EP1010526A1 - Cylindre intermédiaire pour une presse à feuilles - Google Patents

Cylindre intermédiaire pour une presse à feuilles Download PDF

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Publication number
EP1010526A1
EP1010526A1 EP99305254A EP99305254A EP1010526A1 EP 1010526 A1 EP1010526 A1 EP 1010526A1 EP 99305254 A EP99305254 A EP 99305254A EP 99305254 A EP99305254 A EP 99305254A EP 1010526 A1 EP1010526 A1 EP 1010526A1
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EP
European Patent Office
Prior art keywords
sheet
intermediate cylinder
guide plate
guide plates
guide
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Withdrawn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
EP99305254A
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German (de)
English (en)
Inventor
Toshio Miwa
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP1010526A1 publication Critical patent/EP1010526A1/fr
Withdrawn legal-status Critical Current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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles

Definitions

  • the present invention relates to an intermediate cylinder for transferring sheets, which is provided on a sheet-feed press.
  • a typical sheet-feed press has a sheet feeding section 1, a plurality of sets of printing sections 2a to 2d, a sheet discharging section 3, and the like as principal elements as shown in Fig. 12 of the accompanying drawings.
  • sheets 4 stacked on a table in the sheet feeding section 1 are separated one from the other from the uppermost layer.
  • the separated sheet is transferred to a feeding cylinder 6, and further sent to between a blanket cylinder 7a and an impression cylinder 8a in a first-stage printing section 2a, by which first color printing is performed.
  • the sheet 4 for which first color printing has been completed is sent out from between the blanket cylinder 7a and the impression cylinder 8a and transferred to an intermediate cylinder 9. Then, the sheet is sent from this intermediate cylinder 9 to between a blanket cylinder 7b and an impression cylinder 8b in a printing section 2b of the next stage, by which second color printing is performed.
  • the sheet 4 which is sent out from between a blanket cylinder 7d and an impression cylinder 8d in the printing section 2d at the final stage, is transferred to a chain conveyor 10 for sheet discharge to be sent to the sheet discharging section 3, and is stacked in succession on a table in a sheet stacking section 11.
  • the sheet 4 on which printing is performed by using the sheet-feed press is made of either of two materials: One material is paper, and the other is metal sheet or synthetic resin.
  • the sheets made of paper include thin paper with a thickness of about 0.04 mm and thick paper with a thickness of about 1.0 mm.
  • a sheet made of thin paper has low rigidity. Therefore, for example, when the paper is sent from one printing section 2 to the printing section 2 at the next stage, fluttering occurs at the trailing edge of sheet.
  • the trailing edge thereof is separated from the impression cylinder 8 by a centrifugal force caused by the rotation transfer and a restoring force for the bend of the sheet itself, and the sheet collides heavily with a sheet guide 12 provided under the intermediate cylinder 9. That is to say, there is a tendency for paper jerking to occur.
  • a skeleton type intermediate cylinder 9-A shown in FIG. 13 and a cylindrical type intermediate cylinder 9-B shown in FIG. 14, which have been known as a typical example of the intermediate cylinder 9, are used appropriately according to the property of sheet used frequently.
  • the skeleton type intermediate cylinder 9-A shown in FIG. 13 is mainly used for a sheet 4 made of thick sheet.
  • This skeleton type intermediate cylinder 9-A has a publicly known bearer (not shown) at each end in the axial direction, and gripper pads 14 and a plurality of sets of grippers 15 are disposed between these bearers.
  • the gripper pad 14 and the gripper 15 constitute a sheet gripping portion 16.
  • the bearers are connected to each other by a cylinder body 18 rotating around a shaft 17.
  • This skeleton type intermediate cylinder 9-A has a feature in that the contact of a printed surface of the sheet 4 is made as small as possible.
  • the sheet 4 transferred by rotation can be bent from point P close to the gripper 15. That is to say, by increasing the distance from operation point P to the trailing edge of the sheet 4, the function of reducing the return reaction force of the sheet 4 is improved.
  • this intermediate cylinder 9-A the aforesaid paper jerking, in which the trailing edge of the sheet 4 comes impulsively into contact with the sheet guide provided under the intermediate cylinder, can be reduced. Consequently, flaws and folds of the sheet 4 are decreased.
  • the cylindrical type intermediate cylinder 9-B shown in FIG. 14 is mainly used for a sheet 4 made of thin sheet.
  • the intermediate cylinder 9-B of this type consists of a roll rotating around the shaft 17, and a plurality of sets of the grippers 15 opposed on the opposite sides of the shaft 17 are disposed in parallel in the lengthwise direction of the shaft 17.
