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Description  |
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FIELD OF THE INVENTION
The present invention is directed to a device for deflecting a web of material. At least two turning bars are displaceably arranged in a common guide.
BACKGROUND OF THE INVENTION
A device for shifting narrow paper webs in the form of partial paper webs is known from DE 38 16 900 A1.
DE-AS 17 61 899 shows turning bars which are staggered in height.
U.S. Pat. No. 3,734,487 discloses two turning bars arranged in a triangle. A web of material can be conducted to a registration roller from these turning bars.
EP 0 784 590 B1 discloses a turning arrangement in which a guide roller and the turning bars have different diameters. The turning bars, which are arranged at 90.degree. in respect each other are of equal diameter.
SUMMARY OF THE INVENTION
The object of the present invention is directed to providing a device for deflecting a web of material.
In accordance with the present invention, this object is attained by supporting at least two turning bars for displacement in a common guide. The turning bars and any registration rollers, which may also be included in the web deflecting device,
are arranged to minimize the height of the device. The turning bars are typically arranged at approximately 45.degree. to the production direction of the web or webs entering the device.
The advantages which can be achieved by the present invention reside primarily in that a guidance arrangement can be created which, when viewed in the running direction of the paper web, permits a shorter construction than prior guidance
arrangements, and with at least the same number of partial paper web shifts, and which can serve downstream-connected devices with several longitudinal folding devices and/or transverse cutting devices. It is moreover possible to achieve a lower
structural height.
The number of deflection devices can be reduced. Shorter paper travel is also achieved. The linear register or cutting register remains within the permissible tolerance range during braking, and of course also acceleration of the web, even at
the highest web running speeds, so that the amount of waste is clearly reduced. This register maintenance is the result of the fact that the linear registration rollers are only laid out to the maximum width of the partial paper webs, and not to the
maximally possible paper web width. Because of this, the centrifugal masses of the rollers, which must be accelerated or braked, become considerably smaller. It is possible to bring the turning bars in each horizontal plane, which number can be one,
two or even more, individually or together to preselectable positions by use of a remotely controllable drive mechanism, which substantially shortens the required amount of time for production changes. Each one of these web deflecting or guidance
arrangements can be produced as a whole, with all electro-pneumatic and mechanical installations, as a stackable modular unit by itself. Depending on the number of paper webs, or partial paper webs, to be processed, the modular units are then stacked on
top of each other and are connected with each other to form a paper guidance arrangement.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the present invention is represented in the drawings and will be explained in greater detail in what follows.
Shown are in:
FIG. 1, a material web deflection device module in accordance with the present invention, with a plurality of deflection rollers and deflection arrangements and a linear registration device in a perspective representation,
FIG. 2, a material web deflection device module in accordance with FIG. 1 with two partial paper paths of two partial paper webs, with a partial paper web entering from the left, in a perspective representation,
FIG. 3, a material web deflection device module in accordance with FIG. 1, with two partial paper paths of two partial paper webs with a partial paper web entering from the right, in a perspective representation,
FIG. 4, a side elevation view of the material web deflection device module in accordance with FIG. 1,
FIG. 5, a roller housing frame, consisting of a plurality of material web deflection device modules stacked on top of each other,
FIG. 6, a partial side elevation of FIG. 1, showing a first type of configuration of a pair of deflection devices, represented in a schematic view opposite the running direction L and with the depiction of the various horizontal planes,
FIG. 7, a view similar to FIG. 6 and showing a second type of configuration of a pair of deflection devices, represented in a schematic view opposite the running direction L and with the depiction of the various horizontal planes, and in
FIG. 8, a material web deflection device module in accordance with FIG. 1, represented with two paper paths of two partial paper webs, with half a partial paper web of whole web width entering from the left, and with half a partial paper web of
whole web width entering from the right, which right entering half web has been cut into two partial paper webs of one-quarter web width, in a perspective representation.
