The present invention relates to a processing device for processing
continuous webs, said processing device being adapted for use in printing presses
or other processing machines for cutting and/or perforating and/or punching and/or
printing the continuous web, whereby said processing device comprises a processing
cylinder and a counter pressure cylinder cooperating therewith, whereby one of
the cylinders is movable relative to the other cylinder for being set in different
positions relative to said other cylinder and whereby the movable cylinder is mounted
in bearing elements which are displaceable by means of a displacing system, preferably
a compressed-air system.
There are many different displacing systems for displacing one cylinder
relative to the other in processing devices of the above type. One of these prior
art displacing systems is described in US-A-3 894 488 and comprises a wedge means
which is moved back and forth for adjusting the mutual positions of the cylinders.
When the wedge means is moved to any desired position, it is locked therein by
means of a lock system. For being able to lock said wedge means in its various
positions, the lock system is structurally very complex and expensive and the risk
for quick wear is great.
The object of the present invention is to eliminate this problem
and provide a simple and very effective lock system at devices of the above type.
This is arrived at by means of the characterizing features of claim 1.
The most essential advantage with the wedge system of the invention
is that the bearing elements for the movable cylinder are easily moved to desired
positions preferably by means of a compressed-air system and when they have reached
their desired positions, they are effectively wedged therein. Such a wedge-system
like lock device is quickly operable with simple means, it has a simple and reliable
construction, it is self-adjusting when worn and has therefore a long useful life.
The invention will be further described below with reference to the
accompanying drawings, in which
- fig. 1 is a front view of a processing device according to the invention;
- fig. 2 illustrates an end side of the processing device according to fig. 1;
- fig. 3 illustrates the other end side of the processing device of fig. 1;
- fig. 4 schematically illustrates a wedge system in operating position, said
wedge system forming part of the processing device of fig. 1;
- fig. 5 illustrates the wedge system of fig. 4 during a releasing phase;
- fig. 6 illustrates the wedge system of fig. 4 set in a free or rest position;
- fig. 7 schematically illustrates, with a side view support elements forming
part of the processing device, in a supporting position;
- fig. 8 shows the support elements of fig. 7 in another supporting position;
- fig. 9 finally, is a plan view of the supporting elements of figs. 7 and 8
and a coupling device therefor.
The drawings illustrate a processing device 1 for processing continuous
webs 2 such as paper webs, plastic webs or other types of webs. The processing
device 1 is preferably intended for use at printing presses or other processing
machines for cutting and/or perforating and/or punching and/or printing of the
continuous web 2.
The processing device 1 comprises a frame 3 with two frame end members
4 and 5 which are connected to each other through upper and lower connecting axes
6 and 7. Between the frame end members 4, 5 there is provided a counter pressure
cylinder 8 which is rotatably mounted in said end members 4, 5 and which preferably
has a drive gear 9. Between the frame end members 4, 5 and above the counter pressure
cylinder 8 there is provided a processing cylinder 10 which is equipped for relevant
processing of the continuous running web 2 and which preferably also includes a
drive gear 11. Both cylinders 8, 10 are rotated by means of a driving device (not
shown) via the drive gears 9, 11.
The processing cylinder 10 is rotatably mounted in two bearing elements
13, of which one is displaceably mounted in an opening 12 in one frame end member
4 and the other in an opening 12 in the other frame end member 5 in such a way
that the processing cylinder 10 can be displaced in vertical direction relative
to the counter pressure cylinder 8. The displacement of the bearing elements 13
and thus, of the processing cylinder 10 is accomplished preferably by means of
a compressed-air system 14, which can include a double-acting compressed-air box
15. Such a compressed-air box 15 can be provided on each frame end member 4, 5
and it can include a plunger or piston means 16 which is mounted on top of the
bearing element 13 and adapted for displacement thereof.
Each bearing element 13 is adapted for displacement to a position
FL (see fig. 4) at which the lower edge thereof engages support surfaces 17. In
this position, the bearing elements 13 retain the processing cylinder 10 in such
an operating position A relative to the counter pressure cylinder 8, that appropriate
processing of the web 2 running between said cylinders 8, 10 is carried out.
In order to ensure that said bearing elements 13 are firmly retained
in their operating positions FL and thereby, the processing cylinder 10 in its
operating position A, to permit quick release of said bearing elements for movement
out of said operating positions FL and thereby, movement of said processing cylinder
out of said operating position A, and for being able to carry out these measures
without wearing bearing members that are difficult to repair, the processing device
1 comprises a wedge system 18 which is provided to wedge up the processing cylinder
10 in its operating position A by wedging up the bearing elements 13 in their
operating positions FL.
The wedge system 18 includes a wedge 19 for each bearing element
13 and each such wedge is preferably located between an inclined surface 20 on
the bearing element, approaching one side 21 of the opening 12 as seen towards
the support surfaces 17, and said side or surface 21 of said opening. Furthermore,
the wedge 19 has such a shape that it with one wedge surface 22 can engage in inclined
surface 20 of the bearing element 13, while an opposite wedge surface 23 engages
said side 21 of the opening 12.
The wedges 19 or corresponding elements of the wedge system 18 are
preferably operable by means of a compressed-air system 24 for moving the wedge
19 to its wedge position KA, whereby it presses the bearing element 13 against
the support surfaces 17 and wedge up said element in said operating position FL
with a large force. The compressed-air system 24 is also adapted to move the wedge
19 from its wedge position KA to a free or rest position KB by pulling it up a
small distance (see fig. 5). In this rest position KB, the wedge 19 has released
the bearing element such that it can be pulled up to a free or rest position UL
by the compressed-air system 14 and thereby, the processing cylinder 10 is pulled
up to a free or rest position B relative to the counter pressure cylinder 8.
The compressed-air system 24 preferably cooperates with a lever system
25 on each frame end member 4, 5. Each such lever consists of a pivotally mounted
angled arm 26, of which one end portion is articulately connected to a piston
and cylinder unit 27 forming part of the compressed-air system 24 while the other
end portion is articulately connected to a rod 28, which in turn is provided on
the wedge 19. By activating the piston and cylinder unit 27, the angled arm 26
is pivoted and the movement of said arm transferred to the wedge 19, whereby an
advantageous lever effect is obtained.
Under certain circumstances, it can be necessary to adjust the operating
position A of the processing cylinder 10 relative to the counter pressure cylinder
8, e.g. for punching operations. This is done at the embodiment shown by moving
the support surfaces 17 towards or from the counter pressure cyliner 8. The support
surfaces 17 are defined preferably by movable support elements 29, 30 in the shape
of wedges, which with lower wedge surfaces 31 engage frame surfaces 32 that are
inclined relative to the counter pressure cylinder 8 in such a way that the support
surfaces 17 of the support elements 29, 30 move towards or from said counter pressure
cylinder 8 when said support elements are moved along the frame surfaces 32. This
movement of the support elements 29, 30 can be carried out manually by means of
an adjusting device 33. This device is preferably operated by turning a steering
wheel 34, the rotary motions of which are transferred to adjusting axes 37, 38
through clain transmissions 35, 36. Said axes 37, 38 cooperate with the support
elements 29, 30 through followers 39 in such a way that said followers move said
support elements along the frame surfaces 32 when the adjusting axes 37, 38 are
simultaneously turned by means of the steering wheel 34 through the chain transmissions
In order to ensure that both support elements 29, 30 are moved the
same distance along the frame surfaces 32 during the adjusting operation, the adjusting
axes 37, 38 cooperate with both support elements 29, 30.
The invention is not limited to the embodiment described above and
shown in the drawings, but may vary within the scope of the following claims with
regard to its construction and function. Thus, the wedge system 18 can be designed
otherwise than shown and still provide the required wedge-up effect. The wedge
system 18 can be operable in other ways than by a compressed-air system 24. The
processing cylinder 10 can be journalled in other types of bearing elements than
shown and the support surfaces 17 can be defined by other support elements, and
the adjusting device 33 can be constructed in other ways. Furthermore, the counter
pressure cylinder 8 can eventually be movable relative to the processing cylinder
10 instead of the opposite and it is eventually possible to make both cylinders
8, 10 movable relative to each other. It is also possible to mount the cylinders
8, 10 in another way relative to each other than shown. Furthermore, the bearing
elements 13 can be moved by means of another system than a compressed-air system
and the processing device can be used at other types of machines than the abovementioned.