EP2112106A1 - Method and device for cutting and gluing end-to-end for an unrolling machine - Google Patents

Abstract

The method involves preparing an end of a new band of a new bobbin (6), and fitting a gluing joint on a connection assembly (4). Another gluing joint to be transferred is mounted on the connection assembly corresponding to a bobbin (8) unrolling a completed band. The bobbin (8) is stopped, and a junction is formed by gluing the new band with a section of the completed band using connections of the connection assembly. The unrolling of the new bobbin is started. An independent claim is also included for an end-to-end cutting and gluing device for an unrolling machine.

Description

The present invention relates to the field of machines for unrolling web materials, from reels, to supply, in particular continuously, including printing machines, cutters, folder-gluers, or other shaping machines. and relates to a method and a device for cutting and butt-gluing a unwinding machine having two reel members.

In known unrolling machines, the connection of the finishing web of a reel with the beginning of the next reel tape is generally performed during a temporary stop, the finishing web passing in a reserve of tape arranged between the exit of the unwinding machine and the downstream processing machine.

We also know, by FR-A-2,618,769 , a unwinding machine consisting essentially of two reel towers capped at their upper part by a bridge structure for receiving a tape accumulator and by two stopband connection boxes, each assigned to a tower gate -bobines and movable mounted in translation transversely to the strip under the bridge structure.

The connecting boxes are mounted in opposition, each under the bridge structure, movably transverse to the latter, by means of horizontal rails integral with said structure and projecting forwardly relative thereto, and are fixed in translation each with the corresponding tower, in order to be able to follow all the movements of the corresponding tower.

On the face facing the opposite box, each box has a plate provided, on the one hand, with a transverse slot inclined relative to the horizontal, in which is mounted, movable by means of a jack or a linear motor, a cutting device, and, secondly, several rows of air suction holes, or clamps, these holes or clamps being arranged, on the one hand, on both sides of the slot and, on the other hand, parallel to the lower edge of the plate, which is further mounted along one of its horizontal edges, preferably along its lower edge, pivotally on the box, pivot axis of the plate simultaneously forming the support of return rollers of the strip to unroll.

The boxes have a width greater than the largest possible width of the strips to unroll and their plate are, on the one hand, symmetrical with respect to a vertical plane passing between the boxes and, on the other hand, each loaded on its inner face by a device for pivoting about the axis.

Simultaneous actuation of the displacement device of each plate has the effect of causing said plates to pivot about their axis, and of making an intimate application of the central planes enclosing the transverse slots of said plates with the interposition of the finishing and new bands, as well as of their adhesive butt joint.

This unrolling machine makes it possible to cut and connect precisely between the finishing and new belts with great accuracy with a short interruption of the unwinding device, requiring downstream accumulation.

However, known unrolling machines do not fully meet the new production requirements that impose higher speeds with a guarantee of perfect connection.

The present invention provides a method and a device for cutting and butt-gluing for a unrolling machine having two reel elements, to ensure a reduction in connection time while ensuring a perfect connection.

For this purpose, the method of cutting and butt-gluing machine unwinding, comprising two reel members capped at their upper part by a bridge structure that can receive a tape accumulator and two sets of connection strips to stopping, each assigned to a reel-carrying element object of the invention, is characterized in that it essentially consists in preparing masked time the end of the new strip of a new reel and providing it with a bonding joint, on a corresponding connection assembly, to possibly subsequently mount, in masked time, on the connection assembly corresponding to the coil unwinding the finishing strip, a second bonding joint to be transferred, then to realize the stopping the coil unwinding the finishing strip and making the joining by gluing of the new strip followed by the cutting of the finishing strip, by bringing together the coupling assemblies the course of the new coil is then started.

The subject of the invention is also a device for cutting and butt-gluing a machine for unrolling the method, this machine essentially consisting of two reel-carrying elements capped at their upper part by a structure made of bridge capable of receiving a strip accumulator and two stationary strip connection assemblies, each assigned to a coil carrier member and arranged symmetrically with respect to the strip unwinding axis, characterized in that each set of connection comprises a station for preparing and transferring a seal, a device for holding and cutting the new band or the finishing band and possibly means for moving in and out of the band connection sets.

