JPH01267656A - Photoreceptive sheet conveying device - Google Patents

Abstract

PURPOSE:To prevent a photoreceptive sheet from being wrinkled by providing a wrinkle preventive rollers which supports both side parts of the photoreceptive sheet right before its pressure application process slantingly to the conveying direction of the photoreceptive sheet. CONSTITUTION:The wrinkle preventive roller 13 which supports the noncoat parts 21a of the photoreceptive sheet 21 is provided right before a point of pressure application by upper and lower pressure rollers 11 and 12. The wrinkle preventive roller 13 has an upper roller 13 and a lower roller 13b, and the lower roller 13b is provided at right angles to the conveying direction of the photoreceptive sheet 21, but the upper roller 13a is provided slantingly to the conveying direction of the photoreceptive sheet 21. The upper roller 13a, therefore, rotates to draw the photoreceptive sheet 21 to both side end parts in the rotating direction of the upper roller 13a and to remove its loosening and straining. Consequently, the photoreceptive sheet is not wrinkled and a formed image is excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION (AL Industrial Field of Application) This invention relates to a photoreceptive sheet that conveys the above-mentioned photoreceptive sheet without wrinkling in an image forming apparatus using a photoreceptive sheet coated with photosensitive microcapsules. Regarding a conveyance device.

(bl) Conventional technology Image formation using a photocurable material, a light-receiving sheet coated with photosensitive microcapsules (particle size approximately 5 μm) containing a colorless dye in a resin shell, and an image-receiving sheet coated with the colorless dye. The method for doing this is disclosed in Japanese Patent Application Laid-Open No. 58-887.
This is shown in Publication No. 39. When the light-receiving sheet is exposed to light reflected from an original or the like, the photosensitive microcapsules that are exposed to the light are cured, and a selectively cured image is formed on the entire light-receiving sheet. When the image-receiving sheet is superimposed on the light-receiving sheet and pressurized, the uncured photosensitive microcapsules are destroyed, the encapsulated colorless dye flows out and is colored by the developing material of the image-receiving sheet, and the image-receiving sheet is A colored image is formed.

When forming a colored image as described above, in order to destroy the uncured photosensitive microcapsules, approximately 90 kg of
Requires high pressure on the order of /cm. In order to uniformly apply such high pressure to the light-receiving sheet, a pair of pressure rollers has conventionally been used.

(C1 Problem to be solved by the invention) However, as mentioned above, when applying a high pressure of about 90 kg/G to the light-receiving sheet using a pressure roller, wrinkles occur in the light-receiving sheet, which adversely affects the formed image. Conventionally, the light-receiving sheet is made into a roll and is often wound up from a storage roller to a take-up roller via a pressure roller (pressure section), and if wrinkles occur at the pressure section, the pressure of the pressure roller However, as mentioned above, high pressure is applied to the pressure roller, so it is actually impossible to release the pressure and remove the wrinkles. As a result, it became difficult to operate the wrinkle removal chamber, resulting in a lack of serviceability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light-receiving sheet bt feeding device that can prevent wrinkles in the light-receiving sheet as much as possible, thereby preventing problems such as deterioration of serviceability.

((1) Means for Solving the Problems This invention provides a light-receiving sheet for transporting a roll sheet-like light-receiving sheet from a storage roller to a take-up roller via a pressure section constituted by upper and lower pressure rollers. The conveying device is characterized in that anti-wrinkle rollers that support both sides of the light-receiving sheet are provided immediately before the pressure unit, obliquely with respect to the conveyance direction of the light-receiving sheet.

Another device is a light-receiving sheet conveying device that conveys a roll sheet-shaped light-receiving sheet from a storage roller to a take-up roller via a pressure unit constituted by upper and lower pressure rollers, wherein the pressure-receiving sheet is The device is characterized in that an elastic roller is provided immediately before the photoreceptor sheet to bring the light-receiving sheet into contact with the upper pressure roller.

(90 kg of the light-receiving sheet in the form of a work roll is loaded with a pressure roller.
When a pressure as high as /as is applied, wrinkles occur in the light-receiving sheet. The inventors of the present invention have made extensive studies regarding this wrinkle formation, and have found that this wrinkle formation is caused by loosening of the light-receiving sheet in front of the pressure point. Therefore, by providing a member for removing slack in the light-receiving sheet in front of the pressure point, it is possible to prevent the light-receiving sheet from wrinkling.