DESCRIPTION OF THE INVENTION
In principle, a left partial paper web entry and a right partial paper web entry into a folding apparatus 50, with at least two upstream-connected longitudinal folding devices, is possible. In actual use, a decision is made prior to planning the
layout of a web-fed rotary printing press whether it is to be equipped with a left partial paper web entry or with a right partial paper web entry. With a left entry, a left partial paper web 04 runs, viewed in the paper running direction L, directly,
i.e. not turned, into a left longitudinal folding apparatus, for example. With a right entry, a right partial paper web 03 runs, viewed in the paper running direction L, or production direction, directly, i.e. not turned, either directly or via a guide
roller 73 of a roller housing frame 20 into a folding apparatus 50 with one or several longitudinal folding devices, as seen in FIG. 5. It is also possible to provide more than two longitudinal folding devices. In this case, the running direction L is
the running direction in which one paper web 02, or in which partial paper webs 03, 04, run up on a guide roller 11 in the production direction. Left transverse running directions QL and right transverse running directions QR, as seen in FIGS. 1-3, are
web or partial web running directions which refer to the running direction L and are directed transversely to the left (QL), or transversely to the right (QR).
Partial paper webs 03, 04 within the meaning of this application are understood to be not only narrow paper webs 03, 04, 03L, 03R, 04L, 04R, which can be produced by longitudinal cutting from a whole-width or half-width paper web 02. They can
also be narrow paper webs 03, 04, which are fed from narrow, so-called quarter-width or eighth-width paper rolls, or also narrow paper webs 03, 04, which originate from other printing presses which are upstream-connected simultaneously with the running
production of this paper web guidance device 01, or which are supplied, already preprinted, as a web from a storage device.
For example, as represented in FIGS. 1, 2 and 3, and as viewed in the paper running direction L, the rollers 30, 11, 35 are rotatably seated in a right lateral frame 06 and a left lateral frame 07 of the paper web guidance or deflection device
01. Both lateral frames 06, 07 are arranged parallel next to each other and are spaced apart.
A left transverse frame 08, or a right transverse frame 09 are attached at right angles to and are supported on the lateral frames 06, 07. They are aligned with each other and they laterally extend past the left lateral frame 07, or the right
lateral frame 08, as seen in FIG. 1, for a sufficient length so that--viewed in the transverse running direction QL and QR--there are sufficiently wide movement possibilities to the left and right for web deflection devices, or turning bars 13, 14 . The
ends of the transverse frames 08, 09 terminate in a left bearing block 57, or in a right bearing block 58, respectively and they are parallel in respect to each other. The bearing blocks 57, 58 are of the same height and width as the transverse frames
08, 09 and project in the web running direction L. An upper guide rod 59 and a lower guide rod 61 are each attached with their two ends, fixed against relative rotation, in the bearing blocks 57, 58. The guide rods 59, 61 are arranged horizontally and
vertically above each other and are spaced at at a minimum possible distance b from each other, for example 8 to 25 cm, depending on the diameters of the deflection devices 13, 14, 29, arranged on top of each other, and the laterally arranged
registration roller 18, and at the required horizontal distance from each other.
A paper web 02, for example without being longitudinally cut--because it came from below--coming from a print unit, not represented, which is part of the paper web guidance device 01, or from a print unit which produces in a parallel operation,
of another web-fed rotary printing press, or from a preprinted rolled up paper roll, directly reaches a first driven or non-driven guide roller or deflection roller 11. Roller 11 is rotatably seated in lateral frames 06, 07. The guide roller 11 can be
embodied as a counter-cutting roller, adjacent which one or several driven longitudinal web cutting devices 12 are arranged so they can be placed against guide roller 11 or moved away from it, as seen in FIG. 1. Roller 11 can also be structured as a
driven traction roller. For driving the guide roller 11, a drive mechanism 44, for example an electric or pneumatic motor with an integrated angle of rotation transducer 45 for detecting the actual number of revolutions and/or the actual angle of
rotation, is flanged on the lateral frame 07, for example. When using the guide roller 11 as a traction roller, the motor 44 and the angle of rotation transducer 45 and a reference variable transducer, not specifically represented, are connected to a
control device, which is not depicted, for setting the desired traction force on the paper web 02.
