Information
-
Patent Grant
-
6267320
-
Patent Number
6,267,320
-
Date Filed
Wednesday, June 2, 199925 years ago
-
Date Issued
Tuesday, July 31, 200123 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
US
- 242 5591
- 242 5594
- 242 3991
- 242 3992
- 242 5961
- 242 5332
- 242 563
- 242 5631
-
International Classifications
-
Abstract
In an unroll device provision is made for at least one unroll stand which comprises two lugs lodged in bearing supports. The bearing levers are horizontally movable individually. Furthermore, a supporting shaft is run on the bearing supports of an unroll stand in such a way that it can be shifted parallel allel to itself, but also out of its base position in a horizontal plane.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an unroll device with at least one unroll stand, comprising a machine frame, which has two bearing stands spaced apart; bearing supports, which are guided substantially horizontally movably on the bearing stands; shifting drives acting on the bearing supports; a supporting shaft, the ends of which are run on the bearing supports; lugs, which are guided on the supporting shaft non-rotatably relative thereto, but displaceably in their longitudinal direction; centering pivots for holding a reel, which are mounted on the lugs and define an unrolling axis; and at least one lifting drive coupled to the supporting shaft.
2. Background Art
Unroll devices of the generic type are known for instance from EP 0 629 574 B1. In this case the supporting shafts are guided via a stationary radial cam such that the reel unrolling axis, which is defined by the centering pivots, is moved in a vertical plane over a stationary rest taking up the paper reel on the ground so that paper reels of varying thickness, the center line of which differs correspondingly in height above the rest, can be seized reliably. In this known unroll device, the paper reel must be oriented on the rest, i.e. relative to the ground, such that the center line of the reel is parallel to the unrolling axis of the unroll device. Corresponding orientation of the center line of a paper reel takes place by the aid of a device as illustrated and described in U.S. Pat. No. 5,755,395.
U.S. Pat. No. 4,930,713 teaches another unroll device, in which the supporting shaft carrying the lugs is guided via eccentric cam plates. In this way, it is also possible to move the centering pivots of the lugs in a vertical plane so that paper reels of varying thickness can be seized reliably.
DE G 86 29 994 U1 teaches an unroll device in which the supporting shaft, which carries the lugs, is lodged in a parallel steering system so that the centering pivots are forcibly guided in a vertical plane.
SUMMARY OF THE INVENTION
It is an object of the invention to embody an unroll device of the generic type such that orientation of the reel to be picked up is not necessary prior to it being lifted by the unroll device.
According to the invention, this object is attained by the features wherein the supporting shaft is run on the bearing supports such that its central longitudinal axis is not only displaceable parallel to itself, but is also pivotal about a base position substantially in a horizontal plane; and wherein the shifting drives can be operated individually. Due to the fact that the supporting shaft and thus the unrolling axis are pivotal by some degrees not only parallel to themselves, but also relative to themselves in the horizontal plane, to which end the shifting drives of the bearing supports can be trigered independently from each other, i.e. due to the fact that the bearing supports of an unroll stand are movable relative to each other, the centering pivots of an unroll stand can be moved into a position in which the unrolling axis they define is in alignment with the center line of the paper reel lying before the device.
Further features, advantages and details of the invention will become apparent from the ensuing description of two exemplary embodiments, taken in conjunction with the drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1
is a lateral view, partially broken away, of an unroll device corresponding to the arrow in
FIG. 2
;
FIG. 2
is a longitudinal view of the unroll device corresponding to the arrow II in
FIG. 1
;
FIG. 3
is a lateral view of a modified embodiment of an unroll device corresponding to the arrow III in
FIG. 4
; and
FIG. 4
is a longitudinal view of the modified embodiment of an unroll device corresponding to the arrow IV in FIG.
3
.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments seen in
FIGS. 1
to
4
of an unroll device are largely identical. The ensuing description therefore applies to both embodiments, provided differences are not explicitly emphasized. Components which are substantially identical in both embodiments and differ only in minor constructional details not relevant to the invention nevertheless have the same reference numerals.
As seen in FIG.
