JPS6351263A - Pressure roller mechanism - Google Patents

Abstract

PURPOSE:To prevent the meandering of paper sheet by using a parallel pressure roller for strongly pressing the center part of the paper sheet and a pressure taper roller for pressing the both outside parts relatively weakly. CONSTITUTION:A parallel pressure roller 3 for strongly pressing a postcard 5 is installed at the center part of a roller shaft 2. A pressure taper roller 4 for pressing the outside part on the both sldes relatively weakly is installed, and squeezes the postcard 5 together with a platen 1 and transports the postcard in the direction of arrow A. The pressure roller 3 and the pressure taper roller 4 which are installed onto a roller shaft 2 can be moved freely also in the transverse direction and in the revolution direction. Therefore, a nonuniform pressing force is generated to prevent the printing pitch discrepancy in the printing onto the postcard 5 and meandering of paper sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure roller mechanism used to hold down paper during paper feeding.

[Conventional technology]

Conventional paper press rollers were constructed with only a parallel pleasure roller, and only a uniform pressing force was applied when holding the paper.

[Problem that the invention seeks to solve]

For the above-mentioned pattern, conventional pressure rollers have the disadvantage that only force works to apply uniform pressure when pressing M, and when printing all of the ``postcard paper'', the printing pitch will be uneven, fcb, paper strips, etc. will occur. there were.

[Ninth method to solve the problem]

The pressure roller mechanism according to the present invention includes a parallel pressure roller that strongly presses the central portion of the sheet, and a pressure roller that presses both outer portions relatively weakly.

〔Example〕

FIG. 1 shows a pressure roller mechanism diagram of the present invention. FIG. 2 shows a detailed view of the tapered roller.

7"L/pressure roller 3 The pressure taper roller 4 is attached to the roller shaft 2 and is in contact with the n1 platen/1. When the platen 1 rotates in the direction of arrow 6,
The postcard paper 5 is pressed by the pressure roller 3 and the pressure taper roller 4 before being sent out. The pressure roller 3 and pressure tapered roller 4 attached to the roller shaft 2 have a structure that allows them to move freely in the left-right direction and rotational direction. Therefore, a strong pressing force is applied to the middle of the postcard paper 5, and a weak pressing force is applied to both ends by the pressure taper roller 4, so that uneven pressing force is obtained.

〔Effect of the invention〕

As explained above, in the present invention, by obtaining non-uniform pressing force, the disadvantages of printing pitch and paper line when printing on postcard paper are solved.

[Brief explanation of drawings]

FIG. 1 is a mechanical diagram of a brake roller according to an embodiment of the present invention, and FIG. 2 is a detailed diagram of a tapered roller. 1...Platen, 2...Roller shaft, 3...Brellasha roller, 4...
Glascia Taper Lower Array Soshinrowo 3 and l Diagram 2■

Claims (1)

[Claims] A parallel pressure roller that strongly presses the center of the paper,
A pressure roller mechanism characterized by comprising a pressure roller that presses both outer portions relatively weakly.