Playback industrial robot provided with a driving device having an electric motor

A playback industrial robot comprising:

• at least one driving device;
• and
• an electric motor provided in said driving device and having a motor shaft;
• said driving device comprising a reduction gear mechanism for reducing a rotational speed of the motor shaft of said electric motor;
• a rotatable output shaft for operating the playback industrial robot;
• a clutch mechanism which is in a disengaged state when said output shaft rotates in a teaching mode so that said reduction gear mechanism does not act as a load;
• a clutch engaging and disengaging mechanism for putting said clutch mechanism is an engaged state depending on supply and cutting off of the supply of compressed fluid when the teaching mode is started;
• a case for accommodating said electric motor, said reduction gear mechanism, said output shaft, said clutch mechanism, said clutch engaging and disengaging mechanism;
• and a rotary position detector for detecting a rotary position of said output shaft,
• said case including a port through which protecting gas is supplied to the inside of said case, and passages for said protecting gas on the inside of said case,
• said clutch mechanism comprising a movable clutch member applied with a rotary force depending on forward and backward rotations of said electric motor and guide members arranged in parallel to said output shaft at positions separated from a center of said output shaft toward an outer peripheral direction of said output shaft, said movable clutch member being provided on said guide members so as to be non-rotatable but movable in an axial direction of said output shaft.