EP0810175B1 - Device for pre-stressing a torque applying mechanism on a folding cylindre - Google Patents

Description

The present invention relates to a device for fast and accurate Biasing a tensioning mechanism on a folding cylinder and in particular on Folding cylinders with a large number of torsion bars distributed over their outer surface.

US 2,991,072 describes a folding jaw cylinder in one Web-fed rotary printing press, in which a movable folding flap is opened over one a cam roller running cam roller is actuated via a shaft, a Torsion bar and sawtooth couplings on the movable jaw act to close it open and close. The torsion bar generates a resilient force that the jaw flap pushes against an elastic stop. The cam roller is used in the described device not by the torsion bar, but by a Spiral compression spring attached to the control cam, which is attached to the shaft Projection attacks.

GB 1 542 554 discloses a folding cylinder for rotary printing presses in which two are discs mounted on an axle form a stable axle body, in which jaws are attached. The jaws are opened by a spindle and a lever a cam roller moving cam actuated.

GB 1 569 545 discloses a web-fed rotary printing press with at least one assigned flap folding unit, from simple production to collective production and can be reversed. Sitting on the body of the jaw cylinder Compression springs hold control rollers on the surface of a cam that is attached to the Side frame is attached. The folding elements are shown on the control curve activated roles.

US 4,381,106 discloses a collecting cylinder in a rotary folding machine which has at least five gripper devices and an equal number of folding devices, which by fixed cams, which optionally by simultaneously with the Cylinder axis rotating cover cams are covered, controlled. The cover cam disks are driven by the main cylinder drive, by means of a translation that can be adjusted in order to Gear ratio of the cover cam to the collecting cylinder and the Cover cam phase to change relative to the gripper device and thus the Operating modes non-collecting, double-collecting, triple-collecting and partial-collecting to be carried out without the gripping surface of the fixed gripper cam cover constantly during the gripping phase of a respective gripper device have to.

US 4,892,036 discloses a combination of a collecting and folding cylinder device. For a central control of the adjustment of folding knives and pin needles on one The control cams enable the combination of collecting and folding cylinders rotatable cam cover plates assigned by the machine main drive, for. B. are driven by a drive wheel connected to the cylinder. By a additional overlapping rotary movement is the adjustment of the cover plates and thus the choice of different modes of operation, e.g. B. Collecting or not collecting sheet products placed one after the other on the cylinder. The Arrangement for a superimposed rotary movement comprises a hollow engagement device, which is coupled to an associated worm gear, with axially adjustable Engage the bolts in the worm gear and the axial position of the bolts by a electric servomotor, by rotating an adjusting spindle over a Adjustable plate, can be controlled.

In the large folding cylinders or folders, such as. B. the collecting cylinders, Transfer cylinders, folding knife cylinders and folding jaw cylinders of the prior art Technology has proven difficult to rely on torsion bars for folding knives, grippers, Point waves, etc. to apply a torque preload.

In the existing tensioning devices for torsion bars, collar structures are used used that do not give up their clamping force completely due to internal friction, so that some of the torque preload even in an untensioned state of a torsion bar remains on the torsion bar. Then if the torsion bar again with a Torque preload is applied due to internal friction currently used collar construction an inaccurate adjustment of the torque preload. As a result, this is necessary for overcoming the friction Torque varies from torsion bar center to torsion bar center around the cylinder. The torque applied to the torsion bar to this must be higher than the torque desired on the cam follower to reduce the internal friction of the Overcoming collar construction. After the torsion bar with the preload acted upon and the tension of the torsion bar to maintain the prestressed Torque is set, the torque at the other end of the torsion bar, i. H. on the drive side of the folding cylinder, its torsion bars at this time be biased, controlled. If the measured bias is unacceptable the collar must be loosened and the process repeated. Hence the preload of torque on the torsion bar is a time-consuming and tedious process.

