DE102018217256B3 - sheet feeder - Google Patents

Abstract

A sheet feeder (1) comprises a side draw mark, a feed table (2) and a plurality of hold-downs (7) for pressing sheets against the feed table (2). The side draw mark may include a draw mark plate (11).
The hold-down devices (7) each have a detent (13) and the side-tightening handle has a stop (12) for releasing the detents (13).

Description

The present invention relates to a sheet feeder comprising a side draw mark, a feed table and a plurality of hold-downs for pressing sheets against the feed table.

In DE 29 37 541 B2 a sheet feeder is described in which the respective hold-down comprises a spring leaf, which is movable together with the sheet in the direction of the side pulling mark.

In DE 42 42 606 A1 a sheet feeder is described, which is connected via a sheet feeder and a plant traverse with a stop drum. Before the stop drum, a sheet guiding device in the form of a hold-down is arranged. The sheet guiding device comprises sheet guiding elements whose adjustment takes place on a tab. The driving force for the tab can be removed from a side pull mark.

In DE 44 35 264 Al is a device with bow hold downs described, each having a holding plate which is arranged on a cross member transversely to the sheet transport direction adjustable.

The object of the invention is to provide a further sheet feeder.

This object is achieved by a sheet feeder, comprising a side puller, a feed table and a plurality of hold-down for pressing sheets to the feed table, characterized in that the hold-down each having a detent and that the side puller has a stop for releasing the notches.

An advantage of the sheet feeder according to the invention is that such collisions between the side draw mark and the hold-downs are prevented from which damage could result. An additional advantage is to be seen in the high ease of use of the hold-down, whereby the set-up times are shortened.

• Die Niederhalter können jeweils eine Rückstellfeder aufweisen, die den Niederhalter aus einer Aktivposition in eine Passivposition verstellt.
• Die Niederhalter können jeweils einen Griff zum Verstellen des Niederhalters aus der Passivposition in die Aktivposition aufweisen.
• Die Niederhalter können jeweils ein Niederhalteblatt aufweisen und dieses kann sich in der Aktivposition näher als in der Passivposition an einer Bogenlaufebene des Anlegetisches befinden.
• Die Seitenziehmarke kann eine Ziehmarkenplatte aufweisen und an dieser kann der Anschlag angeordnet sein.
• Die Ziehmarkenplatte kann in eine Stellrichtung auf die Niederhalter zu verstellbar gelagert sein.
• Die Niederhalter können jeweils eine Stange aufweisen, die verschiebbar gelagert ist, und ein erstes Eingriffselement der Rastung kann an der Stange angeordnet sein.
• Das erste Eingriffselement kann eine Mulde sein.
• Ein zweites Eingriffselement der Rastung kann gefedert sein.
• Das zweite Eingriffselement kann an einer Blattfeder angeordnet sein.
• Der Anschlag kann beim Lösen der Rastung an der Blattfeder anschlagen.
• Das zweite Eingriffselement kann ein Stift sein.

There are various training possible:

• The hold-downs may each have a return spring which moves the hold-down from an active position to a passive position.
• The hold-downs can each have a handle for adjusting the hold-down from the passive position to the active position.
• The hold-downs may each have a hold-down blade and this may be closer in the active position than in the passive position at a sheet running plane of the feed table.
• The side puller may have a Ziehmarkenplatte and at this stop may be arranged.
• The Ziehmarkenplatte can be stored in a direction adjustable to the hold down to adjustable.
• The hold-downs can each have a rod which is displaceably mounted, and a first engagement element of the detent can be arranged on the rod.
• The first engagement element may be a trough.
• A second engagement element of the detent can be sprung.
• The second engagement element can be arranged on a leaf spring.
• The stop can strike when releasing the detent on the leaf spring.
• The second engagement element may be a pin.

• 1: eine Seitenansicht eines Anlagetisches mit Niederhaltern, wobei diese in eine Aktivposition abgesenkt sind,
• 2: eine Draufsicht auf den Anlagetisch mit den Niederhaltern und
• 3: eine Seitenansicht des Anlagetisches, wobei die Niederhalter in eine Passivposition angehoben sind.

