• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a rotary offset printing machine, the first of a plurality of successively arranged printing units suitable for perfecting is additionally suitable as an imprinting unit for rapidly exchanging printing plates. …<??>With rapidly exchanging printing plates, the double-diameter blanket cylinder interacts with a back pressure cylinder which, for the perfecting operation, is mounted so as to be swivelled completely away from the blanket cylinders and a web of printing material.
    公开号:SU1732811A3
    申请号:SU894614620
    申请日:1989-07-21
    公开日:1992-05-07
    发明作者:Мартин Михаэль Фишер Кристиан；Хольм Хельмут
    申请人:Кениг Унд Бауер Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to printing presses, in particular to a role-fed rotary offset machine.
    A known role-fed rotary offset machine, containing successively installed printing units for double-sided printing of the web, including pairs of interacting form and offset cylinders, and at least one printing unit capable of changing the printing forms without stopping the machine, is equipped with means for stopping one pair of form and offset the cylinders and the offset cylinders installed behind the offset cylinders as the roller moves, which in the two-sided printing mode serves to guide the web, and when stopping a pair of plate and blanket cylinders as a backpressure cylinder, interacts with another pair of plate and blanket cylinders, and a drive.
    A disadvantage of the prior art rotary offset printing machine is that the contact of the guide roller with a freshly printed web results in a certain marking of the printed image, as a result of which the quality of the printed product is reduced. In addition, a paint deposit is formed on the guide cylinder, and therefore a regular cleaning of the cylinder is required, which
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    associated with undesirable machine downtime. In the worst case, crushing may occur when the cylinder makes contact with a freshly printed web.
    The aim of the invention is to improve the quality of printed products.
    This goal is achieved by the fact that in a role-fed rotary offset machine containing sequentially installed printing units for two-sided printing of a web, including pairs of interacting printing and offset cylinders, and at least one printing unit capable of changing the printing forms without stopping the machine, is equipped with stopping one pair of plate and offset cylinders and a backpressure cylinder installed behind offset cylinders as the web is being moved, and the drive, cylinder, The pressure control is equipped with a means of removing it from the offset cylinders and supplying them.
    It is advisable to make offset cylinders of the assembly with replaceable printing plates with double diameters as compared with the diameters of the forme cylinders in contact with them, since this creates favorable conditions for rotation of the counterpressure cylinder, i.e. the path of rotation of the counterpressure cylinder from the standby position, in which it is located at a distance from the offset cylinders and from the web, to the working position, i.e. to the position in which it interacts with the web and with the offset cylinder or with both cooperating offset cylinders, is short.
    Fig. 1 shows a role-fed rotary offset machine, in which a node with interchangeable printing forms is presented in double-sided printing mode, side view; FIG. 2 shows a gear drive of a printing assembly with replaceable printing plates; on fig.Z - gear drive, top view; Fig. 4 shows a device for adjusting the position of a backpressure cylinder and one blanket cylinder of a unit with interchangeable printing plates; Fig. 5 is a flow chart of the printed web when changing printing plates without stopping the machine and with single-sided printing, respectively.
    Fig. 1 shows two successively installed printing assemblies 1 and 2 of a role-fed rotary offset printing machine for double-sided printing (the inking and moistening machines are not shown). When this printing unit 2 contains a form cylinder 3, interacting with the offset cylinder 4, and additional
    a plate cylinder 5, which interacts with an additional offset cylinder 6. The printing unit 1, designed to change printing forms without stopping the machine, has one form cylinder 7, which interacts with one offset cylinder 8, made with double diameter compared to the plate cylinder 7, and the second plate cylinder 9, interacting with the second offset cylinder 10, made with double diameter compared with plate cylinder 9, as well as a counter-pressure swivel cylinder 11. In one-sided printing mode, the backpressure cylinder 11 can, optionally, be brought into contact with one offset cylinder 8 and / or the second cylinder 10. To this end, the backpressure cylinder 11 is set to rotate to the first end position I, i.e. working position. In double-sided printing mode, the backpressure cylinder 11 is rotatably mounted to the second end position II, i.e. waiting position.
