阅读说明：本技术 具有用于输送承印材料页张的输送设备的印刷机 (Printing machine with a transport device for transporting a sheet of printing material ) 是由 A·米勒 于 2019-06-04 设计创作，主要内容包括：本发明涉及一种印刷机,具有输送设备,用于将页张沿着输送设备输送路径输送经过印刷机,还具有印刷页张的至少一个印刷站,输送设备包括承载页张的多个平坦的输送台,输送路径包括第一区段和第二区段,第一区段在印刷站之前和/或之后延伸,第二区段沿着至少印刷站延伸,输送设备包括第一驱动器,用于驱动第一区段上的输送台,包括第二驱动器,用于驱动第二区段上的输送台,输送台分别包括至少一个驱动滚子或者不同于驱动滚子的辊动体或滑动体,第二驱动器包括驱动主轴,驱动主轴驱动驱动滚子或辊动体或滑动体。根据本发明的印刷机以有利的方式使由承印材料所构成的页张以高均匀性运动经过印刷站的作用区域并由此生产高品质印刷品。(The invention relates to a printing press having a transport device for transporting sheets through the printing press along a transport path of the transport device, and having at least one printing station for printing the sheets, the transport device comprising a plurality of flat transport platforms carrying the sheets, the transport path comprising a first section extending before and/or after the printing station and a second section extending along at least the printing station, the transport device comprising a first drive for driving the transport platforms on the first section, comprising a second drive for driving the transport platforms on the second section, the transport platforms each comprising at least one drive roller or a roller body or a slide body different from the drive roller, the second drive comprising a drive spindle for driving the drive roller or the roller body or the slide body. The printing press according to the invention advantageously moves the sheet of printing material through the active region of the printing station with high uniformity and thus produces high-quality printed products.)

1. a printing press having a transport device for transporting sheets (2) of a printing material through the printing press (1) along a transport path (8) of the transport device (6), and having at least one printing station (3) for printing sheets, wherein:

The conveying device comprises a plurality of flat conveying tables (10) for carrying the sheets,

-the transport path comprises a first section (13) and a second section (15),

-the first section extends before and/or after the printing station,

-the second section extends along at least the printing station,

-the transport device comprises a first drive (14) for driving the transport table on the first section,

-the transport device comprises a second drive (16) for driving the transport table on the second section,

It is characterized in that the preparation method is characterized in that,

The conveying table (10) comprises at least one drive roller (17) or a roller body (17 ') or a sliding body (17') different from the drive roller, respectively, and

the second drive (16) comprises a drive spindle (16,18) which drives the drive roller or the roller body or the sliding body.

2. The printing press as set forth in claim 1,

It is characterized in that the preparation method is characterized in that,

The conveying table (10) on the second section (15) can be decoupled from the first drive (14) or already decoupled from the first drive.

3. The printing press as set forth in claim 2,

It is characterized in that the preparation method is characterized in that,

The conveying table (10) on the first section (13) can be decoupled from the second drive (16) or can already be decoupled from the second drive.

4. A printing press according to any one of the preceding claims,

It is characterized in that the preparation method is characterized in that,

The conveying tables (10) each comprise at least one driver (19) and/or coupling element (19), and

The first drive (14) comprises a drive belt (14) or a drive chain (14) which drives the driver or the coupling element.

5. The printing press as set forth in claim 4,

It is characterized in that the preparation method is characterized in that,

In order to decouple the transport table (10) from the drive belt (14), the driver (19) is connected to the drive belt by means of at least one spring (21).

6. A printing press according to any one of the preceding claims,

It is characterized in that the preparation method is characterized in that,

the rotational axis (18a) of the drive spindle (18) is arranged parallel to the second section (15) of the transport path (8).

7. A printing press according to any one of the preceding claims,

It is characterized in that the preparation method is characterized in that,

The drive spindle (18) is supported by at least one support roller (25).

8. a printing press according to any one of the preceding claims,

It is characterized in that the preparation method is characterized in that,

a further drive spindle (26) arranged parallel to the drive spindle (18) is provided for driving the transport table (10) on the second section (15).

9. A printing press according to any one of the preceding claims,

It is characterized in that the preparation method is characterized in that,

The conveying tables (10) are each formed from a plurality of flat conveying sections (11).