In the light-receiving sheet conveying device according to the present invention, when the anti-wrinkle roller provided diagonally with respect to the conveyance direction of the light-receiving sheet rotates, the light-receiving sheet is pulled in the direction of rotation, so that the light-receiving sheet becomes loose. never occurs.

Further, in other devices, since the light-receiving sheet is brought into contact with the upper roller by the elastic roller, the light-receiving sheet does not become slack.

(f) Embodiment FIG. 3 is a front configuration diagram of a copying machine to which a light-receiving sheet feeding device according to an embodiment of the invention as set forth in claim (1) is applied.

A pressure roller 1 is disposed approximately in the center of the main body of the copying machine. The pressure roller 1 has an upper pressure roller 1) and a lower pressure roller 12, and the lower pressure roller 12 is pressed against the upper pressure roller 1) by a pressure contact mechanism including a spring, etc., and the pressure roller 12 is pressed against the upper pressure roller 1), and the pressure roller 12 is pressed against the upper pressure roller 1).
A high pressure of about kg/ca+ is applied. The contact point of the upper and lower pressure rollers 1) and 12 is a pressure point P2, and the light-receiving sheet and the image-receiving sheet are overlapped and pressed. A media cartridge 2 for storing an unused light-receiving sheet is provided on the left side of the upper roller 1). Photoreceptive sheet 2 coated with photosensitive microcapsules
1 is made into a roll, one end of which is connected to conveyor rollers 22a to 2.
The film is wound onto a winding roller 23 via a winding roller 2e. During its conveyance, the light-receiving sheet 21 is exposed to light reflected from the original at an exposure point P1 to form a selectively cured image.

A document table 4I is provided on the top surface of the copying machine main body, and a document to be copied is placed thereon. An optical system including a light source lamp 42, mirrors 43 to 46, and a lens 47 is provided below the document table 41. Light source lamp 42. Mirror 43-4
5 moves along the document table 41 in the direction of the arrow in the figure to scan the document on the document table 41, and sends the reflected light to mirrors 43 to 4G.
The light is guided to the exposure point P1 through the lens 47, and the light-receiving sheet 21 is exposed to light.

On the right side of the main body of the copying machine, paper storage units 31 and 32 are provided for storing developing material and an image receiving sheet coated with a thermoplastic resin.

Paper sumo wrestlers 1-31 and 32 each have an image receiving sheet 31
a, 32a are housed, and a paper feed roller 31b.

32b rotates, the paper cassette 3
One or thirty-two image receiving sheets 31a or 32a are fed.

The image-receiving sheet 31a or 32a fed from either of the paper cassettes 7) and 31 and 32 is superimposed on the light-receiving sheet 21 on which the selectively cured image has been formed, and then the upper and lower pressure rollers 1
), 12 at a pressurizing point P2.

FIG. 1 is a perspective view of the vicinity of the pressure roller l, and FIG. 2 is a side and front view thereof.

Vertical pressure roller 1). A light receiving sheet 21 pulled out from a media cartridge (not shown) is sandwiched between the sheets 12 . Non-coated portions 21a, which are not coated with photosensitive microcapsules, are formed at both end portions of the light-receiving sheet. The light-receiving sheet 21 has a non-coated portion 21a.
It is wider than the width of the pressure roller l by an amount corresponding to the width of the pressure roller l. Immediately before the pressure point P2, the non-coated portion 21a of the light-receiving sheet
An anti-wrinkle roller 13 is provided to support the anti-wrinkle roller 13. The anti-wrinkle roller 13 has an upper roller 13a and a lower roller 13b.
-21 is provided diagonally with respect to the conveyance direction. Therefore, as the upper roller 13a rotates, the light-receiving sheet 21 is pulled toward both ends, which is the rotational direction of the upper roller 13a, and the slack and distortion are removed. In this state, the light-receiving sheet is placed on the upper and lower pressure rollers 1). 12. Therefore, wrinkles do not occur in the light-receiving sheet, and the formed image becomes good.

