EP1391277A2 - Centering means for a planar tool - Google Patents

Centering means for a planar tool Download PDF

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Publication number
EP1391277A2
EP1391277A2 EP03018072A EP03018072A EP1391277A2 EP 1391277 A2 EP1391277 A2 EP 1391277A2 EP 03018072 A EP03018072 A EP 03018072A EP 03018072 A EP03018072 A EP 03018072A EP 1391277 A2 EP1391277 A2 EP 1391277A2
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EP
European Patent Office
Prior art keywords
tool
head
boss
faces
planar
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.)
Withdrawn
Application number
EP03018072A
Other languages
German (de)
French (fr)
Other versions
EP1391277A3 (en
Inventor
Jean-Pierre Steiner
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.)
Bobst Mex SA
Original Assignee
Bobst SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bobst SA filed Critical Bobst SA
Publication of EP1391277A2 publication Critical patent/EP1391277A2/en
Publication of EP1391277A3 publication Critical patent/EP1391277A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D2007/189—Mounting blanking, stripping and break-out tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D2007/2607—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member for mounting die cutters
    • 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
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20—Cutting sheets or blanks

Definitions

  • the present invention relates to a centering member of a tool plan, preferably used in a packaging production machine such as a platen press shaping sheets of paper, cardboard or plastic material in order to obtain blanks of boxes.
  • Such a machine usually first comprises a station introduction, in which the sheets are apprehended one by one from the above a stack to be sent to a margin table where they are positioned at regular intervals in the axis of the machine. Each sheet can then be gripped at its front edge by a clamp bar mounted at its ends on a chain train and taken to the stations following treatment. The sheet is thus transported to a cutting, including a platen press fitted with knives, then in an ejection station where the waste is removed from the rest of the sheet by nipping between a plurality of ejectors. Once cut and cleared its waste, the sheet is finally taken to a receiving station where it is released by the clamp bar to fall square to the above an output stack.
  • a station introduction in which the sheets are apprehended one by one from the above a stack to be sent to a margin table where they are positioned at regular intervals in the axis of the machine.
  • Each sheet can then be gripped at its front edge by a clamp bar mounted at its ends on a
  • the corresponding stations are equipped with flat tools, usually formed of a rectangular wooden base plate, in which are in particular inserted knives, respectively ejectors.
  • the sheet is brought flat on a first perforated planar tool along the periphery of the zones to be ejected.
  • Ejectors and pressers are arranged in an upper ejection tool. This last one is driven by a vertical reciprocating movement, synchronized so that the tool is lowered soon after the sheet arrives on the perforated tool.
  • a second planar ejection tool called tool lower, supporting vertical telescopic needles arranged in correspondence with the ejectors of the upper planar tool. So when the tool lower on the cut sheet, all the waste is pinched between ejectors and ejection needles and are pushed down and removed from the sheet in one operation.
  • each flat tool is positioned exactly, longitudinally and laterally, in perfect location on the leaf scroll axis.
  • This axis defining a central reference line, common for the lateral positioning of all tools in all stations.
  • the flat tools are each equipped with a centering pin fixed on the center line of the tool, in the edge frontal downstream of the ejection board.
  • centering studs can either be inserted into a notch centered on the longitudinal axis of reference and machined in correspondence in the machine, either come into engagement between a cam and a stop of the fixing and centering system mounted in the drawer frame of the planar tool.
  • Examples of devices including ejection boards fitted with such centering studs are given in the patents CH690988, CH691035 and in patent application EP1074353.
  • centering studs are generally in hard plastic and are fixed in the flat tool using two wood screws. For each new job given, it is necessary to work at the preparation of all flat tools before their introduction into the machine. It is during this preparation that the centering studs are notably fixed, by screwing, on each tool intended to work in machine.
  • the object of the present invention is to remedy these drawbacks and aims to considerably reduce the assembly time of the centering pads as well as the cost of this operation.
  • the subject of the present invention allows any tool to be able to have a centering whose fastening method is very fast while remaining precise, solid and reliable. It has the advantage of being able to be fixed without the aid of any mechanical fixing part, such as screws, pins or rivets, and without the addition no substance or adhesive element against its surface. Thanks to its shape specific, the object of the present invention can be fixed permanently in the tool plan with a small mallet, or even by simple pressure of the hand. Its fixation permanent avoids any risk of wanting to recover it and makes it a consumable or product to be discarded after use.
  • the subject of the present invention is a device for centering in accordance with claim 1.
  • Figure 1 shows in perspective a centering member 1 in the form of a stud with deliberately exaggerated dimensions; the normal size of such a pad being generally of the order of 20 mm on a side.
  • the centering member 1 consists of a base 2, generally square or rectangular, having two lateral faces 3, 4, a front face 5 and a rear face 6.
  • a front face 5 and a rear face 6 against the lower face 7 of the base 2, two emerge bosses 10, 20 placed flush with the respective faces 5 and 6.
  • the first boss 10 is formed by a straight parallelepiped, milled here with a groove in its inside face.
  • the second boss 20 also comes from a parallelepiped straight in which is cut a trunk 21 surmounted by a prominent head 22 having at least one projection 23, preferably two, relative to the lateral faces 24 of the trunk 21.
  • the projections 23 have oblique faces whose extension converges above the head 22 and gives this last a trapezoidal shape.
  • Each face of these projections is defined at its base by a preferably horizontal edge 25.
  • the head 22 is therefore in the form of a claw whose ends are elastic and slightly deformable.
  • FIG. 2 represents the same centering member but in a bottom view showing a horizontal bore 30, passing right through the two bosses 10, 20.
  • a conical countersink 31 is made in the outer front face of the boss 10, in the axis of the bore 30.
  • a planar tool 40, or board is illustrated. ejection, in which the member 1 is intended to be fixed therein in order to fill its centering function when introducing this tool into the machine.
  • the planar tool 40 is the ejection board on which the sheets cut to stop to get rid of their waste. In this operation, this waste is removed from the sheet, down through the openings 41 practiced in this board.
  • the centering member 1 is assembled in the planar tool 40 by exerting, preferably on the upper face of the base 2, a pressure vertical down.
  • the manufacturing tolerances of the planar tool and those of the member 1 are such that they ensure an ideal nesting of these two parts without any play.
  • the assembly of these two parts is blocked by the projecting parts 23, the edges 25 of which bear against the walls lateral 44 of opening 42 by pushing against them directed outward. Head 22 does not emerge or only emerges partially from the bottom surface of the planar tool 40.
  • the edge of the sheet should encroach on a small part of the square initially reserved for the arrangement of the centering member. In this case, it can happen that we have to trim a part of this organ in order to ensure, for example, correct ejection of waste slightly overflowing on the surface of opening 42.
  • the centering member is amputated by too large a portion, his fixation system risks becoming deficient and no longer able to be operational or sufficiently reliable to guarantee a lasting fixation.
  • a variant of the present invention could consist in modifying the general shape of the centering member to further reduce space occupied on the surface of the tool while retaining the method of attachment by snap.
  • the shape of the boss 20, and more particularly that of the trunk 21 and / or of the head 22, could also present a very different aspect from that given as an example in Figures 1 and 2, without prejudice to the method of attachment presented.
  • the shape of the opening 42 could also be subject to adaptations. The same goes of course for this which is the boss 10 and the corresponding notch 43.
  • the organ of the present invention aims to be inserted into the planar tool 40 so that the base 2 preferably appears above the upper surface of this tool.
  • this base is embedded in the thickness of the tool or turned upside down to gain support against the underside of the latter.
  • the centering member as described here comprises a single boss 20 gripping. However, nothing prevents the provision of several means of grip fitting into as many openings 42 or transforming the boss 10 into a fixing boss through the notch 43.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Labeling Devices (AREA)
  • Making Paper Articles (AREA)