10. a printing press having movable flat transport sections for sheets (2) of printing material to be placed thereon has at least one drive roller (17) or a roller body (17 ') or a slide body (17') different from a drive roller on each transport section (11), and has a drive spindle (16,18) for driving the drive roller or roller body or slide body and thereby for driving the transport section through the printing press (1) along at least one section (15) of a transport path (8) associated with an ink printing station (3).

Technical Field

The invention relates to a printing press having the features of the preamble of claim 1 and to a printing press having the features of claim 10.

The technical field to which the invention pertains is the graphics industry and in particular the field of transporting sheet-like printing materials, preferably made of paper, cardboard, kraft paper, plastic or composite materials, in the graphics industry.

Background

In order to convey sheets of printing material (for example, through a printing press), various conveying systems are known from the prior art: such as conveyor rollers, conveyor belts or so-called conveyor tables (conveyor tables) or conveyor trays.

EP3067211a1 discloses a printing press with a tray-like transport system which comprises a plurality of rotary transport tables for sheets of printing material. This system also includes two drivers: an outer drive with a chain and an inner drive with a toothed belt (Zahnriemen) arranged in the region of the printing station. These two drives can lead to non-uniformity in the movement of the sheets.

WO2012/108870a1 discloses a device for conveying sheets of printing material, which has, for example, an endless circulating conveyor belt (endlosen Band) which drives a flat conveying section (transport segment) by means of rollers or pins. In this case, the sheets of printing material can be placed on several sections and held by means of a vacuum. Such a drive belt can lead to non-uniformities in the movement of the sheet.

thus, in the prior art, the following problems may occur: that is, conventional drive systems do not have the uniformity required to produce high quality prints.

Disclosure of Invention

the object of the present invention is therefore to provide an improved solution in relation to the prior art, which in particular enables sheets of printing material to be moved with high uniformity at least over the active region of the printing station and thus contributes to the production of high-quality printed products.

According to the invention, this object is achieved by a device according to claim 1. Advantageous and therefore preferred developments of the invention emerge from the dependent claims as well as from the description and the drawings.

"sheet of printing material" refers to a flat substrate or object which is not printed and is intended for printing or which is printed and is intended for further printing. "sheet of printing material" means in particular a flat substrate or article which is flexible or rigid (for example a sheet), is substantially made of material paper, cardboard, kraft paper, corrugated paper, plastic or metal (in particular plastic film or metal foil), or is in the form of a label (in particular on a carrier) which is substantially made of material paper or plastic.

The printing press according to the invention has a transport device for transporting sheets of printing material through the printing press along a transport path of the transport device and at least one printing station for printing the sheets, wherein the transport device comprises a plurality of flat transport tables for carrying the sheets, the transport path comprises a first section extending before and/or after the printing station and a second section extending at least along the printing station, the transport device comprises a first drive, for driving the transport table on the first section, the transport device comprising a second drive for driving the transport table on the second section, characterized in that the transport tables each comprise at least one drive roller or a roller body or a sliding body (different from the drive roller), and the second drive comprises a drive spindle (antitriebspindel) which drives the drive rollers or roller bodies or sliding bodies.

A further printing press according to the invention is a printing press having a movable, flat transport section for receiving a sheet of printing material, which printing press has at least one drive roller or a roller or slide body (different from the drive roller) on each transport section, and a drive spindle for driving the drive rollers or roller or slide bodies and thus the transport sections along at least one section of the transport path (associated with the ink printing station) past the printing press.

The printing press provided according to the invention advantageously makes it possible to move the sheet of printing material with high uniformity at least over the active region of the printing station (and optionally over the active region of the upstream pre-coating station, the active region of the downstream varnishing station and/or the active region of the downstream drying/hardening station) and thus to produce high-quality prints.

In addition, the conveying system equipped with the conveying table or the conveying section has high modularityAnd can be adapted to different printers (or their configurations or lengths). Finally, these tables or sections enable a smooth transport at least in the active area of the printing station.

According to the invention, one or more drive spindles are used in combination with drive rollers (or alternatively other roller bodies or sliding bodies/sliding blocks), so that the transport tables and thus the sheets can be guided through the printing station with high precision and in particular uniformly and with high precision. These drive rollers can preferably be embodied as convex spheres (ballig). The roller bodies other than the drive rollers may preferably be designed as spheres (Kugeln).

furthermore, a rotary encoder (Drehgeber) can be provided on the drive spindle, which rotary encoder measures the rotational speed and is connected to a computer, which computer, in the event of a non-uniformity of the measured rotational speed, adapts the control (device), in particular the timing (Taktung), for producing the printing points in such a way that a high-precision printing is possible and in particular the occurrence of cross-bars (quadraturefen) in the printed image is avoided.

