EP0369498A2 - Holding device - Google Patents

Holding device Download PDF

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Publication number
EP0369498A2
EP0369498A2 EP89202493A EP89202493A EP0369498A2 EP 0369498 A2 EP0369498 A2 EP 0369498A2 EP 89202493 A EP89202493 A EP 89202493A EP 89202493 A EP89202493 A EP 89202493A EP 0369498 A2 EP0369498 A2 EP 0369498A2
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EP
European Patent Office
Prior art keywords
brake
clamping
locking claw
ratchet
pin
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.)
Granted
Application number
EP89202493A
Other languages
German (de)
French (fr)
Other versions
EP0369498A3 (en
EP0369498B1 (en
Inventor
Rolf Lerch
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.)
Maschinenfabrik Goebel GmbH
Original Assignee
Maschinenfabrik Goebel GmbH
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Publication date
Application filed by Maschinenfabrik Goebel GmbH filed Critical Maschinenfabrik Goebel GmbH
Publication of EP0369498A2 publication Critical patent/EP0369498A2/en
Publication of EP0369498A3 publication Critical patent/EP0369498A3/en
Application granted granted Critical
Publication of EP0369498B1 publication Critical patent/EP0369498B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/10—Expanding
    • Y10T279/1074—Rotary actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/10—Expanding
    • Y10T279/1074—Rotary actuator
    • Y10T279/1079—Clutch or self-actuating type

Definitions

  • the proposed device relates to the releasable holding of core tubes, rolls of paper, foil, plastics, metals, fabrics or the like with at least two displaceable or changeable in their radial positions on at least one profile piece or the like Clamping segments.
  • Devices of the aforementioned type are usually used to support sleeves in web-processing machines in such a way that webs of paper, foil, metals, plastics, fabrics or the like wound on these sleeves, core tubes or the like are unwound from these sleeves can to run to a processing machine.
  • Such devices can also be used to rotatably support core tubes or sleeves on which such webs can be wound coming from a processing machine.
  • the rolls in the machine must be able to be held so that they can be rotated centrically as precisely as possible.
  • so-called expansion clamping shafts or expansion clamping heads are often used, in which any components are moved in the radial direction of the entire device, for example can that the core tubes can either be tensioned from the inside or loosened as desired and removed from the rest of the machine.
  • clamping heads which are movable in the radial direction for clamping or releasing, are often moved along somewhat oblique, that is to say essentially wedge-shaped, paths, in order in this way to be able to be displaced either into the so-called clamping position or into the so-called releasing position.
  • a device for releasably holding core tubes in which a plurality of eccentrics are arranged in such a way that, in the event of a relative rotation between the essentially internal device and the clamping elements movable in the radial direction of the device, the clamping elements are then radial be moved when the eccentric assigned to the respective clamping element is rotated accordingly.
  • this device contains at least two radially displaceable clamping segments or clamping elements which are attached to their carrier in such a way that they can be clamped in an extreme position.
  • Roller sleeves, core tubes or the like, which are used in processing machines, that is to say are rotatably held therein, are however often subjected to changing forces.
  • This object is achieved by an effective brake in each radial position of the clamping segments, counteracting a displacement of each clamping segment, a movable locking claw fixed in the immediate vicinity of the machine frame, a pin, a ratchet or the like and an adjacent one on the outside of the holding device , the pin, the ratchet, pawl or the like. It is also proposed that the pin, the ratchet, the locking claw or the like can be released if necessary, for which purpose at least one electromagnet, pressure medium cylinder or the like can be used per pin, ratchet, locking claw or the like.
  • the brake used can be a friction brake with at least one friction lining, preferably a multi-disk brake, wherein the friction linings can be arranged concentrically with the drive shaft.
  • a tensioning device is created with a simple, robust and inexpensive construction, with which core tubes, sleeves, rollers or the like can also be automatically held sufficiently when the roller or its holder is in operation device should act only low tensile forces on the part of the web to be wound or unwound or also forces that could ultimately lead to an undesired release of the tensioning device.
  • Such forces could occur, for example, by changing the tension to which the web-like material is subject, for example at the beginning or at the end of an acceleration process, or also during the so-called emergency stop, that is to say a particularly powerful braking process.
  • a (drive) shaft 2 is rotatably held in a known housing part 1, a swivel arm for holding coiled rolls or the like, or some other type of appropriate holder with the aid of bearings 3 and 4.
  • a rotating part 5 At the left end of the shaft 2 in FIG. 2 there is a rotating part 5, which can consist of the same component as the shaft 2.
  • a flange 6 is connected to the rotating part 5.
  • the proposed device can therefore be analogous to that of our earlier patent application P 37 00 472.7, to which reference is made for the purpose of supporting the description and for further explanation.
  • the rotating part 5 rotates together with the shaft 2. It can have a circular cross section or any other appropriate cross section, for example a so-called multi-spline profile.
  • end of the rotating part 5 are radial, i. H. in Figure 2, for example, upward or downward adjustable clamping segments 7 are attached.
  • the proposed device also has guide pieces 8, with the aid of which the clamping segments or parts of the clamping segments 7 can be guided both in the radial and in the circumferential direction. All guide pieces 8 are fastened, for example, with the aid of screws 9 to an annular disk 10, which in turn is pushed onto the flange 6 in such a way that it can be turned relative to it. In this way, it is possible to move the clamping segments 7 radially, ie in the direction of the arrow 12, by rotating the shaft 2 and correspondingly rotating the profile piece (s) 11 firmly connected to the shaft 2 with guide pieces 8 secured against rotation. In this way, the respective core tube 13, the sleeve, the wound roll or the like can be gripped and held from the inside by the tensioning segments 7. In addition, with the aid of known retraction devices, not shown, it is possible to move the tensioning segments 7 back in the direction of the arrow 12 towards the inside of the device in order to release the core tubes or the like again, if this should be desired.
  • the disc 10 is connected to an annular disc 15 by means of screws 14. Between the disk 10 and the washer 15, a further ring 16 is inserted into a corresponding recess, for example the washer 15, which is connected to the shaft 2 in a rotationally fixed manner and can rotate together with it.
  • This connection can take place, for example, in that a pin 17 is inserted radially into the shaft 2 and is fastened therein, which engages in a corresponding recess 18 located on the ring 16.
  • a simple coupling is created which allows the ring 16 to be rotated by and with the shaft 2 as it rotates, on the other hand in the axial direction, i. H. in the direction of arrow 19, relative to the shaft 2 is movable within limits.
  • a clutch lining 20 is inserted between the ring 16 and the annular disk 15. Both a clutch ring 21 and a pressure plate 22 are inserted between the ring 16 and the disk 10.
  • the dimensions of the clutch lining 20 and the clutch ring 21 and their materials are preferably identical to one another.
  • bores 23 are machined parallel to the direction of the arrow 19, in which compression springs 24 are located.
  • Each compression spring 24 presses the clutch with the interposition of the pressure disk 22 lungsring 21 against the ring 16, while this presses on the clutch disc 20 on the washer 15.
  • a brake preferably a multi-disc brake with concentric to the drive shaft 2, consisting of the clutch lining 20 and the clutch ring 21 friction linings, which counteracts a relative movement of the shaft 2 and the clamping segments 7.
  • the resulting inhibition occurs not only at a certain radial position of the clamping segments 7 or a clamping segment 7, but at any radial position of the clamping segments 7.
  • the brake consisting of the clutch linings and their associated parts and the braking forces caused by the compression springs 24 must be overcome.
  • These braking forces can be selected or adjusted during assembly of the device in such a way that the tensioning segments 7 cannot undesirably slide radially inwards due to vibrations, acceleration or deceleration forces in the machine. In this way it is prevented that the core tube 13, the wound roll or the like is not loosened undesirably during the operation of the device.
  • a toothing 25 is preferably incorporated obliquely into the washer 15.
  • a locking claw 26, which corresponds to the toothing can intervene if necessary in that it is moved by an electromagnet 27 or a pressure medium cylinder in the direction of the arrow les 28 can be moved. If, for example, the locking claw 26 is shifted to the left in FIG. 2, then the locking claw 26 engages in the toothing 25 and prevents the annular disk 15 and thus the entire, exciting and engaging device that engages the core tube or the sleeve 13 from rotating.
  • the electromagnet 27 or a pressure medium cylinder corresponding to this is fixedly attached to the housing part 1.
  • a toothing 25 another device can be selected that is able to temporarily prevent the clamping device in question from rotating. This can be done, for example, by means of a parking brake, or else in that instead of a locking claw 26, a simple round pin can be inserted into a corresponding hole made in the annular disk 15. If the annular disc 15 is prevented from rotating, for example by means of a locking claw 26 which is engaged in the toothing 25, the shaft 2 can be rotated against the brake represented by the clutch lining 20 and the clutch ring 21 or the forces caused by them when a corresponding torque is introduced.
  • the proposed device now makes use of the idea of using the torque already available per se for the tensioning process, which makes it possible, on the one hand, to automatically tension when the locking claw 26 is pushed in, ie in such a way that human assistance for this process is no longer necessary, and that on the other hand the drive torque available per se is also used for the process of gripping and tensioning the core tubes.
  • the locking claw 26 is in turn attached in the immediate vicinity of the holding device to the housing part 1, the pivotable holding arm or the like, so that the path for snapping into the receiving device formed by the toothing for the locking claw 26 is very short.
  • the locking claw 26 can be released either by displacement in the direction of the arrow 28 relative to the housing part 1 or else in that a correspondingly differently arranged device, which can be pivoted, for example, about a fixed pivot point, pivots out of the receiving device for the locking claw represented by the toothing 25 becomes.
  • a plurality of locking claws 26 can also be arranged around the outside of the ring disk 15, ie, since this part is generally circular, in the vicinity of the outer circumference of the ring disk 15. This more fold locking claws can then be made effective or ineffective by a single actuation, for example with the aid of a push button or a remote control pulse.

