JP2002544097A - Equipment for processing paper strips - Google Patents

Abstract

The device (1) for processing at least one strip of forms by means of controlled or clocked advancement of said strip (B1) has at least one guide (12) for said strip extending towards a crosswise separating device (11) therefor. The device comprises a mechanism (17; 162) for controlling the advancement of the strip. The mechanism for advancing the strip has a driven roller (182) for each strip, extending perpendicularly to the working direction over the working width of the device and cooperates with at least one pressing device (192), i.e. at least one non-driven idling roller or several of such rollers, in order to advance said strip. The driven roller has a continuous main shaft (20) which is joined on the ends thereof to a drive for rotation of the continuous main shaft. At least one pair of cylindrical bushings (21; 22) which can rotate around said main shaft and interact with each other by means of a differential gear (24) are borne on the main shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD The present invention relates to an apparatus for processing a paper band by feeding and cutting forward while controlling the paper band. Such a device is known, for example, from German Utility Model No. 85 04 658 (1985) and EP-A 0 156 775. Devices of this kind are used, in particular, for automatic processing of continuous paper, i.e. for cutting paper strips, focusing on matching pieces and, moreover, basically placing them in envelopes.

BACKGROUND OF THE INVENTION European Patent Application Publication No. 0 510 324 also relates to the processing of continuous paper. In this case, the paper strip is transported by a circulating strap which is in close contact with it.

The technical background of the present invention also includes EP-A-0 556 640, which discloses a so-called capstan roller for a thermal printer. The roller for the paper to be printed consists of three segments, which are connected to each other by a differential drive to match the average speed of the segments at both ends to the speed of the intermediate segment.

[0004] In the device described in the first paragraph, the paper strip is fed forward or discontinuously forward and cut into individual pieces having a predetermined length transverse to the working direction. In such a way, the forward feed is effected by means of a so-called tractor, ie a barbed gear or barbed strap whose barb engages a conventional edge perforation in one or both of the webs. The control of the forward feed can be performed mechanically, electrically or electronically, for example electro-optically, for example using programs and / or indicia on the paper, as required for each paper length.

[0005] In general, those skilled in the art will recognize that this type of forward feed can be achieved using barbed gears or barbed straps and correspondingly perforated strips at their edges. Had been. Therefore, there is an inconvenience that a sheet having a hole at the edge must be used, and a means for cutting off the edge hole band on the side surface is required. In addition, the cut edge perforations were too much paper waste to be removed and disposed of.

DISCLOSURE OF THE INVENTION [0006] It is therefore possible to obtain an apparatus as described in the first paragraph, which makes it possible to feed the paper band precisely forward, while avoiding the use of a paper band with an edge band. desirable. It is an object of the present invention to enable the use of paper strips without edge holes, so that the cut-off edge holes do not cause dirt, and the side of the paper strip or the paper formed therefrom can be used. It is an object of the present invention to provide an apparatus which satisfies these requirements without requiring any means for cutting.

[0007] Instead of a tractor for the forward feeding of a paper strip, it is used for the continuous processing of a continuous strip of paper, plastic or fabric, typically a processing station or cutting the strip. Attempts to use transport means having a conventional roller pair, which is at least one roller pair having a drive to drive in opposite directions for continuous or cycle forward feed to the station, have produced the desired results. Did not connect.

[0008] Especially from the work leading to the present invention, this method requires a fast processing speed of 1 to 4 m / sec and a timely forward feed for processing printed paper bands. It has been found that precision cannot be achieved, and that unavoidable changes in the interaction between the paper band and the rollers, caused by dirt, paper dust, etc., occur, especially when used for a long time.

Surprisingly, the object of the invention described above is to provide a driven roller, for example, which is closely but driven, in order to achieve a sufficiently accurate forward feed of the paper strip in the correct direction. Working with at least one pressing means which is not driven roller or equivalent means, for example in forward feeding due to dirt or other side effects by driving the device at high speed and continuously To adjust for non-uniformities, it can be eliminated by guiding the paper strip with two parts connected together by a differential gear.

