JP3002153B2 - Method of controlling an automatic printing plate changing process of a printing press and corresponding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for controlling an automated printing plate changing process and a corresponding device, and more particularly to a method for controlling an automated printing plate changing process on a printing press, for example a sheet-fed offset printing press. After input of at least one operation command, a series of operation steps, namely, positioning of each predetermined plate cylinder position, clamping / unclamping or locking / unlocking of the printing plate, and a predetermined direction of the plate cylinder The present invention relates to a method of performing at least one torsion operation step acting by a predetermined angle value, and activating at least one state indicating unit after each operation step.

Further, according to the present invention, a control unit is provided in the printing press, and after the control unit inputs at least one operation command, a series of work steps, that is, positioning of a predetermined plate cylinder position, Each operation process of clamping / unclamping or locking / unlocking the printing plate and twisting the plate cylinder in a predetermined direction by a predetermined angle value is performed, and at the end of each operation process, at least one state indicating unit is turned on. Device that can be activated.

[0003]

2. Description of the Related Art In the case of sheet-fed printing presses, devices for semi-automatic or fully automatic printing plate changing processes are known.
The printing plate to be guided on the plate cylinder is adjusted in a magazine or a changer mounted in front of the printing press as a protection. After actuation of the corresponding actuating element, the corresponding position of the plate cylinder is determined in a program-controlled manner, and subsequently the printing end of the printing plate resting on the plate cylinder is moved by the corresponding lock bar onto the printing plate. Lifted by release of clamp to end. The used printing plate is then removed by the reverse rotation of the plate cylinder and transported into the corresponding receiving device or storage compartment of the printing plate changer. After the printing plate has been almost completely fed into the corresponding exchanger by the reverse rotation of the plate cylinder,
The printing start clamp (actuation of the clamp bar assigned to the printing start position) is released, and subsequently, the printing plate is
The printing start bar can be pulled out manually or by a corresponding device (feed roller). Following that,
A new printing plate is supplied by inserting the edge assigned to the printing start position into the opened printing start bar. Inspect the exact register (print the plate,
After being placed on an electrically interrogable register pin), the printing start bar is closed (clamped) and a new printing plate is pulled onto this plate cylinder by the forward rotation of the plate cylinder, The printing end of the printing plate is pulled by a corresponding device (contactable roller) until it can be inserted into a lock bar assigned to the printing end.
Then, finally, the newly loaded printing plate is pulled by a corresponding pulling movement of the printing end bar.

[0004] An automated changing device for each printing plate, in which each such requirement is indicated first, is known from DE 4339344 A1.
This document also describes corresponding operating steps for the automated exchange of printing plates.

[0005] In addition to the work steps that are performed fully or partially automated for the exchange of printing plates, in addition to the initiating steps, inquiries are required to ensure a smooth process. In that case, first, it is described that an inspection is made using a so-called electrically inquirable register pin to check that the leading edge of the printing plate is correctly placed as a register. As is known from DE 43338664, such an electrically interrogable register pin is not only used for starting the clamping process, but also according to this known method, It is also checked whether the printing plate in the bar has left the bar (after opening the clamping stage). In this case, another program sequence for changing the printing plate is that the printing plate fed by the reverse rotation of the plate cylinder into the corresponding receiving device leaves the detection area in the printing start bar or the register pin. Will be shut off. With this additional inquiry,
In particular, it is possible to avoid that the printing plate taken out first and then fed back onto the plate cylinder immediately upon the forward rotation of the plate cylinder (for example, the printing plate is
Because you forgot to remove it from the detection area of the print start bar).

German Utility Model No. 941125
No. 4 discloses an apparatus for controlling an automated printing plate changing process, which comprises a driven feed roller and a freely rotatable impression cylinder roller for the printing plate. A sensor device is provided for detecting the movement of each impression cylinder roller for the inspection of the prescribed feed process. In this device, the rotational position of the freely rotatable impression cylinder roller is detected, so that, in particular, the printing plate used is fed from a clamp bar assigned to a predetermined minimum section of the plate cylinder or a printing start position. Can be detected. If the rotation of the impression cylinder roller cannot be detected, or if the impression cylinder roller cannot perform a predetermined number of minimum rotations, an error notification can be displayed and the printing plate exchange process is shut off.

