EP0740608B1 - Device for mounting, dismounting and transporting curved objects that are easy to bend and have hanging up edges - Google Patents

Description

The invention relates to a device for assembly, Disassembly and transport of easily bendable, curved objects with hooked edges, preferably printing plates, on and from a cylinder a rotary printing press according to the preamble of Claim 1.

DE 28 04 970 A1 describes a device for assembling and disassembling printing plates in a rotary printing press.
Here, a suction element performs a linear movement between a delivery roller and a plate cylinder and thus transports the printing plate.
This suction element is attached to a slide by means of a cylinder, which is driven by a chain. Through this cylinder, the suction element can perform a lifting movement at right angles to the slide movement for raising and lowering the pressure plate. For assembly, the suction element fixes a front, bent end of the pressure plate by switching on the suction effect. The suction element with the plate is lifted by means of the cylinder and conveyed in the direction of the plate cylinder through the carriage with chain drive. There is a positioning table between the delivery roller and plate cylinder on which the printing plate is placed and positioned. The suction element then takes over the pressure plate again and transports it to a groove in the plate cylinder. The folded end of the pressure plate is inserted into this groove of the plate cylinder by lowering the suction element.

After turning off the suction, the turns Plate cylinder with the printing plate that itself at the same time handled by the information roller. Is the Printing plate almost completely from the delivery roller unrolled, the suction element engages a rear end of the Pressure plate and this leads into another groove of the Plate cylinder.

A disadvantage of this device is that the Pressure plate on a positioning table that is between the identification roller and the plate cylinder, must be filed and positioned. During the Transport of the printing plate from the positioning table to the cylinder and during the mounting process Pressure plate in the cylinder may have tolerances for example play in the slide guide, the incorrect axial position of the pressure plate cause the cylinder.

The US 47 27 807 A describes a device for assembling and disassembling printing plates in a rotary printing press. Here, a handling device that receives the printing plate is moved by a robot between a supply device and a plate cylinder. Four suction pads with which the pressure plate is held are rigidly attached to the handling device.
For assembly, the pressure plate is conveyed from the supply device to the plate cylinder by multi-axis movements of the robot and hooked into a clamping channel of the cylinder with a bend.
The pressure plate is positioned axially via a drive that is controlled by force sensors. Four pressure rollers are then turned on by swiveling the handling device. By rotating the plate cylinder, the pressure plate is applied to the plate cylinder and another end is inserted into the channel.

The disadvantage of this device is that the handling unit in the radial plane of the Plate cylinder movable in several directions and must be pivotable and this complicated drives and controls are necessary. In addition, per cylinder not transported several printing plates at the same time and be assembled or disassembled.

The invention has for its object a Device for assembly, disassembly and transport of easily bendable, curved objects with hooked edges, preferably pressure plates, whose respective legs have an opening angle smaller Include 90 ° and no cutouts for Have register pins on and from a cylinder too create an obstacle-free in a parking position Operation and maintenance as well as free accessibility which enables printing units.

This object is achieved by a Device with the features of the characteristic part of claim 1 solved.

In a particularly advantageous manner, a gripping and pressing device only has to travel a very small distance in order to get into a parking position or into a working position, which is very important for short plate changing times. If the gripping and pressing device is in the park position, good accessibility to the cylinder and to an associated inking unit is guaranteed. A manual plate change is thus possible at any time without the device according to the invention being impeded.
In the park position, the gripping and pressing device is enclosed by a protection and thus protected from dirt and paint mist, which increases functional reliability and minimizes maintenance.

The device according to the invention is in the drawing shown and is described in more detail below.

Fig. 1

eine schematische Darstellung in Draufsicht der erfindungsgemäßen Vorrichtung,

Fig. 2

eine schematische Darstellung einer Greif- und Andrückeinrichtung der erfindungsgemäßen Vorrichtung aus Fig. 1,

Fig. 3 bis Fig. 11

schematische Seitenansichten der erfindungsgemäßen Vorrichtung mit zugehörigen Zylinder und Bereitstellungseinrichtungen in verschiedenen Arbeitsstellungen,

Fig. 12

einen schematischen Schnitt durch einen Verschluß des Zylinders.

