A photo machine with stable paper feeding and electronically controlled pendulum rollers

Abstract

The invention provides a printer with an electrically controlled pendulum roller and a function of stable paper feeding. The printer comprises a rack, a printing body, a winding roller, a winding motor, an unwinding roller and an unwinding motor, wherein the position, at the lower front of the printing body, of the rack is rotationally provided with a front rotating roller, the two shaft ends of the front rotating roller are provided with front cranks respectively, a front tension roller is hinged between the two front cranks, the shaft ends of the front rotating roller and the positions, located at the shaft ends, of the rack are provided with matched first proximity switches; the position, at the lower rear of the printing body, of the rack is rotationally provided with a rear rotating roller, the two shaft ends of the rear rotating roller are provided with rear cranks respectively, a rear tension roller is hinged between the two rear cranks, and the shaft ends of the rear rotating roller and the positions, located at the shaft ends, of the rack are provided with matched second proximity switches. The printer with the electrically controlled pendulum roller and the function of stable paper feeding has the advantages that the design is scientific, paper feeding is stable, the tension rollers are prevented from impacting a printing medium, and the rack is high in structural strength, resistant to bending and high in paper feeding precision.

Description

technical field [0001] The invention relates to the technical field of photo printing machines, in particular to a photo printing machine with stable paper feeding and electronically controlled pendulum rollers. Background technique [0002] Photo printers are generally used in advertising, graphics, and CAD industries. They are large-format printers that use nozzles to spray various color patterns on special materials. The printing medium is generally soft film or special cloth or special roll paper. During the printing process of the photo machine, the printing medium needs to stay on the printing platform for a certain period of time, so as to cooperate with the ink carriage to drive the nozzle to reciprocate on the ink carriage track to ensure that the nozzle is on the ink carriage. The inkjet is uniform on the wide surface of the printing medium. Therefore, the printing medium moves intermittently on the printing platform, and moves to the winding end at a certain lengt...

AI Technical Summary

Problems solved by technology

The printing medium is generally soft film or special cloth or special roll paper. During the printing process of the photo machine, the printing medium needs to stay on the printing platform for a certain period of time, so as to cooperate with the ink carriage to drive the nozzle to reciprocate on the ink carriage track to ensure that the nozzle is on the ink carriage. The inkjet is uniform on the wide surface of the printing medium. Therefore, the printing medium moves intermittently on the printing platform, and moves to the winding end at a certain length at a time, while the movement of the traditional winding and unwinding roller system generally moves at a set speed. Uniform unwinding and rewinding will cause the printing medium to suddenly loosen within a certain period of time during the unwinding and rewinding process, resulting in bending and detaching from the roller surface in the rewinding and unwinding roller system, and the paper is not running smoothly. It is easy to wrinkle when the printing medium is output; in the prior art, there is also a design of adding a tension roller to the retractable roller system. Generally, the tension roller is to rely on its own gravity to apply tension to the printing medium during the movement process, although it can also keep the printing medium tensioned. state, but the tension roller moving in the vertical orbit has a greater impact on the printing medium, which is easy to damage the printing medium; the flatness of the upper and lower surfaces of the printing platform of the general photo machine is not high, and it is easy to appear local protrusions or pits, resulting in the printing medium Indentation occurs after printing; the outrigger structure of the existing photo machine is usually only bolted or directly welded, which is not strong enough and the bending resistance is not high; the general rear pendant and the support structure of the rear pendant are integrally formed frame structure Profiles, the outer end surface of the rear hanger is a paper support structure, which is easily squeezed and deformed during paper feeding, resulting in low paper feeding accuracy

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