Further developments will become apparent from the following description of an example and the accompanying drawing, in which:

• 1 FIG. 2: a side view of a plant table with hold-downs, these being lowered into an active position, FIG.
• 2 : A top view of the investment table with the holdings and
• 3 : A side view of the investment table with the hold downs raised to a passive position.

A sheet feeder 1 a printing press comprises a feed table 2 with a in sheet travel direction 3 inclined sheet plane 4 which is made by a table sheet. A traverse 5 is perpendicular to the sheet travel direction 3 oriented and runs horizontally from the drive side to the operating side of the printing press. The traverse 5 is on the drive side and the operating side each of a holder 6 worn, which is attached to the table plate. At the Traverse 5 are identical holding-down devices 7 attached in a row.

Every hold-down 7 includes a pole 8th as a slide and a housing 9 as a guide for the pole 8th , At the rod 8th is a hold-down sheet 10 arranged from spring plate, which the bow against the sheet travel plane 4 pushes when the bow passes through a conveyor belt of the investment table 2 in sheet travel direction 3 be transported. In sheet travel direction 3 at the level of the holddown 7 is a side-puller with a Ziehmarkenplatte 11 from an angled sheet metal. At the drag mark plate 11 is a pin as a stop 12 arranged.

Every hold-down 7 has a detent 13 on top of the moving part of the holddown 7 - So the rod 8th and the hold-down sheet 10 - holds in an asset position that is in 1 is shown. In the active position, the hold-down presses 7 the bows against the sheet walk level 4 , The detent 13 includes a recess as a recess 14 in the bar 8th and as a spring-loaded blocker a pen 15 on a leaf spring 16 on the case 9 is attached. The pole 8th is by a return spring 17 charged, which the rod 8th moved from the active position to a passive position as soon as the detent 13 is solved. In the passive position, which is in 3 is shown, there is the hold-down 7 no longer in the collision area of the side-pull mark. The return spring 17 is in the case 9 integrated and sitting on the pole 8th , To the pole 8th with the hold-down sheet 10 from the passive position back to the active position to adjust, is on the pole 8th a handle eighteen arranged.

In 1 is shown that the hold down leaf 10 in sheet travel direction 3 between a foreign body barrier 19 and a front-end protection 20 located. With a double arrow is the switching movement 21 symbolizes with which the downholder 7 from the asset item to the liability position and from this back to the asset position.

• Bei einem Wechsel von einem größeren zu einem kleineren Format der Bogen muss die Seitenziehmarke neu eingestellt werden, um sie der Breite des kleineren Formats anzupassen. Dazu wird die Ziehmarkenplatte 11 in eine mit der Reihe von Niederhaltern 7 parallele Stellrichtung 22 verstellt. Dabei tritt die Seitenziehmarke mit der Rastung 13 jedes sich im Verstellweg der Seitenziehmarke befindenden Niederhalters 7 in Kontakt, wodurch die Rastung 13 gelöst wird. Im Speziellen geschieht dies dadurch, dass der Anschlag 12 auf die Blattfeder 16 trifft und dadurch den Stift 15 aus der Mulde 14 hebt. Der Anschlag 12 ragt in Stellrichtung so weit über die Ziehmarkenplatte 11 hinaus, dass der Anschlag 12 die Rastung 13 löst, bevor die Ziehmarkenplatte 11 auf das Niederhalteblatt 10 trifft. Nach dem Lösen der Rastung 13 kann die Rückstellfeder 17 die Stange 8 nach oben schieben. Dabei wird das Niederhalteblatt 10 so weit von der Bogenlaufebene 4 abgehoben, dass die Seitenziehmarke unter dem Niederhalteblatt 10 an dem Niederhalter 7 vorbeifahren kann. Gegebenenfalls schaltet die Seitenziehmarke noch einen oder mehrere weitere Niederhalter 7 in der Reihe in die Passivposition. Die Anzahl der von der Seitenziehmarke geschalteten Niederhalter 7 hängt von der Differenz zwischen der alten Bogenbreite vor dem Formatwechsel und der neuen Bogenbreite nach dem Formatwechsel ab.

