EP1582491B1 - Device for transporting flat workpieces - Google Patents

Abstract

The conveying apparatus includes an intake jaw (33) formed from two conveyors (1,2). The geometry of the intake jaw is variable so that either the lower part of the jaw projects beyond the lower part of the jaw, or the upper part projects beyond the lower part. Alternatively, the two parts may be flush.

Description

The invention relates to a device for transporting flat workpieces in a transport direction with a first conveyor contacting a first surface of a respective one of the workpieces, a second conveyor contacting a second surface of a respective one of the workpieces opposite the first surface and one of the two Conveyors formed inlet mouth with a mouth base and a mouth upper part.

Such a device is, inter alia, part of a standing-sheet delivery, which was sold by the applicant under the type designation SBP. The flat workpieces thus transported in a conveying direction are, for example, brochures which are taken over by a processing station located upstream of the transport direction, such as a pre-station in the form of a folding machine or a saddle stitcher, etc., and to a further processing station located downstream, such as For example, a press station to be handed over.

Different types of said Vorstationen have in particular also different outlet heights. Since the brochures are to be delivered by the transporting device on an ergonomic level, the known device is pivotally arranged so that can be adjusted at different outlet heights of different Vorstationen at substantially retained outlet height of the device whose inlet height.

The conveyor of the known device are designed as traction drives. Accordingly, the device comprises sidewalls and axles and shafts mounted thereon for guide and drive rollers for traction means designed in the form of endless round belts, which form mutually facing conveyor runs which extend from an inlet mouth to an outlet mouth. The inlet mouth and the outlet mouth have a fixed geometry. In order to counteract thereby deteriorated run-in behavior of the flat workpieces in certain pivotal positions of the Zugmittelförderers, whose length is such that even with a relatively small pivoting range the inlet mouth can be raised and lowered within a sufficiently large area.

The invention has the object of providing a device of the type mentioned in such a way that even with a reduced compared to the aforementioned prior art length results in a favorable running-in behavior of the flat workpieces in the device.

To solve this problem, such a variable geometry of the inlet mouth is provided that in a first case, the mouth base projects beyond the mouth upper part and in a second case, the mouth upper part projects beyond the mouth base.

An advantageous development provides that different distances of the two conveyors can be adjusted to adapt to different thicknesses of the flat workpieces. This is for example in an embodiment of the conveyor in the form of traction drives particularly advantageous if rollers for driving and guiding a first traction mechanism directly opposite those of the second traction mechanism drive.

Such a configuration is, for example, when one of the two traction mechanism drives is approximately a mirror image of the other and both are not shifted from each other, as may well be provided in a horizontal orientation of the conveyor. In this respect, the adjustability to different thicknesses of the flat workpieces widens the field of application of the device, in particular when equipped with displaceably arranged conveyors.

The features of the invention and an embodiment thereof can be taken from the attached drawings and the subsequent explanations referring thereto.

Fig. 1

unter Anderem ein Ausführungsbeispiel einer Vorrichtung zum Transport flächiger Werkstücke, wobei Förderer in Form von Zugmitteltrieben vorgesehen sind, die im dargestellten Fall waagerecht ausgerichtet sind,

Fig. 2

den Gegenstand gemäß Fig. 1 mit gegeneinander verstellten und in eine ersten Richtung geneigten Zugmitteltrieben,

Fig. 3

den Gegenstand gemäß Fig. 1 mit gegeneinander verstellten und in eine zweite Richtung geneigten Zugmitteltrieben,

Fig. 4

ein Mittel zur Anpassung der Vorrichtung an unterschiedliche Dicken der flächigen Werkstücke aufweisendes Detail der Fig. 1,

Fig. 5

eine Darstellung der Vorrichtung gemäß Fig. 1, bei welcher Mittel zum Antrieb derselben und zur Arretierung der Förderer in gegenseitigen Relativlagen hervorgehoben sind.

In the drawings shows:

Fig. 1

Among other things, an embodiment of a device for transporting flat workpieces, wherein conveyors are provided in the form of traction mechanism drives, which are aligned horizontally in the illustrated case,

Fig. 2

the object according to Fig. 1 with mutually adjusted and in a first direction inclined traction drives,

Fig. 3

the object according to Fig. 1 with mutually adjusted and in a second direction inclined traction drives,

Fig. 4

a means for adapting the device to different thicknesses of the flat workpieces exhibiting detail of Fig. 1 .

Fig. 5

a representation of the device according to Fig. 1 in which means for driving the same and for locking the conveyor are highlighted in mutual relative positions.

