EP0062168B1 - Dispositif de sortie de feuilles comportant des pinces portées par des chaînes sans fin dans des machines d'impression rotatives - Google Patents

Dispositif de sortie de feuilles comportant des pinces portées par des chaînes sans fin dans des machines d'impression rotatives Download PDF

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Publication number
EP0062168B1
EP0062168B1 EP82101776A EP82101776A EP0062168B1 EP 0062168 B1 EP0062168 B1 EP 0062168B1 EP 82101776 A EP82101776 A EP 82101776A EP 82101776 A EP82101776 A EP 82101776A EP 0062168 B1 EP0062168 B1 EP 0062168B1
Authority
EP
European Patent Office
Prior art keywords
sheet
guide
blowers
braking rollers
guide plate
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
Application number
EP82101776A
Other languages
German (de)
English (en)
Other versions
EP0062168A1 (fr
Inventor
Gerhard Pollich
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
Priority to AT82101776T priority Critical patent/ATE10478T1/de
Publication of EP0062168A1 publication Critical patent/EP0062168A1/fr
Application granted granted Critical
Publication of EP0062168B1 publication Critical patent/EP0062168B1/fr
Expired 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
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/245—Air blast devices
    • 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
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/69—Other means designated for special purpose
    • B65H2404/691—Guiding means extensible in material transport direction
    • 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 a sheet delivery for rotary printing presses with gripper bridges rotating on endless chains and the delivery stack directly upstream, acting on the underside of the sheet brake rollers, in front of which, seen in the direction of sheet travel, blow nozzles are arranged, one on the underside of the sheets guided by the gripper bridges Direction of sheet travel in opposite air flow of adjustable speed.
  • a sheet delivery of the type outlined above is known. Extending across the sheet delivery below the chain track, directly in front of the brake rollers, is a blowpipe, which is equipped with several blow nozzles, from which an air flow that runs in the opposite direction to the sheet travel direction and is directed at a very acute angle against the underside of the incoming sheet.
  • the air flow emerging from the blowing nozzles reduces the static pressure on the underside of the sheet and creates an air cushion between the sheet guide table and the sheets transported by the chain grippers.
  • the reduction in the static pressure on the underside of the sheet ensures that the underside of the sheet rests securely on the brake rollers.
  • the underside of the elbow slides over the blow nozzle tube. In the case of double-sided printing of the sheet using the perfecting method, smearing of the fresh print on the underside is inevitably the result.
  • brake nozzle strips are arranged in front of the delivery stack which extend over the sheet width and are directed counter to the sheet movement and approximately parallel to the sheet path.
  • the brake nozzle strips are arranged on the starting side of the bend.
  • the brake nozzle strips are provided with a baffle that is curved in the shape of a horn under the bend runway and which has guide bends that are bent downwards in width. The air emerging from the brake nozzle strips acts on the underside of the incoming sheet and pulls it down onto the brake nozzle strips.
  • DE-AS 2544566 shows a further known embodiment of a sheet boom.
  • the path of the boom chain has a part running obliquely upwards and a part extending horizontally over the stack of booms.
  • a sheet guide plate is arranged, which is designed in two parts for the purpose of an uninterrupted air cushion reaching to the brake rollers in such a way that the front edge of the part of the sheet guide plate closest to the delivery stack is fixed is connected to the brake rollers.
  • the adjustable part of the sheet guide plate is also adjusted.
  • this known sheet delivery ensures an air cushion extending up to the brake rollers above the sheet guiding surface, although streaking of the fluttering sheet cannot be completely ruled out.
  • the rear area of the transported sheets also rests with certainty on the brake rollers, at least at higher sheet conveying speeds - for example 8,000 sheets per hour - it is necessary to install blowers above the rising and also the horizontally running part of the delivery chain, which convey the transported sheets surely press on the brake rollers. It can happen that the sheet is pressed onto the sheet guide and smeared.
  • blowers have to blow very hard to push down the rear end of the bow.
  • the air conveyed by these fans then also enters the space between the next incoming sheet and the sheet guide plate.
  • the air cushion created by the sheet conveying speed is thereby significantly increased, which in turn leads to the sheet being pushed up at certain sheet conveying speeds or at least to the fluttering of the sheet end.
  • Such an unevenly guided bow again requires an increase in the blower output in order to push down the bow end with certainty.
  • this causes more air to pass under the next incoming sheet.
  • the performance of the blowers blowing on the top of the sheet and the delivery rate of the chain boom must be significantly reduced.
  • the object of the invention is to avoid the disadvantages of the known sheet delivery. Above all, it should be ensured at all sheet conveying speeds that the rear end of the sheet guided by gripper bridges of a chain boom is pulled with certainty on the brake rollers and that an adjustment of the entire sheet braking and guiding is direction to print-free areas of a sheet printed on both sides is possible.
  • adjustable guide bands can be tensioned between the brake rollers and the guide bracket blowers with the brake rollers.
  • a flexible guide plate can also be provided at the same point.
  • cover plates are arranged easily replaceable between two adjacent brake rollers. If the brake rollers are adjusted laterally, they can be exchanged for cover plates of other dimensions.
  • chain deflection wheels 4 are provided and at the end of the sheet delivery there are further chain deflection wheels 5.
  • the endless chains 1 are driven and guided by these chain deflection wheels 4 and 5.
  • the path covered by the chains 1 consists of an ascending section 6, starting with the chain deflection wheels 4 and a horizontal section 7 running above the delivery stack 8, into which the ascending section 6 merges with a slight curvature.
  • the horizontal section 7 of the chain track ends at the chain deflection wheels 5.
  • a sheet guide plate 9 Under the rising section 6 of the chain track, a sheet guide plate 9 is provided, the lower end of which is guided around the chain deflection wheels 4 and begins shortly before the pressure cylinder 34.
  • the upper end of the guide plate 10 has a slight curvature which corresponds approximately to the curvature of the chain track in the transition point between the rising section 6 and the horizontal section 7.