Abstract

The centering part (1) for a packaging machine plane tool comprises a square or rectangular base (2) having side face (3) and front and rear (6) faces. Two bosses (10,20) emerge against the base lower face (7). The second boss has a section (21) surmounted by a protuberant head (22) having a projection (23) allowing its permanent fixing in an opening in one of the faces of the tool without the addition of any mechanical fixing part or adhesive substance.

Description

La présente invention a pour objet un organe de centrage d'un outil plan, utilisé préférentiellement dans une machine de production d'emballages telle qu'une presse à platine façonnant des feuilles de papier, de carton ou de matière plastique en vue d'en obtenir des ébauches de boítes.The present invention relates to a centering member of a tool plan, preferably used in a packaging production machine such as a platen press shaping sheets of paper, cardboard or plastic material in order to obtain blanks of boxes.

Une telle machine comprend usuellement d'abord une station d'introduction, dans laquelle les feuilles sont appréhendées une à une du dessus d'une pile pour être envoyées sur une table de marge où elles sont mises en position à intervalles réguliers dans l'axe de la machine. Chaque feuille peut alors être saisie en son bord frontal par une barre de pinces montée en ses extrémités sur un train de chaínes et emmenée dans les stations de traitement suivantes. La feuille est ainsi transportée dans une station de découpage, comprenant une presse à platine munie de couteaux, puis dans une station d'éjection où les déchets sont retirés du reste de la feuille par pincement entre une pluralité d'éjecteurs. Une fois découpée et débarrassée de ses déchets, la feuille est finalement emmenée dans une station de réception où elle est relâchée par la barre de pinces pour tomber à l'équerre sur le dessus d'une pile de sortie.Such a machine usually first comprises a station introduction, in which the sheets are apprehended one by one from the above a stack to be sent to a margin table where they are positioned at regular intervals in the axis of the machine. Each sheet can then be gripped at its front edge by a clamp bar mounted at its ends on a chain train and taken to the stations following treatment. The sheet is thus transported to a cutting, including a platen press fitted with knives, then in an ejection station where the waste is removed from the rest of the sheet by nipping between a plurality of ejectors. Once cut and cleared its waste, the sheet is finally taken to a receiving station where it is released by the clamp bar to fall square to the above an output stack.

