DE20006995U1 - Device for processing continuous sheets or sheets of paper, cardboard or foil material - Google Patents

Description

Applicant: Mathias Bäuerle GmbH,

78103 St. Georgen/Schw.

Applicant No.: 105 6999

Designation: Device for processing continuous sheets or webs of paper, cardboard or film material.

Description

The invention relates to a device for processing continuous sheets or webs of paper, cardboard or film material which have passed through an upstream processing machine, for example a folding machine, individually or in multiple layers, with at least one tool for processing, in particular for cutting, perforating or creasing, which can be adjusted transversely to the direction of travel on one or more guides and can be fixed in precisely defined positions.

Devices of this type are already known (MBO, special work with additional equipment, Bindereport 4/1997, page 232 ff, "Heidelberg Finishing sets new standards", Bindereport 11/1999, pages 42 to 44).

NEYMEYER & PARTNER GbR, Patent Attorneys

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In this known use of such processing tools, only permanently mounted scales at the inlet and outlet of the folding unit are provided for the transverse adjustment of the individual cutting, perforating or creasing tools that are connected downstream of a folding machine, which are intended to enable the transfer of the tool positions from the folded sheet to the knife shafts. It is also known to use a gauge that can be attached to square crossbeams for the exact positioning of the tools.

Apart from the fact that this method of positioning the individual tools in a transverse direction, even when using special gauges, requires considerable attention from the operating personnel, the manual adjustment work also involves a considerable amount of time and is always associated with a residual uncertainty or inaccuracy.

The invention is based on the object of creating a device of the type mentioned at the beginning, with which it is possible in a simple and safe manner to adjust the individual processing tools with respect to a self-adjusting

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to bring the reference device exactly into a working position.

This object is achieved according to the invention in that the tool is provided with an electrical position sensor which, when the tool is moved relative to a stationary reference element, changes an electrical measured value and/or generates path-dependent adjustment signals, wherein the measured values or the adjustment signals each define the size of the transverse distance of the tool from a sheet guide element which can be adjusted in the direction of displacement and are fed to an electronic reference circuit of a processor and wherein the measured values or adjustment signals and/or their respective deviation or agreement from or with a manually entered position target value are shown on a display.

The particular advantage of the solution according to the invention is that the required tool positions can be entered using a suitable input unit, e.g. a keyboard in a processor and made visible on a display. The setting, even if it is done manually, is made possible with the help of the display on the

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Display is clearly visible. It is also possible to indicate when the specified tool position has been reached by means of additional optical or acoustic signals.

This not only makes the adjustment work much easier and faster, but also more precise. Above all, the adjuster can be sure that the specified position is correct in relation to the stationary reference element.

Rotary resistors or rotary potentiometers, which can be provided as position sensors according to claim 1, have long been used for such purposes. Their reliability is generally known, and they are also readily available as commercial goods at reasonable prices.

An important advantage is achieved by the design according to claim 3 in that the variable position of the sheet guide element used as a reference element is also included in the determination of the position display.

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This means that incorrect tool settings can be avoided with much greater certainty.

In this case, claim 4 provides a very simple and easily realizable possibility of converting the respective position of the sheet guide element into corresponding electrical values that can be processed in a processor.

The simplest and easiest way to adjust the individual tools is with the aid of the embodiment according to claim 5, because this makes it possible to enter the values to be adjusted, for example by means of a keyboard, into a reference circuit of the processor, which then calculates the adjustment paths of the individual tools separately and controls the electric drive accordingly.

With the help of the embodiment according to claim 6 it is ensured that the tools do not change their respectively set position during work.

The design according to claim 7 ensures that both tool parts are adjusted together in such a way that they exactly maintain their correct position relative to each other.

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Further advantageous embodiments of the invention are the subject of claims 8 to 10.

The invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1 in schematic simplified plan view a

Device for processing continuous sheets or webs of paper, cardboard or foil material, which is connected on the output side to a folding machine, to which the sheets or webs to be processed are fed via a feed station
be supplied;

Fig. 2 also shows, in a schematically simplified representation, a partially sectioned side view of the devices shown in Fig. 1;

Fig. 3 a display by means of which the working positions of several tools can be set and
can be made visible;

Fig. 4 shows a circuit diagram in a highly simplified representation;

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Fig. 5 shows the device shown in Fig. 1 and 2 for processing continuous sheets or webs in a simplified perspective view with only two tools that can be adjusted manually;

Fig. 6 shows a tool from Fig. 5 in side view; Fig. 7 shows a section VII-VII from Fig. 6;

Fig. 8 a device for processing continuous sheets or webs, also in a simplified perspective view with only two tools that are motor-adjustable;

Fig. 9 shows a tool from Fig. 8 in side view; Fig. 10 shows a section X-X from Fig. 9.

