| 摘要 |
A projection portion ( 145 ) protruding from a bottom surface 8141 a) on a core portion side towards the center of the core portion ( 130 ) is formed in a core plate ( 140 ). A bond portion ( 142 a) between a tube ( 132 ) and the core plate ( 140 ) is arranged closer to the center side of the core portion ( 130 ) than the bottom surface ( 141 a) and at substantially the same position in a tube longitudinal direction X with respect to a push surface ( 143 a) of a packing ( 150 ). Therefore, even when a load in a direction intersecting at right angles the tube longitudinal direction is applied to a formation portion of a fitting groove portion ( 143 ), the occurrence of a bending moment can be suppressed. |
