Swing seat adapter

In combination with a swing of the type including an elongated horizontal transverse seat suspended at its opposite ends from the lower ends of a single pair of dependingly supported suspension members including anchor means at their lower ends anchored to said seat ends, an adapter for said seat including front, rear and opposite side marginal portions and incorporating a pair of laterally spaced upstanding sides extending between said front and rear marginal portions, an upstanding transverse rear wall structure extending and secured between the rear marginal portions of said sides, said adapter being downwardly and removably seated upon said seat between the lower ends of said suspension members, retaining means operatively removably coupled between upper portions of said sides and adjacent portions of said suspension members spaced above said seat and above said anchor means for preventing the seat from excessive forward or rearward tilting, and occupant restraining harness structure carried by said adapter operative to releasably secure a child within said adapter and seated on said seat.