EP0324900B1 - Verfahren und Vorrichtung zum Verändern des Überlappungsgrades von in einem Schuppenstrom geförderten Druckereiprodukten - Google Patents

Verfahren und Vorrichtung zum Verändern des Überlappungsgrades von in einem Schuppenstrom geförderten Druckereiprodukten Download PDF

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Publication number
EP0324900B1
EP0324900B1 EP88117431A EP88117431A EP0324900B1 EP 0324900 B1 EP0324900 B1 EP 0324900B1 EP 88117431 A EP88117431 A EP 88117431A EP 88117431 A EP88117431 A EP 88117431A EP 0324900 B1 EP0324900 B1 EP 0324900B1
Authority
EP
European Patent Office
Prior art keywords
products
conveyor
conveying speed
spacing
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88117431A
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German (de)
English (en)
French (fr)
Other versions
EP0324900A1 (de
Inventor
Norbert Bürge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferag AG
Original Assignee
Ferag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferag AG filed Critical Ferag AG
Priority to AT88117431T priority Critical patent/ATE55965T1/de
Publication of EP0324900A1 publication Critical patent/EP0324900A1/de
Application granted granted Critical
Publication of EP0324900B1 publication Critical patent/EP0324900B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6654—Advancing articles in overlapping streams changing the overlapping figure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance

Definitions

  • the present invention relates to a method and a device for changing the degree of overlap of printed products such as newspapers, magazines and the like which are conveyed in a stream of shingles, according to the preambles of claims 1 and 8, respectively.
  • the known device has two conveyors arranged one behind the other, the conveying speed of the second conveyor being changeable relative to the conveying speed of the first conveyor in order to set the thickness of the scale formation fed to the roll to a predetermined value.
  • the conveying speed of the first conveyor is measured with a tachometer generator and fed to a control device with which the desired conveying speed of the second conveyor is tracked. After adjusting the thickness of the scale formation fed to the roll, the control device ensures that the ratio between the conveying speeds of the two conveyors connected in series remains constant.
  • a device for forming wraps from sacks formed in scale formation is known.
  • the bags are fed to the winding by means of two conveyors connected in series.
  • a pulse generator is arranged on the drive shaft of the second conveyor, which emits pulses corresponding to the angle of rotation of the drive shaft and feeds them to a counter.
  • the counter sums up the number of pulses and is reset to zero each time a scanning device in the area of the first conveyor detects another sack fed in scale form. If the counter is not reset before it reaches a predetermined limit value, the drive motor of the second conveyor is switched off and only started again as soon as the scanning device detects a sack fed by means of the first conveyor.
  • This device prevents the distance between successive sacks in the scale formation fed to the roll from exceeding a certain value. As long as the distance between successive sacks is smaller than this specific value, the two conveyors continue to run at a constant conveying speed and the sacks are fed to the reel at an unchanged distance.
  • the object of the present invention is to provide a simple method and a less complex device for changing the degree of overlap of printed products such as newspapers, magazines and the like which are conveyed in a stream of shingles, in which or without knowledge of the conveying speed and the distance between successive feeds Printed products the degree of overlap can be changed to a desired level.
  • the conveying speed of the second conveyor regulated in such a way that the distance between successive products, i.e. the degree of overlap in the scale formation formed corresponds to the predetermined target value. It is not necessary to measure the conveying speed of the first conveyor, nor is it important to know the distance between successive products in the shingled stream.
  • a time-dependent variable that characterizes the product sequence is determined. Based on this ascertained size and the predetermined target value of the distance between successive products in the scale formation to be formed, a target conveying speed is determined with which the products are conveyed further. By changing the conveying speed, the distance is thus adjusted and it is ensured that the distance between successive products is constant in the scale formation formed.
  • the repetition frequency of the resulting products is determined from the scanning.
  • the target conveyor speed for the second conveyor can be determined by multiplying this repetition frequency by the predetermined target value of the distance between successive products. This enables the regulation of this conveying speed in a very simple manner.
  • a smooth run can be achieved in that the repetition frequency is formed by averaging the sampling of several products.
  • a sampling can be used to determine a time interval between products.
  • the target conveying speed is obtained by dividing the predetermined target value of the distance between successive products by the determined time interval.
  • the device has a first conveyor 10 and a second conveyor 12 connected downstream thereof.
  • the two conveyors 10, 12 are designed as belt conveyors and are each driven in the direction of arrow A by means of a motor 14 or 16 designated by M.
  • the endless belts 18 of the two conveyors 10, 12 are guided around deflecting rollers 20 and 22, only the deflecting roller 22 of the first conveyor 10 being shown at the end of the conveyor-effective route of this conveyor 10.
  • the conveying direction of the two conveyors 10, 12 is designated by F, and the conveying speed of the first conveyor 10 is indicated by vl and that of the second conveyor 12 by v2.
  • the two conveyors 10, 12 transport printed products 24 such as newspapers, magazines or the like occurring in a shingled stream S to a further processing 25 indicated by dash-dotted lines.
  • the printed products 24 are arranged in the shingled stream S to overlap one another in the manner of roof tiles.
  • the distance between successive printed products 24 of the resulting shingled stream S is denoted by A1, while the distance between the successive printed products 24 in the region of the second conveyor 12 is indicated by A2.
  • a scanning device 26 is arranged in the area of the first conveyor 10. This is followed by a control device 28, which has a measuring unit 30, an evaluation circuit 32 and a motor controller 34.
  • a tacho generator 36 designated T, is operatively connected to the motor 16 of the second conveyor 12.
  • the electrical connections between the scanning device 26, the control device 28 with the measuring unit 30, the evaluation circuit 32 and the motor controller 34, the tachometer generator 36 and the motor 16 are indicated schematically by a line 38.
  • the arrow labeled SA2 and pointing to the evaluation circuit 32 symbolizes a source for the input of the desired predetermined distance A2 between successive printed products 24 in the scale formation S to be formed.
  • FIG. 2 shows part of the control device 28 in greater detail.
  • the signals generated by the scanning device 26 when printing products 24 are recognized and fed to the measuring unit 30 are shown schematically as rectangular pulses and are designated by 40. Each square-wave pulse corresponds to the leading edge 24 'of a printed product 24.
  • the measuring unit 30 has a frequency measuring device which forms a digital signal proportional to the repetition frequency of the square-wave pulses of the signal 40 and feeds it to the evaluation circuit 32.
  • a digital-to-analog converter 42 is provided, which converts the digital signal into an analog signal, which is fed to a multiplier 44.
  • a source 46 supplies the signal SA2, which is proportional to the predetermined scale spacing A2 and is likewise fed to the multiplier 44.
  • the source 46 has a schematically illustrated voltage divider circuit 48 for generating the signal SA2.
  • the multiplier 44 multiplies the signal generated by the digital-to-analog converter 42 by the signal SA2 and outputs the result to the motor controller 34 as a signal proportional to the target conveying speed of the second conveyor 12 (see also FIG. 1).
  • the measuring unit 30 can additionally have a counter (not shown) in order to count the square-wave pulses of the signal 40 and thus the number of printed products 24 supplied.
  • the device shown in FIGS. 1 and 2 operates as follows:
  • the resulting shingled stream S is fed in the conveying direction F at the speed v1 predetermined by the motor 14.
  • the conveying speed v1 usually depends on the working speed of the processing station upstream of the first conveyor 10, for example a rotary printing press.
  • the frequency measurement The device of the measuring unit 30 determines the repetition frequency of the square-wave pulses of the signal 40, which represents a measure of the printed products 24 supplied per unit of time.
  • the signal proportional to this repetition frequency is multiplied by the signal SA2 proportional to the predetermined distance A2, and the product is passed on to the motor controller 34 as a signal proportional to the target conveying speed of the second conveyor 12.
  • the motor controller 34 compares this signal with the signal of the tachometer generator 36, which is proportional to the conveying speed v2, and controls the motor 16 depending on the comparison result.
  • the conveying speed v2 of the second conveyor 12 is thus determined directly from the repetition frequency of the printed products 24 obtained by multiplication by the predetermined distance A2.
  • both conveyors 10, 12 are driven at the same conveying speeds v1, v2, so that the distance between successive printed products 24 in the area between the two conveyors 10 , 12 does not change. If, on the other hand, as shown in FIG. 1, the distance A1 of the resulting shingled stream S is smaller than the predetermined distance A2, the second conveyor 12 is driven at a conveyor speed v2 that is higher than the conveyor speed v1 of the first conveyor 10. The printed products 24 located on the second conveyor 12 are thus of larger size speed for further processing 25 conveyed as printed products 24 are fed from the first conveyor 10.
  • a scale formation S is thus formed which, regardless of the conveying speed v1 of the first conveyor 10 and the distance A1 in the resulting scale formation S, has a constant distance A2 between successive printed products 24.
  • an average repetition frequency of the resulting printed products 24 in the scale stream S can also be determined, in which several square-wave pulses of the signal 40 of the scanning device 26 are evaluated together. For example, an average repetition frequency for ten printing products 24 can be determined. This leads to a smoother running of the second conveyor 12, since it is subjected to smaller and, above all, less frequent changes in the conveying speed v2.
  • the measuring unit 30 can also have a time measuring unit which measures the time interval between two or more successive pulses of the signal 40 generated by the scanning device 26.
  • the evaluation circuit 32 is designed such that it can divide the signal SA2, which is proportional to the predetermined distance A2, by this determined time interval. The result of this division is proportional to the target conveyor speed v2 of the second conveyor 12 and is fed to the motor controller 34, which ensures that the motor 16 drives the conveyor 12 at the conveyor speed v2 corresponding to this target conveyor speed.
  • control device 28 can be designed differently than is shown in FIGS. 1 and 2. So it can be carried out in pure digital technology, analog technology or in mixed analog and digital technology, similar to that shown in FIGS. 1 and 2. However, it is also possible for the control device 28 and also the motor controller 34 to be designed on the basis of programmable logic controllers or microprocessors.
  • the only connection between the first conveyor 10 or the resulting shingled stream S and the control device 28 or the second conveyor 12 is that the scanning device 26 recognizes the leading or trailing edges 24 'of the printed products 24 and generates signals 40 on the basis of these scans and passes on to the control device 28.
  • the method described above or the device created permits the formation of scale formations S in which the predetermined distance A2 between successive printed products 24 is always maintained, even if the distance A1 or the conveying speed v1 of the resulting scale flow F should be subject to strong fluctuations.
  • An automatic start-up of the second conveyor 12 is thus readily possible as soon as the scanning device 26 detects the first printed product 24 of a new supplied scale formation S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Control Of Conveyors (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
EP88117431A 1988-01-13 1988-10-19 Verfahren und Vorrichtung zum Verändern des Überlappungsgrades von in einem Schuppenstrom geförderten Druckereiprodukten Expired - Lifetime EP0324900B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88117431T ATE55965T1 (de) 1988-01-13 1988-10-19 Verfahren und vorrichtung zum veraendern des ueberlappungsgrades von in einem schuppenstrom gefoerderten druckereiprodukten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10288 1988-01-13
CH102/88 1988-01-13