  • This cylindrical type intermediate cylinder 9-B has a feature in that the area for supporting the sheet 4 is increased.
  • the sheet 4 transferred by rotation is guided along the outer peripheral surface of the cylinder body 18 by the downstream side of the gripper 15. Therefore, the function of reducing fluttering of trailing edge of the sheet 4 is increased. Consequently, troubles such as wrinkles produced at the trailing edge of sheet and overlapping and damage caused by the fluttering of paper are decreased.
  • the sheet On a multi-color press, the sheet is supplied successively to the plurality of sets of printing sections 2 where different ink color is used, so that the transfer of sheet between the adjacent printing sections requires stability.
  • both of the aforementioned skeleton type intermediate cylinder 9-A and the cylindrical type intermediate cylinder 9-B, which are used as a general intermediate cylinder, are not ideal as a means for transferring a sheet 4 ranging from thin paper sheet to thick paper sheet reliably without any trouble. Therefore, when the specifications of the sheet 4 do not comply with the type of the intermediate cylinder, unstable sheet transfer produces troubles such as flaws, contamination, and folds of paper edge.
  • This intermediate cylinder 9-C is based on the publicly known skeleton type. Specifically, the intermediate cylinder 9-C is configured so that two shafts 20a and 20b parallel to the shaft 17 are rotatably provided between a pair of bearers (not shown) fixed to both ends in the axial direction of the cylinder body 19, and the base end of a respective arcuate cover 21a, 21b is connected to each of the shafts 20a, 20b.
  • the shafts 20a and 20b are provided on the downstream side in the direction of rotation of the intermediate cylinder 9-C in such a manner as to be close to the sheet gripping portion 16, and are positioned symmetrically with respect to the shaft 17.
  • the arcuate covers 21a,21b are bent so as to have a radius of curvature R (see FIG. 16) substantially corresponding to the radius of movement path of sheet gripping point P1 at the sheet gripping portion 16.
  • the sheet 4 can be conveyed while being supported on the surfaces of the arcuate covers 20a and 20b, so that fluttering of the sheet produced at the time of printing of thin paper sheet can be decreased.
  • the intermediate cylinder 9-C of this type can be used for both thick paper sheet and thin paper sheet.
  • this intermediate cylinder 9-C which is configured so that one arcuate cover 21a, 21b positioned at each side is operated so as to be spread and stored, has the following problems:
  • the above-described intermediate cylinder 9-C has both the function as the skeleton type intermediate cylinder used for thick paper sheets and the function as the cylindrical type intermediate cylinder used for thin paper sheets, but it cannot be said that either function is sufficiently satisfactory. Therefore, there has been a strong demand for a versatile intermediate cylinder which can stably transfer sheets ranging from thin paper sheet to thick paper sheet.
  • the present invention has been made in view of the above situation, and accordingly an object thereof is to provide an intermediate cylinder for a sheet-feed press, which can transfer a sheet stably regardless of the rigidity of sheet.
  • an intermediate cylinder for a sheet-feed press in which a plurality of sheet gripping portions are provided on a circumference, and guide elements constituting a cylinder portion for supporting a sheet are interposed between the sheet gripping portions, wherein each guide element is made up of a pair of guide plates having a shape which divides an arc connecting the sheet gripping portions into two, and the base portions, of the guide plates are supported near the sheet gripping portions so as to be capable of swinging, and further, there is provided guide plate driving means for swinging the guide plates toward the center of the circumference to provide a function as a skeleton type intermediate cylinder and for swinging the guide plates in the direction such that the guide plates go away from the center of the circumference to provide a function as a cylindrical type intermediate cylinder.
  • the guide plate driving means has a drive element provided individually for each of the guide plates.
  • the drive element in the second mode of the invention, has a spring for urging the corresponding guide plate to one direction and an actuator for urging the same to the other direction.
  • the guide plate driving means has a drive element for applying a swinging force to one guide plate of the guide plates and a power transmission element for moving the other guide plate following the one guide plate.
  • the drive element has power converting means for converting the rotational power of a rotation actuator and the actuator into the swinging force and a link in which the power transmission element transmits the motion of the one guide plate to the other guide plate.
