EP0714770A1 - Dispositif pour transporter du papier - Google Patents

Dispositif pour transporter du papier Download PDF

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Publication number
EP0714770A1
EP0714770A1 EP95117206A EP95117206A EP0714770A1 EP 0714770 A1 EP0714770 A1 EP 0714770A1 EP 95117206 A EP95117206 A EP 95117206A EP 95117206 A EP95117206 A EP 95117206A EP 0714770 A1 EP0714770 A1 EP 0714770A1
Authority
EP
European Patent Office
Prior art keywords
areas
conveyor belt
belt
drum
transport device
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.)
Granted
Application number
EP95117206A
Other languages
German (de)
English (en)
Other versions
EP0714770B1 (fr
Inventor
Martin Greive
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
Publication of EP0714770A1 publication Critical patent/EP0714770A1/fr
Application granted granted Critical
Publication of EP0714770B1 publication Critical patent/EP0714770B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines

Definitions

  • the invention relates to a paper transport device for printing presses, having a drive roller, a deflection drum arranged at a distance therefrom and a conveyor belt which runs around the drive roller and the deflection drum and which has areas with engagement elements as well as substantially smooth areas.
  • conveyor belts for the transport of paper sheets between the different stations of a printing press which consist of simple, wide endless belts that run around drive rollers and deflection drums. Since such flat belts are subject to a certain amount of slippage, they are not synchronized with the machine operation. If the exact time of transfer to the next station is important, the conveyor belts must therefore be synchronized.
  • the applicant of the present invention has provided simple machine belts with engagements for toothing on the drive side, resulting in transport devices of the type mentioned above.
  • the invention is therefore based on the object of providing a paper transport device for printing presses in which the paper transport is carried out extremely synchronously with the machine drive.
  • the invention is based on the finding that synchronism errors result not only from slippage of the machine belt, but also from tolerances which arise, for example, during manufacture or through wear of the engagement elements and which, since inevitable, make absolute synchronization of these belts impossible. Due to the partial decoupling of the different conveyor belt areas in the invention, the engagement areas and the smooth-surface areas cooperate advantageously, so that transported paper can be fed with great accuracy on the currently running smooth-surface areas.
  • the mobility between the areas with engaging elements and the substantially smooth areas of the conveyor belt can be generated by any elastic means in between, for example a material with a lower modulus of elasticity or a thinner material than in the other areas of the conveyor belt.
  • the desired elasticity can be generated in a particularly simple manner by the conveyor belt between the areas with engagement elements and the substantially smooth areas with a plurality of recesses, which are arranged distributed in the longitudinal direction of the conveyor belt.
  • the elasticity properties are also very precisely reproducible and can be kept very constant along the conveyor belt.
  • the cutouts are formed by slits running transversely to the longitudinal direction of the conveyor belt, the narrow webs remaining between these cutouts allow a relative movement between the belt sections with a minimal loss of usable transport area.
  • the axially separated drum sections are formed in that the drive roller and the deflection drum each have two side toothed disks, which are fastened on a shaft, and a freely rotatably mounted drum between the toothed disks, the toothed disks and the associated drum essentially have the same diameter.
  • the respective drum can adapt to the belt tension, and the belt can center and in run on a stable path.
  • the freely rotatably mounted drum of the deflection drum has a concave outer surface.
  • the outer surface of the drive roller concave, or convex outer surfaces may be used.
  • the conveyor belt is preferably composed of conventional components, namely a flat machine belt and two toothed belts attached to the side, the machine belt forming the substantially smooth areas of the conveyor belt and the toothed belts forming the areas of the conveyor belt with engagement elements.
  • the machine belt and the toothed belt must be put together so that the tension cords of the toothed belt are at the same level as the neutral fiber of the machine belt.
  • a drive roller 1 which is shown again enlarged in FIG. 2, contains a drive shaft 2 mounted and driven on the machine side.
