EP1099549B1 - Device and method for supporting a cantilever-mounted cylinder - Google Patents

Abstract

The arrangement has a first control device (50), a first supporting arm (40) connected to the control device and that acts selectively on a cantilever mounted cylinder, a second control device (80) and a second supporting arm (70) connected to the second control device and that acts selectively on a second cantilever mounted cylinder. The first and second supporting arms pivot about a common pivot axis (61). Independent claims are also included for the following: a web-fed rotary printing machine and a method of picking up channel-less printing sleeves.

Description

The present invention relates to an apparatus and a method for supporting overhung cylinders, especially in a roller ration printing machine, according to the preamble of claims 1 and 7.

US Pat. No. 5,429,048 describes an offset printing machine in which one to be printed Material web is guided through a variety of printing units. Each of the printing units includes an upper plate cylinder, an upper blanket cylinder, a lower one Blanket cylinder and a lower plate cylinder. Can on the plate cylinders illustrated printing plates and channelless, sleeve-shaped on the blanket cylinders Blankets to be attached. During the printing process, the material web is between passed through the upper and lower blanket.

The sleeve-shaped blanket is pushed axially onto the blanket cylinder and subtracted axially. During printing, the blanket cylinder is on both ends rotatably mounted. To pull off the rubber blanket axially, however, a door is attached to the Operator side of the printing press opened so that the blanket cylinder is flying stored and supported only on the drive side of the press. For support of the blanket cylinder in the overhung state is one on the operator side of the Printing machine arranged support device is provided.

In US 5,678,485 is a support and lifting mechanism for a printing machine with axial removable pressure sleeves described. There is one for each cantilever cylinder Support mechanism provided that an actuator, z. B. a pneumatic cylinder, and a counterweight lever having an arcuate portion that opens a cylinder pin acts on the drive end of the cylinder. The support device is from a parked position in which the arcuate portion the Cylinder pin not contacted, movable into an employed position in which the arcuate section contacted the cylinder in the non-printing state Allow pulling off the sleeve.

The support mechanisms described in US 5,678,485 are complicated and take up a lot of space. Because of the many connections, they are difficult be adjusted. They are also unsuitable for vertical path arrangements.

EP 0 575 739 A1 discloses a device for supporting a cylinder in one Rotary printing machine, wherein a respective rotary arm by means of a respective Actuating cylinder is pivoted via a respective counterweight mechanism, that a respective holding surface with a respective journal of printing cylinders in Is brought into contact. Each swivel arm can be swiveled around its own axis of rotation, so that the two rotary arms are at a distance from each other that corresponds to the distance between the essentially corresponds to both axes of rotation.

EP 0 663 291 A1 discloses a device for adjusting the pressure of one with a push-fit sleeve equipped pressure cylinder. The storage of the impression cylinder has an eccentric bush to which a coupling causing its rotation multi-link gearbox is articulated. To change the sleeve in the The hinge is a to enable printing press remaining printing cylinder Swiveling the coupling from the area of a sleeve changing Frame opening designed to be separable.

It is an object of the present invention to provide a simple, compact and to create a reliable support device for a cylinder in a printing press. A Another object of the present invention is a simple and reliable Method for supporting an overhung cylinder in a printing press To provide, which is feasible in a confined space.

These objects are solved by the features of claims 1 and 7.

Further features of the invention emerge from the subclaims.

A device according to the invention for supporting overhung cylinders, especially in a web-fed rotary printing press, with a first adjusting device, a first support arm connected to the first adjusting device, optionally on a cantilevered cylinder acts with a second actuator and one with the second actuator connected second support arm, which is optionally on a other overhung cylinders is characterized by the fact that the first and the second support arm to perform its support function about a common pivot axis are pivotable in different directions.

The support device according to the invention makes it reliable in a compact manner Support for the cylinders of the printing press, which is particularly suitable for Printing machines in a vertical arrangement, through which a paper web is guided vertically.