• la figure 1 est une vue en élévation latérale d'une machine à dérouler pourvue d'un dispositif de mise en oeuvre du procédé conforme à l'invention, selon un premier mode de réalisation ;
• la figure 2 est une vue analogue à celle de la figure 1 d'une variante de réalisation du dispositif selon l'invention ;
• les figures 3 à 5 sont des vues partielles en élévation latérale et en coupe, à plus grande échelle, représentant les ensembles de raccordement en positions de préparation et de transfert du joint du côté de la bande finissante ;
• la figure 6 est une vue analogue à celle de la figure 3, représentant le début de l'opération de préparation et de transfert du joint du côté de la nouvelle bande ;
• la figure 7 est une vue analogue à celle de la figure 6 représentant l'enfilage du début de la nouvelle bande ;
• la figure 8 est une vue analogue à celle de la figure 7 représentant l'ensemble de raccordement de la nouvelle bande, après préparation de l'extrémité et avant pose du joint de raccordement ;
• la figure 9 est une vue analogue à celles des figures 6 à 8 montrant l'ensemble de raccordement de la nouvelle bande en position d'attente avant raccordement, et
• la figure 10 montre le dispositif en position de raccordement des bandes finissante et nouvelle.

The invention will be better understood, thanks to the following description, which refers to preferred embodiments, given by way of non-limiting examples, and explained with reference to the appended diagrammatic drawings, in which:

• the figure 1 is a side elevational view of a unwinding machine provided with a device for implementing the method according to the invention, according to a first embodiment;
• the figure 2 is a view similar to that of the figure 1 an alternative embodiment of the device according to the invention;
• the Figures 3 to 5 are partial views in side elevation and in section, on a larger scale, showing the connection assemblies in preparation and transfer positions of the seal on the side of the finishing strip;
• the figure 6 is a view similar to that of the figure 3 , representing the beginning of the operation of preparation and transfer of the seal on the side of the new band;
• the figure 7 is a view similar to that of the figure 6 representing the threading of the beginning of the new band;
• the figure 8 is a view similar to that of the figure 7 representing the connection assembly of the new strip, after preparation of the end and before laying the connection joint;
• the figure 9 is a view similar to those of Figures 6 to 8 showing the connection assembly of the new band in waiting position before connection, and
• the figure 10 shows the device in the connecting position of the finishing and new tapes.

The figure 1 By way of example, the accompanying drawings show a machine for unrolling, which comprises two reel-carrying elements 1 capped at their upper part by a bridge structure 2 for receiving a strip accumulator 3 and by two sets 4 of connecting strips at a standstill, each assigned to a reel-carrying element 1. In this embodiment, the two reel-carrying elements 1 are in the form of reel spindles and the accumulator 3 is integral with the bridge 2. However, the tape accumulator 3 can also be arranged on one side or the other of the machine, for example for reasons of space requirement.

The figure 2 The accompanying drawings show an alternative embodiment of the unwinding machine in which the two reel members 1 are in the form of pivoting arm supports.

According to the invention, the machines according to figure 1 or according to the figure 2 implement an end-to-end cutting and gluing process which essentially consists in preparing masked time the end of the new strip 5 of a new coil 6 and providing it with a glue joint 7, on a set corresponding connection 4, possibly to be mounted later, in masked time, on the connection assembly 4 corresponding to the coil 8 unwinding the finishing strip 9, a second bonding joint 10 to be transferred, then to carry out the stop of the coil 8 unwinding the finishing strip 9 and to make the joining by gluing of the new strip 5 followed by the cutting of the finishing strip 9, by bringing together the connection assemblies 4, the unwinding of the new coil 6 is then started. With this method, it is possible to make the choice between the strips with a single joint, on one side of the ends of the strips to be connected, or with two seals, each on one side of the ends of said strips to be connected.

For this purpose, each connection assembly 4 of the butt cutting and gluing device for a machine to unwind, according to the figures 1 and 2 , implementing this method, comprises a station 11 for preparing and transferring a seal 7 or 10, a device 12 for holding and cutting the new band 5 or the finishing band 9 and possibly a means 13 for moving approaching and spacing bands 4 connection strips.