For this purpose, according to a first, general and preferred embodiment of the invention, the device extends over the working width of the device (ie, the width of the strip to be processed) and is pivoted on one side only. At least one pair of housings, connected to a drive for movement, rotatable about a continuous main shaft and arranged substantially symmetrically with respect to the longitudinal centerline of the corresponding paper web. , Whereby the housings adjacent to these vertical center lines can be connected by a differential gear. The differential gear has two bevel gears, each bevel gear being non-rotatably connected to a housing adjacent to a longitudinal centerline of at least one of the housings. The operative connection of these bevel gears is rotatable about a common axis, each of which is provided perpendicularly to the main axis, for example through a corresponding bore provided transversely to the main axis. Obtained by two differential bevel gears.

The differential gear according to the invention has the same effect as the known differential gear in the driven wheels of a vehicle in which the speed of the wheels during a curve run is matched to the different diameters of the curve being run by each wheel. Have. Only when traveling straight (in this case, each paper strip runs exactly straight), both housings are driven at exactly the same speed.
The differential gear provided between adjacent housings on the main shaft used in the present invention is configured such that when the paper band deviates laterally from the normal linear running direction, the deviation is automatically controlled by the differential gear. Has the effect of being compensated and corrected.

[0012] According to a first, general embodiment, therefore, the present invention provides for cutting at least one sheet of paper continuously or cycle by cycle, having the features of claim 1. And an apparatus for processing paper strips. Preferred embodiments of the device according to the invention have the features of claims 2-7.

The invention furthermore relates to a method for operating a device according to the invention having the features of claims 8 to 9.

Finally, the present invention relates to an apparatus for processing a paper strip by cutting at least two paper strips, continuously or forward-forward, having the features of claim 10.

In a preferred embodiment of the invention, the differential gear is a mechanical gear, known per se, having two drive bevel gears and two differential bevel gears. Each drive bevel gear is non-rotatably connected to one of the housings. The two differential bevel gears are provided rotatably with respect to a horizontal axis connected to the main shaft, for example, so as to penetrate therethrough. At this time, each drive bevel gear is in mesh with the two differential bevel gears.

Also in a preferred embodiment, the drive and / or
Alternatively, the differential bevel gear is formed as a serrated bevel gear and is self-lubricating, i.e., a polyamide having at least one of the intermeshing bevel gears or at least one of the serrated bevel gears self-lubricating, e.g., polyamide, It is preferred to be composed of polymers such as polyacetal and polyester. The selection of the optimal material for the gears of the differential gear and other parts of the device of the present invention can be made within the knowledge of those skilled in the art.

The friction surfaces, ie the surfaces of the housing operatively connected by the differential gear, which come into contact with the corresponding paper strip, are provided with a wear-resistant elastic elastomer, for example raw rubber, polyurethane, It is covered with a rubbery material having a Shore hardness A in the range of 80-100, typically 90-95, such as a synthetic or natural elastic elastomer such as polyisoprene.

Furthermore, it is also possible to obtain the friction effect of the housing surface by its surface properties or surface structure, for example by its surface roughness and / or pattern or statistically distributed pattern. is there. For that purpose, the surface or surface area comprises metal, ceramic, glass or hard material (sintered material, metal carbide, nitride layer, diamond or boron nitride), etc. It is also possible to use a material having abrasion resistance obtained by embedding fine particles in a layer made of a metal or nonmetal binder.

With regard to the selection of the friction surface, too, it is within the knowledge of a person skilled in the art to select the most suitable material, taking into account the aforementioned problems.

In general, at least two opposing contact portions are in close contact with both paper edges of the paper strip in order to guide the paper strip in the longitudinal direction. The contact portions are preferably separated from each other by at least a distance corresponding to the operating width of the device in the direction of operation of the device, i.e. in the direction of travel of the web, in particular in front of the corresponding driven roller. It can be appreciated that the positions of these contact portions or contact portion pairs are variable, and the purpose may be to adapt to different paper widths or to fine tune the introduction of paper. .

The invention further relates to a method for driving this novel device in feeding the paper strip forward cycle by cycle. At this time, an acceleration stage, a movement stage, and a braking stage are assigned to each forward feeding cycle of the paper band. The acceleration phase is triggered by a signal corresponding to the desired paper length, and the forward control of the paper strip takes place at a point determined by the paper length.

For this purpose, the paper strip has, for example, a mark formed by printing, which activates a control signal or the like according to the desired paper length by means of a method known per se, for example by reading it optically. In this case, the operation is controlled by control electronics which, in a manner known per se, compare the current value at the starting point of the forward feed with the set value and control the drive according to the difference.