1
and
FIG. 3
, each unroll device illustrated comprises two unroll stands
1
,
1
a
disposed in mirror symmetry to a vertical center plane
2
which is parallel to the plane of the drawing according to
FIGS. 2 and 4
. Due to the mirror symmetry of these stands
1
,
1
a
, the components allocated to the stand
1
on the left in
FIGS. 1 and 3
will be denoted in the following by a simple reference numeral, and the components allocated to the stand
1
a
on the right in
FIGS. 1 and 3
will be denoted by the same reference numeral with the letter “a” added, there being no need of renewed description. As further seen in
FIGS. 2 and 4
, the two unroll stands
1
and
1
a
themselves are again constructed in mirror symmetry to a vertical center plane
3
which is parallel to the plane of the drawing of
FIGS. 1 and 3
. This is why the components on the right in
FIGS. 2 and 4
and also visible in
FIGS. 1 and 3
are denoted by reference numerals without a prime, whereas the components on the left in
FIGS. 2 and 4
are denoted by the same reference numeral, however with an additional prime, there being no need of renewed description.
The unroll device comprises a machine frame
4
with two bearing stands
5
,
5
′ which are disposed at a distance from each other and are rigidly joined to each other by means of an upper longitudinal beam
6
and lower longitudinal braces
7
,
7
a
. The stands
5
,
5
′ are supported by base plates
8
,
8
′ on ground foundations
9
,
9
′.
In the embodiment according to
FIGS. 1 and 2
, a bearing lever
10
,
10
a
and
10
′, respectively, is lodged as a bearing support on each base plate
8
,
8
′ for each unroll stand
1
,
1
a
in a manner to be pivotal in a stationary base bearing
11
,
11
a
,
11
′ disposed on the respective base plate
8
,
8
′. A pivoting drive
12
,
12
a
acts as a shifting drive on the respective bearing lever
10
,
10
a
,
10
′; the pivoting drive
12
,
12
a
is a piston-cylinder drive bilaterally actuated by pressurized fluid and it is articulated stationarily, but pivotally to a ground bearing
13
,
13
a
mounted on the respective base plate
8
,
8
′.
The two ends of a supporting shaft
14
,
14
a
are run by bearings
15
,
15
′ and
15
a
, respectively, on the bearing levers
10
,
10
′ of the unroll stand
1
and correspondingly in the bearing levers
10
a
of the other unroll stand
1
a
. These bearings
15
,
15
′ and
15
a
are designed such that it is possible not only to move the supporting shafts
14
,
14
a
so that their central longitudinal axes
16
,
16
a
are shifted parallel to themselves and to the vertical center plane
2
, but also to pivot or deflect them relative to their longitudinal direction. Consequently, they can be deflected in such a way that their central longitudinal axes
16
,
16
a
are moved substantially in the horizontal out of a position parallel to the vertical center plane
2
. To this end, the bearings
15
,
15
′ and
15
a
, respectively, are for instance spherical bearings, which are supported in the bearing levers
10
,
10
′ and
10
a
to be pivotally movable and displaceable to a certain extent in the direction of the respective axis
16
and
16
a
, respectively. The bearings
15
,
15
′ and
15
a
are located at the upper ends, opposite the base bearings
11
,
11
a
and
11
′, of the bearing levers
10
,
10
a
and
10
′.
On each supporting shaft
14
,
14
a
, two lugs
17
,
17
′ and
17
a
are mounted at a distance from each other and non-rotatably relative to the supporting shaft
14
,
14
a
. To this end, the supporting shafts
14
,
14
a
have outer guiding grooves
18
, which are parallel to their central longitudinal axis
16
,
16
a
and with which engage guiding projections
19
,
19
a
formed on the respective lug
17
,
17
′,
17
a
so that the lugs
17
,
17
a
,
17
′ are mounted on the respective supporting shaft
14
,
14
a
non-rotatably, but displaceably in the lengthwise direction thereof. The lengthwise displacement or lengthwise adjustment relative to each other in pairs, of the lugs
17
,
17
′ and
17
a
, which are disposed on a supporting shaft
14
and
14
a
, is effected by means of two adjustment drives
20
,
20
′, which are likewise piston-cylinder drives actuated by pressurized fluid, one end of which is articulated to the supporting arm
17
and
17
′ and the other end to the supporting shaft
14
and
14
′, respectively, as seen in particular in
FIGS. 2 and 4
.
In the vicinity of the respective ends of the supporting shafts
14
,
14
a
, i.e. neighboring the bearings
15
,
15
a
and
15
′, pivoting arms
21
,
21
a
and
21
′,
21
′
a
are mounted on the support shafts
14
,
14
a
. Lifting drives
22
,
22
a
act on the free ends of these pivoting arms
21
,
21
a
and
21
′,
21
′
a
, which are also piston-cylinder drives actuated by pressurized fluid, which are articulated in the upper portion of the bearing stands
5
,
5
′ on the one hand and to the free ends, facing each other, of the pivoting arms
21
,
21
a
and
21
′,
21
′
a
on the other hand, as seen in
FIGS. 1
to
4
.