Abstract

Um Kernrohre (13) od. dgl. lösbar zu haltern, werden beliebig feststellbare Spannsegmente (7) an einer Spannvorrichtung vorgeschlagen.In order to detachably hold core tubes (13) or the like, any desired locking segments (7) are proposed on a clamping device.

Description

Die vorgeschlagene Einrichtung bezieht sich auf das lösbare Haltern von Kernrohren, von Rollen aus Papier, Folie, Kunststoffen, Metallen, Geweben od. dgl. mit mindestens zwei auf je mindestens einem Profilstück od. dgl. verschiebbaren, in ihren radialen Positionen veränder- und feststellbaren Spannsegmenten.The proposed device relates to the releasable holding of core tubes, rolls of paper, foil, plastics, metals, fabrics or the like with at least two displaceable or changeable in their radial positions on at least one profile piece or the like Clamping segments.

Einrichtungen der vorgenannten Art werden üblicher­weise dazu verwendet, um Hülsen in Bahnen verarbeiten­den Maschinen derart zu unterstützen, daß auf diese Hülsen, Kernrohre od. dgl. aufgewickelte Bahnen aus Papier, Folie, Metallen, Kunststoffen, Geweben od. dgl. von diesen Hülsen abgewickelt werden können, um einer Verarbeitungsmaschine zuzulaufen. Derartige Einrich­tungen können aber auch dazu benutzt werden, um sol­che Kernrohre oder Hülsen drehbar zu unterstützen, auf denen derartige Bahnen aus einer Verarbeitungsmaschi­ne kommend aufgewickelt werden können.Devices of the aforementioned type are usually used to support sleeves in web-processing machines in such a way that webs of paper, foil, metals, plastics, fabrics or the like wound on these sleeves, core tubes or the like are unwound from these sleeves can to run to a processing machine. Such devices can also be used to rotatably support core tubes or sleeves on which such webs can be wound coming from a processing machine.

