EP0341970A2 - Apparat zum Glätten von Bahnen - Google Patents

Apparat zum Glätten von Bahnen Download PDF

Info

Publication number
EP0341970A2
EP0341970A2 EP89304666A EP89304666A EP0341970A2 EP 0341970 A2 EP0341970 A2 EP 0341970A2 EP 89304666 A EP89304666 A EP 89304666A EP 89304666 A EP89304666 A EP 89304666A EP 0341970 A2 EP0341970 A2 EP 0341970A2
Authority
EP
European Patent Office
Prior art keywords
sheet
wrap angle
diameter
straightening
curls
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.)
Withdrawn
Application number
EP89304666A
Other languages
English (en)
French (fr)
Other versions
EP0341970A3 (de
Inventor
Akira Sakurabayashi
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.)
Kobayashi Engineering Works Ltd
Original Assignee
Kobayashi Engineering Works Ltd
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 Kobayashi Engineering Works Ltd filed Critical Kobayashi Engineering Works Ltd
Publication of EP0341970A2 publication Critical patent/EP0341970A2/de
Publication of EP0341970A3 publication Critical patent/EP0341970A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Definitions

  • the present invention relates to an apparatus for straightening curls in a sheet made of a plastic film, paper, a metallic foil or the like which is wound off from a winding roll.
  • the sheet wound off from a winding roll is cut into given lengths by a cutting machine.
  • a cutting machine if the sheet wound off from the winding roll is cut in that state, curls come into the open in the cut sheets due to a wound form.
  • Such curls create problems such as jamming which may occur in a line for cutting and treating the sheets and in the sheet inlet portion of a printing machine or of various other machines when the sheets are thereafter introduced therein.
  • the degree to which curls are straightened by the above-described apparatus for straightening sheet curls depends upon the wrap angle of the sheet, and the greater the wrap angle is, the stronger the pressure with which the sheet is wiped with the decurler bar and the greater the degree to which curls are straightened.
  • such a wrap angle adjusting device is so configured that the decurler bar is displaced from a position corresponding to a large parent roll (the position where a low degree of pushing force is applied inwardly) to a position corresponding to a small parent roll (the position where a high degree of pushing force is applied inwardly) in the state wherein the backup rolls are set at standard positions with the sheet pushed in.
  • an optimum degree of driving of the decurler bar for the purpose of straightening curls in correspondence with the change in diameter of the winding roll is expressed in a digital pattern using figures in order to automatically adjust the degree of straightening of the curls in the sheet in correspondence with the change in diameter of the winding roll.
  • the figures are separately formed for respective kinds of sheet and the respective component items of the relevant straightening apparatus, each of the figures being formed by collecting in advance data with respect to the optimum degree of driving of the decurler bar from experiments which are performed in such a manner that the diameter of the winding roll is changed within a given range.
  • Such data is previously determined for each kind of sheet and the component items of the straightening apparatus and are stored in the data storage memory so that data conforming to the relevant operation of straightening may be transmitted to the controller of the wrap angle adjusting device from the data storage memory and then used.
  • the volume of data is large, it is necessary to ensure that both the data storage memory and the controller have a space with a large memory capacity, and the further transmission of data from the data storage memory to the controller takes a great deal of time.
  • said constant q of the logical equation is 0.25 to 0.75.
  • An apparatus for straightening curls is capable of straightening and reducing curls which are produced in a sheet on a winding roll. Consideration of such curls is given below.
  • the neutral line length L m (H + t) ⁇ /2 ...(1)
  • L o (H + 2t) ⁇ /2 ...(2)
  • L i H ⁇ /2 ...(3)
  • a suitable product after being subjected to straightening is preferably provided with a uniformly downward weak curl (angle curl).
  • curve a1 represents an allowable upper limit for downward curls (strong curls)
