EP1647508A1 - Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines - Google Patents

Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines Download PDF

Info

Publication number
EP1647508A1
EP1647508A1 EP04425770A EP04425770A EP1647508A1 EP 1647508 A1 EP1647508 A1 EP 1647508A1 EP 04425770 A EP04425770 A EP 04425770A EP 04425770 A EP04425770 A EP 04425770A EP 1647508 A1 EP1647508 A1 EP 1647508A1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
arms
stations
unwinding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04425770A
Other languages
German (de)
English (en)
Inventor
Mauro Adami
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.)
Fosber SpA
Original Assignee
Fosber SpA
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 Fosber SpA filed Critical Fosber SpA
Priority to EP04425770A priority Critical patent/EP1647508A1/fr
Publication of EP1647508A1 publication Critical patent/EP1647508A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
    • B65H19/126—Lifting, transporting, or inserting the web roll; Removing empty core with both-ends supporting arrangements

Definitions

  • the present invention relates to a roll stand device, that is, an unwinding device for rolls of web material to feed to a production line.
  • a roll stand device that is, an unwinding device for rolls of web material to feed to a production line.
  • the present invention relates to a roll stand or roll unwinding device to feed webs of paper or cardboard to a corrugator system, that is, to a system for the production of corrugated cardboard.
  • the invention also relates to a device for lifting rolls in a roll unwinding device or roll stand, and to a method for handling the rolls in an unwinding device.
  • the "wet-end" section of the production line which is the section containing the machines used to perform corrugation of the paper webs, glue them to smooth webs to form the layer (or layers) of corrugated cardboard, and dry the web material thereby obtained, must be fed with a number of rolls of web material corresponding to the number of layers or sheets of paper required to produce the corrugated cardboard.
  • three paper webs must be fed simultaneously: the two webs forming the outer liners and the intermediate corrugated sheet.
  • the web rolls must be replaced frequently, not only when they finish but also and especially as a function of the production cycles or work orders, which follow one another in quick succession.
  • the system often processes very small orders for very short times and the paper rolls to be fed to the corrugator must be replaced between one order and the next. Replacement is necessary as successive orders may require different types of paper.
  • the roll replacement phase is, therefore, a critical aspect of the production cycle and affects the total hourly production rate. Even a small reduction in the time required to replace a roll can produce considerable advantages in terms of productivity.
  • the rolls which are removed from the unwinding device to be replaced with others after processing of one work order has terminated and before starting to process the following order are re-used subsequently, when required to process other orders.
  • this entails the further difficulty of having to handle rolls with diameters that vary greatly using the same device.
  • a half-used roll which is unloaded after processing an order can be re-used in a subsequent processing cycle at a later date. Therefore, the unwinding device must be capable of handling rolls with different diameters.
  • unwinding device comprises two lateral loading stations for new rolls and one central unloading station for the finished roll or the roll which must be replaced to process a different order with respect to the current one.
  • unwinding devices of this kind are described in US-A-4,919,353, US-A-5,004,173, US-A-4,735,372 and JP-A-7-157156.
  • unwinding devices are equipped with two pairs of oscillating arms which pick up the rolls from the lateral loading stations and carry them to an unwinding position and, at the end of processing, place them in the unloading station.
  • US-A-4.,919,353 describes an unwinding device with three stations, with two pairs of arms oscillating about fixed axes. Associated with the three stations are carriages which convey the rolls, inserting them in or removing them from the stations with a movement parallel to their axis. The carriages are each equipped with pantograph lifting systems to lift and lower the rolls and are housed in compartments produced below the level of the floor.
  • US-A-5,004,173 describes an unwinding device with three stations, with two pairs of arms oscillating about fixed axes.
  • the three stations are equipped with pantograph lifting systems, housed in compartments produced under the level of the floor. The movement of these lifting systems is controlled by optical sensors associated with the oscillating arms used to engage the rolls.
  • JP-A-11-11749 describes an unwinding device provided with a pair of oscillating arms, which pick up and lift the roll, equipped with a diameter sensor which detects the diameter of the roll to be loaded onto the unwinding device and controls arm movement according to the diameter value detected.
  • US-A-4,706,905 describes a roll stand or unwinding device for corrugators, equipped with two pairs of arms which pick up the new rolls from moving carriages, onto which rolls to be replaced are also unloaded.
  • the arms are provided both with an oscillating movement about a horizontal axis parallel to the axis of the rolls and with a lifting and lowering movement of the axis of oscillation of said arms.
  • the system is complex and, furthermore, the use of two pairs of arms which operate in only two stations makes roll change a lengthy operation with negative effects on the total production rate of the processing line in which the roll stands are inserted.
  • US-A-4,930,713 describes a roll stand or paper roll unwinding device for a corrugator which tackles the problem of differences in roll diameter by mounting the two pairs of arms on axes of oscillation, which are in turn provided with an eccentric movement. In this way, the centers or cones provided on the arms can move along a vertical trajectory. Also in this case, the system is complex and, moreover, does not allow high speeds during the roll change operation.
  • US-A-5,755,395 describes an unwinding device or roll stand for corrugators in which in order to handle rolls with different diameters using oscillating arms, the carriage carrying the rolls is provided with a translatory movement in a direction orthogonal to the axis of oscillation of the arms.
