IMAGE>

Description

La présente invention se rapporte à une tête de sertissage destinée à fermer de façon étanche les boîtes de conserve par sertissage du couvercle sur le corps de boîte, comprenant au moins une molette de sertissage montée sur une pièce support mobile qui la fait tourner, dans un plan parallèle au plan de travail sur lequel repose la boîte à sertir, suivant un trajet tel qu'elle se déplace exactement le long du contour de la boîte en restant appliquée contre celle-ci afin d'effectuer le sertissage du bord du couvercle sur le bord du corps de boîte; la molette est astreinte, via ladite pièce support, à suivre ce trajet grâce à des moyens de guidage associés à cette dernière, lesquels comprennent un galet rotatif d'axe perpendiculaire audit plan de travail et lié à ladite pièce support, et une surface de came cylindrique dont les génératrices, également perpendiculaires au plan de travail, se succèdent suivant un tracé approprié s'étendant parallèlement au plan de travail, le galet roulant contre la surface de came sous l'action de moyens qui le maintiennent en contact avec celle-ci.The present invention relates to a crimping head intended to seal the cans by sealing the lid on the can body, comprising at least one crimping wheel mounted on a movable support part which rotates it, in a plane parallel to the work surface on which the crimping box rests, following a path such that it moves exactly along the outline of the box while remaining pressed against it in order to crimp the edge of the cover onto the edge of the box body; the wheel is required, via said support piece, to follow this path thanks to guide means associated with the latter, which comprise a rotary roller of axis perpendicular to said work plane and linked to said support piece, and a cam surface cylindrical, the generators of which, also perpendicular to the work plane, follow one another along an appropriate path extending parallel to the work plane, the roller rolling against the cam surface under the action of means which keep it in contact with the latter .

Dans les têtes de sertissage de ce genre, utilisées en particulier pour réaliser le sertissage de boîtes de conserve à contour non circulaire, dites "boîtes de forme", le galet de guidage associé à chaque molette de sertissage est maintenu au contact de la surface de came par un ressort. Si le fonctionnement à l'aide de tels ressorts de rappel est satisfaisant lorsque la tête de sertissage travaille à cadence réduite, il n'en va pas de même lorsqu'on augmente sensiblement la cadence. Les effets d'inertie prennent alors de l'importance et causent des décollements intempestifs des galets de guidage. En outre, les ressorts, soumis à des sollicitations violentes et de grande fréquence, doivent être remplacés périodiquement.In crimping heads of this kind, used in particular for crimping cans with non-circular contours, called "shaped cans", the guide roller associated with each crimping wheel is kept in contact with the surface of cam by a spring. If the operation using such return springs is satisfactory when the crimping head works at a reduced rate, it is not the same when the rate is substantially increased. The inertia effects then become important and cause untimely detachments of the guide rollers. In addition, the springs, subjected to violent and high frequency stresses, must be replaced periodically.

La présente invention a pour but de remédier à ces inconvénients. A cet effet, selon l'invention, les ressorts de rappel précités sont remplacés, pour chaque galet, par des moyens de maintien dudit galet en contact avec la surface de came, comprenant d'une part un second galet rotatif, juxtaposé à ce premier galet et tournant autour du même axe, le second galet offrant une surface périphérique bombée, sa section par un plan radial étant une ligne courbe de convexité tournée vers l'extérieur, et d'autre part, située en regard de la surface de came précitée, une surface de contre-came constituant pour le second galet une surface d'appui et de roulement qui court parallèlement à la surface de came, offrant toutefois une légère inclinaison par rapport à la direction de l'axe commun des deux galets; la position relative, suivant la direction de cet axe, du second galet et de la surface de contre-came est ajustable afin de permettre le réglage du jeu entre l'ensemble des deux galets et les surfaces de came et de contre-came entre lesquelles cet ensemble est interposé.The present invention aims to remedy these drawbacks. To this end, according to the invention, the aforementioned return springs are replaced, for each roller, by means for holding said roller in contact with the cam surface, comprising on the one hand a second rotary roller, juxtaposed with this first roller and rotating around the same axis, the second roller offering a curved peripheral surface, its section by a radial plane being a curved line of convexity turned towards the outside, and on the other hand, situated opposite the abovementioned cam surface, a cam follower surface constituting for the second roller a bearing and rolling surface which short parallel to the cam surface, however offering a slight inclination relative to the direction of the common axis of the two rollers; the relative position, along the direction of this axis, of the second roller and the cam follower surface is adjustable in order to allow adjustment of the clearance between the assembly of the two rollers and the cam and cam follower surfaces between which this set is interposed.