The drive spindle may be driven indirectly through one or more gears or directly by a motor. The motor may also be integrated into the spindle.

Instead of one drive spindle, two or more drive spindles which are arranged one behind the other in the conveying direction can also be provided.

these conveying tables or sections can be made of aluminum, for example by milling.

The first driver and the second driver may be mechanically coupled to each other. Alternatively, the first and second drives may each comprise a synchronous motor.

A preferred development of the invention can be characterized in that the transport tables on the second section can be decoupled or already decoupled from the first drive. In this way, decoupling is achieved, in particular, from disturbances caused by the first drive, as a result of which printing with high precision is possible.

A preferred development of the invention can be characterized in that the transport tables on the first section can be decoupled or already decoupled from the second drive. In this way, the transport tables can be driven by less precise drive technology next to the printing stations and thus cost-effective.

A preferred development of the invention can be characterized in that the transport tables each comprise at least one catch and/or coupling element, and the first drive comprises a drive belt or drive chain which drives the catch or coupling element.

a preferred development of the invention can be characterized in that, for decoupling the conveyor tables from the drive belt, the drivers are connected to the drive belt by means of at least one spring each. Alternatively or additionally, at least one damping element may be provided. Alternatively or in addition to the spring, a damper may be provided. Alternatively or in addition to the spring and/or the damper, a clutch/coupling device (kuppleng) may be provided.

A preferred refinement of the invention may be characterized in that the axis of rotation of the drive spindle is arranged parallel to the second section of the transport path.

A preferred development of the invention can be characterized in that the drive spindle is supported by at least one support roller.

A preferred development of the invention can be characterized in that a further drive spindle arranged parallel to the drive spindle is provided for driving the transport table on the second section.

A preferred development of the invention can be characterized in that the conveying tables are each formed from a plurality of flat conveying sections.

The invention, the further development of the invention and the features of the exemplary embodiments of the invention in any combination with one another also form advantageous further developments of the invention. The improvements of the invention may also have individual features or combinations of features disclosed in the above "technical field", "background" and "summary of the invention" paragraphs.

Drawings

The invention and its preferred modifications will be further described based on preferred embodiments with reference to the accompanying drawings. Mutually corresponding features are denoted by the same reference numerals in the figures.

fig. 1 to 11: a preferred embodiment of a printing press according to the invention and a view of its details are shown.

Detailed Description

Fig. 1 shows a side view of a preferred embodiment of a printing press according to the invention.

Fig. 1 shows a printing press 1 for transporting and printing sheets 2 of a printing material. The sheets 2 are transported from the feeder 4 through the printing press 1 to the collector 5. For printing the sheets 2, the sheets 2 are conveyed through a printing station 3 having a plurality of printing heads 3a-3 d. In this case, the sheets 2 can be printed, for example, in a four-color printing process.

Fig. 1 also shows a transport device 6 for the sheets 2, which transport device 6 transports the sheets 2 in a transport direction 7 on a transport path 8 through the printing press 1 and along the printing station 3. The conveying device 6 has conveying tables 10, which conveying tables 10 can each be formed by one conveying section 11 or by a plurality of conveying sections 11. The conveying sections 11 form a revolving chain. Between these sections 11 there may be a gap 12, for example, of a few tenths of a millimeter in width. In the exemplary embodiment shown, each conveying table 10 is formed by three conveying sections 11 which are moved one behind the other.

The first section 13 can be seen in fig. 1. In the first section 13, the sheets 2 are guided outside the printing station 3. The first section 13 has a first drive 14 which preferably comprises a toothed belt. The first drive 14 is clearly visible in fig. 2 and 3 and in fig. 8 and 9 (here as a toothed belt 20). One toothed belt or two or more parallel toothed belts may be provided. Instead of the toothed belt, a conveyor chain, a conveyor belt or a conveyor rope can also be used.

