Gate valve

A gate valve configured to press a valve element that includes a seal member to an opening surface where an opening that communicates with a processing part of a processing device that performs processing in vacuum thus sealing the opening, the gate valve comprising:

• a housing;
• a perpendicular moving body being held in the housing and being movable in a perpendicular direction to the opening surface;
• and
• a perpendicular operation mechanism disposed between the housing and the perpendicular moving body,
• the perpendicular moving body includes:
• a moving body configured to move integrally with the valve element;
• a lift body configured to move together with the moving body in an intersecting direction that intersects with the perpendicular direction;
• a drive source configured to make the lift body move in the intersecting direction, and
• a lift operation mechanism disposed between the lift body and the moving body,
• the lift body is configured to be movable in the intersecting direction between a first operation region where the lift body moves in the intersecting direction together with the moving body by way of the lift operation mechanism and a second operation region where, in a state where the movement of the moving body in the intersecting direction is restricted, the lift body is further moved in the intersecting direction by operating the perpendicular operation mechanism, and
• the perpendicular operation mechanism is configured, along with the movement of the lift body in the intersecting direction in the second operation region, the perpendicular moving body is further moved in the perpendicular direction,
• the perpendicular moving body includes:
• a restricting member configured to restrict movement of the moving body in the intersecting direction in the second operation region;
• and
• a first engaging member configured to engage with the perpendicular operation mechanism,
• the perpendicular operation mechanism is a link mechanism, and includes:
• a tension link body having one end portion thereof rotatably and pivotally connected to the housing;
• a follower link body having one end portion thereof relatively rotatably connected to the tension link body and having an other end thereof engage with the first engaging member;
• and
• a prime mover link body having one end portion thereof connected to at least either one of the tension link body and the follower link body,
• the lift body includes a second engaging member configured to engage with the prime mover link body, and
• the link mechanism is configured to perform, in the second operation region, configuration displacement between the tension link body and the follower link body by displacing the prime mover link body by way of the second engaging member.