[0007] Despite the additional queries known from the prior art (performed during the automated printing plate changing process, depending on the result, additional work steps may or may not be started) In addition, there are a number of possible disturbances, which can cause, in particular, a considerable partial damage to the devices used for semi-automated or fully-automated printing plate exchange. For example, semi-automated printing in which an old printing plate is pulled out of the protection unit only after the corresponding command is started by the operator, and then a new printing plate is inserted into the printing start bar. If the plate exchange process can be performed, the exchange program
It is substituted by inputting accordingly at the control console of the printing press. In this case, in particular, if another operator intends to continue the exchange process which has been started, the printing plate is crushed during the reverse rotation of the plate cylinder due to a poorly installed printing plate. Or, each device used in the replacement process may be bent in the protection unit. In addition, in each known control for automatically exchanging each printing plate, for example, after starting the operation of the printing press, it is not always easy to detect whether each printing plate has been exchanged by each plate cylinder. Also,
An emergency command (eg, an emergency stop) activated during the replacement process immediately terminates the started replacement process,
As a result, in a given situation, or in each operation step that is not closed, the replacement step must never be started anew. This predetermined situation, or the work steps that are not closed, is the reason for the possibility of damage to the elements used in the printing plate or in the replacement process described above. In this case, it is particularly critical that the printing plate supplied to the plate cylinder is mounted on a clamping bar assigned to the printing start position, but the printing end position of the printing plate is detected by a corresponding clamping device. And there is a situation that it cannot be attached to this device. Indeed, it is easy to see in this case that the printing plate held on only one side is impaired by reverse rotation of the plate cylinder by more than a predetermined amount. This is because in such a situation, the printing plate will eventually be immersed in the ink plate roller.

[0008]

SUMMARY OF THE INVENTION The object of the invention is to improve a method according to the preamble of the method claim and an apparatus for carrying out the above-described method according to the preamble of the device claim. The disadvantages can be avoided and the printing plates can be replaced, in particular the replacement process, once started on the printing press, can be reliably performed again after an interruption, or can be performed again from the beginning. Is to do so.

[0009]

According to the method of the present invention, a corresponding marker is stored in a nonvolatile manner for an activated status indicator and the execution of other subsequent work steps is performed. Thereafter, the stored marker is set to the release state, and a signal for inhibiting the start of the operation of the predetermined operation command is generated by the at least one activated state instruction unit. The problem is solved by terminating by canceling the operation of.

Further, according to the apparatus of the present invention, the control unit comprises:
It has at least one non-volatile, repeatedly writable memory unit in which a corresponding marker can be stored for the activated status indicator, and After a corresponding execution of the working step, the stored marker can be deleted again,
The control unit can generate a signal for inhibiting the start of the operation of the predetermined command by the at least one activated state instruction unit, and terminates the inhibition signal by releasing the operation of each state instruction unit. It is solved by.

In summary, in the case of an exchange process in which each operation of a predetermined sequence is performed under program control, especially after an interruption of the exchange process in an unacceptable manner (eg emergency-interruption) It is necessary to avoid a new start or a continuation based on incorrect preconditions. According to the present invention, this means that at the time of the control performed in the replacement process, a marker or a remanent marker is set / described as information depending on the execution of a predetermined work process. This is achieved by being erased again depending on the execution of the work process. In particular, this marker / remanent marker makes it possible to determine whether the printing plate is completely mounted on the plate cylinder. Set / deleted marker /
Depending on the remanent marker, at least some commands that can be executed can be blocked, in particular
A new start of the printing plate exchange process can be prevented.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS The embodiments of the invention are set out in the respective dependent claims.

According to the present invention, during the automated printing plate exchange process, when starting or ending the predetermined operation process in a memory included in the control unit that executes each operation process of the exchange process, a so-called “printing plate exchange process” is performed. The marker is set, that is,
Provided for the replacement process, at least one of the series of each work process, by at least one work process, at least one state indicating unit is activated, at least after the execution of the work process subsequent to the series of replacement process, The operation of the state instruction unit is released. The marker (state indicating unit) indicating the predetermined state is deleted again in the corresponding memory of the control unit after the end or start of the indirectly or directly following work process. In other words, in other words, a predetermined area of the entire plate changing process is parameterized by one or more markers, depending on the state, i.e. the specific and especially manually activatable processes are set / set It can be executed or started only depending on the presence or absence of a marker that has not been set. A set marker here is, in particular, a bit being set in the memory of the control unit that performs the exchange process. At this time, according to the embodiment of the present invention, various markers are allocated to a predetermined period or a portion during each work process to which the replacement process is assigned, that is, a new start means of the replacement process or each of them. Means for manually changing the printing plate using a corresponding manual start of the clamping and locking process;
It has been proposed to make it variable depending on the set or unset markers.