Pour effectuer les opérations de découpage et de retrait des déchets, les stations correspondantes sont équipées d'outils plans, généralement formés d'une plaque de base rectangulaire en bois, dans lesquels sont notamment insérés des couteaux, respectivement des éjecteurs.To perform the operations of cutting and removing waste, the corresponding stations are equipped with flat tools, usually formed of a rectangular wooden base plate, in which are in particular inserted knives, respectively ejectors.

Dans la station d'éjection, la feuille est amenée à plat sur un premier outil plan ajouré selon le pourtour des zones à éjecter. Des éjecteurs et des presseurs sont agencés dans un outil d'éjection supérieur. Ce dernier est animé d'un mouvement alternatif vertical, synchronisé de façon à ce que l'outil soit abaissé peu après l'arrivée de la feuille sur l'outil ajouré. Au-dessous de cet outil ajouré se trouve généralement un deuxième outil d'éjection plan, dit outil inférieur, supportant des aiguilles verticales télescopiques disposées en correspondance avec les éjecteurs de l'outil plan supérieur. Ainsi, lorsque l'outil supérieur s'abaisse sur la feuille découpée, tous les déchets sont pincés entre les éjecteurs et les aiguilles d'éjection et sont poussés vers le bas et retirés de la feuille en une seule opération.In the ejection station, the sheet is brought flat on a first perforated planar tool along the periphery of the zones to be ejected. Ejectors and pressers are arranged in an upper ejection tool. This last one is driven by a vertical reciprocating movement, synchronized so that the tool is lowered soon after the sheet arrives on the perforated tool. Below this openwork tool is usually a second planar ejection tool, called tool lower, supporting vertical telescopic needles arranged in correspondence with the ejectors of the upper planar tool. So when the tool lower on the cut sheet, all the waste is pinched between ejectors and ejection needles and are pushed down and removed from the sheet in one operation.

Ces outils plans sont généralement montés dans des cadre tiroirs permettant de les sortir et de les réinstaller dans la station par simple coulissement au travers d'une fenêtre latérale prévue à cet effet dans la machine. Afin que le découpage de la feuille et que l'éjection des déchets puissent, dans leur station respective, se faire avec précision à très haute cadence (8'000 à 10'000 feuilles/heure selon les formats), il est nécessaire que chaque outil plan soit exactement positionné, longitudinalement et latéralement, en parfait repérage sur l'axe de défilement des feuilles. Cet axe définissant une ligne centrale de référence, commune pour le positionnement latéral de tous les outils dans toutes les stations. A cet effet, les outils plans sont chacun équipés d'un plot de centrage fixé sur la ligne médiane de l'outil, dans le bord frontal aval de la planche d'éjection. De cette façon, ces plots de centrage peuvent soit venir s'insérer dans une encoche centrée sur l'axe longitudinal de référence et usinée en correspondance dans la machine, soit venir en prise entre une came et une butée du système de fixation et de centrage monté dans le cadre tiroir de l'outil plan. Des exemples de dispositifs comprenant des planches d'éjection garnies de tels plots de centrage sont donnés dans les brevets CH690988, CH691035 et dans la demande de brevet EP1074353.These flat tools are generally mounted in drawer frames allowing them to be taken out and reinstalled in the station by simple sliding through a side window provided for this purpose in the machine. So that the cutting of the sheet and the ejection of waste can, in their respective station, be done with precision at very high rate (8,000 to 10,000 sheets / hour depending on the formats), it is necessary that each flat tool is positioned exactly, longitudinally and laterally, in perfect location on the leaf scroll axis. This axis defining a central reference line, common for the lateral positioning of all tools in all stations. For this purpose, the flat tools are each equipped with a centering pin fixed on the center line of the tool, in the edge frontal downstream of the ejection board. In this way, these centering studs can either be inserted into a notch centered on the longitudinal axis of reference and machined in correspondence in the machine, either come into engagement between a cam and a stop of the fixing and centering system mounted in the drawer frame of the planar tool. Examples of devices including ejection boards fitted with such centering studs are given in the patents CH690988, CH691035 and in patent application EP1074353.

