A system for moving physically stored data in a distributed, virtualized storage network is disclosed. The guide rails are connected with the shaft wall by means of yokes, whereby the vertical rail forces are conducted into the shaft pit. The follower member would not move any further because the follower member is restricted by an upright wall of the sheet-feeding base. Selection of a damping force map according to the frequency and amplitude of the vertical acceleration is also made when a change in the vertical acceleration, i.