storage compartment 25 is equipped with a frame like surround 28 that is formed from strut like sections 29 to 31 of which strut section 29 faces the door 26 and serves to fasten the surround 28 to the storage compartment 25 of the other strut sections 30 31 strut sections 30 run parallel to the side walls 16 of the internal cladding 15 while strut section 31 is provided on that section of the storage compartment 25 that is remote from the door and connects the lateral strut sections 30 to each other in the same manner as is brought about by that strut section 29 that is near the door as can be seen in particular from fig2 strut section 31 remote from the door has on its lateral end sections bearing sockets 32 for the mounting of a bearing spindle 33 that at least to a very large extent is twist proof see also fig3 at its free end sections that protrude with respect to the bearing sockets 32 the bearing spindle 33 is provided with a respective flattened portion 34 see fig4 that interacts in a positive locking manner with a hub 36 sitting in the center of a roller 35 by the positive engagement the rollers 35 that are provided at both ends of the bearing spindle 33 are coupled rigidly to each other in an aligned tooth position through the bearing spindle 33 in a manner secured against twisting in the exemplary embodiment the rollers 35 are fixed axially on the bearing spindle at one end by the lateral edges of the transverse strut 31 and are fixed at the other.