The device 31 shown in plan view in Fig. 1 for processing continuous sheets or webs of paper, cardboard or foil material has a plurality of tools W1 to W6, which are arranged individually transversely between two frame plates 1 and 2 on guides which consist of a rack 3, a guide rod 4 and a common drive shaft 5. The distance between the two frame plates 1 and 2 is divided into a left parking zone

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Pl and a right parking zone P2 as well as an intermediate working zone A. The total width of the two parking zones Pl and P2 is selected so that all tools Wl up to and including W6 can be placed in these parking zones Pl and P2 in order to have completely free passage in the working zone A.

This device 31 is arranged in the direction of travel of the arrow 10 immediately behind a folding machine 9, which is only shown schematically in Figs. 1 and 2.

In the direction of travel in front of the folding machine 9 there is a transport device 8 with several transport belts 13 guided over drive and deflection rollers 11 and 12 as well as with a sheet guide element 14, on whose guide surface 15 passing sheets 20 or webs of paper, cardboard, film material or the like are guided and aligned in the transverse direction.

This arch guide element 14, which has the shape of a guide rail, is adjustable by means of a threaded spindle 16 transversely to the direction of travel of the arrow 10. A hand crank 17 is provided for turning the threaded spindle 16. This threaded spindle 16 is connected to an electrical or electronic position sensor 30. This can consist of a rotary potentiometer 30 to which an electrical voltage is applied which is proportional to the revolutions of the threaded spindle 16 and thus also pro-

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proportional to the transverse reference position of the sheet guide element 14 or its guide surface 15, or the reference position changing in the direction of the threaded spindle 16.

Another possibility to represent the respective reference position of the sheet guide element 14 in processable electrical values is to generate counting pulses, for example by means of a perforated disk and a light barrier.

The position sensor 30 is connected to a microprocessor 40 in such a way that the latter registers the respective positioning values of the sheet guide element 14.

The position of the guide surface 15 located in the guide plane 21 is defined in the microprocessor 40 as a zero or reference position, from which the tool positions of the tools W4, W5 and W6 indicated by the lines 35, 36 and 37 have certain defined distances.

These distances are shown in a display 50, which is connected to the microprocessor 40, as arrows 0, 80, 210 and 391 with the associated position values. When adjusting the tools W4, W5 and W6, these actual position arrows with the displayed position values 0, 80, 210 and 391 move along a horizontal line 51, above which the position target values are shown by vertical line markings 52, 53 and 54.

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e.g. 80, 210, 392 are displayed. These target position values can be entered into the microprocessor using an input unit 60. The target position values are also displayed in numbers, for example 80, 210 and 392.

It can be seen that the two tools W6 and W5 have already reached their target position, while the tool W4, to which the arrow 391 is assigned, is still one unit away from the target value 392.

The operator who positions the individual tools W1 to W6 in the work zone A can thus easily orient himself using the display in the display 50. The rectangular frame 55' visible in the display 50 also shows the width of the paper format of, for example, 420 mm, with the two narrow edges 56 and 57 representing the minimum value of zero and the maximum value of, for example, 420 mm.

In order to be able to make the respective actual positions of the tools located within the working zone A, e.g. W4, W5 and W6, visible in the display 50, all

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The tools W1 to W6 are each provided with an electrical position sensor 23 which, when the tool is moved relative to a stationary reference element, changes an electrical measured value and/or generates path-dependent adjustment signals, e.g. counting pulses, and transmits these to the microprocessor 40.

As already mentioned, these measured values or adjustment signals of the individual position sensors 23 each define the transverse distance of a tool W4, W5 and W6 located in the working zone A from the sheet guide element 14 or its guide surface 15.

These measured values or adjustment signals are processed in an electronic reference circuit of the microprocessor 40 and, as described above, displayed on the display 50.

The position sensors 23 preferably consist of a rotary resistor or a rotary potentiometer, the pickup element of which is in play-free engagement with the reference element designed as a rack 3 via a gear 25. This reference element is arranged as a rack 3, running transversely to the direction of travel of the arrow 10, in a stationary manner between the two frame plates 1 and 2.

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To fix the respective working position, the tools W1 to W6 are each provided with a clamping screw 26, the vertical threaded shaft 26' of which presses on the top of the rack 24 when tightened.

