Recording apparatus

Abstract

The present invention relates to a recording apparatus which stabilizes the locations of a transfer roller and a bearing and prevents the movement of a recording medium caused by the movement of the transfer roller, to thereby improve the sticking accuracy of the recording device without an increase in cost, comprising a conveyance roller; a driven roller rotating as driven from the conveyance roller; pushing means for pushing the driven roller to the conveyance roller; a bearing for supporting the conveyance roller; driving means for rotating the conveyance roller; and drive transmitting means. The bearing includes two contact portions with the circumference of a spindle for supporting the conveyance roller and the bearing supports the conveyance roller as to locate a perpendicular direction of a line coupling the two contact portions within a varying range of a vector direction of exertion force exerted to the bearing at a time of stop and operation of the conveyance roller.

Description

technical field [0001] The present invention relates to a recording device for forming an image on a recording medium. Background technique [0002] In recent years, the image quality of an output image of a recording device, especially an inkjet recording device, has been greatly improved, and the precision required to realize the image quality has become higher. As a means of improving the image quality of this recording device, there is a proposal to reduce the ink ejection amount to reduce the dot size on the recording medium in order to reduce the graininess of the ink dots ejected on the image. When the dots become smaller, the areas where the dots should overlap are slightly changed when the landing positions of the dots are slightly changed (conversely, the areas that cannot be overlapped overlap), and the density and color tone of the area are deviated. This variation in density or color tone becomes white streaks, black streaks, or color unevenness of the image, d...

AI Technical Summary

Problems solved by technology

[0005] Here, even if the pressing force Fp generated by the pinch roller 1004 makes the gap between the conveying roller 1001 and the bearing 1002 and the gap between the bearing 1002 and the support 1003 move downward in the figure, since the cross-sectional shape of the conveying roller 1001 is circular 1. The bearing 1002 is also in a circular shape, and the support 1003 is also in a circular shape. On the inner circumference of the bearing 1002, the conveying roller 1001 is easy to move in the Y, Y' directions. Moving in the direction of Y, Y', when the external force generated by external disturbance is applied, the conveying roller 1001 is easy to move, and the static position of the conveying roller 1001 relative to the support 1003 cannot be determined

[0006] In addition, in the conventional method of providing minute protrusions on the outer peripheral surface of the above-mentioned bearing and inserting the protrusions while cutting the bearing 1002 when mounting the bearing 1002 on the support, although the protrusions are eliminated when the bearing 1002 is inserted, However, when inserting the bearing, it is necessary to have a protrusion that does not deform the inner diameter of the bearing. Therefore, it is necessary to make a protrusion that is easy to cut, that is, weak, and deformed by dropping or vibration during transportation, resulting in a gap.

In addition, resin bearings such as POM generally have different thermal expansions from metal bearings and conveying rollers, so there is a problem that the size changes due to temperature changes, resulting in gaps.

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