Mounted on the free ends of the lugs
17
,
17
′ and
17
a
turned away from the respective supporting shaft
14
,
14
a
are centering pivots
24
,
24
′, which are directed towards each other in each unroll stand
1
and
1
a
. These centering pivots
24
,
24
′ can be driven and braked by unrolling drives
25
,
25
′,
25
a
, which are mounted on the respective lug
17
,
17
′ and
17
a
and can also work as brakes. Due to the described pivotability of the axes
16
,
16
a
, the unrolling axes
26
and
26
a
, which connect a pair of centering pivots
24
,
24
′, are not only displaceable parallel to themselves, but also deflectable out of their position.
The pivoting drives
12
and
12
a
of each unroll stand
1
and
1
a
can be actuated and triggered individually so that the motions they effect are independent of each other.
The following is a description of the working of the unroll device, proceeding from the fact that a paper reel
28
, outlined by dashes, is deposited on a rest
27
and is intended to be picked up, centered and pivoted upwards for unrolling.
The pivoting arms
21
,
21
′ are pivoted by the lifting drives
22
,
22
′ so that the centering pivots
24
,
24
′ move into a position in alignment with the center line
29
of reel
28
. When the unrolling axis
26
is not parallel to the center line
29
, i.e. not parallel to the vertical center plane
2
, then the bearing levers
10
,
10
′ are pivoted by correspondingly varying triggering of the pivoting drives
12
so that the unrolling axis
26
moves into a position parallel to the center line
29
of the paper reel
28
.
FIG. 1
roughly outlines to which extent the bearing levers
10
,
10
′ and
10
a
of each unroll stand
1
and
1
a
can be pivoted relative to each other with the corresponding central longitudinal axis
16
and
16
a
of the respective supporting shaft
14
and
14
a
and thus the unrolling axis
26
and
26
a
being pivoted correspondingly. By simultaneous pivoting of the bearing levers
10
,
10
′ and
10
a
in an opposite direction, varying, non-parallel paths of the center line
29
of the reel
28
relative to the center plane
2
can be balanced as illustrated by the pivoting paths
30
and
31
for the center line of the reel
28
which are roughly outlined for the unroll stand
1
in FIG.
1
. When the unrolling axis
26
defined by the centering pivots
24
and
24
′ is in alignment with the center line
29
of the reel
28
, then the adjustment drives
20
are triggered so that the centering pivots
24
,
24
′ engage concentrically in the paper reel
28
. Then orientation of the paper reel
28
takes place by the pivoting drives
12
,
12
′ being triggered correspondingly so that the center line
29
moves into a horizontal position parallel to the center plane
2
, i.e. the desired base position. Subsequently, it is pivoted upwards by actuation of the lifting drives
22
,
22
′ into a position suitable for unrolling. Fundamentally, only a single lifting drive
22
and
22
a
or
22
′ and
22
′
a
is needed for each supporting shaft
14
,
14
a
; in the embodiments shown, two lifting drives
22
,
22
′ and
22
a
,
22
′
a
are provided for each supporting shaft
14
,
14
a
solely so as to avoid that substantial torsions develop in the respective supporting shaft
14
and
14
a.
FIG. 2
shows the greatest possible length a of a paper reel
28
to be picked up and the smallest possible length b of a paper reel
28
for the unroll stand
1
. Further, the entire pivoting range of the lugs
17
,
17
′ is outlined on the left in
FIG. 1
for the pivoting path
30
with the supporting shaft
14
shifted as far as possible towards the center plane
2
, whereas the greatest possible pivoting range of the lugs
17
a
is shown on the right in
FIG. 1
for the pivoting path
31
a
of the unroll stand
1
a
with the supporting shaft
14
a
moved as far as possible away from the center plane
2
. Triggering the various drives actuated by pressurized fluid, i.e. the pivoting drives
12
and
12
a
, the adjustment drives
20
,
20
a
and the lifting drives
22
,
22
′,
22
a
,
22
′
a
, takes place in a manner known per se, for instance via solenoid valves which are again triggered by a central control system
33
only roughly outlined. This central control system
33
receives signals from transmitters
32
,
32
′,
32
a
, which are only roughly outlined and which detect the actual position of the paper reel
28
, in concrete terms its distance from the transmitters and thus from the vertical center plane
2
. Provided above the paper reel
28
are transmitters
34
and
34
a
, respectively, which detect the distance of the paper reel
28
from the respective upper transmitter
34
and
34
a
and thus the distance
29
over the rest
27
. The diameter of the reel
28
is detected by these transmitters
34
and
34
a
. As opposed to this, the transmitters
32
,
32
′ and
32
a
serve to detect the oblique position of the center line
29
relative to the vertical center plane
2
. Such an oblique position may for example amount to as much as +/−60 mm which can be balanced. Moreover, irregular web tensions can be compensated by the pivoting drives
12
and
12
a
being correspondingly triggered.
