| 摘要 |
To provide a joining and uniting means which does not cause two metal plate materials, which are to be joined into a unitary structure by curling, to become out of alignment when they are put together, and which does not, moreover, require an operation for aligning a projection or a cut and raised portion and a hole with each other, a projection (11) is formed on an end portion (21) of one metal plate material (5), and this projection (11) is pushed forcibly into an end portion (22) of the other metal plate material (9, 10), whereby two metal plate materials are joined into a unitary structure. <IMAGE> |
