EP1069062A2 - Device for monitoring the transport of flat signatures - Google Patents

Abstract

The invention relates to a method and a device for monitoring the transport of flat copies, for example into a folder (30), which is arranged downstream of a rotary printing press. According to a first method step, the presence or absence of specimen-detecting sensors (3, 4, 5, 6, 7, 8 or 9) is selected depending on the folding mode (28, 29). The number of copies that have entered the folder (30) is determined with the aid of sensors (2a, 14) before comparing (109) the number of copies that have entered the folder (30) with the number of copies in the folder (30). specimens detected by the sensors (3, 4, 5, 6, 7, 8 and 9) triggering or not triggering a machine stop (112).

Description

The invention relates to a device for monitoring the transport flat copies, for example in a folder from a material web severed and there to be folded longitudinally and / or transversely.

EP 0847 857 A1 relates to an adjustment device in front of a cylinder a traverse arranged in a rotary printing machine. There is one on the traverse Measuring device can be moved axially to the lateral surface of the cylinder by means of a holder. For precise, uncomplicated and automatable adjustment of the truss alignment with respect to the cylinder with interchangeable adjustment direction Bracket can be coupled with an optoelectric adjustment aid. The adjustment aid has a light beam on the cylinder projecting optical element and at least one optical receiver, which is a reflected from the cylinder Beam of light receives. The optical receiver comprises an optoelectronic one Sensor that is used in conjunction with evaluation electronics to record the Position of the reflected light beam on the sensor is suitable.

This device is primarily used to align the surface of the cylinder scanning optical measuring device.

EP 0753 409 relates to a sheet-fed printing machine with a delivery the top of which should be continuously fed sheets. In simple and not to interfere with stacking, with a traversing measuring device one attached to the leading edge of the sheets To scan pressure control strips. For this purpose, they can be moved on a traverse Measuring device associated with sheet retainers, which prevent the during the execution of a measuring process promoted sheet on the top of the stack.

With this device from the prior art, however, one of the specimens The travel distance traveled - for example by a folder - is not reliable can be detected.

US 3,815,895 discloses a paper jam detection system for folders, one of which Role rotation are subordinate. Within the folder on selected Locating photocells detect both absent and incorrectly also incorrectly existing copies along the conveyor path through the Folders. A timing control unit that works synchronously with the folder, generates signals that trigger a detection of whether one is on a particular The place where the expected copy actually exists is there and whether it is on a specific one Unexpected copy of the conveyor path at this point actually does not arrive. The signals from the photocells will match those the timing control unit logically linked, supplied to a logic circuit, the stops the folder if necessary. The system also detects when in the paper jam detection system one of the photocells has failed.

It has been found that not only at full operating speed Roll jams occurring in the folder drastic consequences and long Downtime can cause rotation, but that already during the Web feed or paper jams or paper misfeeds that occur when the rotation is creeping at least avoidable delays in ramping up the rotation can cause. During web threading or creeping the Very high torques can occur, mechanical adjustments of Grippers, cylinders or similar components in relation to each other can be undefined be while the printer's attention to others under one New establishment of an order may be directed to necessary work.

In view of the solutions outlined from the prior art and the recorded ones technical problem, the invention is based on the object To provide paper flow monitoring system, which at slow paper feed speeds responds to irregularities in specimen transport.

According to the invention, this object is achieved by the features of patent claim 1 solved.

The advantages that can be achieved with this solution are diverse. So you can using the method according to the invention folders integrate faster into the paper run when the upstream rotation creeps, because misdirected copies are immediately recognized in the folder and cause a shutdown of the folder drive. This provides effective protection mechanical folding components still undefined to each other represents the considerable at creep speed under the high torques occurring there could be damaged. The printer can both at slow speed attention during rotation as well as during the paper threading phase dedicate necessary presets, an impending paper jam or a faulty line is now automatically recognized.

In a further embodiment of the method on which the invention is based Sensors in the folder depending on the selected folding mode based on the copy progression validated along the funding path. The validation, i.e. one on electronic Declaration of validity of a sensor signal can be made at the sensors located at the beginning of the specimen conveying path after just a few copies entered in the folder after the sensor in question Can recognize the earliest at the earliest, depending on the preselected transport path set folding mode. Validation arranged earlier in the item transport path Sensors takes place after a lower number of copies that can be preset the validation of later sensors arranged in the specimen transport path corresponding to a larger number of copies entered in the folder the distance covered up to the validating sensor.