Large diameter folding cylinders, e.g. B. folding knife cylinder, can be up to seven Have gripper bridges and seven folding knives assigned to the folding cylinder circumference. This results in fourteen torsion bars that have to be prestressed. equally jaw cylinders can have up to seven movable jaws. So is this time consuming torque preload and control process is an obstacle to fast Assembly and maintenance of folders.

According to the present invention, a cylinder in a folder comprises a plurality of product gripping devices, each with a control curve and a shaft with a Have a variety of product gripping devices attached to it. On the wave a cam roller attached and with this in turn a torsion bar is connected. It a torque biasing element is provided, through which a torque biasing is applied to a torsion bar that the cam roller is in contact with the curve stops. Finally, a mechanism is provided which provides a minute, i.e. H. Pre-setting of the torque preload that can be determined in a fine-tuning enables and maintains the preloaded torque on the torsion bar. Various such mechanisms for minute presetting and maintenance a torque preload are conceivable. There can also be separate mechanisms for the presetting and maintenance of the preloaded torque is used become.

According to a first embodiment of the present invention, the Mechanism for minute presetting and for maintaining the torque preload a first end toothing on the inner end face of the torque biasing element and a second face toothing on the outer face of one opposite element. The opposite element is on the operator side End of the cylinder attached, and the first end toothing engages in the second front toothing. The torque preload applied to the torsion bar is caused by a relative movement between the first and the second face gearing set minute.

According to a second embodiment of the present invention, the Mechanism for minute presetting and maintenance Torque preload is a ratchet wheel attached to the torsion bar with a outer circumferential toothing. A pawl engages one or more teeth of the Ratchet wheel, and there is a minute presetting on the torsion bar applied torque bias by the relative movement between the outer circumferential toothing and the pawl.

According to a third embodiment of the present invention, the Mechanism for minute adjustment and maintenance of the torque preload one attached to the operator end of the torsion bar Adjusting element, an eccentric and a locking lever. The actuator has one radially extending arm. The locking lever engages with its first end in an outer End of the radially extending arm and with its second end this is with in contact with the eccentric. The movement of the eccentric causes a minute adjustment the torque preload on the torsion bar by changing the position of the radially extending arm.

According to the present invention, the torque bias on the Torsion bar can be fine-tuned. It has z. B. pointed out that in the first and second embodiment, the tooth pitch of the toothing can be set so that a torque bias change of +/- 6.775 Nm (5 ft lbs) per tooth is achievable. By accurately adjusting the torque preload, a premature wear of cam rollers and bearings due to too high or too low torque preload can be prevented. Because a predetermined one Torque applied in a very precisely defined and narrow area, can be maintained and regulated, so the operator is now able to minute Make adjustments instead of essentially zeroing the torque again to have to muster. The minute setting of the torque also allows one Fine-tune the torque on each torsion bar so that it stays the same Torque settings from one torsion bar to another around the cylinder can be achieved.

Because there are also torque tolerance ranges for high-speed operation are crucial, enables the precise achieved with the present invention Setting the torque to operate folders with extremely high Speeds, e.g. B. up to 914.4 m per minute (3000 feet / min).

The above and other features of the present invention are set forth in the following description of preferred embodiments in connection with the attached drawings explained below.

Fig. 1

eine Seitenansicht eines Falzapparates gemäß vorliegender Erfindung mit einer sich vor einem Falzbereich befindlichen Produktgreifeinrichtung;

Fig. 2a

eine Teilansicht des Endes eines Falzklappenzylinders;

Fig. 2b und 2c

eine Ansicht des in den Seitenrahmen eines Falzapparates gelagerten Falzklappenzylinders der Fig. 2a;

Fig. 3a und 3b

eine Darstellung eines ersten Ausführungsbeispiels einer Einstelleinrichtung zum Aufbringen eines vorbestimmten Drehmoments auf einen Torsionsstab, der eine stirnseitige Verzahnung aufweist;

