| 摘要 |
A molding die 51 is provided with cavities 54, 55 for fixing, by insert molding, round shaped collars 33 or oblong shaped collars formed of metal to inner faces of insertion holes which are respectively formed in a plurality of fixing parts of a box body. In each of the cavities 54 which is provided with a cylindrical boss part 61 on which the round shaped collar 33 is mounted, there are provided a plurality of projections 63 which do not interfere when the round shaped collar 33 is inserted over the cylindrical boss part 61, but interferes when the oblong shaped collar is inserted over the cylindrical boss part 61, thereby to prevent the oblong shaped collar from being erroneously inserted over the cylindrical boss part. |
