DE19515398C2 - Front edge separator - Google Patents

Description

The invention relates to a sheet leading edge separators with several spaced apart neten suction cups for the cyclical conveyance of dandruff staggered bow, the suction cups by coupling gear driven movements on a closed Run the web in the conveying direction of the sheets and back and the suction cups in two work cycles send movement cycle offset by one work cycle one after the other in the area of the stack leading edge long, each coupling gear a tra the sucker Gende coupling, which of one around an axis rotatable crank is drivable and the Suction cups double suction cups with one suction surface on each The top and bottom are and the bottom suction surface the top sheet of the sheet stack detects and lifts and in the raised state to the upper suction surface of the other arranged next to it Double suction cup for further transport in the conveying direction passes.

Front edge separator of the type mentioned are known from DE-OS 42 00 393. Especially, if a large number of suction cups and thus also coupling  are arranged side by side, it is expensive to drive all coupling gears.

Furthermore, an arch edge separator with a cop pel gear driven double suction cups from DE-OS 42 20 399 known.

The object of the invention is a sheet leading edges to create separators of the type mentioned, the thanks to a simply constructed space-saving type was driven.

This object is achieved in that all cranks of the same work cycle via rotary transmission means from a common drive shaft to a turning cycle with two work cycles are rotatably drivable, each drive shaft from a gearbox with irregular rotation is drivable during a work cycle and the Gearbox form a primary gearbox with constant ter speed is drivable, which is a transmission the other gear by one work cycle phase hurries.

With this training, not everyone needs one individual crank mechanism to transmit its own motion its drive but it can be done with just two drive  waves and simple rotation transmission means of the An drive of the sheet leading edge separator who performed the.

The use of drive shafts is beyond that space-saving.

Furthermore, there is only a single motion drive for the entire front edge separator required. This can also be particularly simple, since only constant rotation is required. The the Gearboxes forming a gearbox can be a Be a unit.

It is particularly cost-effective if the gearbox Drive shafts are identical gears.

The transmission means can e.g. B. gear, drives or Be chain drives.

If the rotation transmission means toothed belt drives, so can use long transmission paths in a space-saving manner from the drive shafts to the coupling gears be bridged. At the same time, it is extremely precise Transfer of motion as the transfer elements motion transmission largely without tolerance  to lead.

A simple, low-component construction is given if a Timing belt drive firmly on one of the drive shafts arranged drive gear into which an end  loose toothed belt engages with a non-rotatable the crank connected output gear is guided.

A further saving of components and installation space is achieved when several cranks of the same work cycle are non-rotatably connected to an output gear because thus only one toothed belt drive for several Coupling gear is required.

For this purpose, the driven gear on a rotatable gela Output shaft can be arranged in a rotationally fixed manner, with the one or more cranks are firmly connected.

In a preferred embodiment, the coupling gears Articulated quadrilateral gear. The coupling of the cop pel gearbox at one of the pivot point of the crank distant point with one end of a swing arm be tied, the other end of which is fixed by one Swivel axis is pivotally mounted.

Is rational and therefore inexpensive to manufacture, if the link gears are the same link gears.

Are the wings of the coupling gear on one common pivot axis pivotally mounted, so results a simple space-saving construction.  

This applies in the same way if the downforce gears arranged to rotate about coaxial axes of rotation are.

An embodiment of the invention is in the drawing shown and will be described in more detail below ben. Show it

Fig. 1 is a schematic perspective view of egg nes leading edge separator

Fig. 2 is a schematic side view of the Bo gent Renner of FIG. 1

Fig. 3a - 3f, the movement phases of the double suckers of the sheet leading edge separator according to Fig. 1.

The sheet leading edge separator shown has a drive shaft 1 by z. B. an electric motor with constant drive speed drivable gear 2 , which can be a so-called locking gear. In the trained as a unit before gearbox, the rotary motion of the drive shaft 1 is transmitted to a first and an identical second gear 16 and 17 in such a way that the movement of the second gear 17 for moving the first Ge gear 16 is offset by one working cycle.

The gear 16 and 17 can be designed as a wheel cam gear.

Through the superimposed gear 16 and 17 , the constant input rotary motion of the drive shaft 1 of the primary gear 2 is implemented in non-uniform rotary movements of the drive shafts 14 and 15 driven by the gear 16 and 17 .

The parallel to each other Antriebswel len 14 and 15 are rotatably supported with their ends facing away from the gears 16 and 17 in bearings in the machine frame 25 .

The drive shaft 15 carries in its middle area fixedly disposed a driving gear 18, while the on drive shaft 14 in their edge regions in each case an on drive gear 18 'rotatably carries. Via toothed belts 19 and 19 ', the rotational movement of the drive gearwheels 18 and 18 ' is transmitted to output gearwheels 20 and 20 'which are fixedly connected to rotatably mounted output shafts 21 and 21 '.

The output shafts 21 and 21 'are arranged coaxially to each other. Tooth pitches of the drive gears 18 and 18 'and the output gears 20 and 20 ' are each the same, so that the output shafts 21 and 21 'are driven to the same rotational movement.

On the output shafts 21 'of the outer output gears 20 ' a radially projecting crank 5 of coupling gears 3 is fixedly arranged, while the drive shaft 21 from each side of its output gear 20 has the same crank 5 .

Couplings 4 of the coupling gears 3 , which consist of two coupling levers 26 and 27, are articulated via articulation points 24 on the free ends of the cranks 5 .

The coupling levers 26 extend from the articulation point 24 approximately horizontally in the direction of a sheet stack 12 and each carry a double suction device 9 or 9 'at their free ends.