The support arms can also include adjustable ends so that their effect on the cylinder is easily adjustable. The adjustable ends can preferably be from Curves are driven in addition to horizontal adjustment of the cylinder enable. The adjustable ends can be flat or curved be so that they make positive contact with a disc-shaped end of the cylinder.

The support arms can preferably be arranged directly above the cylinders, wherein the lower ends of the support arms contact the cylinders and the upper part of the arms is connected to the actuators. Furthermore, the two support arms preferably have mutually abutting, opposite side surfaces which contact each other in the deactivated state of both support arms.

An embodiment of a web-fed rotary offset printing machine according to the invention in particular for printing on a vertically guided web comprises a first Blanket cylinder with a first end and a second end, and one on the first blanket cylinder arranged, removable over the second end Blanket. In addition to the first blanket cylinder, a second blanket cylinder is included a third end and a fourth end arranged on one over the fourth end Peelable second rubber blanket is arranged, one with the first rubber blanket Forms pressure gap through which a material web can be guided vertically. A first one Support arm, which optionally supports the first end of the first blanket cylinder, and a second support arm that optionally supports the third end of the second blanket cylinder, are pivotable about a common pivot axis.

The vertical web-fed rotary offset printing machine according to the invention enables in advantageously a compact arrangement with axially removable rubber blankets Blanket cylinders that can be supported optionally.

An inventive method for removing canal pressure sleeves with the Method steps: rotating a first support arm to support a first end of one first cylinder; Withdrawing a first pressure sleeve from the first cylinder; Turning one second support arm for supporting a second end of a second cylinder; and Withdrawing a second pressure sleeve from the second cylinder; is characterized by the Method step: rotating the first support arm and the second support arm by one common pivot axis in different directions to perform its support function. The common swivel axis creates a method for supporting two cylinders enables which can be performed reliably in a small space.

The printing sleeves can be used, for example, as rubber blankets, in particular next to one another arranged blanket sleeves of a web-fed rotary offset printing press with vertical arranged printing units can be formed. However, it can be the case with the pressure sleeves also act as sleeve-shaped pressure plates.

The first support arm and the second support arm are rotatable in opposite directions, to develop their support effect, for example, the first arm in the Counterclockwise and the second arm can be rotated clockwise.

The features of the present invention will become apparent in the following description preferred embodiments in connection with the accompanying, below listed drawings explained in more detail.

Fig. 1

eine schematische, vereinfachte Seitenansicht einer Ausführungsform des erfindungsgemäßen Druckwerks einer Rollenrotations-Offsetdruckmaschine in vertikaler Anordnung;

Fig. 2

eine schematische, vereinfachte Darstellung eines in Fig. 1 gezeigten fliegend gelagerten Gummituchzylinders,

Fig. 3

eine Seitenansicht der erfindungsgemäßen Stützvorrichtung; und

Fig. 4

eine perspektivische Darstellung der in Fig. 3 gezeigten Stützvorrichtung.

Show it:

Fig. 1

a schematic, simplified side view of an embodiment of the printing unit according to the invention of a web-fed offset printing press in a vertical arrangement;

Fig. 2

1 shows a schematic, simplified representation of a rubber blanket cylinder with a floating bearing shown in FIG. 1,

Fig. 3

a side view of the support device according to the invention; and

Fig. 4

a perspective view of the support device shown in Fig. 3.

Fig. 1 shows a side view of a preferred embodiment of a Web-fed rotary printing press in a vertical arrangement. The schematic representation shows an offset printing unit 1 of a printing press, through which a material web vertically to be led. The printing unit 1 comprises a first plate cylinder 10, a first Blanket cylinder 12, a second blanket cylinder 22 and a second Plate cylinder 20. During the printing operation of the printing unit 1, a Material web, e.g. B. a paper web through which between the blanket cylinders 12,22 formed pressure gap led.