    The cylinders of each printed circuit assembly 1 and 2 are driven by the corresponding printed circuit packs placed on one side.
    node 1 and 2 of their means of connection with the main drive shaft 12, including the toothed drive chains. In double-sided printing, the cylinder of the printing assembly 1 is driven through the first conical
    gear 13 (figure 2 on the left). With double-sided printing, the second offset cylinder 10 is in the working position, and one offset cylinder 8 is in the first working position, indicated by A. The conical gear 13 consists of a bevel wheel 14 and a flat bevel wheel 15 and through a switchable coupling 16, for example an electromagnetic sleeve connected to the main
    drive shaft 12. A flat conical wheel 15 is rigidly connected to a cylindrical wheel 17, which engages with a gear wheel 18 of a second forme cylinder 9, which engages with a gear wheel 19 of a second offset cylinder 10. Gear wheel 19 engages with a gear wheel 20 single cylinder cylinder &amp;, meshed with a gear wheel 21 of one plate
    cylinder. In this case, the gears 18-21 form a gear drive chain of the printing unit 1. The gear wheel 22 of the counter-pressure cylinder 11 does not engage with the gear wheels 20 and 19 of the first 8 and second 10 offset cylinders.
    With one-sided printing, the printing unit 1 is driven through a second bevel gear 23 (in Fig. 2, right). In this case, the drive connection between the main drive shaft 12 and the bevel gear 13 is disconnected by means of the coupling 16.
    The tapered gear train 23 consists of a first tapered wheel 24 and a flat tapered wheel 25, and in the first embodiment of the direction of the printed web 26, indicated by a continuous line in FIG. 5, is connected to the main drive shaft 12 via a switchable coupling 27, for example an electromagnetic coupling.
    The flat bevel wheel 25 is rigidly associated with a cylindrical wheel 28 which engages with an intermediate wheel 29, which engages with a gear wheel 22 of the counter-pressure cylinder 11. When the second blanket cylinder 10 is in the working position, and one blanket cylinder 8 is in the inoperative position, indicated by the dashed line B, the gear wheel 22 engages with the gear wheel 19 of the second offset cylinder 10
    In the second variant of the direction of the printed web 26, indicated by the dash-dotted line in FIG. 5, reverse rotation of the counter-pressure cylinder 11 is necessary. It is implemented using means comprising the above-mentioned bevel gears 13 and 23 and the couplings 16 and 27, as well as the second switchable coupling 30 connecting the second bevel wheel 31 to the main drive shaft 12. In this case, the drive of the flat bevel wheel 25 performs This second bevel wheel 31 is used. The main drive shaft 12 passes through all of the bevel wheels 14, 24 and 31.
    When one blanket cylinder 8 is in the second operating position, indicated by the dash-dotted line B, and the second blanket cylinder 10 is in the inoperative position, the gear wheel engages with the gear wheel 21 of the same platen cylinder 7. At the same time, the gear wheel 20 of the same offset cylinder 8 is not engaged with the gear wheel 19 of the second offset cylinder 10. A pair of one pin cylinder 7 and one offset cylinder 8 is engaged in rotation in the desired reverse direction by the engagement of gear wheels 22 and 20.
    All plate and offset cylinders and a backpressure cylinder are mounted in the side walls by known methods (not
    are shown) of the role rotational offset machine.
    All plate cylinders 3, 5, 7 and 9 are installed without the possibility of rotation. Offset cylinders 4, 6 and 10 are installed with the possibility of supplying, i.e. turning to working position, and retraction, i.e. turning to the non-working position using adjustable eccentric bushings,
    At the same time, the eccentrics are set so that in the off position the engagement of the gears of the offset cylinders 4, 6 and 10 with the gears of the forme cylinders 3, 5 and 9 is preserved, therefore, the interaction between the corresponding pairs of the form and offset cylinders is maintained.
