Information
-
Patent Grant
-
6418846
-
Patent Number
6,418,846
-
Date Filed
Wednesday, March 7, 200123 years ago
-
Date Issued
Tuesday, July 16, 200222 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Hirshfeld; Andrew H.
- Crenshaw; Marvin P.
Agents
- Jones, Tullar & Cooper, PC
-
CPC
-
US Classifications
Field of Search
US
- 101 216
- 101 142
- 101 148
- 101 348
-
International Classifications
-
Abstract
A friction roller is connected, in an articulated manner, in the area of its axis of rotation, to one end of a connecting rod. The second end of this connecting rod is connected, in an articulating manner, to a peripheral portion of a rotatable lever that can be driven. A rotational axis of the lever is situated at an angle with respect to the rotational axis of the friction roller.
Description
FIELD OF THE INVENTION
The present invention relates to a roller for a rotary printing press. The roller is connected by a coupler to a drive mechanism in an eccentric fashion.
DESCRIPTION OF THE PRIOR ART
An arrangement for the axial back-and-forth movement of an ink roller and having a device for changing the axial lift is disclosed in DE-PS 12 40 888.
SUMMARY OF THE INVENTION
The object of the present invention is directed to creating a roller which can be reciprocally moved in the axial direction.
In accordance with the present invention, this object is attained by the provision of a roller which is connected to a drive mechanism by a coupler. The coupler is hingedly seated and is connected eccentrically with the drive mechanism. The number of revolutions of the drive, and the number of revolutions of the roller can be changed in relation to each other.
The advantages which can be achieved by the present invention lie, in particular, in that the lift frequency and/or the lift length can be selectively set during the operation.
BRIEF DESCRIPTION OF THE DRAWING
A preferred embodiment of the present invention is represented in the sole drawing FIGURE and will be described in greater detail in what follows.
The sole drawing FIGURE represents a schematic lateral view of the reciprocally movable roller with its lifting drive mechanism in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Both roller journals
03
of a driveable roller
02
, for example a friction roller, are rotatably and axially displaceably arranged in two lateral frames
01
. Only one lateral frame
01
is shown in the drawing. The desired lift or lateral displacement ±h of, for example ±25 mm in a direction of the axis of rotation
06
of the roller
02
, can be set either in steps or in an infinitely variable manner.
Bearings
04
, for example sliding bearings, are provided in bores in the lateral frames
01
for seating and slidably supporting the roller journals
03
.
A journal joint
19
, for example with a play or degrees of freedom, “f” of “f”=4, is attached, in the area of the axis of rotation
06
of the roller journal,
03
to the end of one of the roller journals
03
, for example at a front face
05
of the end of the roller journal
03
. The journal joint
19
is embodied, for example, as a traction- and shear- resistant ball tube joint. The spherical gudgeon
09
of joint
19
is attached at the front face
05
of the journal
03
, and the spherical liner
10
of joint
19
is attached at a first end
07
of a bending-resistant coupling rod
08
.
A spherical liner
21
is attached at a second end
22
of the bending-resistant coupling rod
08
.
A drive joint
11
, for example with a play or degrees of freedom “f” of “f”=4, is provided at an outer end
12
of a rotatable, drive member such as a driveable one-armed drive lever
13
, or at an outer end of a radius of a drive disk. The drive joint
11
is embodied, for example, as a traction- and shear-resistant ball tube joint. Its spherical gudgeon
15
is seated on the outer end
12
of the drive lever
13
and is interlockingly connected with the spherical liner
21
.
An inner end
25
of the drive lever
13
is fastened, fixed against relative rotation, on a shaft
18
of a drive mechanism
23
. Shaft
18
rotates around its axis of rotation
27
. Drive mechanism
23
may be, for example, an rpm- controlled electric motor
23
. In this case, the shaft
18
can be the driveshaft of an electric motor
23
.
The axes of rotation
06
of the roller
02
and
27
of the electric motor
23
can be aligned with each other in such a way that, in a first extreme case, they coincide, and in a second extreme case they enclose an angle α, of, for example, 30°. The angle α can be set in steps or in an infinitely variable manner and can be maintained in a desired position.
Setting of the angle a can take place directly by tilting the drive mechanism, the drive motor
23
in the preferred embodiment. To this end, feet are provided, for example on the bottom of the drive motor
23
, at the front near the driveshaft
18
. These feet are fastened on a rocker
24
. The rocker
24
is pivotably connected with the lateral frame
01
by means of a link, for example a hinge
26
with a degree of freedom “f”=1. The members of the hinge
26
are interlockingly connected in such a way that lateral tilting in the course of their force transmission is not possible.
Moreover, a rear, or remote from the driveshaft, bearing
31
in the form of an eye is provided on the bottom of the drive motor
23
, which rear bearing
31
is hingedly connected with a fork head
14
of a linear drive mechanism
28
.
The linear drive mechanism
28
can consist, for example, of a threaded spindle
29
, which can be driven in either of its two directions manually or by a motor and whose upper end is rotatably joined to the fork head
14
. The thread of the threaded spindle
29
is in engagement with an inner thread of a threaded nut
20
. The threaded nut
20
is fastened in a nut holder
32
fixed in place on the lateral frame
01
.
Pivoting of the drive mechanism
23
, and therefore of the drive element - i.e. the one-armed lever
13
-, in the desired direction takes place by an appropriate actuation of the linear drive mechanism
28
. If the threaded spindle
29
is turned to the left or to the right, the rear end of the drive mechanism
23
is raised or lowered, and the one-armed lever
13
is also pivoted because of this. The one-armed lever exerts pressure or traction on the coupling rod
08
, and therefore on the roller journal
03
.