  • the translation system of the carriage carrying the rolls is particularly complex. Furthermore, also in this case the system has only two loading and unloading stations and therefore roll change operations are slow.
  • US-A-6,267,320 describes an unwinding device or roll stand for corrugators which solves the problem of handling rolls with different diameters once again by modifying the position of the horizontal axis of oscillation of the arms which pick up and set down the rolls.
  • the system is complex and, also in this case, due to the presence of only two loading and unloading stations, roll replacement is slow and has negative effects on production rate.
  • EP-A-1,348,658 describes an unwinding device comprising a structure with a crosspiece along which two pairs of arms travel to engage the rolls to be unwound. Moreover, three stations are provided, including an intermediate one in which the roll to be removed from the unwinding device is placed and two lateral stations in which rolls to replace the used ones removed from the intermediate station are inserted. The arms extend downwards from carriages moving along the horizontal crosspiece and convey the rolls from one or other of the lateral stations to the central station. With respect to unwinding devices with oscillating arms, this unwinding device has numerous advantages described in detail in the publication EP-A-1,348,658. A different unwinding device with arms which travel on a horizontal crosspiece is described in JP-A-01-127550.
  • the object of the present invention is to produce a roll stand or roll unwinding device specifically intended for corrugating systems, that is, for the production of corrugated cardboard, which is more efficient than conventional devices, reduces the time required to replace the rolls and allows effective and fast handling even of rolls with substantially different diameters using simple and low cost devices.
  • the object of the present invention is to produce a lifting device, that is, a lifting and lowering device for handling rolls in an unwinding device.
  • the object of the present invention is to propose a method to handle rolls in an unwinding device, which allows a faster roll replacement cycle.
  • unwinding device generically refers to a device suitable to receive a roll of web material which is fed to a system downstream.
  • the term therefore also comprises devices commonly referred to as roll stands in this specific
  • an unwinding device for rolls of web material comprising: at least two stations for the rolls; members to engage the rolls in said stations; transfer devices to insert the rolls in and remove them from said stations; and in at least one of said two stations a device to lift and lower the rolls.
  • This device typically comprises a pair of arms oscillating at least approximately synchronously and in opposite directions about respective axes essentially parallel to the axis of the roll, said arms each being equipped with at least a contact member with the respective roll, oscillation of the arms lifting or lowering the roll in contact with said members.
  • reciprocal connecting means can be associated with the lifting and lowering arms of the device, to cause the two arms of said pair to oscillate at least approximately synchronously and in opposite directions.
  • the unwinding device comprises at least three loading and/or unloading stations for the rolls and a supporting structure, with a supporting crosspiece, extending above said three stations, along which two separate and autonomous roll engaging and supporting members travel, to move said rolls from a first to a second of said three stations.
  • the engaging and supporting members are preferably maintained at a fixed height, to which and from which the rolls are carried or picked up by the lifting and lowering device.
  • the unwinding device can comprise two lateral roll loading stations and an intermediate used roll unloading station, or an intermediate roll loading station and two lateral roll unloading stations.
  • the lifting and lowering device or devices are fixed in the respective loading or unloading stations, that is, they do not move with the means which insert the rolls in and remove them from the unwinding device.
  • each of the loading and/or unloading stations is provided with respective lifting and lowering devices, which can be essentially the same as each other, at least with regard to the kinematic systems which provide the lifting and lowering movement.
  • this configuration allows precise and safe roll control, as the contact members define supporting points of the roll which are at a considerable distance from one another, resulting in improved roll control.
  • the wide supporting surface obtained and the movement of the oscillating arms allow automatic axial alignment of any rolls which are misaligned with respect to the roll engaging members carried by the arms of the unwinding device.
  • the oscillating mechanism of the arms with the corresponding contact members to support rolls allows lifting devices to be placed almost entirely at floor level, or only slightly thereunder, with the advantage of reducing the building works necessary for installation of the system.
  • two opposed arms of each of the roll lifting and lowering devices are controlled by a common actuator.
  • the actuator can consist of a motor which rotates a ring gear, connected to one of the oscillating arms, while the other arm is controlled by a second ring rear meshing with the first.
  • the common actuator is a linear actuator, in particular and preferably a piston-cylinder actuator, connected to the two arms, which are also connected by a mechanical member, such as a tie-rod, so that extension and retraction of the linear actuator causes the two arms to oscillate essentially simultaneously and in opposite directions.
  • a linear actuator and a tie-rod when a linear actuator and a tie-rod are provided, at a first end the tie-rod and piston-cylinder actuator are hinged about a first common axis carried by a first arm of the lifting and lowering device, while at the second end they are hinged respectively about a second and a third axis, carried by the other arm of the lifting device.
  • These hinge axes are parallel to one another and to the axes of oscillation of the arms.
  • the common axis carried by the first of the two arms is at a greater height with respect to the height at which the axis of oscillation of the arm is disposed, while the second and the third axes are disposed respectively at a lower height and at a greater height to the axis of oscillation of the second arm.