Show it

Fig. 1

2 shows a schematic illustration in plan view of the device according to the invention,

Fig. 2

2 shows a schematic illustration of a gripping and pressing device of the device according to the invention from FIG. 1,

3 to 11

schematic side views of the device according to the invention with associated cylinders and supply devices in different working positions,

Fig. 12

a schematic section through a closure of the cylinder.

1 shows a cylinder 1 of a rotary printing press with easily bendable, arcuate objects 2, preferably printing plates 2.
On each easily bendable, arc-shaped object 2, front and rear hooking folds 3, 4 are arranged at the opposite ends thereof, the respective legs 6, 7 of which enclose an opening angle Alpha less than 90 °. These hook-in folds 3, 4 are designed to be dimensionally stable, ie when the objects 2 are clamped on the cylinder 1, these hook-in folds 3, 4 are not bent open. This object 2 designed in this way can also consist of printing rubber blankets which are provided with hooked-in folds 3, 4.
These dimensionally stable hook-in folds 3, 4 of the printing rubber blankets can be folded ends of a metal plate on which the printing rubber blanket has been firmly bonded, for example glued or vulcanized. In particular, the fabric inserts of the printing rubber blanket can be made of CFRP (carbon fiber reinforced plastic) or GRP (glass fiber reinforced plastic) and the hooked-in folds 3, 4 can be formed therefrom. To simplify matters, this described object is called pressure plate 2 in the following.

The cylinder 1 of the rotary printing press, which is mounted in two side frames 8, 9, is associated with an inking unit protection 11 which is close to the cylinder and is designed as a first printing plate preparation device 12.
This pressure plate supply device 12 has an upper and a lower, the upper opposite wall 13, 14, which together form a shaft 16. At one end 17 of the upper wall 13 pointing in the direction of the cylinder 1 there is a hooking strip 19 with a nose-shaped cross section that extends across the width of the cylinder 1 and runs parallel to an axis of rotation 18 of the cylinder 1. The end 17 of the upper wall 13 pointing in the direction of the cylinder 1 is formed approximately parallel to a tangent 21, which is determined by a cylindrical jacket surface 22 of the cylinder 1 and the hanging bar 19 of the printing plate preparation device 12.

In addition to the first printing plate preparation device 12 can, as in the present example, a second one Printing plate supply device 23 arranged be the end 24 pointing in the direction of the cylinder 1 also with a hanging bar 26 with nose-shaped Cross section is provided and approximately parallel to that of the cylindrical surface 22 of the cylinder 1 and the Hanging rails 19 of the first Printing plate supply device 12 set Iangente 21 is formed.

Above and parallel to this tangent 21 is in the Side frames 8, 9 one on the right and one on the left Linear drive 27, 28 attached, for example each from threaded spindles 29, 31 which are rotatable in trestles 32, 33, 34, 36 are mounted on the frame, consists. Other known linear drives can also be used 27, 28 such as e.g. B. belt or chain drives, Rack and pinion drives, hydraulic or pneumatic Servo cylinders or linear motors can be used. over a strap 37, e.g. B. timing belt, the right and left threaded spindle 29, 31 mechanically synchronized, becomes a synchronous by a drive 38 Rotary movement of the threaded spindles 29, 31 generated. This Synchronization can also be done mechanically, for example via chain or cardan shafts or electronically via two separate drives 38 of the linear drives 27, 28 respectively. Move the two threaded spindles 29, 31 one parallel to the axis of rotation 18 of the cylinder 1 Traverse 39 in a transport level 41, the above and approximately parallel to the surface of the cylinder 22 of the cylinder 1 and hanger 19 of the Determine printing plate supply device 12 Tangent 21 lies. At the two ends of this traverse 39 threaded nuts 42 are arranged so that the traverse 39 at right angles to the threaded spindles 29, 31 is in operative connection. Along this traverse 39 is at least one gripping and pressing device 43, in the example shown are four gripping and Pressure devices 43 attached.

