EP0721905B1 - Method and device for preparing the opening of a reel - Google Patents

Method and device for preparing the opening of a reel Download PDF

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Publication number
EP0721905B1
EP0721905B1 EP94810716A EP94810716A EP0721905B1 EP 0721905 B1 EP0721905 B1 EP 0721905B1 EP 94810716 A EP94810716 A EP 94810716A EP 94810716 A EP94810716 A EP 94810716A EP 0721905 B1 EP0721905 B1 EP 0721905B1
Authority
EP
European Patent Office
Prior art keywords
reel
flat blade
turn
blade
parallel
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
EP94810716A
Other languages
German (de)
French (fr)
Other versions
EP0721905A1 (en
Inventor
Jean Cestonaro
David Vuilleumier
Pascal Christen
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.)
Philip Morris Products SA
Original Assignee
Philip Morris Products 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 Philip Morris Products SA filed Critical Philip Morris Products SA
Priority to EP94810716A priority Critical patent/EP0721905B1/en
Priority to DE69430064T priority patent/DE69430064T2/en
Priority to DE69522303T priority patent/DE69522303T2/en
Priority to EP95810754A priority patent/EP0716996B1/en
Priority to US08/570,278 priority patent/US6227088B1/en
Publication of EP0721905A1 publication Critical patent/EP0721905A1/en
Application granted granted Critical
Publication of EP0721905B1 publication Critical patent/EP0721905B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00Changing the web roll
    • B65H19/10Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/105Opening of web rolls; Removing damaged outer layers; Detecting the leading end of a closed web roll
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/46Splicing
    • B65H2301/4604Opening web rolls, remove outer layers
    • B65H2301/46044Opening web rolls, remove outer layers by cutting or perforating in tranverse direction
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00Cutting
    • Y10S83/929Particular nature of work or product
    • Y10S83/949Continuous or wound supply
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/343With means to deform work temporarily
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/525Operation controlled by detector means responsive to work
    • Y10T83/538Positioning of tool controlled
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/748With work immobilizer
    • Y10T83/7487Means to clamp work
    • Y10T83/7493Combined with, peculiarly related to, other element
    • Y10T83/75With or to tool guide
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/748With work immobilizer
    • Y10T83/7487Means to clamp work
    • Y10T83/7493Combined with, peculiarly related to, other element
    • Y10T83/7513Tool or tool support on movable clamp jaw
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/748With work immobilizer
    • Y10T83/7487Means to clamp work
    • Y10T83/7573Including clamping face of specific structure
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8737With tool positioning means synchronized with cutting stroke
    • Y10T83/8739Anvil moves into and out of operative position
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8745Tool and anvil relatively positionable
    • Y10T83/8746Straight line
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8748Tool displaceable to inactive position [e.g., for work loading]
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8821With simple rectilinear reciprocating motion only
    • Y10T83/8822Edge-to-edge of sheet or web [e.g., traveling cutter]

