JP2003291303A - Sheet paper treating rotary printing machine having punching unit and method for operating such machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a constant printing quality when a printing job is practiced while taking out of specimen sheet paper or exchange of a pile is executed without impairing the sheet paper with a rotary printing machine having a punching unit. <P>SOLUTION: When the taking out of the sheet paper or the exchange of the pile 3.7 is executed in running-on, in a first step a punching unit 2 is changed from a first operation state of executing punching the sheet paper 5 without application of punching. After passing the specific number of sheets of sheet paper 5, the process is returned to the first operating step in a second step. At that time, after the first step, sheet paper grasping devices 3.14 and 3.18 are transferred to a grasping position projected above the pile 3.7 to grasp a front edge of the not punched sheet paper 5, and the taking out of the sheet paper or the exchange of the pile 3.7 can be executed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed rotary printing press having a punching unit and a sheet discharging device for stacking processed sheets in a pile.

[0002]

2. Description of the Related Art Such a machine is known, for example, from US Pat. No. 6,037,049, and is formed from punched sheets and therefore must be handled with care in order to prevent the sheets from being damaged. A pile is stacked by this machine.

Therefore, it is specifically indicated that the machine is stopped, the sample sheets are taken out and the piles are replaced. In this case, the sample sheet can be carefully removed from the pile, but this sample sheet is representative of a certain number of other sheets that are printed after a new start of operation of the machine. It may not be. On the other hand, in the pile that is newly formed after interrupting printing, the sheet is
It does not have the required print quality from the beginning and this situation can be repeated for each new pile in a high-volume print job.

[0004]

[Patent Document 1] German Patent No. 4138278

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to maintain a constant print quality when executing a print job by a rotary printing press having a punching unit.

[0006]

In order to achieve this object, a punching unit is installed during the final printing of a rotary printing press.
In the first step, the sheet is punched out.
From the operating state of No. 2 to the second operating state in which the sheet passes through the punching unit without punching, and after passing a predetermined number of unpunched sheets, the second step At, the rotary printing press described at the beginning is operated so as to return to the first operating state.

At this time, the pile formed by the sheet discharging device is supplied with at least one sheet which has not been punched out after the first step, and thereafter this sheet is nonstop. In order to form a wedge-shaped gap between the sheet and the pile, into which an auxiliary pile platform for the exchange of piles can be inserted, in a known manner, for example by means of a sheet catcher at its leading edge. Can be captured. At this time, following the second step, when the punched sheet is further fed to this pile and the punched sheet is discharged onto the non-punched sheet , The auxiliary pile platform is slid along the underside of the unpunched sheet, which reduces damage to the punched sheet. Therefore, the operation of the rotary printing machine according to the invention as described at the beginning makes it possible to replace the piles without damaging the sheets during the final printing, and without interrupting the printing at this time. Therefore, even if the number of sheets of the print job is large on the sheet printed by one print job, it is possible to prevent variation in quality.

The unpunched sheets discharged onto the pile after carrying out the first step can also be used, for example, only when the machine is inspected for the quality of the printing performed thereby. , Punched sheets can be pulled out of the pile as sample sheets without damage.

In a further preferred embodiment of the method according to the invention:
The punching unit, after the second step, after passing at least one other sheet of paper through the punching unit,
In the third step, the second operating state is newly switched during the passage of the predetermined number of sheets, and in the subsequent fourth step, the first operating state is restored.

After the four steps shown to this extent have been carried out, on the upper side of the pile, under the punched sheet, at least one non-punched sheet each Between the at least one punched sheet, ie, as a result, between each at least one non-punched sheet, And pulling at least one sheet together with the unpunched sheet surrounding it, as a sample sheet, from the pile without damaging the punched sheet Will be able to.

By means of sample sheets which can be taken out in this way, punched and unpunched, not only the inspection of print quality but also the functioning of the punching unit, in particular It will also be possible to make adjustments taking into account any necessary modification of the punch pressure settings.

