bevel gear transmission is provided in a manner only indicated in dotted lines in the profile 133 it permits a transmission to all screw bolts 167 that may be arranged together with a respective bearing block assembly along the width of the awning by a shaft to be driven about a geometrical transverse axis 137 this transverse axis 137 extends to the left of fig1 the screw bolt 167 emerges from the profile 133 in a median plane 138 and has on its top a bevel gear meshing with similar bevel gear of the shaft in the profile 133 an annular collar 139 is provided on the screw bolt 67 above the u profile 46 it pentrates a bearing plate 141 attached rigidly to the transverse yoke arc of the u profile 46 the bearing plate 141 absorbs the tensile and shear forces occurring in the screw bolt 67 and nevertheless permit the screw bolt 67 to be pivoted about the axis 137 from the position shown in fig1 into one substantially higher the body 132 which is provided rigidly between the fork cheeks 74 77 vide fig1 has in this embodiment the configuration of a tube in which a tube.