    A counterpressure cylinder 11 with pins 32 is mounted in an eccentric sleeve 33 in the side frames. The eccentric bushing 33 is moved by means of an actuator (not shown) through the lever mechanism 34. By turning the eccentric bushing 33, the backpressure cylinder 11 can be moved from the standby position II, in which it is in two-sided printing, to the working position I, in which it is located when changing printing plates (1/0, 0/1), without stopping the machine or with double sided printing (2/0, 0/2).
    In order to rotate the cylinder 11 of the counterpressure from the working position I to the waiting position, it is necessary to rotate the eccentric sleeve 33 by an angle "(approximately 35 °). The magnitude of the angle a depends on the size of the eccentric support of the cylinder 11 of the counterpressure and is about 25-90 °.
    The rotation angle a is the angle by which the counter-pressure cylinder 11 is rotated from the contact position with one offset cylinder 8 (position B) in order to achieve a sufficient distance of the counter-pressure cylinder 11 from the printed sheet 26. The axis 35 of the eccentric bushing 33 is located on an imaginary direct 36, which in the case of interaction of the backpressure cylinder 11 with one offset cylinder 8 at a right angle intersects the axes 37 and 38 of rotation of the back pressure cylinder 11 and one offset cylinder 8.
    In the standby position II, the backpressure cylinder 11 is retracted from the two offset cylinders 8 and 10. At the same time, it is at a distance from the printed web 26, which is about 1 to 5 mm. Its drive is stopped by disconnecting clutches 27 and 30.
    One offset cylinder 8 is mounted by pins 39 in a first eccentric sleeve 40, which is located in a second eccentric sleeve 41. This double eccentric support allows one offset cylinder 8 to be rotated into three end positions A, B, and C using actuators (not shown), acting through lever mechanisms 42 and 43 on the eccentric bushings 40 and 41. Executive bodies can be performed, for example, in the form of hydraulic or pneumatic cylinders. However, other forms of these organs are also possible.
    When one blanket cylinder 8 is in end position A, indicated by a continuous line, it interacts with the second blanket cylinder 10 (and is also in contact with one forme cylinder 7).
    When one blanket cylinder 8 is in the final position B indicated by the dash-dotted line, it interacts with the counter-pressure cylinder 11 provided that the latter is in the working position 1, and it also is in contact with one of the printing cylinder 7. In this case, one offset cylinder 8 is not interact with the second offset cylinder 10.
     When one blanket cylinder 8 is in end position B marked with a dashed line, it is not in contact with either the second blanket cylinder 10, nor with the counter-pressure cylinder 11 and one forma cylinder 7. The drive of one blanket cylinder 8 in this case is stopped,
    The accelerator and drive means used for changing plates without stopping the machine are not the object of the invention, therefore they are described only briefly.
    Each offset cylinder 8 and 10 is equipped with its own drive (e.g., electric motor, hydraulic motor, etc.), which allows it to be accelerated from the idle position or from the rest position to the working speed of the machine. When the synchronous speed is reached, the offset form of the cylinder 8 or 10 that was previously allotted for the change of the printing plate is rotated into the working position. With this, the gear wheels 19 and 20 re-engage with the gear wheel 22. Then the acceleration drive can be stopped.
    Role rotational offset machine works as follows.
    In the case of using the printed circuit assembly 1 in the one-sided printing mode, the web 26 is fed into it, for example, from above (figure 5) and first enters the first gap
    between the second offset cylinder 10 and the counter-pressure cylinder 11. Next, the web 26 is fed around the counter-pressure cylinder 11 into the gap between one offset cylinder 8 and the counter-pressure cylinder 11. In this case, one offset cylinder 8 is in the position B of contact with the counterpressure cylinder 11, the Second offset cylinder 10 is also in the position of contact with the pressure cylinder 11, which is in the working position I. In this case, the web 26 is sealed in single-sided printing mode.