  • curve b1 represents an allowable lower limit for downward curls (weak curls)
  • the range between curves a1 and b1 representing an appropriate region.
  • the locus of relative movement of the decurler bar is set on a perpendicular bisector of the straight line connecting the two backup rolls. If the controller is operated using equation (11), the value S can be easily calculated using the value ⁇ which is calculated from equation (10), resulting in an improved facility of calculation.
  • the present invention achieved on the basis of the items (A), to (D) exhibits the following effects:
  • the constants to be prepared for each type of sheet and each component item of the straightening apparatus are the three constants A, B and q (if q is fixed within the range of 0.25 to 0.75, preferably 0.5, the two constants A, B), only a small number of data needs to be collected or stored.
  • a sheet cutting and treating apparatus 10 comprises a sheet feeder 11, a sheet splicing apparatus 12, a curl straightening apparatus 13, a feed roll 14, a cutting machine 15, and a controller 16.
  • the sheet feeder 11 has a turning arm 18 which is supported by a frame 17 and which has both ends respectively supporting parent rolls 19 (a first parent roll 19A and a second parent roll 19B) to supply a sheet 20 from each of the parent rolls 19.
  • a turning arm 18 which is supported by a frame 17 and which has both ends respectively supporting parent rolls 19 (a first parent roll 19A and a second parent roll 19B) to supply a sheet 20 from each of the parent rolls 19.
  • the sheet splicing apparatus 12 comprises a pressure roller 21 and a knife 22, 1 the pressure roller 21 functioning to press the portion at the rear end of the sheet supplied from the first parent roll 19A against the adhesive double coated tape which was applied to the portion at the front end of the sheet supplied from the second parent roll 19B, and 2 the knife 22 functioning to cut off the sheet supplied from the first parent roll 19A at the rear end thereof which is adjacent to the splicing portion.
  • the curl straightening apparatus 13 serves to straighten curls produced in the sheet 20 in correspondence with the change in the diameter D of each of the parent rolls 19, as described below.
  • the feed roll 14 functions to provide the sheet 20 with a tension required for winding out the sheet 20 from each of the parent rolls 19.
  • the cutting machine 15 functions to cut the sheet 20 which is straightened while being continuously carried in the curl straightening apparatus 13 into an appropriate length.
  • the controller 16 functions to control each of the sheet feeder 11, the sheet splicing apparatus 12, the curl straightening apparatus 13, the feed roll 14 and the cutting machine 15.
  • the controller 16 is able to count the rotational speed N1 of the first parent roll 19A using a parent roll rotation detector 16A provided on the turning arm 18 in order to observe any change of the diameter D of the first parent roll 19A, as well as counting the rotational speed N2 of an intermediate roll 16B (having a known diameter E) using a rotation detector 16C provided for the intermediate roll 16B.
  • the controller 16 causes the turning arm 18 of the sheet feeder 11 to be turned so as to place the first parent roll 19A at the position shown in Fig. 1 at which the work of splicing is effected, and then drives the sheet splicing apparatus 12 which thus performs the splicing of the sheets respectively supplied from the first parent roll 19A and the second parent roll 19B in the manner described above.
  • the curl straightening apparatus 13 comprises a decurler bar 31, two main backup rolls 32 which are provided on both sides of the decurler bar 31, two secondary backup rolls 33 which are provided on both outer sides of each of the main backup rolls 32, a wrap angle adjusting device 34 for driving the decurler bar 31, and an apparatus 35 for changing suddenly the wrap angle which serves to drive the main backup rolls 32.
  • the curl straightening apparatus 13 serves to straighten curls produced in the sheet 20 by applying the decurler bar 31 to the sheet 20 wound out from each of the parent rolls 19 between the two main backup rolls 32 so as to provide a wrap angle ⁇ for the sheet 20.
  • the wrap angle adjusting device 34 drives the decurler bar 31 using, for example, a screw-type feeder 38 which is operated a driving portion 37 controlled by the controller 16.
