JP2890544B2 - Image forming device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly, to a photosensitive pressure-sensitive paper which is transported along a transport path having an exposure position, and wherein the photosensitive pressure-sensitive paper is exposed at the exposure position. The present invention relates to an image forming apparatus that exposes pressure-sensitive paper to form a latent image.

2. Description of the Related Art Conventionally, in this type of image forming apparatus, a photosensitive pressure-sensitive paper such as a microcapsule paper is transported along a transport path having an exposure position by a plurality of transport means, and the photosensitive pressure sensitive paper is exposed at the exposure position. The pressure paper was exposed to form a latent image.

[Problem to be Solved by the Invention] However, in the above-described image forming apparatus,
In some cases, the unexposed photosensitive medium on the exposed surface adheres to the transport unit on the exposed surface side of the photosensitive pressure-sensitive paper among the plurality of transport units. When the photosensitive medium adheres to the conveying means in this way, the photosensitive medium adheres again to the photosensitive pressure-sensitive paper in the course of the conveyance, causing image contamination. In this type of photosensitive pressure-sensitive paper, after a latent image is formed by exposure, the microcapsules are decompressed by pressure development to develop a latent image (visualization) from the inclusions (photosensitive medium). is there. here,
When the photosensitive pressure-sensitive paper comes into contact with a member in the apparatus before the pressure development, the capsule at the contact portion is broken, and the inclusions are attached to the surface of the photosensitive pressure-sensitive paper. When the photosensitive pressure-sensitive paper is transported to the pressure developing device by a pair of transport rollers in this state, the inclusions (photosensitive medium) adhered to the surface of the photosensitive pressure-sensitive paper adhere to the surface of the transport roller, and are again transferred to the photosensitive pressure-sensitive paper. Reattach (transfer). The photosensitive medium also adheres to a portion that has not been destroyed by the contact. When the photosensitive pressure-sensitive paper is conveyed to the pressure developing device in this state, the portion to which the photosensitive medium has adhered appears as a scratch on the image. For example, by adhering to the untouched part, instead of the original color of that part,
It has a different color, such as black.

Further, in an image forming apparatus that exposes the photosensitive pressure-sensitive paper while transporting the photosensitive pressure-sensitive paper, slippage of the photosensitive pressure-sensitive paper occurs, which may cause an image to be displaced from the original to be formed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and even if the photosensitive medium on the exposed surface of the photosensitive pressure-sensitive paper adheres to the conveyance roller, image shift due to image contamination or slippage of the photosensitive pressure-sensitive paper may occur. It is intended to provide an image forming apparatus without any.

Means for Solving the Problems In order to achieve this object, the present invention provides a method for exposing a photosensitive pressure-sensitive paper carrying microcapsules to an exposure position, and pressing the photosensitive pressure-sensitive paper on which the latent image is formed by the exposure. In an image forming apparatus which conveys to a developing device and develops a latent image by pressure development, the image forming apparatus is disposed on a conveying path of the photosensitive pressure sensitive paper between the exposure position and the pressure developing device, and holds the photosensitive pressure sensitive paper. A pair of conveying rollers for conveying to the pressure developing device,
And a cleaning means for cleaning a contact surface of the transport roller that contacts the surface of the pair of transport rollers that carries the microcapsules of the photosensitive pressure-sensitive paper.

[Operation] In the present invention having the above-described configuration, the cleaning unit may be configured such that the cleaning unit contacts the surface of the pair of transport rollers that contacts the surface carrying the microcapsules of the photosensitive pressure-sensitive paper upstream of the pressure developing device in the transport direction. to clean. For this reason, when the microcapsules are destroyed by the photosensitive pressure-sensitive paper coming into contact with the inside of the image forming apparatus, and if the inclusions are transported with the inclusions attached, the inclusions of the capsules are brought into contact with the transport roller. Although it adheres, it is cleaned so that it does not adhere again to the photosensitive pressure-sensitive paper.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Here, a case where the present invention is applied to a full-color copying machine will be described as an embodiment.

First, FIG. 2 is a view showing the entire configuration of the full-color copying machine.

In the full-color copying machine 1 of the present embodiment, photosensitive paper composed of microcapsule paper 11 and photosensitive paper 16 which are photosensitive pressure-sensitive paper is used. A movable platen glass 2 and a platen cover 3 are provided on a top plate portion of the copier 1, and a desired document 4 is set on the platen glass 2 in a state where the document 4 is prone.

A light source using a halogen lamp 5 is disposed above the copying machine 1. The light source irradiates the original platen glass 2 linearly through a slit through hole provided on the upper surface of the body, and is emitted from the halogen lamp 5. The transmitted light passes through the transparent platen glass 2 and is reflected by the document 4 placed thereon. Therefore, the exposure scan of the original 4 is performed by moving the original platen glass 2. The light reflected from the original 4 passes through a filter 6 for adjusting the color tone of the copied image and enters a lens 7, and the light projected by the lens 7 is turned by a pair of reflecting mirrors 8 and 9, An image is formed on the microcapsule paper 11 located along the exposure table 10.

The reflection mirrors 8 and 9 are mounted on a mirror mounting plate,
The fine adjustment of the mounting position of the mirror mounting plate adjusts the optical path length and the focus.

On the other hand, the elongate microcapsule paper 11 is housed in a cartridge which is wound around a cartridge shaft 12 and can be removed from the machine body.

