| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent buckling of a connecting member for connecting a plurality of extruding members for extruding a retaining member outside in a radial direction in a core tube retainer for pressing an inner circumferential face of a core tube by the retaining member to retain the core tube. <P>SOLUTION: The core tube retainer includes the plurality of extruding members each of which has a pressing part and which stand in a line away to an axial direction, the connecting member for connecting the plurality of extruding members, the retaining member having a part to be pressed corresponding to a pressing part for each position in the axial direction, and an action part for exerting a force which moves a one end extruding member at an end on one side in the axial direction of the plurality of extruding members to the one side, wherein at least one of the pressing part and the part to be pressed is formed in a tapered shape which extends outside in a radial direction as heading from the one side in the axial direction to the other side. In addition, when the force for moving to the one side via the action part acts on the one end extruding member, the one end extruding member pulls the other extruding members via the connecting member while moving to the one side, and the pressing part of each extruding member extrudes the retaining member outside in the radial direction via the corresponding part to be pressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