Während des Verarbeitungsvorganges, also beispielswei­se eines Wickel- oder Abwickelvorganges müssen die in der Maschine befindlichen Rollen möglichst genau zen­trisch drehbar gehalten werden können. Am Ende eines jeden Verarbeitungsvorganges ist es jedoch erforder­lich, die Kernrohre, Hülsen od. dgl. oder aber auch die auf sie aufgewickelten Rollen aus bahnartigem Material aus der Maschine zu entfernen, wozu wiederum es erfor­derlich wird, die Kernrohre von den sie tragenden Hal­tereinrichtungen zu lösen. Um beiden Forderungen ge­rechtzuwerden, bedient man sich häufig sogenannter Ex­pansionsspannwellen oder Expansionsspannköpfe, bei de­nen irgendwelche Bauteile in radialer Richtung der ge­samten Einrichtung beispielsweise derart bewegt werden können, daß die Kernrohre entweder von ihrer Innensei­te her gespannt oder aber je nach Wunsch auch gelok­kert und aus der übrigen Maschine herausgenommen werden können. Die zum Spannen oder Lösen in radialer Rich­tung bewegbaren Teile der sog. Spannköpfe werden oft­mals entlang irgendwie schräger, also im wesentlichen keilförmiger Bahnen bewegt, um auf diese Weise entwe­der in die sogenannte Spannstellung oder in die soge­nannte Lösestellung verschoben werden zu können.During the processing process, for example a winding or unwinding process, the rolls in the machine must be able to be held so that they can be rotated centrically as precisely as possible. At the end of each processing operation, however, it is necessary to remove the core tubes, sleeves or the like or else the rolls of web-like material wound on them from the machine, for which purpose it becomes necessary to detach the core tubes from the holder devices carrying them . In order to meet both requirements, so-called expansion clamping shafts or expansion clamping heads are often used, in which any components are moved in the radial direction of the entire device, for example can that the core tubes can either be tensioned from the inside or loosened as desired and removed from the rest of the machine. The parts of the so-called clamping heads, which are movable in the radial direction for clamping or releasing, are often moved along somewhat oblique, that is to say essentially wedge-shaped, paths, in order in this way to be able to be displaced either into the so-called clamping position or into the so-called releasing position.

Aus der US-A 36 67 696 ist beispielsweise eine Vor­richtung zum lösbaren Haltern von Kernrohren bekannt, bei der mehrere Exzenter derart angeordnet sind, daß bei einer Relativverdrehung zwischen der im wesentli­chen innenliegenden Einrichtung und den in radialer Richtung der Einrichtung bewegbaren Spannelementen die Spannelemente dann radial bewegt werden, wenn der dem jeweiligen Spannelement zugeordnete Exzenter entspre­chend verdreht wird. Daneben enthält diese Einrichtung mindestens zwei radial verschiebbare Spannsegmente oder Spannelemente, die derart auf ihrem Träger angebracht sind, daß sie in einer extremen Position geklemmt wer­den können. Rollenhülsen, Kernrohre od. dgl., die in Verarbeitungsmaschinen eingesetzt werden, also darin drehbar gehalten sind, sind jedoch oftmals wechselnden Kräften ausgesetzt. Diese Kräfte können beispielsweise die Verklemmung der vorbekannten Einrichtung lösen, so daß sich die Spannsegmente der vorbekannten Einrichtung in unerwünschter Weise radial bewegen und die aufge­spannten Kernrohre daher leicht locker werden können. Daneben können mit Betätigungsringen gekoppelte End­scheiben dieser Einrichtung mit Hilfe von Befestigungs­schrauben gegen Verdrehung gesichert werden. Diese Art der Verdrehsicherung ist jedoch umständlich zu handha­ben und steht daher einer Automatisierung des Spann­ vorganges entgegen.From US-A 36 67 696, for example, a device for releasably holding core tubes is known, in which a plurality of eccentrics are arranged in such a way that, in the event of a relative rotation between the essentially internal device and the clamping elements movable in the radial direction of the device, the clamping elements are then radial be moved when the eccentric assigned to the respective clamping element is rotated accordingly. In addition, this device contains at least two radially displaceable clamping segments or clamping elements which are attached to their carrier in such a way that they can be clamped in an extreme position. Roller sleeves, core tubes or the like, which are used in processing machines, that is to say are rotatably held therein, are however often subjected to changing forces. These forces can, for example, loosen the jamming of the known device, so that the clamping segments of the known device move radially in an undesirable manner and the spanned core tubes can therefore easily become loose. In addition, end plates of this device coupled with actuating rings can be secured against rotation by means of fastening screws. However, this type of anti-rotation device is cumbersome to handle and therefore stands for automation of the clamping process contrary.

Es besteht daher die Aufgabe, die Einrichtung der vor­bekannten Art derart zu verbessern, daß sie sich bei einfacher und automatischer Bedienung nicht auf uner­wünschte Weise während des Betriebes lockern kann. Au­ßerdem soll es mit der erfindungsgemäß vorgeschlagenen Einrichtung möglich sein, Kernrohre, Hülsen, aufgewik­kelte Rollen od. dgl. auch automatisch, beispielsweise in einer Rollenschneid- und Wickelmaschine einspannen oder aus ihr herausnehmen zu können.It is therefore the task of improving the device of the known type in such a way that it cannot loosen undesirably during operation with simple and automatic operation. In addition, it should be possible with the device proposed according to the invention to be able to clamp or remove core tubes, sleeves, coiled rolls or the like automatically, for example in a roll cutting and winding machine.

Diese Aufgabe wird gelöst durch eine in jeder radialen Stellung der Spannsegmente wirksame, einer Verschiebung jedes Spannsegmentes entgegenwirkende Bremse, eine in der unmittelbaren Umgebung am Maschinengestell ortsfest befestigte bewegliche Sperrklaue, einen Zapfen, eine Ratsche od. dgl. und eine an der Außenseite der Halte­einrichtung benachbarte, dem Zapfen, der Ratsche, Sperrklaue od. dgl. entsprechende Aufnahmeeinrichtung. Außerdem wird vorgeschlagen, daß der Zapfen, die Rat­sche, die Sperrklaue od. dgl. bei Bedarf gelöst werden kann, wozu mindestens ein Elektromagnet, Druckmittelzy­linder od. dgl. je Zapfen, Ratsche, Sperrklaue od. dgl. zur Verwendung kommen kann.This object is achieved by an effective brake in each radial position of the clamping segments, counteracting a displacement of each clamping segment, a movable locking claw fixed in the immediate vicinity of the machine frame, a pin, a ratchet or the like and an adjacent one on the outside of the holding device , the pin, the ratchet, pawl or the like. It is also proposed that the pin, the ratchet, the locking claw or the like can be released if necessary, for which purpose at least one electromagnet, pressure medium cylinder or the like can be used per pin, ratchet, locking claw or the like.

