FR2796930A1 - DEVICE FOR ADJUSTING THE PHASE OF PUNCHING DEVICES ACCORDING TO THE FOLDING MODE - Google Patents

Abstract

In this device for piercing strips of material using perforating tools (35. 1, 36. 1, 37. 1, 38. 1) arranged on cylinders, in which the position of the perforations is adjustable during the operating cycle and the punching tools cooperate with punching bars (35. 2, 36. 2, 37. 2, 38. 2) to form transverse perforations, the punching tools and punching bars are arranged on a or several perforation brackets (27, 27. 1, 28, 28. 1) coaxial with the cylinders, one of the cylinders (4) being movable relative to the other cylinder (3). Application in particular to folding machines associated with a rotary printing machine.

Description

i The invention relates to a device for phase adjustment, depending

  of the folding mode, of perforation devices which are mounted for example in a folder installed downstream of a rotary printing machine. According to the state of the art, namely Japanese patent application Hei-6-211424, a perforation device is known for perforation tools located in the folder of a rotary press. Using the solution proposed here, it must be possible to correct the difference in position between transverse perforations located on the inner side and on the outer side of folded copies by the fact that the position of a transverse perforation formed externally on the copy is offset from a perforation made on the inside of the folded copy. For this purpose, there is provided, in a folding machine, a folding cylinder arranged with a diameter three times larger, the rotation of which is transmitted to a cylinder produced with a single diameter, a unit for changing the angle of rotation being provided between said cylinders. This unit comprises a first pair of traction cylinders, a receiving cylinder having a single diameter, another pair of traction cylinders and a double pinion, produced with a diameter twice as large. After the perforation operation on one side of the folded copy, the other side of the folded copy is applied with an offset from the transverse perforation formed first, using a gear planetary associated with the perforation cylinder having the simple diameter. In this configuration, there is no possibility of adjusting the perforation depth transversely to the direction of movement of the strip of

  cylinders carrying the perforation tools.

  According to the German document DE 43 27 466 A 1, a device is known for making transverse perforations. This device is designed for a folder,

  which is equipped with two transverse folding devices.

  Perforation knives and perforation bars, which cooperate in pairs respectively, are provided on the perforation cylinders. An adjustment movement of the device during the operating cycle is carried out by means of a perforation cylinder formed of two elements as well as by means of a perforation cylinder formed of a single element. It is possible to carry out respectively an adjustment movement, and this correct in position relative to the transverse folds, of all the perforation knives or of all the perforation knives and of the perforation bars associated with the first transverse fold, and finally a displacement for adjusting all punch knives and all punch bars. For the adjustment movement of the transverse perforations, on the side walls of the folder carrying the perforation device, pinions with straight teeth and oblique teeth are arranged so as to be movable with respect to each other, and this in up to four plans of gear trains. This embodiment occupies on the one hand a huge mounting space and on the other hand it is necessary to provide a large number of mechanical parts, not only pinions, but also shafts, systems of turning of shafts and connections to parallel key as well as couplings, which make the expense of the fitting point of view

is very high.

  In view of the state of the art, the invention aims to provide a device, the arrangement of which remains simple and which serves to adapt the transverse perforation position to the transverse folding position during the operating cycle in a folder, which can operate in different folding modes. The problem is solved in accordance with the invention using the device of the type indicated above by the fact that the perforation tools are arranged, around the perforation bars, on one or more perforation stirrups which are coaxial with the cylinders of perforation, one of the perforation cylinders being

  movable relative to the other perforation cylinder.

  The advantages which can be obtained with the solution according to the invention are of multiple natures. On the one hand, thanks to the twisting of the perforation stirrups on the perforation cylinders, it is possible to obtain a great simplification of the adjustment device by displacement for the modification of the phase position of perforation stirrups during the operating cycle with respect to to the perforation cylinder, and on the other hand the training of the perforation stirrups is greatly simplified. In addition, using the solution proposed according to the invention, it is possible to simplify the adjustment of the perforation depth, that is to say the degree of penetration of the perforations,

  especially for strips of multilayer material.

  In an advantageous alternative embodiment of the idea underlying the invention, the perforation stirrups are arranged on the axes which respectively pass through the perforation cylinders. One of the perforation stirrups can be moved in the opposite direction to the direction of rotation of the perforation cylinder, so as to take account, at the level of the example, of the different transverse folding positions, which are established during

  switching of the transverse folding mode.

