PURPOSE: To increase reinforcement-fixing force by forming a plurality of annu lar projections, in which the diameters of apertures are increased gradually toward base sections from the openings of cylindrical bodies, to the top faces of the inwall surfaces of the half-section cylindrical bodies. ;CONSTITUTION: Openings 3-A, 3-B, into which reinforcements can be fitted movably and respectively, are formed to each cover section 2-A, 2-B at the opening ends of the half-section cylindrical bodies 1-A, 1-B of a sleeve joint. A filler hole 6 and a discharge opening 7 for cement mortar, etc., are formed near both ends of the joint, respectively. A plurality of annular projections 4, in which the diameters D of apertures are increased gradually toward base sections from the openings 3-A, 3-B, are formed onto the inwall sections of the cylindrical bodies 1-A, 1-B while two partition internal surfaces 5 nearer from the openings 3-A, 3-B in the partition internal surfaces 5 are inclined to the major axes of the cylindrical bodies.;COPYRIGHT: (C)1995,JPO
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