Each one, an axial cylinder section associated printing plate 2 is an independent operable gripping and pressing device 43 assigned. It is also possible with an additional one Linear drive through which a single gripping and Pressure device 43 an axial movement along the Traverse 39 executes, several along the cylinder 1 arranged pressure plates 2 with only a single gripping and Pressure device 43 to change.

The elements of a gripping and pressing device 43 are shown in FIG. 2:
A gripping and pressing device 43 consists of at least one gripper unit 44 and at least one pressure roller 46. This gripper unit 44 and the pressure rollers 46 are independent of the cylinder 1 in the radial direction "D", the gripper unit 44 also in the axial direction "C" displaceable from one another by positioning devices.

In the present example, the gripping and pressing device 43 is constructed approximately symmetrically to the center line of the pressure plate 2 running in the cylinder circumferential direction:
Each gripping and pressing device 43 is a gripper unit 44 in the form of z. B. two suction strips 47 are formed which are perpendicular to a guide bar 48 against rotation tangential direction "B" of the cylinder 1 and are pressed by compression springs 49 in the direction "B" against a stop 51.

These guide strips 48 are on another Guide bar 52 attached and by one Pneumatic cylinder 53 against direction "C" slidable. A pneumatic cylinder 54 causes one Change in position of the guide bar 52 with the Squeegees 47 along the direction "D". In addition to the Suction strips 47 are each a pressure roller 46 opposed by a pneumatic cylinder 56 Direction "D" to be placed on the pressure plate 2 can.

In the present example, the cylinder 1 in the axial direction, parallel to the axis of rotation 18 of the Cylinder 1 trending, four closures 57, 58, 59, 61 arranged. The length of the closures 57, 58, 59, 61 is approximately half the cylinder length. These closures 57, 58, 59, 61 are open again Plate width divided (i.e. per closure 57, 58, 59, 61 two pressure plates 2 are provided) and are both within this subdivision as well can be operated independently of one another. The closures 57, 58 are in the circumferential direction of the cylinder 1 by about 90 ° offset from each other. Each shutter 57, 58 is each a closure 59, 61 assigned opposite.

The operation of the closures 57, 58, 59, 61 is explained in more detail below on the closure 57 (FIG. 12):
The closure 57 is arranged in a cylinder groove 62 running parallel to the axis of rotation 18. The cylinder pit 62 is delimited below the cylinder jacket surface 22 in each case by a front and rear suspension strip 63, 64 with a nose-shaped cross section on the cylinder 1. The closure 57 has a right and left clamping flap 66, 67. Each of these clamping flaps 66, 67 extends in the axial direction along the axis of rotation 18 of the cylinder 1 over approximately the width of the plate. The cross section of the two flaps 66, 67 is formed at a lower end 68 in the form of a circular arc as a bearing point, whereupon a lever 69 continues, which ends in a hook-shaped nose 71. When the tensioning flaps 66, 67 are open, their lugs 71 are located below the cylindrical surface 22 and their sides 72 facing the hanging strips 63, 64 of the cylinder 1 are correspondingly beveled to the hanging strips 63, 64 of the cylinder 1, so that the tensioning flaps 66, 67 in opened state are essentially covered by the hanging strips 63, 64.