  • two toothed pulleys 3 each with an external toothing suitable for toothed belts, are fastened at an axial distance .
  • a cylindrical drum 4 with almost exactly the same diameter as the toothed disks 3.
  • the drum 4 is rotatably mounted on the drive shaft 2 by means of two separate bearings 5 so that it can be rotated against the toothed disks 3.
  • a deflection drum 6 in FIG. 1, which is shown again enlarged in FIG. 3, contains a deflection shaft 7, which is arranged at a distance parallel to the drive shaft 2.
  • a deflection shaft 7 On the deflection shaft 7, two toothed disks 8 with a larger diameter than the toothed disks 3 are rotatably mounted at the same axial distance as the toothed disks 3 of the drive shaft 2.
  • Extending between the two toothed disks 8 is a drum 9 which has at its axial ends almost exactly the same diameter as the toothed disks 8 and has a somewhat smaller diameter towards its center, so that a lateral surface 10 of the drum 9 has a slightly concave cross section.
  • the drum 9 is rotatably supported by means of two separate bearings 11 on two hollow pins 12 cast onto the toothed disks 8, which project inwards from the toothed disks 8 without touching the deflection shaft 7.
  • an endless conveyor belt 13 which is as wide as the drive roller 1 and the deflection drum 6 and which forms two longer straight sections between them.
  • One of the two straight sections of the conveyor belt 13 points upward in the printing press, so that sheets of paper (not shown) can be transported to a certain extent on the conveyor belt 13 by rotating the drive shaft 2.
  • the conveyor belt 13 is divided in the direction of its width into a central area formed by a smooth machine belt 14 and two edge areas each formed by a toothed belt 15.
  • the machine belt 14 lies on the drive roller 1 and the deflection drum 6 on their separately rotatable drums 4 and 9, while the toothed belts 15 rest on the drive roller 1 and the deflection drum 6 on the toothed pulleys 3 and 8 thereof.
  • the machine belt 14 Adjacent to the two toothed belts 15, the machine belt 14 is each provided with a large number of cutouts 16 which are distributed along its length at regular intervals.
  • the recesses 16 have the shape of slots which run transversely to the longitudinal direction of the conveyor belt 13 or the machine belt 14, but are significantly shorter than the machine belt 14 is wide, so that the width of the machine belt 14 available for paper transport is not significantly restricted.
  • the deflection shaft 7 of the deflection drum 6 is held at its ends in a U-shaped bracket 17 which engages around the deflection drum 6.
  • the bracket 17 is mounted at its base in a pivot point 18 so that it can be pivoted about the pivot point 18 in the plane of FIG. 1 or 3.
  • the fulcrum 18 lies in a plane that runs perpendicularly through an imaginary center line of the conveyor belt 13 in its longitudinal direction.
  • the fulcrum 18 is also stationary with respect to the machine, as indicated in FIGS. 1 and 3, so that the conveyor belt 13 is held taut.
  • Fig. 4 shows the manner in which the machine belt 14 is connected to the toothed belt 15.
  • the machine belt 14 has a reduced thickness at its edge 19, and the toothed belt 15 has an extension 20 which is placed over the edge 19 and is fastened thereto, for example by gluing.
  • the reduction in thickness at the edge 19 of the machine belt 14 and the position of the extension 20 of the toothed belt 15 are selected so that tensile strands 21 running in the longitudinal direction in the toothed belt 15 are as accurate as possible at the level of the neutral fiber of the machine belt 14.
  • the conveyor belt 13 can also be made in one piece.
  • the transport device described above has the effect that the conveyor belt 13 runs practically absolutely synchronously with the drive roller 1 on the straight path between the drive roller 1 and the deflection drum 6, so that paper can be transported with an accuracy of a few microns.
  • a slippage of the machine belt 14 to the drive roller 1 has no effect on the currently running belt section.
  • Relative movements between the toothed belt 15 and the machine belt 14, which inevitably arise due to tolerances, are compensated for by the rotatably mounted drums 4, 9 and by the relatively elastic connection of the toothed belt 15 to the machine belt 14.
  • the conveyor belt 13 can center and run in a stable path. The same effect occurs if the fulcrum 18 is not, as shown in FIG. 1, outside the deflection drum 6 and the drive roller 1, but in between.
EP95117206A 1994-12-02 1995-11-02 Dispositif pour transporter du papier Expired - Lifetime EP0714770B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442982 1994-12-02
DE4442982A DE4442982C2 (de) 1994-12-02 1994-12-02 Papiertransportvorrichtung