Un tel agencement procure un maintien positif, sans aucun organe élastique de rappel, du premier galet contre la surface de came, les deux galets conjuguant leurs effets pour reprendre les efforts radiaux importants auxquels est soumise la molette, tandis que le jeu peut être éliminé par réglage de la position, en direction axiale, du second galet par rapport à la surface de contre-came. Dès lors, les moyens de guidage de chaque molette de sertissage en fonction du tracé de la surface de came n'imposent aucune limite à la cadence de travail de la tête de sertissage, les effets d'inertie et d'usure liés aux ressorts de rappel ayant disparu. On observera en outre que, du fait que les deux galets sont montés avec un même axe de rotation, le guidage s'opère indépendamment de l'orientation de la pièce support de la molette par rapport au tracé de la surface de came, l'écartement de celle-ci avec la surface de contre-came demeurant constant tout au long de leur tracé.Such an arrangement provides positive support, without any elastic return member, of the first roller against the cam surface, the two rollers combining their effects to take up the significant radial forces to which the wheel is subjected, while the play can be eliminated by adjustment of the position, in axial direction, of the second roller relative to the cam follower surface. Consequently, the means for guiding each crimping wheel as a function of the layout of the cam surface impose no limit on the working rate of the crimping head, the inertia and wear effects linked to the springs of reminder having disappeared. It will also be observed that, because the two rollers are mounted with the same axis of rotation, the guidance takes place independently of the orientation of the support part of the wheel relative to the layout of the cam surface, the spacing of the latter with the cam follower surface remaining constant throughout their course.

Dans une forme de réalisation préférée, le second galet a un diamètre inférieur à celui du premier galet et la surface de came a une dimension transversale couvrant l'épaisseur combinée des deux galets juxtaposés, tandis que la surface de contre-came a une dimension transversale moindre, telle qu'elle s'étend seulement face au second galet.In a preferred embodiment, the second roller has a diameter smaller than that of the first roller and the cam surface has a transverse dimension covering the combined thickness of the two juxtaposed rollers, while the cam follower surface has a transverse dimension lesser, such that it extends only opposite the second roller.

Avantageusement, les surfaces de came et de contre-came sont constituées par les flancs d'une gorge creusée dans un plateau suivant un tracé approprié et avec une section transversale constante, le second galet étant adjacent au fond de cette gorge.Advantageously, the cam and cam follower surfaces are formed by the sides of a groove hollowed out in a plate according to an appropriate layout and with a constant cross section, the second roller being adjacent to the bottom of this groove.

De préférence, la distance entre la surface de contre-came et le plan de travail est constante, et le réglage du jeu s'effectue par déplacement du second galet, au moins, dans la direction de son axe par rapport audit plan.Preferably, the distance between the cam follower surface and the work plane is constant, and the clearance is adjusted by displacement of the second roller, at least, in the direction of its axis relative to said plane.

Par ailleurs, on peut prévoir que l'écart mutuel des deux galets suivant la direction de leur axe commun soit constant. Cela signifie notamment que, lorsque le réglage s'effectue par déplacement axial du second galet, ce sont en fait les deux galets qui sont déplacés ensemble. Une telle disposition ne réagit en rien sur la précision du guidage, puisque la surface de came est une surface cylindrique de génératrices parallèles audit axe.Furthermore, it can be provided that the mutual difference of the two rollers in the direction of their common axis is constant. This means in particular that, when the adjustment is made by axial displacement of the second roller, it is in fact the two rollers which are moved together. Such an arrangement has no effect on the precision of the guidance, since the cam surface is a cylindrical surface of generatrices parallel to said axis.

Dans une forme de réalisation particulière où la distance entre la surface de contre-came et le plan de travail est constante, les deux galets sont montés coaxialement autour d'un même tourillon sur lequel ils sont calés en direction axiale, et ce tourillon est assujetti à la pièce support de la molette par des moyens de fixation permettant l'ajustement de sa position par rapport audit plan suivant la direction de l'axe commun des deux galets. Plus en détail, le tourillon peut comporter une extrémité filetée qui se visse dans une cavité taraudée ménagée dans ladite pièce support suivant la direction de l'axe commun des deux galets, cette cavité étant ouverte par une fente radiale de sorte qu'elle se trouve réalisée entre deux branches de fourche élastiquement déformables, qui peuvent être mutuellement serrées ou desserrées pour bloquer entre elles le tourillon sur la pièce support ou permettre le réglage de sa position par vissage ou dévissage progressif.In a particular embodiment where the distance between the cam follower surface and the work surface is constant, the two rollers are mounted coaxially around the same journal on which they are fixed in the axial direction, and this journal is subject to the support part of the wheel by fixing means allowing the adjustment of its position relative to said plane in the direction of the common axis of the two rollers. In more detail, the pin may have a threaded end which is screwed into a threaded cavity formed in said support piece in the direction of the common axis of the two rollers, this cavity being opened by a radial slot so that it is located produced between two elastically deformable fork legs, which can be tightened or loosened mutually to block the trunnion between them on the support part or allow its position to be adjusted by progressive screwing or unscrewing.