As in Fig. 1 recognizable, in the embodiment described below, the first conveyor 1 is formed by means of a first traction mechanism drive 1 'and the second conveyor 2 by means of a second traction mechanism drive 2'. These essentially have a geometry mirrored on a conveying plane 3 and comprise at a respective first and at a respective second end a plurality of deflection rollers 4.1 to 4.4, which are looped around by endless belts 5. The belts 5 of the first traction mechanism drive form first conveyor runs, which face the second conveyor belts formed by the belts 5 of the second traction mechanism 2 'and the first conveyor runs contact a first surface of a flat workpiece 6 to be conveyed, while the second conveyor runs one of the operational conveyor belts first surface opposite the second surface to be conveyed in a transport direction according to arrow T flat workpiece 6 contact. The conveying runs extend in the present embodiment from the relative to the transport direction according to arrow T downstream guide rollers 4.2 and 4.4 to Zugmittelführungsrollen 7.1 and 7.2, which follow at a certain distance downstream on the arranged at the upstream end of the respective traction drive pulleys 4.1 and 4.3, which in turn are arranged at a certain distance from the conveying plane 3.

At the in Fig. 1 reproduced constellation are the pulleys 4.1 and 4.2 and the Zugmittelführungsrollen 7.1 of the first traction mechanism drive 1 'the pulleys 4.3 and 4.4 and the Zugmittelführungsrolle 7.2 of the second Traction drive 2 'directly opposite. This proves to be suitable in the event that the conveying conditions, as in Fig. 1 represented, are oriented horizontally.

It is understood that the two traction mechanism drives 1 'and 2' each have a plurality of said belt 5 and a corresponding number of pulleys 4.1 to 4.4 and Zugmittelführungsrollen 7.1 and 7.2 transverse to the transport direction according to arrow T between side cheeks 8.1 and 9.1 of two, in the further course even closer described carriage 8 and 9 are lined up.

As in Fig. 2 is shown, in the event of a lowering of the upstream ends of the traction mechanism drives 1 'and 2' of the second traction mechanism drive 2 'relative to the first traction mechanism drive 1' preferably in the transport direction according to arrow T. As in Fig. 3 shown, in contrast, in the event of an increase of the upstream ends of the traction mechanism drives 1 'and 2' of the second traction mechanism drive 2 'relative to the first traction mechanism drive 1' preferably opposite to the transport direction according to arrow T. In both cases, the displacement of the second traction mechanism drive 2 'relative to the first traction mechanism drive 1' in the respective preferred direction an improved running-in behavior of the device supplied flat workpieces against a merely inclined arrangement without corresponding displacement of the second traction mechanism drive 2 'relative to the first traction drive 1'.

In a preferred embodiment, the first conveyor - here in the form of the first traction mechanism drive 1 '- in and against the transport direction according to the arrow T slidably.

To realize the displaceability, the first traction mechanism drive 1 'is arranged on a first carriage 8 and the second traction mechanism drive 2' on a second carriage 9. Of the two carriages 8 and 9, only one of two side cheeks 8.1 and 9.1 can be seen in the figures. The slides 8 and 9 are supported by side walls, of which in turn only a side wall designated by 10 can be seen in the figures. The side walls 10 have slits 11 oriented in the transport direction, into which guide pins 12 provided on the carriages 8 and 9 engage. In an alternative embodiment, 12 guide rollers are provided instead of the guide pin, which are rotatably mounted on the carriage 8 and 9 are arranged.

In at least one of the side walls 10, a gear 13 is rotatably mounted between the two carriages 8 and 9. On a respective one of the two carriages 8 and 9, successive teeth of a first rack toothing 14 and a second rack toothing 15 are provided in or against the transport direction according to the arrow T, which teeth are in engagement with the toothed wheel 13. This results in an adjustment of one of the two slides 8 and 9 in a first direction visible to a simultaneous and similar adjustment of the other in a direction opposite to the first direction second direction. Here, the gear 13 is an adjusting wheel, on which the first traction mechanism drive 1 'and the second traction mechanism drive 2' roll simultaneously.

The two conveyors - here in the form of the first and second traction mechanism drive 1 'and 2' - are locked in jointly occupied different pivotal positions with respect to a transversely to the transport direction according to arrow T extending geometric axis 16. The geometric axis 16 is preferably located in the conveying plane 3 located between the two conveyors 1 and 2, and furthermore preferably in the region of an inlet into one downstream of the device following processing station, which is in the present embodiment as a pressing station 17.

