| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and easily execute the exchanging work of a corona wire. SOLUTION: The corona wire 2 is provided with a first terminal 21 having a first ring part 21a formed to be like a ring, a first lock part 21b formed so that it is not like the ring and a spring part 21c intervening between the ring part 21a and the lock part 21b, a second terminal 22 having a second ring part 22a formed to be like the ring and a second lock part 22b formed so that it is not like the ring and integrally arranged at the ring part 22a and a wire 23 whose one end is held by the first ring part of the first terminal and whose other end is held by the second ring part of the second terminal. Generally, corona discharge is more efficiently executed as the diameter of the wire 23 becomes smaller. Since working man-power and time required when the wire is exchanged are reduced when the corona wire is constituted in such a way, mechanical load imposed on the wire 23 is suppressed. Besides, even when the wire whose diameter is <=80μm is used, it is effective because the wire is hardly cut.
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