Sheet-processing machine comprising a turning device with a sheet-guiding drum, and method for adjusting the format of a sheet-guiding drum

Patent metadata

Field	Value
Publication number	US-10046932-B2
Application number	US-201615547577-A
Country	US
Kind code	B2
Filing date	Apr 20, 2016
Priority date	May 27, 2015
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A turning device in a sheet-processing machine includes a sheet-guiding drum. The sheet-guiding drum has at least one gripper system for securing a front edge of a sheet. The sheet-guiding drum also has at least three casing segments cooperating in the circumferential direction and engaging with one another during format adjustment. A method for the format adjustment of a sheet-guiding drum is also disclosed. The object of the invention is to further improve the sheet guiding on format-adjustable sheet-guiding drums in sheet-processing machines. This is achieved in that a middle casing segment in the circumferential direction has a drive.

First claim

The invention claimed is:

1. A sheet-processing machine comprising a turning device with a sheet-guiding drum ( 2 ),
wherein the sheet-guiding drum ( 2 ) has at least one gripper system ( 6 ) for securing a leading edge of a sheet, and
wherein the sheet-guiding drum ( 2 ) has at least three casing segments ( 8 , 9 ) that cooperate in the circumferential direction of the sheet-guiding drum ( 2 ) and engage with one another during format adjustment,
wherein a leading casing segment ( 8 ), a trailing casing segment ( 9 ) and a middle casing segment are arranged in the circumferential direction of the sheet-guiding drum ( 2 ),
wherein the middle casing segment has a drive mechanism, and
wherein the drive mechanism comprises a gear wheel ( 14 , 15 ) that meshes with a toothed segment ( 13 , 16 ) for the middle casing segment.

2. The sheet-processing machine according to claim 1 , characterized in that the drive mechanism is configured to generate a movement of the middle casing segment relative to the casing segment ( 8 ) that supports a leading portion of a sheet and/or relative to a casing segment ( 9 ) that supports a trailing portion of a sheet.

3. A sheet-processing machine comprising a turning device with a sheet-guiding drum ( 2 ), wherein the sheet-guiding drum ( 2 ) has at least one gripper system ( 6 ) for securing the leading edge of a sheet, and
wherein the sheet-guiding drum ( 2 ) has at least three casing segments ( 8 , 9 ) that cooperate in the circumferential direction of the sheet-guiding drum ( 2 ) and engage with one another during format adjustment,
wherein a leading casing segment ( 8 ), a trailing casing segment ( 9 ) and a middle casing segment are arranged in the circumferential direction of the sheet-guiding drum ( 2 ),
wherein the middle casing segment has at least one sheet-supporting surface, which is located immediately adjacent to a sheet-supporting surface of the casing segment ( 8 ) that supports the leading portion of a sheet, and immediately adjacent to a sheet-supporting surface of the casing segment ( 9 ) that supports the trailing portion of a sheet, and
wherein the middle casing segment comprises bridging elements ( 10 ) that include the sheet-supporting surfaces, and at least one bridging element ( 10 ) is arranged in the axial direction of the sheet-guiding drum ( 2 ) with its lateral face adjacent to a lateral face of a segment tooth of the leading casing segment ( 8 ) that supports the leading portion of a sheet, and with its opposing lateral face immediately adjacent to a lateral face of a segment tooth of the trailing casing segment ( 9 ) that supports the trailing portion of a sheet.

4. The sheet-processing machine according to claim 1 , characterized in that the middle casing segment is mounted coaxially to the rotational axis of the sheet-guiding drum ( 2 ).

5. The sheet-processing machine according to claim 1 , characterized in that the middle casing segment has a plurality of sheet-supporting surfaces across the width of the drum, and a plurality of these sheet-supporting surfaces are mounted on a common carrier ( 11 ).

6. The sheet-processing machine according to claim 1 , characterized in that bridging elements ( 10 ) of the middle casing segment have sheet-supporting surfaces and are allocated to a carrier ( 11 ) such that they can be adjusted, aligned and/or exchanged.

7. The sheet-processing machine according to claim 1 , characterized in that one drive mechanism can be used to collectively adjust the format of a plurality of casing segments ( 9 ) in a gearing ratio relative to one another that is not equal to one.

8. The sheet-processing machine according to claim 1 , characterized in that on the circumferential surface, a functional surface ( 12 ) that extends in the circumferential direction and across the entire width of the sheet-supporting surface is assigned to a casing segment ( 9 ) that supports the trailing portion of a sheet and/or to a casing segment ( 8 ) that supports the leading portion of a sheet.

9. The sheet-processing machine according to claim 1 , characterized in that rotary suckers ( 17 ) for securing and/or straightening a sheet trailing edge during sheet transport are assigned to at least one casing segment ( 9 ) that supports the trailing portion of a sheet.

10. The sheet-processing machine according to claim 1 , characterized in that all casing segments ( 9 ) that support trailing portions of a sheet can be adjusted to the respective sheet trailing edge by means of one drive mechanism, wherein all middle casing segments between the casing segments ( 9 ) that support the trailing sheet portions and the casing segments ( 8 ) that support the leading sheet portions can be adjusted at the same time.

11. A method for adjusting the format of a sheet-guiding drum ( 2 ), wherein the sheet-guiding drum ( 2 ) has at least three casing segments ( 8 , 9 ) that cooperate in the circumferential direction of the sheet-guiding drum ( 2 ) and engage with one another during format adjustment, and wherein a drive mechanism is provided for format adjustment,
wherein a leading casing segment ( 8 ), a trailing casing segment ( 9 ) and a middle casing segment are arranged in the circumferential direction of the sheet-guiding drum ( 2 ),
wherein the middle casing segment is driven during format adjustment, and wherein during format adjustment, a sheet-supporting surface of the middle casing segment slides along immediately adjacent to a sheet-supporting surface of the casing segment ( 8 ) that supports the leading portion of a sheet and immediately adjacent to a sheet-supporting surface of the casing segment ( 9 ) that supports the trailing portion of a sheet.

12. The method according to claim 11 , characterized in that during a format adjustment, the middle casing segment is displaced jointly with at least one casing segment ( 9 ) that supports the trailing portion of a sheet, wherein the middle casing segment is moved by means of transmission gearing.

13. The method according to claim 11 , characterized in that during a format adjustment, the middle casing segment is displaced jointly, in a gearing ratio that is not equal to one, with a casing segment ( 9 ) that supports the trailing portion of a sheet.

14. The method according to claim 11 , characterized in that at least one casing segment ( 9 ) that supports the trailing portion of a sheet and/or a trailing edge suction system is adjusted to the respective sheet trailing edge.

15. The method according to claim 11 , characterized in that sheets are straightened in the longitudinal direction and/or axially during sheet transport by the sheet-guiding drum ( 2 ).

Assignees

• Koenig & Bauer Ag

Inventors

• Schumann Frank
• Koch Michael
• Ziegenbalg Christian
• Becker Uwe
• Seefeld Jorg
• Peter Gunter
• Jentzsch Arndt

Classifications

• B41F21/108 Primary

  with pneumatic means · CPC title

• B65H5/12 Primary

  Revolving grippers, e.g. mounted on arms, frames or cylinders · CPC title

• B65H9/00

  Registering, e.g. orientating, articles; Devices therefor · CPC title

• B65H5/062

  between rollers or balls · CPC title