EP1513756A1 - Device for detecting a running disturbance in a running web - Google Patents
Device for detecting a running disturbance in a running webInfo
- Publication number
- EP1513756A1 EP1513756A1 EP03760553A EP03760553A EP1513756A1 EP 1513756 A1 EP1513756 A1 EP 1513756A1 EP 03760553 A EP03760553 A EP 03760553A EP 03760553 A EP03760553 A EP 03760553A EP 1513756 A1 EP1513756 A1 EP 1513756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- material web
- web
- cylinder
- running
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
- B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
- B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/18—Web break detection
Definitions
- the invention relates to a device for detecting a running disorder in a running material web according to the preamble of claims 1, 2, 3 or 8.
- the pressure nip can be opened, whereby an increase in the pressure is interrupted. But it can also be cut through the paper web before the affected gap to interrupt a further inflow of paper. It is also possible to open the printing gap and interrupt the inflow of paper. However, it is important in all cases to quickly detect a paper web break in order to be able to carry out these measures before the occurrence of damage.
- Photoelectric sensors are used to detect the presence of a paper web.
- Photocells have the problem that they detect running disturbances quite late, since the break point must first pass the photocell in order to be registered as such become.
- rewinders in which a normally expiring web is retracted into the printing unit, while at the same time continue to tap paper.
- the paper web is wound double-layered. Since, on the other hand, the outgoing web is withdrawn, a light barrier arranged behind the printing unit still registers the existence of the paper web. This results in particularly long reaction times from the occurrence of the disturbance to the detection thereof.
- particularly large amounts of paper are wound on the rotary cylinder.
- rewind locks can not be used with freshly printed wet paper as they exert a squeeze pressure on the web, but this is to be avoided on wet paper.
- a fast detection of a running disorder can be achieved here only to a limited extent, that many sensors are used close together. This measure is offset by the high cost factor involved in using a large number of sensors.
- DE 195 06 456 A1 discloses a device for detecting a web break, in which by means of sensors during web break a surface of a plate is detected. From DE 44 35 337 A1 a device for sheet control is known in which in the absence of a bow, a corresponding drum deflects a signal, so that no reflection occurs.
- the invention has for its object to provide a device for detecting a running disturbance in a running web.
- a winding occurring after a running disturbance can be detected directly at the place of its occurrence, whereas known devices can detect running disturbances only indirectly as such.
- Running disturbances are thus recognized by the invention without delay. Because it can be responded to promptly thanks to the rapid recognition of a running disturbance, the machine damage occurring as a result of a running disturbance can be considerably reduced or even completely avoided. Repair costs, as well as the time required for a repair or the restoration of operational readiness of the web-processing machine time are reduced. A further cost reduction is achieved by saving sensors at several points of the web.
- the device has over known devices such. B. the device described in DE 38 22 497 A1 the difference that their sensor detects the position of the web quantitatively, both at trouble-free course of the web and in the case of a running disorder, while in DE 38 22 497 A1 as Sensors used capacitive switch in each case only at excessive approach of the material web to address them, so only a qualitative statement make it over whether the material web runs on a regular web path or deviating Materialbahnweg.
- the device has over the advantage described in the cited document that it requires only one sensor. In addition, simplifies the apparatus design, since the material web does not have to be threaded between two sensors.
- the configuration of the device can generally be any distance sensor, for example an ultrasonic sensor. However, it is preferable to use a triangulation sensor.
- a reflector arranged in the beam path is provided. Preference is given to a device in which the reflector is a material web leading cylinder.
- the surface of the cylinder has a structure modulating the scanning signal. Since the cylinder rotates due to the guidance of the material web, the structure is swept periodically by the scanning signal and thus has a modulating effect on the reflected scanning signal.
- the modulating structure has, for example, areas with different optical reflection properties such. B. different reflectivities.
- the modulating structure may be one or more reflective markings mounted on the cylinder surface.
- areas with highly light-absorbing properties can be located between the reflective markings.