  • the guide brackets 11 of these guide bracket blowers 12 extend approximately equidistantly above the guide plate end 10, counter to the direction of movement of the gripper bridges 2.
  • the guide bracket 11 are practically on the surface of the guide plate 9.
  • each guide bracket 11 there is a blowing nozzle 13, as can be seen in particular from FIG. 2.
  • the guide bracket blowers 12 are guided downward in the space between the guide plate end 10 and the brake rollers 14 and connected to a distributor pipe 16 via hoses 15.
  • This distributor pipe 16 is in turn connected via a hose 17 to a compressor (not shown).
  • the gripper bridges 2 take over the sheet 18 from the pressure cylinder 34 and guide it over the guide plate 9. An air cushion is inevitably formed between the surface of the guide plate 9 and the underside of the sheet 18 transported. The sheet 18 consequently does not come into contact with the guide plate 9, but rather is transported freely by the gripper bridges 2.
  • the air emerging from the blowing nozzles 13 not only causes the underside of the sheet to be securely placed on the brake rollers 14, but also reinforces the air cushion between the sheet 18 and the guide plate 9 in the region of the rising section 6 of the chain track. There is therefore no sagging of the the sheet guided by the gripper bridges 2 between two guide bar blowers in the region of the transition point from the rising section 6 into the horizontal section 7. Smearing of the printed underside of the sheet due to contact with the surface of the guide plate end 10 is hereby avoided.
  • the gripper bridges release the front edge of the sheet that is being guided and transported. Due to the secure abutment of the rear end of the sheet against the brake rollers 14, there is a strong braking, so that the leading edge of the sheet hits the stacking stops 19 only at a low speed. Damage to the leading edge of the sheet can thereby be effectively avoided even at a high sheet conveying speed.
  • the guide bracket blowers 12 are laterally adjustably fastened to a crossbeam 20 which extends transversely over the sheet boom.
  • the housing 21 of the brake rollers 14 is also laterally adjustable on a cross member 22. This cross member 22 is held by the two side frames 3 of the sheet delivery and can be adjusted in the direction of the delivery stack 8.
  • Each housing 21 of the brake rollers 14 has a hose connection 23 and is connected via a hose 24 to a vacuum pump, not shown.
  • a guide band 25 is attached to each hose connection 23 of a housing 21. This runs from this hose connection 23 in the direction of the guide bracket blowers 12. It is guided over guide bolts 26 which are attached to the guide bracket blowers 12.
  • the end of the guide belt 25 is attached to a weight 27, by means of which it is kept constantly taut. When the brake rollers 14 are adjusted in or against the sheet conveying direction, the weight 27 moves up and down.
  • the bow guide belt 25, which is kept taut by the weight 27 in this way, serves to support the sheet against the guide bracket 11, because at the end of the guide plate end 10 the air cushion on the underside of the sheet collapses and in the area between the guide bracket blowers 12 and the brake rollers 14 no further Support elements are provided.
  • both the brake rollers 14 and the guide bracket blowers 12 are set to the same pressure-free point, the associated guide band 25 inevitably only hits a pressure-free point on the underside of the sheet.
  • FIG. 4 in which a top view of a sheet delivery according to FIG. 3 is shown.
  • Guide bar blowers 12 and brake rollers 14 lie exactly one behind the other in the sheet conveying direction.
  • both guide bracket blowers 12 and the brake rollers 14 must be adjusted laterally together to the non-printing areas of the new print image.
  • a guide cloth 28 can also be provided, provided that it is treated antistatically or coated with a metal foil.
  • the front end of this guide cloth 28 is also articulated on the housing 21 of the brake rollers 14. It extends up to a deflecting rod 29, which is provided shortly behind the guide plate end 10, and is held taut by a weight 27.
  • a weight 27 is attached to the free end 30 of the guide cloth 28.
  • the guide cloth 28 constantly covers the variable space between the guide bracket blowers 12 and the brake rollers 14 with regard to its expansion.
  • the air cushion formed above the guide plate 9 on the underside of the sheet 18 remains preserved by the guide cloth 28. Smearing of the underside of the sheet can thus also be effectively prevented by means of the guide cloth 28.
  • Fig. 6 shows an embodiment of the invention, in which the guide bracket blowers 12 are directly welded to the housing 21 of the brake rollers 14. Instead of a guide cloth 28, a flexible guide plate 31 is provided here. Its front end is connected to the housing 21 of the brake rollers 14. In this case, the guide brackets 11 of the guide bracket blowers 12 extend over the front end of this flexible guide plate 31. Below the sheet guide plate 9, two cross members 32 and 33 are provided, which serve to guide the guide plate 31. The arrangement of the crossmember 32 is such that there is practically no gap between the surface of the guide plate 31 and the lower edge of the guide plate end 10.
  • the guide plate 31 is pulled out from under the curved guide plate end 10 and thus continues the sheet-guiding surface of the sheet guide plate 9 continuously.
  • the interconnected brake rollers 14 and guide bracket blowers 12 can be adjusted in a simple manner laterally and in the sheet conveying direction. Since the guide bracket blowers 12 are immediately upstream of the brake rollers 14, the arc is applied with great force against the latter.
  • cover plates 35 are provided between the individual brake rollers 14, as in Fig. 7 u. 8. These cover plates 35 can be easily exchangeably fastened on the crossbeam 22 for the brake rollers 14 by means of a clamping device 36. In the case of lateral adjustment of the brake rollers 14, the existing cover plate 35 can be exchanged for another suitable one.
  • the end of the cover plates 35 facing the guide bar blowers 12 protrudes into a curved guide cross-member 37 which, together with the cross-member 22, is adjustably arranged on the side frames 3 in the direction of the delivery stack 8.
  • a fastening 38 connects a flexible guide plate 31 to the mentioned guide cross-member 37.
  • the film-like guide plate 31 is guided vertically downwards by a deflecting rod 29, which is directly upstream of the guide bracket blowers 12, and is held taut by weights, not shown.
  • FIGS. 7 and 8 makes it possible to maintain the air cushion above the guide plate 9 during sheet transport up to the level of the brake rollers 14, since the cover plates 35 continue the continuous air cushion-maintaining guide surface between the brake rollers 14.
  • a smooth sheet travel is achieved by the continuously continuing sheet guiding surface.