Hereinafter, the present invention will be described in detail based on preferred embodiments which do not limit the present invention.

The device 1 shown schematically in FIG. 1, the first guide 1 for the paper band B ¹
2 and an optional (shown in perspective) a second guide 14 for a ^second paper band B2. The number of guide lanes is limited only by the structural data and the number of paper strips to be processed. It is also possible to process three or more paper strips in a similar manner (not shown) if space permits, if desired. The number of strips that can be processed simultaneously in the device according to the invention is not critical and depends on the skilled person.

If more than one guide is used, it is also possible to arrange the guides in a known manner, overlapping each other so that they converge. Use two or more rollers (
Therefore, if two or more paper strips are processed simultaneously), it does not matter whether one of the guides extends substantially horizontally, even if each guide is at an angle to the horizontal line. . When using a single paper band, guide 1
2 may be provided horizontally or at an angle to a horizontal line. The magnitude of this angle is also within the discretion of those skilled in the art.

The paper strip B ¹ and possibly other paper strips are conveyed in the apparatus to a source not shown, such as a magazine or a vertical cutting device for a paper strip for duplex printing. Each paper strip is in close contact with one guide 13 or 15 on its side (only the guide in front of each is shown).

Each strip is typically associated with an associated driven roller 182 or 184, for example, an undriven driven or driven roller 192 or 194, or a similar pressing means, typically along the same. Between the pressing means pressed against by a light pressure of 50-500 g, for example as a "guillotine" with a cutting rod or knife and one or two cutting edges known per se, or by rotating It travels to a transverse cutting means 11 which can be formed as a knife or similar. As mentioned briefly above, instead of each roller, a plurality of close rollers and / or means having the same or similar effect, such as a contacting spring, a strap, etc., may be used or exert their effects. It is also possible to employ a supplementary method for doing so.

The rollers 182 or 184 are connected to an associated drive 162 or 164, for example an electric motor, the operation of which is controlled by the control 17 to guide at least one sheet of paper to the transverse cutting means 11. Have been.

The configuration of the driven roller 182 is shown in FIG. 2 as a semi-schematic sectional view. The roller has an integral, continuous, main shaft 20, typically made of a hard material such as steel, aluminum, etc., which is rotatably introduced at both ends 201, 202 into bearings 204, 205. On one side (here, for example, at end 201) is connected to a drive motor, not shown.

On the main shaft 20, two housings 21 and 22 are provided so as to be rotatable around the shaft between two stoppers 206 and 207 connected to the shaft 20. Each housing is typically made of a hard material such as, for example, steel, aluminum or a thermosetting plastic, and is made of a friction layer 219, 229 or a friction material made of, for example, an elastic polyurethane (eg, Vukollan® from Bayer). It has a layer of fine particulate hard material in a suitable matrix material.

Each housing is in close contact with the associated pressing rollers 29a, 29b in the area of its friction layers 219, 229 to sufficiently press the paper strip against the friction layers (not shown in FIG. 2). When the driving unit is driven (not shown in FIG. 2), the paper strip is conveyed substantially without slippage.

As shown in an enlarged manner in FIG. 2 a, the two housings 21, 22 are connected to each other by a differential gear 24 in a central region of the main shaft 20. The differential gear 24 includes two drive bevel gears 211 and 221 which are formed as saw-toothed bevel gears and are connected to the accompanying housings 21 and 22 so as not to rotate. The operative connection of these drive bevel gears 211, 221 or the housings 21, 22 fixedly connected thereto is freely rotatable about an auxiliary shaft 28, which is also formed as two gears, and This is achieved by the differential gears 261 and 262 meshing with the bevel gears 211 and 221.

The auxiliary shaft 28 penetrates through the horizontal bore of the main shaft 20 and follows the rotation thereof, that is, rotates in the radial direction. This auxiliary shaft 28 may be rotatable in its axial direction,
Usually this has no practical meaning. What is important is that the differential gear 24 exerts its effect only when the housings 21 and 22 which are in close contact with the paper band do not contribute to the transport to the same extent. Such imbalances occur, for example, when the paper band is no longer running exactly straight, i.e. perpendicular to the transverse cutting means, as a result of contamination during continuous use, e.g. by paper dust. In this case, the differential gear 24 immediately corrects, so that even if continuous use is performed when the running speed of the paper band is typically 1 to 4 m / sec, this paper band can be reliably formed. Guarantee that you will be guided.