To realize a locking of the two here as Zugmitteltriebe 1 'and 2' formed conveyor 1 and 2 in jointly occupied pivotal positions with respect to said geometric axis 16 at least one of the side walls is associated with a fixed support, not shown in the figures, which is a plane-parallel and to the Side walls 10 parallel portion which is broken by a concentric to the geometric axis 16 backdrop of longitudinal extent. At the at least one side wall 10 - which is associated with the support - an extension 10.1 is provided which extends into the region of the link 18 when the conveyor 1 and 2 occupy a certain working position - horizontally or inclined in one or the other direction - occupy. On the extension 10.1 of at least one side wall 10, for example, bolts 19 or rotatably mounted rollers are arranged, which engage in a certain working position of the conveyor 1 and 2 at a certain mutual distance in the link 18. Thus, the two conveyors 1 and 2 - here in the form of traction drives 1 'and 2' - adjustable to common pivotal positions. For locking in one of these pivotal positions, a sufficient frictional engagement is produced in the present example between said support and the extension 10.1, for example by means of a screw connection 20 which presses the projection 10.1 and the said support together.

To adapt to different thicknesses of the flat workpieces 6 different distances between the two conveyors 1 and 2 are adjustable. In the present embodiment, in which the conveyors 1 and 2 in the form of the traction mechanism drives 1 'and 2' are present, the distances between the conveyors 1 and 2 are determined by the distances of the delivery of the two traction mechanism drives 1 'and 2'. In this respect, the traction mechanism drives 1 'and 2' to adjust to different thicknesses of the flat workpieces 6 adjustably arranged Zugmittelführungsrollen, which determine the mutual distance of Fördertrume the traction mechanisms 1 'and 2'.

It is, as provided in the present embodiment, sufficient if only the Zugmittelführungsrollen are arranged to guide one of the two conveyor belt adjustable. Accordingly, the Zugmittelführungsrollen 7.2 and serving as Zugmittelführungsrollen pulleys 4.4 of the second traction mechanism drive 2 'are arranged adjustable.

For this purpose, a first pivot shaft 22 and a second pivot shaft 23 are freely rotatably mounted in the side cheeks 9.1 of the second carriage 9 and preferably pinned in each two Schwenkwellenendabschnitten, each with a two-armed bearing lever 21, the same at a first lever arm 21.1 thereof one end of the deflection and Zugmittelführungsrollen 4.4 supporting axle 4 and the Zugmittelführungsrollen 7.2 bearing axis 7 superimposed.

As especially the Fig. 4 Removable, is against the second lever arm 21.2 each an adjustment pin 24 is employed such that it actuates the bearing lever 21 in the sense of a Wegschwenkens of the first lever arm 21.1 of the conveyor belts 3, under the exercise of a force, against the action of a not shown here, the first Lever 21.1 attacking force accumulator, such as a compression spring.

The alignment pin 24 is guided in a mounted on the side wall 9.1 guide block 25 which is provided for this purpose with a corresponding hole, and in a corresponding bore in a folded flap 26 of the side wall 9.1. At one of the tab 26 facing the end portion of the Justagestiftes 24 a transverse to this oriented clamping plate 27 is attached to this. This carries a perpendicular to the adjustment pin 24 oriented axis 28, with respect to which a two-armed adjustment lever 29 is pivotable. With appropriate pivoting of the adjustment lever 29 - in the case of the arrangement according to Fig. 4 clockwise - presses this contact of a specially shaped here end of an arm of the adjustment lever 29 with the tab 26, the axis 28 and thus the clamping plate 27 against the action of a spring 30 away from the tab 26, so that the adjustment pin 24 is a pivoting of the Axis 4 bearing bearing lever 21 in the clockwise direction and the axis 7 bearing bearing lever 21 causes in the counterclockwise direction, with the deflection and Zugmittelführungsrollen 4.4 and 7.2 Zugmittelführungsrollen remove from the conveying plane 4.

With the adjusting means explained so far for adapting the device to different thicknesses of the flat workpieces 6, a specific adjustment to a specific thickness can be made very simply in such a way that a gap is created in the gap created by the adjustment lever 29 between the tab 26 and the clamping plate 27 this thickness corresponding part is clamped. For this purpose, a corresponding cut-to-size part 31 of one of the flat workpieces 6 to be transported is preferably used for this purpose.

For optimal transmission of actuating forces of the adjustment pin 24 on the bearing lever 21, a ball 32 is disposed between them, which is inserted into a respective caliper formed on the adjustment pin 24 and the second lever arm 21.2 of the bearing lever 21.