Fig. 4a und 4b

eine Darstellung eines zweiten Ausführungsbeispiels einer Einstelleinrichtung zum Aufbringen eines bestimmten Drehmoments auf einen Torsionsstab, der ein Klinkenrad aufweist;

Fig. 5a und 5b

eine Darstellung eines dritten Ausführungsbeispiels einer Einstelleinrichtung zum Aufbringen eines bestimmten Drehmoments auf einen Torsionsstab, die einen Sperrhebel aufweist;

Fig. 6

eine Darstellung eines vierten Ausführungsbeispiels einer auf einer rechteckigen Platte angebrachten Einstelleinrichtung, die mittels Hebeschrauben bewegbar ist;

Fig. 7

eine Darstellung eines fünften Ausführungsbeispiels einer auf einer bogenförmigen Platte angebrachten Einstelleinrichtung, die mittels Hebeschrauben bewegbar ist;

Fig. 8a und 8b

Eine Darstellung der in den Figuren 4a und 4b gezeigten Einstelleinrichtung, worin auf einer Falzklappenwelle eines Falzzylinders des Falzapparats ein Klinkenrad angebracht ist.

Show it

Fig. 1

a side view of a folding apparatus according to the present invention with a product gripping device located in front of a folding area;

Fig. 2a

a partial view of the end of a jaw cylinder;

2b and 2c

a view of the folding cylinder mounted in the side frame of a folder of FIG. 2a;

3a and 3b

a representation of a first embodiment of an adjusting device for applying a predetermined torque to a torsion bar, which has an end toothing;

4a and 4b

a representation of a second embodiment of an adjusting device for applying a certain torque to a torsion bar having a ratchet wheel;

5a and 5b

a representation of a third embodiment of an adjusting device for applying a certain torque to a torsion bar, which has a locking lever;

Fig. 6

a representation of a fourth embodiment of an adjusting device mounted on a rectangular plate, which is movable by means of lifting screws;

Fig. 7

a representation of a fifth embodiment of an adjusting device mounted on an arcuate plate, which is movable by means of lifting screws;

8a and 8b

An illustration of the adjusting device shown in FIGS. 4a and 4b, in which a ratchet wheel is attached to a folding jaw shaft of a folding cylinder of the folding apparatus.

Figures 1 and 2a show a folder in which the present invention can be used. Fig. 1 shows a side view of the folder with folding cylinders to transport a large number of copies at the same time. after the Print products are cut off from a material web by a pair of cutting cylinders 2 were, they move between a set of first conveyor belts 4 and a set second conveyor belts 5. The set of first conveyor belts 4 is 8 over a number of rollers partially guided around the circumference of the product-carrying cylinder 7. to Maintaining a biased condition in the first and second Conveyor belts 4, 5 each set of belts has a tensioning mechanism 6 of conventional construction. The products are created by the set of first conveyor belts 4 held on the circumference of a product-carrying cylinder 7 and by itself on the Scope of the product-carrying cylinder 7 located, but not shown Gripping elements gripped. Folding knife (not shown) on the product-carrying cylinder cooperate with jaws 16 on the jaw cylinder 11 to print the products in to transfer a transfer area 10 to the jaw cylinder 11. The Gripping elements, folding knives and folding flaps are provided by respective cam rollers held by prestressed torsion bars on the surface of the respective control cam are activated. It goes without saying that, although in Fig. 1 a transfer cylinder and a jaw cylinder are shown, other applications of the invention are also conceivable are.

A folding jaw cylinder 11 is located on the product-carrying cylinder 7 Folders 16 located on the surface 18 of the jaw cylinder 11 are not shown in detail. Each jaw 16 has movable flaps (not shown) that can be activated by cam rollers 19. The cam rollers 19 are on Torsion bars 20 applied torque preload on the surface of the Control curve held.