Each station 11 for preparing and transferring a seal 7 or 10 is constituted by a cylinder 14 for receiving, holding and applying a seal 7 or 10, mounted on a pivoting frame 15 actuated by at least one jack 16. The pivoting frame 15 is preferably in the form of two lateral arms 19 joined to each other by crosspieces 19 ', as well as by a pivoting axis 20 of said frame 15, this shaft 20 supporting a return cylinder 21 for the new band 5 or the finishing band 9. The cylinder 14 is advantageously a vacuum hollow cylinder, provided on a portion of its surface with perforations extending in a strip parallel to a generator. Thus, an operator can set up the seal 7 for the end of the band of the new coil 6 by acting on the connection assembly 4, in its rest position, shown on the right in the figures 1 and 2 .

In the case of implementation of the device according to the invention in a machine according to the figure 2 , comprising bobbin-carrying elements 1 in the form of pivoting arm supports, the stationary strip connection assemblies 4 are advantageously arranged stationary on a central frame and the actuator cylinder (s) 16 for the pivoting frame 15 then form the means 13 for moving in and out of said strips connecting assemblies 4. In this case, there is provided, on either side of the receiving frame of the band connection assemblies 4, a service bridge, extending between said frame and the pivoting arm supports and from which an operator will have access.

It is also possible, according to another embodiment of the invention, not shown in the accompanying drawings, in the case of implementation of a machine comprising reel members 1 in the form of pivoting arm supports, to mount said said reel members 1 each on a movable frame further carrying a set of 4 connecting strips at a standstill, said movable frames being movable towards and away by means of a drive device. This last device can be geared motor type or other.

In the case of implementation of the device according to the invention in a machine according to the figure 1 , the two reel members 1 are in the form of reel spools and the strip connection assembly 4 assigned to each reel spool is mounted under the bridge structure 2 in a movable manner towards and away from each other. spacing the other set of 4 band connection through the means 13 moving inwardly and spaced apart. This means 13 can be implemented in the form of a gearmotor or other motorized device acting on an inverted drive means connected to each set 4 of strip connection or in the form of two independent actuators each assigned to a set 4. A reverse drive displacement means, which is not shown in detail in the accompanying drawings, may be constituted, for example, by a chain or a drive belt actuated by a geared motor or other motorized device and connected by its opposite strands, respectively to one or the other set 4 of strip connection. In such an embodiment, the evolution area of the operator is centered between the two band connection assemblies 4, which are moved towards each other to make the connection and which are separated to allow perform the preparation operations.

According to a characteristic of the invention, when implementing a machine comprising reel spools, each station 11 for preparing and transferring a gasket 7 or 10 is provided, in addition, with a table 17 slidably mounted parallel to the assembly 4 for connecting strips, on a guide support 17 'thereof, and comprising a vacuum box 171. This table 17 can be moved on the guide support 17' by a simple action manual, its stop in the extreme positions being provided by end stops (not shown) cooperating with a snap-fastening device or the like. This movement of the table 17 can also be provided by means of a jack.

The table 17 is mounted, via its guiding support 17 ', on the assembly 4 connecting strips with the possibility of vertical displacement under the action of a cylinder 18. Thus, after installation of the seal 7 or 10 on the casing 171 and replacement of the table 17 in the assembly 4 strip connection, said table 17 can be positioned opposite the perforations of the cylinder 14. The latter can then be moved to the table 17 for s apply against the seal 7 or 10. Then, the suction is cut in the casing 171 and established simultaneously in the cylinder 14, and the table 17 is moved vertically, driving the cylinder 14 in rotation and transferring the seal 7 or 10 on the corresponding longitudinal section of said cylinder 14.

It is also possible, according to an alternative embodiment of the invention, not shown in the accompanying drawings, to provide the front face of the table 17 in a flexible material mounted with the possibility of sliding on the box forming said table 17. It is then sufficient to simply apply the cylinder 14 forcibly against the front face of the table 17, which will then curve to deposit the seal 7 or 10 on said cylinder 14. Of course, as for the first embodiment, it will be necessary to cut the suction in the table 17 and plug into the cylinder 14 during this maneuver.