  A perforation tool can be fixedly mounted on the periphery of a perforation cylinder and cooperate with a perforation strip also fixedly mounted on the opposite cylinder. In addition, on a first perforating stirrup provided on the perforating cylinder, it is possible to mount a perforating tool which can rotate in the circumferential direction in the direction of the perforating cylinder. This cylinder cooperates with a perforation bar which is fixedly mounted on the opposite cylinder, for example for obtaining a transverse perforation in the folding mode with two transverse folds. Said perforation stirrup can also receive another perforation tool, which is intended to perform the perforation in the delta folding mode and applies perforations to the back of the delta fold, formed in the copy. In the perforation cylinder mounted so as to be adjustable by displacement relative to the perforation slot unlike a perforation cylinder fixedly mounted, it is possible to install another perforation stirrup which cooperates with a perforation strip which is provided on the cylinder fixed mounted perforation,

indicated first.

  The perforation bars fixed as standard on the perforation cylinders for delta folding and a second transverse folding (double parallel folding) can be installed on other perforation stirrups, which are mounted coaxially to the axes of the cylinders of perforation. To reduce the drive power of the adjusting drive necessary for the relative movement of the perforation stirrups, the perforation stirrups, which envelop the perforation cylinders in the same way as shells, can be mounted in

  journals on the axes of the cylinders.

  In an embodiment which avoids before-

  The use of complete front sprocket gear trains is advantageous; the perforation stirrups can be adjusted by means of transmission elements which are mounted in the form of slide guides on the trunnions, provided on the drive side. , axes of the perforation cylinders. As elements transmitting the adjustment stroke, it has proven to be very suitable and advantageous from a manufacturing technical point of view to provide, on the external faces of the slide guides, external toothing, with which corresponding teeth located on the stirrups cooperate. perforation, in order to obtain a relative positioning of the perforation stirrups, which house the perforation tools, relative to the envelope of the perforation cylinders. Since one of the perforation cylinders is adjustable by displacement relative to the perforation slot so as to modify the perforation depth in the material strips, between the perforation stirrups which can be actuated by a common adjustment unit is arranged a mechanical compensation system which allows the joint modification of the circumferential positions of the perforation stirrups on the cylinders, without the geometry of the perforation slot being affected by the position of the

movable perforation.

  The device according to the invention is suitable for use both in folding machines with sets of sizes and in folding machines without sizes, as well for printing city works

than for newspaper printing.

  Other features and advantages of the

  present invention will emerge from the description given

  hereinafter taken with reference to the accompanying drawings, in which: - Figure 1 shows the schematic arrangement and sequence of transverse folding process in a folder, which is arranged downstream of a rotary press; - Figure 2 shows the pair of perforation cylinders, which cooperate with each other at a perforation slot and comprise perforation stirrups mounted coaxially with the cylinders; - Figure 3 shows the kinematics of a device for driving perforation stirrups with respect to perforation cylinders, the latter comprising a single perforation stirrup on their periphery; and FIG. 4 represents the kinematics of the device for driving two perforation stirrups, which are respectively arranged on the periphery of the

perforation cylinders.

  The representation in Figure 1 shows the schematic arrangement and execution of the

  transverse folding in a folder.

  A strip of printed material 1, which consists of several layers, penetrates, in the direction 2 of movement of the strip in a folder, being oriented vertically, the strip being perforated between the perforating cylinders 3, 4, which cooperate between them, so that the perforations in the transverse direction of the strip of material 1 coincide with the positions of the transverse fold. The perforation tool 5 located on the fixedly mounted perforation cylinder 3 and the perforation tool 6 mounted on the adjustable perforation cylinder 4 are used to perforate the back of the pleats for the first and second transverse pleats (pleats double parallel), while the perforation tool 7, which is additionally provided on the fixed mounted perforation cylinder 3, is provided for delta folding. In the transverse perforating devices known hitherto, switching of the perforating tools was only possible after stopping the press

  rotary and subsequent displacement.

  Once the perforation has been carried out, copies 12 are separated from the end of the strip of material 1, which is situated forward in the direction 2 of movement of the strip, copies which can also be formed by several individual layers superposed, in depending on the number of ribbons installed in the strip of material 1. The copies 12 are gripped by the folding cylinder 9, are transported on the circumferential surface 11 of the latter and are introduced, by activation of the folding knife 10, which emerges on the periphery 11 of the folding cylinder 9, in the folding blades of a folding blade cylinder not shown here in detail and which cooperates with the folding cylinder 9. Consequently the back 15 of the fold appears between the ends 13 and 14 of copy 12, which leads to the formation of the first transverse fold or the first parallel fold. A reception of the copy 12 is carried out by means of a junction, not shown here in detail, of the folded copies 12 with another folding cylinder 16, the junction of the copies not being the subject of the present invention, and this at the circumferential surface 18 of the copy, and the formation, which then occurs, of the second transverse fold by removing the folding knife 17 and folding of the copy 12 already folded transversely once. A copy 22 is obtained which is double folded transversely and provided with ends 24 and 25, the folding back 23 being formed at the level of the second transverse fold (double parallel fold). In the delta folding mode, the item is folded twice, but in different locations, while in the case of the double parallel folding mode, depending on a set false fold, it takes up half folding of copy 12, which is carried out during the first and second transverse folds, which leads to

obtaining a copy 22.