In the embodiment according to
FIGS. 3 and 4
, the supporting shafts
14
,
14
a
are run by means of the bearings
15
,
15
′,
15
a
on bear
35
a
, which are displaceable horizontally and crosswise to the vertical center plane
2
and which are guided for displacement on bars
36
,
36
′,
36
a
mounted on the bearing stands
5
,
5
′. Since in this embodiment, the bearing supports
35
,
35
′,
35
a
make exclusively horizontal motions, the shifting drives
37
,
37
a
also engage horizontally, i.e. they are articulated to the bearing supports
35
,
35
a
on the one hand and, approximately at the same height, to the bearing stand
5
on the other hand. Also for this design,
FIG. 3
shows the position of the respective bearing support
35
and
35
a
retracted inwards as far as possible and extended outwards as far as possible, from which also results the horizontal pivotability of the unrolling axis
26
and
26
a.
Claims
- 1. An unroll device with at least one unroll stand (1, 1a), comprisinga machine frame (4), which has two bearing stands (5, 5′) spaced apart; bearing supports (10, 10′, 10a; 35, 35′, 35a), which are guided substantially horizontally movably on the bearing stands (5, 5′); shifting drives (12, 12a; 37, 37a) acting on the bearing supports (10, 10′, 10a; 35, 35′, 35a); a supporting shaft (14, 14a), which has a central longitudinal axis (16, 16a), and the ends of which are run on the bearing supports (10, 10′, 10a; 35, 35′, 35a); lugs (17, 17′, 17a), which are guided on the supporting shaft (14, 14a) non-rotatably relative thereto, but displaceably in the direction of the central longitudinal axis (16, 16a); centering pivots (24, 24′, 24a) for holding a reel (28), which are mounted on the lugs (17, 17′, 17a) and define an unrolling axis (26, 26a); and at least one lifting drive (22, 22′, 22a, 22′a) coupled to the supporting shaft (14, 14a); wherein the supporting shaft (14, 14a) is run on the bearing supports (10, 10′, 10a; 35, 35′, 35a) such that its central longitudinal axis (16, 16a) is not only displaceable parallel to itself, but is also pivotal about a base position substantially in a horizontal plane; and wherein the shifting drives (12, 12′; 37, 37′) are individually operable.
- 2. An unroll device according to claim 1, wherein the supporting shaft (14, 14a) is run on the bearing supports(10, 10′, 10a; 35, 35′, 35a) by means of spherical bearings (15, 15′, 15a).
- 3. An unroll device according to claim 1, wherein clearance in the direction of the central longitudinal axis (16, 16a) exists between the supporting shaft (14, 14a) and the bearing supports (10, 10′, 10a; 35, 35′, 35a).
- 4. An unroll device according to claim 1, wherein the bearing supports are bearing levers (10, 10′, 10a) pivotally articulated to the bearing stands (5, 5′).
- 5. An unroll device according to claim 1, wherein the bearing supports (35, 35′, 35a) are formed substantially horizontally displaceably on the bearing stand (5, 5′).
- 6. An unroll device according to claim 1, wherein at least one transmitter (34, 34a) is provided for detecting the distance of a central longitudinal axis (29) of the reel (28) from the transmitter (34, 34a).
- 7. An unroll device according to claim 1, wherein transmitters (32, 32′, 32a) are provided for detecting an oblique position of the reel (28).
Priority Claims (1)
| Number |
Date |
Country |
Kind |
| 198 24 695 |
Jun 1998 |
DE |
|
US Referenced Citations (9)
Foreign Referenced Citations (7)
| Number |
Date |
Country |
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Nov 1987 |
DE |
| 40 08 897 |
Sep 1991 |
DE |
| 42 24 309 |
Jan 1994 |
DE |
| 0 387 365 |
Sep 1990 |
EP |
| 0 629 574 |
Dec 1994 |
EP |
| 0 700 854 |
Mar 1996 |
EP |
| 1 600 070 |
Oct 1981 |
GB |
