Cam-type automatic tool-exchanging apparatus having shutter driving mechanism

A cam-type automatic tool-exchanging apparatus comprising:

• a housing;
• an input rotary shaft provided within said housing;
• a rotational-motion converting cam provided within said housing, said rotational-motion converting cam being rotationally driven by said input rotary shaft and outputting a rotational motion;
• a lifting/lowering-motion producing cam provided within said housing, said lifting/lowering-motion producing cam being rotationally driven by said input rotary shaft and outputting a lifting/lowering motion;
• a tool-exchanging arm provided outside of said housing and driven by said rotational motion and said lifting/lowering motion outputted from said cams for performing a tool-exchanging operation;
• a shutter provided outside of said housing, said shutter to be opened/closed in accordance with said tool-exchanging operation of said tool-exchanging arm;
• an opening/closing-motion producing cam provided within said housing, said opening/closing-motion producing cam being rotationally driven by said input rotary shaft and outputting a shutter-opening/closing pivotal motion for opening/closing said shutter;
• a shutter-driving rotary shaft provided within said housing, said shutter-driving rotary shaft outputting said shutter-opening/closing pivotal motion of said opening/closing-motion producing cam from inside of said housing to the outside;
• a pivotal arm, said pivotal arm
• being pivotally supported on said housing,
• having on one end a cam follower engaging with said opening/closing-motion producing cam, and
• having on the other end a sector gear;
• and
• a driven gear provided on said shutter-driving rotary shaft and meshing with said sector gear,
• wherein said shutter-opening/closing pivotal motion of said opening/closing-motion producing cam is transmitted to said shutter-driving rotary shaft.