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US20050242494A1 - Apparatus for conveying sheets through a printing machine - Google Patents

Apparatus for conveying sheets through a printing machine Download PDF

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Publication number
US20050242494A1
US20050242494A1 US11/083,856 US8385605A US2005242494A1 US 20050242494 A1 US20050242494 A1 US 20050242494A1 US 8385605 A US8385605 A US 8385605A US 2005242494 A1 US2005242494 A1 US 2005242494A1
Authority
US
United States
Prior art keywords
deflection rollers
deflection
belt
conical
respect
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.)
Abandoned
Application number
US11/083,856
Other languages
English (en)
Inventor
Frank Gunschera
Sven Lippardt
Bernhard Waltenberger
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Assigned to HEIDELBERGER DRUCKMASCHINEN AG reassignment HEIDELBERGER DRUCKMASCHINEN AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIPPARDT, SVEN, GUNSCHERA, FRANK, WALTENBERGER, BERNHARD
Publication of US20050242494A1 publication Critical patent/US20050242494A1/en
Abandoned 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
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/09—Function indicators indicating that several of an entity are present
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5124—Stretching; Tentering
    • B65H2301/51242—Stretching transversely; Tentering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5125—Restoring form
    • B65H2301/51256—Removing waviness or curl, smoothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/251—Details of drive roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/252—Details of idler roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to an apparatus for conveying sheets through a printing machine.
  • the apparatus has at least one belt which is laid over deflection rollers, the belt running direction being oblique with respect to the sheet transport direction.
  • the apparatus can be used, in particular, during the conveying of sheets onto a stack in a printing machine.
  • German published patent application DE 39 39 212 A1 describes a sheet guiding and braking device in the delivery of printing presses, in which sheet guide rods are arranged lying next to one another in the conveying direction in the region of printfree corridors.
  • the guide rods have longitudinal grooves which are arranged obliquely and have vacuum applied to them.
  • the device comprises suction rolls with suction rings which have a common drive shaft perpendicular to the conveying direction. Like the longitudinal grooves, the suction rings are arranged obliquely with respect to the conveying direction.
  • the sheets are subjected to a tensile force transversely with respect to the conveying direction by the oblique positioning of the longitudinal grooves and the suction rings, as a result of which the sheets are tautened.
  • an apparatus for conveying sheets in a printing machine comprising:
  • a belt is laid over at least one deflection roller which is of conical configuration.
  • a first driven deflection roller is advantageously of conical and cambered configuration and a second deflection roller lying downstream is of cylindrical and cambered configuration.
  • the rotational axis of the conical deflection roller is exactly perpendicular with respect to the sheet transport direction, while the rotational axis of the second deflection roller assumes an angle which deviates from 90° with respect to the sheet transport direction.
  • the conical deflection rollers can be arranged coaxially on a common drive shaft. Because the rotational axis of the conical deflection rollers and that of the drive shaft do not intersect, the result is simple, standardized bearing designs.
  • cylindrical as used herein encompasses shapes of a barrel type. That is, the rolling surface of the corresponding pulley or deflection roller may be crowned so that an axial section would be bounded by convex surfaces. In a preferred embodiment, then, the center deflection roller would resemble a symmetrical barrel, while the lateral deflection rollers would resemble a bottom portion and a top portion of such a barrel, respectively.
  • the deflection rollers include a first deflection roller having a conical configuration and a second deflection roller having a crown-face configuration.
  • the conical deflection roller has a crown-face running surface.
  • the deflection rollers are rotatably supported about respective axes enclosing an acute angle with respect to one another.