  • the decurler bar 31 is longitudinally displaced along the perpendicular bisector of the line connecting the right and left main backup rolls 32.
  • the wrap angle adjusting device 34 controlled by the controller 16 causes 1 the decurler bar 31 to be displaced from the position (position shown by the two-dot chain lines in Fig. 2) corresponding to a large parent roll in correspondence with the change in diameter of each of the parent rolls 19 to the position (position shown by the solid lines in Fig. 2) corresponding to a small parent roll in the state wherein the main backup rolls 32 are set at the standard positions (positions shown by the solid lines in Fig. 2) at which the sheet is pushed inwardly.
  • the wrap angle ⁇ of the sheet 20 is adjusted between a small angle ⁇ 1 corresponding to the large parent roll and a large angle ⁇ 2 corresponding to the small parent roll (refer to Fig. 3).
  • the controller 16 performs the successive determination of the wrap angle ⁇ (or the amount of displacement S of the decurler bar 31) which is optimum for straightening of curls using the logical equation described below in correspondence with the change in diameter of each of the parent rolls 19.
  • the controller 16 also controls the driving portion 37 in such a manner that an optimum wrap angle ⁇ (or an optimum diaplacement S of the decurler bar 31) calculated as described above is achieved in correspondence with the change of the diameter D.
  • the data on the constants A, B and q are determined in advance for each kind of the sheet 20 and each component item of the straightening apparatus and stored in the data storage memory 100.
  • the data for the constants A, B, q which are appropriate to the relevant operation of straightening are then supplied from the data storage memory 100 to the controller 16.
  • the value of q is preferably 0.25 to 0.75, more particularly 0.5.
  • the wrap angle adjusting device 34 which is controlled by the controller 16 operates to 2 return the decurler bar 31 to the position corresponding to the large parent roll from the small parent roll when the controller 16 controls the sheet splicing apparatus 12 in such a manner that the sheet from the first parent roll 19A is connected to the sheet from the second parent roll 19B, as described above.
  • the apparatus 35 for suddenly changing the wrap angle drives the main backup rolls 32 using, for example, a cylinder 40 which is operated by the driving portion 39 controlled by the controller 16.
  • the apparatus 35 for suddenly changing the wrap angle controlled by the controller 16 causes the main backup rolls 32 to retract from the standard positions at which the sheet is pushed inwardly to the position at which the sheet is not pushed inwardly (or moderately pushing inwardly) so as to suddenly change the wrap angle ⁇ of the sheet 20 substantially at the same timing as the controller 16 controls the wrap angle adjusting device 34 to start the return of the decurler bar 31 from the position corresponding to the small parent roll to the position corresponding to the large parent roll.
  • the secondary backup rolls 33 are stationarily provided on both outer sides of the decurler bar 31 and the main backup rolls 32, as described above, and service to guide the sheet 20 in such a manner that the wrap angle ⁇ of the sheet 20 is a value ( ⁇ 1) suitable for the diameter of the first parent roll 19B having a large diameter, when the apparatus 35 for suddenly changing the wrap angle causes the main backup rolls 32 to retract from the positions at which the sheet is pushed inwardly.
  • the curl straightening apparatus 13 operates in the following manner:
  • the wrap angle adjusting device 34 functions to displace the decurler bar 31 from the position corresponding to the large parent roll to the position corresponding to the small parent roll in correspondence with the change in diameter of the parent roll in the state wherein the main backup rolls 32 are set at the standard positions at which the sheet is pushed inwardly, so that, the wrap angle ⁇ of the sheet 20 is set to an appropriate value for the diameter D of the parent roll used, resulting in appropriate straightening of curls (see Fig. 4(A)).
  • the wrap angle adjusting device 34 starts the return of the decurler bar 31 from the position corresponding to the small parent roll to the position corresponding to the large parent roll.