Obtenus par moulage, ces plots de centrage sont généralement en matière plastique dure et sont fixés dans l'outil plan à l'aide de deux vis à bois. Pour chaque nouveau travail donné, il est nécessaire de s'affairer à la préparation de tous les outils plans avant leur introduction en machine. C'est durant cette préparation que les plots de centrage sont notamment fixés, par vissage, sur chaque outil destiné à travailler en machine.Obtained by molding, these centering studs are generally in hard plastic and are fixed in the flat tool using two wood screws. For each new job given, it is necessary to work at the preparation of all flat tools before their introduction into the machine. It is during this preparation that the centering studs are notably fixed, by screwing, on each tool intended to work in machine.

Or, l'inconvénient d'un tel mode de fixation réside principalement dans le temps de montage que nécessite la fixation de chacun de ces plots de centrage. A cet effet, il convient tout d'abord de prévoir le perçage d'avant-trous pour le guidage des vis de fixation. Etant souvent de petite taille, ces dernières sont difficiles à manipuler et peuvent facilement s'échapper des mains du monteur, accroissant ainsi le temps nécessaire pour l'agencement du plot de centrage. Généralement, lorsqu'une vis tombe au sol elle n'est pas retrouvée ou n'est simplement pas ramassée par le monteur qui, d'expérience, a pris l'habitude de prévoir cet incident et se munit d'avance d'une vis supplémentaire. En conséquence, il arrive souvent que le stock de vis prévu pour ces plots s'épuise plus vite que celui des plots eux-mêmes, forçant alors le monteur à devoir recourir au service d'un magasinier pour se procurer les vis dont il a nécessairement besoin. Compte tenu du salaire horaire du monteur, du temps alloué à la fixation des plots de centrage, du prix des vis et du coût de la gestion de leur stock, il apparaít finalement que le prix de revient d'un tel plot de centrage est tout à fait dérisoire (env. 4%) en regard du coût global que représente son montage sur l'outil plan en question. De plus, le mode de fixation démontable de ces plots de centrage tente parfois certaines personnes appliquées à vouloir encore les récupérer; multipliant ainsi presque par deux le coût final de l'opération.However, the drawback of such a method of attachment mainly lies in the assembly time that the fixing of each of these studs requires centering. For this purpose, it is first of all necessary to provide for the drilling of pilot holes. for guiding the fixing screws. Often being small, the latter are difficult to handle and can easily escape from the hands of the fitter, thus increasing the time necessary for the arrangement of the stud centering. Generally, when a screw falls to the ground it is not found or is simply not picked up by the fitter who, from experience, has taken used to foresee this incident and get a screw in advance additional. As a result, it often happens that the expected stock of screws for these studs runs out faster than that of the studs themselves, forcing the fitter to have to resort to the service of a storekeeper to get the screws which he necessarily needs. Considering the editor's hourly wages, the time allocated to fixing the centering studs, the price of the screws and the cost of the management of their stock, it finally appears that the cost price of such a stud of centering is completely ridiculous (approx. 4%) compared to the total cost that represents its mounting on the planar tool in question. In addition, the mode of removable fixing of these centering studs sometimes tries some people applied to want to recover them again; thus almost doubling the final cost of the operation.

La présente invention a pour but de remédier à ces inconvénients et vise à réduire considérablement le temps de montage des plots de centrage ainsi que le coût que représente cette opération. A ces fins, l'objet de la présente invention permet à tout outil de pouvoir se doter d'un organe de centrage dont le mode de fixation est très rapide tout en restant à la fois précis, solide et fiable. Il présente l'avantage de pouvoir être fixé sans l'aide d'aucune pièce mécanique de fixation, telle que vis, goupille ou rivet, et sans l'adjonction d'aucune substance ou élément adhésif contre sa surface. Grâce à sa forme spécifique, l'objet de la présente invention peut être fixé à demeure dans l'outil plan à l'aide d'un petit maillet, voire par simple pression de la main. Sa fixation permanente évite tout risque de vouloir le récupérer et en fait un consommable ou produit à jeter après utilisation.The object of the present invention is to remedy these drawbacks and aims to considerably reduce the assembly time of the centering pads as well as the cost of this operation. For these purposes, the subject of the present invention allows any tool to be able to have a centering whose fastening method is very fast while remaining precise, solid and reliable. It has the advantage of being able to be fixed without the aid of any mechanical fixing part, such as screws, pins or rivets, and without the addition no substance or adhesive element against its surface. Thanks to its shape specific, the object of the present invention can be fixed permanently in the tool plan with a small mallet, or even by simple pressure of the hand. Its fixation permanent avoids any risk of wanting to recover it and makes it a consumable or product to be discarded after use.

A cet effet, la présente invention a pour objet un organe de centrage conforme à ce qu'énonce la revendication 1.To this end, the subject of the present invention is a device for centering in accordance with claim 1.

