Tube joint

摘要

An object of the present invention is to provide a tube joint, which is capable of properly limiting the degree of biting a tube. In the tube joint of the present invention, an inner section of a collet is divided into a plurality of engage pieces, each of which has a nail section capable of biting the tube. An inner tapered face section is formed on an inner wall of a joint proper. Diameter of the inner tapered face section is made greater toward an inner part. The inner tapered face section is capable of reducing diameter of the engage pieces when the collet is pulled outward. An elastic ring is capable of moving outward with rising fluid pressure in the joint proper. A tapered ring is capable of bending the engage pieces radially outward when the collet is pushed axially inward and bending the same radially inward when the collet is pulled axially outward.