EP1052199A1 - Device for processing form webs - Google Patents

Abstract

A device has two guiders (12,14) for each form run fitted over each other and operating in a common direction with a joint separating device (11). Other devices (162,164,17) control a selective, sequential cycle for feeding in each form run. Each of t devices has a separate driven roller (182,184) stretching across the operating width. Two or more non-driven idling rollers (192,194) feed in the form runs.

Description

The present invention relates to a device for Processing of form webs by selective-sequential intermittent feeding and cutting of form webs; such devices are of a type e.g. from the Brazilian patent 7701019 (1977), the Swiss Patents 661 709 and 661 710 (1984), the European patent 156 775 (1984) and the German utility model G 85 04 658 (1985). Devices of this type are particularly for the automated production of printed matter, like checkbooks, merging and inserting Proof of payment, and the like used.

Common to such devices is that two separate ones Form webs that are on top of each other or laterally largely overlap, each individually, i.e. selective-sequential advanced and cut across the working direction can be.

The feed is cyclical in these facilities, i.e. for one or all form lanes by one Form length, using so-called tractors, i.e. Spiked wheels or barbed ribbons, the spines in the usual Perforated edges on one or both sides of the form webs intervention. The term "selective-sequential" means doing that the cyclical feed through a program or / and can be controlled by form markings, e.g. by the one or "first" after the feed cycle Form path one or more feed cycles of the other or follow the "second" form and only then again a feed stroke of the first form path runs like this is known in such systems.

It was generally accepted in the professional world that such Type of feed only with spiked wheels or belts and correspondingly perforated form sheets with edges the required accuracy can be achieved. One therefore accepted the disadvantage that edge perforated paper must be used and facilities for separating the side edge tape is required. Moreover cause the severed border strips a considerable Volume of waste paper that is removed and disposed of got to.

It would therefore be desirable to have a device at the beginning mentioned type, which the use of edge paper webs avoid and still accurate feed which would enable form webs. Object of the invention is to provide a device that meets these requirements Fulfills.

It would be obvious to replace the tractors for each form web e.g. for continuous processing of paper, plastic or textile webs usual pairs of transport rollers to use where the two rollers of the pair of rollers lie against each other and driven in opposite directions so that one is inserted into the nip Material web from the rollers in the common direction of rotation the rollers are advanced at the nip.

The investigations leading to the present invention have however, it is shown that in this way the most up to date Devices of the type mentioned with their high processing speeds of 1 - 4 m / sec required Feed accuracy cannot be achieved, in particular not with prolonged operation and the then inevitable e.g. through contaminants, paper dust and the like conditional changes in the interaction between the Form web and the rollers.

Surprisingly, the one on which the invention is based Object to be achieved according to the invention in that each the towards the cutting device on converging levels guided form tracks to achieve a cyclical sequential-selective feed to a single driven Roller is guided with adjacent idler rollers cooperates and has two parts by one Differential gears are connected to each other to make unevenness of the feed, which e.g. due to contamination or other side effects of a result in rapid and sustained operation of the device can.

According to a first general and preferred Embodiment of the invention on the continuous Main axis that extends across the working width and only on one side with a drive for rotating the axis is connected, two rotatably arranged about the main axis cylindrical and with respect to the longitudinal center line of the associated Serve form sheet symmetrically formed sleeves; the differential gear can in a manner known per se have two bevel gears, each of which is torsionally rigid one of the two sleeves is connected; the operative connection this bevel gear is made up of two differential bevel gears, which are freely rotatable about a common axis, which perpendicular to the main axis, e.g. in a corresponding cross extending bore of the main axis, is arranged.

The differential gear according to the invention has an analog one Effect like the well-known differential gear on the driven Wheels of a car making a turn which changes the drive speed of the wheels Radii of the curve traversed by each wheel adjusts. Only on a straight route - here with an exact one Straight ahead of the respective form web - both will Sleeves driven at exactly the same speed. The Differential gear used according to the invention between the two sleeves on the main axis causes one lateral deviation from the normal straight running direction a deviation in the form of the differential gear is automatically compensated and corrected.

According to a first general embodiment the invention therefore a device for processing Form webs through selective-sequential, step-by-step feed and cutting at least two form sheets with the features specified in claim 1. Prefers Designs of the device according to the invention have features specified in claims 2-7.