L'invention sera mieux comprise à l'étude d'un mode de réalisation pris à titre nullement limitatif et illustré par les figures annexées dans lesquelles:

  • la figure 1 représente une vue en perspective d'un organe de centrage conforme à la présente invention,
  • la figure 2 représente le même objet dans une vue de dessous,
  • la figure 3 représente un outil plan dans lequel l'organe de centrage de la présente invention est destiné à venir se fixer.
The invention will be better understood from the study of an embodiment taken without any limitation being implied and illustrated by the appended figures in which:
  • FIG. 1 represents a perspective view of a centering member in accordance with the present invention,
  • FIG. 2 represents the same object in a view from below,
  • FIG. 3 represents a planar tool in which the centering member of the present invention is intended to be fixed.

La figure 1 représente en perspective un organe 1 de centrage se présentant sous la forme d'un plot aux dimensions volontairement exagérées; la taille normale d'un tel plot étant généralement de l'ordre de 20 mm de côté. L'organe 1 de centrage se compose d'une embase 2, de forme généralement carrée ou rectangulaire, présentant deux faces latérales 3, 4, une face avant 5 et une face arrière 6. Contre la face inférieure 7 de l'embase 2, émergent deux bossages 10, 20 placés à fleur des faces respectives 5 et 6. Le premier bossage 10 est formé d'un parallélépipède droit, fraisé ici d'une rainure dans sa face intérieure. Figure 1 shows in perspective a centering member 1 in the form of a stud with deliberately exaggerated dimensions; the normal size of such a pad being generally of the order of 20 mm on a side. The centering member 1 consists of a base 2, generally square or rectangular, having two lateral faces 3, 4, a front face 5 and a rear face 6. Against the lower face 7 of the base 2, two emerge bosses 10, 20 placed flush with the respective faces 5 and 6. The first boss 10 is formed by a straight parallelepiped, milled here with a groove in its inside face.

Le second bossage 20 est également issu d'un parallélépipède droit dans lequel est taillé un tronc 21 surmonté d'une tête proéminente 22 présentant au moins une saillie 23, préférentiellement deux, par rapport aux faces latérales 24 du tronc 21. Les saillies 23 possèdent des faces obliques dont leur prolongement convergent au-dessus de la tête 22 et donnent à cette dernière une forme trapézoïdale. Chaque face de ces saillies est définie à sa base par une arête préférentiellement horizontale 25. A la jointure du tronc 21 et de la tête 22, se trouvent deux saignées 26 conférant aux saillies 23 une certaine élasticité mécanique par rapport au reste du bossage 20. La tête 22 se présente donc sous la forme d'une griffe dont les extrémités sont élastiques et légèrement déformables.The second boss 20 also comes from a parallelepiped straight in which is cut a trunk 21 surmounted by a prominent head 22 having at least one projection 23, preferably two, relative to the lateral faces 24 of the trunk 21. The projections 23 have oblique faces whose extension converges above the head 22 and gives this last a trapezoidal shape. Each face of these projections is defined at its base by a preferably horizontal edge 25. At the junction of the trunk 21 and from the head 22, there are two grooves 26 giving the projections 23 a certain mechanical elasticity with respect to the rest of the boss 20. The head 22 is therefore in the form of a claw whose ends are elastic and slightly deformable.

La figure 2 représente le même organe de centrage mais dans une vue de dessous montrant un perçage 30 horizontal, traversant de part en part les deux bossages 10, 20. Préférentiellement, une fraisure conique 31 est pratiquée dans la face avant extérieure du bossage 10, dans l'axe du perçage 30.FIG. 2 represents the same centering member but in a bottom view showing a horizontal bore 30, passing right through the two bosses 10, 20. Preferably, a conical countersink 31 is made in the outer front face of the boss 10, in the axis of the bore 30.

En exemple dans la figure 3, est illustré un outil plan 40, ou planche d'éjection, dans lequel l'organe 1 est destiné à venir s'y fixer en vue de remplir sa fonction de centrage lors de l'introduction de cet outil en machine.In example in FIG. 3, a planar tool 40, or board, is illustrated. ejection, in which the member 1 is intended to be fixed therein in order to fill its centering function when introducing this tool into the machine.

L'illustration de cette figure permet de mieux comprendre la façon dont l'organe de la présente invention est assemblé définitivement à l'outil pour lequel il est destiné, sans l'aide d'aucune pièce supplémentaire.The illustration in this figure helps to better understand how whose member of the present invention is permanently assembled to the tool for which it is intended for, without the aid of any additional parts.

L'outil plan 40 est la planche d'éjection sur laquelle les feuilles découpées viennent s'arrêter pour être débarrassées de leurs déchets. Dans cette opération, ces déchets sont retirés de la feuille, vers le bas au travers des ajours 41 pratiqués dans cette planche.The planar tool 40 is the ejection board on which the sheets cut to stop to get rid of their waste. In this operation, this waste is removed from the sheet, down through the openings 41 practiced in this board.