The limit values that enable validation are on the monitoring unit can be specified and stored there so that it is always up to date for the necessary calculations be available.

By validating the sensors corresponding to the selected folding mode along the conveying path of the copies associated with the folding mode is the Reliability of those transmitted from the sensors to the monitoring unit Signals guaranteed. Determining the number of copies in the Folding device has occurred, for example, is assigned to the cutting cylinder Revolution counter associated with the encoder or the drive motor of the folder. Depending on the selected section length, the individual in the Folders transported number of copies can be determined.

The difference is in the monitoring unit according to the present method of the number of copies detected per validated sensor and from the folder number of copies located is determined continuously, with a maximum permissible Difference can be specified on the monitoring unit. This can be dependent from the substrate parameters, copy thickness and empirical values to set the monitoring system according to the order.

In the sensors required to carry out the method according to the invention it is preferably sensor pairs consisting of a transmit and a Receiving part exist. These are spaced from each other, being between transmit and the receiving section of the specimen conveyor path. The cutting cylinder or the drive assigned to the folder can be used as a proximity switch or encoders such as rotary encoders, for example, are configured per revolution a pulse to the monitoring unit of the unit concerned submit, which is summed up there.

Folders can preferably be monitored by means of the solution according to the invention, which are subordinate to a roll rotation, the monitoring unit each according to the copy path required for the selected folding mode Validated sensors and the sensor signals validated in this way for the number who compares the copies with the one that entered the folder. Out this comparison made in real time can be a shutdown condition in the Folder and / or derived for the entire rotation.

The invention is explained in detail below with reference to a drawing:

Fig. 1

dem prinzipiellen Aufbau eines Falzapparates mit dem jeweiligen Exemplarförderpfades zugeordneten Sensorpaaren,

Fig. 2

einen dem Doppelparallelfalzmodus entsprechende Exemplarförderung durch den Falzapparat,

Fig. 3

ein dem zweiten Längsfalzmodus entsprechender Exemplartransport durch den Falzapparat mit sich aufteilendem Exemplarstrom und

Fig. 4

ein prinzipielles, vereinfacht wiedergegebenes Flußschaltbild, welches die Arbeitsweise der Steuereinheit verdeutlicht.

It shows:

Fig. 1

the basic structure of a folder with the sensor pairs assigned to the respective specimen conveying path,

Fig. 2

a copy conveyance by the folder corresponding to the double parallel folding mode,

Fig. 3

a copy transport corresponding to the second longitudinal folding mode through the folder with a dividing copy stream and

Fig. 4

a basic, simplified flow diagram, which illustrates the operation of the control unit.

In Fig. 1 is the basic structure of a folder with the respective copy paths assigned sensor pairs shown.

A material web 15, which can also be formed from several material web layers, occurs after passage of a turning bar superstructure, not shown here provided a first longitudinal fold in the folder 30. Your presence is marked by a Sensor pair 1 detected, which consists of a transmitting and a receiving part 1a, or 1b exists. The material web 15 transported in the conveyor plane 16 passes through Cutting cylinder pair 2b, 17, consisting of a cutting cylinder 2b and one with this cooperating slot cylinder 17. There the individual copies separated from the material web 15 by transverse cutting.

An encoder 2a can optionally be assigned to the cutting cylinder 2b, which per revolution of the cutting cylinder 2b to the monitoring unit 12 transmitted. For each revolution of the cutting cylinder 2b, exactly one copy of the leading end of the web of material 15 separated, whereby the number of in Folder 30 located copies is easy to determine. The number of in The folder entering the folder 30 can alternatively via a rotary encoder 14 are determined, the revolutions of the folder 30 driving Drive motor 13 detects what is also the number of in the folder has entered specimens determined. The values for the copies entering the folder are continuously determined and are stored in the monitoring unit 12.