The illustrated device works as follows:

• When switching from a larger to a smaller size sheet, the page picker must be readjusted to fit the width of the smaller size. This is the Ziehmarkenplatte 11 in one with the series of hold-downs 7 parallel direction of adjustment 22 adjusted. In this case, the side pull mark occurs with the detent 13 each hold-down located in the adjustment of the side-pull mark 7 in contact, causing the detent 13 is solved. In particular, this happens because the attack 12 on the leaf spring 16 meets and thereby the pin 15 from the hollow 14 lifts. The stop 12 protrudes in the direction of adjustment so far on the Ziehmarkenplatte 11 addition, that the stop 12 the detent 13 releases before the pull mark plate 11 on the hold-down sheet 10 meets. After releasing the detent 13 can the return spring 17 the pole 8th push up. This is the hold-down sheet 10 so far from the sheet walk level 4 lifted off, that the side-pull mark under the hold-down sheet 10 at the hold-down 7 can pass. Optionally, the side pull mark switches one or more further hold-down 7 in the row to the passive position. The number of holders connected by the side pull mark 7 depends on the difference between the old sheet width before the format change and the new sheet width after the format change.

Is in another format change the conversion of the sheet feeder 1 From a small sheet size to a large sheet size is required, the Ziehmarkenplatte 11 against the direction of adjustment 22 moved to the machine side. It goes the Ziehmarkenplatte 11 on at least one downholder 7 over, which is in the passive position. After the pull mark plate 11 this hold down 7 has happened and there is no risk of collision, the operator presses on the handle eighteen the pole 8th against the action of the return spring 17 back down until the detent 13 snaps again and thereby the rod 8th locked in the active position.

LIST OF REFERENCE NUMBERS

1

sheet feeder

2

feed table

3

Sheet running direction

4

Sheet travel plane

5

traverse

6

holder

7

down device

8th

pole

9

casing

10

Hold-down sheet

11

Pull guide plate

12

attack

13

latching

14

trough

15

pen

16

leaf spring

17

Return spring

18

Handle

19

Catch for foreign substances

20

Front TRADEMARK

21

switching movement

22

setting direction

Claims (12)

Sheet feeder comprising a side-puller, a feed table (2) and a plurality of hold-downs (7) for pressing sheets against the feed table (2), characterized in that the hold-down device (7) each have a detent (13) and that the side-puller has a stop (12) for releasing the detents (13). Sheet feeder after Claim 1 , characterized in that the hold-down device (7) each have a return spring (17) which moves the hold-down (7) from an active position to a passive position. Sheet feeder after Claim 2 , characterized in that the hold-down (7) each have a handle (18) for adjusting the hold-down (7) from the passive position to the active position. Sheet feeder after Claim 2 or 3 , characterized in that the hold-down (7) each have a hold-down blade (10) and this is closer in the active position than in the passive position at a sheet running plane (4) of the investment table (2). Sheet feeder after one of Claims 1 to 4 , characterized in that the side pulling mark has a Ziehmarkenplatte (11) and at this stop (12) is arranged. Sheet feeder after Claim 5 , characterized in that the Ziehmarkenplatte (11) is mounted in an adjustment direction (22) on the hold-down (7) to adjustable. Sheet feeder after one of Claims 1 to 6 , characterized in that the hold-down device (7) each have a rod (8) which is displaceably mounted, and that a first engagement element of the detent (13) on the rod (8) is arranged. Sheet feeder after Claim 7 , characterized in that the first engagement element is a trough (14). Sheet feeder after Claim 7 or 8th , characterized in that a second engagement element of the detent (13) is sprung. Sheet feeder after Claim 9 , characterized in that the second engagement element is arranged on a leaf spring (16). Sheet feeder after Claim 10 , characterized in that the stop (12) when releasing the detent (13) on the leaf spring (16) abuts. Sheet feeder after Claim 10 or 11 , characterized in that the second engagement element is a pin (15).

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