Paper pressing device and digital printer

Abstract

The embodiment of the invention provides a paper pressing device and a digital printer. The paper pressing device comprises limiting pressing strips and gap adjusting assemblies. The limiting pressing strips are assembled on the two sides of a printing base material conveying path of the digital printer through supporting pieces respectively and are parallel to the printing base material conveying path and are suspended above the positions, close to the edges of the two sides, of a bearing platform in the printing base material conveying path; the gap adjusting assembly is arranged between the supporting pieces and the limiting pressing strips and used for adjusting the height of a paper pressing gap formed between the bearing surface of the bearing platform and the limiting pressing stripes to be matched with the thickness of a single printing base material; the gap adjusting assembly comprises a connecting frame fixed to the supporting piece and provided with a first penetrating hole, a fixed block fixed to the limiting pressing strip and provided with a first screw hole and an adjusting bolt with the threaded end penetrating through the first penetrating hole and then screwed into the first screw hole, and the axial direction of the adjusting bolt is perpendicular to the bearing surface. According to the paper pressing device and the digital printer, a warped edge of the printing base material can be effectively and flatly attached to the bearing platform.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of digital printers, in particular to a paper pressing device and a digital printer. Background technique [0002] Printing substrates (such as cardboard) usually form warped edges during movement and transportation. When printing substrates with warped edges are supplied to digital printers for printing, the warped edges usually cause interference to the printer, and the printing effect is relatively poor. In severe cases, it may even damage the printer. [0003] In order to improve the printing effect on the printing substrate with warped edges, an existing digital printer usually uses a suction platform to carry the printing substrate, and the negative pressure is formed between the printing substrate and the suction platform through the suction platform to draw the The printing substrate is adsorbed and attached to the bearing surface of the suction platform, and the warped edge of...

AI Technical Summary

Problems solved by technology

However, since the printing substrate needs to be continuously transported along the bearing surface of the suction platform, the negative pressure formed by the suction platform should not be too large, otherwise the printing substrate cannot be transported smoothly. When pressing, the adsorption effect on some printing substrates with relatively high hardness or large warpage of warped edges is also poor.

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