초록 ▼

A drive system for the cutting station in a platen press has four toggle joints supporting the platen and each having a cam follower for moving the toggle joint by an associated rotating cam. The four toggle joints are disposed in pairs perpendicularly to the transport direction of sheets in the pre

A drive system for the cutting station in a platen press has four toggle joints supporting the platen and each having a cam follower for moving the toggle joint by an associated rotating cam. The four toggle joints are disposed in pairs perpendicularly to the transport direction of sheets in the press. The pairs of toggle joints are aligned, with one pair of toggle joints being disposed between the other pair. The toggle joints are connected to a release device controlled by a security coupling. The cams are mounted on a common shaft provided at one end with a braking mechanism. Declutching of the security coupling simultaneously commands operation of each release device and of the braking mechanism.

대표청구항 ▼

In a platen press having a cutting station including a lower movable platen and an upper fixed platen, and a gripper bar means for transporting sheets through said press, a drive means for actuating said lower platen comprising: four toggle joints interconnected between said lower platen and a fixed

In a platen press having a cutting station including a lower movable platen and an upper fixed platen, and a gripper bar means for transporting sheets through said press, a drive means for actuating said lower platen comprising: four toggle joints interconnected between said lower platen and a fixed frame of said cutting station, said toggle joints being disposed in pairs and each pair of toggle joints being aligned on an axis perpendicular to the direction of sheet transport through said cutting station and one pair of toggle joints being disposed between the other pair, each toggle joint having two arms respectively connected by swivel means to said lower platen and said frame and having an axle pivotably connecting said arms; a driveshaft connected to a drive means; a camshaft in driving connection with said driveshaft carrying four cams thereon; four cam followers respectively engaging said four cams, said four cam followers being respectively mounted on said axles of said four toggle joints for inclining said lower platen relative to said upper platen; four compression springs respectively interconnected between said frame and said toggle joints for urging said cam followers against said cams; pulling means interconnected between said frame and said lower platen for urging said lower platen toward said frame in opposition to movement of said lower platen imparted by said toggle joints; two toggle joint release means contained in said frame each having a bearing receiving one of said swivel means of the toggle joints in one of said pairs of toggle joints for immediately retracting said one pair of toggle joints upon actuation of said toggle joint release means such that said pulling means pulls one end of said lower platen toward said frame; a brake means operable on said driveshaft for automatic braking thereof; and a hydraulic control means in hydraulic connection with said toggle joint release means and said brake means for simultaneous actuation thereof.