DD287227A5 - DEVICE FOR REMOVING ARCES AND / OR BOWS - Google Patents

Abstract

The invention relates to a device for removing sheets and / or Bogenstuecken under Bogenfuehrungszylindern of sheet-fed rotary printing machines, which can be operated either Schoen- or Schoen- and reverse and with which the sheets and / or Bogenstuecken towards tangent point from the upstream printing cylinder and Bogenfuehrungszylinder are promoted can, wherein under the Bogenfuehrungszylinder a sheet path adaptable baffle and the circumference of Bogenfuehrungszylindern a drum cap are provided. The object of the invention to provide a device for removing sheets and / or Bogenstuecken, with which the Bogenstuecken not lost during the promotion to the sampling point is achieved by the drum cap consists of pivotally mounted cap segments and in the direction of gripper with a pneumatically acted upon equipped with the Saugoeffnung after auszen, surrounded by an elastic strip suction box. Fig. 2 {sheet-fed rotary printing machine; Full and reverse printing; Bogenfuehrungseinrichtung; Arc; Bogenstueck; suction box; baffle; pivotable guide, remove; swiveling cape segment}

Description

Field of application of the invention

The invention relates to a device for removing sheets and / or elbows under sheet guiding cylinders of Bogon rotary printing presses, which can be operated either in fair or perfecting.

Characteristic of the prior art

Improper operation or when setting up the printing machine can lead to slipping of sheets, in particular in perfecting, which then deposit on the machine frame or on the sheet guiding device. Furthermore, disruptions and interruptions may occur during machine operation due to too short sheets within a stack or through damaged sheets or pieces of paper.

These sheets or pieces of paper, which can be entrained by normally conveyed sheet during machine operation, lead to damage of other machine parts, in particular when passing through the contact zone between the impression cylinder and blanket cylinder.

GIn removing these sheets or paper sacks (st is difficult because of the tight space and / or only with the help of hooks or pliers.) The cap of the sheet guiding cylinder may need to be disassembled from the document DD-PS 263600 is a device for removing According to this document, hooks which serve to remove sheets or elbows are provided on the sheet guiding cylinder designed as a turning drum, in such a way that the hooks in the operating state of the machine are below the circumference of the turning drum during slow reverse operation of the machine In this case, located under the turning drum and to be removed sheets or elbows of the hooks, several of which are arranged side by side across the width of the turning drum, detected, taken and in the direction of tangent point of impression cylinder and turntable promoted mmel.

In addition, below the turning drum and in the direction of the upstream printing cylinder a pivotable guide, consisting of a spring plate vorgesehen.Das spring plate is pivoted to remove sheets or elbows against the turning drum, so that between the spring plate and turning drum, a gap is formed and so that to be removed Well held against the hooks.

A disadvantage of this device is that the sheet can only be promoted to shortly before the tangent point to the upstream printing cylinder, since the hook shaft must be pivoted there to avoid contact with the lateral surface of the printing cylinder. As a result, sheets or elbows can not be conveyed safely enough that they can always be removed manually.

ZIoI the invention

It is an object of the invention to provide a device for the removal of sheet and / or Bogenstückon, which is simple in construction and with the paper safely away v / sden can.

Explanation of the essence of the invention It is an object of the invention to provide a device for removing sheets and / or elbows, with which the Arched pieces are not lost during the extraction to the extraction point. According to the invention, this object is achieved in that the drum cap of pivotally mounted Kappensegmonten

and equipped in the direction of gripper with a pneumatically actuated with the mammal opening facing outward, umschlottsenen by an elastic strip, suction box.

The device according to the invention is simple in construction and handling. It ensures the safe promotion of Arc and / or arc pieces in the don area in front of the tangent point of the first impression cylinder and sheet guiding cylinder

and beyond. In particular, elbows can be removed from the machine. This is guaranteed by

the generation of a negative pressure in the suction chambers, so that the material to be removed is sucked in and can be transported. By closing the gap between Bogenführungszyiinder and the baffles, it is also possible to promote bow and / or elbows safely to the sampling point. Furthermore, irregularities and production-related deviations within the guide are compensated by a division of the drum cap in several cap segments.

Ausführungshelsplol The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing show:

1: side view of the device in operating position (at pressure) FIG. 2: device in working position (detail)

 3: plan view of the device (schematically)

Fig. 1 shows a side view of the device according to the invention in the operating position of the printing press, d. H. during the

Pressure.