  • a member to control the roll position disposed in each of the two loading stations is a member to control the roll position, to check when it has reached the correct height to be engaged by the engaging members.
  • the control member can also be used to check that the roll is correctly aligned, that is, that the axis thereof is parallel to the centers of the engaging and supporting members.
  • this control member can include an optical system with at least a transmitter and a receiver, which checks the position of the hollow axis of the roll.
  • the transmitter and receiver can be disposed indifferently one in a fixed position and the other on an oscillating arm or other moving support which retracts to allow passage of the roll and which in the operating position is aligned with the fixed element, the direction of alignment coinciding with the direction in which the axis of the roll must be found when correctly positioned and the height at which the transmitter and receiver are located in the operating position corresponding to the height to which the roll must be carried by the lifting and lowering device. Incorrect positioning of the roll (for example, a roll greatly misaligned or at a wrong height) is detected by absence of the signal on the receiver.
  • the transmitter and receiver could be disposed in proximity to each other on a common support, fixed or moving, and for a simple mirror to be provided on the other support (fixed or moving respectively).
  • the mirror is preferably on the moving and retractable support, while the transmitter-receiver is fixed. More than one transmitter-receiver may also be provided for purposes which will be explained below.
  • the invention relates to a method to handle rolls of web material in an unwinding device comprising at least two stations for the rolls, in said stations roll engaging members which hold the rolls at an unwinding height to unwind the web material from the rolls, and lifting and lowering devices for the rolls, characterized in that, by means of said lifting and lowering devices, the rolls are carried with their axis in correspondence with a position to be engaged by said engaging members, at a height corresponding to the unwinding height.
  • the method according to the invention provides, in said stations, members to control the position of the rolls, to control the lifting movement of the rolls and to carry the respective roll to the engaging position, irrespective of the position of the respective engaging member.
  • the method comprises the phases of:
  • the method comprises the phases of:
  • a particularly fast operating cycle is obtained, in practice, with an unwinding device comprising at least two stations and preferably three stations for the rolls; roll engaging members in said stations; in at least one of said two stations a lifting and lowering device for the rolls, disposed and designed to carry said rolls to an unwinding height, in correspondence with which they are engaged by said engaging members; in the loading stations of the rolls, a member to control the height of the rolls, to control movement of the lifting and lowering device, irrespective of the position of the engaging members.
  • Figure 1 shows the overall structure of a possible unwinding device incorporating the present invention.
  • the unwinding device shown in the example comprises a supporting gantry structure, indicated as a whole with 1.
  • the gantry structure comprises four uprights 3 arranged at the vertices of a rectangular plan of the device.
  • the uprights 3 are reciprocally joined by beams 7, which form a crosspiece indicated as a whole with 11 of the gantry structure consisting of the four uprights 3.
  • the numbers 13 and 15 indicate two lateral stations, hereinafter lateral loading stations, while the number 17 indicates an intermediate station disposed between the two lateral loading stations, hereinafter intermediate station or central unloading station.
  • each lateral loading station the rolls are inserted by a transferring device comprising a carriage indicated with 8, 10 for the stations 13, 15 respectively.
  • a similar carriage 12 is provided to remove the rolls from the intermediate unloading station.
  • Each carriage 8, 10, 12 has an upper supporting cradle 8A, 10A, 12A with a V-profile, which supports the roll transported by the carriage each time.
  • This supporting cradle is at a height approximately at the level of or slightly above the floor P of the building in which the unwinding device is installed.
  • the carriage can be replaced by a catenary, i.e. a continuous conveyor.
  • the rolls are inserted in the lateral loading stations 13, 15 by a movement parallel to the axis of said rolls and are delivered from the same side of the gantry structure 1.
  • the rolls to be delivered from the intermediate unloading station 17 can be removed from the same side on which the rolls are inserted in the lateral loading stations, with a movement in the opposite direction with respect to the insertion movement; otherwise, they can be removed from the opposite side, with a movement in the same direction as the insertion movement.
  • the first solution is chosen when the device is positioned in proximity to an obstacle which prevents access to the stations 13, 15, 17 from one of the sides of said device, for example when the device is disposed adjacent to a perimeter wall of the building, or when all the roll handling means are required to be positioned on the same side of the unwinding device.
  • Slides or carriages 19A, 19B each carrying a pair of engaging and supporting members 21A, 21 B of the respective rolls of cardboard or other web material to be unwound, travel along the crosspiece 11.
  • Each of the two engaging members 21A, 21B comprises a pair of arms 23A, 23B extending downwards and each equipped with centers 25A, 25B.
  • Normally one of the centers of each pair of arms can be motorized, by a motor 27A, 27B to draw the roll in rotation and the other can be equipped with a brake, which starts to operate when rotation of the roll must be slowed down or stopped.
  • Other arrangements are also possible, for example with a system to draw the web material downstream of the centers, which in this case are not motorized.
  • the arms 23A, 23B have a reciprocal advancing and retracting movement to insert the centers in and remove them from the axial hole of the roll.
  • roll lifting and lowering devices Disposed in the stations 13, 15 and 17 are roll lifting and lowering devices, indicated with 31, 33 and 35 respectively, which shall be illustrated in greater detail below.
  • the devices 31 and 33 associated with the lateral loading stations 13 and 15 are the same as each other, while the structure of the device associated with the intermediate unloading station 33 is slightly different for reasons and objects to be explained below.