A preferred maneuver or control for driving the spindle 20 is illustrated in FIG. In this case, the electric motor providing the drive is such that the initially stationary paper strip is first accelerated in an acceleration phase B _acc and then moves at a substantially constant speed or guides from a forward feed phase B _mov to a braking phase B _br. Steered to be. In a preferred embodiment for operating the device according to the invention, the control of the drive is performed in step B _mov
From step _Bbr to the step _Bbr , and the braking action is measured such that the sheet of paper is correctly positioned with respect to the transverse cutting means, for example in a position controlled by printed landmarks in a conventional manner. .

In practice, this means that a selectable forward feed cycle for each sequence of paper strips is generated by signals corresponding to the desired paper length and triggered by landmarks on the paper strip, and The control for performing the forward feeding of the sheet band is performed such that the control is performed at the starting point determined by the sheet length. The reading can be triggered in a manner known per se, for example by optically reading the indicia on the paper strip. This operation is controlled by a control electronic device that compares the current value of the starting point position with the set value and controls the drive based on the difference.

FIG. 4 shows a partially broken portion of the guide 42 in the apparatus of the present invention, and a paper band 43 having a center line M and a width B provided thereon. The guides 45a and 45b on the edge surface are provided in front of the driven roller 44 at a distance L with respect to the traveling direction (arrow A). In this case, the distance L is at least equal to the width B of the strip 43. Preferably they have the same size. Pressing roller 49a,
Reference numeral 49b is provided symmetrically with respect to the center line M of the paper band, and presses the paper band in the region of the friction layer against a roller connected to the driving unit 46 via the shaft 40.

The above-described embodiments are intended to illustrate, but not limit, the present invention, and generally to feed at least one sheet of paper forward continuously or cycle by cycle. An apparatus is provided for processing this at least one sheet band by cutting. The device has at least one guide for at least one sheet of paper towards the transverse cutting device. When two or more paper strips are processed, the number of guides naturally increases accordingly. The apparatus also comprises means for controlling the forward feed of the web and at least one of the rollers extending perpendicularly to the operating direction over the operating width of the apparatus, for example one or two undriven driven rollers. At least one driven roller acting with the pressing means. The driven roller has a continuous main shaft, and only one end of the main shaft is connected to a driving unit for rotating the main shaft. The main shaft carries at least one pair of housings, which are cylindrical and rotatable about the main shaft and operatively connected to each other by mechanical or other differential gears.

In the foregoing description, several preferred embodiments of the present invention have been described.
However, it can be understood that these are not intended to be limiting, but merely illustrative details. The particular materials and components of the devices described, as well as the structural or operational parameters, may vary rather within the scope of the expertise based on the teachings of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating the apparatus of the present invention including a first and optional second paper strip.

FIG. 2 is a semi-schematic sectional view showing a driven roller in the apparatus of the present invention.

FIG. 2a is an enlarged view showing a differential gear of the roller in FIG. 2;

FIG. 3 is a drawing showing forward feeding.

FIG. 4 is a schematic top view of a guide having one sheet band and a corresponding driven roller.

[Procedural Amendment] Submission of translation of Article 34 Amendment

[Submission date] April 5, 2001 (2001.4.5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

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[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Contents of correction]

TECHNICAL FIELD The present invention relates to an apparatus for processing a paper strip by feeding and cutting the paper strip forward in each cycle . Such a device is described, for example, in German Utility Model No. 85 04 658 (1985) and in European Patent Application 0 15
No. 6,775,775. Devices of this kind are used, in particular, for automatically processing continuous sheets, i.e. for cutting paper strips, for converging pieces that match one another, and basically for placing them in envelopes.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Contents of correction]

[0007] Instead of a tractor for the forward feeding of a paper strip, it is used for the continuous processing of a continuous strip of paper, plastic or fabric, typically a processing station or cutting the strip. attempts to use a transport means having a conventional roller pair is at least one pair of rollers having a drive unit for driving in opposite direction to the forward feed for each cycle to the station did not lead to a desired result . U.S. Patent No. 4,555,967 relates to a continuous sheet guide apparatus before feeding of the sheet is not interrupted because the transverse cutting. U.S. Pat. No. 3,552,967 discloses a sheet guide device having a differential gear in a continuously winding sheet winding device.