  • a stopper member for regulating the swinging position of each of the guide plates on the side of the center of the circumference, so that the inside surface of one guide plate coming into contact with the stopper member is formed so as to be capable of being brought into close contact with the contact surface of the stopper member, and the inside surface of the other guide plate is formed so as to be capable of being brought into close contact with the outside surface of the one guide plate in contact with the stopper member.
  • the swinging end portion of each of the guide plate is formed into a comb tooth shape to avoid interference between the swinging end portions of the guide plates.
  • a stopper member for regulating the swinging position of each of the guide plates on the side of the center of the circumference, so that the inside surface of the guide plate is formed so as to be capable of being brought into close contact with the surface of the stopper member.
  • the guide plates when the guide plates are swung to the center side to set the intermediate cylinder as a skeleton type intermediate cylinder, a space formed between the surface of the guide plate and the rotation path of sheet holding portion at the sheet gripping portion 16 can be made large. Therefore, at the time of printing of a thick paper sheet, an impact caused by the upward movement of the trailing edge of the sheet transferred to an impression cylinder is avoided fully, so that damage to paper surface can be prevented.
  • a guide surface for sheet can be formed over the substantially whole region in the circumferential direction except the sheet gripping portion. Therefore, at the time of printing of a thin paper sheet, the whole paper range of the sheet transferred to the impression cylinder can be supported by the guide surface. Thereby, the fluttering of the trailing edge of sheet is eliminated, so that the occurrence of printing troubles such as wrinkles, flaws, and overlapping can be prevented.
  • the skeleton type intermediate cylinder and the cylindrical type intermediate cylinder can easily be changed over. Therefore, even when sheets of various rigidities such as thick paper sheets and thin paper sheets are used in printing, a problem of the occurrence of damage, contamination, etc. on the printed surface is eliminated, so that high-quality printed matters can be manufactured.
  • FIGS. 1 and 2 show an intermediate cylinder 9-1 for a sheet-feed press in accordance with the present invention.
  • This intermediate cylinder 9-1 is based on the configuration of a publicly known skeleton type intermediate cylinder without a cylindrical cylinder.
  • the intermediate cylinder 9-1 has a bearer 30 at each end in the axial direction thereof, and four shafts 31a to 31d are provided between the bearers 30.
  • the shafts 31a to 31d are rotatably mounted at positions close to sheet gripping portions 16 consisting of a gripper pad 14 and a gripper 15 in such a manner as to lie parallel to a shaft 17.
  • the intermediate cylinder of this example has the function of a double-size intermediate cylinder in which the shape of cylinder changes.
  • the base ends of the arcuate guide plates 32a to 32d are fixed to the shafts 31a to 31d, respectively.
  • the arcuate guide plates 32a to 32d are bent so as to have a radius of curvature R substantially corresponding to the radius of movement path (circumference) of the sheet gripping points at the sheet gripping portions 16. That is to say, the guide plates 32a to 32d have a shape such that a cylinder with a radius R is divided in the circumferential direction.
  • the arcuate guide plates 32a to 32d are provided with ribs 33 for increasing the rigidity thereof, and are coupled to the shafts 31a to 31d via the ribs 33.
  • the intermediate cylinder 9-1 constructed as described above, by swinging the guide plates 32a to 32d around the shafts 31a to 31d, a state in which the guide plates 32a to 32d are stored towards the axis as shown in FIG. 1 and a state in which the guide plates 32a to 32d are spread out in the radial direction as shown in FIG. 2 can be set.
  • the guide plates 32a to 32d form a cylindrical body.
  • the total outer peripheral length of the guide plate 32 ranging from the shaft 31a to the shaft 31b or ranging from the shaft 31c to the shaft 31d becomes shorter than that when spread out as a result of the construction.
  • the operation is performed so that one guide plate, for example, the guide plate 32b is swung before the guide plate 32a is stored, and the guide plate 32d is swung before the guide plate 32c is stored.
  • the storage positions of the guide plates 32a to 32d are regulated by an internal cylinder portion 19a of a cylinder body 19 functioning as a stopper member. Therefore, the inside surfaces of the guide plates 32b, 32d are formed so as to be brought into close contact with an arcuate contact surface of the internal cylinder portion 19a, and the inside surfaces of the guide plates 32a, 32c are formed so as to be brought into close contact with the arcuate outside surfaces of the guide plates 32b, 32d which are in contact with the cylinder portion 19a, by which the guide plates 32a to 32d are positioned closer to the side of the cylinder body 19.
  • FIG. 5, FIG. 6, and FIG. 7, which is an enlarged view taken in the direction of arrow B of FIG. 5, typically show a driving mechanism for the guide plates 32.
