Conveying device

A conveying device comprising:

• a conveying arm assembly;
• a fixed shaft;
• a set of hollow operating shafts connected to the conveying arm assembly for controlling an operation of the conveying arm assembly;
• and
• a motor provided between the fixed shaft and each of the operating shafts,
• wherein an end of the fixed shaft is attached to an inner face of a wall portion of a vacuum chamber with airtightness,
• the set of operating shafts are attached to the fixed shaft such that they can be rotated coaxially with respect to the fixed shaft on an outside of the fixed shaft and are arranged in an axial direction of the fixed shaft to define at least a proximal operating shaft attached closer to a fixed end of the fixed shaft and a distal operating shaft attached farther from the fixed end of the fixed shaft,
• the conveying arm assembly is attached to end portions of the proximal and distal operating shafts being situated closer to the fixed end of the fixed shaft and extending from the end portion of the proximal operating shaft being situated closer to the fixed end of the fixed shaft in a direction substantially orthogonal to the fixed shaft, and
• the motor comprises a stator provided on the fixed shaft and a rotor provided on each of the operating shafts such that the rotor is opposed to the stator on an outside of the stator, and the stator is accommodated in a concave portion formed on an outer peripheral face of the fixed shaft.