2a shows a partial side view of the cylinder 11 in detail. The surface 18 of the Cylinder 11 has circumferentially extending grooves 15. There are seven rows of Folding flaps 16 are arranged around the circumference 18 of the cylinder (11). Each jaw 16 consists of a set of immovable flaps 24 and a set of movable Flaps 25. Each set of movable flaps 25 is activated by a cam roller 19. The surface of the cam roller 19 moves on a cam surface 23 Control cam 22. The cam roller 19 is moved by a movable flap 25th assigned torsion bar 20 driven on the cam surface 23 of the cam 22. This Torsion prevents the cam roller 19 from lifting off from the cam surface 23, which by the strong centrifugal forces generated by the rotating cylinder 11 could. The torque preload applied to the torsion bar 20 is determined by transfer an arm 21 to the cam roller 19. The amount of torsion bar 20 applied torque bias is preferably low enough to provide a Prevent premature wear of bearings and cam followers and high enough to prevent the cam rollers 19 from lifting off at high speeds. In the in 2a usually varies the construction on the torsion bar 20 applied torque bias z. B. between 115 Nm (85 ft lbs) and 128 Nm (95 ft lbs) for each torsion bar 20 associated with cylinder 11. Cylinder 11 rotates around an axis 27 in a direction 29. The cylinder 11 comprises one of the bearings each set of movable jaws 25 associated oil supply line 26. Although the above the exemplary embodiment described is shown in the form of a folding jaw cylinder, can of course also the folding flaps 24, 25 of FIG. 2a by folding knives, Gripping elements or pin needles can be replaced.

Figures 2b and 2c show a longitudinal section of the cylinder 11 with a Prior art torque application mechanism 470 that includes a first hexagonal element 72 and a collar 74. The cylinder 11 is in respective Bearings 32, 33 stored in the operator-side and drive-side frame 31, 30. The Bearings 32, 33 are located on the axis of rotation 27. One connected to an oil supply line 26 Oil distributor 34 keeps the bearings in cylinder 11 lubricated. On the drive side A control cam 22 is arranged in the frame 30 and is fastened in a frame. The Control cam 22 has a cam surface 23 for guiding cam roller 19. The sentence movable jaws 25 is arranged on a shaft which in the outer circumference of the Folding jaw cylinder 11 is mounted. A torsion bar 20 extends from the gear-side end of the cylinder (i.e., the gear-side frame 30 on nearest cylinder end) to the operator end of the cylinder. A first one hexagonal element 72 for applying a torque bias is on the operator end and a second hexagonal element 73 to control a Torque preload is at the gear end of the torsion bar 20 appropriate. A collar 74 is located on the operator end of the cylinder 11. In order to prestress a torque to be applied to the torsion bar 20, a Torque wrench used with which a predetermined torque on the first hexagonal element 72 is applied. If the predetermined torque is reached, the collar 74 fixes the torsion bar 20 in its position. Then the Torque wrench attached to the second hexagonal member 73 to the Check torque on the transmission end of the torsion bar 20. If the torque on the gear end is incorrect, then the collar 74 and thus the torque stress on the torsion bar is released and the process must be repeated. However, in this construction, as mentioned above, the tension is of the torque on the torsion bar 20 is not fully released when the collar 74 is released is. This also changes for overcoming the internal friction of the collar required torque from torsion bar to torsion bar around the cylinder. In addition, the torque applied for pretensioning the torsion bar must be higher than the desired torque on the cam roller 19 to the internal friction of the Overcoming collar construction.