Non loin du bord aval de l'outil plan, est ménagée une ouverture 42 de façon à ce que le bossage 20 puisse venir s'y insérer. Sur le bord aval de cette même planche est usinée, en correspondance, une échancrure 43 permettant au premier bossage 10 de pouvoir s'y glisser à fleur avec précision. De telles ouvertures peuvent avantageusement être usinées au laser par exemple. L'assemblage de l'organe 1 de centrage dans l'outil plan 40 s'effectue en exerçant, de préférence sur la face supérieure de l'embase 2, une pression verticale vers le bas. Les tolérances de fabrication de l'outil plan et celles de l'organe 1 sont telles qu'elles assurent un emboítement idéal de ces deux pièces sans aucun jeu. L'assemblage de ces deux pièces se trouve bloqué par les parties saillantes 23, dont les arêtes 25 prennent appuis contre les parois latérales 44 de l'ouverture 42 en exerçant contre ces dernières une poussée dirigée vers l'extérieure. La tête 22 n'émerge pas ou n'émerge que partiellement de la surface inférieure de l'outil plan 40.Not far from the downstream edge of the planar tool is an opening 42 so that the boss 20 can be inserted therein. On the downstream edge of this same board is machined, in correspondence, a notch 43 allowing the first boss 10 to be able to slide there flush with precision. Advantageously, such openings can be laser machined by example. The centering member 1 is assembled in the planar tool 40 by exerting, preferably on the upper face of the base 2, a pressure vertical down. The manufacturing tolerances of the planar tool and those of the member 1 are such that they ensure an ideal nesting of these two parts without any play. The assembly of these two parts is blocked by the projecting parts 23, the edges 25 of which bear against the walls lateral 44 of opening 42 by pushing against them directed outward. Head 22 does not emerge or only emerges partially from the bottom surface of the planar tool 40.

Dans un autre mode de réalisation, il est également possible de prévoir le dégagement total de la tête 22 de la surface inférieure de l'outil plan de sorte que la hauteur du tronc 21 soit alors sensiblement égale à celle de l'épaisseur de l'outil plan 40. Dans ce cas, les arêtes 25 prennent appuis contre la face inférieure de l'outil et empêchent tout déplacement de l'organe de centrage.In another embodiment, it is also possible to provide for the total clearance of the head 22 from the lower surface of the planar tool so that the height of the trunk 21 is then substantially equal to that of the thickness of the planar tool 40. In this case, the edges 25 bear against the underside of the tool and prevent movement of the centering.

Selon le nombre de poses à découper et suivant leur arrangement sur la feuille dans les limites physiques de l'outil plan, il se peut parfois que le bord de la feuille doive empiéter sur une petite partie de la place initialement réservée à l'agencement de l'organe de centrage. Dans ce cas, il peut arriver que l'on doive rogner une partie de cet organe afin d'assurer, par exemple, une éjection correcte d'un déchet débordant quelque peu sur la surface de l'ouverture 42. Or, si l'organe de centrage est amputé d'une trop grande portion, son système de fixation risque de devenir déficient et ne plus pouvoir être opérationnel ou suffisamment fiable pour garantir une fixation durable. Pour pallier cette éventualité tout en maintenant la volonté de vouloir utiliser ce même organe, il a été prévu de pouvoir rigidifier son système de fixation en recourant à l'introduction d'une vis, d'une goupille ou d'un rivet, au travers du perçage 30. Dans ce cas, la fixation de l'organe de centrage selon l'invention ne se fait pas verticalement, comme c'est le cas dans l'état actuel de la technique, mais horizontalement grâce au concours d'une vis venant se serrer dans l'épaisseur de l'outil plan, parallèlement au plan de ce dernier. Ce mode de fixation supplémentaire présente l'avantage de n'occuper aucune place à la surface de l'outil plan pour être mis en oeuvre.According to the number of poses to cut and according to their arrangement on the sheet within the physical limits of the planar tool, it may sometimes be that the edge of the sheet should encroach on a small part of the square initially reserved for the arrangement of the centering member. In this case, it can happen that we have to trim a part of this organ in order to ensure, for example, correct ejection of waste slightly overflowing on the surface of opening 42. However, if the centering member is amputated by too large a portion, his fixation system risks becoming deficient and no longer able to be operational or sufficiently reliable to guarantee a lasting fixation. For alleviate this eventuality while maintaining the will to want to use this same body, provision has been made to be able to stiffen its fixing system by using the introduction of a screw, pin or rivet, through the drilling 30. In this case, the fixing of the centering member according to the invention is not done vertically, as is the case in the current state of technical, but horizontally thanks to the help of a tightening screw in the thickness of the planar tool, parallel to the plane of the latter. This mode of additional fixing has the advantage of occupying no place at the surface of the planar tool to be used.