  Once the transverse folding has been carried out, whether in the delta folding mode or in the double parallel folding mode, the copies 12, 22 folded in this way are transported via a transport cylinder 20 to a second longitudinal folding device, which is optionally provided, or else

directly are issued.

  FIG. 2 represents the side elevation view of a pair of perforation cylinders 3, 4, and there is provided, between the circumferential surfaces 33 and 34 of the folding cylinders 3, 4, a perforation slot 26 for the strip of material 1 which passes between the cylinders of the pair of perforation cylinders 3, 4. Depending on the thickness of the strip of material to be treated 1, the perforation cylinder 4 can be brought closer to the periphery of the fixed mounted perforation cylinder 3 or can be dismissed. As a result, the penetration depth of the perforations to be produced in the layers making up the strip can be adjusted and possibly modified.

of material 1.

  In the illustrated embodiment, perforation stirrups 27, 28, on which are arranged perforation tools which can be variably positioned, are provided for each perforation cylinder 3, 4, coaxially with the axes 31, 32 of the cylinders of perforation 3 and 4. One can provide for each perforation cylinder 3, 4 also two perforation stirrups, see 27.1 and 28.1 in figure 4. On the perforation stirrups 27, 28 represented in figure 2 are arranged the tools perforation 38.1 used for delta folding, or perforation tool 38.1, for the second transverse fold. These tools cooperate with the perforation bars 36.2, fixedly provided on the periphery 34 of the perforation cylinder 4 mounted so as to be adjustable, for the second transverse fold or the perforation bars 38.2 provided in the same way for delta folding . The perforation tools 35.1 and the perforation bars 35.2, which cooperate with the latter, are fixedly formed on the peripheries 33, 34 of the two perforation cylinders 3, 4, in order to perforate in the region of a first ply transverse in the copy. The perforation strip 37.2, which for its part cooperates with the perforation strip 37.1, which is mounted on the other perforation stirrup 28 for the second transverse fold, is fixedly mounted on a cylinder of

fixed hole 3.

  The perforation cylinder 3 rotates in the direction of rotation 29 relative to the perforation slot 26 while the perforation cylinder 4 mounted so as to be adjustable rotates in the opposite direction to the previous direction of rotation so that it becomes established a continuous advance of the strip in the perforation slot 26. The perforation stirrup 28 is adjustable by displacement, with respect to the circumferential surface 34 of the perforation cylinder 4, in the direction of rotation 30 opposite to the direction of

  rotation of the perforation cylinder 4.

  The perforation bars 36.2, 37.2 and 38.2, which are shown by being fixedly arranged here (see FIG. 4), could also be mounted on other perforation stirrups 27.1, 28.1 which enclose the circumferential surfaces in the manner of shells 33, 34 of the perforating cylinders 3, 4, and therefore are also relatively adjustable or are alternately adjustable, simultaneously with perforating tools 36.1, 37.1, 38.1, which are mounted on the

perforation stirrups 27.28.

  FIG. 3 shows in a highly schematic manner a drive configuration for the perforation stirrups 27, 28 which surround the cylinders

  perforation 3, 4 in the manner of shells.

  In the alternative embodiment of FIG. 3, a perforation cylinder 3, 4 is respectively equipped with a perforation stirrup 27, 28. The perforation stirrups 27, 28 are mounted in bearings 43, 44, on pins of the axes 31, 32 of the cylinders and are equipped with a toothing 47 allowing movement in the circumferential direction of the perforating cylinders 3 and 4. This toothing meshes with an external toothing 46 of a transmission element 45 which can be arranged under the form of a sliding guide which can move or

  can rotate on an axis 31 or 32 of the cylinder.