D'autres particularités et avantages de l'invention ressortiront de la description qui va suivre, en regard des dessins annexés, d'un exemple de réalisation non limitatif.Other features and advantages of the invention will emerge from the description which follows, with reference to the appended drawings, of a nonlimiting exemplary embodiment.

La figure 1 illustre la cinématique d'une tête de sertissage pour boîtes de forme.Figure 1 illustrates the kinematics of a crimping head for shaped boxes.

La figure 2 représente schématiquement, en coupe axiale, les principaux éléments associés à une molette dans une tête de sertissage selon l'invention.Figure 2 shows schematically, in axial section, the main elements associated with a wheel in a crimping head according to the invention.

On voit sur la figure 1 une boîte de conserve 1, formée d'un corps de boîte la et d'un couvercle 1b. Il s'agit d'une boîte de contour non circulaire, dite "boîte de forme". Celle-ci est posée sur un plan de travail horizontal P en un emplacement centré sur l'axe vertical X d'une tête de sertissage. Celle-ci a pour rôle d'effectuer le sertissage le long du bord du corps la du couvercle 1b maintenu pressé sur celui-ci par un mandrin 2 fixe (figure 2). Cette opération est réalisée à l'aide de molettes rotatives de sertissage dont l'une, portant la référence 3, est visible sur la figure 1. La molette 3, de même que les autres, est guidée de façon à se déplacer autour de la boîte 1, en tournant simultanément autour de leur axe vertical V, suivant un trajet T correspondant de façon précise au contour de la boîte. Chaque molette 3 est portée par une pièce 4 comportant un moyeu 4a pivotant autour d'un axe vertical Y, et deux bras 4b, 4c solidaires du moyeu 4a. La molette est montée à l'extrémité de l'un de ces bras, désigné par la référence 4b, auquel est lié son axe de rotation V. L'axe de pivotement Y du moyeu 4a est astreint à tourner autour de l'axe X de la tête de sertissage, en demeurant à une distance R constante de cet axe. A l'extrémité de l'autre bras 4c de la pièce support 4 est monté un galet 10 dont l'axe de rotation Z, vertical, est lié à ce bras. Le galet 10 est astreint à rouler contre une surface de came 7a dont le tracé est tel qu'il impose à la molette 3, via la pièce 4 tandis que le moyeu 4a de celle-ci effectue son mouvement de révolution autour de l'axe X, de suivre rigoureusement le contour de la boîte 1 à sertir. Ce résultat est illustré sur la figure 1, où on a indiqué deux positions D, D' de la pièce 4 et de ses accessoires, lesquels, dans la position D', sont désignés par les mêmes références que dans la position D, mais assorties du signe ['].We see in Figure 1 a can 1, formed of a can body 1a and a cover 1b. It is a contour box not circular, called "form box". This is placed on a horizontal work surface P at a location centered on the vertical axis X of a crimping head. Its role is to perform crimping along the edge of the body of the cover 1b kept pressed thereon by a fixed mandrel 2 (Figure 2). This operation is carried out using rotary crimping wheels, one of which, bearing the reference 3, is visible in FIG. 1. The wheel 3, like the others, is guided so as to move around the box 1, by simultaneously turning around their vertical axis V, along a path T corresponding precisely to the outline of the box. Each wheel 3 is carried by a part 4 comprising a hub 4a pivoting about a vertical axis Y, and two arms 4b, 4c secured to the hub 4a. The thumbwheel is mounted at the end of one of these arms, designated by the reference 4b, to which its axis of rotation V is linked. The pivot axis Y of the hub 4a is required to rotate around the axis X from the crimping head, remaining at a constant distance R from this axis. At the end of the other arm 4c of the support piece 4 is mounted a roller 10 whose axis of rotation Z, vertical, is linked to this arm. The roller 10 is forced to roll against a cam surface 7a whose layout is such that it imposes on the wheel 3, via the part 4 while the hub 4a thereof performs its movement of revolution around the axis X, strictly follow the outline of box 1 to be crimped. This result is illustrated in FIG. 1, where two positions D, D 'of the part 4 and its accessories have been indicated, which, in position D', are designated by the same references as in position D, but assorted of the sign ['].