The preferred preparations for the actual removal of the above-mentioned sample sheets are the sheets that pass through the punching unit without punching after the first step and the punching immediately after the fourth step. It is advantageous to carry out the sheets that are brought through the punching unit above the pile, preferably by capturing its leading edge from below. In this way, a kind of sandwich-like part consisting of at least one punched sheet, which is located between each at least one non-punched sheet, is It is exposed in the areas of the edges aligned with each other. This sandwich can then be easily grasped and pulled out of the pile, with only the unpunched sheet being pulled along the punched sheet, As a result, the punched sheet remains undamaged.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sheet-fed rotary printing press which is equipped with a processing station in the form of a printing unit 1, which is followed by a processing station in the form of a punching unit 2 and, subsequently, a paper delivery device 3. 3 is a schematic view of a portion including a paper discharge device 3. FIG. Printing unit 1 illustrated here by way of example
Operates according to the wet offset method, the number of which constitutes the rear part of a series of printing units, the number of which is determined by the number of inks to be printed. The printing unit 1 comprises in particular an impression cylinder 1.1. In the impression cylinder 1.1, the printed sheet 5 is provided with a punch cylinder 2.2 which cooperates with a punch cylinder 2.1 of a punching unit 2 which will be described in more detail below.
The transport cylinders 4.1, 4.2, and 4.3 of the paper transfer device 4 for feeding to the paper follow. Furthermore, a sheet 5 which has been punched or, if necessary, not punched
Is delivered to the paper ejection device 3 by the punching cylinder 2.2.

In the exemplary embodiment shown, the delivery device 3 receives the sheet 5 from the punching cylinder 2.2 as it passes by the punching cylinder 2.2, and the chain transport device 3.1. Of the sheet 5 is conveyed in the direction toward the pile station 3.3 along the conveyance path passing through the lower inter-vehicle portion, and finally the sheet 5 is decelerated from the processing speed to the sheet discharge speed, and finally to the pile station 3.3. It includes a chain transport device 3.1 with a linked, gripper system 3.2 that moves in circulation during operation, which passes to a delivery sheet brake device 3.4.

In the pile station 3.3, in normal operation of the machine, the sheet 5 released from the sheet braking device 3.4 hits the leading edge stopper 3.5, and
A leading edge stopper 3.5, a trailing edge stopper 3.6 facing the leading edge stopper 3.5, and a pile 3.7 which is aligned by a side paper aligning device (not shown) and is appropriately lowered by an elevating unit as the number increases. Form. Regarding the lifting unit, only the platform 3.8 supporting the pile 3.7 and the lifting chain 3.9 supporting this are schematically shown.

A guiding device 3.10 is provided along the above-mentioned transport path. The guiding device 3.10 comprises a guiding surface 3.11 on which the processed sheets 5 are drawn over by the gripper system 3.2. Guide during operation in order to float and guide the double-sided processed sheet 5 (if a machine with a correspondingly sufficient number of printing units and sheet reversing stations is provided) Sheet 5 drawn through surface 3.11 and above
Sheet-conveying air, which forms an air cushion between them, blows out, an air outlet opening not shown here being a guide surface 3.
A guide surface 3.11 is formed over 11.

In the above-mentioned conveying path, a dryer 3.12 (for example, a hot air dryer, an infrared (IR) dryer, an ultraviolet ray (U)
V) A dryer) and a processing device in the form of a dusting device 3.13 are additionally included. The guiding device 3.10 is cooled in a manner not shown in detail, in order to prevent the guiding device 3.10 from being overheated by the drying device 3.12, so that the cooling liquid flows through it. It is formed in the form of a container.

As already mentioned, the pile 3.7 is lowered by the increased amount, whereby the sheet braking device 3.4 is moved.
The individual sheets 5 released from are discharged at substantially the same height (so-called shipping height) on the pile 3.7.

At this shipping height, there is a first sheet catcher 3.14 which is capable of entering and retracting from the catch position above the pile 3.7, By means of an adjusting cylinder 3.17, which is guided, for example, in a straight guide 3.15 and which is supported in a linked manner so as to act on it with a suitable lever device 3.16, the catching position shown in broken lines and the single wafer A first sheet catcher 3 slidable between the retracted positions shown by the solid lines, outside the area where the sheet 5 released from the paper braking device 3.4 falls on the pile 3.7. .14 is included for operation.

