Toggle press
AssigneeGloucester Engineering Co., Inc.
InventorCharles M. Schott, Jr.
Life of this patent
Estimating the term…
Abstract
A toggle press having a lower platen assembly constructed to provide a convenient working level for the platen in its open position. The fixed axis of the toggle linkage is mounted immediately adjacent to the ground and the actuator for the toggle linkage is inclined in the direction downwardly progressing away from the toggle actuating axis. The press is constructed with a beam which includes a base plate, this base plate having an extension upon which the fixed pivot of the toggle linkage is mounted, below the neutral axis of the beam. Additional structural features enable compensating deflection and self-alignment of the toggle bearing under load.
Claims11
A toggle press of the type comprising at least a lower platen mounted to move on guides of a frame between an open position accessible to a worker on the ground and a closed position in response to a toggle linkage, the toggle linkage comprising frame and platen links connected at pivots respectively on the frame and platen, the line between said pivots being parallel to the direction of said guides, said links joined at an intermediate actuating axis to which is also connected an actuator mounted on its other side to a second, reaction-force-absorbing linkage, said platen having a working face directed upwardly, the toggle linkage adapted to raise said platen to close said press,said second linkage comprising a lever and a link, said lever pivoted at one end at a fixed axis to the frame and at its other end to one end of said link, the other end of said link pivoted to the platen in the vicinity of said platen axis, said actuator extending between said toggle actuating axis and a reaction point located in the mid-region of said lever between its said end pivots, the improvement comprising the geometrical relationship of pivot axes providing enhanced actuator-to-toggle force ratio at toggle-open position without applying detrimental side loading on the platen, wherein said fixed axis of said lever is located in the direction perpendicular to the axis of said guides, closer to said line between centers of said frame and platen toggle axes than to the line between centers of said reaction point and the axis joining said link to said lever, and the line of action of said actuator, in the open position of said toggle, being inclined to the line bisecting the toggle angle defined at the actuating axis by the frame and platen toggle links, said inclination being in the direction downwardly progressing away from said toggle axis, toward the ground, and the fixed axis for the frame link of the toggle linkage being immediately adjacent to the ground, thereby enabling said open position to be at a convenient height to said worker.
A toggle press of the type comprising at least a lower platen mounted to move on guides of a frame between an open position accessible to a worker on the ground and a closed position in response to a toggle linkage, the toggle linkage comprising frame and platen links connected at pivots respectively on the frame and platen, the line between said pivots being parallel to the direction of said guides, said links joined at an intermediate actuating axis to which is also connected an actuator mounted on its other side to a second, reaction-force-absorbing linkage, said platen having a working force directed upwardly, the toggle linkage adapted to raise said platen to close said press, and wherein said press includes a base beam including a base plate and upper stiffening structure extending in the direction of the width of the press (i.e., transverse to the direction of travel of material entering the press), said base plate having an extension extending in the direction of said travel beyond said stiffening structure, the pivot on said frame for said frame link being supported on said base plate extension below the neutral axis of said beam.
Dependencies are inferred from the claim text.