  • the apparatus 35 for suddenly changing the wrap angle causes the main backup rolls 32 to retract from the standard positions at which the sheet is pushed inwardly to the position at which the sheet is not pushed in (or moderately pushed in) so as to suddenly change the wrap angle ⁇ of the sheet 20 substantially at the same time as the above-described process 1 of starting the return.
  • the sheet 20 is guided by the secondary backup rolls 33, and the wrap angle ⁇ of the sheet 20 is set to a value appropriate to the diameter of the second parent roll having a large diameter in a moment.
  • the curls in the sheet 20 wound off from the second parent roll 19B having a large diameter are appropriately straightened (refer to Fig. 4(B)).
  • the apparatus 35 for suddenly changing the wrap angle simply functions to selectively switch the two positions of the main backup rolls 32, i.e., the standard positions at which the sheet is pushed inwardly and the positions at which the main backup rolls are retracted, the operation of switching can be easily completed in a moment.
  • the decurler bar 31 is completely returned to the position corresponding to the large parent roll by the wrap angle adjusting device 34 (refer to Fig. 4(C)).
  • the main backup rolls 32 are reset to the standard positions at which the sheet is pushed inwardly from the positions at which the main backup rolls are retracted by the apparatus 35 for suddenly changing the wrap angle (refer to Fig. 4(D)).
  • the wrap angle adjusting device 34 functions to displace the decurler bar 31 from the position corresponding to the large parent roll to the position corresponding to the small parent roll in correspondence with the reduction in diameter D of the second parent roll 19B in the same manner as that described in (A).
  • the wrap angle of the sheet is therefore set to a value optimum for the parent roll used, resulting in appropriate straightening of curls (refer to Figs. 4(E) and 4(F)).
  • the above-described embodiment therefore enables the wrap angle of the sheet 20 to be changed in a moment in accordance with the changes in the diameter of the parent roll used in the state wherein the line speed of the sheet cutting and treating apparatus 10 is kept at a high value which is determined by, for example, the capacity of the cutting machine 15, when the first and second parent rolls are changed over as above described in (B).
  • the curls in the sheet 20 can be appropriately and precisely straightened, while the productivity of the line being maintained.
  • (A) and (F) each represent the case where the diameter of the parent roll 19 used is minimum, the decurler bar 31 is placed at the position corresponding to the small parent roll, and the wrap angle ⁇ of the sheet 20 is the maximum value ⁇ 2.
  • (C) represents the case where the diameter of the parent roll 19 used is maximum, the decurler bar 31 is placed at the position corresponding to the large parent roll, and the wrap angle ⁇ of the sheet 20 is the minimum value ⁇ 1.
  • the above-described embodiment also has the following functions:.
  • the constants prepared for each type of sheet and each component item of the straightening apparatus are the three constants A, B, q (if the q value is fixed to 0.25 to 0.75, preferably 0.5, the two constants A, B), only a small number of data to be collected or stored is sufficient.
  • the wrap angle adjusting device may adjust the wrap angle by controlling the displacement of the main backup rolls in accordance with the changes in the diameter of each winding roll in place of the control of the displacement of the decurler bar.
  • the apparatus for suddenly changing the wrap angle switches in a moment the decurler bar between the standard position at which the sheet is pushed inwardly and the position at which the decurler bar is retracted.
  • the wrap angle adjusting device may function to displace one of the main backup rolls and the decurler bar along a straight line relative to the other, as well as displacing it along a curve line by an operation of turning.
  • the preferred embodiments of the present invention can realize the automatization of straightening of curls with a simple arrangement and in a rapid and highly precise manner.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP19890304666 1988-05-10 1989-05-09 Apparat zum Glätten von Bahnen Withdrawn EP0341970A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP111655/88 1988-05-10
JP63111655A JPH0688710B2 (ja) 1988-05-10 1988-05-10 シートカール矯正装置

