PURPOSE: To provide a structure, in which both members are tightly joined with each other by utilizing thermal, dimensional change by a constitution wherein at least either one of heat conductive member to radiate or absorb heat and passage member to form a passage of medium to heat or to be heated is made of irreversible shape memory alloy.
CONSTITUTION: The passage pipe 3, which penetrates flanged holes 2 of a large number of fins 1, is in a state to slightly contact with said flanged holes 2 in a finned tube type heat exchanger. The passage pipe 3 is made of irreversible shape memory alloy and its diameter is finished smaller than that of the flanged hole 2 at normal temperature. When heated under the state as mentioned above, the diameter of the passage pipe 3 increases, resulting in completely joining the passage pipe 3 to the flanged holes 2 of the fins 1.
MORI SHIYUNICHIROU
TAKAHASHI YUTAKA
FUKUDA YUU