  • a respective ratchet 34 and an arm 35 are fixed to the end portion of each shaft 31, and the tensile force of an extension spring 36 is applied to one end of the arm 35.
  • a claw member 38 is supported on the bearer 30 via a shaft 37 to act on the ratchet 34.
  • the other guide plates 32b to 32d are also swung in the same manner, by which the guide plates 32a to 32d are spread into a cylindrical form.
  • air cylinders 41a to 41d are disposed on the outer peripheral sides of the guide plates 32a to 32d, respectively.
  • the guide plate 32 is swung toward the axis of the shaft 17 and stored as shown in FIG. 1.
  • the air cylinders 40 and 41 are supported by a frame 39. Also, the air cylinders 40 and 41 are supplied with driving air from an air supply device 42.
  • the intermediate cylinder 9-1 of this embodiment is based on the skeleton type intermediate cylinder as shown in FIG. 13. Specifically, the shafts 31a to 31d are provided between the bearers 30, and the guide plates 32a to 32d are supported by the shafts 31a to 31d so as to swing.
  • the guide plates 32a to 32d can be spread out in the radial direction of the intermediate cylinder 9-1 or can be stored against the side of the shaft 17 of the intermediate cylinder 9-1.
  • the skeleton type intermediate cylinder described in item (1) and the cylindrical type intermediate cylinder described in item (2) can easily be changed over. Therefore, even when sheets of various rigidities such as thick paper sheets and thin paper sheets are used in printing, the prior problem of the occurrence of damage, contamination, etc. on the printed surface is eliminated, so that high-quality printed matters can be manufactured.
  • the tip end portions of the guide plates 32a, 32b (32c, 32d) are formed straight as shown in FIG. 3, it can be formed into a comb tooth shape as shown in FIG. 8.
  • the comb teeth of the guide plate 32a (32c) and those of the guide plate 32b (32d) are formed so as to be alternate.
  • both of the guide plates 32a and 32b (32c and 32d) are brought into contact with the cylinder body 19 by providing the comb teeth as described above, both of the inside surfaces of the tip end portions of the guide plates 32a and 32b (32c and 32d) are formed so as to be in close contact with the cylinder surface of the cylinder body 19.
  • the guide plates 32a and 32b (32c and 32d) When the comb teeth are not provided, as described above, after one of the guide plates 32a and 32b (32c and 32d) has been stored, the other guide plate must be stored. However, when the comb teeth are provided, the guide plates 32a and 32b (32c and 32d) can be stored at the same time. Therefore, the time taken for storage can be shortened.
  • FIGS. 9 and 10 are schematic views showing another embodiment of an intermediate cylinder for a sheet-feed press in accordance with the present invention. Also, FIG. 11 is a sectional view taken along the line X-X of FIG. 9.
  • a drive rod 43 (see FIG. 11) is additionally provided, and the rotational force of the drive rod 43 is applied to the guide plate 32 via a link or the like, by which the guide plate 32 is swung.
  • the intermediate cylinder 9-2 is provided with arcuate guide plates 32a' to 32d' which are supported by shafts 31a' to 31d', respectively, so as to swing. These shafts 31a' to 31d' and the arcuate guide plates 32a' to 32d' correspond to the shafts 31a to 31d and the arcuate guide plates 32a to 32d.
  • the drive rod 43 is inserted in a rotary actuator 46 fixed to a cylinder body 45. Therefore, the drive rod 43 is rotated by the operation of the rotary actuator 46.
  • One end of a link 47 is fixed to the drive rod 43.
  • the other end of the link 47 is pivotally mounted to one end of a link 49 via a pin 48.
  • the other end of the link 49 is pivotally mounted to the guide plate 32a' via a pin 50.
  • the tip end portions of the guide plates 32a' and 32b' are connected to each other via a link 51 and pins 52 and 53, and the tip end portions of the guide plates 32c' and 32d' are connected to each other in the same way.
  • An air hole 54 is formed at one end portion of the cylinder body 45.
  • One end of the air hole 54 is connected to an air source (not shown) via a rotary joint 55 and a pipe 56, and the other end thereof is connected to the rotary actuator 46 via a pipe 57.
  • the swinging motions of the guide plates 32a' and 32c' are transmitted to the guide plates 32b' and 32d' via the link 51, by which the guide plates 32b' and 32d' are also swung following the swinging motions of the guide plates 32a' and 32c'.
  • the same effects and operation as those of the intermediate cylinder 9-1 shown in FIG. 1 can be achieved.
  • the driving mechanism for the guide plates 32a' to 32d' can be made simple, and the mechanical stability of the guide plates 32a' to 32d' when the skeleton type intermediate cylinder is set and when the cylindrical type intermediate cylinder is set is enhanced.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP99305254A 1998-12-18 1999-07-02 Cylindre intermédiaire pour une presse à feuilles Withdrawn EP1010526A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10360190A JP2000177104A (ja) 1998-12-18 1998-12-18 枚葉印刷機の中間胴
JP36019098 1998-12-18