Shown are a first and a second pressure cylinder 1,2, both of which formed as a turning drum Include sheet guide cylinder 3. In the embodiment, a Bogenführungszyiinder 3 between the printing cylinders 1,

2 angeorndet. However, the device can also be used when several Bogenführungszyiinder 3 between the

Pressure cylinders 1,2 are provided. The bow turning system consists in an exemplary embodiment of a suction system 4 and a gripper system 5 by means of those

in perfecting the bow is turned on the principle of sheet trailing edge application. The way of working of a

Sheet guiding cylinder 3 by suction system 4 and gripper system 5 are known and are therefore not closer

be explained.

The device according to the invention consists of the rocking motion in the Bogenführungszyiinder 3 mounted Cap segments 6, wherein the cap segments β are arranged across the width of the machine assembled. In Operating position (see Fig. 1), the cap segments (6) form a uniform lateral surface. At the pivot point 6.1. of Kapeteilgmentes 6 opposite cap page 6.2 is a e'astischerStielfen 13 arranged. Within dos elastic Strip 13 suction chambers 11 are provided. Furthermore, at the cap segment 6 a swinging spring rod 18 with Compression spring 10, Anschalg 19 and driver 20 is arranged. The Anschalg 19 is a Bogenführungszyiinder third

schwingbewenllch mounted pawl 21 with Zugfedo '22 assigned.

In Figure 3, the shift shaft 8 is shown. On the shift shaft 8 is the shift eccentric 24, the driver 20

is assigned, and the pawl 25 which is associated with the pawl 21. Furthermore, on the shift shaft 8 a

Saugiuftsteuerkurve 26 attached. In Bogenführungszyiinder 3, a control valve 27 and a plunger 27.1. provided and over

elastic hose lines 12 connected to the suction chambers 11. The switching shaft 8 is about gear members 28 z. B.

Chain transmission 28 is connected to a locking shaft 23 with adjusting knob 29. Furthermore, located on the control shaft 23 a Switch plate 30, the working position of the cap segment 6 according to Flg. 2 a limit switch 31 is actuated on the Machine frame is attached. The operation of the device according to the invention is the following: Are bow and / or elbows to remove on the guide 14,16, then the machine is at a standstill Switching shaft 23 is actuated with the adjusting knob 29 and the machine lock switched so that the machine only in Hopbetriob

to be turned backwards kajin ^^

At the same time the limit switch 31 switches the not shown, according to patent DD-PS 263500 known transmission for pivoting

the guide 15 is pivoted into the position shown in dashed lines in Figure 2 position. About the gear 28, the shaft 8 is rotated, wherein the pawl 25 lifts the pawl 21 from the stop 19 and the cap segment 6 by the action of

Compression spring 10 is pivoted about the shaft 8 and rests with the elastic strip 13 on the guide 14,15. In order to

the working position of the device according to FIG. 2 is set.

During the rotational movement of the sheet guiding cylinder 3 in the inching operation pushes backwards on the guide 14,15

adjacent elastic strips 13, the sheets and / or elbows in the direction tangent point 17. The on the

Control valve 27 with suction air acted upon suction chambers 11 of the elastic strip 13 hold the sheet in addition, what

Especially at the joints within the guide 14, 15 and in the promotion of the elbows in the area of the first impression cylinder 1 is required. In addition, the curved pieces are promoted by the negative pressure in the suction chamber 11 and the tannin point 17 until the elbows can be removed manually. As a result, can be removed with ease Bedienhan Jlung elbows and any sheet sizes from the range of the guide 14,15.

By the individual., The en of the guide 14,15 adjacent and equipped with a respective compression spring 10 Cap segments 6 will eventually have non oarallelity within the guide 14,15 over the entire Working area of the device according to the invention balanced. As the capping segments 6 advance past the first impression cylinder 1, the cap segments 6 move in the direction Operating position shown in FIG. 1 pressed. The pawl 21 engages in the stop 19 and holds the cap segments 6 in

this position. After completion of the work by turning back the control values 23 of the driver 20 by the

Shift eccentric 24 pressed so far that the cap segments 6 have taken their original position again. there

the Saugiuftsteuerkurve 26 is rotated and the suction cut off and switched back through the switching plate 30 of the limit switch 31, so that the machine lock is canceled again and the guide 15 pivots back into the operating position.

Claims (2)

The invention relates to a device for removing sheets and / or sheets under sheet guiding cylinders of sheet-fed rotary printing machines, which can be operated either in beautiful or perfecting and with the sheet and / or elbows are promoted in the direction tangent point from the upstream printing cylinder and sheet guiding cylinder can, wherein under the Bogenfür tion cylinder a the sheet path adaptable baffle and the circumference of Bogenführungszylinde, η a drum cap are provided, characterized in that the drum cap (6) consists of pivotally mounted Kap lensegmenten (6) and in the direction of gripper (5) with a pneumatically actuated with de 'suction opening facing outwards, by an elastic strip (13) enclosed, suction box (11) is equipped. For this 2 pages drawings