The microcapsule paper 11 coming out from the lower part of the cartridge is guided by the feed roller 22 and the guide roller 23, passes under the exposure table 10, and then passes through the drive roller 24, the nip roller 25, and the tension absorption roller 26 to the pressure developing device 13. Supplied. Here, a cleaning device 30 described later is attached to the nip roller.

Further, the microcapsule paper 11 passed through the pressure developing device 13
Is guided by the feed roller 27, the separation mechanism 28, and the meandering adjustment roller 29, and then wound on the winding shaft 15.

The unexposed microcapsule paper 11 after leaving the cartridge is kept unexposed by the light-shielding cover. or,
The conveying speed of the microcapsule paper 11 is controlled to be constant, and is matched with the moving speed of the platen glass 2. The latent images of the lines are sequentially formed.

Below the pressure developing device 13, a paper feed cassette 17 accommodating developer paper (recording paper) 16 constituting a paper feed device is mounted, and a sucker-type paper feed mechanism that sucks paper using negative pressure suction is provided.
The developing paper 16 is taken out one by one by a paper feeding mechanism 18 and conveyed by a feed roller 19a and a pinch roller 19b, and the developing paper rollers 19c and 19d and the resist gate 1 are provided.
After the tip is aligned by 9e, the pressure developing device 13
Transported to

Thus, the microcapsule paper 11 is
Is supplied in a state where the developing paper 16 and
The surface of the microcapsule on which the latent image of the microcapsule paper 11 is formed and the surface of the developer coated with the developer of the developer 16 are united in a state where they are in contact with each other and are sandwiched between the small-diameter roller 13a and the backup roller 13b to apply pressure. Can be This pressure destroys the unexposed microcapsules and forms an image on the color developing paper 16.

After the microcapsule paper 11 and the color developing paper 16 coming out of the pressure developing device 13 are separated by the separating mechanism 28, the color developing paper 16 is formed by the heat roller 20a of the heat fixing device 20 to promote color development to form an image. Then, the sheet is discharged to the sheet discharge tray 21 by the sheet discharge rollers. The separated microcapsule paper 11 is wound around the winding shaft 15 via the meandering adjustment roller 29.

Next, the configuration of the cleaning device 30 and its surroundings will be described with reference to FIG.

A drive roller 24 and a nip roller 25 as a pair are provided behind the exposure table 10 for exposing the microcapsule paper 11, and each of them rotates in the direction of an arrow to convey the microcapsule paper 11.

A cleaning device 30 including a felt 31, a spring 32, and a case 33 is provided near the nip roller 25.
Pressing on 25.

In the process of forming a latent image as described above, the unexposed microcapsules 11a on the microcapsule surface of the microcapsule paper 11 may adhere to the nip roller 25. In this case, the felt 31 wipes the microcapsules 11a of the nip roller 25 while the nip roller 25 rotates.

As is apparent from the above description, the full-color copying machine 1 of the present embodiment includes the cleaning device 30 for cleaning the nip roller 25 that conveys the microcapsule paper 11, and the unexposed micro-particles adhered to the nip roller 25. Since the cleaning device 30 cleans the capsule 11a, there is no risk of image contamination or image displacement due to slippage of the microcapsule paper 11.

In the cleaning device 30 of the present embodiment, the microcapsules 11a attached to the nip roller 25 are wiped off by the felt 31, but may be configured to be scraped off by a spatula.

In addition, changes can be made without departing from the spirit of the present invention.

[Effects of the Invention] As described above in detail, in the present invention, the cleaning unit is disposed upstream of the pressure developing device in the transport direction so that the cleaning unit contacts the surface of the pair of transport rollers that bears the microcapsules of the photosensitive pressure-sensitive paper. Clean the roller contact surface. For this reason, when the microcapsules are destroyed by the photosensitive pressure-sensitive paper coming into contact with the inside of the image forming apparatus, and if the inclusions are transported with the inclusions attached, the inclusions of the capsules are brought into contact with the transport roller. Although it adheres, it is cleaned so that it does not adhere again to the photosensitive pressure-sensitive paper. That is, it is possible to prevent the image developed by the pressure development from being repeatedly stained. In addition, image displacement due to slippage of the photosensitive pressure-sensitive paper can be prevented, and the effect that it is very practical can be obtained.

[Brief description of the drawings]

1 and 2 show an embodiment embodying the present invention. FIG. 1 is an enlarged front view around a cleaning device, and FIG. 2 is a sectional view of a full-color copying machine according to the present embodiment. In the figure, 1 is a full-color copying machine, 10 is an exposure table, 11 is a microcapsule paper, 22 and 27 are feed rollers, 23 is a guide roller, 24 is a drive roller, 25 is a nip roller, 26 is a tension absorption roller, and 28 is a separation roller. Mechanism, 29 is a meandering adjustment roller, 30
Is a cleaning device.

Claims (1)

(57) [Claims] 1. A photosensitive pressure-sensitive paper carrying microcapsules is exposed at an exposure position, and the photosensitive pressure-sensitive paper on which a latent image has been formed by the exposure is conveyed to a pressure developing device and pressure-developed to develop a latent image. A pair of conveying rollers disposed on a conveying path of the photosensitive pressure-sensitive paper between the exposure position and the pressure developing device, and holding the photosensitive pressure-sensitive paper to convey the pressure-sensitive paper to the pressure developing device. An image forming apparatus, comprising: a cleaning unit that cleans a contact surface of the transport roller that contacts a surface of the pair of transport rollers that carries the microcapsules of the photosensitive pressure-sensitive paper.