Definitions

  • the present invention relates to a method and a device for preparation of the opening of a reel made of a strip of material flexible wound in superimposed turns and having an upper turn the free end of which is fixed to the turn which is directly below it, said coil being arranged on a support axis and comprising two sides parallel.
  • the method and the device according to the invention apply particularly good at relatively narrow coils, i.e. delivering a strip having a maximum width of the order of a few centimeters.
  • the upper coil turn is covered with a protective strip, made of a material which may be different of that constituting the coil; by upper turn of the coil is meant in the following description, this possible protective strip as well as the or the first turns of the coil.
  • the closest prior art to be considered is disclosed by the request DE-A-32.15.355.
  • the device described comprises a support bar on which are mounted a cutting blade and a coil separation blade, the separation of the turns as well as the cut being controlled simultaneously by the movement of the support bar.
  • This device includes many disadvantages: the planned construction does not allow to adjust the distance between the support bar and the separating blade, on the other hand it is quite difficult to minimize the height of the flange on which the blade is fixed separation, causing an excessive number of turns to be cut; on the other hand, it suffices that the spring effect of the separation blade is reduced, for example after long use, so that the tightening effect between the support bar and the separation blade is no longer guaranteed, so it is possible to have one or more turns of the strip between the separation blade and the support bar that is not properly sectioned; the support bar directly resting on the upper turns, these are compressed which does not facilitate the introduction of the separation blade; the simultaneity of movements in advance of the support bar pressing on the last turn, separation and cutting blade causes the turns to move cut as well as damage to the coil placed directly under the separation blade and does not allow a clean cut of the turns to be cut; the device described does not allow several passages of the knife and, given the fixing of the cutting blade. on the support bar, exchanging a worn cutting blade is difficult
  • An object of the invention is therefore to propose a compatible method with known reel opening methods, not meeting the disadvantages of the means of the prior art and making it possible to ensure that the turn directly below the last cut turn is absolutely intact, even if the upper turns of the coil are wrapped fairly tightly.
  • Another object of the invention is to propose a device for preparation of the opening of a coil which can be adapted on a device opening of a known coil and keeping the coil located intact directly below the last cut turn, even if the turns upper parts of the spool are wound fairly tightly.
  • Figure 1 shows a cutting preparation device 1 arranged above a coil 2 fixed to a support pin (not shown) and comprising a plurality of turns 20 including in particular an upper turn 21 of which the front end is glued to the turn which is directly below it in order to close the coil.
  • Coil 2 can still be defined by its two surfaces lateral forming its two parallel sides 22.
  • the device 1 firstly comprises a first actuator 10, for example a hydraulic or pneumatic cylinder whose external cylinder is fixed to a machine frame 3 by known means 30.
  • the means 30 allow movement of device 1 in order to bring it above coil 2 to prepare its opening and then retract said device so that it does not interfere the subsequent operations to be carried out on the spool.
  • the external body of the actuator 10 respectively the cylinder of the jack, is fixed and immobile with respect to to the coil 2.
  • the actuator 10 comprises a movable rod 11, capable of move in one direction or the other, in a perpendicular direction to the support axis of the coil and directed towards said support axis.
  • the end of the movable rod 11 of the jack 10 is fixed to a first support 12 extending parallel to the support axis of the coil, preferably behind the coil 2, as can be seen particularly in FIG. 2.
  • Guide means 12A prevent rotation of the support 12 in order to keep the support 12 always aligned with the coil support axis.
  • a baluster 12B maintains a blade support 13 at a vertical distance determined and fixed relative to the support 12.
  • a flat blade 13A can slide inside the blade support 13, in a direction parallel to the axis support of the coil 2, passing from a retracted position as seen on the Figure 2 at an advanced position towards the coil 2, as seen in Figure 4.
  • the movement of advance or withdrawal of the flat blade 13A is obtained by a second motion actuator 13B, pneumatic or hydraulic included in the blade support 13.
  • a double set of braces 15 each consisting of a pair of bars 15A and 15B is arranged on each side of the support 14 parallel to the sides of coil 2 and below said support.
  • a first central axis 16 connects each of the crosspieces 15 by a position preferably central of each of the bars 15A and 15B, allowing said bars to pivot around said first central axis.
  • the upper end of each of the bars 15A is fixed, each on an opposite face of the support 14, by means a second axis 16A, passing through said support and allowing said bars to pivot simultaneously around said second axis.
  • the upper extremities bars 15B are likewise connected by a third axis 16B, said axis being sliding in a direction perpendicular to the axis of the coil 2 thus that in the direction of movement of the first movable rod 11, in a borehole 14A through and extending in the direction of the second axis 16A, of the support 14.
  • the end of the support 14 distal from that fixed to the support 12 supports a third actuator 17, which can also be a pneumatic or hydraulic cylinder, comprising a second movable rod 17A, fixed by its end to the axis 16B and able to move said axis parallel to itself in the bore 14A, according to the direction defined above.
  • each bars 15A and each of the bars 15B are connected by two fourth axes 16C, said axes not being pivotable relative to bars 15A or to bars 15B.
  • the two 16C axes each support a friction lining 18 interconnecting and being arranged below the lower ends two opposite bars 15A, respectively two opposite bars 15B.
  • the friction linings 18 are therefore parallel to the support axis of the coil 2 and are each covered, on their side facing coil 2, a coating with a high coefficient of friction with respect to the material constituting the turns 20 of the coil, for example rubber.
  • the contact surfaces of said coatings are rounded, ridges longitudinal can be provided on these surfaces.
  • the spacing between the two opposite cross-pieces 15, respectively the length of the friction linings 18, is at least equal to the width of the strip of material constituting the coil 2.
  • each of the bars 15A pivots around the axis 16A
  • each bars 15B pivots in the opposite direction around the axis 16B
  • the ends of each of the bars respectively the contact surfaces of the linings 18 swivel slightly against each other.
  • a cutting device 4 comprising in particular a cutting blade 40 which is arranged in position Wait.
  • the coil 2 is stationary on its support axis.
  • the means 30, allowing to bring the preparation device 1 are actuated in order to position said device near the upper turn 21, the two friction linings 18 slightly above the coil 21, being parallel to the axis of the coil and not being in contact with the coil 21 while the blade 13A is positioned a few tenths of a mm below the upper surface of the upper turn 21.
  • the distance from said surface greater than which the flat blade 13A is arranged depends essentially on the thickness of the strip of material constituting the upper turn 21.
  • the actuator 10 maintains the movable rod 11 in the retracted position, while the actuator 13B maintains the flat blade 13A in the retracted position and that the actuator 17 maintains the axis 16B in a position remote from the axis 16A.
  • the determination from this starting position of the device 1 relative to the coil 2 can be done manually or automatically by means of a position (not shown, but may be of the same type as that described more bottom next to the second embodiment of the device) coupled to a control unit 9, capable of determining that the device is positioned correctly above the turn 21 and that the flat blade 13A is positioned correctly with respect to said turn.
  • actuator 17 is actuated, which brings the axis 16B closer to the axis 16A causing the movements described above, either a descent of the contact surfaces of the friction linings 18 in contact with and resting on the coil 21, and a bringing together of the two say fittings accompanied by their pivoting movement.
  • These movements of the two linings 18 were sufficient, as soon as these entered contact with upper coil 21, pinch it slightly and then lift it and create an arch 21A between the two linings 18, as seen in the figure 3.
  • This arch 21A on the coil 21 is therefore caused by the combination of the movements described, first of all a strong contact between the linings 18 and two surfaces distant from the coil 21, then by the bringing together and the pivoting of the two linings which, given the high coefficient of friction of their coating, do not slide on the coil 21.
  • the actuator 17 is stopped, while the actuator 13B is activated in order to advance the flat blade 13A so that its end passes into the space included under the arch 21A, i.e. between the upper turn 21 and the turns of the lower layers 20.
  • the flat blade 13A is held in this position and the device cutting blade 4, respectively the cutting blade 40, is brought between the bars of the cross 15, directly above the arch 21.
  • the means by which the blade 40 is actuated are not part of the preparation device according to the invention, but from one of the cutting devices described in one of the patents mentioned in the introduction.
  • the blade 40 can thus cut the arch 21A, respectively the upper turn 21 by sinking only to the blade plate 13A against which it finally comes into abutment. So the flat blade 13A has protected the first of the turns of the lower layers 20 which cannot therefore not be started by the blade 40.
  • the end of the blade plate 13A penetrating between two turns of the coil 2 is of rounded shape so not to hurt the turns.
  • the cutting blade 40 is removed, then the flat blade 13A by the actuator 13B, then the actuator 10 is again actuated in order to separate the linings 18 from the turn 21 and the means 30 move the device 1 away from the coil 2.
  • the means by which the upper end of the coil 21 is gripped in order to be brought to the manufacturing machine are also not described here since they are in the patents cited above.
  • the cutting was carried out only on the upper turn 21, in fact the arch 21A is formed of several of the upper turns of the coil, possibly with the protective strip mentioned above, so that several turns are then cut.
  • the device for preparing the opening of a reel has been described above according to a preferred embodiment, it is obvious that variants of this embodiment can be provided; in particular it is not not at all necessary that the device 1 be placed above the coil 2 in a vertical position, in fact it could be oriented in any angle to the center of the spool, provided that the relative angles of the various movements described are preserved. Likewise the actuators described as being pneumatic or hydraulic cylinders could be made of any element capable of producing the movements described.
  • Another embodiment of the means making it possible to bring the two axes 16A and 16B could also be provided, for example a rod having two sections threaded in opposite directions, rotated by the actuator 17, each of the threaded sections passing through a threaded hole of axis 16A, respectively axis 16B.
  • the axis central 16 has been described as being disposed in a central position of each of the bars 15A and 15B; in fact it could be shifted so that have a movement of the linings 18 multiplied or divided with respect to the movement bringing together the two axes 16A and 16B.
  • the support 14 supporting the cross-pieces 15 and the friction linings 18 is independent of the support 12 supporting the blade 13A, so able to be moved away from the coil 2 after the blade 13A has been inserted in the coil in order to leave sufficient space for the device, if necessary cutting 4.
  • FIG. 5 Another embodiment of an opening preparation device of a coil is shown in Figures 5 to 8.
  • a coil 2 comprising a plurality of turns 20 and in particular an upper turn 21 is fixed on a support axis not shown.
  • the preparation device is here composed of a device blade holder 5, a position detection device 6 and a control unit 9; it can be completed with a blowing device 7.
  • These different elements are shown separated from each other to make the figures clearer, but it is obvious that they are part of the same whole and are connected to a common plate comprising displacement means suitable for bringing said elements into an action position close to coil 2.
  • the device blade holder 5 includes a flat blade 50, absolutely similar to the blade plate 13A described above, and being able to take a retracted position, as in figure 6, or an advanced position, as in figure 8, under the effect of an actuator 51.
  • the blade holder 5 is mounted on another actuator 52 able to very precisely position the flat blade 50 relative to the upper turn 21 of the coil 2 as will be seen below. Since the coils to open may not all have the same diameter, it is necessary to detect the position of the upper turn 21.
  • a device is provided 6 position detection of said upper turn, consisting of another actuator 60 fitted with a touch element 61, preferably a roller, which, positioned first clearly above the upper turn 21, as shown in Figure 5, then lowers the finger 61 to what it comes into contact with the upper turn 21, as seen in the Figure 7. This position is noted by the control unit 9 which can then activate the actuator 52 in order to place the flat blade 50 a few tenths of mm below the dimension corresponding to the upper surface of the coil upper 21.
  • the distance from said upper surface at which the flat blade 50 is arranged essentially depends on the thickness of the strip of material constituting the coil 2. Taking into account that the turns of the coil 2 are not too tight, the blade 50 is gently inserted under the upper turn 21, preferably for the reason indicated above in look of the first embodiment, under at least two of the upper turns.
  • This advance movement of the flat blade 50 can then be carried out the coil 2 is stationary or when it is animated by a slow rotational movement in the direction from roller 61 towards the blade flat 50.
  • the direction of this rotational movement is opposite to that of the normal unwinding of the reel so that, during this movement of rotation, the flat blade 50 tends to be pushed up by the winding in spiral of the coil turns.
  • the roller 61 can continue to detect the position of the upper layer 21 in order to correct the position of the flat blade 50 in the case where the coil 2 is not not exactly circular.
  • the spool is stopped in case it has been rotated and, as for the first embodiment described, a cutting device 4 is approached in order to cut the turns arranged above the flat blade 50, by not cutting only these, the cutting movement being limited by the flat blade 50.
  • the preparation device can be completed by a blowing device 7, essentially consisting of a blowing nozzle 70, which projects a jet of pressurized air directly above the flat blade 50, in the direction of the coil 2, in order to help lift the turns superior, thus facilitating the penetration of the flat blade 50.
  • the means of detection 6 can also be designed so as not to come into contact with the upper turn 21, for example be made up of detection means optics.
  • a preparation device allows, in cooperation with a device cutting and gripping the upper turns of a coil, obtaining a strip of intact material for later use, said strip having not been damaged by the cutting device.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Description