  • At least one belt is formed with vacuum openings and laid over the deflection rollers, for conveying the sheets in the printing press, and a vacuum device is operatively associated with the at least one belt.
  • two or more belts each running over respective deflection rollers, and the belts define running directions diverging symmetrically with respect to the sheet transport direction.
  • the deflection rollers lying upstream as seen in the sheet transport direction are conical and have mutually aligned axles.
  • a common drive is provided that can be coupled to the conical deflection rollers.
  • the suction belts are positioned in pairs obliquely with regard to the sheet center, it being possible for a suction belt which lies on the center of the belt to lie in the sheet transport direction.
  • the suction belts which run obliquely outward are each guided on conical deflection rollers.
  • the conical design of the deflection rollers has the effect that a suction belt tracks on the deflection rollers without additional lateral guides.
  • the sheets are tautened transversely with respect to the sheet paper running direction, with the result that no corrugations are formed on the sheet between the suction belt modules. As a result, the stack formation in the delivery of a sheet-fed printing press is stabilized.
  • FIG. 1 is a schematic elevational view of a braking station according to the invention in the delivery of an offset printing press;
  • FIG. 2 is a schematic perspective view of the braking station according to FIG. 1 ;
  • FIG. 3 is a plan view onto the braking station of FIG. 2 .
  • a printing unit 2 which operates according to the offset method and has an impression cylinder 2 . 1 .
  • the latter guides a respective sheet in a processing direction which is indicated by means of the rotational direction arrow 5 through a roller nip between the impression cylinder 2 . 1 and a blanket cylinder 2 . 2 which interacts with the impression cylinder 2 . 1 , and transfers it subsequently, in the present example, to a row of grippers of a single revolution transfer drum 2 . 3 .
  • a row of grippers disposed on the impression cylinder 2 . 1 for gripping the sheet 3 at a gripper edge at the leading end of the sheet 3 are opened during the transfer.
  • the sheet 3 is transferred accordingly from the single revolution transfer drum 2 . 3 to a further transfer drum 2 . 4 which is of the half revolution type in the present example and transfers the sheet 3 to a chain conveyor 4 of the delivery 1 .
  • the chain conveyor 4 comprises two endless conveying chains 6 , of which each one circulates during operation along a closed chain path in the vicinity of a respective side wall of the chain delivery 1 .
  • Each conveying chain 6 wraps around a respective one of two synchronously driven drive sprockets 7 whose axes are aligned with one another, and, in the present example, is guided over a respective deflection sprocket 8 which is situated downstream of the drive sprockets 7 with regard to the processing direction.
  • Gripper systems 9 which are carried by the two conveying chains 6 extend between the latter and have grippers which pass through gaps between the grippers disposed on the transfer drum 2 .
  • the sheets are braked to a depositing speed which is reduced with regard to the processing speed and are released finally after reaching the depositing speed, with the result that a respective sheet 3 which is then decelerated finally comes into contact with front edge stops 12 and, while being aligned on the front edge stops 12 and rear edge stops 13 lying opposite them, forms a stack 14 together with preceding and following sheets 3 .
  • the stack 14 can be lowered by means of a lifting unit at the same rate as the stack 14 grows.
  • FIG. 1 only a platform 15 which carries the stack 14 and lifting chains 16 which bear the platform 15 and are illustrated with dash dotted lines are shown of the lifting unit.
  • the conveying chains 6 are guided along their paths between the drive sprockets 7 at one end and the deflection sprockets 8 at the other end by way of chain guiding rails which determine the chain paths of the chain runs.
  • the sheets 3 are transported by the lower chain run in FIG. 1 .
  • the section of the chain path which is passed through by the lower chain run is followed by a sheet guiding face 17 which faces that section and is formed on the sheet guiding apparatus 10 .
  • a supporting air cushion is preferably formed during operation between the sheet guiding face 17 and the sheet 3 which is respectively guided over it.
  • the sheet guiding apparatus 10 is equipped with compressed or blowing air nozzles which open into the sheet guiding face 17 and of which only one is shown in FIG. 1 as representative of all of them, and in a symbolic illustration in the form of the connection piece 18 .
