CORE GRASPING METHOD

Provided is a core grasping method of grasping a core using a core grasping apparatus. The core grasping apparatus includes grasping devices respectively having expandable and contractible grasping parts. The core includes holes, and at least one of the holes has an inside diameter that decreases in the opposite direction from a direction of a turning moment occurring on the core. The core grasping method involves, when grasping the core, expanding the grasping parts inserted in the holes so as to bring the grasping parts into contact with inner walls of the holes of the core, and grasping thecore and applying a force that suppresses the turning moment to the core. 所提供的是种使用型芯夹持设备夹持型芯的型芯夹持方法。型芯夹持装置包括分别具有能够膨胀和收缩的夹持部的夹持装置。型芯包括孔，并且所述孔中的至少个孔的内直径在与型芯上产生的转动力矩的方向相反的方向上减小。型芯夹持方法包括：在夹持型芯时，使插入孔中的夹持部膨胀以使夹持部与型芯的孔的内壁接触，以及夹持型芯并向型芯施加抑制转动力矩的力。