In that regard, the deflection and Zugmittelführungsrollen 4.4 and the Zugmittelführungsrollen 7.2 indirectly bearing bearing lever 21 are adjustable to different pivotal positions and the deflection and Zugmittelführungsrollen 4.4 and the Zugmittelführungsrollen 7.2 are arranged to adapt to different thicknesses of the flat workpieces 6 adjustable.

The present invention in the form of the two traction drives 1 'and 2' formed conveyor 1 and 2 form with their upstream ends an inlet mouth 33 with a muzzle 33.1 and a mouth base 33.2 and with their downstream ends a discharge mouth 34 with a mouth shell 34.1 and a mouth part 34.2.

As in Fig. 1 Recognizable, in the case of use of the device with horizontally oriented conveyors, the muzzle tops 33.1 and 34.1 are flush with the respectively associated mouth base 33.2 and 34.2. With appropriate adjustment of the conveyor 1 and 2, the respective mouth upper part 33.1 or 34.1 and / or the respective mouth base 33.2 or 34.2 adjustable between positions in which on the one hand the mouth base 33.2 or 34.2 protrudes beyond the mouth shell 33.1 or 34.1 and on the other hand Mauloberteil 33.1 or 34.1 protrudes beyond the mouth base 33.2 and 34.2.

In that regard, the geometry of the inlet mouth 33 - and also the outlet mouth 34 - with regard to a respective required pivot position - due to the outlet height in a device preceding processing station - optimized.

In Fig. 2 a first example of this is shown. In this case, the outlet of the flat workpieces 6 from a preceding processing station is at a lower level than the inlet to a downstream processing station - here the pressing station 17 -. The conveyors 1 and 2 - here the first and the second traction mechanism drive 1 'and 2' - are locked in a jointly occupied pivotal position, in which the conveyors 1 and 2 are pivoted with respect to the geometric axis 16 already set down. The geometry of the inlet mouth 33 is in this case optimized insofar as regards the pivotal position, as the mouth base part 33.2 projects beyond the mouth upper part 33.1. From a previous processing station on a below the level of the geometric axis 16 - around which the conveyor 1 and 2 are jointly pivotal - ejected flat workpieces 6 can be seen in this constellation unhindered and intended between the Fördertrume the two traction drives 1 'and 2'.

For the discharge mouth 34 it follows that the mouth upper part 34.1 projects beyond the mouth base 34.2, and apart from the inclined arrangement of the conveyors 1 and 2, the transfer ratios of these to the formed in the present example as a pressing station 17 subsequent processing station by the shifted Mutual position of the conveyor 1 and 2 insofar only insignificantly as to achieve a supernatant of the mouth part 33.2 of the inlet mouth 33 by a certain amount on the mouth 33.1 addition, in the preferred embodiment for forcibly opposite displacement of both conveyors, the mouth shell 34.1 and the mouth base 34.2 only to the Half of the said amount must be postponed.

In Fig. 3 a constellation is shown for the case that a preceding processing station ejects flat workpieces 6 at a level which is higher than the geometric axis 16.

The conveyors 1 and 2 are thus pivoted upwardly with respect to the geometric axis 16. This results in an optimized geometry of the inlet mouth 33 by such an adjustment of the two traction mechanism drives 1 'and 2', that the mouth upper part 33.1 of the inlet mouth 33 projects beyond the mouth base 33.2.

From a previous processing station on a above the level of the geometric axis 16 ejected workpieces 6 can also be seen in this constellation unhindered and intended between the two traction drives 1 'and 2'. For the outlet mouth 34 applies in the same way in connection with Fig. 2 Said.

The Fig. 5 is opposite the FIGS. 1 to 3 supplemented by details and can be seen in this respect a locking device 35, by means of which the two, the traction mechanism 1 'and 2' carrying carriage 8 and 9 relative to these supporting side walls 10 in a selected carriage position can be locked, and drive means for operating the traction mechanism 1 'and 2 '.

Said drive means comprise a double pulley 36 concentrically arranged with respect to the geometric axis 16, which is driven by an operationally rotating wheel 38 of the here following press station, downstream processing station by means of an endless belt 37 and is wrapped by another endless belt 39. This forms an upper run 39.1, which, starting from the double pulley 36 with the belt inside a Deflection pulley 40, then with the outside of the belt, a pulley 4.3 driving the pulleys 4.3 ', then with the belt inside a pulley 4.1 driving pulley 4.1', then with the belt outside a pulley 41 and then wraps around the belt inside another pulley 42, from which a lower run 39.2 of the belt 39 to the double pulley 36 runs back. The thus-designed belt drive is preferably a toothed belt drive with an internally and externally toothed endless toothed belt.

