Quick attachment device for a lifting tractor

A quick attachment device on a lifting tractor, comprising an implement for use in attaching to a tractor to lift material and having two spaced-apart attaching portions disposed in upper and lower relative positions and with said portions presenting confined openings faced toward each other, support arms on said tractor, a pivot pin on said support arms, an attachment member pivotly mounted on said pivot pin and extending thereabove and having two spaced-apart extension portions disposed in upper and lower relative positions and extending away from each other in free ends and with the maximum dimension of the spacing therebetween being less than the maximum dimension of the spacing between said openings of said attaching portions to have said attachment member nest into and extend between said openings of said attaching portions and be movable respectively toward and away from said attaching portions, said free ends being in snug contact in said attaching portions in the nested position, and a spring-urged fastener mechanism releasably interconnected between said implement and said attachment member and having self-fastening portions on a common axis and including a spring-urged pin and opening with their longitudinal axes disposed on said common axis and with said pin being movable into fastening position when said implement and said attachment member are nested together, and with said common axis being arranged to be automatically established when said attachment member is moved relative to said attaching portions in the aforesaid manner, for locking said attachment member to said implement.