If the paper web 02 enters into the paper web guidance device 01 coming from above, a first additional deflection roller 30 and a second additional deflection roller 35, as seen in FIGS. 4 and 5, are rotatably seated, spaced apart from each other
horizontally, in the lateral frames 06, 07. In this case, the axes of rotation of the deflection rollers 30 and 35 lie, viewed in the paper web running direction L, to the left and right of, and at a sufficient distance from the guide roller 11 and on
the same horizontal plane. Their axes of rotation preferably lie lower than the axis of rotation of the guide roller 11.
The rollers 30, 35 merely have the object of deflecting the incoming paper web 02, or so-called partial paper webs 03, 04, for example so-called half-width partial paper webs 03, 04, or so-called quarter-width partial paper webs 03L, 03R, 04L,
04R in such a way that they run up correctly on the guide roller 11.
The paper web 02, or the partial paper webs 03, 04 are laterally aligned by utilization of an upstream-located lateral registration device, not specifically represented. The non-longitudinally cut paper web 02, or the several partial paper webs,
come to lie within a left web path running border 55 and a right web path running border 56 of a web running path 54, as seen in FIG. 2, whose position in the axial direction of the guide roller 11 can be preset. The web running path 54 has a maximum
width b54, which is wider than the maximally permissible paper web width b02, or than the sum of all of the partial paper web widths of the partial paper webs 03, 04, 03L, 03R, 04L, 04R which can enter simultaneously into the paper web guidance device
01, respectively depending on which web width or web width sum is greater.
A registration roller 18, with an associated displacement device 22, is attached to the left bearing block 57 for example by being supported on the outside of the left bearing block 57 of the left transverse frame 08. The device for displacement
22 has a guide device 21 with a movable left carriage 19, on which the registration roller 18 is fastened, for example in a cantilevered manner, i.e. fastened only with one end, on the carriage 19. Its other end is free. The registration roller 18 is
respectively displaceable, by movement of the carriage 19, along the partial paper web running direction QL and QR of the partial paper web 03 or 04, partial web which is running up on it, as seen in FIG. 1. For this purpose, the device for displacement
22 has a drive mechanism 36 supported on it, with an integrated angle of rotation transducer 41. The displacement device 22 has, for example, a motor drive 36, 41 with a gear for creating a linear movement. A positionally accurate displacement and
fixation in place of the registration roller 18 is possible by operation of this displacement device 22. Such a gear could be, for example, a worm gear with a traction spindle. A similar arrangement is provided on the right side of the paper web guide
device but is not specifically shown.
Viewed in the paper running direction L, a horizontal first or right 45.degree. deflection device 13, for example in the form of a right turning bar 13, and to the left of it a horizontal second or left 45.degree. deflection device 14, for
example in the form of a left turning bar 14, are provided, with both being spaced apart from the guide roller 11. Their ends 27, 26, remote from the guide roller 11 are rigidly fastened, for example on a common fastening carriage 16 or two separate,
separately driveable fastening carriages.
The 45.degree. deflection devices, or turning bars 13, 14 can be displaced and fixed in place, for example by operation of the common fastening carriage 16, transversely to the running direction L into the left transverse running direction QL
and the right transverse running direction QR. The deflection devices, or turning bars 13, 14 can be displaced into the left transverse running direction QL and the right transverse running direction QR. The displacement of the right deflection device
or turning bar 13 is structured in such a way that its entire length can be displaced along at least the entire width of the provided running path of the whole-width paper web 02 (M1.02, M2.02, M3.02, M4.02, M5.02, etc.) and, further than that, can be
moved toward the right completely out of the running path of the whole-width paper web 02, or out of the running path of the right half-width partial paper web 04.