Ainsi est réalisée l'opération de sertissage du couvercle 1b sur le corps de boîte 1a, tout au long du périmètre de la boîte.Thus is carried out the crimping operation of the cover 1b on the box body 1a, all along the perimeter of the box.

Il importe que cette opération puisse être effectuée avec une extrême précision dans le guidage de chaque molette de sertissage et cela à grande vitesse de façon à permettre une cadence de sertissage élevée.It is important that this operation can be carried out with extreme precision in guiding each crimping wheel and this at high speed so as to allow a high crimping rate.

Ces résultats sont obtenus grâce à l'adoption de dispositions spéciales relatives au galet de guidage 10, qui apparaissent sur la figure 2.These results are obtained thanks to the adoption of special provisions relating to the guide roller 10, which appear in FIG. 2.

Cette figure montre que le moyeu 4a est monté entre les branches 5a, 5b d'une pièce 5 comportant par ailleurs un manchon rotatif 5c centré sur l'axe X, qui peut tourner autour de cet axe mais non pas se déplacer le long de celui-ci. De ce fait, le moyeu 4a peut tourner autour de l'axe X, son propre axe Y restant à distance constante R de celui-ci, en conservant un espacement constant avec le plan P, c'est-à-dire en décrivant un cercle d'axe X parallèle au plan P et distant de celui-ci d'une quantité déterminée fixe. Il en résulte que la molette 3 est astreinte à se déplacer en restant à une hauteur constante au-dessus du plan P. Il en va de même de la tête 4d du bras 4c, située à l'extrémité de celui-ci éloignée du moyeu 4a, laquelle se déplace en restant dans un plan moyen Q parallèle au plan P et situé à une distance H déterminée fixe de ce plan.This figure shows that the hub 4a is mounted between the branches 5a, 5b of a part 5 further comprising a rotary sleeve 5c centered on the axis X, which can rotate around this axis but not move along that -this. As a result, the hub 4a can rotate around the axis X, its own axis Y remaining at a constant distance R from the latter, while maintaining a constant spacing with the plane P, that is to say by describing a circle of axis X parallel to the plane P and distant from it by a fixed fixed quantity. As a result, the wheel 3 is forced to move while remaining at a constant height above the plane P. The same applies to the head 4d of the arm 4c, located at the end of the latter remote from the hub 4a, which moves while remaining in a mean plane Q parallel to the plane P and located at a fixed fixed distance H from this plane.

La tête 4d du bras 4c est équipée d'un ensemble de guidage 6 incluant le galet 10 précité, qui astreint celui-ci à suivre, lorsque le moyeu 4a tourne autour de l'axe X, la surface de came 7a, réalisée dans un plateau fixe 8 dit "came de reproduction", situé à une distance J déterminée au-dessus du plan Q. Cette surface est une surface cylindrique dont les génératrices verticales s'appuient sur une ligne telle que l'axe Z du galet 10 suive un tracé G conçu pour que l'axe V de molette 3 se déplace en conséquence suivant un trajet T "reproduisant", compte tenu du rayon de la molette, le contour de la boîte 1.The head 4d of the arm 4c is equipped with a guide assembly 6 including the aforementioned roller 10, which compels the latter to follow, when the hub 4a rotates around the axis X, the cam surface 7a, produced in a fixed plate 8 known as a "reproduction cam", located at a determined distance J above the plane Q. This surface is a cylindrical surface whose vertical generatrices rest on a line such that the axis Z of the roller 10 follows a trace G designed so that the axis V of wheel 3 moves accordingly along a path T "reproducing", taking into account the radius of the wheel, the outline of box 1.

