EP1086916B1 - Bearing unit for draw rollers of material webs - Google Patents

Abstract

Bearing unit comprises a bearing plate (20) on which are mounted adjustable stops (30, 31) which enable adjustment of the moveable roller. The bearing plate rotates about a bearing foot (34) that is coaxial with the bearing fastening (21). A second bearing plate (15) has a tensioner (35) and a shock absorber (42) and houses the movable feeder roller. An Independent claim is made for a folding apparatus for use with material processing paths.

Description

The invention relates to a storage unit for draw rolls, which have a material web keep them tensioned along their path and, for example, the material web promote a folder.

US 5 738 620 relates to the storage of pre-folding and pinch rolls in one Folder. The rollers have identical diameters, with the roller pairs in the folding direction seen are arranged one behind the other. The roller arrangement is between two Side walls rotatably added. One of the pre-folding and one of the squeeze rollers are stationary and rotatable at their two ends in the side walls. The first pre-folding roller is rotatably supported at its ends, the bearing of which on the Arms are arranged side walls. On the bearings of the first pre-folding roller connecting arms are also included, on which the second squeeze roller is stored. The connecting arms are spring loaded perpendicular to the folding direction and employed at attacks. The stops are received in the side walls such that the two pre-folding and the two squeezing rollers do not touch. The corresponding Bearings are relieved. Lift the fold copies emerging from the pre-folding rollers the connecting arms from their stops and produce this movement a gap that depends on the thickness of the folded copy. So grasping the Copy relieved.

US 5 738 264 discloses a device with the aid of which tension rollers in the folder are automatic are adjustable. Opposing pull rollers, one of which is stationary, the other can be positioned relative to this, form between their respective lateral surfaces an adjustable gap. The gap can be adjusted by means of a set screw, which is by means of a Servo motor is driven, can be adjusted. The turns of the set screw will be measured by means of the potentiometer assigned to this. By means of a stop on the Adjusting screw the travel of the screw is limited. Using a spring, the Rollers placed against each other, but the spring also a stop of the movable Pull roller for the material web in case of overload. The relative movements are by means of a sensor of traversing screw and stop can be detected against each other, whereby by means of a programmable control system the signals from the sensors to control the Servomotors are used.

In the arrangement known from US Pat. No. 5,738,264, the operator must make one Entry required in order to automatically trigger a response from the sensor Adjust the gap widths between the surfaces of the pull rollers.

In further development of the prior art, the invention is based on the object the setting of webs engaging traction rollers independently of each other from the operator's intervention.

According to the invention, this object is achieved by the features of claim 1.

The advantages associated with the solution according to the invention are diverse in nature.

By permanently loading the end shield with an adjusting force a biasing element as well as by the connection with a damping element the movable roller during deflections - caused, for example, by the passage a thicker glued joint - back to its original position, without the intervention the printer needs; by the pull roll configuration according to the invention a lower sensitivity of the pair of pull rollers even with passages of impurities in the Draw roller gap reached. The web tension can be with the storage according to the invention of the movable pull rollers is better to keep constant, which is not least the accuracy of the register the cutting register benefits.

Furthermore, when using the solution according to the invention, there is no need for a manual one Fine adjustment by the printer more if the web grammage or the page assignment should change.

In an advantageous development of the idea on which the invention is based, the Positioning movement of the movable pull roller on the material web by a relative movement reached between a bearing foot and a bearing plate coaxial with this, wherein the relative movement can be predetermined by adjustable stops. By an between Bearing plate and bearing foot arranged actuator can be the pull rollers Imprint the bearing movement on the receiving end shields.

By connecting the end shield with an effective in both directions Damping element can also be used to build up vibrations on the end shield suppress its respective pivot point on the lower extension of the bearing plate, so that Maintain constant web tension when passing through defects in the material web and a vibration build-up triggered by the fault points of the movable No tension rollers. Fluctuations in the web tension are mostly with fluctuations connected in the cutting accuracy of the material webs on the pair of cutting cylinders. This causes fluctuations in the quality of the specimens to be separated from the material web itself, so that the maintenance of a constant web tension - even at Passages at imperfections such as the glue points - what is essential for them remains guaranteed Maintaining high product quality in the folder.

The contact force of the movable pull roller on the material web can be adjusted by means of a pretensioning element - Set approximately in the form of a coil spring, so that depending on the web thickness in the case of single-layer or multi-layer web strands, the optimum contact force can be set in each case is.

The bearing unit according to the invention can advantageously be turned on and off a movable draw roller in conventional folders as well as in use a folder that works without a point. The warranty is valid for both types of folder constant web tension for high product quality with high Cutting register accuracy is crucial.

The invention is explained in more detail below with reference to a drawing.