The displacement of the left deflection device, or turning bar 14 is structured in such a way that its entire length can be displaced along at least the entire width of the provided running path of the whole-width paper web 02 (M1.02, M2.02,
M3.02, M4.02, M5.02, etc.) and, further than that, can be moved toward the left completely out of the running path of the whole-width paper web 02, or out of the running path of the right half-width partial paper web 04. The movements of the two
deflection devices 13, 14 can take place together or individually in the same direction.
The fastening carriage 16 can be displaced interlockingly across a straight upper guide device 52 such as, for example, a dovetail guidance device, which can be a component of a cross arm 69, by use of a motor drive 33 with a gear, and is
arranged to be fixed in place. The cross arm 69, and therefore the straight upper guide device 52, extend horizontally between a left short lateral frame 23 and a right short lateral frame 37 and is fastened on the insides of the latter, all as seen in
FIG. 1.
A motor drive 34 supported on the transverse frame 08, or on one of the short lateral frames 23 or 37 could be provided as the drive mechanism for the fastening carriage 16. Motor drive 34 can be, for example, an electric servo motor 34 with an
angle of rotation transducer 39 flanged to it. The latter is respectively used for determining the actual value of the position of the respective carriage 16, on which one or both of the deflection devices or turning bars 13, 14 are fastened.
Furthermore, an electronic control device with an arrangement for presetting a position reference variable, a device for performing the comparison of the reference variable with the actual value, and an actuating device, not represented, for generating a
manipulated variable to be fed to the drive 34, are provided for carriage 16. An accurate, and also presettable, positioning of the deflection devices or turning bars 13, 14 is possible.
An exactly positionable linear drive, such as a traction spindle 40, which is interlockingly connected with the carriage 16, for example, or another worm gear, is particularly suited for this.
For supporting the turning bars 13, 14, if they are not to be arranged in a cantilevered manner, their respective ends 28 and 51 close to the guide roller 11 and remote from the carriage 16, can be connected by a cross arm 42. A left guide block
62 and a right guide block 63 are welded to the cross arm 42, each of which guide blocks 62 and 63 has a sliding bore. The guide blocks 62, 63 are threaded on the upper guide rod 59 with a close sliding fit. The two upper deflection devices or turning
bars 13,14 can be displaced horizontally in the transverse running directions QR and QL.
The carriage 16 can be slid back and forth between the left short lateral frame 23 and the right short lateral frame 37 in the left and right transverse direction in such a way that the ends 28 and 51 of the upper turning bars 13, 14 near the
deflection roller 11 can be displaced as fully as possible over the entire length of the deflection roller 11, or over the path of the maximal paper web width b54.
The turning bars 13,14 can, of course, be air blown in the known manner, at least at the places of their shells around which a partial paper web loops.
The exteriorly located, right extreme lateral generating line, SML13 of the right deflection device or turning bar 13 and the left extreme lateral generating line SML14 of the left deflection device or turning bar 14, or their extensions, form an
opening angle .beta.=90.degree.. The same applies to the farthest innermost lateral generating lines, for example the left inner line IML13 of the deflection device 13 and the right inner line IML14 of the deflection device 14, or their extension of the
two deflection devices 13, 14 also preferably form an opening angle .beta.=90 with the narrowest possible tolerance range. The opening angle .beta. is composed of the 45.degree. complementary angle .beta.13 and the complementary angle .beta.14.
One of the legs of the complementary angle .beta.14 lies on the lateral generating line SML14, or IML14, and the other leg on the median line 53 of the opening angle .beta..
The opening angle .beta.(=.beta.13+.beta.14) opens opposite the running direction L of the partial paper webs 03, 04 entering into the deflection devices or turning bars 13, 14, i.e. the angle opening .beta. points in the direction toward the
guide roller 11. Therefore the complementary angle .beta.13 also opens in the clockwise direction, and the complementary angle .beta.14 in the counterclockwise direction, each opposite the running direction L.
In this case, the highest generating line HML11 and the extension of the highest generating line HML13 form an angle of 45.degree., which opens in the direction toward the other deflection device 14.