  • a dryer 19 and a dusting apparatus 20 are provided on the path of the sheets 3 from the drive sprockets 7 to the braking station 11 .
  • a coolant circuit is integrated into the sheet guiding face 10 .
  • the coolant circuit is indicated symbolically in FIG. 1 by an inlet connection piece 21 and an outlet connection piece 22 on a coolant trough 23 which is assigned to the sheet guiding face 17 .
  • An illustration of the above-mentioned chain guiding rails is omitted in FIG. 1 . The course of the latter in the present example can be seen, however, from that of the chain runs.
  • the braking station 11 is shown in greater detail in FIG. 2 .
  • the braking station 11 comprises five suction belt modules 24 . 1 to 24 . 5 in a parallel arrangement with respect to the conveying direction 25 of the sheets 3 .
  • the suction belt modules 24 can be positioned individually transversely with respect to the conveying direction 25 on print-free regions of the sheet 3 .
  • the suction belt modules 24 are mounted on a guide rod 26 which is fastened in a frame 27 . 1 , 27 . 2 .
  • Stepping motors 28 . 1 to 28 . 5 which are coupled to the suction belt modules 24 . 1 to 24 . 5 are provided as positioning drives.
  • Pinions 29 are in each case arranged fixedly on the motor shafts of the stepping motors 28 so as to rotate with them, which pinions 29 engage in a chain 30 whose ends are fastened in the frame 27 . 1 , 27 . 2 and which is aligned parallel to the guide rod 26 .
  • the suction belt modules 24 comprise suction belts 31 which are guided over deflection rollers.
  • the suction belts 31 are driven synchronously, in that in each case a deflection roller is coupled to a shaft 32 which is mounted rotatably in the frame 27 . 1 , 27 . 2 .
  • the shaft 32 is coupled to a gear mechanism 33 and a motor 34 .
  • suction belts 31 Under the suction belts 31 there are suction ducts which are connected to a vacuum source via lines 35 .
  • the lines 35 are laid in a hose duct 36 such that they can move.
  • the rear edge stops 13 are fastened to the suction belt modules 24 .
  • the entire braking station 11 described in FIG. 2 including the suction belt modules 24 , can be positioned in the conveying direction 25 in the delivery 1 .
  • FIG. 3 shows a plan view of the suction belt modules 24 . 1 to 24 . 5 .
  • Each suction belt module 24 . 1 to 24 . 5 comprises deflection rollers 37 . 1 to 37 . 5 which are driven with the shaft 32 and deflection rollers 38 . 1 to 38 . 5 which are driven with the suction belts 31 . 1 to 31 . 5 .
  • the axes of the deflection rollers 37 . 1 to 37 . 5 lie coaxially with respect to the axis 39 of the shaft 32 .
  • the axis 39 lies perpendicular with respect to the conveying direction of the sheet 3 .
  • the central rollers are cylindrical with a cambered running surface for the suction belt 31 . 3 or, in other words, they are rotationally and longitudinal-sectionally symmetrical barrel bodies, or crown-face pulleys.
  • the axis 40 of the deflection roller 38 . 3 lies parallel to the axis 40 .
  • the suction belt 31 . 3 lies on the sheet center 41 and extends parallel to the conveying direction 25 .
  • the deflection rollers 37 . 1 , 37 . 2 and 37 . 4 , 37 . 5 are of conical configuration with the cone angle ⁇ and with a cambered running surface for the suction belts 31 . 1 , 31 . 2 , and 31 . 4 , 31 . 5 .
  • the radii of the deflection rollers 37 . 1 , 37 . 2 and 37 . 4 , 37 . 5 increase in the direction of the sheet center 41 .
  • the deflection rollers 38 . 1 , 38 . 2 and 38 . 4 , 38 . 5 are of cylindrical configuration with a cambered running surface for the suction belts 31 . 1 , 31 . 2 and 31 . 4 , 31 . 5 .
  • the deflection rollers 38 . 1 , 38 . 2 and 38 . 4 , 38 . 5 are offset outward with respect to the deflection rollers 37 . 1 , 37 . 2 and 37 . 4 , 37 .
  • the suction belts 31 . 1 , 31 . 2 and 31 . 4 , 31 . 5 run obliquely outward symmetrically with respect to the sheet center 41 at an angle ⁇ .
  • the sheet 3 is laterally tautened as it is advanced in the conveying direction 25 by the oblique positioning of the suction belts 31 . 1 , 31 . 2 and 31 . 4 , 31 . 5 , with the result that no corrugations are formed between the suction belt modules 24 . 1 to 24 . 4 .
  • the stack 14 can be formed more quickly and exactly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
US11/083,856 2004-05-03 2005-03-18 Apparatus for conveying sheets through a printing machine Abandoned US20050242494A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10/2004021598.7 2004-05-03
DE102004021598 2004-05-03