Publications (2)

Publication Number Publication Date
EP0324900A1 EP0324900A1 (de) 1989-07-26
EP0324900B1 true EP0324900B1 (de) 1990-08-29

Family

ID=4179307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117431A Expired - Lifetime EP0324900B1 (de) 1988-01-13 1988-10-19 Verfahren und Vorrichtung zum Verändern des Überlappungsgrades von in einem Schuppenstrom geförderten Druckereiprodukten

Country Status (8)

Country Link
US (1) US5022644A (ja)
EP (1) EP0324900B1 (ja)
JP (1) JP2994393B2 (ja)
AT (1) ATE55965T1 (ja)
CA (1) CA1334861C (ja)
DE (1) DE3860529D1 (ja)
FI (1) FI90855C (ja)
RU (1) RU2036127C1 (ja)

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CH689773A5 (de) * 1995-02-16 1999-10-29 Ferag Ag Vorrichtung zum Vergleichmaessigen des Abstandes zwischen aufeinanderfolgenden flaechigen Produkten.
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Also Published As

Publication number Publication date
US5022644A (en) 1991-06-11
FI890161A (fi) 1989-07-14
FI90855C (fi) 1994-04-11
JP2994393B2 (ja) 1999-12-27
EP0324900A1 (de) 1989-07-26
JPH01181670A (ja) 1989-07-19
DE3860529D1 (de) 1990-10-04
FI90855B (fi) 1993-12-31
RU2036127C1 (ru) 1995-05-27
FI890161A0 (fi) 1989-01-12
CA1334861C (en) 1995-03-21
ATE55965T1 (de) 1990-09-15

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