| 摘要 |
<p>A set of bolt holes (42a, 42b) through which bolts are inserted are formed in left and right sides of a large end section (38). The bolt holes (42a, 42b) are substantially parallel to the axis of a rod section (34) and are located such that the centers of the bolt holes (42a, 42b) are each displaced from the center of a cut surface. When a first mandrel (114) and a second mandrel (120) are press fitted to a joint hole (36) of the large end section (36) and are cut and split, the area of contact of the second mandrel (120) on the movable stage (64) side with the inner wall of the joint hole (36) is set greater than the area of contact of the first mandrel (114) on the fixed stage (62) side with the inner wall of the joint hole (36).</p> |