- the surface of the cylinder can be provided completely or only partially or in places with the modulating structure.
- Such a structure causes a modulation of the intensity of the reflex in a light signal used as a scanning signal. In the event of a running fault, move the material web into the area between the sensor and the cylinder or even wrap it around it Cylinder, the modulating structure is obscured by the material web, the modulation of the reflex is disturbed and gives the sensor an indication of the running disturbance.
- any desired scanning signal can be used in the described alternative embodiments of the device.
- a light signal is used as a scanning signal.
- the senor has a transmitter for emitting a scanning signal and a receiver for registering the scanning signal after propagation on a beam path.
- the sampling signal may be any signal such.
- a reflector In the beam path of the scanning signal, a reflector may be provided.
- An embodiment in which the reflector is a cylinder guiding the material web is preferred.
- the senor is a distance sensor, such.
- a distance sensor such.
- the structure has recesses on the surface of the cylinder. This may be, for example, one or more trough-shaped depressions or elongated, channel-shaped depressions.
- the rangefinder measures a varying distance between itself and the cylinder due to the depressions located on the surface of the cylinder. Also in this case leads due to a running disturbance in the area between the cylinder and sensor penetrating or the cylinder winding material web to a change in the detected by the sensor scanning signal, as measured by the sensor distance between the sensor and the cylinder is no longer periodically changes The sensor recognizes the running disturbance
- the devices are used in printing machines
- the Matenalbahn passes through a nip between two cylinders By wrapping one of the cylinders at the exit of the nip, a course of the Matenalbahn on one of the looped cylinders facing side of the regular Matenalbahnwegs is ensured at a running disturbance
- an additional device for interrupting the Matenalbahn is available upon registration of a malfunction. Such a device prevents the flow of material, and the occurrence of damage due to the malfunction is prevented or at least the damage possibly caused by the fault limited
- FIG. 1 shows a preferred embodiment of the invention, in which a sensor
- FIG. 2 shows the device from FIG. 1, wherein the material web wraps around a cylinder at the gap outlet
- FIG. 3 shows a further preferred embodiment of the invention, with a sensor which emits a scanning signal, which is reflected at the surface of a cylinder at a position and at which there is no Matenalbahn at regular Matenalbahnweg,
- FIG. 4 shows an embodiment of the invention in an overprint printing with entwined Cylinder.
- FIG. 1 An embodiment of the invention is shown in Fig. 1 using the example of a rotary printing press. 1 shows in schematic form a cross section through a printing unit of the rotary printing machine.
- the printing unit consists of a cylinder 01, z. B. impression cylinder 01, a cylinder 02, z. B. transfer cylinder 02, a cylinder 03, z. B. form cylinder 03 and a guide element 04.
- Each of the cylinder 01; 02; 03 rotates in a sense of rotation, which is indicated by an arrow.
- the impression cylinder 01 and the transfer cylinder 02 are arranged so that there is a pressure gap between them.
- the forme cylinder 03 abuts on the transfer cylinder 02.
- the guide element 04 may for example be designed as a guide roller 04 or hedgehog roller or formed by the nip of a subsequent printing unit.
- an arrow indicates the running direction of the paper web 06.
- the paper web 06 runs between the pressure nip and the guide element 04 on a straight line.
- the instantaneous course of the paper web 06 may deviate slightly from the straightness due to irregularities in the course or fluctuations of the material web tension.
- a regular web path 13 of the paper web 06 which corresponds to an undisturbed functioning of the printing press, therefore, a volume must be assumed transverse to the straight line of finite extent.
- the boundaries of the regular material web path 13 are marked by dashed lines.
- On both sides of the regular material web path 13 is a zone 12, in which the paper web 06 may not occur in undisturbed functioning of the printing press.
- the material web tension may collapse. Then, the paper web 06 can adhere to the output of the printing gap on one of the cylinders 01 or 02, and a part of the paper web 06, which has already passed through the printing gap, can be withdrawn into the printing unit.