L'ensemble de guidage 6 comprend un tourillon 9 fixé à la tête 4d et offrant une forme générale de révolution autour d'un axe vertical Z; ce tourillon porte, outre le galet 10, un second galet 11 rotatif; ces deux galets sont montés l'un au-dessus de l'autre de façon à pouvoir tourner autour d'un même axe coïncidant avec l'axe Z précité. Le galet inférieur 10, de diamètre légèrement plus grand que le galet supérieur 11, présente une surface extérieure cylindrique de révolution d'axe Z et roule contre la surface de came 7a. Le galet supérieur 11 présente pour sa part une surface extérieure de révolution non pas cylindrique, mais bombée, sa section par un plan radial, passant par l'axe Z, étant constituée par un arc légèrement convexe vers l'extérieur. Ce galet coopère avec une surface de contre-came 7b, réalisée dans le plateau 8 en regard de la surface de came 7a. La surface 7b s'étend, comme la surface 7a, suivant un tracé parallèle à la ligne G le long de laquelle doit se déplacer l'axe Z. Il s'agit également d'une surface réglée, dont toutefois les génératrices, au lieu d'être parallèles aux axes Z et X, font avec eux un petit angle F de quelques degrés. Ainsi, la distance entre les surfaces de came 7a et de contre-came 7b, qui forment les flancs d'une gorge 7 creusée dans le plateau 8, va en diminuant à mesure que l'on s'éloigne de la tête 4d de la pièce 4. Quant au galet 11, il est adjacent au fond 7c de cette gorge.The guide assembly 6 comprises a pin 9 fixed to the head 4d and offering a general shape of revolution around a vertical axis Z; this journal carries, in addition to the roller 10, a second rotating roller 11; these two rollers are mounted one above the other so that they can rotate around the same axis coinciding with the aforementioned Z axis. The lower roller 10, of slightly larger diameter than the upper roller 11, has a cylindrical outer surface of revolution of axis Z and rolls against the cam surface 7a. The upper roller 11 for its part has an outer surface of revolution not cylindrical, but curved, its section through a radial plane, passing through the axis Z, being constituted by an arc slightly convex towards the outside. This roller cooperates with a cam follower surface 7b, produced in the plate 8 facing the cam surface 7a. The surface 7b extends, like the surface 7a, following a path parallel to the line G along which the Z axis must move. It is also a regulated surface, including the generators, instead of being parallel to the Z and X axes , make with them a small angle F of a few degrees. Thus, the distance between the cam 7a and cam follower 7b surfaces, which form the sides of a groove 7 hollowed out in the plate 8, decreases as one moves away from the head 4d of the piece 4. As for the roller 11, it is adjacent to the bottom 7c of this groove.

Comme le montre la figure 2, la surface de contre-came 7b ne se poursuit pas, en direction de la tête 4d, au delà du galet 11, afin de ne pas interférer avec le galet 10, de diamètre supérieur, interposé entre celui-ci et ladite tête.As shown in FIG. 2, the cam follower surface 7b does not continue, in the direction of the head 4d, beyond the roller 11, so as not to interfere with the roller 10, of larger diameter, interposed between it ci and said head.

Le tourillon 9 est fixé à la tête 4d par une partie filetée 9a d'axe Z qu'elle comporte, qui est vissée dans un passage fileté conjugué que comporte la tête 4d. Par vissage ou dévissage progressif du tourillon 9 dans la tête 4d, il est possible de le faire se déplacer par rapport à celle-ci dans la direction de l'axe Z. Un tel mouvement de translation se communique intégralement aux galets 10, 11 calés axialement sur le tourillon 9. Tandis que le galet cylindrique 10 coulisse alors le long d'une génératrice de la surface de came 7a sans causer aucune variation de la distance des axes Z et X, le galet bombé 11 coulisse le long d'une génératrice de la surface de contre-came 7b inclinée de l'angle F par rapport à l'axe X; il s'ensuit que, lorsqu'on fait augmenter, par réglage de la position de la pièce 9 sur l'axe Z, la distance K du galet 11 au plan fixe Q où se déplace la tête 4d, le jeu qui existait entre les surfaces 7a, 7b et les galets 10, 11 de l'ensemble de guidage 6 va en diminuant jusqu'au moment où il s'annule, les deux galets 10, 11 prenant alors simultanément appui chacun contre la surface 7a, 7b avec laquelle il coopère, le galet 10 étant en contact linéaire avec la surface 7a et le galet 11 en contact ponctuel avec la surface 7b. Lorsque ce réglage est atteint, le tourillon 9 est bloqué dans la tête 4d par serrage de sa partie filetée dans le passage fileté de la tête 4d, celle-ci étant à cet effet ouverte par une fente 13; une vis est engagée dans des trous 12 percés dans les deux branches correspondantes, séparées par cette fente, pour serrer élastiquement celles-ci contre la partie filetée 9a du tourillon 9 et bloquer ce dernier par pincement.The pin 9 is fixed to the head 4d by a threaded part 9a of axis Z which it comprises, which is screwed into a threaded conjugate passage which comprises the head 4d. By progressive screwing or unscrewing of the pin 9 in the head 4d, it is possible to make it move relative to the latter in the direction of the axis Z. Such a translational movement is communicated in full to the rollers 10, 11 wedged axially on the journal 9. While the cylindrical roller 10 then slides along a generatrix of the cam surface 7a without causing any variation in the distance of the axes Z and X, the convex roller 11 slides along a generatrix of the cam follower surface 7b inclined by the angle F relative to the axis X; it follows that, when one increases, by adjusting the position of the part 9 on the axis Z, the distance K of the roller 11 to the fixed plane Q where the head 4d moves, the clearance which existed between the surfaces 7a, 7b and the rollers 10, 11 of the guide assembly 6 decreases until it cancels, the two rollers 10, 11 then simultaneously pressing each against the surface 7a, 7b with which it cooperates, the roller 10 being in linear contact with the surface 7a and the roller 11 in point contact with the surface 7b. When this setting is reached, the pin 9 is blocked in the head 4d by clamping its threaded part in the threaded passage of the head 4d, the latter being for this purpose open by a slot 13; a screw is engaged in holes 12 drilled in the two corresponding branches, separated by this slot, for tighten elastically these against the threaded part 9a of the pin 9 and lock the latter by pinching.