La présente invention concerne un procédé ainsi qu'un dispositif de préparation de l'ouverture d'une bobine constituée d'une bande d'un matériau souple enroulée en spires superposées et comportant une spire supérieure dont l'extrémité libre est fixée sur la spire qui lui est directement inférieure, ladite bobine étant disposée sur un axe support et comportant deux flancs parallèles. Le procédé et le dispositif selon l'invention s'appliquent particulièrement bien à des bobines relativement étroites, c'est-à-dire délivrant une bande ayant une largeur maximum de l'ordre de quelques centimètres.The present invention relates to a method and a device for preparation of the opening of a reel made of a strip of material flexible wound in superimposed turns and having an upper turn the free end of which is fixed to the turn which is directly below it, said coil being arranged on a support axis and comprising two sides parallel. The method and the device according to the invention apply particularly good at relatively narrow coils, i.e. delivering a strip having a maximum width of the order of a few centimeters.

De nombreux brevets décrivent différents procédés et dispositifs dans lesquels il est nécessaire d'ouvrir une bobine constituée notamment d'une bande de papier ou d'un autre matériau et destinée à alimenter une machine de fabrication, en particulier les brevets EP-A-0.318.427, EP-A-0.331.634 et EP-A-0.475.886. Ces brevets prévoient de manière générale qu'une lame coupante, disposée perpendiculairement au sens de déroulement de la bande de papier est appliquée sur la spire supérieure de la bobine afin de la couper. La lame coupante étant appuyée sur la spire supérieure avec une certaine force et/ou s'enfonçant dans la bobine d'une certaine distance, généralement plusieurs spires de la bande sont coupées simultanément, sans que ce nombre de spires puisse être contrôlé. Par ces systèmes, il arrive fréquemment que la spire située directement au-dessous de la dernière spire coupée soit entamée par la lame, créant ainsi un point faible amenant à une rupture ultérieure de la bande en ce point. Une telle rupture nécessite un arrêt de la machine d'où une perte de productivité. Dans certains cas, la spire supérieure de la bobine est recouverte d'une bande de protection, faite d'un matériau pouvant être différent de celui constituant la bobine; par spire supérieure de la bobine, on entend dans la suite de la description cette éventuelle bande de protection ainsi que la ou les premières spires de la bobine.Numerous patents describe different processes and devices in which it is necessary to open a coil consisting in particular of a strip of paper or other material intended to feed a machine of manufacture, in particular the patents EP-A-0.318.427, EP-A-0.331.634 and EP-A-0475886. These patents generally provide that a blade cutting, arranged perpendicular to the direction of unwinding of the strip paper is applied to the upper coil of the coil in order to cut it. The cutting blade being supported on the upper coil with a certain force and / or sinking into the coil from a certain distance, usually several turns of the strip are cut simultaneously, without this number of turns can be controlled. Through these systems, it often happens that the turn directly below the last cut turn is started by the blade, thus creating a weak point leading to a subsequent rupture of the strip at this point. Such a break requires a stop of the machine where a loss of productivity. In some cases, the upper coil turn is covered with a protective strip, made of a material which may be different of that constituting the coil; by upper turn of the coil is meant in the following description, this possible protective strip as well as the or the first turns of the coil.

L'art antérieur le plus proche à considérer est divulgué par la demande DE-A-32.15.355. Le dispositif décrit comprend une barre support sur laquelle sont montées une lame de coupe et une lame de séparation de spires, la séparation des spires de même que la coupe étant commandées simultanément par le mouvement de la barre support. Ce dispositif comprend de nombreux inconvénients: la construction prévue ne permet pas de régler la distance entre la barre support et la lame de séparation, d'autre part il est assez difficile de minimiser la hauteur du réhaut sur lequel est fixée la lame de séparation, ceci faisant qu'un nombre excessif de spires doit être coupé; d'autre part, II suffit que l'effet de ressort de la lame de séparation soit diminué, par exemple après une longue utilisation, pour que l'effet de serrage entre la barre support et la lame de séparation ne soit plus garanti, ainsi il est possible d'avoir une ou plusieurs spires de la bande entre la lame de séparation et la barre support qui ne soient pas correctement sectionnées; la barre support s'appuyant directement sur les spires supérieures, celles-ci sont comprimées ce qui ne facilite pas l'introduction de la lame de séparation; la simultanéité des mouvements d'avance de la barre support en appui sur la dernière spire, de la lame de séparation et de la coupe entraíne un déplacement des spires à couper ainsi qu'un endommagement de la spire disposée directement sous la lame de séparation et ne permet pas une coupe franche des spires à couper; le dispositif décrit ne permet pas plusieurs passages du couteau et, vu la fixation de la lame de coupe.sur la barre support, l'échange d'une lame de coupe usée est difficile. Ce dispositif ne comporte en outre aucun moyen permettant de relâcher la tension des spires supérieures de la bobine au cas où lesdites spires sont enroulées de manière serrée, ce qui rend impossible dans ce cas l'utilisation du dispositif décrit.The closest prior art to be considered is disclosed by the request DE-A-32.15.355. The device described comprises a support bar on which are mounted a cutting blade and a coil separation blade, the separation of the turns as well as the cut being controlled simultaneously by the movement of the support bar. This device includes many disadvantages: the planned construction does not allow to adjust the distance between the support bar and the separating blade, on the other hand it is quite difficult to minimize the height of the flange on which the blade is fixed separation, causing an excessive number of turns to be cut; on the other hand, it suffices that the spring effect of the separation blade is reduced, for example after long use, so that the tightening effect between the support bar and the separation blade is no longer guaranteed, so it is possible to have one or more turns of the strip between the separation blade and the support bar that is not properly sectioned; the support bar directly resting on the upper turns, these are compressed which does not facilitate the introduction of the separation blade; the simultaneity of movements in advance of the support bar pressing on the last turn, separation and cutting blade causes the turns to move cut as well as damage to the coil placed directly under the separation blade and does not allow a clean cut of the turns to be cut; the device described does not allow several passages of the knife and, given the fixing of the cutting blade. on the support bar, exchanging a worn cutting blade is difficult. This device also does not include any means allowing release the tension of the upper turns of the coil in case said turns are tightly wound, making it impossible in this case use of the device described.

Les documents DE-A-39.18.552 et US-A-4.821.971 décrivent des dispositifs d'ouverture de bobines de grande largeur; les problèmes qui se posent dans ce cas sont essentiellement différents de ceux que propose de résoudre l'invention; en particulier ces dispositifs ne peuvent prévoir l'introduction d'une lame de séparation de spires sur toute la largeur de la bobine.Documents DE-A-39.18.552 and US-A-4.821.971 describe large width reel openers; the problems that pose in this case are essentially different from those proposed by solve the invention; in particular these devices cannot provide the introduction of a spiral separation blade over the entire width of the coil.

Un but de l'invention est donc de proposer un procédé compatible avec les procédés d'ouverture de bobine connus, ne rencontrant pas les inconvénients des moyens de l'art antérieur et permettant d'assurer que la spire située directement au-dessous de la dernière spire coupée est absolument intacte, ceci même si les spires supérieures de la bobine sont enroulées de manière assez serrée.An object of the invention is therefore to propose a compatible method with known reel opening methods, not meeting the disadvantages of the means of the prior art and making it possible to ensure that the turn directly below the last cut turn is absolutely intact, even if the upper turns of the coil are wrapped fairly tightly.