The invention further relates to a method for operating a Device according to the invention with the in the claims 8 and 9 specified features.

Finally, the invention relates to a method for processing of form webs through selective-sequential intermittent feed and cutting of at least two form webs with the features specified in claim 10.

The differential gear is according to a preferred embodiment the invention a mechanical transmission per se known type, the two drive bevel gears and two differential bevel gears owns; each of the drive bevel gears is rigidly connected to one of the sleeves; the two differential bevel gears are rotatable about a transverse axis connected to the main axis and e.g. through this is led; each of the drive bevel gears stands in engagement with the two differential bevel gears.

In such a mechanical transmission, the drive and / or the differential bevel gears according to a preferred one Embodiment designed as toothed bevel gears, preferably self-lubricating, i.e. at least one of each other engaging bevel gears or toothed bevel gears at least on the outside of a self-lubricating polymer, such as polyamide, polyacetal, polyester. The optimization the material selection for the differential gear wheels and also for all other parts of the device according to the invention lies in the area of knowledge of professionals.

In general, the friction surfaces, i.e. the one with the associated form web coming into contact surface of the through the differential gear sleeves with an abrasion-resistant elastomer, especially an elastic one Material, e.g. synthetic or natural Elastomer, such as rubber, polyurethane, polyisoprene, or the same shows that typically a Shore hardness A in the range from 80-100, typically 90-95.

Furthermore, the friction effect of the sleeve surface can also through the surface condition or surface structuring be achieved, e.g. due to surface roughness and / or pattern-like or statistically distributed profiles respectively. Surfaces or surface areas can also be used for this made of abrasion-resistant materials including metal, ceramics, glass and hard materials (Sintered metal, metal carbide, nitride coatings, Diamond, boron nitride), e.g. sufficient in the form of embedding fine grains of such hard materials in one Layer of metallic or non-metallic binder.

There is also an optimizing choice for the friction surface Material selection taking into account the above Again, information in the area of professional knowledge.

In general, every guide is on the form lanes both sides with at least two opposite one another Contact points for concerns on both sides of the associated form web, and the contact points are in the working direction of the device, i.e. the direction of travel the webs, at least by the working width of the device spaced, in front of the associated driven Roller. It is understood that these contact points can be positioned, be it to adapt to different ones Form widths, be it for fine adjustment of the Form introduction.

The invention also relates to a method for operating the new device; this will make everyone sequentially selective Feed cycle of the form path an acceleration phase, assigned a movement phase and a braking phase; the acceleration phase is determined by one of the desired Form corresponding signal triggered and the regulation of the feed of the form web takes place on one point determined by the form length.

The form web has, in a manner known per se, e.g. Markings created by printing, their optical Reading that corresponds to the desired form length Control signal triggers; the movement is indicated by an known control electronics that controls the actual value of the feed trigger point with its setpoint and regulates the drive from the difference.

Figur 1 eine schematische Darstellung einer erfindungsgemässen Vorrichtung;

Figur 2 eine halbschematische Schnittansicht der angetriebenen Walze einer erfindungsgemässen Vorrichtung;

Figur 2a eine vergrösserte Darstellung des Ausgleichsgetriebes der Walze von Fig. 2;

Figur 3 das Schema eines Vorschubtaktes und

Figur 4 die schematische Draufsicht auf eine Führung mit einer Formularbahn und der zugehörigen angetriebenen Walze.

The invention will now be explained with reference to the accompanying drawings using preferred but non-limiting exemplary embodiments. Show it:

Figure 1 is a schematic representation of an inventive device;

FIG. 2 shows a semi-schematic sectional view of the driven roller of a device according to the invention;

Figure 2a is an enlarged view of the differential gear of the roller of Fig. 2;

Figure 3 shows the scheme of a feed stroke and

Figure 4 is a schematic plan view of a guide with a form web and the associated driven roller.

The device 1 shown schematically in FIG. 1 has two converging guides 12, 14 for the form webs B ¹ , B ² , which are fed to the device from a source, not shown, for example a magazine or a longitudinal separating device for a double-sided printed form web. The form tracks are on the side of the guides 13, 15 (only the guide at the front is shown). Each of the form webs B ¹ , B ² runs between the associated driven roller 182, 184 and the non-driven abutting roller 192, 194 attached to it under slight pressure of typically 50-500 g to the cross cutting device 11, which, for example, is known per se as a "guillotine" with a Cutting bar or knife and one or two cutting edges, can be designed as a rotating knife or the like.

