| 摘要 |
PROBLEM TO BE SOLVED: To provide a center core which can prevent coated wire formed in coil shape as a grasped wire from being injured and can prevent the grasped wire from causing grasping collapse.SOLUTION: In a plate-like center core 1 to be inserted to a columnar space S in a grasped wire 100 formed in coil shape by winding coated wire 101, the insertion state center core 1b which has a tapered shape tapering downward in order to be inserted to the columnar space S of the grasped wire 100, is constituted with a pyramidal body of a reverse square truncated pyramid shape of which a bottom surface constitution part 11 is approximately square, has an upper end contour of the pyramidal body larger than an upper surface of the columnar space S and has a height of pyramidal body higher than a height of the grasped wire 100 is formed.SELECTED DRAWING: Figure 1 |
