Paper pickup device of paper feeder for stenograph

Abstract

The invention discloses a paper feeding and pick-up device of a stenograph. The device comprises a base, a set of pick-up rollers, a bracket and a support plate, wherein, the bracket is fixedly connected on the base, the side wall of the bracket is provided with a long guide hole, the planes of two equidirectional bending ends of the bracket are parallel with each other, and the two bending ends are respectively provided with a guide hole, the two ends of the support plate are fit in the two guide holes of the bending ends of the bracket in a sliding way; a fixed shaft is arranged under the support plate, the base is provided with a cam component which can rotate around the axis; a pressure regulating component is fit in the long guide hole in a sliding way, the lower end of the pressure regulating component props against the cam profile of the cam component, the upper end of the pressure regulating component is connected with one end of an elastic piece, and the other end of the elastic piece is connected with the fixed shaft under the support plate; the upper end of the support plate is provided with a slitter component, and the slitter component is fit with the upper end of thesupport plate in a clearance way.

Description

technical field [0001] The invention relates to the field of office equipment, in particular to a paper pick-up device used in a quick-printing machine to cooperate with a pick-up wheel to feed printing paper into a secondary paper feed unit and to initially separate the paper, specifically to a quick-printing machine. A paper feed pickup device of the machine. Background technique [0002] As we all know, a speed printer includes a paper feed unit and a second paper feed unit. The first paper feed unit and the second paper feed unit are not literally a paper feed unit and two paper feed units, but a speed printer The first and second feeding units are common in the industry. [0003] With the advancement of science and technology, the degree of automation of office equipment is also getting higher and higher. Speed ​​printers are favored by the majority of users for their large and fast printing performance. At present, the speed printer has strict requirements on the sur...

AI Technical Summary

Problems solved by technology

Its structure is generally that the pickup position of the pickup roller is fixed, and the support of the paper separation sheet seat is a swing rod type spring holding structure, and its structural assembly is relatively complicated, and this structure has certain shortcomings in practical applications: because its pickup The size of the pressure is pre-set by the elastic element during assembly, and the pickup pressure cannot be adjusted during the whole use process, so when processing the same specification of paper each time, as the height of the paper changes, the pickup roller’s impact on each sheet of paper will increase. The friction force of paper pickup is different, it is easy to cause double sheets or double-sheet phenomenon; when using thick paper for printing, the paper pickup pressure is too small, and the paper pickup roller cannot rub the paper into the secondary paper feed unit

[0005] In the actual printing operation, there are the following situations that need to adjust the pickup pressure to meet the needs of the speed printer for paper, such as: due to the newness of each batch of paper, the quality of surface wrinkles, weight, size and compaction between paper There are differences. When the speed printer encounters this situation, the standard rubbing friction often cannot meet the best rubbing effect; for example, for thin and small-format paper, it is easy to cause double Sheets, paper or folds or even tears; for thick and large paper (such as 125 g / M 2 (above A3 format), it may cause skewing, paper jamming, paper slipping or even no rubbing at all due to insufficient pickup pressure, which will affect the printing speed and cause a certain degree of damage to the original document

Due to the long-term processing of a large number of documents and the wear of the current pickup roller, the pickup pressure will change, and this change usually manifests as insufficient pickup pressure and slippage of the pickup, which will affect the printing quality.

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