Le réglage par rotation mesurée du tourillon 9 est facilité par le fait que celui-ci est doté d'une collerette 9b offrant à sa périphérie des cavités 14 qui donnent prise à un outil approprié d'entraînement en rotation.The adjustment by measured rotation of the pin 9 is facilitated by the fact that the latter is provided with a flange 9b offering at its periphery cavities 14 which give grip to an appropriate tool for driving in rotation.

On remarquera que, après comme avant un réglage de la position axiale du tourillon 9, la distance séparant les axes Z et X demeure inchangée, étant uniquement déterminée par le galet 10, de surface extérieure cylindrique, en appui contre la surface de came 7a, également cylindrique, les génératrices de ces deux surfaces s'étendant parallèlement aux axes précités. Autrement dit, le plus ou moins grand enfoncement du tourillon 9 et des galets 10, 11 dans la gorge 7 ne modifie pas les paramètres de guidage de la molette 3. Par conséquent, le positionnement de la molette 3, via la pièce support 4, reste indépendant des réglages de rattrapage de jeu de l'ensemble de guidage 6, de sorte qu'il y a conservation automatique de la précision du guidage de la molette 3 (de l'ordre du 1/100e mm pour une molette de première passe qui effectue un roulé de sertissage périphérique écrasé ensuite par une molette de deuxième passe).It will be noted that, after as before adjusting the axial position of the journal 9, the distance separating the axes Z and X remains unchanged, being only determined by the roller 10, of cylindrical outer surface, bearing against the cam surface 7a, also cylindrical, the generators of these two surfaces extending parallel to the aforementioned axes. In other words, the greater or lesser depression of the pin 9 and the rollers 10, 11 in the groove 7 does not modify the parameters for guiding the wheel 3. Consequently, the positioning of the wheel 3, via the support part 4, remains independent of the backlash adjustment settings of the guide assembly 6, so that there is automatic conservation of the precision of the guidance of the wheel 3 (of the order of 1/100 e mm for a first wheel pass which performs a peripheral crimping roll, then crushed by a second pass wheel).

Claims (7)

