| 摘要 |
PURPOSE:To adopt a bellows seal and ensure high air-tightness in a valve extension penetrating part, by equipping a converting mechanism between rotary motion and linear motion. CONSTITUTION:Each end part of an extension rod 3 and a stem 10 is screwed to screws 23, 24 provided to both end parts of a connecting member 11, and a handle 5 is mounted to the other end of the stem 10. One end of a bellows 12 is fixed to a flange 8 of a cylindrical sleeve 22 while the other end is fixed to said member 11. While the member 11 is mounted to the flange 8 through a key to perform only movement in the axial direction along the key. At opening operation of a valve, if the stem 10 is rotated by the handle 5, this rotary motion is converted into motion in the axial direction of the member 11 by action of the screw 24 and the key while into rotary motion of the rod 3 by action of the screw 23, and a valve provided to the part of a rod 3F is opened. |