Publications (1)

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EP1010526A1 true EP1010526A1 (fr) 2000-06-21

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EP99305254A Withdrawn EP1010526A1 (fr) 1998-12-18 1999-07-02 Cylindre intermédiaire pour une presse à feuilles

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7156021B2 (en) * 2004-02-27 2007-01-02 Heidelberger Druckmaschinen Ag Machine for processing sheets of printing material
DE102005057367A1 (de) * 2005-12-01 2007-06-06 Koenig & Bauer Ag Bogendruckmaschine und Verfahren zum Betreiben der Bogendruckmaschine
US7320281B2 (en) 2002-12-20 2008-01-22 Heidelberger Druckmaschinen Ag Method of varying a drum profile of a vario drum and vario drum for implementing the method
DE10335773B4 (de) * 2002-09-17 2008-05-08 Heidelberger Druckmaschinen Ag Bogentransporttrommel
DE102008021693A1 (de) 2008-04-30 2009-11-05 Koenig & Bauer Aktiengesellschaft Bedruckstoffe führende Fläche in Druckmaschinen
DE102008021694A1 (de) 2008-04-30 2009-11-05 Koenig & Bauer Aktiengesellschaft Flächenelement mit einer hohen Formstabilität für Druckmaschinen und Verfahren zu seiner Herstellung
DE102013202107A1 (de) 2012-02-13 2013-08-14 Koenig & Bauer Ag Übergabetrommel zum Führen eines Bogens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013184449A (ja) * 2012-03-09 2013-09-19 Ryobi Ltd 枚葉印刷機の渡し胴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185965A2 (fr) * 1984-12-28 1986-07-02 Heidelberger Druckmaschinen Aktiengesellschaft Cylindre de transfert pour machine à imprimer des feuilles
EP0703072A1 (fr) * 1994-09-05 1996-03-27 Heidelberger Druckmaschinen Aktiengesellschaft Tambour de transfert de feuilles
US5579691A (en) * 1994-12-20 1996-12-03 Heidelberger Druckmaschinen Ag Sheet transfer drum in a multi-color sheet-fed rotary printing press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185965A2 (fr) * 1984-12-28 1986-07-02 Heidelberger Druckmaschinen Aktiengesellschaft Cylindre de transfert pour machine à imprimer des feuilles
EP0703072A1 (fr) * 1994-09-05 1996-03-27 Heidelberger Druckmaschinen Aktiengesellschaft Tambour de transfert de feuilles
US5579691A (en) * 1994-12-20 1996-12-03 Heidelberger Druckmaschinen Ag Sheet transfer drum in a multi-color sheet-fed rotary printing press

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10335773B4 (de) * 2002-09-17 2008-05-08 Heidelberger Druckmaschinen Ag Bogentransporttrommel
US7320281B2 (en) 2002-12-20 2008-01-22 Heidelberger Druckmaschinen Ag Method of varying a drum profile of a vario drum and vario drum for implementing the method
DE10355045B4 (de) 2002-12-20 2018-09-06 Heidelberger Druckmaschinen Ag Verfahren zur Variation eines Trommelprofils einer Vario-Trommel und Vario-Trommel zur Durchführung des Verfahrens
US7156021B2 (en) * 2004-02-27 2007-01-02 Heidelberger Druckmaschinen Ag Machine for processing sheets of printing material
DE102005057367A1 (de) * 2005-12-01 2007-06-06 Koenig & Bauer Ag Bogendruckmaschine und Verfahren zum Betreiben der Bogendruckmaschine
DE102008021693A1 (de) 2008-04-30 2009-11-05 Koenig & Bauer Aktiengesellschaft Bedruckstoffe führende Fläche in Druckmaschinen
DE102008021694A1 (de) 2008-04-30 2009-11-05 Koenig & Bauer Aktiengesellschaft Flächenelement mit einer hohen Formstabilität für Druckmaschinen und Verfahren zu seiner Herstellung
DE102013202107A1 (de) 2012-02-13 2013-08-14 Koenig & Bauer Ag Übergabetrommel zum Führen eines Bogens
DE102013202107B4 (de) 2012-02-13 2023-12-28 Koenig & Bauer Ag Übergabetrommel zum Führen eines Bogens

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