FR2549811A1 - ROTATING ROLLER MOUNTING, FOR PRINTING MACHINES - Google Patents

Abstract

A. MOUNTING OF ROTARY ROLLERS, FOR PRINTING MACHINES. B. MOUNTING OF ROTARY ROLLERS, CHARACTERIZED IN THAT THE ROLLER MOUNTING IS PROVIDED BELOW THE PRINTING MECHANISM 2 AND BETWEEN ITS SIDES 1 BY THE COMBINATION INCLUDING A BELT DRIVE 14 BETWEEN THE PRINTING MECHANISM 2 AND THE PERIPHERY OF THE NEW ROLLER 13, WHICH IS TILT INTO A JUNCTIONING POSITION DEFINED BY AN UPPER TILTING ZONE AGAINST THE KNIFE AND BRUSH ARM 18. C. THE INVENTION RELATES TO A ROTARY ROLLER MOUNTING DEVICE FOR A PRINTING MACHINE.

Description

t Rotating roller assembly, for

to print ".

  The invention relates to a two-arm rotating roller assembly for rotary printing machines, with two retractable rollers, successively and connected by an automatic joining operation, these rollers being removably housed in two sets of two-armed arms. rollers pivoting about a central axis, each assembly of which is engaged with a pinion path, one being connected to the other by a shaft carrying two gears and the center distance of the axes of rotation of the two rollers as well as the interval between the axis of rotation of the roller arms and the base being smaller than the diameter

of the whole roll.

  In known roller assemblies such as those described in DE-OS No. 1,053,529, the two sets of roller arms are mounted on the flanks of the roller frame by a fixed axis connection. Such roller assemblies require very long roller arms because of the relatively large diameter of the rollers and a large tilting zone, corresponding, all

  the other means to be provided with additional space, outside this area of

  They also have to be able to tilt out of this zone. This also applies to knife and broom arms as is known for example from document CH 428 789. Roller assemblies 5 of this type require a distinct construction having a relatively large size. and

  heavy molding walls, absorbing oscillations.

  Such disadvantages have a particular effect on the space requirement if larger sets of machines with several printing mechanisms are to be placed one after the other and each printing mechanism must have a roller arrangement. housed separately in

walls of the buildings.

  In the published document DE-AS 1 235 335 there is proposed a solution seeking to avoid some of the drawbacks mentioned above for a rotational mounting of a roll, giving a compact and space-saving design for this purpose, 20 two two-armed roll holders are no longer connected

  to a fixed central axis but the two roll holders are mounted on short axis members of the side frame.

  The distance between the two rollers on the two-arm roll holder is therefore smaller than the diameter of the new roll, which makes it possible to use relatively short roll-carrying arms of a single construction.

low compared to the base.

  The particular disadvantage of this solution lies in the fact that after the gluing operation of the new roll, it must pivot it in an upper tilting zone to be able to change the unwound roll Due to this condition, it is necessary to have all the facilities necessary for the operation of jnnction, outside the upper tilting zone of the roller, which gives a mounting of high construction rollers, with walls of

built, distinct.

  The other disadvantages of this solution lie in the fact that it is actually possible to stick only by hand when stopping the machine. In the document above, it is indicated that according to one embodiment of the solution of the invention, it would be possible to perform a completely automatic gluing of the feed roller on the running belt. Taking into account the means indicated, it appears however that this solution is questionable even for machines turning very slowly; it is provided for this purpose, for the acceleration of the roll, to use a drive acting on the center of the roll, and unlike the drive belt acting on the periphery of the roll, is very difficult to control

  at the speed of travel of the reeled web.

  The object of the present invention is to preserve the advantages of the known solutions, to overcome the drawbacks of these known solutions and to develop a roller assembly of a safe, inexpensive, low-cost operation.

  material and resulting in a space-saving solution.

  The invention proposes to develop a rotary two-armed roll assembly for rotary printing machines, enabling an automatic joining operation to be carried out without interrupting the web of unwound material and without reducing the speed of the machine. , successively from two interchangeable rollers mounted on each time

  two roller arms, with unwinding of the belt.

  Each roller arm must be engaged with gears, which are connected to each other.

  by meshing with a tree bearing two gables.

  The assembly must be executed in the form of a compact construction, very compact so as to remove any distinct construction In addition, the center distance of the two rollers must be adapted-and the interval between the axis of rotation of the arms roll holder and the base must be smaller than the diameter of the complete roll. The drive for the acceleration of the new roll must be done with simple means, ensuring the adaptation of the peripheral speed to the running speed of the reeled web of the roll which ends, while avoiding with certainty the break of the band, and without this modifying

  important way compact construction, sought after.