  • a stock of web material composed of a festoon defined by a roller with fixed axis 40, a pair of rollers 41, 43 carried by a carriage 45 which can travel along the crosspiece 11 and by a roller 47.
  • a splicing device is also disposed along the crosspiece 11, to join the final edge of a roll that has finished or must be replaced with the initial edge of a new roll.
  • the splicing device can have any suitable known configuration.
  • Other examples of splicing devices suitable to be used in this type of unwinding device are described in the co-pending European patent applications n. 04425447 and 03425616 and in the co-pending US patent application n. 10/668160 by the same applicant.
  • FIG. 1 the arms 23A carried by the carriage 19A support a first roll BA which is rotating and unwinding a web material NA.
  • the roll BA is in the central unloading station 17.
  • the roll BB is not rotating and the initial free edge LB of the web material NB wound on the roll BB is prepared to be joined by the splicing device (not shown) to the final edge of the web material NA.
  • the carriage 10 is disengaged and can therefore be retracted from the station 15 to receive a new roll destined to be used in a subsequent cycle.
  • a third roll BC has been conveyed to the lateral loading station 13 by the carriage 8 and has already been lifted by the lifting device 31. Therefore, also in this case the carriage 8 is disengaged and can retract from the unwinding device to receive a new roll.
  • the height to which the roll BC is brought is the same height at which the remaining rolls BA and BB are positioned, that is, the height at which the roll is held to be unwound by the unwinding device.
  • FIG 2 shows the phase subsequent to interruption of feed from the roll BA and starting to unwind the web material NB from the roll BB.
  • the phase to splice the two materials NA, NB is not shown and is intermediate with respect to the two phases in Figures 1 and 2.
  • the roll BB is now rotating but is still in the station 15.
  • the roll BA is still held by the arms 23A but is not rotating and ready to be unloaded. It can be observed that the roll BA is not finished. This means that replacement of one roll with another is not necessarily carried out when the web material has terminated. On the contrary, in the majority of cases replacement takes place when the roll being unwound still contains material. Replacement is required due to a change in the order being processed.
  • the lifting and lowering device 35 associated with the station 17 has been lifted to allow the roll BA to be laid on top of it by opening of the arms 23A.
  • Figure 3 shows a subsequent phase, in which the roll BA has been placed on the lifting and lowering device 35, which has in turn placed the roll BA on the carriage 12.
  • the arms 23A which have been disengaged from the roll BA are transferred to the station 13 to pick up the roll BC.
  • the roll BB is still in the station 15.
  • the initial edge LC of the roll BC will be spliced to the tail edge of the web NB, the roll BC will start to unwind the web material NC and the roll BB will be unloaded onto the carriage 12 and retracted.
  • the entire sequence described for the rolls BA, BB and BC will be repeated symmetrically for the roll BB, BC and BD, and so on.
  • the configuration of the engaging and supporting members of the rolls comprising the arms 23A, 23B and of the lifting and lowering devices 31, 33, 35 allows a very fast operating sequence to be obtained.
  • the lifting and lowering devices immediately disengage the carriages 8, 10 of the loading stations and center the rolls while they are being lifted. Centering is guaranteed in the manner to be described below. In this way, the rolls are ready to be rapidly engaged by the centers of the arms 23A, 23B and can be prepared to be subsequently processed. The entire operating cycle is much faster than is possible with other types of currently known unwinding devices.
  • the device 31 comprises a pair of oscillating arms, indicated with 51 and 53, hinged about respective axes of oscillation 51A and 53A.
  • the supports of the axes of oscillation are connected to a fixed structure comprising the uprights 3 and further intermediate supports 4 connected to one another and to the uprights 3 by a frame formed of beams 6 positioned under the floor P.
  • the arm 51 is formed of two side elements 55, 57 oscillating about the axis 51A and joined to each other by a bar or crosspiece 59.
  • the two side elements 55, 57 are positioned on the two sides of the device. In the view in Figures 5 and 6, the side element 55 is in front of the side element 57.
  • the arm 53 is formed by two side elements 61, 63 oscillating about the axis 53A and joined by a bar or crosspiece 65.
  • the side elements 55 and 61 are joined to each other by a piston-cylinder actuator 67.
  • the cylinder of the actuator 67 is connected to the side element 55 of the arm 51 at the level of an axis A, while the rod of the piston is connected to the side element 61 at the level of an axis B.
  • the first end of a tie-rod 69 is also connected to the oscillating side element 61, while the second end thereof is connected to the side element 55 of the arm 51 at the level of a further axis C.
  • the axes A and B are positioned under the horizontal plane of the axes 51A and 53A of oscillation of the arms 51, 53, while the axis C is positioned above this plane, irrespective of the position of the device (whether in the lowered position in Figure 5 or in the lifted position in Figure 6).
  • the tie-rod 69 forms a connection between the arms 51, 53 which guarantees essentially symmetrical oscillation (that is, essentially simultaneous and in opposite directions) of the two arms through the effect of extension and retraction of the piston-cylinder actuator 67.
  • the arms 51, 53 are lowered and the actuator 67 is extended, while in Figure 6 the arms 51, 53 are lifted and the actuator 67 is retracted.
  • the arms, the tie-rod 69 and the actuator 67 are arranged to reduce the stresses and forces required to lift the rolls by means of the oscillating arms.
  • Each of the bars or crosspieces 59, 65 carries four supporting elements 71 (see in particular Figure 7 for the arm 51, the arrangement on the arm 53 being symmetrical) which support two idle wheels 73 and an intermediate idle roller 75.
  • the axes of the wheels 73 of each arm are coincident, but do not coincide with the axis of the roller 75, which is at a greater distance from the respective bar or crosspiece 59, 65.
