SU75420A1 - The mechanism of acceptance of paper double-turn printing machines - Google Patents

Description

The mechanisms for accepting paper from double-turn printing presses, including a belt conveyor for receiving paper sheets from the image drum, which are then intercepted by a chain conveyor with valves that spread the sheet onto the receiving table, are already known. Mechanisms are also known in which the belt conveyor, which receives sheets from the printing drum and transmits them to the chain conveyor, has more rapid movement along. compared with the latter and is equipped with a device for braking the sheet.

The proposed paper acceptance mechanism for double-turn masking machines differs from the known ones in that the braking device is designed as levers mounted between the conveyor belts of the slats, alternately lifting the sheet above the conveyor belts by means of a cam drive.

The drawing shows a diagram of such a mechanism.

During printing, the sheet is on the image drum. After the leading edge of the printed sheet passes under the discharge rollers 2, the drum valves open and

The released sheet goes to the terminal strips 3, which are at this time in the lower polishing.

Lifting and lowering of the bars 3 is carried out from the mechanism opening and closing the valves of the drum by means of tie 4, lever 5, pull 6 and lever 7.

From the slat sheet goes to the ribbon 8 of the first conveyor. The speed of movement of the ribbons is equal to the circumferential speed of the printing drum, since the rotation of the drive roller 9 is transmitted from the gear of the drum through the parasitic gear W.

During the two-senn sheet on the ribbons of the first conveyor, the brake rails 11 are lowered and are below the level of the bands, due to which the sheet freely passes on the bands. At the end of this movement, the bars 11 are raised and the sheet is lifted above the ribbons, as shown in the diagram.

The sheet continues to move along the bars // by inertia, while its speed slows down and it smoothly approaches the valves 12, which capture the sheet.

The valves 12 are mounted on a chain conveyor 13, which moves continuously in one direction. Its speed is 3.14 times.

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less speed than first transp. Movement to the second transceiver is transmitted by means of chain 14 from the main or longitudinal shaft of the gear (depending on the structural arrangement).

The second conveyor carries the sheet and lowers it to the receiving table 15. At the moment when the rear edge of the sheet comes to the end of the first conveyor, the slats 11 quickly lower and thereby give free passage to the next sheet. . The lifting and lowering of the brake strips 11 is effected from the eccentric 16 sitting on the main shaft of the machine; movement is transmitted through lever 17, lower link 18, double-arm lever 19, vertical link 20 and lever 21.

The slats are fixed on the levers 22 and 23, which ensures their movement in parallel. Screw 24 is used to adjust the top polo 1 -ir-r

pads //, and copiers 25 and 26 for closing and opening the chain conveyor valves.

The mechanism for accepting paper of double-turn printing machines, including the belt conveyor for receiving paper sheets from the image drum, then intercepted by a slow motion chain transnorter spreading the sheets on the receiving table, using a braking device on the belt braking for sheet braking, characterized in that the brake device in the form of slats mounted on the levers between the conveyor mites, alternately lifting the sheet above the conveyor belts by means of a lever to lachkovo | -o drive.

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