Fig. 1

zwei im Einlaufbereich eines Falzapparat Zylinderteils in Bahnlaufrichtung gesehen hintereinanderliegenden Zugwalzenpaare,

Fig. 2

die Seitenansicht einer Lagereinheit für eine bewegbare Zugwalze,

Fig. 3

eine perspektivische Ansicht einer Lagereinheit für eine bewegbare Zugwalze und

Fig. 4.1, 4.2

die abgestellte bzw. die angestellte Position der bewegbaren Zugwalze, die in einer erfindungsgemäßen Lagereinheit aufgenommen ist.

It shows:

Fig. 1

two pairs of draw rollers lying one behind the other in the infeed area of a folder cylinder part viewed in the direction of web travel,

Fig. 2

the side view of a bearing unit for a movable draw roller,

Fig. 3

a perspective view of a bearing unit for a movable draw roller and

Fig. 4.1, 4.2

the parked or the employed position of the movable draw roller, which is accommodated in a bearing unit according to the invention.

Fig. 1 shows a side wall 2 of a folder 1, in which a material web 3 in Web running direction 4 has run in. The material web 1 passes a first pair of draw rollers 5 consisting of a stationary roller 8 and a movable roller 10. The web of material 3 passes between the two outer surfaces 9 and 11 of the drawing rollers 8 and 10 adjusting gap and is driven because the pulling roller pairs 5 and 7 each are, so in the cylinder part - which is not shown here - of the folder 1 funded.

After the passage of the upper first pair of draw rollers 5, one or more layers pass Material web 3 a pair of perforating rollers 6 in which the material web 3 either along of their fold back on the 1st cross fold or also crosswise to the web direction 4 are perforated can - depending on the application.

The material web 3 then passes into a further, lower pair of drawing rollers 7, which is analogous to the first-mentioned pair of draw rollers 5. The only difference is that that the movable draw roller 10 in the first pair of draw rollers 5 at the top of the bearing unit is articulated while it is articulated in the lower pair of draw rollers 7 at the bottom of the bearing unit is.

Fig. 2 shows the side view of a storage unit according to the invention for on / off a movable pull roller.

Promote the two drawing rollers 8 and 10 rotating in the direction of web travel 4 in the direction of rotation 13 a material web 3 down. The movable pull roller 10 is 14 with its roll neck recorded in the eye of a bearing plate 15. The end shield 15 is in turn with his lower pivot point 17 on the extension 19 of the bearing plate 20 pivotally mounted. On the other hand, a damping element 42 is articulated in the articulation point 16 on the bearing plate 15, which in turn is supported on the bearing plate 20 of the bearing unit. There is also a pivot point 18 formed for a biasing element 35 on the bearing plate 15.

On a fastening 21, which, for example, differs from side wall 2 to side wall 2 of the folder 1 extending axis can be formed, the bearing base 34 is fixed. By means of a clamping screw 24 passing through a slot 22 in the bearing foot 34, the Bearing foot 34 on the attachment 21 - here preferably formed as an axis - jammed and held in rotation. Located on the bearing foot 34, which is stationary on the axis 21 there is a stop 31, which in the illustrated embodiment is entirely in a threaded bore of the base 34 is screwed. It is also located in the upper area of the Bearing foot 34 has a stop surface 33 which is received on the bearing plate 20 Stop 31 is assigned. On the bearing base 34 there is also an actuator 26 at the pivot point 27 hinged, the adjusting rod 28 with the movable relative to the bearing base 34 bearing plate 20 is connected.

The movable bearing plate 20 is also received on the axis 21, but in contrast to the base 34, it is pivotable about the axis 21. On the bearing plate 20 is in addition to the actuator 26 for turning the movable pull roller 10 on and off, a bolt 29 attached. On the one hand, this serves to accommodate the adjustable stop 30, on the other hand with its end facing the movable roller 10 as a stop for the mentioned in the bearing base 34 received stop element 31. The bolt 29 is through Screws 32 connected to the bearing plate 20. In the upper area of the bearing plate 20 a stud 25 is attached, with which the parallelism of each other on the side walls 2 of the folder 1 opposite bearing plates 20 can be monitored.

On the upper part of the bearing plate 20 there is also a direction of attack in both directions - Effective damping element 42 stored; also a biasing element 35 in the form of a compression spring received between two adjustable stops 36. This is guided on a rod 39 passing through the spring 35. By means of the attacks 36 can move apart by a reduction in the spring force and by whose adjustment to each other an increase in the spring force can be achieved.

From the perspective view of FIG. 3 it is apparent that the rod 39 by means of Bolt 37, secured by a circlip 38, is received on the end shield 15. Below the biasing element 35, the stud 25 is received on the bearing plate 20; the bolt 29 is arranged underneath, on which the two move the travel path from Bearing plate 20 to stop 34 and stops 30 and 31 are included.