Each of the two rollers 182, 184 is connected to an associated drive 162, 164, for example an electric motor, the activity of which is regulated by a controller 17 in order to guide both form webs B ¹ , B ² or only one of these to the cross-cutting device 11.

The structure of the driven rollers 182, 184 is shown in FIG. 2 explained using a semi-schematic sectional view. Each roller has a one-piece and continuous Main axis 20 made of a rigid material, typically steel, Aluminum or the like at both ends 201,202 rotatably guided in the bearings 204, 205 and on one side, here e.g. the end 201, with a drive motor, not shown connected is.

On the main axis 20 there are two sleeves 21, 22 between two stop pieces 206, 207 connected to the axis 20 are rotatable guided around the axis on this. Each sleeve is typically made made of a rigid material such as steel, aluminum or thermosetting plastic and has a friction lining 219, 229, e.g. made of an elastic polyurethane (e.g. Vukollan® the Bayer AG) or from a coating of fine-grained Provide hard material in a suitable matrix material.

Each sleeve lies in the area of its friction lining 219.229 the associated pressure roller 29a, 29b to the form web press sufficiently against the friction lining, that the form web (not shown in FIG. 2) at Actuation of the drive (not shown in Fig. 2) is transported practically without slippage.

The two sleeves 21, 22 are in the area of the middle of the Main axis 20 through the differential 24 with each other connected, as shown enlarged in Fig. 2a. The differential 24 consists of two drive bevel gears 211, 221, which are designed as bevel gears and each torsionally rigid connected to the associated sleeve 21,22 are. The operative connection of the drive bevel gears 211, 221 or the sleeves 21, 22 rigidly connected to these by two differential bevel gears also designed as gear wheels 261, 262, which can be freely rotated about the auxiliary axis 28 are and with the drive bevel gears 211.221 in engagement stand.

The auxiliary axis 28 lies in a transverse bore of the main axis 20 and is carried along by their rotation, i.e. rotates in the radial direction. The auxiliary axis 28 can be axial be rotatable, but this is usually without practical Importance. It is essential that the differential gear 24 only comes into effect if it is on the form web adjacent sleeves 21, 22 not equally during transport involved. Such an inequality can e.g. then occur when soiling caused by paper dust during continuous operation or the like, which would result in that the form path is no longer exactly straight, i.e. perpendicular to the cross cutting device, runs. In this case the differential 24 an immediate correction and thereby guarantees a typical continuous operation Form web speeds of 1 - 4 m / sec reliable guidance of the form web.

A preferred control or regulation of the drive of the main axis 20 is shown in the diagram of FIG. 3. The electric motor causing the drive is controlled in such a way that the initially stationary form web first accelerates during a start-up phase B _acc and is then guided through the movement or feed phase B _mov at a practically constant speed until the start of the braking phase B _br . To control the drive, according to a preferred embodiment of the operation of the device according to the invention, the transition from phase B _mov to phase B _{br is used} and the braking process is dimensioned such that the form web is exactly in the position controlled in the usual manner, for example by printed markings Cross cutting device is positioned.

In practice, this expediently takes place in such a way that each sequential-selective feed cycle of the form web (B ₁ , B ₂ ) is generated by a signal corresponding to the desired form length and triggered by markings on the form web and the regulation of the feed of the form web at the one determined by the form length Trigger point occurs. The reading can be triggered in a manner known per se, for example by optically reading the marking on the form web. The movement is controlled by control electronics that compare the actual value of the position of the trigger point with its setpoint and use the difference to control the drive.

Fig. 4 shows a broken part of the guide 42 a inventive device with the lying thereon Form web 43, which has a center line M and a width B owns. The edge guides 45a, 45b are in one Distance L in the running direction (arrow A) in front of the driven one Roller 44 is arranged remotely, with the distance L preferably is at least as large as the width B of the Path 43. The pressure rollers 49a, 49b are symmetrical to Arranged center line M of the form web and press the Form web in the area of the friction linings against the roller, which is connected to the drive 46 via the axis 40 and actuating the roller in the manner set forth above controls or regulates.