The device 12 for holding and cutting the new strip 5 or the finishing strip 9 is advantageously constituted by a counterpart 22 for applying the new strip 5 or the finishing strip 9 against a transverse support plate 23 and by a knife 25 of transverse section, parallel displacement or angled relative to the cylinder 14 for receiving, holding and applying a seal 7 or 10. This counterpart 22 has a bar-like shape, mounted between two side arms s extending on either side of the lateral arms 19 of the frame 15 and is pivotally actuated by at least one jack 24. Thus, during the preparation of the new band 5 or immediately before the cutting of the finishing band 9, the counterpart 22 is actuated by the jack or cylinders 24 so as to apply the corresponding portion of the band 5 or 9 against the transverse support plate 23, to promote the cutting of the new band 5 or the finishing band 9. As soon as this cut is made, the counterpart 22 is controlled in the direction of a spacing of the transverse support plate 23.

In the case of the implementation of relatively rigid strips to unroll, it may be necessary, for the preparation of the joint of the new strip 5, to remove the already prepared end of the new strip 5 of the item 11 of preparation and transfer of the corresponding gasket 7, in order to better access this position. According to the invention, it is provided for this purpose that each connection assembly 4 comprises, under the transverse support plate 23 and the knife 25 of cross section, spacer fingers 26 mounted at regular intervals on a receiving shaft 27 and pivotally actuated by means of at least one jack 28 secured by its yoke with the frame 15. In the rest position, these spreading fingers 26 are retracted under the guide support of the knife 25 of cross-section and, after the cut of the new band 5, the actuation of the jack or cylinders 28 pivots said spacer fingers 26 in the direction of a spacing of the end of the new band 5 of the station 11, as shown in FIG. figure 8 .

According to another characteristic of the invention, not shown in the accompanying drawings, each connection assembly 4 can be provided, in addition, with a complementary retaining means extending below the level of the spacer fingers 26, for example, in the form of a complementary suction device extending immediately under said spreader fingers 26. Thus, after cutting the end of the new band 5, the end of the latter can be pushed back, the rest of the band being maintained on said complementary retention means.

Moreover, each frame 15 is provided, near its return cylinder 21, with a low gripper 28 consisting of a fixed roller pivotally mounted on the frame 15 by means of arms 280 and actuated in pivoting by at least one jack 29. This low clamp 28 is intended to maintain the new band 5 during its preparation.

The masked preparation of the end of the new strip 5 of a new coil 6 consists in manually threading the new strip 5 by passing between the return cylinder 21 of the pivoting frame 15 and the lower clamp 28, then between the counterpart 22 of application of the new band 5 and the transverse support plate 23 of the device 12 for holding and cutting the new band 5, then closing the lower clamp 28 on the new band 5 by pivoting the fixed roller constituent against the return cylinder 21, then to close the counterpart 22 on the transverse support plate 23 of the device 12 for holding and cutting the new band 5 and to cut the end of the new band 5 to medium of the knife 25 cross section.

After cutting the end of the new band 5, the counterpart 22 is pivoted in the direction of its opening, so as to release the cut end, and the spreader fingers 26 are actuated in such a manner that they separate said end of the device 12 for holding and cutting.

The gluing joint 7 and optionally the gluing joint 10 are mounted in masked time on the corresponding cylinder 14 for receiving, holding and applying a seal 7 and / or 10 by prior application on the table 17, moved outwardly projecting from the connection assembly 4, this table 17 then being returned to position in said connecting assembly 4 to be moved in front of the cylinder 14 for receiving, holding and applying a seal 7 and / or 10 which is then pivoted towards the table 17 and the latter is moved vertically by rotating the cylinder 14, the depression being simultaneously cut in the table 17 and connected in the cylinder 14. It follows an application of the seal 7 and / or seal 10 on the cylinder 14 corresponding.

In the case of an implementation of a rolling machine of the type shown in FIG. figure 2 , that is to say comprising reel-carrying elements 1 in the form of pivoting arm supports, the threading of the new band 5 takes place in the same manner as that described with regard to a machine comprising the reel-holder towers. However, the establishment of the seal 7 and / or 10 on the cylinder 14 for receiving, holding and applying said seal 7 and / or 10 can be performed directly, by tilting of this cylinder towards the operator who is positioned between the connection assembly 4 and the corresponding reel member 1.

