Fluid passage connection device

A fluid passage connection device comprising a first coupler fitted to a stationary base member and a second coupler that can be connected to the first coupler and that is fitted to a movable member, constituted so as to connect and separate a fluid passage through the first coupler and the second coupler, comprising:

• a positioning mechanism for positioning the movable member with respect to the base member, so that it becomes possible for the first coupler and the second coupler to connect together;
• and
• a clamping mechanism that clamps the movable member with respect to the base member, with an elastic force of an elastic member or an enclosed compressed gas, and that releases this clamping with a fluid pressure of a fluid pressure cylinder;
• the first coupler comprising a connection member that is provided so as to be shiftable in its axial direction and connects a fluid passage in an engaged state with the second coupler, a spring that elastically biases the connection member so as to project, and a fluid pressure operation chamber that applies a fluid pressure to drive the connection member so as to retract;
• and
• wherein a fluid passage is provided in the base member, making an unclamping fluid chamber of the fluid pressure cylinder communicate with the fluid pressure operation chamber;
• and
• further comprising:
• an air nozzle for detecting seating and a fluid pressure type clamp device is provided to the movable member;
• and
• as the fluid passage that is connected and separated, there are provided two fluid pressure passages of two systems for the fluid pressure type clamp devices, and one air passage of one system for an air nozzle.