Patent ID: 10190721

Abstract:
A spacer is inserted in a gap between an existing pipe and a rehabilitation pipe to adjust the position of the rehabilitation pipe inside the existing pipe. The spacer comprises first and second wedge-shaped members each having an inclined surface of the same inclination angle and being overlapped with the inclined surfaces thereof overlapped. Latching teeth are formed in the inclined surfaces of the first and second wedge-shaped members so that the second wedge-shaped member is movable relative to the first wedge-shaped member in the insertion direction of the spacer to stepwise increase an overall height thereof, but immovable in the reverse direction. Either one of the first and second wedge-shaped members is provided at the engaging teeth portions with an elastic deformable member that can be elastically deformed to disengage the latching teeth of the first and second wedge-shaped members to enable movement of the second wedge-shaped member in the reverse direction for re-adjustment of the position of the rehabilitation pipe inside the existing pipe.