The leading edge of the descending sheet 5 is captured from below by the first sheet catcher 3.14 at the catch position. Subsequently, a second step is followed by at least one sheet which has been punched, the first sheet 5 which has not been punched being lowered onto the pile 3.7.
After the step of 1., if it is intended to remove the sample sheet, the first sheet catcher 3.14 is moved to the catching position.

It is likewise moveable between a capture position on the pile 3.7 and a position retracted from this capture position,
Similarly, the second sheet catcher 2. The catch position is shown in broken lines and the position retracted from the catch position is shown in solid lines.
18 is arranged at a height, here higher, offset from the height of the first sheet catcher 3.14. In this exemplary embodiment, the second sheet catcher 3.18 has a shaft that supports the leading edge stopper 3.5 in order to properly operate the second sheet catcher 3.18. It is linked to a double lever 3.19, which is supported above and whose position is adjustable by an adjusting cylinder 3.20.

In the case of taking out the sample sheet, which is assumed here, the first sheet catcher 3.14 is moved to its catching position, and the punching unit 2 is put into an operating state where punching is not performed. And then by temporarily switching, at least one sheet 5 that has not been punched has its edges captured from below, and subsequently,
After the punching unit 2 is temporarily switched to an operating state in which punching is performed, at least one sheet 5 that has been punched is placed on the sheet 5 that has not been punched. Then, by temporarily switching the punching unit 2 again to an operating state in which punching is not performed, at least one sheet that has not been punched out is replaced by at least one sheet that has been punched. After being placed on the paper 5, and then the punching unit 2 is newly switched to the operating state for punching, the punched sheet 5 is
Before continuing again on the placed, non-punched sheet 5, this second sheet catcher 3.18 is in the catch position of the first sheet catcher 3.14. It is moved to the upper capture position.

After that, both sheet catchers 3.14 and 3.18 are provided with at least one punched sheet 5 between at least one unpunched sheet 5, respectively. It surrounds the previously mentioned sandwich with the leaflet 5.

After this sandwich is removed,
Both sheet catchers 3.14 and 3.18 are retracted from their catch position.

The time points at which the sheet catchers 3.14 and 3.18 are moved to the respective catch positions are at the time points at which the operating state of the punching unit 2 is switched, and at the sheet 5
It is understood that it is adjusted according to the required transfer time between the punching unit 2 and the pile station 3.3.

In the case of non-stop pile change, only one of the two sheet catchers 3.14 or 3.18 is required. In this case, the punching unit 2 is temporarily switched from the punching operating state to the non-punching operating state, and the sheet catcher 3.14.
Or 3.18 is the first punched first piece at the earliest.
After the sheet 5 has reached the pile station 3.3, it is moved to its catching position.

In the above description, the punching unit 2 capable of switching between the operating state in which punching is performed and the operating state in which punching is not performed during the final printing of the rotary printing press.
I assumed. In order to realize this, it is advantageous to use a technique that can be extracted from the content of DE 198 49 633. In particular, punching die cylinder 2.1
Are supported on the sides 2.7 which are supported on the rollers 2.5 and 2.6 on the support surfaces 2.3 and 2.4, the roller 2.5 being supported stationary and the rollers 2.5. 2.6
Is supported by a rocker 2.8, which can be rocked by an actuator 2.9 about a stationary axis 2.10.

In FIG. 1, the punch cylinder 2.1 is in contact with the punch cylinder 2.2, ie the punch unit 2
Is in an operating state in which punching is performed during operation. When the rocking part 2.8 rocks clockwise from the position shown in the drawing, the punching cylinder 2.1 is moved into the sheet 5 guided by the punching cylinder 2.2. Separate from the punch cylinder 2.2 to a position where it no longer contacts.

Furthermore, the bearing surfaces 2.3 and 2.4, which are held in contact with the rollers 2.5 and 2.6 by means of the connecting rod 2.12 via the pins 2.11, have the side 2. When the actuator 7 operates the actuator 2.9, the pin 2.11.
3 is configured and arranged to move in a circular motion about 3, so that the side 2.7 is connected to the connecting rod 2.1.
The state of being locked by 2 is the actuator 2.9.
It is also retained when moving the side part 2.7 by operating the.