Figures 3a and 3b show an adjusting device 47 according to the first Embodiment of the present invention, with a front toothing 38 and 43 on components 28 and 35 to maintain torque bias. 3a shows a partial side view of a cylinder 11 Torsion bar 20 (e.g., a torque loading member) extends through the hollow interior of a shaft 42. In this construction, a number of folding blades are 25 (or jaws) arranged on the shaft 42. The torsion bar 20 is with a Torque biasing element 28 (e.g., a hexagonal part), which in a Torque wrench fits, provided. 3b is the torque biasing element 28 as shown sitting on the torsion bar 20. A bracket 36 and a bearing element 40 are z. B. attached to the cylinder 11 by means of screws. The bearing element 40 contains a bearing 39 in which the shaft 42 is received and thus within the Cylinder 11 can rotate freely. An annular element 35 is located on the bearing element 40 attached with front toothing 38. The torque biasing element 28 has also has an end toothing 43 and is located on the end part of the Torsion bar 20 as shown in Fig. 3b. By turning the torque biasing element 28 counter-clockwise via the front toothing 38 the torque of the torsion bar 20 is biased. In addition, the Tooth division of the front teeth 38, 43 a minute adjustment of the Torque preload on the torsion bar 20. If, for example, that Torque biasing element 28 with a key (or other suitable Object) is rotated around a tooth, an increase or reduction in the Torque on the torsion bar 20 of approximately +/- 6.775 Nm (5 ft lbs) can be achieved. This fine tooth pitch enables the operator to apply the torsion bar 20 applied torque by rotating element 28 clockwise or Slightly increase or decrease counter-clockwise. Surely they share Teeth 38, 43 during the preload adjustment far enough so that the Element 28 can rotate relative to element 35. The teeth 38, 43 are arranged such in that the element 28 is fixed in position after rotation of the Element 28 in the counterclockwise direction, the pretensioning of the torque has occurred.

The adjuster 47 replaces the prior art torque tensioning mechanism 470 of the technique. To apply a torque preload to the torsion bar 20 a torque wrench is used, with which the element 28 with a predetermined torque is applied. Then the torque wrench is on the second element 73 shown in Fig. 2c applied to the torque on the measure gear-side end of the torsion bar 20. If the torque is on the transmission end proves to be incorrect, then according to the present invention The torque can be fine-tuned by turning the element 28 tooth by tooth until the torque measured on the gearbox side is correct. Thus, unlike mechanism 470 of FIG. 2b, the torque on the Torsion bar 20 can be adjusted again by the adjusting device 47 without the to eliminate existing torque.

Figures 4a and 4b show an adjusting device 47 according to a second Embodiment of the present invention in which the biasing of a Torsion bar 20 is carried out by means of a ratchet wheel. 4a shows part of the end face a folding knife cylinder 11 (or folding jaw cylinder) with one of these end faces associated adjusting device 47. A ratchet wheel 48 with a circumferential Teeth (or partial teeth) is on the end part of the torsion bar 20 appropriate. The toothing preferably has a fine tooth pitch. A Spring-loaded rotatable pawl 49 is the toothing of the ratchet wheel 48 assigned. When the ratchet wheel 48 rotates counterclockwise, it engages Pawl 49 into one or more of the teeth of ratchet wheel 48. The ratchet wheel 48 can be by a key that is attached to the torque biasing element 28 be rotated. The element 28 is in turn on the end part of the torsion bar 20 attached. The tooth pitch of the ratchet wheel 48 allows a minute adjustment of the the torsion bar 20 torque to be applied. A contacting the pawl 49 Spring 50 is mounted in an annular element 45, which by means of Fastening elements 37 is fixed on the bearing element 40 and the holder 36. If So by turning the ratchet wheel 48 counterclockwise, the torque on the Torsion bar 20 is biased, turning the ratchet wheel 48 clockwise blocked by the pawl 49. Since the teeth 70 on the circumference of the ratchet 48 a has very fine tooth pitch, can be adjusted by turning the adjusting device 47 Pawl 48 counterclockwise tooth by tooth a very fine step Adjust the torque preload. It has z. B. proved that with This construction allows adjustment within a range of +/- 6.775 Nm (5 ft lbs) is. The pawl 49 has a release mechanism, not shown, so that the Pawl 48 can rotate clockwise by one or more teeth if that Torque is too high.

