DISPOSITIF POUR ECARTER L'UNE DE L'AUTRE DEUX BUTEES AVEC UNE GRANDE FORCE, EN PARTICULIER POUR LES CISAILLES OU PRESSES

摘要

Two abutments are adapted to approach each other and to be forced apart in a predetermined direction. Each of said abutments has a confronting surface, which faces the other abutment. An arrangement for forcing said abutments apart comprises two outer rolling elements, each of which is rigidly connected to one of said abutments at said confronting surface thereof and extends transversely to said predetermined direction, a central rolling element which is movable transversely to its axis and to said predetermined direction, two intermediate rolling elements, each of which connects one of said outer rolling elements to said central rolling element, and drive means operable to displace said central rolling element transversely to its axis and to said predetermined direction. All said rolling elements have parallel axes. The arrangement is such that any two adjacent ones of said rolling elements roll one on the other in response to a displacement of said central rolling element.