The further promotion of the copies is now done by a folding knife cylinder 18 assigned sensor pair 3 monitors. Works with the folding knife cylinder 18 the folding dapper cylinder 19 together, working between them Cylinders 18, 19 of the first cross fold is formed on the copy. The jaw cylinder 19 are two further transport or gripper cylinders 20, or 21 assigned, which on the one hand form a further transverse fold in the copy and, on the other hand, the copies of the circumference of the jaw cylinder 19 alternate decrease and in this way cause a distribution of the copy flow.

An upper conveyor path 22 extends behind the upper transport cylinder 20, secured by a pair of sensors 4 to the upper second longitudinal folding device 10b. In an analogous manner to this, the lower transport cylinder 21 is a lower conveying path 23 assigned, also secured by a pair of sensors 5, via which the copies are fed to a further second longitudinal folding device 10a. The two second longitudinal folding devices 10a, 10b each contain a folding knife 27, which is not closer to the fold back on the copy by pushing in between here shown folding rollers. With the one located over the folding knife 27 Double circles are the drive of the folding knife 27 indicated in a simplified manner.

The upper second longitudinal fold module 10b is a paddle wheel configuration 24, 25 downstream, with both paddlewheels 24 and 25, respectively, the entry of the specimens by means of a pair of sensors 6 or 7 as well as leaving the specimens of the paddle wheel 26 can be monitored by means of sensor pairs 8 or 9. At the issue 11 the specimens laid out in shingled formation leave the folder 30 to a stacker or a packaging machine for further processing to become.

2 shows a copy conveyance corresponding to the double parallel folding mode through the folder.

The conveying path 28 indicates the transport path - shown here in greater line width to which the material web 15 through the cutting cylinder pair 2b, 17th Accept severed copies in double parallel fold mode. In this operating mode of the folder 30, the copies end by the cooperation Folding cylinders 18, 19 and 20 folded in parallel. The promotion the specimens take place along the upper conveyor path 22, the upper second Longitudinal folding device 10b is inactive and allows the cross-folded copies to pass through. These can then either in a lower paddle wheel 25 or an upper paddle wheel 24 are passed through which a scaled display of the specimens can be done. In this folding mode, according to a promotion of the copies of the conveying path 28, the sensor pairs 3, 4, 6, 7, 8, and 9 are in detection mode switched while the pair of sensors 5 on the lower conveyor path 23 such is to be switched that this has to detect the absence of specimens. Depending on selected delivery configuration for the copies in double parallel folding mode can one of the paddle wheels 24 or 25 or both paddle wheels the product output take. With a copy output via the upper paddle wheel 25 sensors 7 and 8 must be switched to detection mode - according to the corresponding Validation while sensor pairs 6 and 9 indicate the absence of specimens would have to be set.

The sensors 7, 8 in the paddle wheel module of the folder 30 are validated in such a way that that the earliest recognize a copy and send a valid signal, if one of the distances from the cutting cylinder pair 2b, 17 to the respective Sensor corresponding number of copies is located in the folder 30. this applies analog for sensors 6 and 9, provided there is also a product delivery via the lower one Paddle wheel 25 is provided.

The validation of sensors 3, 4, 7, 8 and possibly 6 and 9 is dependent from the copy progression of the copies through the folder 30, so that the Signals from the sensors are only considered valid when the respective Depending on the folding mode, detect a sensor at the earliest or not can.

3 shows a specimen conveying path corresponding to the second longitudinal fall mode shown, with the copy flow divided behind the jaw cylinder.

In this operating mode of the folder 30, the copy conveying paths with 29 are marked, the copies are folded once tapped alternately behind the jaw cylinder 19 by the cylinders 20, 21 and get in via the lower and the upper conveyor paths 22, 23 in the upper and the lower second longitudinal folding device 10a, 10b. There are the cross-folded copies with a second longitudinal fold and arrive in a display not shown.

In this operating mode of the folder 30, the paddle wheel module is inactive, the sensors provided there are accordingly inactive, i. e. on detection the absence of copies switched; on the other hand, they are the funding path 29 of the sensor pairs 3, 4 and 5 assigned to the specimens upon detection of the presence of the copies switched, but on the condition that a validity of the specimens detected by the sensor pairs 3, 4 and 5 only from the point in time can take place from which the respective sensor pairs 1, 3, 4 and 5 at the earliest one Recognize the copy according to the copy progression by the folder can.