  • the two pairs of wheels 73 constitute a first contact member for the rolls, while the two rollers 75 form a second contact member for the rolls.
  • the arrangement of the axes and the dimensions of the diameters of the wheels 73 and of the rollers 75 are such that the wheels 73 are used to handle rolls with larger diameters and the rollers 75 are used to handle rolls with smaller diameters.
  • the supporting elements 71 connected rigidly to the crosspieces 59, 65 also carry three shaped plates indicated with 77, 79 and 81.
  • the plate 77 partly surrounds the central roller 75, while the plates 79 and 81 are disposed external to the wheel 73, and extend for approximately the same length as the profile of the wheel 73.
  • These plates form auxiliary supporting surfaces for the rolls in the event that they are positioned incorrectly.
  • the lifting and lowering device 35 positioned in the intermediate unloading station 17 has a conformation similar to the devices 31, 33 and is shown in detail in Figures 8 and 9, respectively in a lowered and lifted position.
  • the device comprises a pair of arms 91, 93, oscillating about axes of oscillation which coincide respectively with the axis 53A of oscillation of the arm 53 of the device 31 and with the axis 51A of oscillation of the arm 51 of the device 33.
  • the arm 91 is composed of oscillating side elements 94, 95 joined by a crosspiece or bar 96, while the arm 93 is composed of oscillating side elements 97, 98, joined by a tubular element 99.
  • the crosspiece 96 supports an idle roller 100, with a diameter essentially the same as the diameter of the tubular element 99.
  • the roller 100 and the tubular element 99 form the contact members with the rolls.
  • the side elements 94 and 97 are joined to each other by a piston-cylinder actuator 101 connected in A1 to the side element 94 of the oscillating arm 91 and in B1 to the side element 97 of the arm 93.
  • the first end of a tie-rod 103 is also connected about the hinging axis B1, while the second end is connected in C1 to the side element 94 of the oscillating arm 91.
  • the arrangement is the same as the actuator 67 and the tie-rod 69 described with reference to Figures 5, 6 and 7 and has the same function, with reference to movement of the arms 91, 93.
  • the relative position of the axes A1, B1, C1, 51A, 53A is the same as the one described with reference to Figures 5, 6, and 7, with the axes A1, B1 below the horizontal plane of the axes 51A, 53A and the axis C1 above said plane.
  • the lifting and lowering devices 31, 33, 35 of the stations 13, 15, 17 have an essentially identical configuration, with the exception of the different form of the contact and supporting members of the rolls, which in the central device are simplified for reasons to be explained below.
  • the lifting and lowering devices have a very simple structure and form, with the respective contact members for the rolls, a very large supporting surface for said rolls.
  • the contact points between rolls and contact members are distanced from one another and these provide a stable support also for rolls with large diameters.
  • the axes of oscillation 51A, 53A of the various oscillating arms of the lifting and lowering devices are above the floor P and the lowest height to be reached by the device is limited. This allows minimization of the depth of the pit F which must be dug to house said devices and, consequently, simplifies and reduces the costs of installation.
  • the kinematic system used to mechanically connect the two oscillating arms of each device and to control synchronous oscillation in opposite directions is extremely simple, reliable and low-cost.
  • the movement performed by the oscillating arms allows correct alignment of the roll lifted each time from the respective device, with respect to the direction of alignment of the centers of the supporting and engaging members of said rolls.
  • the axis of a roll is not parallel to the direction of the axes of oscillation 51A, 53A of the arms 51, 53 of the lifting and lowering device 31 or 33, it is automatically aligned by the lifting thrust received from the wheels 73 or from the rollers 75. In this way, the roll lifted to the height of the centers 25A, 25B or 25C is positioned correctly with respect to the direction of alignment of said centers.
  • Each lifting and lowering device 31, 33 and 35 is provided with tie-rod 69, 103 and actuator 67, 101 disposed on the same side of the unwinding device, corresponding to the opposite side with respect to the one on which the rolls are inserted or removed.
  • the side views in Figures 1-6, 8 and 9 are shown from the side provided with the tie-rods and the actuators, with the hypothesis that the rolls are inserted and removed from the lateral stations 13, 15 and from the central station 17 always on the same side of the unwinding device. Nonetheless, this is not always necessary, as for example the rolls may be inserted on one side and removed from the opposite side.
  • the side elements 57, 63, 95, 98 of the arms 51, 53, 91, 93 are not joined to one another by intermediate mechanical elements, in order to leave the space required for passage of the rolls.
  • FIGS 5 to 9 schematically illustrate the carriages 8 and 12, which are essentially identical to each other and to the carriage 10.
  • the carriage 8 ( Figures 6, 7) will be described hereunder. It has a body formed by a C-shaped beam indicated with 8B, the legs of which are disposed vertically, provided with a V-shaped profile 8A on which the rolls are supported.
  • the carriage has a plurality of wheels 8C with which it is guided along a rail formed of a horizontal beam 8D. The movement is provided by a chain attached to the carriage and driven around two toothed wheels disposed at the ends of the path of the carriage.
  • the unwinding device also comprises a system to control that the rolls have been introduced correctly in the station and that the axis is correctly oriented. It also has the function of checking when the roll has reached the correct height to be engaged by the centers 25A or 25B of the arms 23A, 23B.
  • Figures 10 and 11 schematically illustrate this control system with reference to the lateral loading station 15. It is understood that the system associated with the station 13 is essentially symmetrical.
  • Figure 10 shows the side view of the station 15 on the roll introduction side, opposite the side shown in Figures 1 to 4.
  • An arm 121 oscillating about an axis 123 is hinged to the upright 3.