Publications (1)

Publication Number Publication Date
US20050242494A1 true US20050242494A1 (en) 2005-11-03

Family

ID=35186256

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/083,856 Abandoned US20050242494A1 (en) 2004-05-03 2005-03-18 Apparatus for conveying sheets through a printing machine

Country Status (3)

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US (1) US20050242494A1 (zh)
JP (1) JP2005320166A (zh)
CN (1) CN1706735A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100078881A1 (en) * 2008-09-26 2010-04-01 Brother Kogyo Kabushiki Kaisha Automatic sheet transporting apparatus, and automatic document scanning apparatus with the automatic sheet transporting apparatus
WO2018167343A1 (es) * 2017-03-17 2018-09-20 Simon Corrugated Machinery, S.L. Dispositivo y procedimiento para el transporte de láminas flexibles
US11982967B2 (en) 2019-08-16 2024-05-14 Fujifilm Business Innovation Corp. Sheet transport device and image forming apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1854045B (zh) * 2005-04-28 2010-04-14 海德堡印刷机械股份公司 印刷机的具有页张制动器的收纸装置以及印刷机
CN102649346B (zh) * 2011-02-28 2017-08-29 海德堡印刷机械股份公司 从下面给经印刷和/或涂有亮油的页张撒粉或扑粉的设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220353A (en) * 1916-02-21 1917-03-27 Lindbladh Corp Delivery device.
US4200016A (en) * 1978-06-13 1980-04-29 Rotographic Machinery Apparatus for forming a horizontal stack of vertically oriented sheets
US5368287A (en) * 1993-11-15 1994-11-29 Pitney Bowes Inc. Ninety degree turn-up apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220353A (en) * 1916-02-21 1917-03-27 Lindbladh Corp Delivery device.
US4200016A (en) * 1978-06-13 1980-04-29 Rotographic Machinery Apparatus for forming a horizontal stack of vertically oriented sheets
US5368287A (en) * 1993-11-15 1994-11-29 Pitney Bowes Inc. Ninety degree turn-up apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100078881A1 (en) * 2008-09-26 2010-04-01 Brother Kogyo Kabushiki Kaisha Automatic sheet transporting apparatus, and automatic document scanning apparatus with the automatic sheet transporting apparatus
US8540238B2 (en) * 2008-09-26 2013-09-24 Brother Kogyo Kabushiki Kaisha Automatic sheet transporting apparatus, and automatic document scanning apparatus with the automatic sheet transporting apparatus
WO2018167343A1 (es) * 2017-03-17 2018-09-20 Simon Corrugated Machinery, S.L. Dispositivo y procedimiento para el transporte de láminas flexibles
US11982967B2 (en) 2019-08-16 2024-05-14 Fujifilm Business Innovation Corp. Sheet transport device and image forming apparatus

Also Published As

Publication number Publication date
JP2005320166A (ja) 2005-11-17
CN1706735A (zh) 2005-12-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HEIDELBERGER DRUCKMASCHINEN AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GUNSCHERA, FRANK;LIPPARDT, SVEN;WALTENBERGER, BERNHARD;REEL/FRAME:016401/0735;SIGNING DATES FROM 20050308 TO 20050309

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION