| 摘要 |
PURPOSE: To pull a through bolt over again without screwing a tensile nut by providing a thrust nut with a plurality of fixing screws which pierce the nut in parallel under the condition that they are positioned around the center thread hole. CONSTITUTION: A through bolt 25 pierces the iron core 15 of a stator for compression of stack-form die-cut plates 19. Then, the first thread end 27 of the bolt 25 is screwed through a tensile nut 41, and stress is added to the bolt 25. Moreover, a thrust nut 51 is screwed to the second thread end 29 of the through bolt 25. A plurality of fixing screws 57 are accommodated in holes 59 for fixing screws arranged around the center hole. To pull the through bolt 25 over again, torque is added to the fixing screw 57. Thus, the through can be pulled again easily. |