- the paper web 06 leaves the regular web path 13 and penetrates into the zone 12. In principle, the paper web 06 can leave the regular material web path 13 to the right and then takes, for example, the irregular material web path 08 or else it leaves the regular material web path 13 in the left direction and then runs z.
- a distance sensor 09 is provided.
- the distance sensor 09 measures a lateral distance of the paper web 06 from the regular material path 13 and provides a quantitative value for this distance. If the distance of the paper web 06 from the regular material path 13 is greater than a predetermined value, then the distance sensor 09 evaluates this as a running disturbance.
- a triangulation sensor is used as the rangefinder 09.
- the impression cylinder 01 is likewise a transfer cylinder as in the case of FIG Transfer cylinder 02.
- Analogous to the arrangement of the forme cylinder 03 with respect to the transfer cylinder 02 is in such an embodiment, the impression cylinder 01 associated with a form cylinder.
- both irregular web paths 07 and 08 lead to rewinders.
- the described device for detecting a running disturbance can also be used advantageously in such a device, since the distance sensor 09 is able to register a deviation of the paper web 06 from the regular material web path 13 both in the direction of the irregular web path 07 and the irregular web path 08 ,
- a particularly preferred embodiment of the device shown in FIG. 2 is a device in which the paper web 06 wraps around one of the two cylinders 01 or 02, at least in the gap outlet.
- a wrap ensures a predefined irregular material path 07 in case of a running disturbance; 08 of the paper web 06.
- the paper web 06 which wraps around the transfer cylinder 02 as shown in FIG. 2, occupy the irregular material web path 08 in the event of a running disturbance, while it would occupy the irregular material web path 07 in the case of an unraveling of the impression cylinder 01, not shown.
- the web path preselected by the looping is favored by an adhesive force of color between looped transfer cylinder 02 and paper web 06.
- Fig. 3 shows a Fig. 1 very similar printing unit of a rotary printing press. Also in this printing a counter-pressure cylinder 01, a transfer cylinder 02 and a forme cylinder 03 are provided. The counter-pressure cylinder 01 and the transfer cylinder 02 form a pressure nip through which the paper web 06 passes. At the exit of the printing nip, the paper web 06 runs on a regular web path 13. If there is a running disturbance of the paper web 06, such. B. a material web break, so the paper web strikes 06 due to the adhesive force of the ink on the side of the transfer cylinder 02 and takes the irregular material path 11 or it wraps around the transfer cylinder 02nd
- the sensor 09 comprises a transmitter for emitting a scanning signal and a receiver for registering a reflection of the scanning signal after propagation on a beam path 16 and is arranged so that the beam path 16 extends laterally from the regular material path 13 and the scanning signal on the surface of the cylinder 02 at a point is reflected on the train at regular material path 13 no paper web 06 is located.
- the scanning signal may be, for example, an ultrasonic signal.
- a light signal is used as a scanning signal.
- the sensor 09 can work according to different measuring principles. First, the case is considered that it is formed as a reflection light barrier 09. Such a sensor 09 detects a change in the scanning signal received by the transmitter when paper of the paper web 06 penetrates between it and the cylinder 02. This change is easily detectable if the reflection properties of the paper and the cylinder 02 differ greatly. To achieve this, the cylinder 02 z. B. be mirrored on its surface. It is also conceivable in this sensor type, as a reflector for the scanning signal not the cylinder 02 itself, but to use a stationary mounted near its surface body, so changes in the sensor 09 received scanning signal resulting from the rotation of the cylinder 02 upon rotation could avoid.
- resulting from the rotation of the cylinder 02 changes in the scanning signal are used specifically for detecting a fault.
- the related to the rotation of the cylinder 02 changes the Namely, the sampling signal has the same period as the rotation of the cylinder 02 itself. It is therefore sufficient for the disturbance detection to monitor the received sampling signal for the presence of a spectral component with this period.
