Patent ID: 8640567

Claim:
A steering column device, comprising: a male screw shaft member rotatably supported by any one of a fixed side bracket and a movable side bracket and provided with a male screw portion extending in an axial direction of the male screw shaft member; and a female screw member provided on the other one of the fixed side bracket and the movable side bracket, wherein the movable side bracket is movable relative to the fixed side bracket in such a manner that the female screw member is moved relative to the male screw shaft member by rotating the male screw shaft member, wherein the female screw member comprises: a casing having a nut container formed of a through hole; a pair of nuts inserted into the nut container so as to be movable in an axial direction of the nut container and not to be rotatable in a circumferential direction of the nut container, the nuts each having a female screw portion through which the male screw shaft member passes while threadedly engaging with the female screw portion; and a wedge member having a tip end in a tapered shape and being disposed so as to be held by the casing at an inner side surface of the nut container so that the tip end of the wedge member is located between the pair of nuts, thereby the pair of nuts are separated from each other in the axial direction of the male screw shaft when the tip end of the wedge member is inserted between the pair of nuts, and outside surfaces of the female screw portions of the respective nuts come into contact with the male screw portion of the male screw shaft member and the outside surfaces of the female screw portions of the respective nuts get held by the male screw portion of the male screw shaft member, and wherein the pair of nuts are held in the nut container by the casing by means of the wedge member in a state where the pair of nuts are regulated from moving in the axial direction of the nut container.