| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder device which is easy in the maintenance of detection valves.SOLUTION: A piston (10) is inserted into a housing (1) so as to be ascendable and descendable, and hydraulic oil can be supplied to and discharged from a drive chamber (11) arranged at the upper side of the piston (10). An output rod (15) inserted into an upper wall (2) of the housing (1) is upwardly protruded from the piston (10). A first detection valve (31) for detecting descent and a second detection valve (32) for detecting ascent are arranged at the upper wall (2) at the external peripheral side of the output rod (15) with a prescribed interval in the circumferential direction. The first detection valve (31) and the second detection valve (32) have parts (49), (79) to be operated which face the piston (10) from the upper side, respectively. Pressurizing air can be supplied to respective inlets (31a), (32a) of the first detection valve (31) and the second detection valve (32) via a first supply passage (B1) and a second supply passage (B2). |
