EP1559521B1 - Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie - Google Patents

Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie Download PDF

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Publication number
EP1559521B1
EP1559521B1 EP04405056A EP04405056A EP1559521B1 EP 1559521 B1 EP1559521 B1 EP 1559521B1 EP 04405056 A EP04405056 A EP 04405056A EP 04405056 A EP04405056 A EP 04405056A EP 1559521 B1 EP1559521 B1 EP 1559521B1
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EP
European Patent Office
Prior art keywords
tool
lug
flat tool
rear part
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04405056A
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English (en)
French (fr)
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EP1559521A1 (de
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
Priority to AT04405056T priority Critical patent/ATE358560T1/de
Priority to EP04405056A priority patent/EP1559521B1/de
Priority to DE602004005659T priority patent/DE602004005659T2/de
Publication of EP1559521A1 publication Critical patent/EP1559521A1/de
Application granted granted Critical
Publication of EP1559521B1 publication Critical patent/EP1559521B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B26D7/18—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

Definitions

  • the present invention relates to a reinforcing member of a flat tool used in a machine intended in particular for the packaging industry, more particularly in a waste ejection station of a platen press for the manufacture of blanks of boxes from cardboard sheets, paper or synthetic materials for example.
  • a platen press comprises several stations placed one after another, including a feeder for feeding the machine sheets of cardboard from a stack, a cutting station cutting the sheets one by one following a given form for producing box blanks, an ejection station removing unwanted waste resulting from cutting, and finally a stacks receiving station shaped blanks.
  • the leaves are each apprehended at their front edge by a clip bar moving on a train of chains which takes them in turn in different stations.
  • the sheets, also called plate elements, worked by such machines generally each comprise a plurality of poses or cuts which represent the shapes and developed surfaces of the packages produced.
  • Such a station generally comprises an upper tool movable in the vertical plane and provided with ejectors, a perforated ejection board on which the sheets are successively stop to be cleared of their waste, and generally a lower tool collaborating with the upper tool for removing waste from the sheet.
  • the upper tool is in the form of a perforated board or a frame provided with several bars on which are mounted ejection needles which detach the waste from the sheet pushing them down through the openings of the ejection board.
  • the upper tool also includes pressers, constituted for example by small cubes of foam, which have the simple effect of maintaining the poses of the sheet against the upper face of the ejection board.
  • the lower tool includes telescopic ejection needles arranged opposite those of the upper tool. This arrangement makes it possible to pinch all the waste and remove it from the sheet in a single operation through the ejection board.
  • Such an ejection station is illustrated and described in more detail in patent CH689974.
  • the ejection board is subjected to high vertical pressures because the waste, being no longer pinched to be removed, must rest partially on the edges of the opening provided for their ejection in order to Above all, bend downwards to break all the points of attachment at the same time. Without such positioning of the sheet, some attachment points may not be broken, leaving the waste then hanging through the openings of the board and cause an inevitable jamming during the evacuation of the sheet out of the station. 'ejection.
  • the solution to pinch the waste between an upper tool and a lower tool thus ensures, at very high speed, a perfect elimination of all waste from the sheet without any jam.
  • a tool also called ejection board that the object of the present invention finds its use mainly.
  • the upper and lower tools, as well as the ejection board, are generally each arranged and fixed on a support frame which can be easily extracted from the ejection station in the horizontal plane in the manner of a drawer. Intended to support only the poses of the sheet while allowing the removal of waste, the ejection board only rarely has straight edges but has irregular edges that reproduce the contours of the poses located on the periphery of the sheet. Therefore, the ejection board can not be directly fixed in its carrier frame by its edges, but needs to be mounted on longitudinal bars adapted to be placed and held in the carrier frame by their ends.
  • bearing bars generally have a rectangular section, the longer sides are oriented vertically to benefit from greater flexural rigidity. They are fixed against the underside of the ejection board by screwed brackets on the one hand against the flanks of these bars, and on the other hand in the board in question.
  • Patent CH575294 illustrates this mode of arrangement in FIGS. 2 and 3.
  • This embodiment has several disadvantages that for their fixing, these bars require a multitude of small parts (brackets and screws) that require drilling, fitting and assembly relatively long.
  • this embodiment occupies on the surface of the ejection board a certain non-negligible place necessary for fastening brackets.
  • these parts are generally recovered as the brackets.
  • each ejection board is specific to a specific job, the recovery of such parts requires disassembly work that only increases the cost of performing a given task.
  • it has already been thought to replace the generally metallic reinforcement bars with bars of another cheaper material that can be glued like wood.
  • this material requires in part a larger dimensioning of the thickness of the reinforcement bars.
  • This oversizing has the disadvantage of occupying more space on the surface of the ejection board and therefore it also becomes more difficult to have such bars on the ejection board while avoiding all openings for the ejection of waste so as not to obstruct it.
