DE102020125520A1 - Feeder of a sheet processing machine with a blowing device - Google Patents

Abstract

A feeder according to the invention for a sheet processing machine, in which a stack of sheets to be processed can be accommodated, and which comprises at least one handling tool, through which an uppermost sheet of a stack accommodated in the feeder moves in a transport direction away from the stack into a downstream subsequent transport path can be transported, comprises a blowing device, through which sheets of a stack received in the feeder are folded on a side flank, d. H. on a side of the stack running vertically and parallel to the direction of transport, can be subjected to blowing air in the region of their sheet edge. The blowing device is mounted in or on the feeder so that it can be displaced along a mechanically predetermined movement path with at least one movement component transverse to the transport direction.

Description

The invention relates to a feeder of a sheet processing machine with a blowing device according to the preamble of claim 1.

Feeders are used on sheet-fed printing machines in order to separate sheets of different material that have been prepared on stacks and feed them to the printing machine. The sheets are separated and fed by so-called sheet separators. In order to be able to separate the sheets better, blowing devices are often provided by which the sheets can be subjected to blowing air from one side of the stack.

From the DE 10 2017 210 247 A1 a feeder of a sheet-fed printing press is known, in which blowing elements, so-called

Side blowers are provided. The side blowers can be adjusted in the longitudinal direction on a rail that extends in the sheet transport direction, e.g. B. by engagement with a threaded rod which can be driven in rotation by means of a servomotor hidden in the legs of the investor.

The object of the invention is to create an improved feeder for a sheet processing machine with a blowing device.

The object is achieved according to the invention by the features of claim 1.

The advantages that can be achieved with the invention consist in particular in the fact that the blowing device can be adjusted or at least preset in a simple and/or reliable manner, in particular in a defined and reproducible manner.

A setting or at least a presetting to adjust the lateral position of blow heads when the sheet format changes with a different width can take place without manual intervention.

It is of particular advantage if the lateral position of the blowing device is adjusted together with the adjustment of side stops and/or at the same time as an adjusting movement in the transport direction of the sheets.

The side blowers can be adjusted or tracked with a format change without z. B. to collide with the simultaneously movable sheet separator and possibly its device carrier or avoid by deformation.

In the event that the side blowers, in addition to being relocatable, also have a movable nozzle head, it may be possible and/or useful, after a defined and/or forced adjustment of the side blower position, to carry out a fine adjustment by appropriately adapting the course of flexible hose lines. In this case, however, due to the low need for adjustment, no hose lines that are flexible in length to the nozzle head are required.

In an embodiment of a feeder for a sheet processing machine that is particularly advantageous for the invention, in which a stack of sheets to be processed can be accommodated, and which comprises at least one handling tool, through which a top sheet of a stack accommodated in the feeder is moved in a transport direction can be transported away from the stack into a transport path adjoining downstream, a blowing device is provided, by which sheets of a stack received in the feeder are folded on a side flank, d. H. on a side of the stack running vertically and parallel to the direction of transport, can be subjected to blowing air in the region of their sheet edge.

In the embodiment according to the invention, the blowing device is mounted in or on the feeder so that it can be displaced along a mechanically predetermined movement path with at least one movement component transverse to the transport direction.

In a particularly advantageous embodiment, a drive means is provided, by means of which the displacement of the blower element can be brought about directly or indirectly.

In a likewise particularly advantageous embodiment, the blowing device and a stop element whose position can be adjusted transversely to the transport direction are mechanically coupled to one another in the feeder in such a way that the setting of the stop element and the displacement of the blowing device are forcibly coupled by an actuator.

Advantageous developments can be found in the dependent claims and the following exemplary embodiments.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

• 1 eine schematische Darstellung eines Anlegers und einer einem Druckwerk vorgeordneten Bogenanlage einer Bogendruckmaschine in Seitenansicht;
• 2 eine Schrägansicht auf eine Oberseite eines Stapels eines ersten Bogenformates mit Bogentrenner, Seitenanschlägen und Blaseinrichtungen;
• 3 eine Draufsicht auf die Anordnung aus 2 für den Fall eines ersten Bogenformates;
• 4 eine Draufsicht auf die Anordnung aus 2 für den Fall eines zweiten, gegenüber dem ersten Bogenformat erheblich kleineren zweiten Bogenformates.

