| 摘要 |
PURPOSE:To mount a ground coil with stable and sufficient strength without increasing the work amount of a mounting operation by providing a bush which is arranged inside an opening part, which comes into contact with an insert and which is composed of a material whose mechanical strength is high. CONSTITUTION:A bush 7 composed of a material such as a metal or the like whose mechanical strength is high is arranged inside an opening part 1b in a ground-coil mounting part 1a, and it is brought into contact with an insert 3a. The bush 7 is molded integrally with the ground-coil mounting part 1a. A recessed part 8 which is combined with the bush 7 and which prevents the bush 7 from being dislocated with reference to the insert 3a is formed in the insert 3a. Thereby, an axial force can be increased when a bolt 4 is fastened, it is possible to prevent the bush 7 from being dislocated with reference to the insert 3a by fitting the bush 7 to the recessed part 8, and a ground coil can be supported strongly. |