In the case of implementation of two seals 7 and 10, after preparatory work to prepare the end of the new strip 5, as well as seals 7 and 10, the lower part of the seal 7 is transferred to the end. of the new band 5 ( figure 9 ) and the seal 10 intended to be applied on the end of the finishing strip 9 is brought into its position of application by rotation of the cylinder 14 carrying it in this position ( figures 8 and 9 ).

The connection assembly 4 assigned to the new coil 6 is then brought into its connection position and when the connection is to be made, the connection assembly 4 of the finishing strip 9 is also brought into the connection position shown in FIG. figure 10 attached drawings.

For this purpose, the approximation of the connection assemblies 4 can be realized, as indicated above, either by moving these sets of a preparation position, as represented in FIG. figure 1 to the connection position by means of the device 13, when the reel members 1 are in the form of reel spools. In the case of a realization following the figure 2 , the reel members 1 remain fixed and the two connection assemblies 4 are advantageously arranged stationary on a central frame. The approximation of the connecting elements 4 for the connection between the finishing strip and the new band then simply consists of a pivoting of the frame 15 of each set 4 about its pivot axis 20. In both cases, the stop of the finishing band 9 is only achieved when the connecting elements 4 apply the joints 7 and 10 on the finishing strips 9 and new 5, for cutting the finishing strip 9 and connecting the latter to the beginning of the new strip 5 via the seals 7 and 10.

The triggering of the connection simultaneously controls, in known manner, a stop unwinding the coil 8 unwinding the finishing strip 9, with simultaneous application, on the one hand, of the upper part of the seal 10 on the end of the finishing strip 9 and, on the other hand, the upper part of the seal 7 on the end of the finishing strip, followed by its section. Immediately after the cutting of the finishing strip 9, the nip of the new strip 5 is interrupted and the assembly-finishing band 9 joints 7 and 10 - new band 5 progresses slowly between the cylinders 14 of the two connection sets 4, so that the application of the lower part of the seal 10 on the end of the new strip 5 is performed, then the new unwinding reel 6 is launched to unwind the new strip 5 at the normal speed of unwinding.

To allow a gradual restart of the connected strips, the cylinders 14 for receiving, holding and applying a seal 7 or 10 are advantageously provided with a motor (not shown) which may consist, for each cylinder 14, in a set gearmotor.

The invention has been described with respect to an end-to-end connection using two seals. However, it is also possible to make such a connection with a single seal 7 advantageously provided on the new strip 5. In such a case of implementation the seal 7 is deposited in the manner described above about a connection with two opposed seals and the bonding of the end of the finishing strip 9 is performed on the seal 7 in the same manner as described above, after cutting.

Thanks to the invention, it is possible to perform an end-to-end connection of strips at a standstill, this ensuring a perfect bonding of the ends of the strips on the connection joint (s), since the bonding is carried out before the cutting of the finishing band.

In addition, the connection time can be considerably reduced, so that the overall efficiency of the installation is improved.

Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (19)