  • the arm 121 and its axis of oscillation 123 are positioned so that in the vertical position (dashed line in Figure 10) the arm 121 is housed inside the upright 3, between the legs of the beam forming said upright, while in the horizontal position (Figure 10, continuous line, Figure 11) it enters the volume defined by said uprights 3 and the distal end thereof, that is, farthest from the axis of oscillation 123, is positioned in proximity to the base of the roll (indicated generically with BA in Figure 11 and omitted in Figure 10) which is inserted correctly in the loading station 15.
  • the distal end of the arm 121 is provided with a mirror 125 which, when the arm 121 is in the horizontal operating position, is at the level of the trajectory of motion of the tubular core T of the roll which, inserted in the loading station by the carriage 10, is lifted by the lifting device 33.
  • the height at which the mirror is positioned coincides with the height of the centers 25A, 25B. In this way, during the movement to lift the roll caused by the lifting and lowering device 33, the tubular core T of the roll passes in front of the mirror 125. When it reaches this position the roll must be stopped, as its tubular core is in the position to be picked up by the centers 25A, 25B.
  • an optical system indicated as a whole and schematically with 127 in Figure 11, comprising a transmitter and a receiver positioned in proximity to each other.
  • the transmitter and receiver of the optical system 127 are aligned with the mirror 125, when this is in the operating position ( Figure 11, position with continuous line in Figure 10) according to a direction parallel to the direction of alignment of the centers 25A or 25B and of the axes of oscillation 51 A, 53A.
  • the optical beam emitted by the transmitter reaches the mirror 125 and is reflected by it towards the receiver, only when the tubular core T of the roll is aligned with the optical system 127 and with the mirror 125. Consequently, the receiver of the system 127 will emit an enabling signal only when the axis of the roll is in the correct position (height and angular positioning) to be engaged by the centers 25A or 25B.
  • a further position control of the roll can be performed to ensure that, although aligned with the mirror 125 and the optical system 127, the roll is not too far back in the axial direction, that is, not completely inserted in the loading station.
  • the arm 121 can be provided with a microswitch 129 ( Figure 10) which supplies an enabling signal when the arm 121 has reached the operating position. If a roll has not been inserted correctly in the loading station, the arm 121 (which is disposed inclined towards the inside of the unwinding device) will knock against it preventing it from reaching the operating position, thereby activating the microswitch 129. If the diameter of the roll is so small that, before being lifted, it does not reach the height of the arm 121, this can be lowered to the operating position without knocking against the roll, even if it is not correctly inserted in the loading station.
  • a microswitch 129 Figure 10
  • lifting the roll causes (before it reaches the height to be picked up by the engaging and supporting members) it to knock against the arm 121 and therefore be lifted.
  • This movement is detected by the microswitch 129 which emits an alarm signal to indicate incorrect roll positioning.
  • respective fixed limit stops are provided to prevent the rolls from exceeding the correct centering position with respect to the engaging and supporting members.
  • the following operating cycle can be performed.
  • the arm 121 equipped with the mirror 125 is lowered to the operating position and the optical system is switched on. If the roll has a large diameter, it interferes with the optical beam and the receiver does not emit a signal.
  • the signal emitted by the microswitch 129 enables the lifting and lowering device 33 to start lifting the roll.
  • the receiver will not emit a signal until the tubular core T reaches the height of the transmitter-receiver system, shown schematically with E-R in Figure 12.
  • the receiver starts to see the luminous signal and will continue to see it until the position in Figure 12C is reached.
  • Vertical travel of the roll between the instant in Figure 12B and the instant in Figure 12C is approximately the same as the diameter of the tubular core.
  • the lifting and lowering device 33 is stopped and its movement reversed. In fact, it will be made to descend by a height equal to half the diameter of the tubular core, measured by means of an encoder associated with the lifting arms of the device and by means of the signal of the transmitter-receiver system E-R. The roll is therefore positioned at the correct height to be picked up by the centers.
  • any significant misalignment of the axis is detected by the lack of signal. However, a situation of misalignment of this type should not occur.
  • the contact members of the arms of the lifting device 33 (composed of the idle wheels 73 or of the idle rollers 75) ensure that any incorrectly positioned roll is moved with its axis parallel to the axes of oscillation of the arms 51, 53.
  • the misaligned roll causes the wheels or rollers to rotate during lifting of the arms 51, 53 until it has reached the position parallel with the axes of oscillation of the aforesaid arms.
  • the operating cycle is still the same as the one described, with the exception that when lifting starts the receiver will pick up a signal of the optical beam, followed by an interval in which the detected signal is absent, corresponding to the period in which the roll, partially lifted, passes in front of the transmitter. This is followed by the sequence of signals described above.
  • the optical reading system can be replaced by another system, such as an ultrasonic system, when it is hypothesized that the tubular cores T may not be completely empty, for example due to the accidental presence of debris or residues of web materials.
  • a safety system which causes lifting of the arms of the devices 31, 33 to stop when the arms 51, 53 have reached a maximum safety height, can be used to block the lifting movement when the optical or equivalent system is not triggered due to incorrect positioning of the axis of the roll, or for other accidental causes (for example, in the case an optical system is used, if the tubular core T of the roll is not empty).
  • a system which provides a sensor means (for example, a capacitive sensor or microswitch) on the carriages or slides 19A, 19B, or carried by the crosspiece 7.
  • a sensor means for example, a capacitive sensor or microswitch
  • the structure of the unwinding device can have a different number of stations, or can have a single loading station in the center and two unloading stations at the sides, with a consequently modified operating cycle.