A side 73 of the nose 71 of the tensioning flap 66 facing the hooked-in bend 4 of the pressure plate 2 runs approximately parallel to the hooked-in bend 3 of the pressure plate 2 when the tensioning flap 67 is in the tensioned state 62 pivoted. Due to the action of springs 76, the tensioning flap 67 pivots in the direction of the tensioning, rear hook-in bend 4 of the pressure plate 2. In the present example, the arcuate end 68 of the tensioning flap 67 is provided with a bore 77, in which a rod-shaped torsion spring (torsion bar spring) 76 runs. This torsion bar spring 76 is rigidly and prestressed at one end to the cylinder 1, while its second end is fixed to one end of the tensioning flap 67.
As in the example described, this tensioning flap 67 can be arranged axially symmetrically with respect to a center line 78 opposite a further tensioning flap 66 (which can also be produced in the opposite direction of rotation of the cylinder 1) or only one filler can be used. Between these two tension flaps 66, 67 or a filler, a device is attached which generates a force acting on the levers 69 of the two tension flaps 66, 67. In the present example, an inextensible, inflatable tube 79 is arranged between the two tensioning flaps.
When the tension flaps 66, 67 are closed, that is to say when the pressure plate 2 is tensioned, this hose 79 is pressed flat between the tension flaps 66, 67. If, for example, compressed air is applied to this hose 79, it generates a force acting against the torsion bar spring 76 by changing the shape of the hose 79 on the levers 69 of the tensioning flaps 66, 67, and these thereby pivot in the direction of the mounting strips 63, 64 of the cylinder 1, whereby the closure 57 opens and the mounting edge 4 of the pressure plate 2 is free.

The changing process of a printing plate 2 is explained in more detail with reference to FIGS. 2 to 11:
The traverse 39 with the gripping and pressing device 43 is moved by the two linear drives 27, 28 from a parking position into its unclamping position, while the cylinder 1 rotates into its unclamping position. The unclamping position of the crossmember 39 is determined in that the crossmember 39 stands approximately on or shortly next to a solder 81 which has fallen onto the threaded spindles 29, 31 of the linear units 27, 28 from the axis of rotation 18 of the cylinder 1. Thus, in this unclamping position, the pressure rollers 46 later placed on the printing plate 2 determine a detachment point 82 of the printing plate from the cylinder 1 in such a way that a tangent 83 applied in the detachment point 82, ie the printing plate 2, opens into the shaft 16 of the printing plate preparation device 12. The unclamping position of the cylinder 1 is determined in that the solder 81 described forms an angle of approximately 10 ° against the production direction with a connecting line formed by a center line 78 of the closure 57 and the axis of rotation 18. The parking position of the traverse 39 with the gripping and pressing device 43 is located in the transport plane 41 in the plate feed direction A at least as far behind the solder 81 which has fallen from the axis of rotation 18 of the cylinder 1 onto the threaded spindles 29, 31, so that manual printing plate changes are carried out, for example can, e.g. B. approx. 100 mm - 200 mm. The parking position is thus outside the plate transport path. The two pressure rollers 46 are pressed by the pneumatic cylinders 56 onto the detachment point 82 of the pressure plate 2 in order to prevent the pressure plate 2 from slipping on the cylinder 1. Thereupon a closure 57 of the cylinder 1 opens and the cylinder 1 begins to rotate counter to the production direction "P" (FIG. 3). Due to the inherent rigidity of the pressure plate 2, it springs out of the closure 57, which closes again after a rotary movement of the cylinder 1 of approximately 10 °.

During the rotary movement of the cylinder 1, the Pressure plate 2 frictionally by the force the pressure rollers 46 guided on the cylinder 1 and the pressure plate end thus enters the shaft 16 of the Inking unit protection 11. Approx. 10 ° - 30 ° before the front one Hanging bar 63 of the cylinder 1, the pressure rollers 46 reached, the cylinder 1 (Fig. 4) stops, and the Pressure plate 2 is in the shaft 16 by a fixture shown fixed. Then the turns Cylinder 1 at least as far against the direction of production "P", whereby the pressure plate 2 on the cylinder 1 is moved until the pressure plate is under internal tension 2 springs out of the hanging bar 63 (Fig. 5). The Pressure rollers 46 are actuated by means of the pneumatic cylinders 56 turned off from cylinder 1.

Then a not shown Device in the shaft 16, the pressure plate 2 from the cylinder 1 removed and completely transported into the shaft 16.