Tête de sertissage destinée à fermer de façon étanche les boîtes de conserve par sertissage du couvercle sur le corps de boîte, comprenant au moins une molette de sertissage montée sur une pièce support mobile qui la fait tourner, dans un plan parallèle au plan de travail sur lequel repose la boîte à sertir, suivant un trajet tel qu'elle se déplace exactement le long du contour de la boîte en restant appliquée contre celle-ci afin d'effectuer le sertissage du bord du couvercle sur le bord du corps de boîte, la molette étant astreinte, via ladite pièce support, à suivre ce trajet grâce à des moyens de guidage associés à cette dernière, lesquels comprennent un galet rotatif d'axe perpendiculaire audit plan de travail et lié à ladite pièce support, et une surface de came cylindrique dont les génératrices, également perpendiculaires au plan de travail, se succèdent suivant un tracé approprié s'étendant parallèlement au plan de travail, le galet roulant contre la surface de came sous l'action de moyens qui le maintiennent en contact avec celle-ci,
caractérisée par le fait que les moyens de maintien dudit galet (10) en contact avec la surface de came (7a) comprennent d'une part un second galet rotatif (11), juxtaposé à ce premier galet (10) et tournant autour du même axe, le second galet (11) offrant une surface périphérique bombée, sa section par un plan radial étant une ligne courbe de convexité tournée vers l'extérieur, et d'autre part, située en regard de la surface de came précitée, une surface de contre-came (7b) constituant pour le second galet une surface d'appui et de roulement qui court parallèlement à la surface de came (7a), offrant toutefois une légère inclinaison par rapport à la direction de l'axe commun (Z) des deux galets (10, 11), et que la position relative, suivant la direction de cet axe, du second galet (11) et de la surface de contre-came (7b) est ajustable afin de permettre le réglage du jeu entre l'ensemble des deux galets et les surfaces de came et de contre-came entre lesquelles cet ensemble est interposé.Crimping head intended to seal the cans tightly by crimping the lid onto the can body, comprising at least one crimping wheel mounted on a movable support part which makes it rotate, in a plane parallel to the work plane on which rests the crimp box, following a path such that it moves exactly along the outline of the box while remaining pressed against it in order to crimp the edge of the cover on the edge of the box body, the wheel being constrained, via said support piece, to follow this path thanks to guide means associated with the latter, which comprise a rotary roller of axis perpendicular to said work plane and linked to said support piece, and a cylindrical cam surface whose generators, also perpendicular to the work plan, follow one another along an appropriate route extending parallel to the work plan, the rolling roller co nter the cam surface under the action of means which keep it in contact with it,
characterized in that the means for holding said roller (10) in contact with the cam surface (7a) comprise on the one hand a second rotary roller (11), juxtaposed with this first roller (10) and rotating around the same axis, the second roller (11) offering a curved peripheral surface, its section through a radial plane being a curved line of convexity turned towards the outside, and on the other hand, located opposite the abovementioned cam surface, a surface cam follower (7b) constituting for the second roller a bearing and rolling surface which runs parallel to the cam surface (7a), however offering a slight inclination relative to the direction of the common axis (Z) of the two rollers (10, 11), and that the relative position, in the direction of this axis, of the second roller (11) and of the cam follower surface (7b) is adjustable in order to allow the clearance between the assembly of the two rollers and the cam and cam follower surfaces between which this together is interposed. Tête de sertissage selon la revendication 1, caractérisée par le fait que le second galet (11) a un diamètre inférieur à celui du premier galet (10) et que la surface de came (7a) a une dimension transversale couvrant l'épaisseur combinée des deux galets (10, 11) juxtaposés, tandis que la surface de contre-came (7b) a une dimension transversale moindre, telle qu'elle s'étend seulement face au second galet (11).Crimping head according to claim 1, characterized in that the second roller (11) has a diameter smaller than that of the first roller (10) and that the cam surface (7a) has a transverse dimension covering the combined thickness of the two juxtaposed rollers (10, 11), while the cam follower surface (7b) has a smaller transverse dimension, such that it extends only opposite the second roller (11). Tête de sertissage selon la revendication 1, caractérisée par le fait que les surfaces de came et de contre-came sont constituées par les flancs (7a, 7b) d'une gorge (7) creusée dans un plateau (8) suivant un tracé approprié et avec une section transversale constante, le second galet (11) étant adjacent au fond (7c) de cette gorge.Crimping head according to claim 1, characterized in that the cam and cam follower surfaces are formed by the sides (7a, 7b) of a groove (7) hollowed out in a plate (8) according to an appropriate layout and with a constant cross section, the second roller (11) being adjacent to the bottom (7c) of this groove. Tête de sertissage selon l'une quelconque des revendications 1 à 3, caractérisée par le fait que la distance entre la surface de contre-came (7b) et le plan de travail (P) est constant, et que le réglage du jeu s'effectue par déplacement du second galet (11), au moins, dans la direction de son axe (Z) par rapport audit plan.Crimping head according to any one of Claims 1 to 3, characterized in that the distance between the cam follower surface (7b) and the work surface (P) is constant, and that the adjustment of the clearance is performs by displacement of the second roller (11), at least, in the direction of its axis (Z) relative to said plane. Tête de sertissage selon l'une quelconque des revendications 1 à 4, caractérisée par le fait que l'écart mutuel des deux galets (10, 11) suivant la direction de leur axe commun (Z) est constant.Crimping head according to any one of Claims 1 to 4, characterized in that the mutual deviation of the two rollers (10, 11) in the direction of their common axis (Z) is constant. Tête de sertissage selon la revendication 5, caractérisée par le fait que la distance entre la surface de contre-came (7b) et le plan de travail (P) est constante, que les deux galets (10, 11) sont montés coaxialement autour d'un même tourillon (9) sur lequel ils sont calés en direction axiale, et que ce tourillon est assujetti à la pièce support (4) portant la molette (3) par des moyens de fixation permettant l'ajustement de sa position par rapport audit plan suivant la direction de l'axe commun (Z) des deux galets.Crimping head according to claim 5, characterized in that the distance between the cam follower surface (7b) and the work surface (P) is constant, that the two rollers (10, 11) are mounted coaxially around d '' the same pin (9) on which they are wedged in the axial direction, and that this pin is subject to the support piece (4) carrying the wheel (3) by fixing means allowing the adjustment of its position relative to said plane in the direction of the common axis (Z) of the two rollers. Tête de sertissage selon la revendication 6, caractérisée par le fait que le tourillon (9) comporte une extrémité filetée (9a) qui se visse dans une cavité taraudée ménagée dans ladite pièce support (4) suivant la direction de l'axe commun (Z) des deux galets (10, 11), cette cavité étant ouverte par une fente radiale (13) de sorte qu'elle se trouve réalisée entre deux branches de fourche élastiquement déformables, qui peuvent être mutuellement serrées ou desserrées pour bloquer entre elles le tourillon (9) sur la pièce support (4) ou permettre le réglage de sa position par vissage ou dévissage progressif.Crimping head according to claim 6, characterized in that the pin (9) has a threaded end (9a) which screws into a threaded cavity formed in said support piece (4) in the direction of the common axis (Z ) of the two rollers (10, 11), this cavity being opened by a radial slot (13) so that it is produced between two elastically deformable fork legs, which can be tightened or loosened to block the trunnion between them (9) on the support part (4) or allow the adjustment of its position by progressive screwing or unscrewing.
EP93401560A 1992-06-22 1993-06-17 Crimp head for food tins comprising tolerance regulating means Expired - Lifetime EP0576332B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9207594 1992-06-22
FR9207594A FR2692548B1 (en) 1992-06-22 1992-06-22 Crimping head for a can, provided with clearance adjustment means.