[Procedure amendment 4]

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[Procedure amendment 6]

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Each forward feed cycle of the paper band in which the mobile phase and the braking phase and the acceleration phase is assigned to drive this new device which is in the forward feed per cycle [0021] For feeding zone . The acceleration phase is triggered by a signal corresponding to the desired paper length, and the forward control of the paper strip takes place at a point determined by the paper length.

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH , GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, U S, UZ, VN, YU, ZW [Continuation of summary]

Claims (10)

[Claims] 1. The method according to claim 1, wherein the at least one sheet band is formed as at least one sheet band (B ₁ Device for processing by controlling forward feed and cutting
1) wherein said apparatus is for a paper strip traveling towards a transverse cutting means (11).
At least one guide (12), and said device (1)
Device having means (17, 162) for controlling the forward feed of one sheet band.
Wherein the apparatus for forward feeding the paper strip has an operating direction over an operating width of the apparatus.
With at least one pressing means (192a, 192b).
Having at least one driven roller (182), said driven roller comprising:
A continuous main shaft (20), and only one of the two ends (201)
The main shaft (20) is connected to a drive unit for rotating a following main shaft.
Operatively connected to each other via a differential gear (24) rotatable about a main shaft
Having at least one pair of cylindrical housings (21, 22).
Equipment to do. 2. The differential gear (24) comprises two drive bevel gears (211 and 211).
221) and two differential bevel gears (261, 262), wherein each drive bevel gear is non-rotatably connected to its associated housing (21, 22), The apparatus of claim 1, wherein each differential bevel gear is rotatably provided about a horizontal axis (28) connected to the main shaft, and each drive bevel gear is in mesh with two differential bevel gears. 3. The drive and / or differential bevel gear (211; 221; 3).
261, 262) is formed as a serrated bevel gear. 4. The drive and / or differential bevel gear (211; 221;
The device according to claim 2 or 3, wherein at least one of the surfaces 261 and 262) is formed so as to have self-lubricating properties by, for example, at least the surfaces in mesh with each other being made of a self-lubricating polymer. 5. Each of the housings (21, 22) has a friction surface (219, 22) made of a rubber-elastic material having a Shore hardness A of 80 to 100, for example.
229) Apparatus according to claim 1,2,3 or 4 covered by. 6. The friction surface according to claim 1, wherein the friction surface has a surface made of a material that is actually hard, for example, has a structure made of a fine-grained hard material having tackiness such as roughness. The device according to 2, 3 or 4. 7. Each guide (12) for said paper strip (B ₁ ) has two opposing contact portions (13a, 13b) which are in close contact on both sides of the paper strip, said contact portions being in the running direction. Are spaced at least by the working width of the device.
7. The device according to claim 1, 2, 3, 4, 5, or 6 provided in front of 2). 8. A method for driving a device according to claim 1, 2, 3, 4, 5, 6, or 7, wherein each forward feed of the paper strip (B ₁ ) to the transverse cutting means (11). The cycle comprises an acceleration phase (B _acc ), a movement phase (B _mov ) and a braking phase (B _br ), the acceleration phase being triggered by a signal depending on the desired paper length and determined by the paper length. A method wherein the forward feed of a paper band is controlled at a starting point. 9. The paper strip has a mark as a starting point for activating a signal corresponding to a desired sheet length by reading, and compares a current value at the starting point with a set value to determine a difference between the current value and the set value. 9. The method according to claim 8, wherein the position of the starting point is controlled by a control electronic device that controls the drive based on the control. 10. A method for processing said at least one paper strip by forward feeding at least one paper strip to a cutting means for producing individual paper, said at least one paper strip being provided. Of the at least one pressing means (19) extends perpendicularly to the operating direction over the operating width of the device.
2) is carried out by a driven roller (182) acting in conjunction with said driven roller having a main shaft (20), one of which has two ends (201).
Is connected only to the drive unit for rotating the continuous main shaft, the main shafts (20) being rotatably connected to each other via a differential gear (24) around the main shaft. A method comprising: at least one pair of housings (21, 22) having a cylindrical shape.