In this case, the double pulley 36 runs counterclockwise.

The conveyors 1 and 2 are in the embodiment set forth so far, although formed as a traction mechanism drives 1 'and 2', the delivery of which extend otherwise along the entire transport path. In the context of the invention, however, are also this alternative trained conveyor such. B. traction drives each having more than one along the transport path extending conveyor belt or as a roller conveyor or as combinations of at least one roller conveyor track and at least one traction means conveyor formed conveyor.

LIST OF REFERENCE NUMBERS

1

first promoter

1'

first traction drive

2

second conveyor

2 '

second traction drive

3

conveying plane

4

axis

4.1

idler pulley

4.1 '

pulley

4.2

idler pulley

4.3

idler pulley

4.3 '

pulley

4.4

Deflection pulley / traction mechanism guide pulley

5

belt

6

flat workpiece

7

axis

7.1; 7.2

transmission means

8th

first sled

8.1

Sidewall of the first carriage 8

9

second sled

9.1

Sidewall of the second carriage 9

10

Side wall

10.1

Extension of the side wall 10

11

slot

12

guide pins

13

gear

14

first rack toothing

15

second rack toothing

16

geometric axis

17

Pressing station

18

scenery

19

bolt

20

screw

21

bearing lever

21.1

first lever arm of the lever 21st

21.2

second lever arm of the lever 21st

22

first pivot shaft

23

second pivot shaft

24

Justagestift

25

guide block

26

flap

27

clamp

28

axis

29

adjustment lever

30

feather

31

Part of a flat workpiece

32

Bullet

33

inlet opening

33.1

Mouth top of the inlet mouth

33.2

Mouth part of the inlet mouth

34

outlet mouth

34.1

Mouth top of the outlet mouth

34.2

Mouth part of the outlet mouth

35

locking device

36

pulley

37

belt

38

wheel

39

belt

39.1

upper run of the belt 39

39.2

lower strand of the belt 39

40

deflection plate

41

deflection plate

42

deflection plate

T

in the direction of transport pointing arrow

Claims (10)

1. A device for transporting flat workpieces (6) in a transport direction (T) comprising:

   - a first conveyor (1) for making contact with a first surface of a respective one of the workpieces (6); and

   - a second conveyor (2) for making contact with a second surface, lying opposite the first surface, of the respective one of the workpieces (6); and

   - an inlet mouth (33) having a mouth upper part (33.1) and a mouth lower part (33.2) formed with said first and second conveyer (1, 2),

   characterized by a geometry of the inlet mouth (33) which can be changed such that in a first case said mouth lower part (33.2) protrudes beyond said mouth upper part (33.1) and, in a second case, said mouth upper part (33.1) protrudes beyond said mouth lower part (33.2).
2. The device according to claim 1, characterized in that said first conveyor (1) can be displaced in a first direction and, at the same time, said second conveyor (2) can be displaced into an opposite second direction.
3. The device according to claim 2, characterized by an adjusting wheel (13) on which said first and second conveyors (1 and 2) roll simultaneously when the said first and second conveyors are displaced.
4. The device according to claim 1, characterized in that said first and second conveyors (1 and 2) can be locked in jointly assumed different pivoting positions, with regard to a geometric axis (16) which extends transversely with respect to the transport direction (T).
5. The device according to claim 4, characterized in that said geometric axis (16) lies in a conveying plane (3) which is situated between said first and second conveyors (1 and 2).
6. The device according to claim 1, characterized in that for adaptation to different thicknesses of the flat workpieces (6) different spacings between said first and second conveyors (1 and 2) can be set.
7. The device according to claim 1, characterized in that said first and second conveyors (1 and 2) are formed by a first and a second flexible drive (1' and 2').
8. The device according to claim 7, characterized in that for adaptation to different thicknesses of the flat workpieces (6), said first and second flexible drives (1', 2') contain adjustably disposed flexible drive guide rollers (4.4, 7.2).
9. The device according to claim 8, characterized by bearing levers (21) carrying said flexible drive guide rollers (4.4, 7.2) can be set to different pivoting positions.
10. The device according to at least one of the claims 1 to 9 characterized in that in a third case said mouth upper part (33.1) and said mouth lower part (33.2) of said inlet mouth (33) are flush with one another.

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