  The two slide guides 45 located on the axes 31, 32 of the cylinders are connected to the displacement adjustment unit 48, which allows relative movement of the perforation stirrups 27, 28 relative to the circumferential surfaces 33, 34 of the cylinders of perforation 3, 4. Under the effect of the integration of a compensation unit 49 in the slide guide 50 between the transmission elements 45, on the axes 31, 32 of the cylinders, it is possible to obtain a modification of the slot perforation 26 independently of the displacement of the phase position of the perforation stirrups 27, 28 on the perforation cylinders 3 and 4. This is facilitated by the fact that the perforation displacement adjustment cylinder 4 is connected by means of 'an articulated shaft 42 to its drive pinion 41, which for its part is driven by means of the drive pinion 40 of the perforation cylinder 3. Taking into account the articulated shaft 42, it is possible to obtain s ans problem a relative movement of the movable cylinder 4, relative to the perforation slot 26. The slide guides 45, which are interconnected via the slide guides 50 and the compensation unit 49, can be positioned in common, one with respect to the other since a correct adjustment of punching tools 36.1, 38.1 relative to the punching bars 36.2, 38.2 must be guaranteed for each folding mode. If there is a displacement of the rotational position in the perforating stirrup, the perforating stirrup, which houses the perforating bars, which correspond to it, is automatically jointly shifted according to the folding mode. FIG. 4 represents the kinematics of a pair of perforation cylinders, two perforation stirrups 27, 27.1 and 28, 28.1 being formed on each of the cylinders 3, 4. The perforation stirrups 27, 27.1, 28 and 28.1 are installed overall in bearings 43, 44 and 54, 55 on the axes 31, 32 of the cylinders. Unlike the embodiment according to claim 3, two external teeth 46, 52, which correspond respectively, perforation stirrups 27, 27.1 and 28, 28.1, are located on the transmission elements 51 shown here. A displacement unit 48, which is associated with the two slide guides, is provided in a manner analogous to the embodiment of FIG. 3, this unit acting on the transmission elements 51, which are moved in common, a unit compensation 49 already described above with reference to FIG. 3 being integrated

in the sliding guide 50.

  In the embodiment of Figure 4, the perforation bars 36.2, 37.2 and 38.2, which are fixedly mounted on the periphery 33, 34 of the perforation cylinders 3, 4, are also mounted on perforation stirrups 27.1,28.1 so that the latter are also adjustable by displacement in the circumferential direction relative to the circumferential surfaces of the perforation cylinders 3, 4, so that simultaneous displacement of the perforation bars 36.2, 37.2,38.2 and the perforation tools

36.1,37.1 and 38.1 is possible.

LIST OF REFERENCES

  1 Strip of material 2 Direction of flow of the strip 3 Fixed perforation cylinder 4 Adjustable perforation cylinder 6 Perforation knife, 2nd transverse fold 7 Perforation knife, 3rd fold 8 Cutting cylinder 9 Folding cylinder 10 Blade 11 Circumferential surface 12 Copy folded transversely 13 End of copy 14 End of copy 15 1st transverse folding (parallel folding) 16 Other folding cylinder 17 Folding blade 18 Circumferential surface 19 2nd transverse fold ( double parallel fold) 20 Transport cylinder 21 Circumferential surface 22 Double folded copy 23 Folding back 24 Copy end 25 Copy end 26 Perforation slot 27 Perforation stirrup 27.1 Perforation stirrup 28 Perforation stirrup 28.1 perforation 29 Direction of rotation Direction of rotation 31 Cylinder axis 32 Cylinder axis 33 Circumferential surface 34 Circumferential surface e 35.1 Perforation, 1st transverse fold 35.2 Perforation strip 36.1 Perforation tool, 2nd transverse fold 36.2 Perforation strip 37.1 Perforation tool, 2nd transverse fold 37.2 Perforation strip 38.1 Perforation tool, delta fold 38.2 Strip 39 Pinion drive system 41 Pinion 42 Articulation shaft 43 Punch caliper support 44 Punch caliper support Slide guide 46 External teeth 47 Internal teeth 48 Movement unit 49 Compensation unit Slide guide 51 Slide guide 52 Outer teeth 53 Inner teeth 54 Turning 27.1 of the punching stirrup Turning 28.1 of the punching stirrup

Claims (17)