As shown in FIG. 4b, the torsion bar 20 extends on which the ratchet wheel 48 supports, through the hollow interior of the shaft 42. On the shaft 42 there are folding knives (or folding jaws). A bracket 36 is attached to the end face of the cylinder 11 '. Bearings 39 are located in a bearing housing 40, which in turn on the Bracket 36 is attached. The ratchet wheel 48 is one along its circumference surrounded annular element 45, which in turn is attached to the bearing housing 40. A plate 46 is secured to the annular member 45 by holders 37, the Outside of the ratchet wheel 48 is covered. The holders 37 extend further through the bearing housing 40 and in the bracket 36. Of course, as Alternative separate holders can be used to attach the cover plate 46 to the to attach annular element 45.

FIGS. 5a and 5b show a third exemplary embodiment of an adjusting device 47 according to the present invention. The torsion bar 20 is a folding knife cylinder 11 ' (or jaw cylinder) assigned. At the operator end of the Torsion bar 20, the torque biasing element 28 is attached. The Torsion bar 20 extends axially through shaft 42 as above with respect to FIG Figures 3 and 4 described. A disc-shaped element 51 with a radial extending arm 52 and a biasing member 28 is at the operator end of the torsion bar 20 attached. The arm 52 is in engagement with a locking lever 54, which is rotatably mounted on an eccentric 55. As above in connection with Fig. 4b described, a bracket 36 is attached to the end face of the cylinder 11 '. There are bearings 39 in a bearing housing 40, which in turn is attached to the holder 36 is appropriate. The shaft 42 is rotatably supported in the bearings 39. There are strips 56, 57 fastened by means of holder 37 to the bearing housing 40 and serve to guide the Movement of the rotatably mounted disc 51. As shown, the disc 51 has a annular surface, which is located inside the bearing housing 40.

As described above in connection with Figures 3 and 4, a torque can be biased on the torsion bar 20 by using a torque wrench on the Torque biasing element 28 is attached. Once the torque is biased is, the locking lever 54 is engaged with the arm 52. Then the torque can go through Adjusting the eccentric 55 can be finely adjusted as follows: The movement of the Eccentric 55 triggers a corresponding vertical movement of the locking lever 54 and this in turn adjusts the rotational position of the disk 51 via the arm 52. The Rotational movement of the disc 51 represents that to be applied to the torsion bar 20 Torque preload on. Once set, the torque can be eliminated, e.g. B. To perform maintenance on the cylinder, then the torque is applied again without readjusting the position of the eccentric become.

6 shows an adjusting device 61 according to a fourth exemplary embodiment of FIG present invention. In this example, the adjuster 61 includes one Plate 62, which can be moved in an arc 80 by means of lifting screws 69. The Sheet 80 can e.g. B. concentric with the fulcrum of the shaft 42 and / or the Torsion bar 20. The plate 62 is provided with elongated holes 67, in which bolts 68, which allow the plate 62 to move. A pawl 65 is attached to the plate 62 and engages when the ratchet wheel 66 rotates clockwise into one or more teeth 70 of ratchet wheel 66. Preferably, the Gearing on a fine tooth pitch. The ratchet wheel 66 is in turn on the Torsion bar 20 in the same manner as in connection with Figures 5a and 5b described, attached. The ratchet wheel 66 and the torsion bar 20 can be rotated by attaching a key to the torque biasing member 28. After the torque on the torsion bar 20 is biased, the rotation of the Pawl wheel 66 blocked by the pawl 65. The pawl is attached with a shoulder bolt attached and z. B. tensioned by a spring 64.

A is used to preload a torque to be applied to the torsion bar 20 Torque wrench used to apply a predetermined torque to element 28 to apply. Then the torque wrench on the second, not shown Element 73 attached to the torque on the transmission end of the To measure torsion bar 20, and if this torque proves to be incorrect, can according to the present invention fine-tuning the torque by turning of element 28 tooth 70 for tooth 70 until the one measured on the gear side Torque is correct. Even finer torque settings can be achieved by changing the position of the plate 62 by turning the lifting screws 69 becomes. Thus, rotary movements of the ratchet wheel 66 can be smaller than the tooth pitch the teeth 70 are achieved, so that the torque fluctuations less as z. B. +/- 6,775 Nm (5 ft lbs).