Die verwendete Bremse kann eine Reibungsbremse mit min­destens einem Reibbelag, vorzugsweise eine Lamellenbrem­se sein, wobei die Reibbeläge konzentrisch zu der An­triebswelle angeordnet sein können.The brake used can be a friction brake with at least one friction lining, preferably a multi-disk brake, wherein the friction linings can be arranged concentrically with the drive shaft.

Auf diese Weise entsteht eine Spanneinrichtung mit ei­ner einfachen, robusten und kostengünstigen Bauweise, mit der Kernrohre, Hülsen, Rollen od. dgl. auch dann automatisch genügend festgehalten werden können, wenn während des Betriebes auf die Rolle oder ihre Halter­ einrichtung nur geringe Zugkräfte von seiten der auf- oder abzuwickelnden Bahn oder auch solche Kräfte ein­wirken sollten, die letzten Endes zu einem unerwünsch­ten Lösen der Spanneinrichtung führen könnten. Derar­tige Kräfte könnten beispielsweise durch Änderung der Spannung, welcher das bahnartige Gut unterliegt, auf­treten, beispielsweise zu Beginn oder am Ende eines Beschleunigungsvorganges oder auch bei dem sogenannten Nothalt, also einem besonders kräftigen Bremsvorgang. Außerdem ergeben sich insgesamt günstige Abmessungen, die eine kompakte Bauweise gestatten, so daß ein zu­sätzlicher Platzbedarf für die Bremse nicht notwendig wird.In this way, a tensioning device is created with a simple, robust and inexpensive construction, with which core tubes, sleeves, rollers or the like can also be automatically held sufficiently when the roller or its holder is in operation device should act only low tensile forces on the part of the web to be wound or unwound or also forces that could ultimately lead to an undesired release of the tensioning device. Such forces could occur, for example, by changing the tension to which the web-like material is subject, for example at the beginning or at the end of an acceleration process, or also during the so-called emergency stop, that is to say a particularly powerful braking process. In addition, there are overall favorable dimensions that allow a compact design, so that an additional space requirement for the brake is not necessary.

Anhand eines in den beigefügten Figuren schematisch abgebildeten, den Erfindungsgedanken nicht begrenzen­den Ausführungsbeispiels wird die vorgeschlagene Ein­richtung näher erläutert. In den Figuren sind im vor­liegenden Zusammenhang nicht wesentliche, dem Fachmann hinreichend bekannte Einzelheiten wegen einer übersicht­licheren Darstellungsweise nicht dargestellt. In den Figuren sind deshalb nur diejenigen Teile gezeichnet, die zur näheren Erläuterung der vorgeschlagenen Ein­richtung erforderlich sind. Einzelne Merkmale des Aus­führungsbeispiels können jeweils für sich oder zu meh­reren in beliebiger Kombination zu weiteren Ausführungs­formen der Erfindung verwirklicht sein.The proposed device is explained in more detail with reference to an exemplary embodiment schematically depicted in the attached figures, which does not limit the inventive concept. In the present context, the figures do not show any essential details that are well known to the person skilled in the art because of a clearer representation. In the figures, therefore, only those parts are drawn which are necessary for a more detailed explanation of the proposed device. Individual features of the exemplary embodiment can be implemented individually or in any combination in any combination with further embodiments of the invention.

Die einzelnen Figuren bedeuten:

  • Figur 1: Schnitt entlang Linie I/I in Figur 2
  • Figur 2: Schnitt entlang Linie II/II in Figur 1
The individual figures mean:
  • Figure 1: Section along line I / I in Figure 2
  • Figure 2: Section along line II / II in Figure 1

In einem bekannten Gehäuseteil 1, einem Schwenkarm zum Halten gewickelter Rollen od. dgl. oder einer anders­artigen zweckentsprechenden Halterung ist eine (An­triebs-)-Welle 2 mit Hilfe von Lagern 3 und 4 drehbar gehalten. An dem in Figur 2 linken Ende der Welle 2 befindet sich ein Drehteil 5, das aus dem gleichen Bau­teil wie die Welle 2 bestehen kann. Mit dem Drehteil 5 ist ein Flansch 6 verbunden. Die vorgeschlagene Ein­richtung kann daher analog zu derjenigen unserer frü­heren Patentanmeldung P 37 00 472.7 sein, auf die zum Zwecke des Stützens der Beschreibung und zur weiteren Erläuterung Bezug genommen wird.A (drive) shaft 2 is rotatably held in a known housing part 1, a swivel arm for holding coiled rolls or the like, or some other type of appropriate holder with the aid of bearings 3 and 4. At the left end of the shaft 2 in FIG. 2 there is a rotating part 5, which can consist of the same component as the shaft 2. A flange 6 is connected to the rotating part 5. The proposed device can therefore be analogous to that of our earlier patent application P 37 00 472.7, to which reference is made for the purpose of supporting the description and for further explanation.

Das Drehteil 5 läuft zusammen mit der Welle 2 um. Es kann dabei kreisförmigen Querschnitt haben oder jeden anderen beliebigen zweckentsprechenden Querschnitt, beispielsweise ein sogenanntes Vielkeilprofil. Am in Figur 2 linken Ende des Drehteils 5 sind radial, d. h. in Figur 2 beispielsweise nach oben oder nach unten verstellbare Spannsegmente 7 angebracht.The rotating part 5 rotates together with the shaft 2. It can have a circular cross section or any other appropriate cross section, for example a so-called multi-spline profile. At the left in Figure 2 end of the rotating part 5 are radial, i. H. in Figure 2, for example, upward or downward adjustable clamping segments 7 are attached.