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EP0576332A1 true EP0576332A1 (en) 1993-12-29
EP0576332B1 EP0576332B1 (en) 1996-04-17

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US (1) US5390471A (en)
EP (1) EP0576332B1 (en)
DE (1) DE69302227T2 (en)
ES (1) ES2086902T3 (en)
FR (1) FR2692548B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892191A1 (en) * 2005-05-17 2008-02-27 Toyo Seikan Kaisha, Ltd. Square can and method and device for double-seaming the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6163951A (en) * 1999-03-31 2000-12-26 Sealright Co., Inc. Method and apparatus for lifting tabs of a laminate from a substrate
GB9912264D0 (en) * 1999-05-27 1999-07-28 Meltog Ltd Adjustment mechanism

Citations (2)

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Publication number Priority date Publication date Assignee Title
US2907293A (en) * 1956-10-09 1959-10-06 Angelus Sanitary Can Machine C Seaming head for non-circular cans
FR1220627A (en) * 1958-05-30 1960-05-25 Metal Box Co Ltd Improvements to the stapling mechanisms intended to fix the bottoms to the bodies of metal boxes

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Publication number Priority date Publication date Assignee Title
US1972866A (en) * 1931-07-06 1934-09-11 American Can Co Double seaming head
US2149543A (en) * 1936-12-24 1939-03-07 Peyser Hansen Machine Co Inc Seaming mechanism
US2271152A (en) * 1938-05-28 1942-01-27 Continental Can Co Square can seaming head
US2432815A (en) * 1943-06-28 1947-12-16 Continental Can Co Square can seaming head
US2467154A (en) * 1946-07-26 1949-04-12 Pacific Can Company Noncircular can seaming head

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907293A (en) * 1956-10-09 1959-10-06 Angelus Sanitary Can Machine C Seaming head for non-circular cans
FR1220627A (en) * 1958-05-30 1960-05-25 Metal Box Co Ltd Improvements to the stapling mechanisms intended to fix the bottoms to the bodies of metal boxes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892191A1 (en) * 2005-05-17 2008-02-27 Toyo Seikan Kaisha, Ltd. Square can and method and device for double-seaming the same
EP1892191A4 (en) * 2005-05-17 2008-06-04 Toyo Seikan Kaisha Ltd Square can and method and device for double-seaming the same

Also Published As

Publication number Publication date
EP0576332B1 (en) 1996-04-17
US5390471A (en) 1995-02-21
FR2692548A1 (en) 1993-12-24
DE69302227D1 (en) 1996-05-23
ES2086902T3 (en) 1996-07-01
FR2692548B1 (en) 1994-10-07
DE69302227T2 (en) 1996-09-12

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