As can be seen from Figs. 5 and 6, the tools W1 to W6 each consist of an upper part WO and a lower part WU, each of which is provided with cutting or grooving disks 28 and 29 which interact in pairs in a horizontal passage plane 33.

The two upper and lower parts WO and WU of the individual tools W1 to W6 each have a fork-shaped frame body 61 or 62. Two transport rollers 67, 68 or 69, 70 are arranged between fork legs 63 and 64 or 65 and 66, which are open on the inlet side. These transport rollers 67 and 68 or 69 and 70 are connected to one another in pairs by toothed belts 71 or 72 and are thus driven synchronously and in the same direction (Fig. 2).

The transport rollers 67 and 69 are each seated on drive shafts 5 and 6, which in turn are connected to one another by gears 73 (Fig. 5). The drive shaft 5 is driven by a toothed belt 74 from a shaft 75 of the folding machine 9 (Fig. 1).

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The drive rollers 67 and 69 are driven by the drive shafts 5 and 6, respectively, via one-way clutches 75 and 76, which are preferably designed as roller locking mechanisms.

The other two drive rollers 68 and 70 are each arranged in a rotationally fixed manner on their bearing shafts 77 and 78, on which the cutting or grooving disks 28 and 29 are also fastened. The bearing shafts 77 and 78 are each rotatably mounted in the fork legs 63 and 64 or 65 and 66 of the frame bodies 61 and 62, respectively.

The lower tool part WU is guided in a stable position, i.e. non-pivotable, by means of a fitting bore 81 on a second guide rod 80 running parallel to the drive shaft 6 and can be fixed on this guide rod 80 by means of a clamping screw 27 which can be tightened manually.

The upper tool part WO, however, can be pivoted about the axis of the drive shaft 5 by the angle α, so that the two tool disks 28 and 29 can be lifted away from each other so that the tool in question is ineffective

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However, the two transport rollers 67 and 69 remain in contact.

In order to achieve this pivoting capability, the reference element designed as a rack 3 is arranged in a recess 44 of the frame body 61, which enables such a pivoting movement when the clamping screw 26 is loosened. This pivoting movement is brought about by a compression spring on the underside of the rack 24 when the clamping screw 26 is loosened accordingly.

The gear 25 of the position sensor 23 is also arranged in a recess 4 6 of the frame body 61. The position sensor 23 is fixed with its gear 25 by a cover plate 47 which is screwed on in a removable manner.

While the tools W4 and W5 shown in Fig. 5, 6 and 7 can only be moved transversely manually and brought into the desired working position when the clamping screws 26 and 27 are loosened, tools W4 and W5 are shown in Fig. 8, 9 and 10 which can be adjusted transversely by means of a motor drive.

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For this purpose, the reference element is designed as a double toothed pliers 3', with the front toothing 25' of which the gear 25 of the position sensor 23 is in engagement. A drive gear 85 of the drive shaft 84 of an electric adjustment motor 86 is in engagement with the second, rear toothing 83, which is controlled by the microprocessor 40 or by its electronic reference circuit.

In order to ensure that the lower tool part WU is also precisely driven, a vertical coupling pin 88 is provided which is guided in a vertical hole 89 of the upper frame body 61 and can be introduced into the coaxial hole 89' of the lower tool part WU, i.e. the frame body 62, by overcoming a return spring 87. In order to enable this to take place automatically, an actuating rod 90 is provided which runs horizontally and transversely over this coupling pin 88 of the individual tools W4, W5. This actuating rod 90 is attached to pivot levers 91 and 92 which are pivotably mounted on the outside of the frame plates 1 and 2 and are coupled to electrical actuating magnets 93 and 94. The actuating rod 90 extends through arcuate recesses 95 in the two frame plates 1 and 2.

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The control of the two actuating magnets 93 and 94 for the actuating rod 90, by means of which the automatic coupling between the upper parts WO and lower parts WU of the individual tools W1 to W5 can be accomplished, can also be triggered by a control pulse generated by the microprocessor 40.

Using a special input unit 100, it is possible to program the servomotors 86 of the individual tools W1 to W6 individually for the respective desired working position. All that is required is to enter a corresponding identifier that is individually assigned to each tool W1 to W6. A corresponding computer program then determines the adjustment path that must be covered from the current position to the desired working position.

During the passage of sheets or webs through the tools located in the working zone A, the coupling pins 88 must again assume the rest position shown in Fig. 2. This is brought about by the aforementioned return springs 87 as soon as the two actuating magnets 93 and 94 are switched off again,

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after the respective setting of the individual tools Wl to W6 has been completed.