  1. Device for perforating strips of material (1) using perforation tools, which are arranged on perforating cylinders (3,4), which form perforations in the copies, and this in a precise position by in relation to transverse folds, and in which the perforation position is adjustable during the operating cycle and the perforation tools (35.1i, 36.1, 37.1, 38.1) cooperate with associated perforation bars (35.2, 36.2, 37.2, 38.2) for producing transverse perforations, characterized in that the perforation tools (36.1, 37.1, 38.1) are arranged, around the perforation bars (36.2, 37.2, 38.2), on one or more perforation stirrups (27, 27.1, 28 , 28.1) which are coaxial with the perforation cylinders (3,4), one of the perforation cylinders (4) being adjustable relative to the other perforation (3).   2. Device according to claim 1,   characterized in that the perforation stirrups (27,27.1.   28,28.1) are mounted on the axes (31,32) which pass through the perforation cylinders (3,4).   3. Device according to claim 1, characterized in that one of the perforation stirrups (28) is adjustable by displacement relative to the direction of rotation of the perforation cylinder (4), opposite to the direction   of rotation of the perforation cylinder (4).   4. Device according to claim 1, characterized in that a perforation tool (35.1) and a perforation strip (35.2) are fixedly mounted   on the periphery (33,34) of the perforation cylinder (3,4).   5. Device according to claim 1, characterized in that on a first perforation stirrup (27) located on one of the perforation cylinders (3,4) is disposed a perforation tool (36.1) which cooperates with a   perforation bar (36.2) of the opposite cylinder (3,4).   6. Device according to claim 1, characterized in that on the first perforation stirrup (27) located on one of the perforation cylinders (3,4) is disposed a perforation tool (38.1) for the delta folding mode , which cooperates with a perforation strip   (38e) located on the opposite cylinder (3,4).   7. Device according to claim 1, characterized in that on another perforation stirrup (28) located on one of the perforation cylinders (3,4) is disposed a perforation tool (27.1), which cooperates with a bar perforation cylinder (37.2) fixedly disposed on the periphery (33) of the opposite perforation cylinder (3,4).   8. Device according to claim 1, characterized in that the perforation bars (36.2, 37.2, 38.2) are arranged on other perforation stirrups (27.1, 28.1) which are mounted coaxially with the perforation cylinders (3,4) and are adjustable by   displacement in relation to these.   9. Device according to claim 1, characterized in that the perforation stirrups (27,27.1; 28,28.1) are arranged on the axes (31,32) of the cylinders   perforation (3,4), in bearings (43,44; 54,55).   10. Device according to claim 2, characterized in that transmission elements (45,51) are loaded at the axes (31,32) of the cylinders, at   by means of a common control unit (48).   11. Device according to claim 10, characterized in that the transmission elements (45,51)   are arranged in the form of a slide guide.   12. Device according to claim 10, characterized in that the transmission elements (45,51) comprise at least one force transmission location (46.52).   13. Device according to claim 11, characterized in that the application locations of   force (46,52) are arranged in the form of teeth.   14. Device according to claim o10, characterized in that between the transmission elements (45,51) of the perforation cylinders (3,4) is provided a compensation device (49,50) which allows adjustment by eccentric displacement of one of the perforation cylinders (3,4) relative to the perforation slot (26).   15. Device according to claim 1, characterized in that an articulated connection (42) is provided between the drive device (41) of the adjustable perforation cylinder (4) and a transmission element (45.51).   16. Folding machine comprising a device for perforating strips of material (1) using perforation tools, which are arranged on perforation cylinders (3,4), which form perforations in the copies, and this in a precise position in relation to the transverse folds, and in which the perforation tools are movable during the operating cycle and the perforation tools (35.1, 36.1, 37.1 and 38.1) cooperate with associated perforation bars (35.2, 36.2, 37.2 , 38.2) for producing transverse perforations, characterized in that the perforation tools (36.1, 37.1, 38.1) are arranged, around the perforation bars (36.2, 37.2, 38.2), on one or more perforation stirrups (27, 27.1, 28, 28.1) adjustable by relative displacement and which are coaxial with the perforation cylinders (3,4), one of the perforation cylinders (4) being adjustable relative to the other perforation cylinder (3).   17. Folder without sizes comprising a device for perforating strips of material (1) using perforation tools, which are arranged on perforation cylinders (3,4), which form perforations in the copies, and this in a precise position relative to the transverse folds, and in which the perforation tools are adjustable during the operating cycle and the perforation tools (35.1, 36.1, 37.1 and 38.1) cooperate with associated perforation bars (35.2, 36.2 , 37.2, 38.2) for producing transverse perforations, characterized in that the perforation tools (36.1, 37.1, 38.1) are arranged, around the perforation bars (36.2, 37.2, 38.2), on one or more perforation stirrups ( 27, 27.1, 28, 28.1) relatively movable and which are coaxial with the perforation cylinders (3,4), one of the perforation cylinders (4) being adjustable relative to the other perforation cylinder (3).