Roll changer and process for removing a residual roll from an axle

• US 20030071162A1
• Filed: 10/15/2002
• Published: 04/17/2003
• Est. Priority Date: 10/15/2001
• Status: Active Grant

• Current Assignee: Maschinenfabrik Wifag
• Original Assignee: Maschinenfabrik Wifag
• Inventors: Moser, Hans
• Granted Patent: US 6,953,172 B2
• Time in Patent Office: Days
• US Class Current: 242/559
• CPC Class Codes: B65H 19/126 with both-ends supporting arrangements
• CPC Class Codes: B65H 2301/41346 separate elements engaging each end of the roll (e.g. chuck)
• CPC Class Codes: B65H 2301/4173 by central portion, e.g. gripping central portion
• CPC Class Codes: B65H 2301/41856 by stripping core from mandrel or chuck, e.g. by spring mechanism
• CPC Class Codes: B65H 2407/10 Safety means, e.g. for preventing injuries or illegal operations
• CPC Class Codes: B65H 2553/42 Cameras

Abstract

A roll changer for a web-treating or web-processing machine, or a web-fed printing press is provided. The roll changer includes a first roll arm (4) with a first axle journal (8), which can be pivoted about a pivot axis (3), and a second roll arm (5) with a second axle journal (8), which can be pivoted about the pivot axis (3) together with the first roll arm (4). The axle journals (8) form a rotary mount for a web roll (10) taken up between the roll arms (4, 5). A first stripper (9) is assigned to the first axle journal (8) and can be moved in relation to the first axle journal (8), in order to strip the web roll (10) from the first axle journal (8). A drive (11a-11d) is provided for pivoting the roll arms (4, 5) and moving the first stripper (9). A control device (12) controls the drive (11a-11d) for a manual removal of a web roll (10) so that the web roll (10) mounted on the axle journal (8) is stripped by the first stripper (9) from the first axle journal (8), while it remains on the second axle journal (8).

Claims

1. A roll changer for a web-treating or web-processing machine or web-fed printing press, the roll changer comprising:

a first roll arm with a first axle journal, which can be pivoted about a pivot axis;

a second roll arm with a second axle journal, which can be pivoted about said pivot axis together with said first roll arm, whereby said first axle journal and said second axle journal form a rotary mount for a web roll taken up between roll arms;

a stripper assigned to said first axle journal and movable in relation to said first axle journal to strip a web roll from said first axle journal;

a drive means for pivoting said roll arms and moving said first stripper;

a control means that controls said drive means for a manual removal of said web roll so that the web roll mounted on said axle journal is stripped by said stripper from said first axle journal while the web roll remains on said second axle journal.

2. A roll changer in accordance with claim 1, further comprising a second stripper assigned to said second axle journal and movable in relation to said second axle journal by said drive means to strip the web roll from said second axle journal.

3. A roll changer in accordance with claim 2, wherein said stripper and said second stripper can be moved on top of one another by means of said control means and of said drive means to automatically strip the web roll from both said first axle journal and said second axle journal and to hold the web role in a clamping manner between them.

4. A roll changer in accordance with claim 2, wherein said stripper can be moved separately by means of said control means and said drive means in relation to said first axle journal.

5. A roll changer in accordance with claim 1, wherein said control means has at least two control modes to control said drive means for the removal of the web roll manually according to a first control mode and for a fully automatic removal in another, second control mode.

6. A roll changer in accordance with claim 1, further comprising:

a detection means monitoring a protected zone surrounding said roll arms in order to detect whether a part of a person is in said protected zone;

a safety means connected with said detection means, said safety means in a blocked state preventing said drive means from moving said roll arms parallel to an axis of rotation of said web roll and/or from pivoting about said pivot axis, whereby said safety means assumes the blocked state when said detection means detects that a part of a person is in said protected zone.

7. A roll changer in accordance with claim 1, wherein said detection means forms a barrier, as a contact-free, working barrier, for said protected zone.

8. A roll changer in accordance with claim 1, wherein said detection means comprises a scanner to monitor said protected zone in a manner covering an area.

9. A roll changer in accordance with claim 6, wherein said control means comprises a operating means for said roll changer, said operating means being arranged outside of said protected zone.

10. A roll changer in accordance with claim 9, wherein said operating means has at least one said operating element for actuating said drive means and additionally has at least one safety element, by whose actuation a blocking of said drive means is brought about by means of said safety means and the blocked state of said safety means is lifted.

11. A roll changer in accordance with claim 6, wherein a blocked state of said safety means is lifted only if said detection means detects that at least a person detected beforehand by said detection means has again left said protected zone.

12. A roll changer in accordance with claim 6, wherein no operating elements are arranged in said protected zone, with which a movement of one of said roll arms parallel to the axis of rotation of said web roll and/or a pivoting movement of one of said roll arms brought about by means of said drive means can be triggered manually.

13. A roll changer in accordance with claim 6, wherein said control means comprises said safety means and stops said drive means by means of a position signal if said detection means detects that a person is in said protected zone.

15. A process in accordance with claim 1, wherein said roll arms, after a roll change and before the stripping, are pivoted into a comfortable pivoting position for a removal and are stripped on one side in this pivoting position.

14. A process for removing a residual roll from an axle, which is rotatably mounted between roll arms in a roll changer of a web-treating, web-processing machine, or web-fed printing press, on a first and a second axle journal of roll arms of the roll changer, the process comprising:

automatically stripping the residual roll for a manual removal from the first journal while the residual roll remains on the second axle journal.