Patent ID: 11920696
Assignee: SMC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 2:
3. The gate valve according to claim 1, wherein
the valve assembly is capable of further moving to an intermediate position located between the position occupied by the retracted position and the position occupied by the first and second closed positions in the direction along the axis,
the power transmission mechanism further includes a first spring member and a second spring member provided between the lever member and both the first drive rod and the second drive rod to transmit driving force of the first drive rod to the lever member through the first spring member and to transmit driving force of the second drive rod to the lever member through the second spring member,
the power transmission mechanism further includes a stopper configured to, when the valve assembly reaches the intermediate position from the retracted position by driving of the air cylinder, stop operation of the lever member in the direction along the axis and allow the lever member to be operated in the thickness direction by the opening and closing mechanisms, and
in a state in which the operation of the lever member in the direction along the axis is stopped by the stopper, the opening and closing mechanisms are configured to separately cause the valve assembly to reciprocate between the intermediate position and the first and second closed positions when the first and second drive rods are separately driven.