Medium fixing method and medium support apparatus

A medium fixing method of fixing one or a plurality of mediums on a shaft while the one or plurality of mediums each having a circular opening portion in a substantially center are stacked and the shaft is inserted into the opening portions, comprising fixing the mediums to the shaft while performing position adjustment between the shaft and the mediums by forming a fluid film between a side surface portion of the shaft and inner circumferential surfaces of the opening portions of the mediums.

A medium fixing method of fixing one or a plurality of mediums on a shaft while the one or plurality of mediums each having a circular opening portion in a substantially center are stacked and the shaft is inserted into the opening portions, comprising fixing the mediums to the shaft while performing position adjustment between the mediums and the shaft by preparing a guide around the mediums and forming a fluid film between an inner surface portion of the guide and outer circumferential surfaces of the mediums.

A medium support apparatus comprising a function of stacking one or a plurality of mediums each having a circular opening portion in a substantially center, inserting a shaft into the opening portions of the mediums, inserting a porous material between a side surface portion of the shaft and inner circumferential surfaces of the opening portions of the mediums, and adjusting gasp between the inner circumferential surfaces of the opening portions of the mediums and the shaft by forming a fluid film between a side surface portion of the shaft and the inner circumferential surfaces of the opening portions of the mediums, thereby positioning the mediums.

A medium support apparatus comprising a function of stacking one or a plurality of mediums each having a circular opening portion in a substantially center, inserting a shaft into the opening portions of the mediums, fixing the mediums to the shaft, disposing a guide having a cylindrical porous material having an opening with a diameter substantially equal to an outer diameter of the mediums, and adjusting gaps between outer circumferential surfaces of the mediums and an inner surface of the guide by forming a fluid film between the inner surface of the guide and the outer circumferential surfaces of the mediums, thereby positioning the mediums.