Die vorgeschlagene Einrichtung weist daneben Führungs­stücke 8 auf, mit deren Hilfe die Spannsegmente oder Teile der Spannsegmente 7 sowohl in radialer als auch in umfangsmäßiger Richtung geführt werden können. Alle Führungsstücke 8 sind beispielsweise mit Hilfe von Schrauben 9 auf einer ringförmigen Scheibe 10 befestigt, die ihrerseits auf den Flansch 6 so aufgeschoben ist, daß sie sich ihm gegenüber verdrehen läßt. Auf diese Weise wird es ermöglicht, durch Drehung der Welle 2 und entsprechendes Drehen des oder der mit der Welle 2 fest verbundenen Profilstücke 11 bei gegen Drehung ge­sicherten Führungsstücken 8 die Spannsegmente 7 radial, d. h. in Richtung des Pfeiles 12 zu verschieben. Auf diese Weise kann das jeweilige Kernrohr 13, die Hülse, die aufgewickelte Rolle od. dgl. von innen her durch die Spannsegmente 7 ergriffen und festgehalten werden. Daneben ist es mit Hilfe nichtdargestellter bekannter Rückzieheinrichtungen möglich, die Spannsegmente 7 in Richtung des Pfeiles 12 nach dem Inneren der Einrich­tung hin zurückzubewegen, um die Kernrohre od. dgl. wieder zu lösen, falls dies erwünscht sein sollte.The proposed device also has guide pieces 8, with the aid of which the clamping segments or parts of the clamping segments 7 can be guided both in the radial and in the circumferential direction. All guide pieces 8 are fastened, for example, with the aid of screws 9 to an annular disk 10, which in turn is pushed onto the flange 6 in such a way that it can be turned relative to it. In this way, it is possible to move the clamping segments 7 radially, ie in the direction of the arrow 12, by rotating the shaft 2 and correspondingly rotating the profile piece (s) 11 firmly connected to the shaft 2 with guide pieces 8 secured against rotation. In this way, the respective core tube 13, the sleeve, the wound roll or the like can be gripped and held from the inside by the tensioning segments 7. In addition, with the aid of known retraction devices, not shown, it is possible to move the tensioning segments 7 back in the direction of the arrow 12 towards the inside of the device in order to release the core tubes or the like again, if this should be desired.

Die Scheibe 10 ist mit Hilfe von Schrauben 14 mit einer Ringscheibe 15 verbunden. Zwischen die Scheibe 10 und die Ringscheibe 15 ist ein weiterer Ring 16 in eine entsprechende Ausnehmung, beispielsweise der Ringschei­be 15 eingelegt, der mit der Welle 2 drehfest verbun­den und mit ihr zusammen umlaufen kann. Diese Verbin­dung kann beispielsweise dadurch geschehen, daß in die Welle 2 ein Zapfen 17 radial stehend eingelassen und in ihr befestigt ist, der in eine entsprechende am Ring 16 befindliche Ausnehmung 18 eingreift. Auf diese Wei­se entsteht eine einfache Kupplung, die es gestattet, daß der Ring 16 bei Umlauf der Welle 2 von dieser und mit dieser zusammen gedreht wird, andererseits in ach­sialer Richtung, d. h. in Richtung des Pfeiles 19, ge­genüber der Welle 2 innerhalb von Grenzen beweglich ist.The disc 10 is connected to an annular disc 15 by means of screws 14. Between the disk 10 and the washer 15, a further ring 16 is inserted into a corresponding recess, for example the washer 15, which is connected to the shaft 2 in a rotationally fixed manner and can rotate together with it. This connection can take place, for example, in that a pin 17 is inserted radially into the shaft 2 and is fastened therein, which engages in a corresponding recess 18 located on the ring 16. In this way, a simple coupling is created which allows the ring 16 to be rotated by and with the shaft 2 as it rotates, on the other hand in the axial direction, i. H. in the direction of arrow 19, relative to the shaft 2 is movable within limits.

Zwischen dem Ring 16 und der Ringscheibe 15 ist ein Kupplungsbelag 20 eingelegt. Zwischen dem Ring 16 und der Scheibe 10 sind sowohl ein Kupplungsring 21 als auch eine Druckscheibe 22 eingelegt. Vorzugsweise sind die Abmessungen des Kupplungsbelages 20 und des Kupp­lungsringes 21 sowie ihre Materialien einander gleich.A clutch lining 20 is inserted between the ring 16 and the annular disk 15. Both a clutch ring 21 and a pressure plate 22 are inserted between the ring 16 and the disk 10. The dimensions of the clutch lining 20 and the clutch ring 21 and their materials are preferably identical to one another.