During the printing process, ink is transferred to the plate cylinders 10, 20 so that the images to be printed are colored. Of the plate cylinders 10, 20, the Paint on the axially removable blankets on blanket cylinders 12 and 22 respectively and from there to the web passing through the printing nip.

1 shows a schematic illustration of the drive side of the printing unit 1. The axially removable blankets on the blanket cylinders 12 and 22 are from the other side, the operator side, the printing unit 1 pushed and pulled. As in Fig. 2 is shown schematically, is located on the operator side of the printing press movable door 3 with a clamping mechanism for the operator end 15 of Blanket cylinder 12. The axially removable blanket 16 is over the end 15th and is preferably similar to that described in US 5,429,048 Blankets trained. The movable door and the clamping mechanism can for example, similar to the device described in US 5,678,485 his.

On the drive side of the printing unit 1, shown schematically in FIG Support device 30 according to the invention arranged. This is activated when the Blankets are to be removed from the blanket cylinders 12 and 22. The Support device 30 acts on the via a contact element or a contact adapter 13 drive-side end of the blanket cylinder 12, which in the drive-side frame 14 of the Printing unit 1 is stored.

A side view of the support device 30 is shown in more detail in FIG. 3. On the drive side End of the blanket cylinders 12 and 22 are contact elements or contact adapters 13 or 23 arranged. A first rotatable about an axis 60 with a pivot axis 61 Support arm 40 optionally acts on contact element 13. Arm 40 includes one annular extension 41 which fits around the axis 60. The axis 60 is on drive-side frame 14 attached. The first arm 40 includes an adjustable end 42 which is adjustable, for example, via bolts 44 and 46 or by means of a curve is horizontally movable. Although the adjustable end 42 here has a flat Bottom surface is shown, it can alternatively have an arcuate bottom surface, the contacted the contact element 13 in a form-fitting manner. Opposite the adjustable end 42 A connection to a first actuating device 50 is arranged lying down Connector 51, a plate rotatable about a bolt 53 attached to the frame 14 52 and a pneumatic device 54, which by means of a bolt 55 on a End is rotatably attached to the frame. The pneumatic device 54, e.g. B. a Pneumatic cylinder, the plate 52 can rotate so that the arm 40 is rotated about the axis 60 becomes.

For the second blanket cylinder 22, the support device 30 comprises a second one Support arm 70 with a second adjustable end 72 which on the contact element or the contact adapter 23 acts. The second arm 70 has an annular extension the axis 60, which is arranged behind the annular extension 41. A similar one like the adjusting device 50 designed adjusting device 80 is between the second Support arm 70 and a bolt 75 attached.

As shown in FIG. 4, the adjusting device 80 comprises a frame 14 attached Stop 82 to limit the movement of the actuator when it is not actuated becomes. The adjusting device 50 preferably comprises a similar stop. The poor 40, 50 are also preferably supported by a support 90, which, however, a Rotational movement of the arms around the axis 60 allows.

During the printing operation, there is between the support arms 40, 70 and their respective Contact element 13 or 23, an intermediate space 100. To carry out a Blanket change on the printing unit shown in Fig. 1 and 2 is the Actuating device 50 actuated. This will cause the upper end of the arm 40 towards the Bolt 55 pulled so that the counterweight arm 40 counterclockwise around the Pivot axis 61 is rotated. The end 42 then contacts the contact element 13 and apply this pressure. The door 3 can now be opened so that the rubber blanket 16 can be deducted from the blanket cylinder 12. Then a new rubber blanket pushed on, the door closed and the actuating device 50 deactivated, thereby creating the gap 100. To change the rubber blanket on Blanket cylinder 22 is preferably performed a similar process in which the actuator 80 is actuated and the arm 70 clockwise around the Pivot axis 61 is rotated.