The transport device 6 also has a second section 15, in which second section 15 the sheets 2 are guided past the printing stations 3 (or their printing heads 3 a-d). In other words: the second section 15 is assigned to the printing station 3. The driving of the segments 11 on the second section 15 is performed by a second drive 16, preferably comprising a drive spindle 16. Such a drive spindle 16 is also clearly visible in the subsequent fig. 2 to 11 (here indicated by reference numeral 18).

For driving, each segment 11 has at least one drive roller 17. Instead of the drive rollers 17, other roller bodies 17 '(e.g. balls) or sliding bodies 17' (e.g. sliding blocks) may be provided. The drive spindle 16 executes a uniform rotational movement, so that the section 11 carried along by the drive spindle 16 and thus driven executes a uniform movement in the conveying direction 7. It can also be provided that a plurality of segments 11 are coupled and have a common drive roller/roller body/sliding body.

Fig. 2 shows a cross-sectional view of a preferred embodiment of the printing press 1 according to the invention according to fig. 1.

In the sectional view shown in fig. 2, the drive spindle 18 is shown in the center. The drive spindle 18 rotates about its axis of rotation 18a at a uniform rotational speed.

The sheet 2 of printing material is placed on the surface of the transport section 11. The sheets 2 can be held by suction air. For this purpose, corresponding suction boxes 27 are provided, which suction boxes 27 are connected to the suction openings 28 and their suction openings 29 facing the sheets 2. As shown in fig. 2, the retention of the sheets 2 at the respective transverse (lateral) edges of the sheet can be performed by suction air. These suction boxes 27 can be adjusted in the transverse (lateral) direction for adjustment to different sheet sizes. The suction strength can also be set (for example in the case of different grammage).

The guidance of these conveyor segments 11 can take place by means of guide rails 23 and guide rollers 24. A guide device 22 (or guide) can be provided for this purpose. The drive spindle 18 may preferably be received in a guide 22.

fig. 2 also shows two toothed belts 14, which toothed belts 14 drive respective followers 19 (or coupling pieces 19) of the conveying sections 11. In this case, the driver elements 19 are received in a springing manner, as can be seen clearly in fig. 3. The toothed belts 14 transport the segments 11 along the shown revolving guide track 23. The guide rollers 24 define the movement of the segments 11 along the guide track 23 precisely and without play. In the regions directly in front of, directly behind and below the print heads 3, the segments 11 make full use of the elasticity between the toothed belts 14 and the segments 11 to enable movement by the drive spindles 18 in synchronism with high accuracy and uniformity to the adjacent segments 11. In this way, interfering formation of the cross-bars during printing can advantageously be avoided. In addition to this, inhomogeneities or disturbances caused by the movement of the segments 11 outside the second region 15 are advantageously not transmitted to the segments 11 (or their movement) inside the second region 15.

fig. 3 shows a detailed view of a preferred embodiment of a printing press according to the invention (for example according to fig. 1).

The drive spindle 18 is again clearly shown in fig. 3. It can also be seen that the driver 19 of each segment 11 is supported by the toothed belt 14 (or 20) via a spring 21. The gap 12 between these sections 11 can also be seen in fig. 3.

The drive spindle 18 has two active surfaces 18 b. The drive rollers 17 roll on the action surfaces 18b or are driven in the conveying direction 8 by contact with the action surfaces 18 b. Fig. 3 also shows these guide rollers 24.

Fig. 4 shows a cross-sectional view of a preferred embodiment of the printing press according to the invention according to fig. 1 or 3.

in fig. 4 is shown: how a drive spindle 18 with a predetermined length can be supported and thus the drive accuracy can be improved. For this purpose supporting rollers 25 are used. One of the three support rollers 25 shown is resiliently supported 25.

fig. 5 shows a detailed view of a preferred embodiment of the printing press according to the invention according to fig. 1 or 3.

As can be seen in fig. 5, these supporting rollers 25 each have a length l which is greater than the pitch s shown for the drive spindle 18. In this way, the drive spindle 18 is always kept in contact with the support rollers 25 with its outer surface.

Fig. 6 shows a side view (partial view) of a preferred embodiment of the printing press according to the invention according to fig. 1 or 3.

