Printing machine with self-weight falling and loss prevention

Abstract

The invention discloses a printing machine with self-weight falling and loss prevention. The printing machine includes a machine frame, a press printing roller lifting device and a printing roller lifting device. The press printing roller lifting device includes a rectangular upper support block and an H-shaped press printing roller lifting bracket. Main driving racks are formed on the left and right end faces of the upper support block. A pair of left-right symmetrically arranged central gears are pivoted between the front and rear sidewalls of an upper lifting groove. The pair of central gears are located on the left and right sides of the pair of main driving racks and the central gears are engaged with the main driving racks of the corresponding grooves. The press printing roller lifting bracket is arranged in the upper lifting groove in a lifting manner. Driven racks are formed on the opposite end faces of the upper parts of a pair of vertical parts of the press printing roller lifting bracket. The pair of driven racks are located on the left and right sides of the pair of central gears and the driven racks are engaged with the central gears of the corresponding sides. The weight of the upper support block is greater than the sum of the mass of the press printing roller and the press printing roller lifting bracket. According to the invention, the printing quality is ensured and the service life of the printing machine is improved.

Description

technical field [0001] The invention relates to the technical field of printing equipment, in particular to a printing machine capable of falling and preventing damage due to its own weight. Background technique [0002] Some paper cutters preliminarily cut the printed paper, then arrange and stack the cut paper, and then further cut the stacked paper, so the work efficiency is low. [0003] The embossing mechanism of the gravure printing machine in the prior art is mainly divided into a direct pressure type and a swing type, wherein the direct pressure type imprinting mechanism mainly pushes the embossing roller to move up and down through two cylinders arranged at both ends of the embossing roller, thereby Realize imprinting and release action. At that time, the embossing mechanism had the following disadvantages: 1. Since the up and down movement of the embossing roller was completed by two different cylinders, it was easy to cause the down movement of the two ends of th...

AI Technical Summary

Problems solved by technology

At that time, the embossing mechanism had the following disadvantages: 1. Since the up and down movement of the embossing roller was completed by two different cylinders, it was easy to cause the down movement of the two ends of the embossing roller to be out of sync, which would affect the embossing of the printing machine. Quality; 2. When the printing machine fails or the power is cut off, the piston rod of the cylinder will drop under the gravity of the embossing roller, and the embossing roller will press on the printing roller. The long-term pressing of the embossing roller will cause the printing tube to bend Even damaged, which seriously affects the normal operation of the printing press

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