In the configuration according to FIGS. 2 and 3, the number of folders 30 entering copies via encoder 2a or 14, the cutting cylinder 2b or are assigned to the drive 13 of the folder 30 can be determined as above already set out.

The operation of the integrated in the folder 30 according to Figures 1 to The monitoring unit 12 shown in FIG. 3 can best be seen from the flow chart explain according to FIG. 4.

With the start command 100, the monitoring unit 12 is initialized first carries out a self-test 101 and the printer activates it optically or also acoustically. According to the given The folder configuration is the set folding mode, for example double parallel folding 28 or second longitudinal fold mode 29 detected; this is done in step 102. depending on the selected folding mode 28 or 29, the sensor activation 103 those sensors 3, 4, 5, 6, 7, 8 or 9 activated on the selected folding mode 28 or 29 corresponding conveyance path of the copies through the folder 30 lie. These are stored in memory 104, which is an error detection routine 104.1 is assigned.

Are the relevant sensors from the number of sensors 3, 4, 5, 6, 7, 8 or 9 activated and stored, the number of copies is determined in the counter level 105 has entered the folder 30.

The following part of the diagram between counter level 105 and the validation routine 106 is performed separately for each sensor 3, 4, 5, 6, 7, 8, or 9 since each of these sensors by virtue of its different positions in the folder 30 has a different validation threshold. After exceeding the respective validation threshold, the point in time from which the selected sensor can detect an item at the earliest or can detect the missing item, the corresponding sensor signal only recognized as a valid sensor signal this is done by setting the sensors in 107.

Then, depending on the folding mode selected sensors, a comparison operation 108 between the number of copies in the folder 30 and the number of copies Sensor detected number of copies performed. Results in the in Real time comparison operation 109 performed no difference, again becomes the signal validity request 106 branches to check if the validation threshold was actually exceeded or not.

If the comparison 109 shows that more copies were counted on the respective sensor, than may have entered the folder is done by setting the Shutdown signal 110 a stop of the folder 30 and / or the rotation as one Malfunction of the encoder 2a or 14 could be present.

On the other hand, the comparison operation 109 yields a smaller number of by Sensors 3, 4, 5, 6, 7, 8 or 9 detected copies than in the folder 30 have occurred, it is first determined via a sensor validity query 111, whether this result came from a previously validated sensor. if it if the sensor is not valid, the device branches back to Validation request 106; however, the corresponding sensor was correctly validated, a paper jam 111.1 was detected, which was triggered by a shutdown command 112 in disengaging drive 13 of the folder 30 and / or the rotation brings about.

When the command 113 is reached, the monitoring unit 112 has the monitoring run through the controlling program.

After the surveillance system has been initialized, this indicates to the printer that it is is activated in creep speed or during the web retraction phase. The system can to monitor yourself, such as when a number of copies are found on a sensor that is larger than that actually entered the folder 30 Number of copies, the function monitoring of the encoder 2a or 14 is displayed becomes. The monitoring system can be used in any folder and is next to the specimen jam detection in slow speed or when entering the web also suitable for normal operating speeds and can be configured accordingly.

Reference list

1

Sensor pair

1a

Transmitting part

1b

Receiving part

2a

Revolution counter

2 B

Cutting cylinder

3rd

Sensor pair of folding cylinders

4th

Sensor pair upper conveyor path

5

Sensor pair lower conveyor path

6

Sensor pair 1st paddle wheel

7

Sensor pair 2nd paddle wheel

8th

Pair of sensors on top display

9

Lower delivery sensor pair

10a

lower second longitudinal folding device

10b

upper second longitudinal folding device

11

output

12th

Monitoring unit

13

drive

14

Revolution counter

15

Material web

16

Funding level

17th

Mut cylinder

18th

Folding knife cylinder

19th

Jaw cylinder

20th

Transport cylinder

22

upper funding path

23

lower conveyor path

24th

Paddle wheel

25th

Paddle wheel

26

Paddle wheel bags

27

Folding knife second longitudinal fold

28

Folder mode double parallel fold

29

Folder mode second longitudinal fold splintered

30th

Folder

100

begin

101

activation

102

Folder configuration detection

103

Sensor activation

104

Memory query

104.1

Memory error routine

105

Copy count

106

Signal validity query, validation

107

Sensor activation

108

Comparator

109

Defferentwertung

110

Shutdown triggering

111

Sensor validity query

111.1

Paper Jam

112

Shutdown command

113

The End

Claims (18)

