Insulated mounting structure with a hard insert

An insulated mounting structure for mounting and supporting a housing of a machine on an installation platform plate from beneath in the vertical direction with tightening both coupling portion of the housing and the installation platform plate by mounting bolts, comprising:

• a plurality of housing brackets provided in the coupling portion of the housing, respectively, wherein each housing bracket has a notch;
• a plurality of installation platform brackets provided at the coupling portions of the installation platform plate, respectively, for receiving each housing brackets from beneath, respectively, wherein each installation platform bracket has a screw hole for passing a mounting bolt;
• a plurality of electrically insulating spacers each having a through hole penetrating in its center, wherein each electrically insulating spacer is positioned and held on the installation platform brackets in a state of fitting into the notches of the housing brackets;
• and
• a plurality of cylindrical collar members made of one of hard resin or metal formed in a cylindrical form having an inside diameter enough for inserting the mounting bolt, wherein each cylindrical collar member is inserted into the through hole of each insulating spacer.