| 摘要 |
A gate valve comprises a valve rod (24) for making displacement in accordance with a driving action of a cylinder mechanism (44); a guide shaft (70a, 70b) for guiding the valve rod (24); a valve disk (26) for opening/closing a passage (32) in accordance with a displacement action of the valve rod (24); a rack (98) connected to the valve rod (24), for making displacement integrally with the valve rod (24); a pinion (l00a, 100b) rotatably supported by a casing (76), for meshing with the rack (98); and a pillow member (106a, 106b) connected to the valve disk (26) and formed with a male thread (108) for making engagement with a female thread (102) formed on an inner circumferential surface of the pinion (100a, 100b). <IMAGE> |
