| 摘要 |
PURPOSE:To perform accurate control and maintenance of the heights and the levels of a load support frame and a device mounted thereon by selectively determining the reference height of a load support means through regulation of a relative position between an air control member and an exhaust port. CONSTITUTION:An improved air release controller 30 containing a body member 32 mounted on a base means 10 is contained. An inlet 60 through which pressure air is received from blowdonw, a conduit means 50, and an exhaust port 52 through which air is released from an air chamber 20 are formed in the body member 32. The air release controller 30 contains a simple regulatable air release control member 36 mounted on a load support means 12 and operated in coordination with the exhaust port 52 of the body member 32. The reference set heights or the levels of the load support means 12 and a device supported thereto are selectively and accurately determined and maintained. |