Figures 4.1 and 4.2 show the two states 40 and 41 of the movable draw roller 10th

In Fig. 4.1, the piston rod 28 is connected to the upper end of the bearing plate 20 is in which the actuator 26 retracted. As a result, the bearing plate 20 together with Articulation point 17 bearing plate 15 tilted slightly about the axis 21, so that the distance between the lateral surface 11 and the material web 3 is shown. The parking path is limited by the adjustable stop 30 which is in position 40 the stop surface 33 rests on the bearing base 34. An adjustment of the stop 30 after above will result in a further turning away of the roll shell 11 from the web 3.

4.2 shows the adjusted state 41 of the movable pull roller 10 on the material web Third

In the employed position 41, the actuating rod 28 is extended from the actuator 26. As a result, the bearing plate 20 is pivoted about the axis 21 until the bolt 29 upside down of the stop element 31 almost touched. The contact to the material web 3 is now through Preloading element 35, which counteracts the end shield 15 about its articulation point 17 the material web 3 presses against the stationary roller 8. The damping element 42, articulated on the bearing plate 15 at the top, prevents this when passing impurities - like such as web gluing points - a vibration build-up on the swivel-mounted draw roller 10 occurs around its articulation point 17 on the extension 19 of the base plate 20.

As a result, the movable pull roller 10 is in position 41 in accordance with FIG 4.2 an even brief lifting of the adjustable pull roller 10 from the material web 3 prevented, so that no web tension fluctuations can occur. The storage unit according to the invention described above can thus advantageously both use in conventional folders as well as in pointless folders, both in newspaper printing and in commercial printing.

LIST OF REFERENCE NUMBERS

1

folding

2

Side wall

3

web

4

Web direction

5

upper pair of pull rollers

6

Perforierwalzenpaar

7

lower pair of pull rollers

8th

fixed roller

9

roll shell

10

movable roller

11

roll shell

12

drive

13

rotation

14

Zugwalzenachse

15

end shield

16

Articulation point damping element

17

pivot point

18

Articulation point preload element

19

extension

20

bearing plate

21

mounting axis

22

slot

23

Rifle

24

clamping screw

25

studs

26

On / Abstellorgan

27

linkage

28

control rod

29

bars

30

adjustable stop

31

adjustable stop

32

screw

33

stop surface

34

Support base

35

feather

36

spring stops

37

bolt

38

circlip

39

pole

40

Parked position

41

Employee position

42

damper

Claims (10)

1. A bearing unit for setting a pull roll (10) on and off a pull roll (8) which is mounted in a stationary manner, having actuating means permitting the pull roll (10) to be set laterally onto the material web (3) with an adjustable bearing plate (19, 20) and adjustable stops (30, 31) for adjusting the actuating travel of the movable pull roll (10), whereby at least one of the adjustable slots (30, 31) is accommodated on the bearing plate (19, 20), characterized in that a bearing foot (34) is attached on a shaft (21) and in that the bearing plate (19, 20), which can be moved around this shaft (21), can be adjusted coaxially with respect to said shaft (21), and in that a bearing housing (15), which accommodates the movable roll (10), is pivotably mounted and in that said bearing plate (19, 20) accommodates a prestressing element (35) that loads the bearing housing (15), and a damping element (42) that acts on said prestressing element.
2. The bearing unit as claimed in claim 1, characterized in that the setting travel of the movable pull roll (10) can be predefined via stops (30, 31) that determine the relative movement between bearing plate (19, 20) and bearing foot (34).
3. The bearing unit as claimed in claim 1, characterized in that the bearing plate (19, 20) can be moved around the shaft (21), relative to the bearing foot (34).
4. The bearing unit as claimed in claim 3, characterized in that the actuating means comprise an actuating unit (26) which is arranged between bearing plate (19, 20) and bearing foot (34).
5. The bearing unit as claimed in claim 1, characterized in that the actuating means comprise an actuating unit (26) and that the bearing housing (15) can be pivoted about the point of articulation (17) on the bearing plate (19, 20) by activating the actuating unit (26).
6. The bearing unit as claimed in claim 1, characterized in that the bearing housing (15) is loaded permanently by the damping element (42) that is accommodated on the bearing plate (19, 20).
7. The bearing unit as claimed in claim 1, characterized in that a spring is accommodated as a prestressing element (35) between bearing housing (15) and bearing plate (19, 20).
8. The bearing unit as claimed in claim 2, characterized in that the prestressing force on the prestressing element (35) can be varied by means of adjustable stops (36).
9. The bearing unit as claimed in claim 6, characterized in that the damping element (42) is a double-acting damping element.
10. A folder for processing material webs (3), having a bearing unit according to claim 1.

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