Show it:

• 1 a schematic representation of a feeder and a printing unit upstream sheet feeder of a sheet-fed printing press in side view;
• 2 an oblique view of a top of a stack of a first sheet format with sheet separators, side stops and blowing devices;
• 3 a top view of the arrangement 2 in the case of a first sheet format;
• 4 a top view of the arrangement 2 in the case of a second sheet format that is considerably smaller than the first sheet format.

In 1 a machine that treats or processes sheets 06, which is preferably designed as a sheet-fed printing press, is shown as an example and in part. In principle, however, it can also be processed by another machine that treats or processes sheets 06, e.g. B. a punch, cutting, painting or other machine with the requirement of an input-side sheet separation can be formed.

The sheet 06 treating or processing machine explained here using the example of a sheet-fed printing press comprises a feeder 01, e.g. B. pile or sheet feeder, a conveyor table 02, a sheet feeder 03 and following the sheet feeder 03 one or more units 04, not shown here in detail, for treating and/or processing the sheets 06 as shown here, e.g. B. a printing unit 04, coating unit, drying unit, calendering unit or the like.

A stack 09, for example a stack of sheets 09, is placed on a stacking table 10 in feeder 01. The stacking table 10 can be adjusted in height with the aid of a lifting device 11 in order to raise the top sheet 06 of the stack of sheets 09 to a fixed or only slightly variable height, regardless of the number of sheets 06 in the stack 09, so that it is suitable for transferring the sheets 06 to the belt table 02 keep. In the representation of 1 if the sheets 06 of the stack 09 lie directly on the stacking table 10, but there could also be a pallet between the stack 09 and the stacking table 10, on which the stack 09 was transported to the stacking table 10 and placed on it and the height of which is not known that the position of the lifting device 11 cannot be used to determine the height of the stack 09 or the number of sheets 06 contained in the stack 09.

A front stop 16 defines a vertical plane in which the front edges of the sheets 06 of the sheet stack 09 are positioned. A curved flap 17 is fitted around a flap shaft 18 between the in 1 shown, which extends the front stop 16 in a straight line and can be pivoted counterclockwise into a substantially approximately horizontal position, in which it supports the transport of the sheets 06 to the downstream belt table 02.

The feeder 01 comprises various tools, combined here in a sheet separator 14, for dividing the stack 09 into individual sheets 06 and for transporting the sheets 06 away to the printing units 04 and possibly other units 04 of the sheet-fed printing press.

These tools include, on the one hand, a plurality of so-called suction cups 12, in particular handling tools 12 embodied as separating or lifting suction cups 12, in particular lifting tools 12, which are arranged above a rear edge 05 of the stack 09 in the transport direction T of the sheets 06 and can be moved essentially in the vertical direction are. The separating suckers 12 each comprise a suction cup made of flexible plastic which is open at the bottom towards the stack 09 and is connected at its upper end to a common vacuum source. The negative pressure must be sufficient to allow the suction cups to adhere securely to the sheet 06 to be lifted from the stack 09, but it must not be so strong that it draws the sheet 06 into the suction cup and deforms it as a result. If not all of the suction cups of the separating suction device 12 are in contact with a sheet 06 to be lifted, the air flow over an uncovered suction cup can result in the other suction cups not achieving the negative pressure required for lifting. For a safe lifting of a sheet 06, it is therefore important that all suction separators 12 come into contact with it at the same time. For this purpose, each sucker separator 12 can be movable relative to the sheet separator 14 with the aid of its own drive, in particular a linear actuator; a common frame in which all sucker separators 12 are held is preferably movable relative to the sheet separator 14 with the aid of a fast, powerful main actuator , in order to suck up the sheet 06 from the stack 09 and lift it along the rear edge 05 of the sheet 06, and to even out any unevenness on the upper side of the stack 09 and to ensure simultaneous contact of all suction separators 12 with the sheet 06 to be lifted, the suction separators 12 are Adjustable relative to the frame by means of auxiliary actuators, the latter of which can be slower and have a smaller stroke than the main actuator.