7 shows an adjusting device 61 according to a further exemplary embodiment of the Invention. In this example, the plate 62 is joined by an arcuate plate 62 ' Elongated holes 67 replaced. The bolts 68 screwed into the elongated holes 67 allow one Movement of the plate 62 'over the elongated holes 67 in an arc 80'. The pawl is 65 located approximately in the middle of the arcuate plate 62 '. The lifting screws 69 abut an arm 81 of the arcuate plate 62 'to change position of the arcuate plate 62 '.

FIGS. 8a and 8b show two views of an adjusting device according to present invention, which is attached to the operator-side end of a torsion bar are. The setting device 47 shown corresponds to the embodiment of FIG Figures 4a and 4b. For the sake of illustration, the spring-loaded pawl 49 and spring 50 not shown. However, the adjustment devices of the type shown in FIGS Figures 3, 5, 6 and 7 embodiments shown are applied.

The torsion bar 20 extends through the hollow interior of the shaft 42 and is through a set screw 41 connected to the torque biasing element 28. The shaft 42 is rotatably supported in bearings 39 and 60. Movable flaps 25 are through holders 85 connected to the shaft 42. When the shaft 42 rotates, the movable ones act Flaps 25 with respective fixed flaps on the surface 18 of the Jaw cylinder 11 together to grasp and release printed products. The Bearing 60 is lubricated by an oil supply line 26 to ensure smooth operation Maintain rolling contact of shaft 42. As above in connection with the 4a and 4b described, the torque biasing element 28 acts on it Pawl 48 with a torque. The ratchet wheel 48 is of a ring 45 and a plate 46 envelops. As shown in Fig. 4a, the ratchet 48 has an outer Toothing which engages in a pawl 49.

In order to pretension a torque to be applied to the torsion bar 20, using a predetermined torque is applied to the element 28 using a torque wrench. The application of a torque to the torsion bar 20 presses the cam roller 19 against the cam surface 23 of the control cam 22 Torque wrench the element 28 with a predetermined torque was applied, the torque wrench to the second shown in Fig. 8a Element 73 attached to the torque on the transmission end of the Measure torsion bar 20. If this torque proves to be incorrect, can according to the present invention by rotating the element 28 tooth by tooth one The torque is fine-tuned until the one measured on the transmission side Torque is correct.

LIST OF REFERENCES

1

folding

2

cutting cylinder

4

first conveyor belts

5

second conveyor belts

6

tensioning mechanism

7

product-carrying cylinder

8th

roll

10

Transfer area

11

jaw cylinder

15

Grooving of the jaw cylinder 11

16

jaws

18

Surface / peripheral surface of the jaw cylinder 11

19

follower

20

torsion bars

21

poor

22

cam

23

Curve surface 23

24

immovable flaps

25

movable flaps / folding knives

26

oil supply

27

axis of rotation

28

Torque preload element / hexagonal part

29

direction

30

drive side frame

31

operator-side frame

32

cylinder bearings

33

cylinder bearings

34

oil distributor

35

annular element

36

bracket

37

Fasteners, holders

38

Front toothing of the annular element 35

39

storage

40

Bearing element / bearing housing

41

screw

42

wave

43

end toothing of the element 28

45

ring-shaped element / ring

46

Plate / cover plate

47

adjustment

48

ratchet

49

pawl

50

feather

51

disc-shaped element

52

poor

54

locking lever

55

eccentric

56

strip

57

strip

60

storage

61

adjustment

62

Plate / arched plate

64

feather

65

pawl

66

ratchet

67

slots

68

bolt

69

jackscrews

70

Teeth of ratchet 48

72

first hexagonal element

73

second hexagonal element

74

collar

80

arc

81

Arm of the arcuate plate 62

85

holder

470

Drehmomentbeaufschlagungsmechanismus

Claims (17)

