| 摘要 |
According to an embodiment, an upper-side bearing cover 50a configuring a bearing stand cover 50 is provided with an upper-side large-diameter semicylindrical body 70 which is disposed to cover the periphery of a bearing stand 31 and has a semicylindrical shape with its one end closed, and an upper-side small-diameter semicylindrical body 71 having a semicylindrical shape which is integrally formed from the other open end of the upper-side large-diameter semicylindrical body 70 to cover a rear gland packing portion 40 and which has an outer diameter smaller than that of the upper-side large-diameter semicylindrical body 70. A reduced cylindrical body 72 is disposed between the upper-side large-diameter semicylindrical body 70 and the upper-side small-diameter semicylindrical body 71. An upper-side passage forming semicylindrical body 75 is configured as a different body to cover the peripheries of the upper-side small-diameter semicylindrical body 71 and the reduced cylindrical body 72. |
