| 摘要 |
PROBLEM TO BE SOLVED: To configure a base body and a balance weight which are mounted to a cylinder shaft while abutting thereon, in such a way that the balance weight can be independently replaced without removing the base body from the cylinder shaft.SOLUTION: A balance weight 15 is fixed to a cylinder shaft 12 by balance weight fixing bolts 17 screwed into female screw parts formed in the cylinder shaft 12. A base body 14 includes an inner surface abutting on the outer peripheral surface of the cylinder shaft 12 and is fixed, in a state of facing the balance weight 15 with the cylinder shaft 12 in between, to the cylinder shaft 12 by base body fixing bolts 19 which pass through the cylinder shaft 12 from the side of the balance weight 15 and are screwed into female screw parts 14b formed in the inner surface. Bearing surfaces with which head parts 19a of the base body fixing bolts 19 are brought into contact are located in the cylinder shaft 12. |