- the surface of the cylinder 02 scanned by the signal is structured, e.g. B. in color or relief.
- a relief structure is preferably formed by depressions such as spaced-apart, axially oriented grooves. If this spectral component is missing in the scanning signal, the paper web 06 has penetrated between the sensor 09 and the cylinder 02, and there is a material web running disturbance.
- the sensor 09 is a distance sensor 09.
- a distance sensor 09 is an optical sensor 09, z. B. a triangulation sensor is preferred; However, the following explained functional principle works well with other sensor types such. B. a push button.
- the surface of the cylinder 02 has a relief structure as described above.
- the sensor 09 measures a periodically modulated by the relief structure distance to the cylinder 02. Occurs now due to a running disturbance paper in the side of the regular web path 13 located beam path 16 between the sensor 09 and the cylinder 02, so changes the modulation of the distance characteristic of the regular material path 13, and the Sensqr 09 detects the running disturbance.
- the senor 09 could also on the input side of the gap between the cylinders 01; 02 be arranged.
- the output side arrangement shown in Fig. 3 is preferred because it allows earlier winder detection.
- the paper web 06 can wrap around the transfer cylinder 02 advantageously to after a running disturbance the irregular web path 11, the paper web 06 occupies a certain Ensure side to the pressure nip.
- FIG. 4 A device with such a looping of the cylinder 02 is shown in Fig. 4 using the example of a perfecting, in which a paper web 06 is printed on both sides.
- the perfecting is through the cylinder 01; 02; 03; 14 formed.
- the cylinders 01, 02 form a pressure nip through which the paper web 06 is guided.
- the paper web 06 wraps around the cylinder 02 at the outlet of the pressure gap.
- the cylinder 03 is arranged adjacent to the cylinder 02, while the cylinder 14 bears against the cylinder 01.
- the cylinders 03 and 14 are provided as forme cylinders 03 and 14, in which printing stencils for the transfer of ink to the transfer cylinders 02 and 01 are mounted. From the transfer cylinders 01 and 02, the ink is applied to a corresponding side of the paper web 06.
- the transfer cylinders 01 and 02 act as impression cylinders for the respective other transfer cylinders 01 and 02.
- the paper web 06 After passing through the pressure gap between the cylinders 01 and 02, the paper web 06 normally runs on a regular material web path 13. In the event of a running disturbance of the paper web 06, in particular in the case of a material web break, the paper web 06 leaves the regular material web path 13. The wrapping of the cylinder 02 sets through the paper web 06, the direction in which the paper web 06 deviates from the regular web path 13. Since the sensor 09 on the same side of the regular material path 13 is like the looped cylinder 02, the paper web deviates 06 to its side, so that the sensor 09 can detect the running disturbance.
- a wrap of a cylinder 01; 02 by the paper web 06 of advantage, because it allows a course of the paper web 06 can be adjusted in a running disturbance on a preselected page after the printing nip.
- a sensor 09 detects a running disturbance
- the cylinders 01 and 02 can now be moved apart rapidly by a device for adjustment, in particular by changing the axial distance, and / or the paper web 06 can move in front of a point The interruption of the race or broken away to avoid damage to the printing press and the resulting forces are reduced.