In another configuration, during an automated exchange process, for example after clamping of the printing plate leading edge, a corresponding marker is set and the printing end of the printing plate is clamped in a corresponding locking bar. Only when locked can it be suggested to reset or erase this marker again. Thereby, before mounting the printing end of the printing plate,
If the program of the replacement process is stopped by switching off the printing press or starting the emergency shutoff command, the replacement program is restarted from the beginning or reaches a predetermined position by inquiry of the set marker. As a result, it is possible to prevent the plate cylinder from operating and the printing plate that is incompletely mounted from being damaged.

According to an embodiment of the present invention, it is also proposed to permanently store a predetermined marker or at least one marker, in particular an E ² PROM.
Alternatively, it can be performed by storage in a so-called flash-EPROM. Therefore, even when the printing press is completely shut down, it is possible to activate or completely suppress a predetermined operation command for starting the replacement process depending on the set or unset marker when the printing press is restarted. You can do so. In addition, when the presses are activated on the press control console, instructions regarding the completely closed replacement process at each press can be displayed. A particular advantage of the method according to the invention and of the device implementing the method is that no additional sensors or other transmitters need to be provided. that time,
The areas assigned between each work step (predetermined commands are interrupted or actuated) (described in the following embodiments) are the work steps for setting the markers, which are assigned each time and It only takes place depending on the fact that a subsequent work step to erase the marker is performed.

[0016]

Embodiments of the present invention will be described below with reference to FIG.

FIG. 1 shows each operation performed in the automated printing plate changing process together with two markers. In this case, the printing plate exchange process described above is advantageously carried out using the exchange device shown at the beginning of the description.

For example, after a menu for replacing each printing plate is selected from a control console of a printing press (not shown), an operation command is introduced to the corresponding printing press to execute the program “printing press n printing plate n”. Replace is activated. Subsequently, in order to release the printing end of the printing plate provided on the plate cylinder, by the control of the printing press, the plate cylinder is
The printing press is set to a predetermined position. At this time, the operation starting and positioning steps are described as "DE positioning" in FIG. In this position, the fixed actuators cooperate with the corresponding devices of the plate cylinder, in particular,
The clamp can be released to free the printing end of this plate. At this time, this work process is shown in FIG.
Open E-bar ". From this point on, and after performing this operation, the subsequent edge of the printing plate is no longer held by the DE-bar. Subsequently, the used printing plate is removed and sent through its subsequent end. The position setting of the so-called printing start position is shown in FIG.
Is described after the work process “DA positioning”. The printing cylinder is then rotated in a reverse direction until the subsequent end of the printing plate on this printing cylinder is almost completely fed into the corresponding changer.

After the printing plate is taken out and fed in the work process "DA positioning", the control unit starts the work process "Open DA-bar", that is, the DA-bar is operated by the fixed operating devices. Is released.
In the case of a fully automated printing plate changer, the used printing plate is removed and fed by a corresponding feed roller, or in the case of a semi-automated printing plate changer, the used printing plate is protected by a protection unit. From the exchanger configured as
Pulled out by hand.

After the used printing plate has been removed from the DA-bar and fed or received, the operation "close DA-bar" is activated, in particular by means of an electrically interrogable register pin. Thereby, the printing plate fed through the feed rollers, in a fully automatic manner, or manually into the open printing start bar, is clamped at the exact position as registered. The printing end position is then settled by the start of the working process "DE positioning", for which the plate cylinder is rotated forward until a new printing plate is completely mounted on the outer circumference of the plate cylinder. You. After the end of the mounted printing plate has been inserted into the clamping bar assigned to the printing end, the operation "Close DE-bar" control is activated, and subsequently, in particular, the printing press On the control console, the instruction "End of plate exchange for printing press n" can be displayed, so that the corresponding replacement process on the next printing press can be started.

According to the invention, the marker is set by the execution of the operation step "Open DE-bar" in the control unit or in the memory of this control unit, the resetting or erasing of this marker being carried out immediately. It has been proposed that the process be performed for the first time in the next operation step, that is, in the operation step "open DA-bar". Further, similarly, after closing the print start bar started by the inquiry of the electric register, the "DA-
It is proposed that the marker be set again by "close the bar" and that this marker be reset or erased again in the immediately following operation step "close the DE-bar" as well. In FIG. 1, in the lower stage of the state indicator "marker" indicating that the plate is not completely mounted on the plate cylinder,
The two intervals defined between the set and the associated reset are indicated by the reference symbol "A". In this case, according to the invention, in the case of a correspondingly set marker within the interval "A", a new replacement step, in particular after the end of the program or after a new press, is performed by the control unit which controls the replacement step. It has been proposed to be able to start at the start of operation. At that time, the exchange process once started,
The process must continue until the set marker is reset by a corresponding manual command input. In the embodiment of FIG. 1, this is, for example, after the execution of the operation step “Open DE-bar”,
If a situation arises in which it is desired to stop the program during the work process “DA positioning”, the work process needs to be terminated in the work process “Open DA-bar” in order to reset the set marker again. That is. If this condition (the marker is set subsequently) is not fulfilled, a new plate exchange process cannot be started,
As a result, if the printing plate on the plate cylinder and the corresponding changers are correspondingly damaged, it is not possible to rotate the plate cylinders accordingly and to activate the corresponding changers.

