case within a lateral frame part 5 1 5 2 a lateral auxiliary frame 12 1 12 2 can be pivoted upward and outward in an illustrated x direction here in particular as is the design in the exemplary embodiment of the present invention according to fig2 c the drive cylinder 3 with integrated electric drive as a motor and or gearing unit is seated at the end side on the auxiliary frame 12 1 the drive roller 4 is seated coaxially on the drive cylinder 3 in the above described manner and is preferably rotationally fixedly connected to the drive cylinder 3 at the outside the drive roller 4 is provided with a coating rubber lining or the like which comes into direct contact with an item of freight to be transported in particular freight container the drive roller 4 is supported and mounted on the auxiliary frame 12 2 by means of a bearing element 14 here in the present invention it has proven to be particularly advantageous for a bearing receptacle 15 to be pivotable in particular swivelable about a joint 16 out of the end side region of the drive roller 4 after the removal of a retaining shaft 17 as illustrated in fig2 c it is possible after the auxiliary frame 12 1 12 2 has been swiveled out of the frame for the retaining shaft 17 to be removed from the drive roller 4 and the bearing receptacle 15 or from the bearing element 14 after which it.