Landscapes

  • Replacement Of Web Rolls (AREA)
EP04425770A 2004-10-12 2004-10-12 Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines Withdrawn EP1647508A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425770A EP1647508A1 (fr) 2004-10-12 2004-10-12 Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425770A EP1647508A1 (fr) 2004-10-12 2004-10-12 Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines

Publications (1)

Publication Number Publication Date
EP1647508A1 true EP1647508A1 (fr) 2006-04-19

Family

ID=34932822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425770A Withdrawn EP1647508A1 (fr) 2004-10-12 2004-10-12 Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines

Country Status (1)

Country Link
EP (1) EP1647508A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1787931A1 (fr) * 2005-11-18 2007-05-23 Percivalle Special Converting S.A.S. Di Percivalle Barbara E C. Dispositif pour le remplacement de rouleaux dans une unité d'enroulement ou de déroulement
WO2012076273A1 (fr) 2010-12-10 2012-06-14 Sms Siemag Ag Dispositif et procédé de manipulation d'une bande métallique
US8555476B2 (en) 2010-03-12 2013-10-15 Sms Siemag Aktiengesellschaft Method and device for depositing a metal coil
CN113911789A (zh) * 2021-11-24 2022-01-11 贵州慧联科技有限公司 一种具有缓存机构的自动换膜装置
WO2022043024A1 (fr) 2020-08-31 2022-03-03 Fosber S.P.A. Installation et procédé de production d'un carton ondulé

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932003A (en) * 1961-03-13 1963-07-24 Warren S D Co Improvements relating to paper cutting and sorting machines
US3806058A (en) * 1971-07-23 1974-04-23 Ungerer Irma Apparatus for positioning a sheet metal coil in a coilholder
US4131206A (en) * 1977-03-04 1978-12-26 Kabushiki Kaisha Tokyo Seisakusho Automatic apparatus for furnishing web in rotary press
DE3402582A1 (de) * 1984-01-26 1985-08-08 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Fahrbare, insbesondere schienengebundene, hubeinrichtung zum zu- und einbringen von papierrollen in eine abwickelvorrichtung einer rollen-rotationsdruckmaschine
JPS63252858A (ja) * 1987-04-09 1988-10-19 Isowa Ind Co コルゲ−トマシンの原紙供給装置
US4854806A (en) * 1986-03-18 1989-08-08 Maschinenfabrik Wifag Device for loading or unloading paper rolls onto or from a roll stand of a web-fed rotary printing press
EP0349705A2 (fr) * 1988-07-04 1990-01-10 Sulzer Papertec Krefeld GmbH Dispositif de déroulage de bobines, spécialement pour une machine d'impression, et méthode pour introduire les tenons de serrage dans le noyau d'une bobine
US4919353A (en) * 1987-09-03 1990-04-24 Isowa Industry Co., Ltd. Cardboard web feeding device for corrugator
US5697575A (en) * 1995-04-28 1997-12-16 Enkel Corp Vertical splicer
US6042047A (en) * 1997-04-03 2000-03-28 Jagenberg Papiertechnik Gmbh Unwinder device for reels
EP1348658A1 (fr) * 2002-03-29 2003-10-01 FOSBER S.p.A. Dispositif de déroulement de bande pour des rouleaux de bandes