    In the case of using a printhead
    0 1 in printing mode with plate change without stopping the machine, starting from. one-sided printing, one offset cylinder 8 is rotated to a finite position by means of a lever mechanism 42 (FIG. 4). For this eccentric sleeve 40 is rotated clockwise. In the B position, one offset cylinder 8 is not in contact with the backpressure cylinder 11 and with one
    0 by the form cylinder 7, and the counter pressure cylinder 11 is in the working position I. In this case, the web 26 is sealed only by the second offset cylinder 10 and the pressure cylinder 11, which are in the working positions.
    In the case of using the printing unit 1 in the double-sided printing mode, one offset cylinder 8, based on the
    0B, rotates to the position of contact A. For this, the eccentric bushings 40 and 41 are rotated counterclockwise and the eccentric sleeve 33 of the cylinder 11 of the counterpressure is rotated counterclockwise to the waiting position It. In this case, the web 26 is sealed on both sides in the gap formed by the second offset cylinder 10 located in
    0 working position, and one offset cylinder 8, which is in the first working position A, and the counter pressure cylinder 11 is not in contact with the first 8 and second 10 offset cylinders and the web 26, i.e. the counter cylinder 11 is then in the standby position II.
    权利要求:
    Claims (8)
    [1]
    Claim 1. A role-fed rotary offset machine, comprising successively installed printing units for double-sided printing of a web, including pairs of cooperating forming and offset cylinders, wherein at least a gray-colored printing unit is configured to change printing forms without stopping the machine, equipped with means for stopping one pair plate and offset cylinders and a backpressure cylinder installed behind the offset cylinders along the web movement and the drive, characterized in that improving the quality of printed products, the backpressure cylinder is equipped with a means of removing it from the offset cylinders and supplying them.
    [2]
    2. The machine according to claim 1, characterized in that the offset cylinders of the assembly with interchangeable printing plates have double diameters as compared with the diameters of the for- mign cylinders in contact with them.
    [3]
    3. The machine according to claims 1 and 2, characterized in that one of the offset cylinders of the assembly with interchangeable printing forms is installed with the ability to interact
    with one forme cylinder and a second offset cylinder or with one forme cylinder and a counterpressure cylinder, and is provided with a means of withdrawing from the plate
    cylinder, cylinder backpressure and second offset cylinder,
    [4]
    4. The machine according to claims 1 and 3, characterized in that the means for withdrawing the back pressure cylinder and the offset cylinder are made in the form of eccentric sleeves.
    [5]
    5. The machine according to claims 1-4, characterized in that the printing assembly with exchangeable printing plates is provided with means for connecting its cylinders with the main drive shaft of the drive, including a toothed drive chain.
    [6]
    6. Machine on PP. 1-5, which is related to the fact that the assembly with interchangeable printing plates is equipped with means for reversing cylinders connecting the main drive drive shaft with the drive gear chain.
    [7]
    7. The machine according to claim 6, wherein the means for reversing the cylinders comprise electromagnetic couplings and bevel gears.
    [8]
    8. Machine on PP. 1, 3 and 4, in which, in the case of the interaction of the back pressure cylinder with the rotary offset cylinder, the axis of rotation of the eccentric sleeve of the back pressure cylinder is located on a straight line intersecting the cylinders at the right angle.