The coupling levers 27 extend approximately vertically downward from the articulation point 24 and are each articulated with their free end to a free end of a rocker 7 of the coupling gear 3 .

This rocker 7 is in turn mounted with its other end pivotable about a pivot axis 22 . The pivot axes 22 of all coupling gear 3 are arranged coaxially to each other.

The double suction devices 9 and 9 'have upper suction surfaces 10 on their upper side and lower suction surfaces 11 on their underside. In each case a coupling gear 3 from the drive shaft 21 is a coupling gear 3 from the drive shafts 21 'assigned that their double suction cups 9 and 9 ' move in the conveying direction 13 side by side arranged vertical planes of movement.

The output shaft 21 is driven offset by one work cycle in relation to the output shafts 21 '. This leads to the fact that within a two work cycles be contained motion cycle of the double suction cups 9 and 9 'first the driven by the output shaft 21 in neren double suction cups 9 with their lower suction surfaces 11 capture and raise the top sheet 28 of the sheet stack 12 .

In the raised state, the upper suction surfaces 10 of the inner double suction device 9 come into a plane in which there is also a bow 28 'carrying lower suction surfaces 11 of the outer double suction device 9 ' driven by the output shaft 21 '. This sheet 28 'is now taken over by the upper suction surfaces 10 of the double suction cups 9 .

The double suction cups 9 'already carrying a sheet 28 ''on their upper suction surfaces 10 now move in the conveying direction 13 to a take-over (not shown) and transfer this sheet 28 ''.

Simultaneously driving the double suckers 9 on the prede ren region of the sheet stack 12 upward, the double sucker such that 9 'then move under the teats of the double-9 lifted sheet 28 through the sheet stack 12, and a further sheet 28' can detect ''.

', While the double sucker 9, the beginning of movement of the double sucker 9, the described Anhubbewegung initially described for the double suckers 9' perform now perform the double suckers. 9

Reference list

1

drive shaft

2nd

Primary gearbox

3rd

Coupling gear

4th

Paddock

5

crank

6

axis

7

Swingarm

9

,

9

'' Double suction cup

10th

Suction surface

11

Suction surface

12th

Sheet stack

13

Direction of conveyance

14

drive shaft

15

drive shaft

16

transmission

17th

transmission

18th

,

18th

'' Drive gear

19th

,

19th

'' Timing belt

20th

,

20th

'' Output gear

21

,

21

'Output shaft

22

Swivel axis

23

Axis of rotation

24th

Pivot point

25th

Machine frame

26

Coupling lever

27

Coupling lever

28

,

28

',

28

'',

28

'''Bow

Claims (11)

1. Sheet leading edge separator with a plurality of suction cups arranged next to one another for the cyclical conveyance of scale-like staggered sheets, the suction cups being driven by coupling gears performing movements on a closed path in the conveying direction of the sheets and back and thereby performing the suction cups in one movement cycle comprising two work cycles Ar beitstakt successively arrive in the area of the staple leading edge, each coupling gear having a suction pad coupling which can be driven by a crank which can be rotated about an axis and the suction cups double suction cups each having a suction surface on its top and bottom are and the lower suction surface of a double suction device detects and raises the uppermost sheet of the sheet stack and transfers them in the raised state to the upper suction surface of the adjoining th other double suction device for further transport in the direction of conveyance, characterized in that all cranks ( 5 ) same Ar beitstaktes via rotary transmission means each of a common drive shaft ( 14 , 15 ) are rotatably drivable to a two-cycle rotation cycle, each drive shaft ( 14 , 15 ) by a gear ( 16 , 17 ) with non-uniform rotary motion during a work cycle is drivable and the Ge gearboxes ( 16 , 17 ) form a primary gear ( 2 ) which can be driven at a constant speed, the one gear ( 16 ) lagging the other gear ( 17 ) by an operating cycle. 2. sheet leading edge separator according to claim 1, characterized in that the Ge drives ( 16 , 17 ) of the drive shafts ( 14 , 15 ) are identical gears. 3. Front sheet separator according to one of the preceding the claims, characterized net that the rotation transmission toothed belt drives are. 4. sheet leading edge separator according to claim 3, characterized in that a toothed belt drive on one of the drive shafts ( 14 , 15 ) fixedly arranged drive gear ( 18 , 18 ') into which an endless toothed belt ( 19 , 19 ') engages, the From a non-rotatably connected to the crank ( 5 ) from drive gear ( 20 , 20 ') is guided. 5. sheet leading edge separator according to claim 4, characterized in that several cranks ( 5 ) of the same working cycle with a drive gear from ( 20 , 20 ') are rotatably connected. 6. sheet leading edge separator according to one of claims 4 and 5, characterized in that the output gear ( 20 , 20 ') on a rotatably gela gered output shaft ( 21 , 21 ') is rotatably arranged, with which one or more cranks are firmly connected. 7. sheet leading edge separator according to one of the preceding claims, characterized in that the coupling gear ( 3 ) are quadrangular drives. 8. sheet leading edge separator according to claim 4, characterized in that the coupling ( 4 ) of the coupling gear ( 3 ) at a point of articulation ( 24 ) of the crank ( 5 ) remote point with one end of a rocker ( 7 ) is connected, the other End is fixedly pivoted about a pivot axis ( 22 ). 9. sheet leading edge separator according to one of the preceding claims, characterized in that the coupling gear ( 3 ) are identical Koppelge gear. 10. sheet leading edge separator according to claim 9, characterized in that the rockers ( 7 ) of the coupling gear ( 3 ) are pivotally mounted on a common pivot axis ( 22 ). 11. Bow leading edge separator according to claim 9, characterized in that the drive gears ( 20 , 20 ') are arranged rotatably about coaxial axes of rotation ( 23 ).