Un autre but de l'invention est de proposer un dispositif de préparation de l'ouverture d'une bobine pouvant être adapté sur un dispositif d'ouverture d'une bobine connu et conservant intacte la spire située directement au-dessous de la dernière spire coupée, ceci même si les spires supérieures de la bobine sont enroulées de manière assez serrée.Another object of the invention is to propose a device for preparation of the opening of a coil which can be adapted on a device opening of a known coil and keeping the coil located intact directly below the last cut turn, even if the turns upper parts of the spool are wound fairly tightly.

Ces buts sont atteints par un procédé répondant aux caractéristiques des revendications 1 à 8 ainsi que par un dispositif possédant les caractéristiques mentionnées aux revendications 9 à 17.These goals are achieved by a process that meets the characteristics of claims 1 to 8 as well as by a device having the characteristics mentioned in claims 9 to 17.

L'invention est décrite ci-dessous en regard du dessin annexé comportant les figures où:

  • la figure 1 représente une vue de face d'une première forme d'exécution d'un dispositif selon l'invention en position d'attente,
  • la figure 2 représente une vue de côté du même dispositif selon la même position,
  • la figure 3 est une vue semblable à celle de la figure 1 avec le dispositif en fonctionnement,
  • la figure 4 est une vue semblable à celle de la figure 2 avec le dispositif en fonctionnement,
  • la figure 5 représente une vue de face d'une deuxième forme d'exécution d'un dispositif selon l'invention en position d'attente,
  • la figure 6 représente une vue de côté du même dispositif selon la même position,
  • la figure 7 est une vue semblable à celle de la figure 5 avec le dispositif en fonctionnement, et
  • la figure 8 est une vue semblable à celle de la figure 6 avec le dispositif en fonctionnement.
  • The invention is described below with reference to the appended drawing comprising the figures where:
  • FIG. 1 represents a front view of a first embodiment of a device according to the invention in the waiting position,
  • FIG. 2 represents a side view of the same device according to the same position,
  • FIG. 3 is a view similar to that of FIG. 1 with the device in operation,
  • FIG. 4 is a view similar to that of FIG. 2 with the device in operation,
  • FIG. 5 represents a front view of a second embodiment of a device according to the invention in the waiting position,
  • FIG. 6 represents a side view of the same device according to the same position,
  • FIG. 7 is a view similar to that of FIG. 5 with the device in operation, and
  • Figure 8 is a view similar to that of Figure 6 with the device in operation.
  • La figure 1 montre un dispositif de préparation de coupe 1 disposé au-dessus d'une bobine 2 fixée à un axe support (non représenté) et comportant une pluralité de spires 20 dont en particulier une spire supérieure 21 dont l'extrémité avant est collée sur la spire qui lui est directement inférieure afin de fermer la bobine. La bobine 2 peut encore être définie par ses deux surfaces latérales formant ses deux flancs parallèles 22.Figure 1 shows a cutting preparation device 1 arranged above a coil 2 fixed to a support pin (not shown) and comprising a plurality of turns 20 including in particular an upper turn 21 of which the front end is glued to the turn which is directly below it in order to close the coil. Coil 2 can still be defined by its two surfaces lateral forming its two parallel sides 22.

    Durant tout le processus décrit ci-dessous, la bobine 2 est immobile sur son axe support, sans qu'il soit nécessaire qu'elle soit bloquée sur ledit axe. Le dispositif 1 comprend tout d'abord un premier actuateur 10, par exemple un vérin hydraulique ou pneumatique dont le cylindre extérieur est fixé à un bâti de machine 3 par des moyens connus 30.During the whole process described below, the coil 2 is stationary on its support axis, without it being necessary for it to be blocked on said axis. The device 1 firstly comprises a first actuator 10, for example a hydraulic or pneumatic cylinder whose external cylinder is fixed to a machine frame 3 by known means 30.

    Selon les cas, il est possible que les moyens 30 permettent un déplacement du dispositif 1 afin de l'amener au-dessus de la bobine 2 pour préparer son ouverture et escamoter ensuite ledit dispositif afin qu'il ne gêne pas les opérations ultérieures à effectuer sur la bobine. On peut considérer que durant le fonctionnement du dispositif de préparation 1 le corps extérieur de l'actuateur 10, respectivement le cylindre du vérin, est fixe et immobile par rapport à la bobine 2. L'actuateur 10 comprend une tige mobile 11, susceptible de se déplacer dans un sens ou dans l'autre, selon une direction perpendiculaire à l'axe support de la bobine et dirigée vers ledit axe support. L'extrémité de la tige mobile 11 du vérin 10 est fixée à un premier support 12 s'étendant parallèlement à l'axe support de la bobine, de préférence en arrière de la bobine 2, comme on le voit particulièrement sur la figure 2. Des moyens de guidage 12A empêchent la rotation du support 12 afin de conserver le support 12 toujours aligné avec l'axe support de la bobine. Sur l'extrémité arrière du support 12, une colonnette 12B maintient un support de lame 13 à une distance verticale déterminée et fixe par rapport au support 12. Une lame plate 13A peut coulisser à l'intérieur du support de lame 13, selon une direction parallèle à l'axe support de la bobine 2, passant d'une position rétractée comme on le voit sur la figure 2 à une position avancée en direction de la bobine 2, comme on le voit à la figure 4. Le mouvement d'avance ou de retrait de la lame plate 13A est obtenu par un deuxième actuateur de mouvement 13B, pneumatique ou hydraulique inclus dans le support de lame 13. Un deuxième support 14, orienté de manière générale selon une direction perpendiculaire à l'axe support de la bobine 2 ainsi qu'à la direction de déplacement de la tige mobile 11, est fixé au-dessous du support 12. Un double jeu de croisillons 15 constitué chacun d'une paire de barres 15A et 15B est disposé sur chacun des côtés du support 14 parallèles aux flancs de la bobine 2 et au-dessous dudit support. Un premier axe central 16 relie chacun des croisillons 15 par une position de préférence centrale de chacune des barres 15A et 15B, permettant auxdites barres de pivoter autour dudit premier axe central. L'extrémité supérieure de chacune des barres 15A est fixée, chacune sur une face opposée du support 14, au moyen d'un deuxième axe 16A, traversant ledit support et permettant auxdites barres de pivoter simultanément autour dudit deuxième axe. Les extrémités supérieures des barres 15B sont reliées de même par un troisième axe 16B, ledit axe étant coulissant selon une direction perpendiculaire à l'axe de la bobine 2 ainsi qu'à la direction de déplacement de la première tige mobile 11, dans une forure 14A traversante et s'étendant en direction du deuxième axe 16A, du support 14. L'extrémité du support 14 distale de celle fixée au support 12 supporte un troisième actuateur 17, pouvant lui aussi être un vérin pneumatique ou hydraulique, comportant une deuxième tige mobile 17A, fixée par son extrémité à l'axe 16B et apte à déplacer parallèlement à lui-même ledit axe dans la forure 14A, selon la direction définie précédemment. Les extrémités inférieures de chacune des barres 15A et de chacune des barres 15B sont reliées par deux quatrième axes 16C, lesdits axes n'étant pas pivotants par rapport aux barres 15A ou aux barres 15B. Les deux axes 16C supportent chacun une garniture de frottement 18 reliant entre elles et étant disposées au-dessous des extrémités inférieures des deux barres 15A opposées, respectivement des deux barres 15B opposées. Les garnitures de frottement 18 sont donc parallèles à l'axe support de la bobine 2 et sont recouvertes chacune, sur leur face dirigée vers la bobine 2, d'un revêtement ayant un fort coefficient de friction par rapport au matériau constituant les spires 20 de la bobine, par exemple du caoutchouc. De préférence les surfaces de contact desdits revêtements sont arrondies, des striures longitudinales pouvant être prévues sur ces surfaces. De préférence, l'espacement entre les deux croisillons 15 opposés, respectivement la longueur des garnitures de frottement 18, est au moins égal à la largeur de la bande de matériau constituant la bobine 2. Depending on the case, it is possible that the means 30 allow movement of device 1 in order to bring it above coil 2 to prepare its opening and then retract said device so that it does not interfere the subsequent operations to be carried out on the spool. We can consider that during the operation of the preparation device 1 the external body of the actuator 10, respectively the cylinder of the jack, is fixed and immobile with respect to to the coil 2. The actuator 10 comprises a movable rod 11, capable of move in one direction or the other, in a perpendicular direction to the support axis of the coil and directed towards said support axis. The end of the movable rod 11 of the jack 10 is fixed to a first support 12 extending parallel to the support axis of the coil, preferably behind the coil 2, as can be seen particularly in FIG. 2. Guide means 12A prevent rotation of the support 12 in order to keep the support 12 always aligned with the coil support axis. On the rear end of the support 12, a baluster 12B maintains a blade support 13 at a vertical distance determined and fixed relative to the support 12. A flat blade 13A can slide inside the blade support 13, in a direction parallel to the axis support of the coil 2, passing from a retracted position as seen on the Figure 2 at an advanced position towards the coil 2, as seen in Figure 4. The movement of advance or withdrawal of the flat blade 13A is obtained by a second motion actuator 13B, pneumatic or hydraulic included in the blade support 13. A second support 14, oriented generally in a direction perpendicular to the support axis of the coil 2 as well as the direction of movement of the movable rod 11, is fixed below of the support 12. A double set of braces 15 each consisting of a pair of bars 15A and 15B is arranged on each side of the support 14 parallel to the sides of coil 2 and below said support. A first central axis 16 connects each of the crosspieces 15 by a position preferably central of each of the bars 15A and 15B, allowing said bars to pivot around said first central axis. The upper end of each of the bars 15A is fixed, each on an opposite face of the support 14, by means a second axis 16A, passing through said support and allowing said bars to pivot simultaneously around said second axis. The upper extremities bars 15B are likewise connected by a third axis 16B, said axis being sliding in a direction perpendicular to the axis of the coil 2 thus that in the direction of movement of the first movable rod 11, in a borehole 14A through and extending in the direction of the second axis 16A, of the support 14. The end of the support 14 distal from that fixed to the support 12 supports a third actuator 17, which can also be a pneumatic or hydraulic cylinder, comprising a second movable rod 17A, fixed by its end to the axis 16B and able to move said axis parallel to itself in the bore 14A, according to the direction defined above. The lower ends of each bars 15A and each of the bars 15B are connected by two fourth axes 16C, said axes not being pivotable relative to bars 15A or to bars 15B. The two 16C axes each support a friction lining 18 interconnecting and being arranged below the lower ends two opposite bars 15A, respectively two opposite bars 15B. The friction linings 18 are therefore parallel to the support axis of the coil 2 and are each covered, on their side facing coil 2, a coating with a high coefficient of friction with respect to the material constituting the turns 20 of the coil, for example rubber. Preferably the contact surfaces of said coatings are rounded, ridges longitudinal can be provided on these surfaces. Preferably, the spacing between the two opposite cross-pieces 15, respectively the length of the friction linings 18, is at least equal to the width of the strip of material constituting the coil 2.