In die Führungsstücke 8 sind Bohrungen 23 parallel zu der Richtung des Pfeiles 19 eingearbeitet, in welchen sich Druckfedern 24 befinden. Jede Druckfeder 24 drückt unter Zwischenschaltung der Druckscheibe 22 den Kupp­ lungsring 21 gegen den Ring 16, während dieser über den Kupplungsbelag 20 auf die Ringscheibe 15 drückt. Auf diese Weise entsteht eine Bremse, vorzugsweise ei­ne Lamellenbremse mit zu der Antriebswelle 2 konzen­trischen, aus dem Kupplungsbelag 20 und dem Kupplungs­ring 21 bestehenden Reibbelägen, die einer Relativbe­wegung von Welle 2 und Spannsegmenten 7 entgegenwirkt. Die dadurch hervorgerufene Hemmung tritt nicht nur an einer bestimmten radialen Stellung der Spannsegmente 7 oder eines Spannsegmentes 7, sondern an jeder beliebi­gen radialen Stelle der Spannsegmente 7 ein. Immer dann, wenn die radiale Stellung der Spannsegmente 7, d. h. die relative Stellung zwischen Welle 2 und den Spannsegmenten 7 verändert werden soll, müssen die aus den Kupplungsbelägen und ihren zugehörigen Teilen be­stehende Bremse und die durch die Druckfedern 24 her­vorgerufenen Bremskräfte überwunden werden. Dabei kön­nen diese Bremskräfte bei der Montage der Einrichtung derart gewählt oder eingestellt werden, daß die Spann­segmente 7 aufgrund von in der Maschine befindlichen Schwingungen, Beschleunigungs- oder Verzögerungskräften nicht auf unerwünschte Weise radial nach innen rutschen können. Auf diese Weise wird verhindert, daß das Kern­rohr 13, die aufgewickelte Rolle od. dgl. nicht etwa auf unerwünschte Weise während des Betriebes der Ein­richtung locker wird.In the guide pieces 8 bores 23 are machined parallel to the direction of the arrow 19, in which compression springs 24 are located. Each compression spring 24 presses the clutch with the interposition of the pressure disk 22 lungsring 21 against the ring 16, while this presses on the clutch disc 20 on the washer 15. In this way, a brake, preferably a multi-disc brake with concentric to the drive shaft 2, consisting of the clutch lining 20 and the clutch ring 21 friction linings, which counteracts a relative movement of the shaft 2 and the clamping segments 7. The resulting inhibition occurs not only at a certain radial position of the clamping segments 7 or a clamping segment 7, but at any radial position of the clamping segments 7. Whenever the radial position of the clamping segments 7, ie the relative position between the shaft 2 and the clamping segments 7, is to be changed, the brake consisting of the clutch linings and their associated parts and the braking forces caused by the compression springs 24 must be overcome. These braking forces can be selected or adjusted during assembly of the device in such a way that the tensioning segments 7 cannot undesirably slide radially inwards due to vibrations, acceleration or deceleration forces in the machine. In this way it is prevented that the core tube 13, the wound roll or the like is not loosened undesirably during the operation of the device.

An der Außenseite der Ringscheibe 15, insbesondere an ihrem äußeren Durchmesser (da diese Ringscheibe im all­gemeinen kreisförmige Außenkontur besitzt), ist eine Verzahnung 25 vorzugsweise schräg in die Ringscheibe 15 eingearbeitet. In diese Verzahnung kann eine Sperr­klaue 26, die der Verzahnung entspricht, bei Bedarf da­durch eingreifen, daß sie durch einen Elektromagneten 27 oder einen Druckmittelzylinder in Richtung des Pfei­ les 28 verschoben werden kann. Wenn die Sperrklaue 26 in Figur 2 beispielsweise nach links verschoben wird, dann greift die Sperrklaue 26 in die Verzahnung 25 ein und hindert die Ringscheibe 15 und damit die gesamte, das Kernrohr oder die Hülse 13 ergreifende und span­nende Einrichtung an einer Drehbewegung. Der Elektro­magnet 27 oder ein diesem entsprechender Druckmittel­zylinder ist an dem Gehäuseteil 1 ortsfest befestigt. An Stelle einer Verzahnung 25 kann auch eine andere Einrichtung gewählt werden, die in der Lage ist, die in Rede stehende Spanneinrichtung zeitweise an einer Drehbewegung zu hindern. Dies kann beispielsweise durch eine Feststellbremse geschehen, oder aber auch dadurch, daß an Stelle einer Sperrklaue 26 ein einfacher runder Zapfen in eine entsprechende in die Ringscheibe 15 ein­gebrachte Bohrung eingesteckt werden kann. Wenn die Ringscheibe 15 an einer Drehung verhindert wird, bei­spielsweise durch in die Verzahnung 25 eingerastete Sperrklaue 26, kann die Welle 2 bei Einleitung eines entsprechenden Drehmomentes entgegen der durch den Kupplungsbelag 20 und den Kupplungsring 21 dargestell­ten Bremse oder den durch sie hervorgerufenen Kräften verdreht werden. Diese Verdrehung kann so weit gehen, daß die Spannsegemente 7 aufgrund der äußeren Kontur des Profilstückes 11 radial in Richtung des Pfeiles 12 nach außen geschoben werden, so daß sie in der Lage sind, die Kernrohre 13 oder eines dieser Kernrohre, Hülsen od. dgl. mit Sicherheit fest zu ergreifen und zu spannen. Andererseits werden die Spannsegmente 7 da­ran gehindert, in umgekehrte Richtung des Pfeiles 12, d. h. radial nach innen etwa dann sozusagen von alleine zurückzugleiten, wenn sie beispielsweise durch Schwin­gungen der Maschine auf unerwünschte Weise gegenüber dem Profilstück 11 rutschen sollten. Die Überwindung von Bremskräften beim Spannen der Kernrohre mag zu­ nächst verwunderlich erscheinen. Diese Bremskräfte sind jedoch gering gegenüber dem Drehmoment, das zum Wickeln der auf die Kernrohre 13 aufzuwickelnden Bah­nen an der Welle 2 zur Verfügung steht. Ein derart ho­hes Drehmoment ist wegen des Antriebes der herzustel­lenden Rollen bereits in der Maschine integriert, würde jedoch ohne die vorgeschlagene Einrichtung für den Zeitraum des Spannens der Kernrohre nicht benötigt. Die vorgeschlagene Einrichtung macht nun von dem Ge­danken Gebrauch, das an sich schon zur Verfügung ste­hende Drehmoment auch für den Vorgang des Spannens zu benutzen, womit ermöglicht wird, daß einerseits bei eingedrückter Sperrklaue 26 automatisch gespannt werden kann, d. h. derart, daß eine menschliche Hilfestellung für diesen Vorgang nicht mehr erforderlich wird, und daß andererseits das an sich zur Verfügung stehende Antriebsmoment auch für den Vorgang des Ergreifens und Spannens der Kernrohre genutzt wird. Die Sperrklaue 26 ist ihrerseits in unmittelbarer Umgebung der Halteein­richtung an dem Gehäuseteil 1, dem schwenkbaren Halte­arm od. dgl. befestigt, so daß der Weg zum Einrasten in die durch die Verzahnung gebildete Aufnahmeeinrich­tung für die Sperrklaue 26 denkbar kurz wird.On the outside of the washer 15, in particular on its outer diameter (since this washer generally has a circular outer contour), a toothing 25 is preferably incorporated obliquely into the washer 15. In this toothing, a locking claw 26, which corresponds to the toothing, can intervene if necessary in that it is moved by an electromagnet 27 or a pressure medium cylinder in the direction of the arrow les 28 can be moved. If, for example, the locking claw 26 is shifted to the left in FIG. 2, then the locking claw 26 engages in the toothing 25 and prevents the annular disk 15 and thus the entire, exciting and engaging device that engages the core tube or the sleeve 13 from rotating. The electromagnet 27 or a pressure medium cylinder corresponding to this is fixedly attached to the housing part 1. Instead of a toothing 25, another device can be selected that is able to temporarily prevent the clamping device in question from rotating. This can be done, for example, by means of a parking brake, or else in that instead of a locking claw 26, a simple round pin can be inserted into a corresponding hole made in the annular disk 15. If the annular disc 15 is prevented from rotating, for example by means of a locking claw 26 which is engaged in the toothing 25, the shaft 2 can be rotated against the brake represented by the clutch lining 20 and the clutch ring 21 or the forces caused by them when a corresponding torque is introduced. This rotation can go so far that the clamping segments 7 are pushed radially outward in the direction of arrow 12 due to the outer contour of the profile piece 11, so that they are able to core tubes 13 or one of these core tubes, sleeves or the like. to grasp and tension with certainty. On the other hand, the clamping segments 7 are prevented from sliding back in the reverse direction of the arrow 12, that is to say radially inward, so to speak, of their own accord, if, for example, they should slide in an undesired manner against the profile piece 11 due to machine vibrations. Overcoming braking forces when tensioning the core tubes may increase next appear surprising. However, these braking forces are low compared to the torque which is available for winding the webs to be wound onto the core tubes 13 on the shaft 2. Such a high torque is already integrated in the machine because of the drive of the rollers to be produced, but would not be required for the period of tensioning the core tubes without the proposed device. The proposed device now makes use of the idea of using the torque already available per se for the tensioning process, which makes it possible, on the one hand, to automatically tension when the locking claw 26 is pushed in, ie in such a way that human assistance for this process is no longer necessary, and that on the other hand the drive torque available per se is also used for the process of gripping and tensioning the core tubes. The locking claw 26 is in turn attached in the immediate vicinity of the holding device to the housing part 1, the pivotable holding arm or the like, so that the path for snapping into the receiving device formed by the toothing for the locking claw 26 is very short.