As a further tool of the sheet separator 14, a tool 15 designed as a feeler foot 15 can be provided, which is located between an in 1 shown, along the edge 05 on the stack 09 depressing holding position and compared to the holding position raised and ent counter to the transport direction T behind the rear edge 05 of the sheet 06 and can be moved to a rest position that is offset. The tool 15, for example the feeler foot 15, is placed in the holding position when the top sheet 06 of the stack 09 has been lifted by the suction separators 12 along the rear edge 05, in order to prevent the underlying sheets 06 of the stack 09 from being whirled up when a blowing device 19 arranged behind the rear edge 05 at the level of the top of the stack 09 blows air into an open gap 07 between the lifted sheet 06 and the rest of the stack 09.

In addition, suction devices 13, in particular embodied as transport suction devices 13, are provided on sheet separator 14, in particular handling tools 13, in particular transport tools 13, which perform a predominantly vertical movement in or counter to transport direction T of sheets 06. Like the suction separators 12, the transport suckers 13 have flexible suction cups which, after the suction separators 12 have been raised, are subjected to a vacuum in order to pull the lifted sheet 06 towards them. At the same time, vacuum is no longer applied to suction separators 12, so that they release sheet 06. The air blown into gap 07 by blower device 19 lifts sheet 06 over its entire surface from stack 09 and forms an air cushion under sheet 06, on which sheet 06, driven by the horizontal movement of transport suckers 13, over which the the horizontal pivoted sheet flap 17 is pushed away onto the belt table 02.

Aforesaid sucker 12; 13 can alternatively also be designed as working according to the Bernoulli principle, in short as a so-called Bernoulli suction device. In this case, the above applies accordingly with the difference that they are connected to an overpressure source and are or are operated with air that is under overpressure compared to the environment.

The belt table 02 downstream of the feeder 01 is designed as a suction belt table 02 in the exemplary embodiment. It preferably comprises two rollers 20; 21, for example a drive roller 20 and a deflection roller 21. Between the two rollers 20; 21 extends a one-part or multi-part table plate 22. The table plate 22 forms the multiple perforated upper side of a suction box 23. The drive roller 20 and the deflection roller 21 are wrapped by at least one conveyor belt 24 which, like the table plate 22 over which it extends, is perforated many times, so that it is not sucked onto the table plate 22, but a sheet 06 is sucked onto the conveyor belt 24.

The circumferential speed of the conveyor belt 24 is generally lower than the ratio of the edge length of the sheets 06 to the cycle time of the sheet separator 14, so that when the transport suckers 13 begin to push a new sheet 06 over the sheet flap 17, the previous sheet 06 has not yet completely pushed it happened. A shingled flow of sheets 06 is thus formed on the conveyor belt 24, in which the number of sheets 06 overlapping one another is variable depending on the circulation speed, edge length and cycle time.

The sheet feeder 03, to which the sheets 06 are conveyed by the circulating conveyor belt 24, comprises a feed table 26 and, on a rear edge of the feed table 26 in the transport direction T of the sheets 06, stops 27, which from their in 1 shown, blocking the conveying path of the sheets 06, can be lowered in order to clear the path for a sheet 06 resting against the stops 27 to the following printing unit 04, from which in 1 a transfer drum 29, an impression cylinder 30 and a blanket cylinder 31 are shown.

In order to support the separation and/or feeding of sheets 06 into the machine, at least one blowing device 32, e.g. B. a so-called. H. vertical and parallel to the transport direction T running stack side, can be acted upon in the region of their sheet edge with blown air of a blast air jet.

The at least one blowing device 32 is preferably arranged in feeder 01 such that its jet of blowing air is directed onto an upper lateral region of stack 09, i. H. in particular that this blowing device 32 within an upper area, i. H. lying sheets 06 can be charged with blast air from the side within an area extending downwards from the top edge of the stack up to a maximum of 300 mm.

Preferably, at least one blowing device 32 of this type is provided on each of the two opposing sides of the stack, which run vertically and parallel to the direction of transport. Seen in the transport direction T, several blowing devices 32 of this type can be provided for each side of the stack.

In order to adapt or track the position of the blowing device 32 to the position of the stack side to be blown when changing a sheet format, the blowing device 32 is along a mechanically predetermined movement path with at least one movement component transverse to the trans port direction T relocatably stored in or on the feeder 01. In principle, this can be done by an autonomous bearing without any coupling to other elements that are to be set and used for sheet conveyance and/or alignment and/or by a separate drive. A mechanical specification means e.g. B. basically any type of trajectory predetermined by the mechanics, such. B. by guides and / or forced by the degrees of freedom of gears and / or drive means movement paths.

