US 12,033,792 B2
Manufacturing apparatus for laminated iron core
Hironobu Okudaira, Yokohama (JP); Hideo Horii, Nagano (JP); and Kenichi Shindo, Kunitachi (JP)
Assigned to Kuroda Precision Industries Ltd., Kawasaki (JP)
Filed by Kuroda Precision Industries Ltd., Kawasaki (JP)
Filed on Feb. 11, 2022, as Appl. No. 17/669,447.
Application 17/669,447 is a division of application No. 16/318,412, granted, now 11,355,282, previously published as PCT/JP2017/000359, filed on Jan. 9, 2017.
Prior Publication US 2022/0165492 A1, May 26, 2022
Int. Cl. H01F 41/02 (2006.01); B21D 28/00 (2006.01); H01F 3/04 (2006.01); H02K 15/02 (2006.01)
CPC H01F 41/0206 (2013.01) [B21D 28/00 (2013.01); H01F 3/04 (2013.01); H01F 41/0233 (2013.01); H02K 15/02 (2013.01); H02K 15/024 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A manufacturing apparatus for a laminated iron core formed by stacking and bonding iron core laminae each formed by punching a sheet steel strip into a predetermined shape, the manufacturing apparatus comprising:
an upper holder and a lower holder;
a die plate provided on the lower holder;
a guiding member provided on the lower holder, the guiding member guiding conveyance of the sheet steel strip along an intermittent conveyance direction of the sheet steel strip and limiting upward movement of the sheet steel strip;
an adhesive applicator provided on at least one of the upper holder and the lower holder, the adhesive applicator applying an adhesive agent to an adhesive agent applying surface at a section of the sheet steel strip corresponding to each iron core lamina;
a pilot pin provided on the upper holder, the pilot pin being configured to he inserted through a pilot hole formed in the sheet steel strip so as to perform positioning of the sheet steel strip in the adhesive applicator;
a stripper plate provided on the upper holder so as to be displaceable in a vertical direction, the stripper plate having a lower surface opposed to an upper surface of the die plate;
a plurality of lifters provided on the lower holder so as to be displaceable in the vertical direction, the plurality of lifters separating the sheet steel strip from the upper surface of the die plate by coming into abutment with a lower surface of the sheet steel strip; and
a plurality of lifter springs that bias the lifters upward so as to separate the sheet steel strip from the upper surface of the die plate, with the stripper plate being in abutment with an upper surface of the sheet steel strip and the lifters being in abutment with the lower surface of the sheet steel strip, when the stripper plate ascends,
wherein the guiding member has a lower surface opposing the upper surface of the die plate from above with a first predetermined distance therebetween to limit the upward movement of the sheet steel strip and a stopper surface facing downward and opposing the upper surface of the die plate from above with a second predetermined distance smaller than the first predetermined distance therebetween such that an upper surface of each lifter can come into abutment with the stopper surface.