Conveyance device

A conveyance device comprising:

• a fixed base including a first gear serving as an external gear;
• a turning body supported by the fixed base via a bearing;
• two or more servomotors configured to rotate the turning body relative to the fixed base;
• a conveyance arm configured to be able to convey a workpiece by turning in conjunction with the turning body;
• and
• two or more speed reducers fixed to the turning body and respectively connected to the two or more servomotors, wherein:
• the two or more servomotors are fixed to the turning body;
• the conveyance arm is fixed to the turning body;
• each of the speed reducers includes a housing integrated with the turning body, wherein the housing has a cylindrical shape that opens at its top and bottom, and has a lower end placed and fixed to the turning body, and the servomotor is placed on an upper end of the housing and fixed to the upper end, a planetary carrier rotatably supported inside the housing, an internal gear provided inside the housing, a sun gear connected to an output shaft of the servomotor, a plurality of planetary gears arranged around the sun gear and rotatably supported by the planetary carrier, and an output gear configured to rotate integrally with the planetary carrier;
• the planetary gear meshes with the sun gear and with the internal gear;
• and
• the output gear has a smaller diameter than a diameter of the first gear and meshes with the first gear outside the first gear.