  The joining operation between the reeled web of the emptied roll and the beginning of the web of the new roll must be done with knife and broom arms.

  requiring very little space.

  According to the invention, the roller arrangement with two tilting arms is between the side walls (flanks) and directly below the printing mechanism. This arrangement has the advantage of no longer needing the surface of the frame which is indis25 thinkable for a separate construction and thus allow to remove the walls of the frame These effects are particularly advantageous if several printing mechanisms with roller assemblies must

  to be united one behind the other to form important sets of machines.

  The low and compact mounting of the device between the walls of the printing mechanism is made possible by simply tilting up the two-armed roll holder loaded with the new roll only in a zero zone. to 254981 i fifteen degrees depending on the maximum or minimum diameter of the roller, on a knife-holder arm and broom, fixed for the joining operation, to put it in a sizing position The knife-and-broom arm is provided at a short distance from a tangent to the complete roll, tangent at an angle of about 45 degrees to the horizontal direction. Its fixed mounting for this operation makes it possible to eliminate the elements generally necessary for the movement and allows a very advantageous integration from the point of view of space in the printing mechanism. To accelerate the new roll which must be glued, and the At the running speed of the web, it is provided in combination with the roller assembly and the knife arm and brush, between the printing mechanism and the periphery of the new roller, substantially in a horizontal position, a means for belt drive which can be coupled to the machine drive and which can be engaged or disengaged, and which in contrast to the roller drive means acting on the axis of the roller relatively simple means, an accurate and safe adaptation of the peripheral speed of the new roll at the speed of scrolling the strip unwound from the empty roll, in thus ensuring a junction without requiring a slowing down of the speed of the machine and avoiding tearing of the paper The compact, advantageous assembly, combined of the roll holders, the belt drive and the knife arm and broom according to the invention, because the new roll can tilt down in a

  lower tilt, once the junction achieved.

  For this, the roller is driven until it reaches a defined unwinding diameter, the radius then being less than the interval between the axis of rotation of the roller and the ground surface. Then, the rolled reel is tilted in the lower tilting zone 5, in a feeding position and after placing the new roller,

  switch it to the renewal position.

  The present invention will be described in more detail with reference to an exemplary embodiment shown diagrammatically in the accompanying drawings, in which: FIG. 1 is a schematic side view of the mounting of the roller on the mechanism

  printing after the execution of a link, the belt drive being still tilted.

  Figure 2 is a schematic top view of the assembly of the roller section along A-A. FIG. 3 is a schematic view of the mounting of the roll in the case of a structure of

more important machine.

  Figure 4 shows the roll arms in the connection position, the belt drive being tilted.

  FIG. 5 shows the roll arms in the tilted position. The new roll is at a defined roll diameter, and

the finished roll is removed.

  Figure 6 shows the roller arms in the feed position.

  Figure 7 shows the carrier arms in the renewal position.

  The rotational mounting of a roller is provided between the two sides 1, 1 'of the printing mechanism and below the printing mechanism 254981 i 2 (FIG. 1). The rotating roller arms 3 and 3' are mounted on the axis elements 4 and 4 'provided in the flanks 1, 1' of the printing mechanism; a toothed gear or a ring gear 5 and 5 'is located on the axis elements, between the sidewalls 1 and 1' of the printing mechanism and the carrier arms 3 and 3 'being fixed thereto; the toothed gear or the ring gear cooperates with an intermediate gear

  6 and 6 'with a pinion 8 and 8' fixed on the axis 7.

  The shaft 7 is driven by unrepresented means

  for the implementation of the positions described later of the roller arms.

  The distance between the receiving bearings 9 and 9 'as well as 10 and 10' for the respective chuck 11 and 11 'and the interval between the axis of rotation of the cylinder-carrying arms 3 and 3' and the plane of rotation. base, free, is smaller than the diameter of the entire cylinder 13 Above the winding cylinder 13 received by the cylinder-carrying arms 3 and 3 'in the receiving bearings 9 and 9', is the belt drive 14 which can be coupled to the drive of the machine (not shown) and tilted against the winding cylinder 13 below the color device 15 which is in the printing mechanism 2, and which is provided with two 16 and 17, is the blade arm and blade 18 fixed, to ensure the gluing, this arm being at a short distance from the tangent to the winding cylinder 13, inclined to 45 relative to the horizontal direction, between the flanks 1 and 1 'of the printing mechanism Knife and broom 18 includes the tilting broom and the knife which are not shown since they do not form part of the invention. Depending on the diameter of the roll 19 which is taking place, a material web 20 of the cylinder

  or after the execution of the junction (as shown in FIG. 1) and a strip of material 21 of the cylinder 13 are sent into the printing mechanism 2 while passing over the guide rolls 16.

