JPH05234011

PURPOSE:To facilitate the operation to insert core holders, etc., into a shielding case, to stably execute the exact positioning, to drastically shorten the time of assembly operations and to facilitate the automation of assembly. CONSTITUTION:A U- or C-shaped first leaf spring 2 which independently press core holders 5, 5 betted against each other and a second leaf spring 1 for pressing the side of the one core holder 5 are fixed into the shielding case 3. The deep sides of the first leaf spring 2 and the second leaf spring 1 are bent inward of the case. The bent part 1b of the first leaf spring 2 is positioned on the front side of the bent part 1b of the second leaf spring to prevent the first leaf spring 2 for regulating the position in the gap width direction of the core holders 5, 5 and the second leaf spring 1 for regulating the core holders in the length direction of the gap from simultaneously pressing the core holders 5, 5. The core holders 5, 5 in the divided state are held and integrated between the blocks and the shielding case 5 by pressing the cores in the gap width direction and thereafter the entire part us moved in the gap length direction (laterally), by which the core blocks are positioned in the gap length direction.