To clamp a new pressure plate 84, the Cylinder 1 in a clamping position, which thereby it is determined that the center line 78 of the closure 59 approximately congruent with that of the axis of rotation 18th on the perpendicular to the direction of movement of the Linear drives 27, 28 precipitated solder 81. The traverse 39 is by means of the two linear drives 27, 28 in Position for receiving the new pressure plate 84, d. H. The suction strips 47 are in the area of Direction of the cylinder 1 facing end 17 of the Printing plate supply device 12. By The pneumatic cylinder 53 is ventilated Gripper unit 44 moved in the opposite direction "C".

The new pressure plate 84 to be applied was on the top wall 13 and on the hanging bar 19 of the Printing plate supply device 12 pre-positioned.

The suction strips 47 are by venting the Pneumatic cylinder 54 to the level of the pressure plate 84 lowered and charged with suction air (Fig. 6). This causes the printing plate 84 to be printing Side fixed to the gripping and pressing device 43. The traverse 39 is now moved in the direction of cylinder 1 and after about 10 mm are covered the pneumatic cylinder 54, the suction strips 47 with the sucked pressure plate 84 raised.

The traverse 39 with gripping and pressing device 43 conveys the pressure plate 84 towards the front Hanging bar 63 of the cylinder 1 to the front Insert folding 3 of the pressure plate 84 with the Hanging bar 63 of cylinder 1 a gap "s" forms so that the gripper unit 44 with the suction strips 47 the pressure plate 84 through the pneumatic cylinder 54 can lower on the cylinder surface 22 (Fig. 7). This gap s is approximately 2 mm to 5 mm.

After lowering the pressure plate 84 move the Linear drives 27, 28 the gripping and pressing device 43 opposite direction "A" to the front Hook-in bend 3 of the pressure plate 84 on the Hanging bar 63 of the cylinder 1 lies exactly and the Squeegees 47 against the direction "B" by means of Compression springs 49, the pressure plate 84 with a defined force preload (Fig. 8).

Then the pressure plate 84 is held by the Suction strips 47, by actuating the pneumatic cylinder 53 with a fixed force, for example sprung, to a respective side register stop 86 axially, parallel to an axis of rotation 18 of the cylinder 1 positioned so that the pressure plate 84 securely on Side register stop 86 is applied, but not deformed becomes. The spring force for positioning the pressure plate 84 can, for example, by the spring of a simple acting pneumatic cylinder 53 or by air pressure (e.g. adjustable via pressure regulator) one double acting pneumatic cylinders are generated. The Side register stops 86 are on the hanging bar 63 of the cylinder 1 below the cylinder surface 22 arranged in a cylinder. In the example shown there is a common page register stop 86 on a left or right side edge of the pressure plate 84 associated with each cylinder section. The described mode of operation of the pneumatic cylinder 53 hits for the arrangement of the side register stop 86 on the left side edge, d. H. towards C, to, at Arrangement of the side register stop 86 on the right The side edge of the pneumatic cylinder 53 must be opposite Act.

Then the two pressure rollers 46 by means of the corresponding pneumatic cylinder 56 on the Pressure plate 84 lowered. The suction air of the squeegees 47 is turned off and by loading the Pneumatic cylinders 54 with compressed air are the Squeegees 47 raised in the "D" direction (Fig. 9).

The cylinder 1 then rotates in the production direction "P" until the pressure rollers 46 approx. 10 ° - 20 ° in front of the rear one Hang-up bend 4 of the pressure plate 84 stand on what the shutter 57 opens (Fig. 10). Then turns cylinder 1 approx. 5 ° - 10 ° in the production direction "P", and by closing the shutter 57 the Pressure plate 84 clamped on the cylinder 1. The Pressure rollers 46 are raised and the cross member 39 with the gripping and pressing device 43 moves into the Parking position. There the pneumatic cylinder 54 vented and the gripper unit 44 lowered (Fig. 11). In this parking position the gripping and Pressing device 43 of at least 3 sides enclosed protection 87 surrounded and is there from dirt and color protected.

Alternatively, another plate change in the described manner can be made. For this is the second printing plate supply device 23 next to the first printing plate supply device 12 arranged so that this also in the direction of the cylinder 1st pointing end 24 of the Printing plate supply device 23 for support a second, new pressure plate 88 approximately parallel to the tangent 21 of the cylindrical surface 22 is.