    Dans la position représentée à la figure 1, la tige mobile 17A de l'actuateur 17 est en position rétractée, respectivement l'axe 16B est en position éloignée de l'axe 16A. En activant l'actuateur 17 de manière à rapprocher l'axe 16B de l'axe 16A, on obtient par un effet de ciseau des croisillons 15 un rapprochement des extrémités inférieures des barres 15A et 15B de chaque croisillon, respectivement un rapprochement des deux garnitures de frottement 18. Par le même effet de ciseau, les deux garnitures de frottement 18 s'abaissent légèrement en direction de la bobine 2. Durant le même mouvement, vu que chacune des barres 15A pivote autour de l'axe 16A, alors que chacune des barres 15B pivote en sens inverse autour de l'axe 16B, les extrémités de chacune des barres, respectivement les surfaces de contact des garnitures 18 pivotent légèrement l'une contre l'autre.In the position shown in Figure 1, the movable rod 17A of actuator 17 is in retracted position, respectively axis 16B is in position away from axis 16A. By activating actuator 17 so as to bring the axis 16B of the axis 16A, we obtain by a chisel effect of the braces 15 a approximation of the lower ends of bars 15A and 15B of each spider, respectively a bringing together of the two friction linings 18. By the same scissor effect, the two friction linings 18 are lowered slightly towards coil 2. During the same movement, seen that each of the bars 15A pivots around the axis 16A, while each bars 15B pivots in the opposite direction around the axis 16B, the ends of each of the bars, respectively the contact surfaces of the linings 18 swivel slightly against each other.

    On remarque en outre sur la figure 2 un dispositif de coupe 4, comportant en particulier une lame de coupe 40 et qui est disposé en position d'attente.We also note in Figure 2 a cutting device 4, comprising in particular a cutting blade 40 which is arranged in position Wait.

    Il est possible maintenant de décrire les différentes étapes du procédé de préparation de la coupe de la spire supérieure 21 de la bobine 2. Comme mentionné précédemment, la bobine 2 est immobile sur son axe support. En se référant aux figures 1 et 2, on voit que les moyens 30, permettant d'amener le dispositif de préparation 1 sont actionnés afin de positionner ledit dispositif à proximité de la spire supérieure 21, les deux garnitures de frottement 18 légèrement au-dessus de la spire 21, étant parallèles à l'axe de la bobine et n'étant pas en contact avec la spire 21 alors que la lame 13A est positionnée quelques dixièmes de mm en dessous de la surface supérieure de la spire supérieure 21. La distance par rapport à ladite surface supérieure à laquelle la lame plate 13A est disposée dépend essentiellement de l'épaisseur de la bande de matériau constituant la spire supérieure 21. Dans cette position, l'actuateur 10 maintient la tige mobile 11 en position rétractée, alors que l'actuateur 13B maintient la lame plate 13A en position rétractée et que l'actuateur 17 maintient l'axe 16B en position éloignée de l'axe 16A. La détermination de cette position de départ du dispositif 1 par rapport à la bobine 2 peut être faite manuellement ou automatiquement au moyen d'un dispositif détecteur de position (non représenté, mais pouvant être du même type que celui décrit plus bas en regard de la deuxième forme d'exécution du dispositif) couplé à une unité de commande 9, capable de déterminer que le dispositif est positionné correctement au-dessus de la spire 21 et que la lame plate 13A est positionnée correctement par rapport à ladite spire.It is now possible to describe the different stages of the process for preparing the cut of the upper turn 21 of the coil 2. As mentioned previously, the coil 2 is stationary on its support axis. Referring to Figures 1 and 2, we see that the means 30, allowing to bring the preparation device 1 are actuated in order to position said device near the upper turn 21, the two friction linings 18 slightly above the coil 21, being parallel to the axis of the coil and not being in contact with the coil 21 while the blade 13A is positioned a few tenths of a mm below the upper surface of the upper turn 21. The distance from said surface greater than which the flat blade 13A is arranged depends essentially on the thickness of the strip of material constituting the upper turn 21. In this position, the actuator 10 maintains the movable rod 11 in the retracted position, while the actuator 13B maintains the flat blade 13A in the retracted position and that the actuator 17 maintains the axis 16B in a position remote from the axis 16A. The determination from this starting position of the device 1 relative to the coil 2 can be done manually or automatically by means of a position (not shown, but may be of the same type as that described more bottom next to the second embodiment of the device) coupled to a control unit 9, capable of determining that the device is positioned correctly above the turn 21 and that the flat blade 13A is positioned correctly with respect to said turn.