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Controlling Sheets Or Webs (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Pulleys (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Advancing Webs (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10227694 | 2002-06-19 | ||
DE10227694A DE10227694A1 (en) | 2002-06-19 | 2002-06-19 | Device and method for detecting a running disturbance in a running material web |
PCT/DE2003/001841 WO2004000704A1 (en) | 2002-06-19 | 2003-06-04 | Device for detecting a running disturbance in a running web |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1513756A1 true EP1513756A1 (en) | 2005-03-16 |
EP1513756B1 EP1513756B1 (en) | 2008-03-26 |
Family
ID=29795839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03760553A Expired - Lifetime EP1513756B1 (en) | 2002-06-19 | 2003-06-04 | Device for detecting a running disturbance in a running web |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1513756B1 (en) |
AT (1) | ATE390376T1 (en) |
AU (1) | AU2003243916A1 (en) |
DE (2) | DE10227694A1 (en) |
WO (1) | WO2004000704A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60327890D1 (en) | 2002-12-11 | 2009-07-16 | Donaldson Co Inc | Z-FILTER MEDIA WITH AGGREGATE CLEANING SYSTEMS AND METHOD |
DE102006019761A1 (en) * | 2006-04-28 | 2007-10-31 | Koenig & Bauer Aktiengesellschaft | Sheet controlling device for use in sheet rotation printing machine, has reference surface arranged at radial distance of sheet web at sheet web transporting rotation body, where surface is curved corresponding to sheet web |
DE102008000522B4 (en) | 2008-03-05 | 2011-05-05 | Koenig & Bauer Aktiengesellschaft | Device for detecting a material web disturbed in its course |
DE102008000526A1 (en) | 2008-03-05 | 2009-09-17 | Koenig & Bauer Aktiengesellschaft | Printing machine e.g. rotary printing press, operating method, involves slowing down one of rotation bodies arranged along path of web till to idle condition, rapidly than that of other body using brake device regulated by controller |
ATE550188T1 (en) | 2008-03-05 | 2012-04-15 | Koenig & Bauer Ag | METHOD FOR OPERATING A PRINTING MACHINE HAVING SEVERAL PRINTING UNITS |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211455A (en) * | 1982-06-01 | 1983-12-08 | ハイデルベルガ− ドウリユツクマシ−ネン アクチエンゲゼルシヤフト | Preventive device for defective operation of rotary press |
DE3822497A1 (en) * | 1987-12-02 | 1989-10-19 | Kotterer Grafotec | DEVICE FOR PREVENTING MACHINE DAMAGE |
US4966074A (en) * | 1989-02-13 | 1990-10-30 | Aldrich Jr Wesley C | Web wrap detection system for an offset web printing press |
US5073714A (en) * | 1990-05-22 | 1991-12-17 | Union Camp Corporation | Method and apparatus for detecting amplitude and frequency of web flutter using infrared optical sensor |
DE4302189A1 (en) * | 1993-01-27 | 1994-07-28 | Roland Man Druckmasch | Electric traction mechanism |
DE9320409U1 (en) * | 1993-04-26 | 1994-06-23 | Albert-Frankenthal Ag, 67227 Frankenthal | Device for preventing printing unit damage in the event of web break |
DE4435337B4 (en) * | 1994-10-01 | 2005-12-15 | Koenig & Bauer Ag | Method and device for sheet control |
DE19506456C2 (en) * | 1995-02-24 | 1999-07-01 | Boewe Systec Ag | Control device for monitoring the running of two superimposed paper webs in a paper processing machine |
DE19645799A1 (en) * | 1996-11-07 | 1998-05-20 | Roland Man Druckmasch | Paper web catcher |
DE29802400U1 (en) * | 1998-02-12 | 1999-06-10 | Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld | Pair of rollers |
-
2002
- 2002-06-19 DE DE10227694A patent/DE10227694A1/en not_active Withdrawn
-
2003
- 2003-06-04 WO PCT/DE2003/001841 patent/WO2004000704A1/en active IP Right Grant
- 2003-06-04 AT AT03760553T patent/ATE390376T1/en not_active IP Right Cessation
- 2003-06-04 AU AU2003243916A patent/AU2003243916A1/en not_active Abandoned
- 2003-06-04 EP EP03760553A patent/EP1513756B1/en not_active Expired - Lifetime
- 2003-06-04 DE DE50309475T patent/DE50309475D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004000704A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10227694A1 (en) | 2004-01-29 |
DE50309475D1 (en) | 2008-05-08 |
WO2004000704A1 (en) | 2003-12-31 |
ATE390376T1 (en) | 2008-04-15 |
EP1513756B1 (en) | 2008-03-26 |
AU2003243916A1 (en) | 2004-01-06 |
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