| 摘要 |
The invention has its object to provide a diaphragm type high pressure shut-off valve which is simple in external shape, can realize miniaturization and is convenient in handling. The shut-off valve comprises a cylindrical housing (10) having a supply unit for compressed air at its end in an axial direction (Q), a piston (19) provided in the housing (10) and adapted to reciprocate in response to the compressed air, a return spring (20) provided in the housing (10) so as to permit the piston (19) to return, a rack portion (19A) provided to extend from the piston (19), a cam pinion (17) having a pinion portion (17B) for engagement with the rack portion (19A), a cam face portion (17A) provided integrally with the pinion portion (17B) and a rotating shaft (18) supported by the housing (10), and a diaphragm (7) adapted for movement in response to displacements of stems (9, 13) and abutting against the cam face portion (17A) of the cam pinion (17). As a drive mechanism and an energizing mechanism are accommodated in the single cylindrical housing, it is possible to realize adequate miniaturization and simplification to thereby contribute to reduction of the number of parts. |