1. Cylinder in a folding apparatus including a plurality of product seizing devices, each product seizing device comprising the following features:

   a cam (22);

   a shaft (42) having a plurality of product seizing devices attached thereto and a cam follower (19) mounted to the shaft;

   a torsion bar (20) coupled to the cam follower (19);

   a torque preloading element (28) for applying a preloaded torque to the torsion bar (20), the preloaded torque maintaining the cam follower (19) in contact with the cam (22); and

   a mechanism (35, 38, 28, 43) for preadjusting determinable in a fine-tuning action and maintaining the preloaded torque on the torsion bar.
2. Cylinder as set forth in claim 1,
   characterized in that
   the mechanism (35, 38, 28, 43) is arranged on a work-side end of the cylinder (11).
3. Cylinder as set forth in claim 1,
   characterized in that
   the mechanism further comprises a first facial toothing on the interior face of the torque preloading element (28), the torque preloading element (28) connected to the torsion bar (20); and
   that the mechanism includes a second facial toothing on the exterior face of an opposing element, the first facial toothing engaging the second facial toothing, and the preloaded torque on the torsion bar being incrementally adjusted by relative movement between the first and second facial toothings.
4. Cylinder as set forth in claim 3,
   characterized in that
   the opposing element is mounted to the work-side end of the cylinder (11).
5. Cylinder as set forth in claim 1,
   characterized in that
   the mechanism further comprises a ratchet (48) having an outer circumferential toothing, the ratchet (48) mounted to the torsion bar (20);
   that a pawl engages one or more teeth of the ratchet, the preloaded torque on the torsion bar (20) being incrementally adjusted by relative movement between the outer circumferential toothing and the pawl.
6. Cylinder as set forth in claim 1,
   characterized in that
   the mechanism further comprises an adjustment device (47) attached to the work-side end of the torsion bar (20), the adjustment device having a radially extending arm (52), an eccentric (55) and a latch (54);
   a first end of said latch (54) being engageable with an outer end of the radially extending arm (52) and its second end engaged with the eccentric (55); and
   the preloaded torque on the torsion bar (20) being incrementally adjusted by movement of the eccentric (55) while the first end of the latch (54) engages the outer end of the radially extending arm (52).
7. Cylinder as set forth in claim 6,
   characterized in that
   the eccentric (55) is mounted to a work-side end of the cylinder (11).
8. Cylinder as set forth in claim 3,
   characterized in that
   the pitch of the toothing is set to provide preload torque variations of approximately +/- 5 ft. lbs. per tooth.
9. Cylinder as set forth in claim 5,
   characterized in that
   the pitch of the toothing is set to provide preload torque variations of approximately +/- 5 ft. lbs. per tooth.
10. Cylinder as set forth in claim 5,
    characterized in that
    the pawl (65) is pretensioned.
11. Cylinder as set forth in claim 5,
    characterized in that
    the ratchet (48) is pretensioned.
12. Cylinder as set forth in claim 6,
    characterized in that
    the adjustment device (47) is a disc shaped member having a radially extending arm (52).
13. Cylinder as set forth in claim 1,
    characterized in that
    the plurality of product seizing devices are tucking blades.
14. Cylinder as set forth in claim 1,
    characterized in that
    the plurality of product seizing devices are movable jaws.
15. Cylinder as set forth in claim 1,
    characterized in that
    the plurality of product seizing devices are gripper elements.
16. Cylinder as set forth in claim 4,
    characterized in that
    the pawl (65) is mounted to a movable mounting plate, the movable mounting plate being movable for adjusting the preloded torque on the torsion bar (20).
17. Cylinder as set forth in claim 1,
    characterized in that
    a torque measuring element is provided which is coupled to a gear side end of the torsion bar (20).

Images