PURPOSE:To automatically effect continuous assembling and taking-out of a core by lifting a core assembly upwardly of a cylic chain via vertically movable rails and holding said assembly with a sampling device between said vertically movable rails to sample it to the outside. CONSTITUTION:A core assembly 13 continuously assembled at a high speed is sent out from front ends of vertically fixed rails 12, 7 via cyclic chain 8, and received by vertically movable rails 25, 26. Thereafterm the assembly is lifted upwardly of the cyclic chain 8 by elevating both the movable rails 25, 26 by means of an elevator 27, and held by a movable compression pawl 38 of a core sampling device by making use of the movement of said pawl in an M1 direction, whereby the assembly is sampled from between the vertically movable rails 25, 26. Thereafter, the vertically movable rails 25, 26 return to a position aligned with the vertically fixed rails 12, 7. Thus, a core assembly can be taken out without interrruption of continuous assembling operation for a heat exchanger core.
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