The shaft 16 of the first provision device 12 receives a second, used printing plate 2 in accordance with the described first disassembly process.
To assemble the second, new pressure plate 88, it is pre-positioned on the second provision device 23 and the assembly process is carried out appropriately for the first.

Parts list

1

cylinder

2nd

Pressure plate (bendable, arched object)

3rd

Hook-in bend, front (2)

4th

Insert folding, rear (2)

5

-

6

leg

7

leg

8th

Right side frame

9

Side frame, left

10th

-

11

Inking unit protection

12th

Printing plate preparation device, first

13

Wall, upper (12)

14

Wall lower (12)

15

-

16

Shaft (12)

17th

End (13), pointing in the direction of the cylinder (1)

18th

Axis of rotation (1)

19th

Hanging rails (12)

20th

-

21

tangent (1, 12)

22

Cylinder surface (1)

23

Printing plate preparation device, second

24th

End (23), pointing in the direction of the cylinder (1)

25th

-

26

Hanging rails (23)

27

Linear drive, right

28

Linear drive, left

29

Lead screw, right (27)

30th

-

31

Threaded spindle, left (28)

32

Buck

33

Buck

34

Buck

35

-

36

Buck

37

belt

38

drive

39

traverse

40

-

41

Transport level

42

Threaded nut (39)

43

Gripping and pressing device

44

Gripper unit (43)

45

-

46

Pressure roller (43)

47

Suction strips (44)

48

Guide bar (44)

49

Compression spring (44)

50

-

51

attack (44)

52

Guide bar (44)

53

Pneumatic cylinder (48, 52)

54

Pneumatic cylinder (47)

55

-

56

Pneumatic cylinder (46)

57

Closure (1)

58

Closure (1)

59

Closure (1)

60

-

61

Closure (1)

62

Cylinder pit (1)

63

Hanging rails, front (1)

64

Hanging rails, rear (1)

65

-

66

Flap, right

67

Tension flap, left

68

End, arcuate (66, 67)

69

Lever (66, 67)

70

-

71

nose (66, 67)

72

Page (71)

73

Page (71)

74

Recess, circular arc

75

-

76

Torsion bar spring

77

drilling

78

Center line

79

tube

80

-

81

Lot (18, 29; 31)

82

Release point

83

Tangent (82, 16)

84

Pressure plate, new, first

85

-

86

Side register stop

87

protection

88

Printing plate, new, second

A

direction

B

direction

C.

direction

D

direction

P

Production direction

s

gap

alpha

Opening angle of the hooked edge of the printing plate

Claims (2)

1. Apparatus for the mounting, dismounting and transporting of a readily bendable, arcuate object (2; 84; 88), preferably of a printing plate (2; 84; 88), with a front and rear dimensionally stable bent-off attachment edge (3; 4) which is resistant to being bent up and whose respective legs (6; 7) include an opening angle (alpha) smaller [lacuna] 90°, on and from a cylinder (1) of a rotary printing machine, which cylinder has at least one attachment strip (63; 64) with a nose-shaped cross-section, and a locking mechanism (57; 58; 59; 61) which engages in the rear bent-off attachment edge (4) of the printing plate (2; 84; 88) and possesses pivotable, spring-loaded clamping flaps (66; 67), characterized in that a gripping and pressing-on device (43) for a printing plate (2; 84; 88) to be taken off or put on is arranged such that it can be positioned or moved into a defined parked position adjacent to an unclamping position by means of linear drives (27; 28), and in that this parked position is situated in an extension of the linear drives (27; 28) in the production direction (P) beyond an unclamping position defined by a perpendicular (81) drawn from an axis of rotation (18) of the cylinder (1) onto the threaded spindles (29; 31) of the linear drives (27; 28).
2. Apparatus according to Claim 1, characterized in that, in the parked position adjacent to the unclamping position, the gripping and pressing-on device (43) is surrounded by a guard (87) closed on at least 3 sides.

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