According to an embodiment of the present invention, in particular, E ² PRO
In memories configured as M to flash-PROM, it has been proposed to set or reset a so-called remanent marker depending on the execution of a predetermined work process. In the present embodiment, this means that the actuation of the operation "close DE-bar" causes both the setting of the remanent marker and the corresponding resetting of the marker (interval "A"). FIG. 1 shows the reference symbol “B”.
The set remanent marker, which limits the interval indicated by, together with the set of markers which limits the interval, indicated by reference symbol "A", is reset only depending on the execution of the operation step "open DE-bar". At this time, in FIG. 1, it can be seen that the remanent marker is set correctly when the printing plate is on the plate cylinder within the described operation process interval “B”. Correspondingly, this remanent marker is an indicator of this state and can be correspondingly indicated on the indicating device of the control console of the printing press.

[0023]

According to the invention, it is possible to replace each printing plate, avoiding the aforementioned disadvantages of the prior art, and in particular, to ensure that the replacement process, once started on the printing press, is repeated again after interruption. And can be newly executed from the beginning.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, showing each operation step performed in an automated printing plate changing step together with two markers.

[Explanation of symbols]

 A, B interval

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Thomas Möller Neuhof Heide Weg 6 Germany (72) Inventor Hubert Hofmann 7 Aschaffenburg Auraweg 7 Germany (56) References JP-A-4-85041 (JP, A) Special table Hei 7-500295 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B41F 27/12 B41F 33/00 B41F 33/04 B41F 33/08

Claims (6)

(57) [Claims] 1. A printing machine, for example, a control method of an automated printing plate exchange step in sheet-fed offset printing press, after the input of at least one operation command, a series of work
Business processes, i.e., the predetermined positioning of the plate cylinder position, the printing plate of the clamp / unclamp to lock / unlock, as well as the plate cylinder, twisting acting only Jo Tokoro angle value in a predetermined direction
Each operation step is performed, and after the elapse of the individual work processes, a method for the operating state of at least one state indicator portion, with respect to the state instructing unit which is in operation, the corresponding marker
Storing nonvolatile, after performing other subsequent work step, said stored Ma
The deactivated state and at least one activated state
The specified status command is activated by the status indicator.
Generating a signal to block the start,
End by deactivating the status indicator of the above . Wherein at least one, the state indication part which is in operation, No placement claim 1 Symbol for generating a signal that prevents the start of operation of the predetermined operation piece <br/> command at the selected printing press Method. 3. At least two, directly or indirectly successive working steps, the status indicator is activated / deactivated, wherein the status indicator is completely turned on by the printing plate. 3. The method according to claim 1 , wherein the method is activated for a period of time when it is not mounted on the plate cylinder. 4. The method according to claim 1, wherein the state indicator is activated / deactivated during at least two successive working steps, directly or indirectly. 3. A method according to claim 1 or 2 , wherein the method is activated for a period of time resting thereon. 5. The printing press is disposed a control unit, by the control unit, after the input of one operation command even without least, a series of work steps, i.e., the positioning of a predetermined plate cylinder position,
Clamp / unclamp to lock / unlock of the printing plate, and the plate cylinder, act only Jo Tokoro angle value in a predetermined direction
Each work process of torsion is performed.
At least one status indicator can be activated
An apparatus for carrying out the method as claimed in any one of up to claim 1-4 that, the control unit, at least one, non-volatile repeated writing
Has a write enable memory unit, said Memoriyuni
The status indicator activated by the
Markers can be stored and other subsequent
After the appropriate execution, the stored marker can be deleted again.
At least one operating state by the control unit.
The specified status is activated by the status indicator.
Generating a signal to block the start, said blocking signal
The, apparatus characterized by can and this <br/> be terminated by deactivation of the respective state indication unit. 6. The at least one activated state.
A predetermined operation frame of the selected printing press is
The device of claim 5, wherein the signal can be generated to prevent activation of the command .