In this case, the highest generating line HML11 and the extension of the highest generating line HML14, as seen in FIG. 7, form an angle of 45.degree., which opens in the direction toward the other deflection device 13.
If a paper web crosses below the deflection device or turning bar 14 in the preferred embodiment represented in FIGS. 2, 6 and 7, for example, the lowest generating line TML13 of the deflection device or turning bar 13 must lie in a third
horizontal plane E3, as seen in FIG. 6, which lies below the plane E1. The extreme right lateral generating line SML13 of the deflection device 13 lies in a vertical plane VE13 which is not represented.
Both with the left entry and the right entry, the highest generating line HML14 of the left deflection device or turning bar 14, and a highest generating line HML11 of the guide roller 11, and a highest generating line HML 13 of the right
deflection device or turning bar 13, can be located on the same horizontal plane, the plane E1 as seen in FIG. 6. This is, for example, achieved in that the largest diameter of the deflection device or turning bar 13 or 14, below which a partial paper
web 03, 04 is to cross, is less than the diameter of the other deflection device or turning bar 14 or 13, below which nothing crosses, assuming a circular diameter of the deflection rollers. Because of the different diameters of the deflection devices
or turning bars 13, 14, the lowest generating lines TML13 and TML14 of the participating deflection devices or turning bars 13, 14 lie on planes E2 and E3 of different heights, which planes can have a distance "a" from each other which is less than the
smallest diameter of the deflection devices or turning bars 14 or 13, for example between 0.8 and 25 mm. The distance "a" mainly depends on the maximum paper thickness and on the type of paper to be printed and is fixed during the construction of the
press and is shown in FIGS. 6 and 7.
The lowest generating line TML13 or TML14 of the deflection devices or turning bars 13 and 14 must always be located on a higher plane E2 when it is intended that a partial paper web 03 or 04 is to cross below it on its way to the laterally
arranged registration roller.
A third or lower horizontally displaceable deflection device or turning bar 29 is arranged below the two horizontally displaceable upper deflection devices or turning bars 13, 14. Turning bar 29 can be horizontally displaced in the left
transverse running direction QL and the right transverse running direction QR, i.e. toward and away from the registration roller 18.
The displacement of the third or lower deflection device or turning bar 29 is structured designed in such a way that turning bar 29 can be displaced over its entire length along at least the entire width of the intended running path of the
whole-width paper web 02 (M1.02, M2.02, M3.02, M4.02, M5.02, etc.) and, further than that, respectively in the direction toward the registration roller, in this preferred embodiment, toward the right, so that turning bar 29 can be moved toward the right
completely out of the running path of the ]whole-width paper web 02, or out of the running path of the right half-width partial paper web 04.
An end 66 of the third deflection device 29 close to the deflection roller 11, is fastened on a third guide block 67 having a guide bore. The guide block 67 has been displaceably threaded via its bore on the lower guide rod or the lower linear
guide 61. No separate drive mechanism is provided for the guide block 67. The other end of the lower turning bar 29, which is the end 64 remote from the deflection roller 11, is rigidly fastened on a second fastening or guide carriage 31.
The guide or fastening carriage 31, with its guide 10, is arranged displaceably and can be fixed in place interlockingly along a straight guide device 32, for example a dovetail guidance device, which can be a component of a cross arm 68, by use
of a motor drive 33 with a gear. The cross arm 68, and therefore the straight guide device 32, extends horizontally between the left short lateral frame 23 and the right short lateral frame 37 and is fastened on the insides of the latter.
The electric servo motor 33, with an integrated angle of rotation transducer 38, flanged to the left short lateral frame 23, is provided as the drive mechanism for the carriage 31. Angle of rotation transducer 38 is used for determining the
actual value of the position of the carriage 31, on which the lower deflection device or turning bar 29 is fastened. Furthermore, an electronic control device with an arrangement for presetting a position reference variable, a device for performing the
comparison of the reference variable with the actual value, and an actuating device for generating a manipulated variable to be f | | |