Method for monitoring the transport of flat copies, in particular in a folder, which is arranged downstream of a rotary printing press, with the following method steps: the selection of sensors (3, 4, 5, 6, 7, 8 and 9) detecting the presence or absence of copies, depending on the folding mode (28, 29) of the folding apparatus 30, determining the number of copies which have entered the folder (30) by donors (2a, 14) and the comparison of the number of copies in the folder (30) with the number of copies detected by the selected sensors (3, 4, 5, 6, 7, 8 and 9). A method according to claim 1, characterized in that the sensors (3, 4, 5, 6, 7, 8 and 9) depending on the folding mode (28, 29) of the folder (30) based on the Copy progression along the funding paths can be validated. A method according to claim 2, characterized in that a validation on Beginning of the transport of the copies through the folder (30) Sensors (3, 4, 5) after a few copies fed into the folder (30) he follows. Method according to claim 2, characterized in that a validation further stream of remote sensors (6, 7, 8 and 9) along the conveyor path a large number in the folder (30) transported copies. A method according to claim 1, characterized in that by means of a Cylinder (2b) associated encoder (2a) the number of in the folder (30) transported specimens can be determined. A method according to claim 1, characterized in that by means of a Drive (13) of the folder (30) associated encoder (14) the number of in the folder (30) transported copies is determined. Method according to claims 5 or 6, characterized in that the determined Number of copies to a monitoring and evaluation unit (12) is transmitted. A method according to claim 1, characterized in that depending on the selected Folding mode (28, 29) of the folder (30) per sensor (3, 4, 5, 6, 7, 8 or 9) the ratio of the number of copies entered the folder (30) determined for the number of copies counted at the sensor position becomes. A method according to claim 1, characterized in that per sensor position the maximum allowable difference between the number of times in the folder (30) occurrences and those at the position of the sensor (3, 4, 5, 6, 7, 8 and 9) actual occurrences are determined. A method according to claim 3, characterized in that the validation of the respective sensors (3, 4, 5, 6, 7, 8 and 9) depending on reaching the minimum number conveyed copies at the respective position of the sensor (3, 4, 5, 6, 7, 8 and 9). A method according to claim 1, characterized in that the comparison (109) the theoretical number of copies with the actually detected per sensor position Number of copies is carried out in real time. Device for carrying out the method according to claim 1, characterized in that that the sensors (3, 4, 5, 6, 7, 8 and 9) are designed as sensor pairs, a transmitting and a receiving part 1a, 1b comprehensively. Apparatus according to claim 12, characterized in that the receiving and Transmitter parts of the sensors (3, 4, 5, 6, 7, 8 and 9) on both sides of the conveyor level (16) the material web (15) and the copies are arranged. Device according to claim 12, characterized in that the transmitter (2a) is designed as a proximity switch. Device according to claim 12, characterized in that the transmitter (14) on the drive (13) of the folder (30) is designed as a rotary encoder. Device according to claim 12, characterized in that the current Folding mode (28, 29) of the folder (30) by the position of the folding components cylinder (18, 19) leading to the paper to the monitoring unit (12) is transmitted. Folding apparatus for a rotary printing press, in which material webs (15) can be processed, the folder (30) being in at least two folding modes (28, 29) can be operated and can have its own drive (13), that means of a monitoring unit (12) depending on the selected Fold mode (28, 29) required copy conveying paths with these respectively assigned Sensors (3, 4, 5, 6, 7, 8 or 9) depending on the copy progression the folder (30) can be validated and with the number of in the folder (30) a device can be compared in copies. Rotary printing machine, in particular for processing material web (15) with a folder (30), the folder (30) in at least two folding modes (28, 29) can be operated and can therefore have its own drive (13) characterized in that by means of a monitoring unit (12) depending on the selected Folding mode (28, 29) required copy conveying paths with these in each case assigned sensors (3, 4, 5, 6, 7, 8, or 9) depending on the copy progression can be validated by the folder (30) and with the number of in the Folder (30) a device can be compared in copies.

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