Patent ID: 8468908

Claim:
An industrial robot having a joint, wherein the joint includes a first member and a second member rotatable relative to the first member, wherein the first member includes a first hole provided in the first member, the first hole being provided with a screw hole at a bottom of the first hole, and a first positioning member contained in the first hole, the first positioning member being slidable through an inside of the first hole and projectable from the first hole, the first positioning member having a screw directly fixed to one end thereof, wherein the first hole and the first positioning member are arranged such that there is no mechanical backlash between the first hole and the first positioning member, wherein the screw of the first positioning member is screwed into the screw hole of the first hole such that the first positioning member is attached to the first hole, wherein the second member includes a contacting portion arranged to contact the first positioning member when the first positioning member is projected from the first hole, wherein the first positioning member includes a retainer for a lubricant on a side thereof, and wherein the first positioning member is mounted within the first hole so as to be movable between a position in which an entirety of the first positioning member is arranged within the first hole, and a position in which the first positioning member projects from the first hole, while remaining attached at the bottom of the first hole by the screw and the screw hole.