Housing type pipe joint

A housing type pipe joint that connects a pair of pipes including a concave or convex mounting portion at an end thereof, the joint comprising:

• a plurality of housing bodies, each of which includes an arc-shaped portion, a flange portion that is formed at each circumferential end of the arc-shaped portion and protrudes radially outward, a pair of engaging portions that are arranged respectively on an axially-extending inner surface of the arc-shaped portion and engage respectively with the mounting portion of the pipe, and a concave portion that defines an interior space of the arc-shaped portion along the axial direction between the pair of engaging portions;
• an annular gasket that is formed from an elastic member and is accommodated in the concave portion of the housing body;
• and
• a fastener that fastens the housing bodies at the flange portions, wherein
• the gasket includes a cylindrical body portion, a pair of gasket lip portions that extend radially inward from both axial-end sides of the body portion, and a pair of gasket tongue portions that extend radially inward from an inner surface of the body portion along the axial direction between the pair of gasket lip portions, an outer surface of the gasket lip portion is tightly attached to an outer surface of the pipe, and is capable of sealing the outer surface,
• in a state where no load is applied to the gasket, distal ends of the pair of gasket tongue portions are spaced apart from each other in the axial direction, and
• when the distal ends of the pair of gasket tongue portions are pressed to be close to each other in the axial direction, the body portion is deformed about a vicinity of base ends of the pair of gasket tongue portions, and due to this deformation, the pair of gasket lip portions rotate, and an angle of the outer surface of the gasket lip portion relative to the axial direction becomes smaller.