Claims (7)

1. Receveur de feuilles pour machines d'impression rotatives, comportant des barres de pinces (2) tournant sur des transporteurs à chaînes sans fin ainsi que des cylindres de freinage (14) placés directement en amont de l'empilage de réception (8), agissant sur la face inférieure de la feuille (18) et devant lesquels, en considérant le sens de déplacement des feuilles, sont disposées des buses de soufflage (13) qui dirigent sur la face inférieure des feuilles guidées par les barres de pinces (2) un courant d'air de vitesse réglable et orienté en sens inverse du sens de déplacement des feuilles, caractérisé en ce que :
- un brin (6) du transporteur à chaîne suit un parcours ascendant jusqu'à ce qu'il rejoigne un brin (7) s'étendant horizontalement au-dessus de l'empilage (8),
- il est prévu une tôle déflectrice de feuille (9) en dessous du brin ascendant (6),
- il est prévu entre l'extrémité supérieure (10) de la tôle déflectrice et les cylindres de freinage (14) des souffleurs à étriers directeurs (12), dont les étriers directeurs (11) sont disposés sensiblement à des distances égales dans le sens opposé au sens de déplacement des feuilles, au-dessus de la partie supérieure de la tôle déflectrice de feuilles (9),
- et dont les extrémités sont agencées comme des buses de soufflage (13), et en ce que
- les souffleurs à étriers directeurs (12) sont montés sur une traverse (20) en étant déplaçables transversalement au sens de déplacement des feuilles.
2. Receveur de feuilles selon la revendication 1, caractérisé en ce qu'entre les cylindres de freinage (14) et les souffleurs à étriers directeurs (12) est tendue une bande de guidage (25) correspondante, déplaçable avec les cylindres de freinage.
3. Receveur de feuilles selon la revendication 1, caractérisé en ce qu'il est prévu entre les cylindres de freinage (14) et les souffleurs à étriers directeurs (12) une toile de guidage (28) s'étendant au moins sur la largeur maximale de feuille, déplaçable avec les cylindres de freinage (14) et qui est revêtue d'une matière antistatique.
4. Receveur de feuilles selon la revendication 1, caractérisé en ce qu'il est prévu entre les cylindres de freinage (14) et les souffleurs à étriers directeurs (12) une tôle de guidage flexible (31) s'étendant au moins sur la largeur maximale de feuille et dépiaçable avec les cylindres de freinage (14).
5. Receveur de feuilles selon la revendication 1, caractérisé en ce qu'il est prévu, dans l'espace situé entre deux cylindres de freinage adjacents (14), une tôle de recouvrement (35) facilement démontable qui est remplacée par une tôle de recouvrement (35) d'autres dimensions lors d'un décalage latéral des cylindres de freinage (14).
6. Receveur de feuilles selon la revendication 1, caractérisé en ce que les souffleurs à étriers directeurs (12) sont fixés sur le carter (21) des cylindres de freinage (14).
EP82101776A 1981-04-04 1982-03-06 Dispositif de sortie de feuilles comportant des pinces portées par des chaînes sans fin dans des machines d'impression rotatives Expired EP0062168B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82101776T ATE10478T1 (de) 1981-04-04 1982-03-06 Bogenausleger fuer rotationsdruckmaschinen mit an endlosen ketten umlaufenden greiferbruecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3113750 1981-04-04
DE19813113750 DE3113750A1 (de) 1981-04-04 1981-04-04 "bogenausleger fuer rotationsdruckmaschinen mit an endlosen ketten umlaufenden greiferbruecken"