    Dès cette position de départ atteinte, on actionne l'actuateur 17, qui rapproche l'axe 16B de l'axe 16A provoquant les mouvements décrits précédemment, soit une descente des surfaces de contact des garnitures de frottement 18 au contact et en appui sur la spire 21, et un rapprochement des deux dites garnitures accompagnées de leur mouvement de pivotement. Ces mouvements des deux garnitures 18 ont suffi, dès que celles-ci sont entrées en contact avec la spire supérieure 21, à la pincer légèrement puis à la soulever et créer une arche 21A entre les deux garnitures 18, comme on le voit à la figure 3. Cette arche 21A sur la spire 21 est donc provoquée par la combinaison des mouvements décrits, tout d'abord un fort contact entre les garnitures 18 et deux surfaces distantes de la spire 21, puis par le rapprochement et le pivotement des deux garnitures qui, vu le fort coefficient de friction de leur revêtement, ne glissent pas sur la spire 21. Lorsque l'arche 21A est créée, l'actuateur 17 est arrêté, alors que l'actuateur 13B est activé afin d'avancer la lame plate 13A de manière à ce que son extrémité passe dans l'espace compris sous l'arche 21A, soit entre la spire supérieure 21 et les spires des couches inférieures 20. A ce moment la lame plate 13A est maintenue dans cette position et le dispositif de coupe 4, respectivement la lame de coupe 40, est amené entre les barres du croisillon 15, directement au-dessus de l'arche 21. Les moyens par lesquels la lame 40 est actionnée ne font pas partie du dispositif de préparation selon l'invention, mais de l'un des dispositifs de coupe décrits dans l'un des brevets mentionnés en introduction. La lame 40 peut ainsi couper l'arche 21A, respectivement la spire supérieure 21 en ne s'enfonçant que jusqu'à la lame plate 13A contre laquelle elle vient finalement en butée. Ainsi, la lame plate 13A a protégé la première des spires des couches inférieures 20 qui ne peut donc pas être entamée par la lame 40. De préférence l'extrémité de la lame plate 13A pénétrant entre deux spires de la bobine 2 est de forme arrondie afin de ne pas blesser les spires. Dès que cette opération de coupe est faite, la lame de coupe 40 est retirée, puis la lame plate 13A par l'actuateur 13B, puis l'actuateur 10 est à nouveau actionné afin de séparer les garnitures 18 de la spire 21 et les moyens 30 éloignent le dispositif 1 de la bobine 2. Les moyens par lesquels l'extrémité supérieure de la spire 21 est saisie afin d'être amenée vers la machine de fabrication ne sont pas non plus décrits ici vu qu'ils le sont dans les brevets cités plus haut. Pour la clarté de l'exposé, il a été dit que la coupe ne s'effectuait que sur la spire supérieure 21, en fait l'arche 21A est formée de plusieurs des spires supérieures de la bobine, avec éventuellement la bande de protection mentionnée précédemment, faisant donc que plusieurs spires sont ensuite coupées. Ceci est plutôt un avantage dans la mesure où, si au moins deux spires sont coupées, on est sûr de ne pas retrouver dans la bande utilisable, l'endroit où l'extrémité de la spire supérieure a été collé sur la spire qui lui est directement inférieure. Les différents mouvements des actuateurs sont commandés par l'unité de commande 9.As soon as this starting position has been reached, actuator 17 is actuated, which brings the axis 16B closer to the axis 16A causing the movements described above, either a descent of the contact surfaces of the friction linings 18 in contact with and resting on the coil 21, and a bringing together of the two say fittings accompanied by their pivoting movement. These movements of the two linings 18 were sufficient, as soon as these entered contact with upper coil 21, pinch it slightly and then lift it and create an arch 21A between the two linings 18, as seen in the figure 3. This arch 21A on the coil 21 is therefore caused by the combination of the movements described, first of all a strong contact between the linings 18 and two surfaces distant from the coil 21, then by the bringing together and the pivoting of the two linings which, given the high coefficient of friction of their coating, do not slide on the coil 21. When the arch 21A is created, the actuator 17 is stopped, while the actuator 13B is activated in order to advance the flat blade 13A so that its end passes into the space included under the arch 21A, i.e. between the upper turn 21 and the turns of the lower layers 20. At this moment the flat blade 13A is held in this position and the device cutting blade 4, respectively the cutting blade 40, is brought between the bars of the cross 15, directly above the arch 21. The means by which the blade 40 is actuated are not part of the preparation device according to the invention, but from one of the cutting devices described in one of the patents mentioned in the introduction. The blade 40 can thus cut the arch 21A, respectively the upper turn 21 by sinking only to the blade plate 13A against which it finally comes into abutment. So the flat blade 13A has protected the first of the turns of the lower layers 20 which cannot therefore not be started by the blade 40. Preferably the end of the blade plate 13A penetrating between two turns of the coil 2 is of rounded shape so not to hurt the turns. As soon as this cutting operation is done, the cutting blade 40 is removed, then the flat blade 13A by the actuator 13B, then the actuator 10 is again actuated in order to separate the linings 18 from the turn 21 and the means 30 move the device 1 away from the coil 2. The means by which the upper end of the coil 21 is gripped in order to be brought to the manufacturing machine are also not described here since they are in the patents cited above. For the sake of clarity, it has been said that the cutting was carried out only on the upper turn 21, in fact the arch 21A is formed of several of the upper turns of the coil, possibly with the protective strip mentioned above, so that several turns are then cut. This is rather an advantage since, if at least two turns are cut, we are sure not to find in the usable tape, the place where the end of the upper coil was glued on the whorl which is directly inferior to it. The different movements of the actuators are controlled by the control unit 9.

    Le dispositif de préparation d'ouverture d'une bobine a été décrit ci-dessus selon une forme d'exécution préférentielle, il est évident que des variantes de cette forme d'exécution peuvent être prévues; en particulier il n'est pas du tout nécessaire que le dispositif 1 soit placé au-dessus de la bobine 2 selon une position verticale, en fait il pourrait être orienté selon n'importe quel angle par rapport au centre de la bobine, à condition que les angles relatifs des divers mouvements décrits soient conservés. De même les actionneurs décrits comme étant des vérins pneumatiques ou hydrauliques pourraient être constitués de n'importe quel élément susceptible de produire les mouvements décrits. Une autre forme d'exécution des moyens permettant de rapprocher les deux axes 16A et 16B pourrait aussi être prévue, par exemple une tige possédant deux sections filetées selon des directions inverses, mise en rotation par l'actionneur 17, chacune des sections filetées passant par un trou taraudé de l'axe 16A, respectivement de l'axe 16B. On aurait ainsi un rapprochement simultané des deux axes plutôt qu'un déplacement d'un seul axe. De même l'axe central 16 a été décrit comme étant disposé selon une position centrale de chacune des barres 15A et 15B; en fait il pourrait être décalé de manière à avoir un mouvement des garnitures 18 multiplié ou divisé par rapport au mouvement de rapprochement des deux axes 16A et 16B. Il est aussi possible de prévoir que le support 14 supportant les croisillons 15 et les garnitures de frottement 18 soit indépendant du support 12 supportant la lame 13A, de manière à pouvoir être éloigné de la bobine 2 après que la lame 13A ait été enfoncée dans la bobine afin de laisser, si nécessaire, une place suffisante au dispositif de coupe 4.The device for preparing the opening of a reel has been described above according to a preferred embodiment, it is obvious that variants of this embodiment can be provided; in particular it is not not at all necessary that the device 1 be placed above the coil 2 in a vertical position, in fact it could be oriented in any angle to the center of the spool, provided that the relative angles of the various movements described are preserved. Likewise the actuators described as being pneumatic or hydraulic cylinders could be made of any element capable of producing the movements described. Another embodiment of the means making it possible to bring the two axes 16A and 16B could also be provided, for example a rod having two sections threaded in opposite directions, rotated by the actuator 17, each of the threaded sections passing through a threaded hole of axis 16A, respectively axis 16B. We would thus have a simultaneous reconciliation of the two axes rather than a displacement of a single axis. Similarly the axis central 16 has been described as being disposed in a central position of each of the bars 15A and 15B; in fact it could be shifted so that have a movement of the linings 18 multiplied or divided with respect to the movement bringing together the two axes 16A and 16B. It is also possible to provide that the support 14 supporting the cross-pieces 15 and the friction linings 18 is independent of the support 12 supporting the blade 13A, so able to be moved away from the coil 2 after the blade 13A has been inserted in the coil in order to leave sufficient space for the device, if necessary cutting 4.