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932003A (en) * 1961-03-13 1963-07-24 Warren S D Co Improvements relating to paper cutting and sorting machines
US3806058A (en) * 1971-07-23 1974-04-23 Ungerer Irma Apparatus for positioning a sheet metal coil in a coilholder
US4131206A (en) * 1977-03-04 1978-12-26 Kabushiki Kaisha Tokyo Seisakusho Automatic apparatus for furnishing web in rotary press
DE3402582A1 (de) * 1984-01-26 1985-08-08 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Fahrbare, insbesondere schienengebundene, hubeinrichtung zum zu- und einbringen von papierrollen in eine abwickelvorrichtung einer rollen-rotationsdruckmaschine
US4854806A (en) * 1986-03-18 1989-08-08 Maschinenfabrik Wifag Device for loading or unloading paper rolls onto or from a roll stand of a web-fed rotary printing press
JPS63252858A (ja) * 1987-04-09 1988-10-19 Isowa Ind Co コルゲ−トマシンの原紙供給装置
US4919353A (en) * 1987-09-03 1990-04-24 Isowa Industry Co., Ltd. Cardboard web feeding device for corrugator
EP0349705A2 (fr) * 1988-07-04 1990-01-10 Sulzer Papertec Krefeld GmbH Dispositif de déroulage de bobines, spécialement pour une machine d'impression, et méthode pour introduire les tenons de serrage dans le noyau d'une bobine
US5697575A (en) * 1995-04-28 1997-12-16 Enkel Corp Vertical splicer
US6042047A (en) * 1997-04-03 2000-03-28 Jagenberg Papiertechnik Gmbh Unwinder device for reels
EP1348658A1 (fr) * 2002-03-29 2003-10-01 FOSBER S.p.A. Dispositif de déroulement de bande pour des rouleaux de bandes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 045 (M - 792) 2 February 1989 (1989-02-02) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1787931A1 (fr) * 2005-11-18 2007-05-23 Percivalle Special Converting S.A.S. Di Percivalle Barbara E C. Dispositif pour le remplacement de rouleaux dans une unité d'enroulement ou de déroulement
US8555476B2 (en) 2010-03-12 2013-10-15 Sms Siemag Aktiengesellschaft Method and device for depositing a metal coil
US9346090B2 (en) 2010-03-12 2016-05-24 Sms Group Gmbh Method and device for depositing a metal coil
WO2012076273A1 (fr) 2010-12-10 2012-06-14 Sms Siemag Ag Dispositif et procédé de manipulation d'une bande métallique
DE102011080410A1 (de) 2010-12-10 2012-06-14 Sms Siemag Ag Vorrichtung und Verfahren zum Handhaben eines Metallbandes
RU2561945C2 (ru) * 2010-12-10 2015-09-10 Смс Зимаг Аг Устройство и способ манипулирования металлической полосой
US9289809B2 (en) 2010-12-10 2016-03-22 Sms Group Gmbh Device and method for handling a metal strip
WO2022043024A1 (fr) 2020-08-31 2022-03-03 Fosber S.P.A. Installation et procédé de production d'un carton ondulé
CN113911789A (zh) * 2021-11-24 2022-01-11 贵州慧联科技有限公司 一种具有缓存机构的自动换膜装置
CN113911789B (zh) * 2021-11-24 2024-04-30 贵州慧联科技有限公司 一种具有缓存机构的自动换膜装置

Similar Documents

Publication Publication Date Title
EP2782857B1 (fr) Dérouleur de rouleau et procédé de déroulage
GB2217690A (en) Web feeding device
US10399808B2 (en) Line for the production of spools of web material
CN112707209B (zh) 一种无溶剂复合铝箔高位放卷系统及其工作方法
JPH06115773A (ja) 材料ウエブのリールの取扱い装置
US6264417B1 (en) Flexible roll chucking assemblage and method
EP1647508A1 (fr) Procédé et dispositif de déroulement de bobines de matière en bande et dispositif de levage des bobines
CN111907844A (zh) 基于水刺非织造行业的自动包装集成系统和包装方法
US20060157610A1 (en) Apparatus and method for the automated and simultaneous preparation and changing of at least two rolls of paper webs or the like for a downstream garniture cutter
US11254534B2 (en) Unwinder for reels and unwinding method
EP1348658B1 (fr) Dispositif de déroulement de bande pour des rouleaux de bandes
US5192033A (en) Apparatus for moving rolls from a loading station to an unwinding station and for moving empty roll cores from the unwinding station to the loading station
EP3464142B1 (fr) Dérouleur de bobines avec système de chargement et de déchargement des bobines
JP2000327188A (ja) ターレツト用原反受渡設備
JP5126593B2 (ja) ロール状物品用の収納設備
JP2918711B2 (ja) 搬送途中における円柱状体の位置合せ方法及び装置
JP3553367B2 (ja) アンワインダ装置
CN116529187A (zh) 用于卷绕有包装材料的储备卷的运输装置
JP2712108B2 (ja) 給紙装置へのロール原反供給方法及び装置
CN220641890U (zh) 包装材料提取装载装置
KR100253126B1 (ko) 권취시트 형상물의 잔심회수장치
KR100276956B1 (ko) 권취물의 운반 및 저장장치
JPH02282144A (ja) 巻取装置の巻取ロール排出方法及び装置
JP2663168B2 (ja) 巻取装置の巻取ロール排出方法及び装置
JPH0416395B2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20061020