In a preferred embodiment, however, the blowing device 32 is provided with a stop element 33, in particular a lateral stop 33, which can be adjusted in its position transversely to the transport direction T, or a holder 38 carrying the stop element 33, or a drive means which sets the stop element 33 directly or indirectly and is in particular a remote-controlled drive means 39, e.g. g. a drive motor 39 comprising an actuator 39, 46, is mechanically coupled in feeder 01 in such a way that, preferably when stop element 33 is set, it is forced to change its position with at least one movement component transverse to transport direction T, or alternatively vice versa when blowing device 32 is set Stop element 33 is provided.

Basically independent of the above Coupling, but preferably in connection with this, the blowing device 32 is preferably on a support element 34, z. B. a carrier 34, which is mounted in or on the feeder 01 so that it can be displaced in such a way that the blowing device 32 can be displaced or is displaced transversely to the transport direction T by or when the support element 34 is displaced. In the event of the above coupling, the support element 34 is operatively connected, for its displacement, to the stop element 33 or to the actuator 39, 46 that drives the stop element 33 directly or indirectly, or to its drive means 39, in such a way that when the stop element 33 is moved to the side, the blowing device 32 is forced to be moved with at least a lateral movement component takes place or, as already explained above, in an alternative, vice versa, when the support element 34 is set, the stop element 33 is also moved.

In a particularly advantageous development, the blowing device 32 is mounted in or on the boom 01 in such a way that, when it is displaced along the mechanically specified movement path, the displacement of the blowing device 32 transversely to the transport direction T is also automatically displaced along the transport direction T. This takes account of the fact that a narrower sheet format usually also has a shorter sheet length in the transport direction T. The site of action of the blower 32 is thus z. B. simultaneously shifted inwards and in the transport direction T to the front.

Although such a forced movement with both a component in and a component transverse to the transport direction T can be achieved by any suitable guide or gear form, the support element 34 in the preferred embodiment here is mechanically attached to the transversely movable stop element 33 or to one of these in the area of a first coupling point 36 supporting transversely movable bracket 38 coupled and in the region of a second coupling point 37 along a mechanically predetermined movement path with at least one movement component in the transport direction T, in particular linearly movable preferably in the transport direction T, movable in or on a z. Am 3 and 4 only hinted frame part 41 of the investor 01 stored. The linearly movable coupling at the second coupling point 37 can be realized via a linear guide 42 provided on the frame part 41, on or in which a coupling element 43 provided on the support element 34 can be moved linearly back and forth in the manner of a carriage, in particular along the transport direction T.

The lateral adjusting movement of the stop elements 33 arranged on both sides can take place, for example, via a common threaded spindle 46 with opposing thread sections, which is driven in rotation by a drive motor 39 comprised by the adjusting drive 39, 46, or preferably via two separate threaded spindles 46 driven by respective drive motors 39 .

In an advantageous development, the blowing device 32 on the support element 34 with regard to its position between the two coupling points 36; 37 can be positioned, whereby a basic setting for the position of the blowing device 32 relative to the stack 09 can be varied. For this purpose, the carrier 34 z. B. in the form of an elongated guide rail 34, on which the blowing device 32 is arranged in a variable position or can be arranged. Since this positioning is only used to set a basic setting, it can be effected manually. In a development, however, a positioner drive can be provided for this purpose, which allows the blower device 32 to be positioned on the support element 34 by remote control.

The blowing device 32 can be formed by a single or multi-jet nozzle, which is arranged on the support element 34 in a fixed manner but can be positioned if necessary. In the embodiment shown, it comprises a single or multi-jet nozzle head 47, which is connected via a flexible hose line 48 is arranged on the support element 34. In the case of the aforementioned positionability, the hose line 48 can open out into a foot 44 at the end remote from the nozzle head, which is provided, for example, by the coupling element 43 or is arranged on it and, if necessary, is fastened to the support element 34 so that it can be positioned. A supply of the blower devices 32 with blower air is not shown in the exemplary illustrations.