That is, as a whole, the punching unit 2 has the actuator 2.9 during the final printing of the rotary printing press.
Thus, it can be seen that it is possible to switch between an operating state in which punching is carried out and an operating state in which punching is not carried out and vice versa.

Therefore, the operation method of taking out the sample sheet and exchanging the non-stop type piles ultimately results in the operation of the actuator 2.9 of the punching unit 2 and the attachments to the sheet catchers 3.14 and 3.18. It can be realized by harmonizing the operation of the adjusting cylinders 3.17 and 3.20 respectively.

[Brief description of drawings]

1 shows a machine suitable for carrying out the steps of a method for operating a sheet-fed rotary printing press according to the invention.

[Explanation of symbols]

1 printing unit 1.1 The impression cylinder 2 punching unit 2.1 Punching body 2.2 Punching cylinder 2.3, 2.4 Support surface 2.5,2.6 Roller 2.7 Side 2.9 Actuator 2.8 Swing part 2.10 axis 2.11 pin 2.12 Connecting rod 2.13 Link connection point 3 Paper ejection device 3.1 Chain conveyor 3.2 gripper system 3.3 Pile station 3.4 Sheet braking device 3.5 Leading edge stopper 3.6 Trailing edge stopper 3.7 pile 3.8 Platform 3.9 Lifting chain 3.10 Guidance device 3.11 Guideway 3.12 Drying device 3.13 Sprinkler 3.14, 3.18 Sheet capture device 3.17, 3.20 Adjustment cylinder 3.15 Straight ahead guide 3.16 Lever device 3.19 Double lever 4 Paper passing device 4.1, 4.2, 4.3 Transport cylinder 5 sheets of paper

Continued front page    (71) Applicant 390009232             Kurfuersten-Anlage             52-60, Heidelberg, Fede             ral Republish of Ger             many (72) Inventor Jens Friedrichs             Germany 69151 Necker Gemi             Und Peter-Schnerbach             Utrase 46 (72) Inventor Jens Heroonymus             Germany 64293 Darmstadt             At Victoria Strasse 92 (72) Inventor Ralph Watlinger             Germany 68766 Hockenhai             Muha. -Pa. -Muller-Sto             Race 13

Claims (5)

[Claims] 1. A method of operating a sheet-fed rotary printing press having a punching unit and a paper ejection device for stacking the treated sheets into a pile, the method comprising the steps of: In the meantime, from the first operating state in which the punching unit (2) is punched out of the sheets (5) in the first step,
(5) The punching unit without punching
After switching to the second operating state of passing (2) and passing a predetermined number of unpunched sheets (5),
An operating method comprising returning to the first operating state in a second step. 2. After the first step, the edge of the sheet (5) which has passed through the punching unit (2) without being punched is lowered above the pile (3.7). The method of operation according to claim 1, wherein 3. The punching unit (2) is attached to the second unit.
After the step of, at least one other sheet of paper (5) is passed through the punching unit (2), and then in a third step of a period of passing a predetermined number of sheets of paper (5). The second
The operating method according to claim 1, wherein the operating state is newly switched to, and the first operating state is returned to in a subsequent fourth step. 4. Immediately after the fourth step, the edges of the sheet (5) punched and passed through the punching unit (2) are captured from below above the pile (3.7). The driving method according to claim 3, wherein 5. Operation is possible in first and second operating states, in the first operating state the sheet of paper (5) is punched through and in the second operating state punching is performed. A punching unit (2) for passing without treatment, a paper discharge device (3) for stacking the processed sheets (5) in a pile (3.7), and an upper part of the pile (3.7). A first sheet catcher (3.14) able to enter and retract from the catch position and a catch position above the pile (3.7). A second sheet, which can be and is retracted from the catching position, wherein at the catching position the first sheet catcher (3.14) occupies a different height from the height it occupies at the catching position. A sheet-fed rotary printing press having a sheet catcher (3.18).