  Figure 1 shows a roller 13 which is at maximum diameter; after the acceleration operation, the belt drive 14 is still in the tilted position and is connected to the material web 21 unwound from the roller 13 The old web 20 is threaded The web 21 of the web 13 is driving in the printing mechanism 2 over the guide cylinder 16 and when the junction is made,

  the belt drive 14 is tilted downwards.

  For a maximum diameter of the roll 13 as shown in FIG. 1, the junction operation is carried out, the cylinder-carrying arms 3 and 3 'being in a horizontal position. When the diameter of the roll 13 is smaller than the maximum diameter, the roll is tilted up to 15 upwards against the arm

  knife holder and brush 18, in an end position defined by a light barrier (Figure 7).

  This upper tilting zone, limited to 15, serves at this time to compensate for the differences between a maximum diameter and a minimum roll diameter. From this last position, or the horizontal position, preceding the carrier arms 3 and 3 ', the roll 13 is unwound to a determined diameter which makes it possible to extract it (FIG. 1).

  downward, in the opposite direction of the hands of a watch, over the free base plane (FIG. 5).

  In the meantime, the residue of the roll 13 with its mandrel 12 has been removed from the receiving stage. When the above-mentioned diameter of the roll 13 is reached, a light barrier (not shown) triggers a switching pulse which ensures a tilting.

2554981 1

  roller arms 3 and 3 'in the feed position through the shaft 7 (Figure 6).

  The pair of roller arms 3 and 3 ', open, without mandrel, then moves unhindered, passing in front of the knife arm and brush 18 and the belt drive 14 In the feed position, is prepared immediately a new roll 13 with its mandrel ll 'that is put between the

  printing mechanism (Figure 3) in the position 10 of the roll.

  After this operation, it controls another rotational movement of the roller holder arms 3 and 3 'in the renewal position (Figure 7); when this position is reached, the receiving bearings 10 and 10 '(9 and 9') open, are below the plane of the mandrel 1 which is in the standby position 13 'The roll 13' is then moved horizontally in the direction of the open receiving bearings 10 and 10 '(9 and 9') and is raised to the horizontal roller receiving position (FIG. 1) by the roller bearing arms 3 and 3 'swinging in the clockwise direction The receiving bearings 10 and 10 '(9 and 9') are then closed. When the roller reaches the residual diameter, a light signal (not shown) according to the corresponding diameter, the new roll 13 'is tilted either already in the roller receiving position (FIG. 1) or in a position (FIG. 3) against the knife and broom arm 18 for the collating operation, in a known manner, that is to say that the drive 14 is connected to the drive of the machine and is tilted with When the roll 13 'is accelerated to the speed of the web, the arm broom 18 (broom not shown) pushes the web of material 21 (20) unwound from the roll 13 (19) against the periphery of the web. roll 13 'and thus performs the bonding At the same time, the not shown knife cuts the old band 21 (20) and the operation described above takes place in the succession of steps described.

2 5 4 9 8 1 1

he

Claims (3)

R E V E N D I C A T IO N S   1) Roller assembly, two-armed rotary for rotary printing machines, with two retractable rollers successively connected by an automatic joining operation, these rollers being removably housed in two sets with two tilting roller arms around a central axis, each assembly of which is engaged with a pinion path, one being connected to the other 10 by a shaft carrying two gears and the center distance of the axes of rotation of the two rollers as well as the interval between the axis of rotation of the roller arms and the base being smaller than the diameter of the entire roll, characterized in that the roller arrangement is provided below the printing mechanism (2) and between its flanks (1), by the combination comprising a belt drive (14) between the printing mechanism (2) and the periphery of the new roller (13), this drive being capable of being connected to the drive of the machine and D to be applied against the roller (13) when it is in the junction position, and a fixed blade arm (18) provided for the joining operation, the new roller (13) being tilted in a junction position defied by an upper tilting zone against the knife-and-broom arm (18) and then after the junction has been performed and the belt drive (14) is tilted back after having reached a defined roller diameter, it tilts in a lower tilting zone through the vertical which intersects the axis of rotation of the roll holder to come into a feeding position, then in a renewal position and a position receiving rolls.   2) Device according to the claim   1, characterized in that the wiper arm and fixed knife (18) is provided at a small distance parallel to the tangent to the periphery of the roll and at an angle of 45 relative to the horizontal direction.   Device according to claim 1, characterized in that the upper tilting area required for the junction position is maximum of 15.