At this pressurizing point P2, as described above, the image receiving sheet 31a (32a) is superimposed on the light receiving sheet 21 and pressurized, whereby the image receiving sheet 31a (32a)
A colored image is formed. The image-receiving sheet 31a (32a) on which the colored image has been formed is separated from the light-receiving sheet 21, and is conveyed to a heat roller 52 by a conveyor belt 51 and heated. This heating causes the image receiving sheet 31a to
(32a) The coloring reaction of the colored image on the image receiving sheet 31a is promoted (Japanese Unexamined Patent Publication No. 61-24495).
(32a) The thermoplastic resin coated on the top softens or melts to cover the surface of the colored image and gives gloss to the colored image (Japanese Unexamined Patent Publication No. 60-259490)
. This image receiving sheet 31a (32a) is
The paper is ejected to the paper ejection tray 54.

In this embodiment, like the anti-wrinkle roller 13, the upper roller of the conveyance roller 22C is provided diagonally with respect to the conveyance direction of the light-receiving sheet 21, and pulls the light-receiving sheet 21 toward both ends. The light-receiving sheet does not slacken at the exposure point PL, and image distortion during exposure can be prevented.

Immediately before the pressure point P2' where the upper pressure roller 1)' and the lower pressure roller 12' come into pressure contact, an elastic roller 14 that comes into contact with the upper pressure roller 11' is provided. The elastic roller 14 is made of urethane rubber, for example, and the elastic roller 14 is in pressure contact with the Merula 1)' and is pressed against the roller 1)', thereby removing wrinkles, waving, etc. from the light receiving sheet 21'. And the light receiving sheet 21' is the upper and lower pressure roller 1)'
, 12' overlap and pressurize the image-receiving sheet at the pressure unit P2', and a colored image is formed on the image-receiving sheet. At this time, since the wrinkles, corrugations, etc. of the light-receiving sheet are removed by the elastic roller 4 as described above, the formed image is not adversely affected by the wrinkles, etc.

(g1 Effect of the Invention) According to the light-receiving sheet conveying device of the present invention, the anti-wrinkle roller provided diagonally with respect to the conveyance direction of the light-receiving sheet or the elastic roller in contact with the upper pressure roller allows Since wrinkles, etc. on the light-receiving sheet are removed, wrinkles, etc. do not occur in the light-receiving sheet at the pressurizing section, and therefore, the adverse effect of wrinkles on the quality of formed images is prevented.

can do. By preventing the light-receiving sheet from wrinkling, the number of troublesome operations required to remove wrinkles from the light-receiving sheet can be minimized, and service performance can be prevented from being degraded by forcing users to perform difficult tasks. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the vicinity of the pressure roller of an embodiment of the light-receiving sheet conveying device shown in claim (1), and FIG. 2 is a side view, front view, and FIG. 3 of the same light-receiving sheet conveying device. 1 is a front configuration diagram of a copying machine to which the same light-receiving sheet conveying device is applied. Further, FIG. 4 is a perspective view of the vicinity of the pressure roller of the embodiment of the light-receiving sheet conveying device shown in claim (2), and FIG. 5 is a side view and a front view of the same light-receiving sheet conveying device. II, 1)'-Upper pressure roller, 12.12'-Lower pressure roller, 13-Anti-wrinkle roller, 13a-Upper roller, 13b-Lower roller, 14-Elastic roller, 21.21'-Light receiving sheet, P2 ．． P2'-pressure point.

Claims (2)

[Claims] (1) In a light-receiving sheet conveying device that transports a roll sheet-shaped light-receiving sheet from a storage roller to a take-up roller via a pressure section constituted by upper and lower pressure rollers, a light-receiving sheet is provided immediately before the pressure section. A light-receiving sheet conveying device characterized in that anti-wrinkle rollers supporting both sides of the light-receiving sheet are provided obliquely to the conveyance direction of the light-receiving sheet. (2) In a light-receiving sheet conveying device that transports a roll-shaped light-receiving sheet from a storage roller to a take-up roller via a pressure section constituted by upper and lower pressure rollers, a light-receiving sheet is provided immediately before the pressure section. A light-receiving sheet conveying device comprising an elastic roller that presses the receiving sheet against an upper pressure roller.