    ABOUT
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    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3825145C2|1991-02-07|
    EP0352521A3|1990-04-11|
    FI893534A0|1989-07-21|
    US5012735A|1991-05-07|
    JPH0267134A|1990-03-07|
    EP0352521A2|1990-01-31|
    FI893534A|1990-01-24|
    JPH0751348B2|1995-06-05|
    DE3825145A1|1990-01-25|
    引用文献:
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    GB436649A|1934-01-16|1935-10-16|Goss Printing Press Co England|Improvements in or relating to printing presses|
    GB559853A|1942-07-02|1944-03-08|Goss Printing Press Co Ltd|Improvements in or relating to printing presses|
    US2444547A|1943-09-14|1948-07-06|Goss Printing Press Co Ltd|Printing machine|
    DE1062256B|1954-02-26|1959-07-30|Warner Jones & Company Ltd K|Device for turning on and off printing rollers in printing machines by means of a mechanical eccentric control|
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    DD125630A1|1976-05-13|1977-05-04|
    US4208963A|1978-04-18|1980-06-24|Dahlgren Manufacturing Company|Newspaper printing system|
    EP0114237A1|1983-01-20|1984-08-01|M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft|Printing press having two double size cylinders for printing sheets on both sides|
    DE3510823C1|1985-03-26|1986-09-11|Roland Man Druckmasch|Web-fed rotary offset printing machine with a printing unit for flying plate changes|
    DE3614030A1|1986-04-25|1987-10-29|Roland Man Druckmasch|PRINTER FOR A ROLL ROTATION PRINTING MACHINE|JPH0719791Y2|1991-06-01|1995-05-10|株式会社東京機械製作所|Rotary press|
    DE9321319U1|1993-12-29|1997-03-20|Wifag Maschf|Drive of an ink transfer printing cylinder of a web-fed rotary printing press|
    DE4345570B4|1993-12-29|2011-06-16|Wifag Maschinenfabrik Ag|Drive for cylinder of a rotary printing machine|
    DE4344896C5|1993-12-29|2004-07-29|Maschinenfabrik Wifag|Drive for cylinder of a web-fed rotary printing machine|
    DE4415711A1|1994-05-04|1995-11-09|Roland Man Druckmasch|Printing unit for rubber-rubber printing|
    DE4435429C2|1994-10-04|2000-07-06|Wifag Maschf|Web rotary printing machine|
    DE19603663A1|1996-02-02|1997-08-07|Roland Man Druckmasch|Printing unit for the flying printing plate change|
    DE19629605C2|1996-07-23|2000-02-03|Koenig & Bauer Ag|Drive a printing unit|
    JPH10100526A|1996-10-02|1998-04-21|Shikoku Kakoki Co Ltd|Imprinting device|
    DE19743770A1|1997-10-02|1999-04-08|Heidelberger Druckmasch Ag|Method for operating a rotary printing press and device for carrying out the method|
    DE19949751A1|1999-10-15|2001-04-19|Heidelberger Druckmasch Ag|Modular printing machine system for printing sheets|
    JP2004504189A|2000-07-22|2004-02-12|ケーニツヒ　ウント　バウエル　アクチエンゲゼルシヤフト|Printing unit for offset printing press|
    DE10046374B4|2000-09-20|2014-05-15|Koenig & Bauer Aktiengesellschaft|Method for operating a printing unit|
    JP2003326820A|2002-05-14|2003-11-19|Toshiba Corp|Stamping device for paper and the like|
    GB0315986D0|2003-07-08|2003-08-13|Goss Graphic Systems Ltd|Printing press|
    US8051774B2|2004-04-29|2011-11-08|Goss Graphic Systems Limited|Printing plate module, printing press, and method of mounting plates|
    GB2425987A|2005-05-09|2006-11-15|Goss Graphic Systems Ltd|Printing plate unloading apparatus and method|
    GB2428634B|2005-08-04|2008-09-17|Goss Graphic Systems Ltd|Printing press|
    JP2008012738A|2006-07-04|2008-01-24|Mitsubishi Heavy Ind Ltd|Web offset printing press and adjusting method of tilt angle of printing cylinder|
    DE102006046894B4|2006-10-04|2010-05-27|Wifag Maschinenfabrik Ag|Method for starting up a web-fed rotary printing press|
    DE102009002103B4|2009-04-01|2011-07-07|KOENIG & BAUER Aktiengesellschaft, 97080|Printing machine and a method for printing a web-shaped substrate|
    WO2016000749A1|2014-06-30|2016-01-07|Hewlett-Packard Indigo B.V.|Contact control of print blanket to impression drum|
    DE102017222700A1|2017-07-17|2019-01-17|Heidelberger Druckmaschinen Ag|Printing machine with twin printing unit and method for operating such a printing press|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3825145A|DE3825145C2|1988-07-23|1988-07-23|
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