The exemplary embodiment set out above serves to explain and not to limit the invention and generally provides a device for processing form webs by selectively sequential feed and cutting of at least two form webs (B ₁ , B ₂ ); the device has at least two guides arranged one above the other and converging in the common working direction towards a common transverse separating device, each for one form web; if more than two form lanes are to be processed, the number of tours is of course correspondingly larger; the device has devices for controlling the cyclically sequential-selective feed of each form web, each of the devices for the sequential feed of each form web each comprising a driven roller which extends transversely to the working direction over the working width of the device and interacts with at least two non-driven idler rollers; the driven roller has a continuous main axis which is connected on only one side to a drive for rotating the continuous main axis; this main axis carries two cylindrical sleeves which can be rotated about the main axis and are operatively connected to one another via a mechanical or other differential mechanism.

Claims (10)

Device (1) for processing form webs by selectively sequential feed and cutting of at least two form webs (B ₁ , B ₂ ), which device has at least two guides (12) arranged one above the other and converging in the same working direction to a common cross cutting device (11) ; 14) for each form web, and wherein the device has devices (162; 164; 17) for controlling the cyclically sequential-selective feed of each form web, characterized in that each of the devices for the sequential feed of each form web has a driven roller ( 182; 184), which extends transversely to the working direction over the working width of the device and interacts with at least two non-driven idler rollers (192a, 192b; 194a, 194b), the driven roller having a continuous main axis (20) which is only on one of its two ends (201) with a drive for rotation the continuous main axis is connected and this main axis has two cylindrical sleeves (21; 22) which can be rotated about the main axis and which are operatively connected to one another via a differential (24). Device according to claim 1, characterized in that the differential (24) is a mechanical transmission, the two drive bevel gears (211; 221) and two differential bevel gears (261, 262), each of the drive bevel gears torsionally rigid connected to the associated sleeve (21,22) and the two differential bevel gears are rotatable by one Transverse axis (28) are arranged with the main axis is connected with each of the drive bevel gears engaged with the two differential bevel gears. Device according to claim 2, characterized in that the drive and / or differential bevel gears (211,221; 261,262) are designed as toothed bevel gears. Device according to one of claims 2 or 3, characterized characterized that the drive and / or the differential bevel gears (211,221; 261,262) self-lubricating are, e.g. by engaging with each other at least at their standing surfaces made of self-lubricating polymers consist. Device according to one of claims 1-4, characterized in that that the each of the sleeves (21,22) with friction surfaces (219,229) made of a rubber-elastic material, e.g. with a Shore hardness A of 80 - 100. Device according to one of claims 1-4, characterized in that that the friction surfaces come in handy rigid material and a structured surface, e.g. Roughness, especially due to an adherent fine-grained hard material. Device according to one of claims 1-6, characterized in that that each of the guides (12, 14) for the form tracks (B1, B2) two opposing contact points (13a, 13b; 15a; 15b) for contact on both sides the associated form web and the contact points in the direction of flow at least by the working width of the Device spaced in front of the associated roller (182; 184) is arranged. Method for operating a device according to one of claims 1-7, characterized in that each sequential-selective feed cycle of the form web (B ₁ , B ₂ ) to the cross-cutting device (11) has an acceleration phase (B _acc ), a movement phase (B _mov ) and one Braking phase (Bbr) comprises, the acceleration phase being triggered by a signal corresponding to the desired form length and the regulation of the advance of the form path taking place at a trigger point determined by the form length. A method according to claim 8, characterized in that the form path bears markings as trigger points whose Reading that corresponds to the desired form length Signal triggers, the location of the trigger point by a control electronics is controlled, the actual value compares the trigger point with the setpoint and from the Difference causes the control of the drive. Method for processing form webs by selective sequential feed and cross-cutting of several form webs, in which method at least two form webs (B ₁ , B ₂ ) guided one above the other are fed in converging planes to a common cross-cutting device (11), characterized in that the feed each form web is effected by a single driven roller (182; 184) which extends transversely to the working direction over the working width of the device and interacts with at least two non-driven idler rollers (192a, 192b; 194a, 194b)), the driven roller has a continuous main axis (20) which is connected only at one of its two ends (201) to a drive for rotating the continuous main axis, and this main axis has two cylindrical sleeves (21; 22) which can be rotated about the main axis and which are connected via a Differential gears (24) are in operative connection with each other.

Images