SU322287A1 - DEVICE FOR SEPARATION SHEETS IN PRINTING MACHINES - Google Patents

Description

A device for separating sheets in printing presses, comprising a piston with suction cups, mounted for movement in a cylindrical chamber of a second cavity, which is mounted in a cylindrical cavity, and a pneumatic actuator are known. In this case, due to the discharge created in the suction cavity, after its contact with the sheet, the lower part of the suction device, compressing the spring, moves upwards. After transferring the sheet to the transporting elements, atmospheric pressure is established in the suction cavity. Under the action of springs, the suction moves to the lower room. In order to avoid bending the back of the sheet separated from the foot and to eliminate the possible displacement of the bottom sheet during the return motion of the suction cup, the latter must be raised. This leads to a complication of the mechanism of suction cups and reduces productivity. In the proposed device, the cylindrical cavity is divided into two separate chambers alternately connected to the pneumatic system using, for example, a spool valve, the pneumatic system contains separate pipelines for sucking the sheet and moving the second piston. The device contains suction cup 2 / with suction cups 2, which are integral with the pistons 3 mounted in a second chamber 4 in a cylindrical chamber. The second piston is mounted in a cylindrical cavity, which is divided into two separate chambers 5 and 5 in this chamber. They are alternately connected to the pneumatic system with, for example, a spool valve. . The pneumatic system contains separate pipes 7, 8 and 9 for sucking the sheet and moving the second piston. Through a pipe 9, at a certain moment of the cycle, a vacuum is created in chamber 5. At the same time, the pistons 4 can be pressed, compressing the spring W. At this time, chamber 6 is connected to the atmosphere. After the suction cups come into contact with the sheets of the spool valve, a vacuum is created in the pipeline 7, and the suction cups, overcoming the resistance of the springs 11, rise. Then the chambers 5 are connected with the atmosphere n simultaneously in chambers 6 through pipe 8 a separation is created. Suction pads 4 move to the top position.

the mechanism; This movement occurs when the pipeline 8 is connected to the atmosphere.

The boom mechanism moves it to the position to separate the sheet, while the pistons 4 are raised. Then the cycle is repeated.

Subject invention

A device for separating sheets in print files containing its piston with spacers installed with the possibility of mixing a second piston in a cylindrical chamber, which is installed in a cylindrical floor, and a pneumatic system, characterized in that, in order to increase productivity, the cylindrical cavity is divided by a second piston into two separate chambers that are alternately connected to the pneumatic system using, for example, a spool valve, the pneumatic system contains separate pipelines for suction of the sheet and stir, yeni second piston.

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