  • the ends of the load-bearing bars generally have a tapered shape, machined so that they can come into engagement with the fastening system provided on the carrier frame of the station for which it is intended. Gold, when these bars are wood, the tapered profile of their ends weakens the latter which become delicate and require special attention when handling. Finally, because of their rapid wear, in-shop tests have also shown that such ejection boards quickly tend to be prone to progressive vibrations during prolonged use.
  • EP 1'348'524 relates to a reinforcing bar which has on its upper edge a plurality of fixing heads that can be inserted into openings arranged in the ejection board.
  • the assembly of such a bar on the ejection board is effected by exerting pressure on the bar until the fixing heads fit correctly into the corresponding openings.
  • the fixing heads being each provided with a pair of claws whose shape pronounced of a hook, this method of assembly allows for permanent fixing without the addition of any additional piece attached to the flanks of the closed off.
  • the disadvantage of this member lies in the fact that once inserted into the ejection board, the reinforcement bar can no longer be removed; this method of fixing being permanent, definitive and disposable.
  • Each new work of shaping a sheet in a platen press requires, for the different stations, specific tools that are directly related to the shape of the poses to be made.
  • the cost of manufacturing packaging is increased by the short period of use of specific plan tools that can not be exchanged even for series that slightly different.
  • the value of a reinforcing busbar for a plane tool represents approximately 25% of the selling price of the ejection board. Proportionally, we therefore see that the cost of such reinforcing bars is not negligible compared to the cost of the plan tool. As a result, it is understood that it would be desirable to be able to recover these bars in order to reuse them for other flat tools.
  • Another disadvantage of this member lies in the fact that it is necessary to use an additional tool, such as a hammer or a mallet, to be able to properly push the reinforcing bars in the plane tool. Because of the shape of the claws, which include protruding parts fitting into the flanks of the openings of the ejection board, it is indeed necessary to apply a certain force to succeed in correctly plating the upper edge of the bar against the surface of the plane tool. This force is even greater than the number of fixing head is high and depends directly on the machining tolerance between the overall width of the claws and that of the opening in which they must be inserted.
  • the object of the present invention is to provide a member which can reinforce a flat tool in a machine intended for the manufacture of packaging, more particularly in an ejection station of a platen press, by dispensing with all aforementioned drawbacks.
  • This body must also be able to constitute a means of support and fixation of the plan tool.
  • the object of the present invention must be retrievable for later use on other flat tools, and for these purposes it must be easily and quickly mounted and removed from each planar tool. Attachment to such tools must not depend on any additional parts and must not use any adhesive substance or any other element capable of producing the same effect.
  • Another aim of the object of the present invention is to provide a member that can have a variable length adapting to any tool of conventional size.
  • the body in question must be able to benefit from a modest manufacturing cost compared to the cost price of the tool plane for which it is used and in relation to its life, namely unlimited use until the breaking of an element that composes it.
  • Figures 1a and 1b illustrate, in elevational views, the member 1 of the present invention in a so-called open position on a flat tool 2 shown in section.
  • the representation of the member 1 is illustrated in two portions, respectively in Figures 1a and 1b.
  • Figure 1a shows the front portion 10 of the member 1 as well as its central portion 30 in partial section
  • Figure 1b shows the rear portion 40 intended to fit into the central portion 30.
  • the general shape of the 1 member is preferably that of a straight bar narrow profile, disposed on its upper edge 3 against the lower surface 4 of the plane tool 2.
  • the latter can be typically an ejection plate of a non platinum press illustrated.
  • the front part 10 comprises in particular a body 11 provided with a mechanism 20 which makes it possible to fix the member 1 on the flat tool 2 by passing from a so-called open position to a so-called closed position, and conversely allows it to be removed for separate it from the plane tool 2.
  • Fixing the member 1 is done by means of at least one fixed pin 12 and at least one movable pin 13, all integral with the member 1 and each intended to engage with a flank 5 of a opening 6 provided for this purpose in the plane tool 2.
  • Each of these pins has a sharp or pointed end that can be plant easily in wood for example.
  • the fixed pin 12 is turned towards the rear and consists of an outgrowth of the body 11 located at the rear end of the latter, against the upper edge 3.
  • the movable pin 13 is as for him turned towards the front so that it points in the opposite direction to that of the fixed pin 12.
  • the movable pin 13 can move in the longitudinal direction and constitutes the upper part of a yoke 14 mounted to tilt about an axis 15 passing through the body 11 of the member 1, as illustrated in particular in Figure 3.
  • the longitudinal movement of the movable pin 13 is obtained by the action of the mechanism 20 which, in the open position, returns the stirrup 14 in a preferentially vertical orientation as illustrated in FIG. 1a, and in the closed position, as illustrated. in FIG. 2, the force to be tilted forwards about its axis of rotation 15 so that the mobile pin 13 can come to grip the plane tool 2, by fitting into the sidewall 5 of the corresponding opening 6.
  • the closing and opening mechanism 20 comprises a bent handle 21, acting as a lever, connected at one of its ends to a rod 23 by a first hinge 22 and connected at its end to the end. a bar 24 by a second articulation 25.
  • this bar 24 also acts as a lever and bears at its opposite end at the bottom of a slot 16 formed in the body 11 of the member 1.
  • the rod 23 passes through the stirrup 14 and slides longitudinally in an embrasure 17 formed for this purpose in the body 11 of the member 1.
