Device for connecting telescoping pipes

A device for interconnecting a large-diameter pipe and a small-diameter pipe inserted in one end thereof comprising a plurality of drawing means each having an engaging portion engageable with an outer peripheral projection on the large-diameter pipe, an annular member holding the drawing means and fittable around the small-diameter pipe, a plurality of pressing members interposed between the inner surface of the annular member and the outer surface of the small-diameter pipe and each having a wedge projection, said pressing members being inserted in recesses formed in the inner surface of said annular member, and a substantially circular ring-like retaining member for preventing removal of the pressing members from the annular member when the device is not in use, said circular ring being fitted in grooves formed in the inner surface of the pressing members and in grooves formed in the inner surface of the circular member, at least one of the inner peripheral surfaces of the annular member and the outer peripheral surface of each of the pressing members being in the form of a slanting surface for causing the pressing member to move toward the outer peripheral surface of the small-diameter pipe and to thereby force the wedge projection against the outer peripheral surface of the small-diameter pipe by the movement of the annular member toward the large-diameter pipe when the annular member is drawn toward the large-diameter pipe by the drawing means, said grooves and the retaining member being dimensioned to permit relative movement between the annular member and the pressing members when the annular member is drawn toward the large-diameter pipe when the device is put to use.