FORMING DEVICE OF ORIGINAL DISC FOR RECORDING

摘要

PURPOSE:To suppress sharply stick slip vibration and vibration due to the unbalanced rotation of an original disc or the like by forming a guiding part supporting a vertical load out of a sliding bearing of a feeding board as a sliding surface consisting of resin and forming recessed parts on the sliding surface to supply pressed air into the recessed parts. CONSTITUTION:Two recessed parts 37 are formed on a resin coating layer formed on the lower surface of a sliding block 32. Air feeding holes 38 for discharging gas are formed on the bottoms of the recessed parts 37 respectively and pressed air supplied from a pressed air source 39 such as a compressor is supplied to the recessed parts 37. The connection surface pressure between the surfaces of the resin coating layers 35, 36 on the lower surface of the sliding block and the upper surfaces of the sliding guides 30, 31 can be optionally set up by adjusting the pressure of the pressed air to be supplied to the recessed parts 37. Since a resin material reducing the difference between a statical friction factor and a dynamic friction factor is adopted as the sliding surface and contact force between the contact surfaces is reduced by air pressure, the generation of stick slip is prevented.