Reference List

01

investor

02

Belt table, suction belt table

03

arch system

04

work, printing work

05

edge, rear

06

bow

07

gap

08

-

09

Stack, stack of sheets

10

stacking table

11

lifting device

12

Handling tool, lifting tool, suction cup, separating suction cup, lifting suction cup

13

Handling tool, transport tool, suction cup, transport suction cup

14

sheet separator

15

tool, tracer foot

16

front stop

17

bow flap

18

flap shaft

19

blowing device

20

roller, drive roller

21

roller, deflection roller

22

table sheet

23

suction box

24

conveyor belt

25

-

26

feeding table

27

attack

28

-

29

false drum

30

Impression cylinder

31

blanket cylinder

32

blowing device, side blower

33

Stop element, side stop

34

Supporting element, carrier, guide rail

35

-

36

Coupling point, first

37

Coupling point, second

38

bracket

39

Drive means, drive motor

40

-

41

frame part

42

linear guide

43

coupling element

44

foot

45

-

46

lead screw

47

nozzle head

48

hose line

T

transport direction

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102017210247 A1 [0003]

Claims (10)

Feeder (01) of a sheet (06) treating or processing machine, in which a stack (09) of sheets (06) to be processed can be accommodated, and at least one handling tool (13) through which a top sheet (06) of an im feeder (01) can be transported in a transport direction (T) away from the stack (09) into a downstream transport path, with a blowing device (32) being provided, through which sheets (06) of a feeder (01 ) picked up stack (09) on a side of the stack (09) running vertically and parallel to the transport direction (T) in the region of its lateral sheet edge can be subjected to blowing air, characterized in that the blowing device (32) along a mechanically predetermined movement path with at least one Movement component is mounted transversely to the transport direction (T) displaceable in or on the feeder (01). investors after claim 1 , characterized in that a drive means (39) is provided, by which the displacement of the blower element (32) can be effected directly or indirectly. investors after claim 1 or 2 , characterized in that the blowing device (32) and a stop element (33) whose position can be adjusted transversely to the transport direction (T) are mechanically coupled to one another and are mounted in the feeder (01) in such a way that the setting of the stop element (33) and the displacement of the Blowing device (32) by an actuator (39, 46) is forcibly coupled. investors after claim 3 , characterized in that the blowing device (32) with the stop element (33) whose position can be adjusted transversely to the transport direction (T), its holder (38) or its actuating drive (39, 46) is mounted in the feeder (01) mechanically coupled in this way that when the stop element (33) is set by an actuator (39, 46) assigned to it, the blowing device (32) is forced to follow up with at least one movement component transversely to the transport direction (T). investors after claim 1 , 2 , 3 or 4 , characterized in that the blowing device (32) is arranged on or on a support element (34) which is mounted in or on the feeder (01) so that it can be moved in such a way that the blowing device (32) can be moved transversely to the transport direction by moving the support element (34). (T) is displaceable. investors after claim 5 and one of the claims 3 or 4 , characterized in that the support element (34) is mechanically coupled to the stop element (33), a holder (38) carrying the stop element (33) or its actuator (39, 46) in such a way that the support element carrying the blowing device (32). (34) when the stop element (33) is set to the side, it is forced to move with at least one movement component transversely to the transport direction (T) to the same side as the stop element (33). investors after claim 1 , 2 , 3 , 4 , 5 or 6 , characterized in that the mechanically predetermined path of movement is designed, together with the displacement of the blowing device (32) transversely to the transport direction (T), forcibly also to bring about a displacement along the transport direction (T). investors after claim 7 and one of the Claims 5 or 6 , characterized in that the support element (34) carrying the blowing device (32) is mechanically coupled to the transversely movable stop element (33) or its holder (38) in the region of a first coupling point (36) and in the region of a second coupling point ( 36) in the transport direction (T) spaced coupling point (37) along a mechanically predetermined movement path with at least one movement component in the transport direction (T) is mounted in or on a frame part (41) of the feeder (01) so that it can move. investors after claim 8 , characterized in that the blowing device (32) can be positioned and fixed at different points on or on the support element (34) with regard to its relative position between the two coupling points (36; 37). investors after claim 5 , 6 , 7 , 8th or 9 , characterized in that a plurality of blowing devices (32) spaced apart from one another in the transport direction (T) are provided on the carrying element (34).

Images