    Un autre forme d'exécution d'un dispositif de préparation d'ouverture d'une bobine est représentée aux figures 5 à 8.Another embodiment of an opening preparation device of a coil is shown in Figures 5 to 8.

    Comme précédemment, une bobine 2 comportant une pluralité de spires 20 et en particulier une spire supérieure 21 est fixée sur un axe support non représenté. Le dispositif de préparation est ici composé d'un dispositif porte lame 5, d'un dispositif de détection de position 6 et d'une unité de commande 9; il peut être complété d'un dispositif de soufflage 7. Ces différents éléments sont représentés séparés les uns des autres afin de rendre les figures plus claires, mais il est évident qu'ils font partie du même ensemble et sont reliés à une platine commune comportant des moyens de déplacement aptes à amener lesdits éléments en position d'action proche de la bobine 2. Le dispositif porte lame 5 comprend une lame plate 50, absolument semblable à la lame plate 13A décrite plus haut, et pouvant comme elle prendre une position rétractée, comme sur la figure 6, ou une position avancée, comme sur la figure 8, sous l'effet d'un actionneur 51. Le porte lame 5 est monté sur un autre actionneur 52 apte à positionner très précisément la lame plate 50 par rapport à la spire supérieure 21 de la bobine 2 comme on le verra plus bas. Vu que les bobines à ouvrir peuvent ne pas toutes avoir le même diamètre, il est nécessaire de détecter la position de la spire supérieure 21. Pour ceci, il est prévu un dispositif de détection de position 6 de ladite spire supérieure, constitué d'un autre actionneur 60 équipé d'un élément de touche 61, de préférence une roulette, qui, positionné premièrement nettement au-dessus de la spire supérieure 21, comme représenté à la figure 5, abaisse ensuite le doigt de touche 61 jusqu'à ce qu'il entre en contact avec la spire supérieure 21, comme on le voit à la figure 7. Cette position est relevée par l'unité de commande 9 qui peut alors activer l'actionneur 52 afin de placer la lame plate 50 quelques dixièmes de mm en dessous de la cote correspondant à la surface supérieure de la spire supérieure 21. La distance par rapport à ladite surface supérieure à laquelle la lame plate 50 est disposée dépend essentiellement de l'épaisseur de la bande de matériau constituant la bobine 2. Tenant compte du fait que les spires de la bobine 2 ne sont pas trop serrées, la lame 50 est doucement introduite sous la spire supérieure 21, de préférence pour la raison indiquée précédemment en regard de la première forme d'exécution, sous au moins deux des spires supérieures. Ce mouvement d'avance de la lame plate 50 peut être effectué alors que la bobine 2 est immobile ou alors lorsque celle-ci est animée d'un lent mouvement de rotation dans la direction allant de la roulette 61 vers la lame plate 50. De préférence la direction de ce mouvement de rotation est opposée à celle du déroulement normal de la bobine afin que, durant ce mouvement de rotation, la lame plate 50 tende à être repoussée vers le haut de par l'enroulement en spirale des spires de la bobine. Durant ce mouvement de rotation, la roulette 61 peut continuer de détecter la position de la couche supérieure 21 afin de corriger la position de la lame plate 50 dans le cas où la bobine 2 n'est pas exactement circulaire. Dès que la lame plate 50 est complètement enfoncée, la bobine est stoppée au cas où elle aurait été mise en rotation et, comme pour la première forme d'exécution décrite, un dispositif de coupe 4 est approché afin de couper les spires disposées au-dessus de la lame plate 50, en ne coupant que celles-ci, le mouvement de coupe étant limité par la lame plate 50. Comme représenté à la figure 6, le dispositif de préparation peut être complété par un dispositif de soufflage 7, composé essentiellement d'une buse de soufflage 70, qui projette un jet d'air sous pression directement au-dessus de la lame plate 50, en direction de la bobine 2, afin d'aider à soulever les spires supérieures, facilitant ainsi la pénétration de la lame plate 50. Les moyens de détection 6 peuvent aussi être conçus de manière à ne pas entrer en contact avec la spire supérieure 21, par exemple être constitués de moyens de détection optiques.As before, a coil 2 comprising a plurality of turns 20 and in particular an upper turn 21 is fixed on a support axis not shown. The preparation device is here composed of a device blade holder 5, a position detection device 6 and a control unit 9; it can be completed with a blowing device 7. These different elements are shown separated from each other to make the figures clearer, but it is obvious that they are part of the same whole and are connected to a common plate comprising displacement means suitable for bringing said elements into an action position close to coil 2. The device blade holder 5 includes a flat blade 50, absolutely similar to the blade plate 13A described above, and being able to take a retracted position, as in figure 6, or an advanced position, as in figure 8, under the effect of an actuator 51. The blade holder 5 is mounted on another actuator 52 able to very precisely position the flat blade 50 relative to the upper turn 21 of the coil 2 as will be seen below. Since the coils to open may not all have the same diameter, it is necessary to detect the position of the upper turn 21. For this, a device is provided 6 position detection of said upper turn, consisting of another actuator 60 fitted with a touch element 61, preferably a roller, which, positioned first clearly above the upper turn 21, as shown in Figure 5, then lowers the finger 61 to what it comes into contact with the upper turn 21, as seen in the Figure 7. This position is noted by the control unit 9 which can then activate the actuator 52 in order to place the flat blade 50 a few tenths of mm below the dimension corresponding to the upper surface of the coil upper 21. The distance from said upper surface at which the flat blade 50 is arranged essentially depends on the thickness of the strip of material constituting the coil 2. Taking into account that the turns of the coil 2 are not too tight, the blade 50 is gently inserted under the upper turn 21, preferably for the reason indicated above in look of the first embodiment, under at least two of the upper turns. This advance movement of the flat blade 50 can then be carried out the coil 2 is stationary or when it is animated by a slow rotational movement in the direction from roller 61 towards the blade flat 50. Preferably the direction of this rotational movement is opposite to that of the normal unwinding of the reel so that, during this movement of rotation, the flat blade 50 tends to be pushed up by the winding in spiral of the coil turns. During this rotational movement, the roller 61 can continue to detect the position of the upper layer 21 in order to correct the position of the flat blade 50 in the case where the coil 2 is not not exactly circular. As soon as the flat blade 50 is fully inserted, the spool is stopped in case it has been rotated and, as for the first embodiment described, a cutting device 4 is approached in order to cut the turns arranged above the flat blade 50, by not cutting only these, the cutting movement being limited by the flat blade 50. As shown in Figure 6, the preparation device can be completed by a blowing device 7, essentially consisting of a blowing nozzle 70, which projects a jet of pressurized air directly above the flat blade 50, in the direction of the coil 2, in order to help lift the turns superior, thus facilitating the penetration of the flat blade 50. The means of detection 6 can also be designed so as not to come into contact with the upper turn 21, for example be made up of detection means optics.

    Un dispositif de préparation, selon l'une ou l'autre des formes d'exécution ou des variantes décrites plus haut, permet, en coopération avec un dispositif de coupe et de saisie des spires supérieures d'une bobine, d'obtenir une bande de matériau intacte pour un usage ultérieur, ladite bande n'ayant pu être endommagée par le dispositif de coupe.A preparation device, according to one or other of the embodiments or variants described above, allows, in cooperation with a device cutting and gripping the upper turns of a coil, obtaining a strip of intact material for later use, said strip having not been damaged by the cutting device.