In order to fix the individual tools in these working positions, the lower parts WU can be fixed by means of a camshaft 105, which each extends through a continuous recess 106 and which can be rotated from the ineffective rotational position shown in Fig. 9 into the clamping position shown in Fig. 2 by means of an electromagnet 103 acting on a lever arm 104.

The upper tool part WO is provided with an electromagnet 107 which, when appropriately controlled, presses a brake piston 108 from above onto the double rack 3' and thereby effects both the transverse fixation and the holding of this upper tool part WO in its working position shown in Fig. 9.

This electromagnet 107 thus replaces the clamping screw 26 of the only manually adjustable tools, also with regard to the pivoting of the tool upper part WO by the angle α into the ineffective rest position, in which only the two transport rollers 67 and 69 are in contact with each other, but no longer the cutting or grooving disks 28 and 29 and the

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the same shaft 77 or 78 seated transport rollers 68 and 70. The compression springs 45, by which the pivoting by the angle α is effected, are also present on the upper parts WO of the electrically adjustable tools W1 to W6.

Claims (10)

1. Device for processing continuous sheets or webs of paper, cardboard or film material which have passed through an upstream processing machine, for example a folding machine ( 9 ), individually or in multiple layers, with at least one tool (W1 to W6) for processing, in particular for cutting, perforating or grooving, which can be adjusted transversely to the direction of travel on one or more guides ( 3 , 4 , 5 ) and can be fixed in precisely defined positions, characterized in that the tool (W1 to W6) is provided with an electrical position sensor ( 23 ) which, when the tool is moved relative to a stationary reference element (rack 3 , 3 '), changes an electrical measured value and/or generates path-dependent adjustment signals, the measured values or the adjustment signals each defining the size of the transverse distance of the tool (W1 to W6) from a sheet guide element ( 14 ) which can be adjusted in the direction of movement and an electronic reference circuit of a processor ( 40 ) and wherein the measured values or adjustment signals and/or their respective deviation or agreement from or with a manually entered position setpoint ( 52 , 53 , 54 ) are shown on a display. 2. Device according to claim 1, characterized in that the position sensor ( 23 ) is a rotary resistor or a rotary potentiometer, the rotatable pick-up element of which is in engagement via at least one gear wheel ( 25 ) with a stationary rack serving as a reference element ( 24 ). 3. Device according to claim 1 or 2, characterized in that the transversely adjustable sheet guide member ( 14 ) is also assigned an electrical or electronic position sensor ( 30 ), the measured value or position signal of which forms the reference value for the tool position values ( 52 , 53 , 54 ) to be set and is registered in a processor ( 40 ) determining the deviations or correspondence. 4. Device according to claim 3, characterized in that the sheet guide member ( 14 ) is transversely adjustable by means of a stationary threaded spindle ( 16 ), the rotary movements of which are transmitted to the pickup member of a potentiometer serving as a position sensor ( 30 ). 5. Device according to one of claims 1 to 4, characterized in that the tool (W1 to W6) is provided with an electric adjustment motor ( 86 ) which is controlled by the reference circuit of the processor ( 40 ) and whose drive shaft ( 84 ) is geared to the stationary rack ( 3 '). 6. Device according to one of claims 1 to 4, characterized in that the tools (W1 to W6) each consist of an upper tool part (WO) and a separate lower tool part (WU), which can be fixed by means of clamping devices ( 26 , 27 ). 7. Device according to one of claims 1 to 6, characterized in that the position sensors ( 23 ) and the adjustment motors ( 86 ) which may be present are each arranged on the upper tool part (WO) and that the two tool parts (WO and WU) can be rigidly connected to one another by means of at least one manually or electrically actuated coupling element ( 88 ) for the purpose of their common transverse adjustment. 8. Device according to one of claims 1 to 4, characterized in that both tool parts (WO and WU) each have a drive shaft ( 5 , 6 ) coupled to a transport roller ( 67 , 69 ) and to the cutting, perforating or grooving tool ( 28 , 29 ), which are in engagement with one another. 9. Device according to one of claims 6 to 8, characterized in that at least one of the two tool parts (WO or WU) is pivotable on its drive shaft ( 5 , 6 ) relative to the other tool part (WU or WO). 10. Device according to one of claims 1 to 9, characterized in that all existing tools (W1 to W6) can be brought on their guides and drive shafts, optionally distributed on two sides of the throughput track, into parking zones (P1, P2) which lie outside the throughput track or the working zone (A).