A method of cutting and sticking end to end for unwinding machine, comprising two reel elements (1) capped at their upper part by a bridge structure (2) which can receive a battery (3) strips and two sets ( 4) for connection of stationary bands, each assigned to a reel element (1), characterized in that it consists essentially of preparing in masked time the end of the new strip (5) of a new coil (6) and to provide a bonding joint (7) on a corresponding connection assembly (4), possibly to be mounted later, in masked time, on the connection assembly (4) corresponding to the coil (8) unwinding the finishing strip (9), a second gluing joint (10) to be transferred, then stopping the coil (8) unwinding the finishing strip (9) and making the joining by gluing of the new band (5) followed by the cutting of the finishing band (9), by close and connection assemblies (4), the unwinding of the new coil (6) being then started. Cutting device and butt gluing machine for unrolling, using the method according to claim 1, this machine having two reel elements (1) capped at their upper part by a bridge structure (2) can receive a accumulator (3) of strips and two sets (4) of connection of strips at rest, each assigned to a reel member (1), characterized in that each connection assembly (4) comprises a station (11) for preparing and transferring a seal (7 or 10), a device (12) for holding and cutting the new band (5) or the finishing band (9) and optionally means (13) for moving the approaching and spacing bands (4) connecting strips. Device according to claim 2, characterized in that each station (11) for preparing and transferring a seal (7 or 10) is constituted by a cylinder (14) for receiving, holding and applying a seal (7 or 10), mounted on a pivoting frame (15) actuated by at least one jack (16). Device according to claim 3, characterized in that the pivoting frame (15) is in the form of two lateral arms (19) connected together by crosspieces (19 '), as well as by an axis (20) of pivoting said frame (15), this axis (20) supporting a return cylinder (21) for the new band (5) or the finishing band (9). Device according to any one of claims 3 and 4, characterized in that the cylinder (14) is a vacuum hollow cylinder, provided on a portion of its surface with perforations extending in a strip parallel to a generator. Device according to Claim 2, characterized in that , in the case of implementation of reel-carrying elements (1) in the form of pivoting arm supports, the stationary web connection assemblies (4) are arranged in a fixed position on a central frame and the actuator (s) (16) of the pivoting chassis (15) form the means (13) for moving towards and away from said bands connecting assemblies (4). Device according to Claim 6, characterized in that a service bridge is provided on each side of the receiving frame of the belt connection units (4), extending between said chassis and swing arm supports. Device according to Claim 2, characterized in that, in the case of implementation of reel-carrying elements (1) in the form of pivoting arm supports, said reel-carrying elements (1) are each mounted on a chassis mobile carrying, in addition, a set (4) for connecting strips at a standstill, said mobile frames being displaceable towards and away by means of a motorization device. Device according to claim 2, characterized in that, in the case of implementation of coil-carrying elements (1) in the form of coil-reels, the set (4) of band connection assigned to each tower reel holder is mounted under the bridge structure (2), movably movable towards and away from the other band connection assembly (4) via the means (13) for moving inwards and apart , which is embodied as a gearmotor or other motorized device acting on an inverted drive means connected to each band connection assembly (4) or in the form of two independent actuators each assigned to an assembly (4) . Device according to claim 9, characterized in that an evolution area of the operator is centered between the two reel elements (1). Device according to any one of claims 2 to 5 and 9 and 10, characterized in that each station (11) for preparing and transferring a seal (7 or 10) is further provided with a table (17) slidably mounted parallel to the assembly (4) for connecting strips, on a guide support (17 ') of the latter, and comprising a vacuum box (171). Device according to Claim 11, characterized in that the table (17) is mounted via its guide support (17 ') on the belt connection assembly (4) with the possibility of vertical displacement under the action of a jack (18). Device according to claims 11 and 12, characterized in that the front face of the table (17) is made of a flexible material mounted with the possibility of sliding on the box forming said table (17). Device according to any one of claims 2 and 3, characterized in that the device (12) for holding and cutting the new band (5) or the finishing band (9) consists of a counterpart (22) applying the new band (5) or the finishing band (9) against a transverse support plate (23) and by a knife (25) of transverse section, with parallel or angled displacement relative to the cylinder ( 14) receiving, maintaining and applying a seal (7 or 10). Device according to claim 14, characterized in that the counterpart (22) is bar-shaped, mounted between two lateral arms extending on either side of the lateral arms (19) of the frame (15) and is actuated pivoting by at least one jack (24). Device according to any one of claims 2 to 15, characterized in that each connection assembly (4) comprises, under the transverse support plate (23) and the knife (25) of transverse section, spreading fingers ( 26) mounted at regular intervals on a receiving shaft (27) and actuated by pivoting through at least one jack (28) secured by its yoke with the frame (15). Device according to one of Claims 2 to 16, characterized in that each connection unit (4) is provided with in addition, a complementary retaining means extending below the level of the spacer fingers (26), for example, in the form of a complementary suction device extending immediately under said spreader fingers (26). Device according to any one of claims 2 to 17, characterized in that each frame (15) is provided, near its return cylinder (21) with a low clamp (28) consisting of a fixed roller pivotally mounted on the frame (15) by means of arms (280) and pivotally actuated by at least one jack (29). Device according to any one of claims 3, 5 and 14, characterized in that the cylinders (14) for receiving, holding and applying a seal (7 or 10) are provided with a motorization which may consist of for each cylinder (14), a geared motor assembly.

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