Floating joint

A floating joint comprising:

• a fixed base;
• a movable base;
• a floating mechanism that floatingly supports the movable base swingably with respect to the fixed base;
• and
• a locking mechanism that fixes the movable base in a state of not being swingable with respect to the fixed base,
• wherein
• the floating mechanism includes
• a spherical bearing having a spherical surface, and
• a spherical washer part that supports the spherical surface slidably, the locking mechanism is provided in an inner part of the spherical bearing,
• the locking mechanism includes
• an inner cylinder that is coupled and fixed to the movable base,
• an intermediate cylinder that covers an outer periphery of the inner cylinder,
• an outer cylinder that covers an outer periphery of the intermediate cylinder and that is coupled to the fixed base, and
• an elastic member that couples the intermediate cylinder and the movable base,
• the intermediate cylinder is provided in a manner of being relatively movable in an axial direction of the intermediate cylinder with respect to the inner cylinder and the outer cylinder, and
• an outer peripheral surface of the inner cylinder and an inner peripheral surface of the intermediate cylinder have step parts engaged with each other.