Das Lösen der Sperrklaue 26 kann entweder durch Ver­schiebung in Richtung des Pfeiles 28 relativ zu dem Ge­häuseteil 1 erfolgen oder aber dadurch, daß eine ent­sprechend anders angeordnete, beispielsweise um einen fixen Schwenkpunkt schwenkbare Einrichtung, aus der durch die Verzahnung 25 dargestellte Aufnahmeeinrich­tung für die Sperrklaue verschwenkt wird. Bei Bedarf können auch mehrere Sperrklauen 26 um die Außenseite der Ringscheibe 15, d. h., da dieses Teil i. a. kreis­rund ausgeführt wird, in der Nähe des Außenumfanges der Ringscheibe 15, verteilt angeordnet sein. Diese mehr­ fachen Sperrklauen können dann durch eine einzige Be­tätigung, beispielsweise mit Hilfe eines Druckknopfes oder eines Fernsteuerimpulses wirksam oder unwirksam gemacht werden.The locking claw 26 can be released either by displacement in the direction of the arrow 28 relative to the housing part 1 or else in that a correspondingly differently arranged device, which can be pivoted, for example, about a fixed pivot point, pivots out of the receiving device for the locking claw represented by the toothing 25 becomes. If necessary, a plurality of locking claws 26 can also be arranged around the outside of the ring disk 15, ie, since this part is generally circular, in the vicinity of the outer circumference of the ring disk 15. This more fold locking claws can then be made effective or ineffective by a single actuation, for example with the aid of a push button or a remote control pulse.

Da verschiedene Abwandlungen konstruktiver Art gegen­über der beschriebenen Konstruktion möglich sind, ist alles hier Beschriebene und in den Zeichnungen Darge­stellte eher als erläuternd, dann als begrenzend oder gar einengend zu verstehen.Since various modifications of a constructive type are possible compared to the construction described, everything described here and shown in the drawings is to be understood rather as explanatory, then as limiting or even restricting.

Teileliste:Parts list:

  • 1 Gehäuseteil1 housing part
  • 2 Welle2 wave
  • 3 Lager3 bearings
  • 4 Lager4 bearings
  • 5 Drehteil5 turned part
  • 6 Flansch6 flange
  • 7 Spannsegment7 clamping segment
  • 8 Führungsstück8 guide piece
  • 9 Schraube9 screw
  • 10 Scheibe10 disc
  • 11 Profilstück11 profile piece
  • 12 Pfeil12 arrow
  • 13 Kernrohr13 core tube
  • 14 Schraube14 screw
  • 15 Ringscheibe15 washer
  • 16 Ring16 ring
  • 17 Zapfen17 cones
  • 18 Ausnehmung18 recess
  • 19 Pfeil19 arrow
  • 20 Kupplungsbelag20 clutch lining
  • 21 Kupplungsring21 clutch ring
  • 22 Druckscheibe22 thrust washer
  • 23 Bohrung23 hole
  • 24 Druckfeder24 compression spring
  • 25 Aufnahmeeinrichtung25 receiving device
  • 26 Sperrklaue26 locking claw
  • 27 Elektromagnet27 electromagnet
  • 28 Pfeil28 arrow

Claims (7)

