EP0552856A1 - Vorrichtung zum Reinigen von Zylindern oder Rollen in Druckmaschinen - Google Patents

Vorrichtung zum Reinigen von Zylindern oder Rollen in Druckmaschinen Download PDF

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Publication number
EP0552856A1
EP0552856A1 EP93250026A EP93250026A EP0552856A1 EP 0552856 A1 EP0552856 A1 EP 0552856A1 EP 93250026 A EP93250026 A EP 93250026A EP 93250026 A EP93250026 A EP 93250026A EP 0552856 A1 EP0552856 A1 EP 0552856A1
Authority
EP
European Patent Office
Prior art keywords
cleaning cloth
roller
printing
cleaning
printing cylinder
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.)
Withdrawn
Application number
EP93250026A
Other languages
English (en)
French (fr)
Inventor
Toshihiko c/o Toride Plant Ebina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komori Corp
Original Assignee
Komori Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Komori Corp filed Critical Komori Corp
Publication of EP0552856A1 publication Critical patent/EP0552856A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices

Definitions

  • the present invention relates to a printing cylinder/roller cleaning apparatus in various types of printing presses, which cleans the circumferential surface of a printing cylinder, e.g., a blanket cylinder, an impression cylinder, or a transfer cylinder, and the circumferential surface of a roller, e.g., a form roller or a vibrating roller.
  • a printing cylinder e.g., a blanket cylinder, an impression cylinder, or a transfer cylinder
  • a roller e.g., a form roller or a vibrating roller.
  • Each of various types of printing presses e.g., an offset printing press and an intaglio printing press
  • printing cylinders e.g., a plate cylinder, a blanket cylinder, an impression cylinder, and a transfer cylinder
  • rollers e.g., a form roller and a vibrating roller.
  • a cleaning apparatus is provided for cleaning the printing cylinders and rollers to remove the foreign matters.
  • a printing cylinder/roller cleaning apparatus of this type has rewinding and take-up shafts for a cleaning cloth, e.g., an unwoven fabric.
  • the two end portions of each of the rewinding and take-up shafts are rotatably supported by the bearings of the apparatus frame.
  • the rewinding and take-up shafts move close to the circumferential surface of the blanket cylinder and extend in the axial direction thereof.
  • the cleaning cloth e.g., an unwoven fabric taken up by the rewinding shaft in a separate process travels as it is intermittently rewound and taken up by the take-up shaft.
  • the traveling cleaning cloth is pressed by the pad against the circumferential surface of the blanket cylinder between the rewinding and take-up shafts.
  • the foreign matters attaching to the circumferential surface of the blanket cylinder are transferred to the cleaning cloth and removed together with the cleaning cloth, and the cleaning cloth is taken up by the take-up shaft.
  • a cutter is provided in the vicinity of the traveling path of the cleaning cloth to be almost perpendicular to the traveling direction of the cleaning cloth.
  • a tension is applied between the rewinding shaft and the blanket cylinder to cut the cleaning cloth with the cutter, thereby preventing occurrence of an accident.
  • no cutter is provided, but the abnormal tension of the cleaning cloth is detected only by a limit switch, and the printing press is stopped, thereby preventing occurrence of an accident.
  • the tension of the cleaning cloth is utilized in either the case wherein the cleaning cloth is to be cut by the cutter, the case wherein the cleaning cloth is cut by the cutter and the pivotal movement of the cutter is detected by the limit switch, or the case wherein no cutter is provided and the abnormal tension of the cleaning cloth is detected by the limit switch, and the like. Therefore, some time, even though only little, is required before cutting or detecting, and the loss of the cleaning cloth is inevitable.
  • the cleaning cloth is cut by the cutter and the pivotal movement of the cutter is not detected by the limit switch, the operator does not notice that the cleaning cloth is cut but notices it only after he or she observes the blanket cylinder. Then, in a multicolor printing press, after all the printing units are cleaned, the blanket cylinder of the printing unit that caused the accident must be cleaned again. This prolongs the preparation time and degrades the operability of the printing press.
  • the cleaning apparatus in which the pivotal movement of the cutter is detected by the limit switch after the cleaning cloth is cut by the cutter, as described above, the number of constituent components is increased, and an inexpensive cleaning apparatus cannot be provided.
  • a printing cylinder/roller cleaning apparatus for a printing press comprising a belt-like cleaning cloth, kept in a taut traveling state, pressed against a circumferential surface of a rotating printing cylinder/roller, for cleaning the circumferential surface of the printing cylinder/roller, and a detector, including a detecting member to be pressed against the cleaning cloth kept in the taut traveling state, for detecting loosening of the cleaning cloth on the basis of a movement of the detecting member.
  • Figs. 1 and 2 show a printing cylinder/roller cleaning apparatus according to the present invention which is applied to clean a blanket cylinder as a printing cylinder.
  • Fig. 1 shows a state wherein the cleaning cloth is taut
  • Fig. 2 shows a state wherein the cleaning cloth is loosened.
  • a hollow rewinding (supply) shaft 2 and a take-up shaft 3 are disposed in the vicinity of a blanket cylinder 1.
  • the rewinding and take-up shafts 2 and 3 extend in the axial direction of the blanket cylinder 1, and each of them has two end portions rotatably and detachably supported by the support portions of the apparatus frame (not shown).
  • a pair of guide rollers 4 and 5 each having two ends rotatably, axially supported by the bearings of the apparatus frame are pressed against the circumferential surface of the blanket cylinder 1 through a cleaning cloth 6.
  • the belt-like cleaning cloth 6 constituted by, e.g., an unwoven fabric is fully wound on the rewinding shaft 2 in a separate process, and the rewinding shaft 2 is mounted on the apparatus frame.
