US 5,275,105 AGranted

Rotary printing machine equipped with an exchangeable cylinder

AssigneeBobst SA

InventorsMartin Schweizer, Charles Stark

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Abstract

A rotatable printing machine includes a horizontal exchangeable cylinder which is held between two sidewalls of a machine frame by a holding and driving arrangement which enables disengagement. To remove the cylinder, a carriage arrangement is positioned in the frame and can include a movable trolley for receiving the cylinder and sliding it in a horizontal plane onto a hand cart. One embodiment includes a movable table for raising and lowering the cylinder from the path of the trolley to the operating position. Another embodiment positions rails for the trolley immediately underneath the operating position of the cylinder and includes an arrangement for raising and lowering supports for the cylinder relative to the cylinder. A third embodiment includes a fixed track mounted immediately adjacent the cylinder and utilizing position adjustment means for the drives of the cylinder to lower the cylinder onto the track.

Claims14

Dependent claims

In a rotary printing machine including a frame having a pair of side wall members, an operating axis extending between the pair of side wall members, holding and driving means for disengageably positioning an exchangeable cylinder in the frame of the machine in a cylinder operating position with a cylinder axis coinciding with said operating axis of the machine, the improvement comprising transfer means for moving a cylinder into and out of the frame, said transfer means including carriage means being positioned to transport a cylinder in a substantially horizontal plane in a direction extending perpendicular to the operating axis, said carriage means including a trolley having two end members interconnected at one side of the trolley by a rigid connection to form a center free of structure, said carriage including two rails and means for mounting the two rails in the frame opposite each other and adjacent the two side walls of the machine to extend perpendicular to the operating axis, each of said rails supporting one of said end members of said trolley, each end member of the trolley being provided on an upper surface with a cylinder support element, said transfer means including means to obtain a relative movement in a vertical direction between the cylinder operation position and the trolley to enable engagement of the cylinder while in the operation position by the carriage means and transfer to the cylinder support elements of the trolley with a release of the cylinder by the holding and driving means, said transfer means including a workshop cart positioned at one end of the rails of the carriage means for receiving the cylinder and means for transferring the cylinder from the carriage means to the cart.

In a rotary printing machine including a frame, holding and driving means for disengageably positioning an exchangeable cylinder in a cylinder operating position on an operating axis in the frame of the machine, the improvement comprising transfer means for moving a cylinder into and out of the frame, said transfer means including carriage means being positioned to transport a cylinder in a substantially horizontal plane in a direction extending perpendicular to the operating axis of the cylinder, said transfer means including means to obtain a relative movement in a vertical direction between the cylinder operating position and the carriage means to enable engagement of the cylinder while in the operating position by the carriage means, so that after engagement on the carriage means, the cylinder is released by the holding and driving means, and then is subsequently removed in said direction perpendicular to the operating axis, the machine frame including two side members interconnected by crossbars positioned below the operating position of the cylinder, said carriage means including two vertical members mounted on said crossbars adjacent the side frame members and facing each other, two horizontal bars secured on the ends of said two vertical members and protruding from the frame, each of said two horizontal bars being provided with a stop plate at each end, a horizontal crossbar member extending between said horizontal bars and said means for a relative vertical member including jack members secured to the means for holding and driving the cylinder for raising and lowering said cylinder relative to the carriage means, said transfer means including a workshop cart positioned at one end of the two horizontal bars to receive the cylinder engaged with the stop plate, said cart having means for lifting the cylinders off said horizontal bars.

Dependencies are inferred from the claim text.