| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve assembling workability when multiple plate materials are provided inside a header.SOLUTION: Inside the header 10, an upper-side closing plate material 13, a lower-side closing plate material 14, and an intermediate plate material 15 are disposed in a longitudinal direction of a peripheral wall part so as to be spaced apart from one another. Engaging claws 31, 32 are formed in the upper-side closing plate material 13. Engaging claws 51, 52 are formed in the intermediate plate material 15. A protrusion length of the engaging claws 51, 52 of the intermediate plate material 15 is configured to be longer than that of the engaging claws 31, 32 of the upper-side closing plate material 13.</p> |
