Gate valve apparatus and semiconductor manufacturing apparatus

A gate valve apparatus comprising:

• a housing having an opening;
• a valve body configured to open and close the opening;
• and
• a drive portion configured to drive the valve body,
• wherein the drive portion includes:
• a first crankshaft including a first input shaft rotatably supported by a side wall of the housing and a first output shaft rotatably supported by the valve body;
• a second crankshaft including a second input shaft rotatably supported by the side wall of the housing and a second output shaft rotatably supported by the valve body;
• a rotation transmission portion configured to transmit rotation of the first input shaft to the second input shaft, the rotation transmission portion including:
• a first timing pulley attached to the first input shaft;
• a second timing pulley provided to the second input shaft;
• and
• a timing belt connecting the first timing pulley to the second timing pulley, the rotation transmission portion synchronizing rotation of the first input shaft and the second input shaft;
• and
• an actuator connected to the first input shaft to rotate the first input shaft to cause the valve body to move along an arc to open and close the opening.