  • This rod 23 comprises, between the first articulation 22 and the stirrup 14, a scope around which takes place an elastic means 27, illustrated in Figures 1a, 2 and 4 by a compression spring.
  • This elastic means, or compression spring is supported at the rear against a shoulder 28 of the rod 23, and at the front against the stirrup 14 by pushing the latter until it abuts against a pin of stop 29 fixed transversely through the rod 23.
  • the movable pin 13 is pushed both by the action of the bent handle 21, when it is closed, and by the action of the elastic means 27.
  • At least one fin 18 is reported therein for the purpose to constitute a small additional support surface leaning against the lower surface 4 of the planar tool 2.
  • the member 1 can be apprehended by the tracking and clamping device, not shown but provided in the platen press to properly maintain the plane tool 2 in the machine, at least one end 19 of this member 1 is profiled accordingly.
  • Figure 1b illustrates the rear portion 40 of the member 1 of the present invention.
  • This rear portion detachable from the rest of the member 1 without being a necessity, is movable in the longitudinal direction relative to the front portion 10, preferably by sliding. To this end, it consists in particular of a sliding portion 41 and a tail 42.
  • the sliding portion 41 slides along the central portion 30 of the member 1.
  • the central portion 30 is a tubular portion whose inner dimensions are slightly greater than the outer dimensions of the sliding portion 41.
  • the tail 42 is provided with a lug 43 facing forward and of similar or identical shape to that of the fixed lug 12 described above.
  • the lug 43 is preferably fixed and its function is also identical to that of the fixed lug 12.
  • the tail is also provided with a fin 18 for stabilizing the member 1.
  • this tail is also provided with a fastening mechanism 20 identical to that previously described in the front portion 10.
  • the rear portion 40 of the body of the present invention comprises a stopper 45 against which can abut a clamping member, specific to the packaging machine, pushing the rear portion 40 in the longitudinal direction.
  • a transverse bar of this machine is slid on a plate 44 arranged at the end of the tail 42, on the lower edge 7 of the member 1.
  • This bar not shown because part of a device of external attachment to the present invention, constitutes the clamping member that keeps the plane tool 2 in the machine.
  • this transverse bar will therefore push the tail 42 of the member 1 forward, so that the pin 43 is set in the flank 5 of the corresponding opening 6 and thus drives the entire plane tool 2 in the same direction until it can be grasped in the machine by the end 19.
  • the use of the organ 1 of the present invention has the advantage of being simple, fast and reliable.
  • To set up and fix this member simply insert the lugs 12, 13 of the front portion 10 into the corresponding openings 6 of the flat tool 2, adjust the length of the member 1 by sliding the rear portion 40 along the central portion 30 until the lug 43 of the tail 42 also slides in an opening 6, to press the upper edge 3 of the member 1 against the lower surface 4 of the plane tool, and lower the bent handle 21 to close the fastening mechanism 20.
  • the reverse sequence of these operations makes it possible to remove the organ as easily from its planar tool.
  • the introduction and removal of the member 1 does not require any additional tool, nor any other mechanical part.
  • the joints 22, 25, the axis 15 and the locking pin 29 may for example be made by means of simple elastic pins.
  • the cutting of the shapes of the front and rear portions 40 may advantageously be laser-machined, as may the light 16 and the embrasure 17 in particular.
  • the tubular shape of the central portion 30 can be obtained by folding and welding a plate provided for this purpose.
  • the assembly of the front and central parts, as the assembly of the fins 18, can also be achieved simply by welding. Therefore, it will be noted that the cost of producing such a reinforcing member can be reduced to a minimum without detracting from the strength it requires.
  • the openings 6 are preferably of square or rectangular shape and that their flanks are preferably vertical but could be slightly inclined or have a particular profile.
  • the machining of the openings 6 can be performed very easily by means of a laser, especially when the flat tools are made of wood as is generally the case. This machining mode makes it possible to obtain a clean and precise cut while respecting tolerances sufficient for such an application.
  • the member 1 is certainly fixed without play in the plane tool 2.
  • the openings 6 therefore do not require close tolerances, which advantageously contributes to reduce manufacturing costs.
  • the lugs 12, 13, 43 are advantageously all embedded in the thickness e of the plane tool 2 and therefore do not emerge from the upper surface 8 of the planar tool 2.
  • This preferred arrangement avoids the presence of protruding parts on the upper surface 8 of the planar tool, and thus eliminates any risk of snagging with moving machine members in the platen press as the clip bars scroll precisely along this upper surface.
  • such an arrangement also avoids any risk of injury to the machinist who must handle such flat tools, especially during operations such as changes of these tools during the preparation of the machine.
  • the mechanism 20 of the front portion 10 is preferably reproduced in the rear portion 40 of the member 1, it is not excluded to be able to have this mechanism only in the front part or in the rear part of the body 1 , or at another place along the organ 1.
  • the constituent elements of the member 1 are preferably made of metal, such as steel or aluminum, without this being a necessity.
  • the general profile of the member 1 is of rectangular section and its thickness depends essentially on the rigidity of the material used, the maximum length that can have the member 1, as well as the effort that must be taken up by the tool plane 2 in order to be able to at least resist the strongest constraint for which it was dimensioned.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Making Paper Articles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (10)

