US 11,052,562 B2
Tool-holder column, unit for converting a flat substrate, and methods for removing a rotary tool from and mounting it in a conversion unit
Boris Béguin, Féchy (CH); and Philippe Clément, Penthalaz (CH)
Assigned to BOBST MEX SA
Appl. No. 15/532,129
Filed by BOBST MEX SA, Mex (CH)
PCT Filed Nov. 20, 2015, PCT No. PCT/EP2015/025087
§ 371(c)(1), (2) Date Jun. 1, 2017,
PCT Pub. No. WO2016/087048, PCT Pub. Date Jun. 9, 2016.
Claims priority of application No. 14020100 (EP), filed on Dec. 4, 2014.
Prior Publication US 2017/0266833 A1, Sep. 21, 2017
Int. Cl. B26D 7/26 (2006.01); B31F 1/07 (2006.01); B31F 1/10 (2006.01); B31B 50/25 (2017.01); B31B 50/14 (2017.01); B31B 50/88 (2017.01); B31B 100/00 (2017.01)
CPC B26D 7/265 (2013.01) [B31B 50/14 (2017.08); B31B 50/25 (2017.08); B31F 1/07 (2013.01); B31F 1/10 (2013.01); B31B 50/146 (2017.08); B31B 50/256 (2017.08); B31B 50/88 (2017.08); B31B 2100/002 (2017.08); B31F 2201/0753 (2013.01); B31F 2201/0776 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A conversion unit configured to convert a flat cardboard substrate, the conversion unit comprising a pair of tool-holder columns and a pedestal configured to support the pair of tool-holder columns, the pair of the tool-holder columns comprising:
a first tool-holder column and a second tool-holder column;
an upper rotary tool and a lower rotary tool, the upper and lower rotary tools configured to convert the flat cardboard substrate;
two upper bearings, each of the upper bearings configured to support one end of the upper rotary tool, and two lower bearings, each of the lower bearings positioned to support one end of the lower rotary tool, the flat substrate being movable longitudinally along a longitudinal path between the upper rotary tool and the lower rotary tool,
wherein the two upper bearings move in a vertical direction opposite to a vertical movement of the two lower bearings, the movement of the two upper bearings away from the two lower bearings creating vertical space between the two upper bearings and the two lower bearings;
a common drive for the two upper bearings and the two lower bearings, the common drive configured to facilitate the vertical movement of the two upper bearings and the two lower bearings simultaneously by one and the same distance in the opposite directions, and the common drive comprising:
a screw device, the two upper bearings being mounted above the two lower bearings on the screw device such that rotation of the screw device causes a linear movement of the two upper bearings and the two lower bearings in the opposite directions,
wherein the screw device comprises:
a first screw positioned at a first upper bearing of the two upper bearings and at a first lower bearing of the two lower bearings, and
a second screw positioned at a second upper bearing of the two upper bearings and at a second lower bearing of the two lower bearings, and arranged parallel to the first screw; and
the first tool-holder column further comprising a transverse slide with a length in a first direction parallel to axes of the upper and lower rotary tools; and
the pedestal comprising a transverse guide rail with a length in the first direction and configured to cooperate with the transverse slide of the first tool-holder column such that the first tool-holder column is moved in the first direction with respect to the second tool-holder column between;
an operational position in which the two upper bearings and the two lower bearings engage with the ends of the upper and lower rotary tools, and
a maintenance position in which the first tool-holder column is spaced apart from the operational position, and in the maintenance position one of the upper bearings and one of the lower bearings positioned at the first tool-holder column is free from engagement with the ends of the upper and lower rotary tools.