Publications (2)

Publication Number Publication Date
EP0062168A1 EP0062168A1 (fr) 1982-10-13
EP0062168B1 true EP0062168B1 (fr) 1984-11-28

Family

ID=6129420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101776A Expired EP0062168B1 (fr) 1981-04-04 1982-03-06 Dispositif de sortie de feuilles comportant des pinces portées par des chaînes sans fin dans des machines d'impression rotatives

Country Status (10)

Country Link
US (1) US4479645A (fr)
EP (1) EP0062168B1 (fr)
JP (1) JPS57176166A (fr)
AT (1) ATE10478T1 (fr)
CA (1) CA1183179A (fr)
DE (2) DE3113750A1 (fr)
DK (1) DK149386C (fr)
ES (1) ES8302592A1 (fr)
MX (1) MX155336A (fr)
ZA (1) ZA821764B (fr)

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DE2308025C3 (de) * 1973-02-19 1980-12-04 Western Gear Corp., Pittsburgh, Pa. (V.St.A.) Bogenausleger für eine Bogendruckmaschine
DE2358206C3 (de) * 1973-11-22 1979-10-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Vorrichtung an Druckmaschinen zum Transport von Bogen
DE2436998A1 (de) * 1974-08-01 1976-02-12 Maschf Augsburg Nuernberg Ag Kettenfoerdervorrichtung an bogenrotations-offsetdruckmaschinen
DE2544566C3 (de) * 1975-10-04 1984-11-15 Miller Printing Equipment Corp., Pittsburgh, Pa. Bogenausleger für Bogendruckmaschinen
DE2552998C2 (de) * 1975-11-26 1983-11-10 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenausleger für Rotationsdruckmaschinen
DD137079A1 (de) * 1978-01-25 1979-08-15 Hans Zimmermann Bogenleiteinrichtung in bogenauslegern von druckmaschinen
DE8003052U1 (de) * 1980-02-06 1980-05-08 M.A.N.-Roland Druckmaschinen Ag, 6050 Offenbach Bogenauslegevorrichtung
GB8402360D0 (en) * 1984-01-30 1984-02-29 Picker Int Ltd Nmr shims

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631598A1 (de) * 1996-08-05 1998-02-12 Roland Man Druckmasch Pneumatische Bogenführungsvorrichtung in einer Druckmaschine
DE19631598C2 (de) * 1996-08-05 2000-02-17 Roland Man Druckmasch Pneumatische Bogenführungsvorrichtung in einer Druckmaschine
DE102005016783B4 (de) * 2004-05-04 2019-02-14 Heidelberger Druckmaschinen Ag Bogenbremse

Also Published As

Publication number Publication date
DE3261326D1 (en) 1985-01-10
MX155336A (es) 1988-02-19
US4479645A (en) 1984-10-30
ZA821764B (en) 1983-01-26
JPS57176166A (en) 1982-10-29
ATE10478T1 (de) 1984-12-15
DK137182A (da) 1982-10-05
DK149386C (da) 1986-10-27
DK149386B (da) 1986-05-26
ES511015A0 (es) 1983-02-01
EP0062168A1 (fr) 1982-10-13
DE3113750A1 (de) 1982-10-14
CA1183179A (fr) 1985-02-26
JPH0356914B2 (fr) 1991-08-29
ES8302592A1 (es) 1983-02-01

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