  1. Organ (1) zum Verstärkung eines flachen Werkzeugs (2), welches die Dicke (e) aufweist und mit Öffnungen (6) versehen ist, von denen jede eine Seitenfläche (5) aufweist, welches dazu bestimmt ist, in einer insbesondere für die Verpackungsindustrie bestimmten Maschine verwendet zu werden, dadurch gekennzeichnet, dass es zumindest einen unbeweglichen Vorsprung (12) und zumindest einen beweglichen Vorsprung (13) einschliesst, der in einer zur Richtung des unbeweglichen Vorsprungs entgegengesetzten Richtung ausgerichtet ist und mittels eines Mechanismus (20) in Bewegung gesetzt wird, der das Befestigen und Lösen des Organs (1) am bzw. vom flachen Werkzeug (2) mittels der Vorsprünge (12, 13) zulässt, von welchen jeder dazu bestimmt ist, mit der Seitenfläche (5) einer der Öffnungen (6) in Eingriff zu treten, die zu diesem Zweck im flachen Werkzeug (2) angeordnet sind.
  2. Organ (1) gemäss Anspruch 1, dadurch gekennzeichnet, dass es eine längliche Form aufweist, deren Geometrie an jene eines geradlinigen Balkens erinnert.
  3. Organ (1) gemäss Anspruch 2, dadurch gekennzeichnet, dass es ein schmales Profil aufweist, welches eine obere Kante (3) festlegt, die mit einer unteren Fläche (4) des flachen Werkzeugs (2) in Kontakt tritt.
  4. Organ (1) gemäss Anspruch 1, dadurch gekennzeichnet, dass der unbewegliche Vorsprung (12) und der bewegliche Vorsprung (13) in der Dicke (e) des flachen Werkzeugs (2) versenkt sind.
  5. Organ (1) gemäss einer der vorstehenden Ansprüche, dadurch gekennzeichnet, dass es eine variable Länge aufweist und zumindest einen vorderen Teil (10) und einen hinteren Teil (40) aufweist, die relativ zueinander in Längsrichtung verlagerbar sind.
  6. Organ (1) gemäss Anspruch 5, dadurch gekennzeichnet, dass der hintere Teil (40) entlang eines mit dem vorderen Teil (10) verbundenen, mittleren Teils (30) gleitet.
  7. Organ (1) gemäss einer der Ansprüche 5 oder 6, dadurch gekennzeichnet, dass sein hinterer Teil (40) einen Anschlag (45) einschliesst, gegen welchen sich ein der Maschine zugehörendes Verriegelungsorgan anlegen kann, welches den hinteren Teil (40) des Organs (1) derart in Längsrichtung schiebt, dass zumindest ein mit diesem hinteren Teil (40) verbundener Vorsprung (43) in die Seitenfläche (5) der entsprechenden Öffnung (6) des flachen Werkzeugs (2) eingreift.
  8. Organ (1) gemäss Anspruch 5, dadurch gekennzeichnet, dass der Mechanismus (20) im vorderen Teil (10) und/oder im hinteren Teil (40) angeordnet ist.
  9. Organ (1) gemäss einer der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der bewegliche Vorsprung (13) mittels des Mechanismus (20) in Längsrichtung in Bewegung gesetzt wird, der in einer geschlossenen Stellung den beweglichen Vorsprung (13) in die Seitenfläche (5) der Öffnung (6) schiebt und in einer geöffneten Stellung den beweglichen Vorsprung (13) gegen ein elastisches Mittel (27) aus der Seitenfläche (5) zurückzieht.
  10. Organ (1) gemäss einer der Ansprüche 3 bis 9,dadurch gekennzeichnet, dass es zumindest einen Stabilisierungsflügel (18) einschliesst, der derart gegen das Organ (1) angeordnet ist, dass er sich gegen die untere Fläche (4) des flachen Werkzeugs (2) anlegen kann.
EP04405056A 2004-01-30 2004-01-30 Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie Expired - Lifetime EP1559521B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT04405056T ATE358560T1 (de) 2004-01-30 2004-01-30 Verstärkungselement für flache werkzeuge in einer machine für die verpackungsindustrie
EP04405056A EP1559521B1 (de) 2004-01-30 2004-01-30 Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie
DE602004005659T DE602004005659T2 (de) 2004-01-30 2004-01-30 Verstärkungselement für flache Werkzeuge in einer Maschine für die Verpackungsindustrie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405056A EP1559521B1 (de) 2004-01-30 2004-01-30 Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie

Publications (2)

Publication Number Publication Date
EP1559521A1 EP1559521A1 (de) 2005-08-03
EP1559521B1 true EP1559521B1 (de) 2007-04-04

Family

ID=34639503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405056A Expired - Lifetime EP1559521B1 (de) 2004-01-30 2004-01-30 Verstärkungselement für flache Werkzeuge in einer Machine für die Verpackungsindustrie

Country Status (3)

Country Link
EP (1) EP1559521B1 (de)
AT (1) ATE358560T1 (de)
DE (1) DE602004005659T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4626661A1 (de) 2022-12-02 2025-10-08 Bobst Mex Sa Stützvorrichtung und kartonverarbeitungsmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB469122A (en) * 1936-01-25 1937-07-20 Hoe & Co R Improvements in or relating to type forms or chases
GB857265A (en) * 1957-02-05 1960-12-29 William Frank Golding Holder for sheet material working tools
GB2337224A (en) * 1998-04-16 1999-11-17 Ralegh Limited Die cutting apparatus
CH695444A5 (fr) * 2002-03-28 2006-05-31 Bobst Sa Organe de support, de fixation et de renforcement d'un outil plan utilise dans une station d'ejection de dechets d'une presse a decouper.

Also Published As

Publication number Publication date
EP1559521A1 (de) 2005-08-03
ATE358560T1 (de) 2007-04-15
DE602004005659D1 (de) 2007-05-16
DE602004005659T2 (de) 2007-12-13

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