The term "arm" is used here as a general expression, the one can designate any rotatable element, for example also that in FIG. 3 shown essentially triangular arm. The term "printing press" is also to be generally understood so that they include, for example, offset printing machines can. The term "blanket sleeve" is used in the context of the present Invention exemplary for any printing sleeve, for. B. also for sleeve-shaped Printing plates, used. Although the device according to the invention is based on two Blanket cylinders have been described, they can also be used to support a Blanket cylinder and a plate cylinder or any other Combination of printing unit cylinders can be used. It is also possible that to use the device according to the invention in printing units in a horizontal arrangement, although it is preferably used in printing units with a vertical arrangement. at the pneumatic devices of the actuators can be, for example Trade Bimba air cylinders with a 50mm bore. However, it can other types of actuators, e.g. B. hydraulic or magnetic Devices are used.

List of reference numbers

1

printing unit

3

door

10

plate cylinder

12

Blanket cylinder

13

contact element

14

drive side frame

15

operator-side end of the blanket cylinder

16

blanket

20

plate cylinder

22

Blanket cylinder

23

contact element

30

support device

40

support arm

41

annular extension

42

adjustable end

44

bolt

46

bolt

50

locking device

51

joint

52

rotating plate

53

bolt

54

pneumatic device

55

bolt

60

axis

61

swivel axis

70

support arm

72

adjustable end

75

bolt

80

locking device

90

support

100

gap

Claims (9)

1. Device (30) for supporting cantilevered cylinders (12, 22), in particular in a web-fed rotary printing press, comprising a first actuating device (50), a first support arm (40) connected to the first actuating device (50) and selectively acting on a cantilevered cylinder (12), a second actuating device (80) and a second support arm (70) connected to the second actuating device (80) and selectively acting on another cantilevered cylinder (22),
   characterized in that, to fulfil their supporting function, the first support arm (40) and the second support arm (70) are swivellable into different directions about a common swivel axis (61).
2. Device according to claim 1,
   characterized by
   an axle (60) about which the first and second support arm (40, 70) are swivellable.
3. Device according to claim 1 or 2,
   characterized in that for contacting the respective cantilevered cylinder (12, 22), the first support arm (40) and/or the second support arm (70) comprise a respective adjustable end (42, 72).
4. Device according to one of the preceding claims,
   characterized in that the first support arm (40) and/or the second support arm (70) are each arranged above a gear-side end of the cantilevered cylinder (12, 22).
5. Device according to one of the preceding claims,
   characterized in that the first support arm (40) has a flat lateral surface arranged opposite a flat lateral surface of the second support arm (70).
6. Web-fed rotary printing press, in particular for printing a web passing in the vertical direction, comprising a first blanket cylinder (12) with a first end and a second end (15); a first blanket (16) arranged on the first blanket cylinder (12) and axially removable over the second end (15); a second blanket cylinder (22) adjacent to the first blanket cylinder (12) and having a third and a forth end; a second blanket arranged on the second blanket cylinder and axially removable over the forth end and forming a printing nip with the first blanket (16) through which nip a web of material can pass in the vertical direction;
   characterized by
   a device according to one of the preceding claims.
7. Method of removing gapless blanket sleeves comprising the steps of
   rotating a first support arm (40) for supporting a first end of a first cylinder (12);
   pulling off a first printing sleeve (16) from the first cylinder (12);
   rotating a second support arm (70) for supporting a second end of a second cylinder (22); and pulling off a second printing sleeve from the second cylinder (22),
   characterized by
   the step of rotating the first support arm (40) and the second support arm (70) in different directions about a common swivel axis (61) so that they fulfil their supporting function.
8. Method according to claim 7,
   characterized in that the first printing sleeve (16) and the second printing sleeve are a first and a second blanket of an offset printing press, and that the first and second blanket (16) are arranged adjacent to each other during the printing operation so as to form a printing nip.
9. Method according to one of claims 7 to 8,
   characterized in that a door (3) on the work side of the first cylinder (12) is opened.

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