| 摘要 |
A core wire holder 20 is formed with a core wire insert hole 21 having an opening part 22 on an upper surface of a main body and extending toward a lower surface side, and a silicon core wire 5 is inserted into the core wire insert hole 21. In addition, a slit-like gap part 60 extending along a virtual plane P including a central axis C of the core wire insert hole 21 is formed, and the slit-like gap part 60 is a gap part extending from the core wire insert hole 21 to reach an outer surface of the main body of the holder 20. The silicon core wire 5 inserted in the core wire insert hole 21 is fixed by fastening an upper part of the main body of the holder 20 from sides with, for example, a bolt/nut type fixing member 31. |
