Steering column clamping apparatus

摘要

A steering apparatus includes an inner column (11) which rotatably supports a steering shaft (S); an outer jacket (21) which incorporates the inner column (11) shiftably in an axial direction, at least a portion of the outer jacket (21) being cylindrical; and a clamping member (14) for clamping the inner column radially. The outer jacket (21) includes a flange (21d) which extends in a direction leaving an axial line of the outer jacket from the cylindrical outer periphery of the outer jacket and is urged by the urging member (14), and a slit (21e) which extends in the axial line direction to cross the flange. Assuming that the center of the slit is at an angle of 0°, the average thickness of the outer jacket to the tip of the flange within a range from 90° to 135° around the axial line of the outer jacket is larger than that within a range from 135° to 180°.