Une variante de la présente invention pourrait consister à modifier la forme générale de l'organe de centrage afin de réduire davantage la place occupée à la surface de l'outil tout en conservant le mode de fixation par encliquetage. A ce propos, il convient aussi de mentionner que la forme du bossage 20, et plus particulièrement celle du tronc 21 et/ou de la tête 22, pourrait aussi présenter un aspect fort différent de celui donné en exemple dans les figures 1 et 2, sans porter préjudice au mode de fixation présenté. De cette possibilité, on mentionnera aussi que la forme de l'ouverture 42 pourrait être également sujette à des adaptations. Il en va bien sûr de même pour ce qui est du bossage 10 et l'échancrure 43 correspondante.A variant of the present invention could consist in modifying the general shape of the centering member to further reduce space occupied on the surface of the tool while retaining the method of attachment by snap. In this regard, it should also be mentioned that the shape of the boss 20, and more particularly that of the trunk 21 and / or of the head 22, could also present a very different aspect from that given as an example in Figures 1 and 2, without prejudice to the method of attachment presented. Of this possibility, it will also be mentioned that the shape of the opening 42 could also be subject to adaptations. The same goes of course for this which is the boss 10 and the corresponding notch 43.

Selon un mode de réalisation préféré, l'organe de la présente invention vise à être inséré dans l'outil plan 40 de façon à ce que l'embase 2 apparaisse préférentiellement au-dessus de la surface supérieure de cet outil. Toutefois, il serait également possible de faire en sorte que cette embase soit noyée dans l'épaisseur de l'outil ou soit tournée à l'envers pour prendre appuis contre la face inférieure de ce dernier.According to a preferred embodiment, the organ of the present invention aims to be inserted into the planar tool 40 so that the base 2 preferably appears above the upper surface of this tool. However, it would also be possible to ensure that this base is embedded in the thickness of the tool or turned upside down to gain support against the underside of the latter.

L'organe de centrage tel que décrit ici comprend un seul bossage 20 de préhension. Cependant, rien n'empêche de prévoir plusieurs moyens de préhension s'insérant dans autant d'ouvertures 42 ou de transformer le bossage 10 en un bossage de fixation au travers de l'échancrure 43.The centering member as described here comprises a single boss 20 gripping. However, nothing prevents the provision of several means of grip fitting into as many openings 42 or transforming the boss 10 into a fixing boss through the notch 43.

De nombreuses améliorations peuvent encore être apportées à cet organe dans le cadre des revendications.Many improvements can still be made to this organ within the scope of the claims.

Claims (10)

Organe (1 ) de centrage d'un outil plan (40), pour une machine de production d'emballages, caractérisé en ce qu'il comprend des moyens (20, 21, 22) permettant sa fixation à demeure dans au moins une ouverture (42) ménagée dans l'une des faces de l'outil plan (40) sans l'adjonction d'aucune pièce mécanique de fixation et sans l'adjonction d'aucune substance ou élément adhésif.Organ (1) for centering a flat tool (40), for a packaging production machine, characterized in that it comprises means (20, 21, 22) allowing it to be fixed permanently in at least one opening (42) formed in one of the faces of the planar tool (40) without the addition of any mechanical fixing part and without the addition of any substance or adhesive element. Organe (1) selon la revendication 1, caractérisé en ce qu'il comprend au moins un bossage (20) composé d'un tronc (21) surmonté d'une tête (22) constituant à la fois une partie proéminente et un moyen de préhension interagissant directement avec l'outil plan (40).Body (1) according to claim 1, characterized in that it comprises at least one boss (20) composed of a trunk (21) surmounted by a head (22) constituting both a prominent part and a means of grip interacting directly with the planar tool (40). Organe (1) selon la revendication 2, caractérisé en ce qu'une saignée (26) est située à la jointure du tronc (21) et de la tête (22), conférant à cette dernière une élasticité mécanique par rapport au reste du bossage (20).Body (1) according to claim 2, characterized in that a groove (26) is located at the junction of the trunk (21) and the head (22), giving the latter mechanical elasticity with respect to the rest of the boss (20). Organe (1) selon la revendication 3, caractérisé en ce que la tête (22), insérée dans l'ouverture (42), possède une hauteur telle qu'elle est noyée dans l'épaisseur de l'outil plan (40) ou n'émerge que partiellement hors de l'une des faces de cet outil.Body (1) according to claim 3, characterized in that the head (22), inserted in the opening (42), has a height such that it is embedded in the thickness of the planar tool (40) or only partially emerges from one of the faces of this tool. Organe (1) selon la revendication 4, caractérisé en ce que ladite tête (22) comprend au moins une saillie (23) exerçant une force de friction dirigée vers l'extérieur de l'outil plan (40), dans le plan de ce dernier.Body (1) according to claim 4, characterized in that said head (22) comprises at least one projection (23) exerting a friction force directed towards the outside of the planar tool (40), in the plane of this latest. Organe (1) selon la revendication 3, caractérisé en ce que la tête (22), insérée dans l'ouverture (42), possède une hauteur telle qu'elle émerge totalement hors de l'une des faces de l'outil plan.Body (1) according to claim 3, characterized in that the head (22), inserted in the opening (42), has a height such that it emerges completely from one of the faces of the planar tool. Organe (1 ) selon la revendication 6, caractérisé en ce que ladite tête (22) comprend au moins une saillie (23) terminée par une arête (25) prenant appuis contre l'une des faces de l'outil plan (40).Body (1) according to claim 6, characterized in that said head (22) comprises at least one projection (23) terminated by an edge (25) bearing against one of the faces of the planar tool (40). Organe (1) selon la revendication 4 ou 6, caractérisé en ce que le tronc (21) du bossage (20) est tel qu'il s'insère sans jeu dans l'ouverture (42).Body (1) according to claim 4 or 6, characterized in that the trunk (21) of the boss (20) is such that it fits without play in the opening (42). Organe (1) selon la revendication 2, caractérisé en ce que ledit bossage (20) est percé d'un trou (30) horizontal.Body (1) according to claim 2, characterized in that said boss (20) is pierced with a horizontal hole (30). Organe (1) selon la revendication 2, caractérisé en ce que le tronc (21) est un parallélépipède droit et la tête (22) présente une forme trapézoïdale.Body (1) according to claim 2, characterized in that the trunk (21) is a straight parallelepiped and the head (22) has a trapezoidal shape.
EP03018072A 2002-08-22 2003-08-08 Centering means for a planar tool Withdrawn EP1391277A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14422002 2002-08-22
CH14422002 2002-08-22