    Claims (17)

    1. Method for preparing the opening of a reel (2), made up of a strip of flexible material rolled in superimposed turns (20) and having an upper turn (21), the free end of which is fixed on the turn that is directly beneath it, the said reel being disposed on a support shaft and having two parallel flanks (22), the opening of the reel being prepared by acting upon its entire width, this method being characterised in that a flat blade (13A; 50) is inserted between two successive turns (20, 21) through the flank (22) of the reel, at least one turn (21) being disposed over the flat blade.
    2. Method according to claim 1, characterised in that two friction fittings (18) made up of two elongated elements, parallel and disposed parallel to the support shaft of the reel (2), are applied simultaneously with a certain pressure on two surface portions of the upper turn (21), the two friction fittings (18) being then brought slightly toward one another in such a way that each drives the portion of surface on which it is pressed in order to form an arch (21A) made up of a portion of at least the upper turn (21), the flat blade (13A) being then inserted under the said arch (21A).
    3. Method according to claim 2, characterised in that each of the two friction fittings (18) is, in addition, driven in a rotation movement about a shaft (16A, 16B), parallel to the shaft of the reel (2), each of the two said rotation movements being of opposite direction and tending to create the said arch (21A).
    4. Method according to claim 1, characterised in that means of blowing (7) an air jet are provided in order to lift at least the upper turn (21) during the insertion of the flat blade (50).
    5. Method according to one of the preceding claims, characterised in that the reel (2) is immobile during all the steps of the method.
    6. Method according to one of the claims 1 or 4, characterised in that the reel (2) is driven in a rotation movement at reduced speed during the insertion of the flat blade (50).
    7. Method according to claim 6, characterised in that a small wheel (61) is pressed on the upper turn (21) during the insertion of the flat blade (50).
    8. Method according to one of the preceding claims, characterised in that after insertion of the flat blade (13A; 50), the opening of the reel can be ordered by activating a cutting device (4) including a cutting blade (40) for a cutting operation, severing only the turn or turns (21) disposed over the flat blade (13A; 50), the said cutting blade (40) coming to abut against the said flat blade (13A; 50) after the said cutting operation.
    9. Method for preparing the opening of a reel (2) made up of a strip of flexible material rolled in superimposed turns (20) and having an upper turn (21) the free end of which is fixed on the turn that is directly beneath it, the said reel (2) being disposed on a support shaft and having two parallel flanks (22), the opening of the reel being prepared by acting upon its entire width, this device being characterised in that it comprises in particular a flat blade (13A; 50) mounted on a blade support (13, 5), the said blade support being mounted on displacement means (10, 52) able to position the flat blade (13A; 50) at a predetermined distance from the upper surface of the upper turn (21) and having other displacement means (13B; 51) able to make the flat blade (13A; 50) advance between two successive turns (21, 20) through the flank (22) of the reel.
    10. Device according to claim 9, characterised in that it further comprises two friction fittings (18) made up of two elongated elements, parallel and disposed parallel to the support shaft of the reel, able to be applied simultaneously with a certain pressure on two surface portions of the upper turn (21), the two friction fittings (18) being then able to be brought slightly toward one another in such a way that each drives the portion of surface on which it is pressed in order to form an arch (21A) made up of a portion of at least the upper turn (21), the flat blade (13A) then being able to be inserted under the said arch (21A).
    11. Device according to claim 10, characterised in that it further comprises two crosspieces (15) disposed opposite in two planes spaced apart and parallel to the flanks (22) of the reel (2), each of the said crosspieces (15) being made up of a pair of bars (15A, 15B), the bars (15A, 15B) of each of the said crosspieces (15) and the crosspieces between themselves being connected by a central pivoting shaft (16) parallel to the support shaft of the reel (2) and passing through a generally central position of each bar (15A, 15B), the lower ends of each of the two opposite bars of the two crosspieces (15) being connected by a friction fitting (18) parallel to one another and to the support shaft of the reel (2), the upper ends of each of the two opposite bars of the two crosspieces (15) being connected through an upper shaft (16A, 16B) parallel to one another and to the support shaft of the reel (2), at least one of the said upper axes (16B) being able to be driven by the displacement means (17, 17A) in order to bring together the said upper axes (16A, 16B) in a direction perpendicular to the axis of the reel (2) and to the diameter of the reel passing through the said central shaft (16), the coming together of the said upper axes (16A, 16B) causing, through a scissors effect of each of the crosspieces (15), a pressing of each of the friction fittings (18) on a surface portion of the upper turn (21), a bringing together and a pivoting in opposite directions of each of the two friction fittings (18) in order to form an arch (21A) made up of a portion of at least the upper turn (21).
    12. Device according to one of the claims 10 or 11, characterised in that the friction fittings (18) are covered by a material having a strong coefficient of friction with respect to the material making up the upper turn (21).
    13. Device according to one of the claims 9 to 12, characterised in that it further comprises means of detection (6, 61) of the position of the upper turn (21) as well as control means (9) able to order the displacement of the flat blade (13A; 50) in position for penetrating between two turns (20, 21) of the reel, according to the detected position of the upper turn (21).
    14. Device according to claim 9, characterised in that it further comprises means of projection (7, 70) of a jet of air oriented in the direction of the upper surface of the flat blade (50) as well as of the flank (22) of the reel (2).
    15. Device according to one of the claims 9 to 14, characterised in that it further comprises means making it possible to keep the reel (2) immobile.
    16. Device according to one of the claims 9, 13 or 14, characterised in that it further comprises means making it possible to set the reel (2) in rotation about its support shaft at a low speed.
    17. Device according to one of the claims 9 to 16, characterised in that it is associated with a device for cutting and grasping the cut end of the upper turn (21) including in particular a cutting blade (40) being able to sever the turn or turns (21) disposed over the flat blade (13A; 50), the said cutting blade (40) coming to abut against the said flat blade (13A; 50) after the cutting operation.
    EP94810716A 1994-12-12 1994-12-12 Method and device for preparing the opening of a reel Expired - Lifetime EP0721905B1 (en)

    Priority Applications (5)

    Application Number Priority Date Filing Date Title
    EP94810716A EP0721905B1 (en) 1994-12-12 1994-12-12 Method and device for preparing the opening of a reel
    DE69430064T DE69430064T2 (en) 1994-12-12 1994-12-12 Method and device for preparing the opening of a web wrap
    DE69522303T DE69522303T2 (en) 1994-12-12 1995-12-01 Method and device for preparing and opening a web roll
    EP95810754A EP0716996B1 (en) 1994-12-12 1995-12-01 Method and device for preparing and opening of a reel
    US08/570,278 US6227088B1 (en) 1994-12-12 1995-12-11 Apparatus for opening paper bobbins

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP94810716A EP0721905B1 (en) 1994-12-12 1994-12-12 Method and device for preparing the opening of a reel

    Publications (2)

    Publication Number Publication Date
    EP0721905A1 EP0721905A1 (en) 1996-07-17
    EP0721905B1 true EP0721905B1 (en) 2002-03-06

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    EP94810716A Expired - Lifetime EP0721905B1 (en) 1994-12-12 1994-12-12 Method and device for preparing the opening of a reel

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    US (1) US6227088B1 (en)
    EP (1) EP0721905B1 (en)
    DE (2) DE69430064T2 (en)

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    Publication number Publication date
    DE69522303T2 (en) 2002-06-27
    DE69430064T2 (en) 2002-10-10
    US6227088B1 (en) 2001-05-08
    DE69430064D1 (en) 2002-04-11
    DE69522303D1 (en) 2001-09-27
    EP0721905A1 (en) 1996-07-17

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