  • the cleaning cloth 6 wound on the rewinding shaft 2 is guided to the guide roller 4 and then to the take-up shaft 3 through the guide roller 5.
  • the take-up shaft 3, which is initially mounted on the apparatus frame in an empty state, is intermittently rotated as it is driven by a driving unit (not shown), so that it takes up the cleaning cloth 6 guided from the guide roller 5.
  • An L-shaped lever 8 serving as a detecting member is supported on a support pin 7, which is located in the vicinity of one end of the take-up shaft 3 and extends on the apparatus frame, to be swingable about its boss portion 8a.
  • the lever 8 has, on its one free end portion, a bent piece 8b bent parallel to the axial direction of the blanket cylinder 1.
  • the bent piece 8b is in contact with the rear surface of the cleaning cloth 6 traveling between the guide roller 5 and the take-up shaft 3 in the taut state.
  • a tension spring 11 extends between a spring catch 9 provided on the boss portion 8a of the lever 8 and a spring catch 10 extending on the apparatus frame. The tension spring 11 applies a pivotal force to the lever 8 in a direction (clockwise direction in Fig. 1) to press the bent piece 8b of the lever 8 against the rear surface of the cleaning cloth 6.
  • a normally open limit switch 12 connected to a controller 13 through a wiring 14 and having a contact 12a which is open in the normal state, is fixed to the apparatus frame such that its contact opposes the other free end portion 8c of the lever 8.
  • the lever 8, the tension spring 11, and the limit switch 12 constitute a detector 15.
  • the contact 12a of the limit switch 12 partly constituting the detector 15 is closed by the swing movement of the lever 8 when the cleaning cloth 6 is loosened, as shown in Fig. 2. Then, the controller 13 performs a control operation to stop rotation of the printing press.
  • the cleaning operation by the printing cylinder/roller cleaning apparatus having the arrangement as described above will be described.
  • the blanket cylinder 1 is rotated in a direction indicated by an arrow A in Fig. 1, and the take-up shaft 3 is intermittently pivoted to cause the cleaning cloth 6 to travel intermittently.
  • the foreign matters, e.g. ink dust and paper dust attaching to the surface of the blanket cylinder 1 are transferred to the cleaning cloth 6 to be removed with it.
  • the cleaning cloth 6 is then taken up by the take-up shaft 3 with the foreign matters attaching to it.
  • the empty rewinding shaft 2 is replaced with a rewinding shaft on which a cleaning cloth is fully wound in a separate process.
  • the take-up shaft 3 on which the soiled cleaning cloth 6 is wound is replaced with an empty take-up shaft.
  • the cleaning cloth 6 is kept taut, and the bent piece 8b of the lever 8 is urged by the cleaning cloth 6 against the tension of the tension spring 11, as shown in Fig. 1.
  • the cleaning cloth 6 is torn by some cause, or adhesively attaches to the circumferential surface of the blanket cylinder 1 by the viscosity of the ink, it tends to be caught in the blanket cylinder 1.
  • the lever 8, together with the bent piece 8b is pivoted by the tension of the tension spring 11 in the clockwise direction in Fig. 2.
  • the free end portion 8c of the lever 8 urges the contact 12a of the limit switch 12 to close the circuit.
  • the controller 13 stops rotation of the printing press, thereby preventing an accident in which the cleaning cloth 6 is caught in the blanket cylinder 1.
  • the time period after the cleaning cloth 6 is torn and before rotation of the printing press is stopped is very short.
  • the entire detector 15 is provided on the rear side of the cleaning cloth 6, and the contact 12a of the limit switch 12 is provided as a normally open contact, so that the contact 12a is closed when an abnormality occurs.
  • the contact 12a of the limit switch 12 may be provided as a normally closed contact, so that the contact 12a is open in an abnormal state. Even if the entire detector 15 is provided on the front surface side of the cleaning cloth 6, a normally open limit switch can be used by changing the position of the limit switch 12.
  • the contact 12a of the limit switch 12 is opened/closed by the free end portion 8c of the lever 8.
  • a projection or recess hole may be formed in the boss portion 8a of the lever 8, and the contact 12a of the limit switch 12 may be opened/closed by the projection or recess hole.
  • an actuator may be provided to the limit switch 12 such that its free end portion directly contacts the cleaning cloth 6, thereby detecting the loose state of the cleaning cloth 6.
  • This embodiment exemplifies a case in which the present invention is applied to the blanket cylinder as a printing cylinder.
  • the present invention can similarly be applied to an impression cylinder, a transfer cylinder, a paper discharge cylinder, and the like which are printing cylinders other than the blanket cylinder so as to obtain the same effect.
  • the cleaning cloth 6 is pressed against the circumferential surface of the blanket cylinder or the like by the guide rollers 4 and 5.
  • the cleaning cloth may be pressed against the circumferential surface of the blanket cylinder or the like by a pad, as is disclosed in Japanese Patent Laid-Open No. 63-286350 described above.
  • a detector is provided to detect the loose state of the cleaning cloth by pressing a detecting member against the traveling cleaning cloth. Therefore, the time period after the detecting member detects the loose state of the cleaning cloth and before rotation of the printing press is stopped can be greatly shortened, catching of the cleaning cloth in the printing cylinder or roller can be prevented to prevent occurrence of an accident, thereby improving the safety, and the consumption of the cleaning cloth can be decreased.
  • the structure is simplified, and the apparatus can be provided at a low cost.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP93250026A 1992-01-22 1993-01-21 Vorrichtung zum Reinigen von Zylindern oder Rollen in Druckmaschinen Withdrawn EP0552856A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP627392U JPH0558286U (ja) 1992-01-22 1992-01-22 印刷機の印刷胴・ローラ洗浄装置
JP6273/92U 1992-01-22