Publications (2)

Publication Number Publication Date
EP0714770A1 true EP0714770A1 (fr) 1996-06-05
EP0714770B1 EP0714770B1 (fr) 1998-06-17

Family

ID=6534771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117206A Expired - Lifetime EP0714770B1 (fr) 1994-12-02 1995-11-02 Dispositif pour transporter du papier

Country Status (5)

Country Link
US (1) US5765679A (fr)
EP (1) EP0714770B1 (fr)
JP (1) JPH08225177A (fr)
DE (2) DE4442982C2 (fr)
ES (1) ES2119288T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982261A3 (fr) * 1998-08-18 2002-02-13 Masao Kubota Système de transport continu à haute vitesse
DE19854327C2 (de) * 1998-11-25 2000-11-16 Klaus Edelmann Gurtförderer für eine Gurtkurve
US6279752B1 (en) * 2000-04-14 2001-08-28 Polychem Corporation Wide rectangular clarifiers
JP5282333B2 (ja) * 2008-01-07 2013-09-04 株式会社Ｉｓｏｗａ 被搬送物の搬送装置
DE102014002360A1 (de) * 2014-02-18 2015-08-20 Beumer Gmbh & Co. Kg Transportvorrichtung mit einem endlosen bandförmigen Transportelement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186633A (fr) * 1957-11-21 1959-08-28 Perfectionnements aux machines pour l'impression sur table en continu
GB1561965A (en) * 1976-10-25 1980-03-05 Post Office Apparatus for conveying flat items

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1843208A (en) * 1929-09-03 1932-02-02 Fmc Corp Belt conveyer
US2129337A (en) * 1937-10-22 1938-09-06 Spears Joseph Mackay Conveyer
US3917092A (en) * 1971-08-16 1975-11-04 Goodrich Co B F Conveyor belt with sprocket drive
SE7709553L (sv) * 1976-09-28 1978-03-29 Ammeraal Nederland Bv Bandtransportor
CH614908A5 (fr) * 1977-11-22 1979-12-28 Buehrer Transver Ag
US4289230A (en) * 1978-01-19 1981-09-15 Mcgee Terence Troughed belt conveyors
US4421228A (en) * 1981-08-17 1983-12-20 Eastman Kodak Company Periodically aligning an endless web
DE3900341A1 (de) * 1989-01-07 1990-07-12 Fredenhagen Kg Verfahren und vorrichtung zum transport von guetern
FR2677339B1 (fr) * 1991-06-10 1995-08-25 Fcb Perfectionnements aux transporteurs a bandes sans fin.
JPH0624598A (ja) * 1992-02-25 1994-02-01 Nec Niigata Ltd 電子写真方式画像形成装置の搬送ローラ
TW219419B (en) * 1992-05-21 1994-01-21 Ibm Mobile data terminal with external antenna
JPH05338843A (ja) * 1992-06-05 1993-12-21 Canon Inc 定着装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186633A (fr) * 1957-11-21 1959-08-28 Perfectionnements aux machines pour l'impression sur table en continu
GB1561965A (en) * 1976-10-25 1980-03-05 Post Office Apparatus for conveying flat items

Also Published As

Publication number Publication date
ES2119288T3 (es) 1998-10-01
JPH08225177A (ja) 1996-09-03
EP0714770B1 (fr) 1998-06-17
DE59502588D1 (de) 1998-07-23
US5765679A (en) 1998-06-16
DE4442982A1 (de) 1996-06-05
DE4442982C2 (de) 1997-12-04

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