Thus, turning the threaded spindle
29
results in a corresponding change of the lift or the lateral displacement h of the roller journal
03
and of the roller
02
.
The lift or lateral displacement ±h becomes zero as soon as the drive
23
is no longer operating or the angle a equals zero.
The lever
13
can be embodied as a one-armed lever
33
or as a two-armed lever
34
, as depicted in dashed lines in the sole drawing figure. An outboard end of the second or free end of the two-armed lever
34
can be provided with a compensating weight
38
. It is also possible to provide a rotating disk in place of the lever
13
.
The drive mechanism
23
, for example an electric motor, is designed as an rpm-controlled or regulated drive mechanism for being able to set the lift or the lateral displacement frequency. If the number of revolutions of the drive mechanism
23
is increased, the lift frequency is proportionally increased is reduced, the lift frequency is reduced proportionally with it. If the drive mechanism
23
is switched off, the friction roller
02
no longer performs a lift; i.e. it no longer moves laterally along its axis of rotation.
In accordance with one variation, it becomes additionally possible to arrange an energy storage device, for example a compression spring
40
between the lateral frame
01
and a right end face of the friction roller
02
. Because of this, the coupling rod
08
is only stressed by traction. This occurs when the friction roller
02
moves from the left to the right, as shown in the drawing, and the compression spring
40
is compressed in the process. With a subsequent movement of the friction roller from the right to the left, the compression spring relaxes again and releases its stored energy.
It is also possible to arrange a compression spring between a left front face of the friction roller
02
and a left lateral frame. This results in the coupling rod
08
only being stressed by pressure.
While a preferred embodiment of a roller in accordance with the present invention has been set forth fully and completely hereinabove, it will be apparent to one of skill in the art that various changes in, for example the overall size of the roller, the specific type of sliding bearing used, and the like can be made without departing from the true spirit and scope of the present invention which is accordingly to be limited only by the following claims.
Claims
- 1. A laterally shiftable roller assembly comprising:a roller; roller journals supporting said roller for lateral shifting and for rotation about a roller axis of rotation; a drive mechanism useable to shift said roller laterally, said drive mechanism having a drive mechanism axis of rotation; a coupler extending between said roller and said drive mechanism, said coupler having a first end connected to said roller journal and having a second end connected to said drive mechanism offset from said drive mechanism axis of rotation wherein rotation of said drive mechanism causes said roller to shift laterally along said roller axis of rotation and further wherein a number of revolutions of said drive mechanisms and a number of revolutions of said roller can be changed in relation to each other; and means supporting said drive mechanism for pivotal movement with respect to said roller axis of rotation to shift said drive mechanism axis of rotation relative to said roller axis of rotation to vary an amount of said lateral shifting of said roller.
- 2. The roller assembly of claim 1 further wherein said drive mechanism has a shaft with a shaft axis of rotation, said roller axis of rotation and said shaft axis of rotation intersecting at an acute angle.
- 3. The roller assembly of claim 2 wherein said acute angle is variable.
- 4. A laterally shiftable roller assembly comprising:a roller; roller journals supporting said roller in lateral frames for lateral shifting of said roller and for rotation of said roller about a roller axis of rotation; a drive mechanism, said drive mechanism being useable to accomplish said lateral shifting of said roller, said drive mechanism having a drive mechanism axis of rotation and having a variable speed of rotation; a drive member, said drive member having a first end connected to, and driven by said drive mechanism, said drive member acting as a drive lever; a coupling rod, said coupling rod having a first end connected to one of said roller journals and having a second end connected to said drive member remote from said drive member first end, said drive mechanism and said drive member generating a rotating movement of said coupling rod about said roller axis of rotation; and means supporting said drive mechanism for pivotable movement with respect to said roller axis of rotation, said pivotable movement of said drive mechanism shifting said drive mechanism axis of rotation with respect to said roller axis of rotation to vary an amount of said lateral shifting of said roller.
- 5. The roller assembly of claim 4 wherein said drive member is selected from the group including a one-armed lever, a two-armed lever and a disk.
- 6. The roller assembly of claim 5 wherein said drive member is a disk secured to said drive mechanism.
- 7. The roller assembly of claim 4 further including a spring force storage device positioned between a front end face of said roller and one of said lateral frames.
- 8. A laterally shiftable roller assembly comprising:a roller; roller journals supporting said roller in lateral frames for lateral shifting and for rotation about a roller axis of rotation; a drive mechanism useable to shift said roller laterally, said drive mechanism having a shaft with a shaft axis of rotation and having an adjustable number of revolutions, said roller axis of rotation and said shaft axis of rotation intersecting at an acute angle; a drive member driven by said drive mechanism, said drive member acting as a drive lever; a coupling rod having a first end connected to one of said roller journals and having a second end connected to said drive member, said drive mechanism generating a rotating movement of said coupling rod about said roller axis of rotation; and means supporting said drive mechanism for pivotable movement with respect to said roller axis of rotation.
- 9. The roller assembly of claim 8 wherein said acute angle is variable.
Priority Claims (1)
Number |
Date |
Country |
Kind |
198 40 806 |
Sep 1996 |
DE |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/DE99/02723 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/13902 |
3/16/2000 |
WO |
A |
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1 240 888 |
Feb 1959 |
DE |
40 13 416 |
Nov 1991 |
DE |
0 454 010 |
Oct 1991 |
EP |