Publications (1)

Publication Number Publication Date
EP0552856A1 true EP0552856A1 (de) 1993-07-28

Family

ID=11633810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93250026A Withdrawn EP0552856A1 (de) 1992-01-22 1993-01-21 Vorrichtung zum Reinigen von Zylindern oder Rollen in Druckmaschinen

Country Status (2)

Country Link
EP (1) EP0552856A1 (de)
JP (1) JPH0558286U (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989434A (en) * 1997-10-31 1999-11-23 3M Innovative Properties Company Method for removing metal ions from solution with titanate sorbents
EP1167037A2 (de) * 2000-06-22 2002-01-02 Komori Corporation Reinigungsvorrichtung und Verfahren zur Feststellung des Fangens eines Reinigungtuches in demselben
US6616084B1 (en) * 1999-09-29 2003-09-09 Heidelberger Druckmaschinen Ag Winding method and device for machines for processing printing materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2894711B1 (fr) * 2005-12-09 2009-04-10 Cogema Dispositif et procede de decontamination automatisee d'un crayon de combustible nucleaire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE71387C (de) * P. LUHN in Leipzig, Johannisplatz 13 Einrichtung zum Anzeigen des Reifsens von bogenführenden Bändern und dergl
US1776104A (en) * 1929-07-12 1930-09-16 Thomas P Cavanaugh Web-controlling device for printing presses
EP0291745A2 (de) * 1987-05-19 1988-11-23 Baldwin-Japan Ltd. Apparat zum Reinigen eines Druckzylinders

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE71387C (de) * P. LUHN in Leipzig, Johannisplatz 13 Einrichtung zum Anzeigen des Reifsens von bogenführenden Bändern und dergl
US1776104A (en) * 1929-07-12 1930-09-16 Thomas P Cavanaugh Web-controlling device for printing presses
EP0291745A2 (de) * 1987-05-19 1988-11-23 Baldwin-Japan Ltd. Apparat zum Reinigen eines Druckzylinders

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989434A (en) * 1997-10-31 1999-11-23 3M Innovative Properties Company Method for removing metal ions from solution with titanate sorbents
US6616084B1 (en) * 1999-09-29 2003-09-09 Heidelberger Druckmaschinen Ag Winding method and device for machines for processing printing materials
EP1167037A2 (de) * 2000-06-22 2002-01-02 Komori Corporation Reinigungsvorrichtung und Verfahren zur Feststellung des Fangens eines Reinigungtuches in demselben
EP1167037A3 (de) * 2000-06-22 2002-05-22 Komori Corporation Reinigungsvorrichtung und Verfahren zur Feststellung des Fangens eines Reinigungtuches in demselben
US6626107B2 (en) 2000-06-22 2003-09-30 Komori Corporation Cleaning apparatus and method of detecting catching of cleaning web in the same

Also Published As

Publication number Publication date
JPH0558286U (ja) 1993-08-03

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