Publications (2)

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EP1391277A2 true EP1391277A2 (en) 2004-02-25
EP1391277A3 EP1391277A3 (en) 2005-08-17

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EP03018072A Withdrawn EP1391277A3 (en) 2002-08-22 2003-08-08 Centering means for a planar tool

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EP (1) EP1391277A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH695444A5 (en) * 2002-03-28 2006-05-31 Bobst Sa Body support, attachment and building plan tool used in station ejection waste of press cutting.

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EP0355673A1 (en) * 1988-08-16 1990-02-28 Delkeskamp Kg Stamping press, in particular a flat-bed stamping press
DE9013010U1 (en) * 1990-07-28 1990-12-06 Meurer Nonfood Product GmbH, 7760 Radolfzell Device for processing cardboard sheets or similar sheet material
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EP0756919A1 (en) * 1995-07-29 1997-02-05 Jürgen Zimmel Apparatus for punching a web-like or a sheet-like material
US5730039A (en) * 1994-08-19 1998-03-24 South Eastern Die Company, Inc. Method and apparatus for adjusting the position of a cutting plate
CH691035A5 (en) * 1995-04-18 2001-04-12 Bobst Sa Tool for machine cutting of plate members, and associated equipment.

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US354971A (en) * 1886-12-28 Rivet
US3106759A (en) * 1959-12-14 1963-10-15 Bendix Corp New and improved fastening means
GB1585015A (en) * 1978-02-22 1981-02-18 Mez G Connection member for the connection of two panels of sheet metal
CH681874A5 (en) * 1990-04-10 1993-06-15 Bobst Sa

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Publication number Priority date Publication date Assignee Title
US4494455A (en) * 1982-05-18 1985-01-22 Bobst S.A. Device for preparing die members of a platen press
EP0355673A1 (en) * 1988-08-16 1990-02-28 Delkeskamp Kg Stamping press, in particular a flat-bed stamping press
DE9013010U1 (en) * 1990-07-28 1990-12-06 Meurer Nonfood Product GmbH, 7760 Radolfzell Device for processing cardboard sheets or similar sheet material
US5197367A (en) * 1991-10-04 1993-03-30 Southeastern Die Company, Inc. Steel rule die retaining board and die lock
US5730039A (en) * 1994-08-19 1998-03-24 South Eastern Die Company, Inc. Method and apparatus for adjusting the position of a cutting plate
CH691035A5 (en) * 1995-04-18 2001-04-12 Bobst Sa Tool for machine cutting of plate members, and associated equipment.
EP0756919A1 (en) * 1995-07-29 1997-02-05 Jürgen Zimmel Apparatus for punching a web-like or a sheet-like material

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EP1391277A3 (en) 2005-08-17
US20040035304A1 (en) 2004-02-26

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