the transfer and takeover position is defined in relation to the conveyor track 26 32 the locking device 24 shown in fig4 and 8 is formed by locking elements 45 46 on the frame magazine 16 19 and on the clamping frame 6 9 which can mesh with one another in a positive locking manner the locking elements 45 on the frame magazine 16 19 are driven in a controllable manner they can possibly move the clamping frame 6 9 somewhat during the locking the locking elements 45 are configured e g as pivotable grippers these mesh with pin or roller like locking elements 46 on the clamping frame 6 9 which said locking elements are arranged there e g on transversely projecting extension arms the arrangement may also be reversed further media couplings 47 may be present at the magazine places between the frame magazines 16 19 and the received clamping frames 6 9 they comprise e g each a coupling element 48 at the magazine place and a coupling element 49 at the clamping frame 6 9 which are present as a single element or as a plurality of elements and are arranged at the edge the coupling elements 48 49 may be used in addition as a mechanical peg for the clamping frames 6 9 at the magazine place the media couplings 47 may transmit operating materials e g fluids power and or signal currents as a result movable clamping positioning and support devices of the clamping frames 6 9 can be activated and locked.