Fig. 7 shows a top view (partial view) of a preferred embodiment of the printing press according to the invention according to fig. 1 or 3.

shown in fig. 6 and 7 are: how the drive spindle 18 can be synchronized with the toothed belts 14 (or 20). A drive 33, such as an electric motor, drives the drive spindle 18 via a drive shaft 34 and the worm drive 30. The second gear 32 is driven by a first gear 31 arranged on a drive shaft 34. The toothed belt shaft 35 on which the second gear 32 is arranged drives the two toothed belts 14 (or 20). Here, the toothed belt shaft 35 synchronizes the two toothed belts 14 (or 20). The pitch s (or spindle pitch) is advantageously designed such that the resulting feed of the segments 11 is synchronized with the feed of the toothed belts 14.

Fig. 8 shows a cross-sectional view of another preferred embodiment of a printing press according to the invention.

an embodiment of the present invention having two drive spindles is shown in fig. 8. For this purpose, in addition to the above-mentioned drive spindle 18, a further drive spindle 26 is provided. These two drive spindles can each be located in a transverse (lateral) position with reference to the conveying direction 7. In this embodiment, the supporting rollers 25 may be provided as well. The conveying sections 11 are now connected to each drive spindle by one drive roller 17 of at least two drive rollers 17.

Fig. 9 shows a top view (partial view) of a preferred embodiment of the printing press according to the invention according to fig. 8.

The drive for the embodiment with two drive spindles is shown in fig. 9. It can be seen that one of the two drive spindles can be driven directly by a drive 33 and the other of the two drive spindles can be driven (or synchronized), for example by a timing belt 37. The drive train also has a bevel gear 36. The toothed belts 20 can be synchronized with the drive of the drive spindles 18 and 26 by means of the two bevel gears 36 and the gear pair 38 connected downstream.

Fig. 10 shows a side view (partial view) of a preferred embodiment of the printing press according to the invention according to fig. 8.

Fig. 10 shows the drive 33, the bevel gears 36 and the toothed belt 20 which is synchronized with the drive spindle 18 by means of these bevel gears 36.

Fig. 11 shows a side view (partial view) of another preferred embodiment of a printing press according to the invention.

The interaction of the drive spindle 18 (or its surface) with the support rollers 25 is shown in detail in fig. 11. It is also shown that the drive bearing 17a and the counter spring bearing 17b roll on these active surfaces 18 b. The two bearings are preferably arranged on the same conveying section 11. Here, these drive bearings 17a correspond to the drive rollers 17. The insertion of the corresponding bearing 17b of each new section 11 that is inserted into the drive spindle 18 takes place simultaneously with the (bearing) insertion of the section 11 that rolls out on the drive spindle 18, so that no interference occurs with the drive spindle 18 as a whole or as little interference as possible with the drive spindle 18 occurs. For this purpose, the roll-in slope β 1 and the roll-out slope β 2 of the active surfaces 18b are provided. Since the angular position of these corresponding bearings 17b is always the same, the roll-in slope β 1 and the roll-out slope β 2 are defined angularly offset from each other. In the drawing, rolling-in is shown on the left and rolling-out on the right by way of example.

In order to guide these drive rollers 17 as gently as possible onto the active surface 18b of the drive spindle 18, a start gradient α is provided. The start gradient α is advantageously embodied such that it captures the conveyor segments 11 even if the conveyor segments 11 are deflected to the maximum relative to the toothed belt 14 (or 20) and all other tolerances are taken into account. No slope of angle alpha is required on the roll-out side (right).

List of reference numerals

1 printing machine

2 sheet of printing material

3 printing station

3a-d print head

4 feeder

5 Material collector

6 conveying equipment

7 direction of conveyance

8 conveying path

10 conveying table

11 conveying section

12 gap

13 first section

14 first drive/toothed belt/chain

15 second section

16 second drive/drive spindle

17 drive roller

17' roller body

17' sliding body

17a drive bearing/drive roller

17b sprung counter bearing/counter roller body/counter roller

18 drive spindle

18a axis of rotation

18b action surface

19 driver/coupling piece

20 drive/toothed belt

21 spring

22 guide part

23 guide rail

24 guide roller

25 support roller

26 another drive spindle

27 suction box

28 suction hole

29 suction opening

30 worm drive mechanism

31 first gear

32 second gear

33 driver/motor

34 drive shaft

35 tooth-shaped belt shaft

36 conical gear

37 synchronous belt

38 toothed belt pulley

s pitch

length of the supporting roller

Alpha Start Angle/Start gradient

Beta 1 roll-in angle/roll-in slope

Beta 2 roll-out angle/roll-out slope