Publications (2)

Publication Number Publication Date
EP0341970A2 true EP0341970A2 (de) 1989-11-15
EP0341970A3 EP0341970A3 (de) 1991-02-06

Family

ID=14566830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890304666 Withdrawn EP0341970A3 (de) 1988-05-10 1989-05-09 Apparat zum Glätten von Bahnen

Country Status (2)

Country Link
EP (1) EP0341970A3 (de)
JP (1) JPH0688710B2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022248A1 (de) 2009-05-20 2010-12-09 E.C.H. Will Gmbh Entwölbungsvorrichtung zur Entwölbung einer Materialbahn, insbesondere in einer Anlage der papierverarbeitenden Industrie
CN105731155A (zh) * 2016-04-15 2016-07-06 雅高机械（太仓）有限公司 纸张反卷曲装置及切纸机
EP3196155A4 (de) * 2014-08-12 2018-03-28 Star Micronics Co., Ltd. Papiertransportmechanismus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1511261C3 (de) * 1966-03-24 1974-11-07 Jagenberg-Werke Ag, 4000 Duesseldorf Vorrichtung zum Planrichten laufender WerkstofTbahnen aus Papier, Karton odg.dgl
JPS5215462A (en) * 1975-07-28 1977-02-05 Kobe Steel Ltd Method of controlling metal strip being coiled
CH623285A5 (en) * 1978-06-21 1981-05-29 Bobst Fils Sa J Method for acting on the fibres of a material in the form of a moving web and device for implementing the method
US4322802A (en) * 1980-04-10 1982-03-30 Lewis Jr Clarence A Control apparatus for adjusting the position of a workpiece
AT368044B (de) * 1981-03-26 1982-08-25 Voest Alpine Ag Verfahren und vorrichtung zum aufwickeln gerichte-ter blechbaender
JPS6048427A (ja) * 1983-08-24 1985-03-16 Hitachi Ltd 空気調和機

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022248A1 (de) 2009-05-20 2010-12-09 E.C.H. Will Gmbh Entwölbungsvorrichtung zur Entwölbung einer Materialbahn, insbesondere in einer Anlage der papierverarbeitenden Industrie
DE102009022248B4 (de) 2009-05-20 2019-04-25 Bw Papersystems Hamburg Gmbh Entwölbungsvorrichtung zur Entwölbung einer Materialbahn, insbesondere in einer Anlage der papierverarbeitenden Industrie
EP3196155A4 (de) * 2014-08-12 2018-03-28 Star Micronics Co., Ltd. Papiertransportmechanismus
US10457515B2 (en) 2014-08-12 2019-10-29 Star Micronics Co., Ltd. Paper conveyance mechanism
CN105731155A (zh) * 2016-04-15 2016-07-06 雅高机械（太仓）有限公司 纸张反卷曲装置及切纸机

Also Published As

Publication number Publication date
JPH01285556A (ja) 1989-11-16
EP0341970A3 (de) 1991-02-06
JPH0688710B2 (ja) 1994-11-09

Similar Documents

Publication Publication Date Title
US4952281A (en) Sheet curls reformer
US5141484A (en) Sheet curls reformer
US4191341A (en) Winding apparatus and method
US6086694A (en) High speed web machine
EP0524158B1 (de) Verfahren zum Herstellen von Bahnmaterialrollen und Vorrichtung zur Anwendung dieser Methode
EP0580523B1 (de) Vorrichtung und Verfahren zum Rändeln der Kanten einer Bahn und damit hergestelltes Produkt
CA1228843A (en) Method and apparatus for supplying sheet to winding unit
EP0635445B1 (de) Vorrichtung zum Wickeln
US4229865A (en) Machine for laser scribing and winding metallized film capacitor blanks
EP0326528B1 (de) Vorrichtung zur Überwachung der Herstellung von Papierrollen
KR0135611B1 (ko) 가압 물질 스트립으로부터 롤을 형성하는 방법
EP0341970A2 (de) Apparat zum Glätten von Bahnen
US3794256A (en) Process of transferring a traveling web from a pull roll to an empty core
EP0211313B1 (de) Verfahren und Vorrichtung zum Aufwickeln einer Materialbahn
CA2022536A1 (en) Method and machine for helically depositing a band of film on the vertical faces of a palletized load
US6189825B1 (en) Method for controlling the winding density of film rolls
EP0122134B1 (de) Folienwickelmaschine
US4597516A (en) Web feeder apparatus
CA2205795A1 (en) Roll-forming apparatus for continuous or interleaved webs
JPH0147374B2 (de)
JPH0215464B2 (de)
JP2796926B2 (ja) コイル形状測定方法およびその装置
GB2289267A (en) Unwinding coiled metal strip
JPS60110923A (ja) 異種の無機質フアイバ製品の連続製造設備
JPS60262766A (ja) スリツタの巻取駆動装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890518

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19921221

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940422