1. Einrichtung zum lösbaren Haltern von Kernrohren (13), von Rollen aus Papier, Folie, Kunststoffen, Metallen, Gewebe od. dgl. mit mindestens zwei auf je mindestens einem Profilstück (11) od. dgl. ver­.schiebbaren, in ihrer radialen Position veränder- und feststellbaren Spannsegmenten (7), gekennzeich­net durch eine in jeder radialen Stellung der Spannsegmente (7) wirksame, einer Verschiebung je­des Spannsegmentes (7) entgegenwirkende Bremse (15, 16, 20, 21, 26), eine in der unmittelbaren Umgebung am Maschinengestell (1) ortsfest befestigte beweg­liche Sperrklaue (26), einen Zapfen, eine Ratsche od. dgl. und eine an der Außenseite der Halteein­richtung benachbarte, dem Zapfen, der Ratsche, der Sperrklaue (26) od. dgl. entsprechende Aufnahmeein­richtung (25).1. Device for releasably holding core tubes (13), rolls of paper, foil, plastics, metals, fabrics or the like. With at least two on at least one profile piece (11) or the like. Slidable, in their radial Position changeable and ascertainable clamping segments (7), characterized by a brake (15, 16, 20, 21, 26) effective in each radial position of the clamping segments (7) and counteracting a displacement of each clamping segment (7), one in the immediate vicinity Movable locking claw (26) fixed to the machine frame (1), a pin, a ratchet or the like and a receiving device (25) corresponding to the pin, the ratchet, the locking claw (26) or the like, which is adjacent to the outside of the holding device ). 2. Einrichtung nach Anspruch 1, dadurch gekennzeich­net, daß der Zapfen, die Ratsche, die Sperrklaue (26) od. dgl. bei Bedarf lösbar ist.2. Device according to claim 1, characterized in that the pin, the ratchet, the locking claw (26) or the like. Is releasable if necessary. 3. Einrichtung nach den Ansprüchen 1 und 2, gekenn­zeichnet durch mindestens einen Elektromagneten, Druckmittelzylinder (27) od. dgl. je Zapfen, Rat­sche, Klaue (26) od. dgl.3. Device according to claims 1 and 2, characterized by at least one electromagnet, pressure cylinder (27) or the like. Per pin, ratchet, claw (26) or the like. 4. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Bremse (15, 16, 20, 21, 26) eine Reibungs­bremse ist.4. Device according to claim 1, characterized in that the brake (15, 16, 20, 21, 26) is a friction brake. 5. Einrichtung nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß die Bremse (15, 16, 20, 21, 16) mindestens einen Reibbelag (20, 21) od. dgl. ent­hält.5. Device according to claims 1 and 4, characterized in that the brake (15, 16, 20, 21, 16) or at least one friction lining (20, 21). 6. Einrichtung nach den Ansprüchen 1, 4 und 5, gekenn­zeichnet durch eine Lamellenbremse.6. Device according to claims 1, 4 and 5, characterized by a multi-disc brake. 7. Einrichtung nach den Ansprüchen 1, 4, 5 und 6, da­durch gekennzeichnet, daß die Reibbeläge (20, 21) od. dgl. konzentrisch zu der Antriebswelle (2) an­geordnet sind.7. Device according to claims 1, 4, 5 and 6, characterized in that the friction linings (20, 21) or the like. Are arranged concentrically to the drive shaft (2).
EP89202493A 1988-11-05 1989-10-04 Holding device Expired - Lifetime EP0369498B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3837611A DE3837611A1 (en) 1988-11-05 1988-11-05 FIXING DEVICE
DE3837611 1988-11-05

Publications (3)

Publication Number Publication Date
EP0369498A2 true EP0369498A2 (en) 1990-05-23
EP0369498A3 EP0369498A3 (en) 1990-05-30
EP0369498B1 EP0369498B1 (en) 1992-12-30

Family

ID=6366571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89202493A Expired - Lifetime EP0369498B1 (en) 1988-11-05 1989-10-04 Holding device

Country Status (7)

Country Link
US (1) US4964586A (en)
EP (1) EP0369498B1 (en)
JP (1) JPH0729707B2 (en)
CA (1) CA2002128C (en)
DE (2) DE3837611A1 (en)
ES (1) ES2037400T3 (en)
FI (1) FI87342C (en)

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EP2727729A1 (en) * 2012-11-06 2014-05-07 Miyakoshi Printing Machinery Co., Ltd. Printing cylinder asssembly for a printing machine

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US6079662A (en) * 1999-03-31 2000-06-27 Tidland Corporation Slip shaft assembly having core axial position fixing mechanism
DE10331943A1 (en) * 2003-07-15 2005-02-17 Nexpress Solutions Llc Print machine cylinder sleeve exchange method in which to permit removal of the sleeve parts of the cylinder are compressed towards each other and then, after exchange of the sleeve, expanded outwards again
US7077184B2 (en) * 2004-01-05 2006-07-18 Mertins Jr Orville Lee System, apparatus, and method for dispensing strips of tape
CN107226366A (en) * 2017-07-05 2017-10-03 福建泉州凹凸精密机械有限公司 Cloth beam with tuck

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CH665193A5 (en) * 1983-11-04 1988-04-29 Agfa Gevaert Ag DEVICE FOR FASTENING A REEL CARRIER.

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JPS561236Y2 (en) * 1977-07-29 1981-01-13
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CH568237A5 (en) * 1972-08-25 1975-10-31 Agfa Gevaert Ag
US4037804A (en) * 1976-06-23 1977-07-26 Rothmans Of Pall Mall Canada Limited Locking mechanism
CH665193A5 (en) * 1983-11-04 1988-04-29 Agfa Gevaert Ag DEVICE FOR FASTENING A REEL CARRIER.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2727729A1 (en) * 2012-11-06 2014-05-07 Miyakoshi Printing Machinery Co., Ltd. Printing cylinder asssembly for a printing machine
US9021950B2 (en) 2012-11-06 2015-05-05 Miyakoshi Printing Machinery Co., Ltd. Printer cylinder assembly for a printing machine

Also Published As

Publication number Publication date
DE3837611A1 (en) 1990-05-10
ES2037400T3 (en) 1993-06-16
JPH0729707B2 (en) 1995-04-05
US4964586A (en) 1990-10-23
CA2002128C (en) 1994-07-26
FI87342C (en) 1992-12-28
DE58903172D1 (en) 1993-02-11
FI87342B (en) 1992-09-15
CA2002128A1 (en) 1990-05-05
EP0369498A3 (en) 1990-05-30
EP0369498B1 (en) 1992-12-30
FI895235A0 (en) 1989-11-03
JPH02198955A (en) 1990-08-07

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