JPH058565U - Image recorder - Google Patents

Abstract

(57) [Abstract] [Purpose] In the conventional image recording apparatus, the pressure applied to the pressure developing roller pair exceeds 1 ton, and it is difficult to make the apparatus large, heavy, high cost, small, lightweight and low cost. It was
An object of the present invention is to reduce the size, weight and cost of the pressure developing device without changing the developing capacity even if the pressure applied to the pressure developing device is lowered. [Structure] The capsule sheet 4 supplied from a cartridge 14 is wound around a direction-changing roller 5, passes between a pair of feed rollers 12, and further passes between a pair of concavo-convex roller for pressure development 13. The image receiving paper 8 passes between the feed roller pair 12 in a state of being superposed on the capsule sheet 4, and further passes between the pressure developing concave-convex roller pair 13 to be pressure-developed and then separated from the capsule sheet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an image recording device, and more particularly to an image recording device having a pressure developing device.

[0002]

[Prior Art]

 Conventionally, the structure of this type of image recording apparatus, for example, a color copying machine will be described with reference to FIG.

Below the document table 11 on which the document 1 is placed, a light source 2 that illuminates the document 1 and a lens 3 that condenses the reflected light are arranged. The photosensitive pressure-sensitive paper (referred to as a capsule sheet) 4 supplied from the cartridge 14 is wound around the direction changing roller 5 while passing between the pressure roller pair 9. The capsule sheet 4 is coated with a photocurable resin capsule containing a dye precursor and a photopolymerization initiator. The image receiving paper 8 is pressed between the pressure roller pair 9 while being superimposed on the capsule sheet 4, separated from the capsule sheet 4, and then passed through the heat fixing device 10.

Next, the operation of the above-mentioned conventional image recording apparatus will be described. The light from the light source 2 is applied to the original 1, and the reflected light is condensed by the lens 3 and applied to the capsule sheet 4. As a result, a chemical latent image is formed on the capsule sheet 4. Next, the exposed capsule sheet 4 is superposed on the image receiving paper 8 and developed by the pressure roller pair 9. At this time, the uncured capsules are crushed and the dye precursor therein undergoes a chemical reaction with the developer on the image receiving paper to form an image on the image receiving paper 8. After that, the image receiving paper 8 is further developed by the heat fixing device 10, the ink or the like is fixed and visualized, and the image receiving paper 8 is ejected.

[0005]

[Problems to be solved by the device]

 However, in the image recording apparatus as described above, the pressure applied to the pressure developing roller pair reaches 1 ton or more, and the apparatus becomes large, heavy and expensive, and it is difficult to reduce the size, weight and cost.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is that the developing ability does not change even if the pressure applied to the pressure developing roller pair is lowered. An object of the present invention is to provide a smaller, lighter, and cheaper image recording device than the conventional one by making the pressure developing device smaller, lighter and less expensive.

[0007]

[Means for Solving the Problems]

 The present invention, which has the above-mentioned object, provides a pressure image forming apparatus for transferring and developing the latent image of the exposed light and pressure sensitive paper on the image receiving paper when the light and pressure sensitive paper and the image receiving paper are superposed and transferred. If the pressure distribution of the contact surface between the pressure sensitive paper and the image receiving paper is not uniform, and the relative speed with the pressure sensitive paper becomes more than a certain value, the pressure distribution on the contact surface with the pressure developing device will be the development time. A pressure developing device that evenly distributes the pressure (the pressure applied to the entire image receiving paper is uniform while passing through the developing device), and a feeding device that supplies the photosensitive pressure-sensitive paper and the image receiving paper to the pressure developing device. Alternatively, it has either a drawing device for drawing from the pressure developing device.

[0008]

[Action]

 The image recording apparatus of the present invention having the above structure transfers and develops the latent image on the light and pressure sensitive paper which has been exposed by the pressure developing device to the image receiving paper. Further, the feeding device feeds the photosensitive paper and the image receiving paper to the pressure developing device.

Here, the inside of the contact surface of the pressure developing device is made of a relatively hard material. The pressure applied to the entire pressure developing device concentrates on this convex portion, and a high pressure is applied to the convex portion.

Further, the contact surface of the pressure developing device is made of a material softer than the inside of the contact surface to make the surface smooth. This is because if the contact surface is uneven, the pressure-sensitive paper or image-receiving paper will wrinkle.Therefore, the surface will be smooth, and the pressure concentrated on the convex portion inside the contact surface will be dispersed to some extent. This is because the pressure is not concentrated on the points but on the surface so that excessive pressure on the pressure-sensitive paper or the image receiving paper is not concentrated on one point.

If the friction coefficient of the material whose surface is smoothed is not less than a certain value, a material having a low friction coefficient is coated to reduce the friction coefficient as needed.

This is because if the pressure developing device is operated at the same speed as the speed at which the pressure-sensitive paper or the image-receiving paper is fed out, unevenness occurs in the way the pressure is applied. It is necessary to operate at a speed faster than the moving speed of the image receiving paper and slip on the photosensitive paper or the image receiving paper.For that purpose, it is better to have a smaller friction coefficient on the surface of the concavo-convex roller pair for the pressure device to slip. Is.

Further, instead of the method of feeding the photosensitive pressure-sensitive paper and the image receiving paper to the pressure developing device by the feeding device, it is also possible to use a drawing device that pulls out from the pressure developing device.

In this case, the pressure developing device rotates in the opposite direction to the drawing device, that is, operates in the direction opposite to the traveling direction of the light and pressure sensitive paper and the image receiving paper. For this reason, in front of the pressure developing device, there is a positive operation sensor that detects that the image receiving paper has overlapped with the light and pressure sensitive paper, and when this detects the image receiving paper, the pressure developing device causes the light and pressure sensitive paper and the direction of the image receiving paper to advance. That is, it operates at the same speed in the forward direction.

Next, the photosensitive pressure-sensitive paper and the image receiving paper sent to the pressure developing device pass through the drawing device, and when the reverse operation sensor immediately after that detects the image receiving paper, the pressure developing device operates in the opposite direction. It has become.

[0016]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIG. In the description, the same components as those of the conventional technique will be designated by the same reference numerals.

Below the document table 11 on which the document 1 is placed, a light source 2 that illuminates the document 1 and a lens 3 that condenses the reflected light are arranged. The capsule sheet 4 supplied from the cartridge 14 revolves around the direction changing roller 5, passes between the feed roller pair 12, and further passes between the pressure developing concave-convex roller pair 13.

The rollers of the pressure developing concavo-convex roller pair 13 are made of a relatively hard material such as metal, and are made concavo-convex as shown in FIG. The unevenness is such that when the roller rotates, the pressure is applied substantially uniformly in the lateral direction (pressurized portion) of the roller. Further, as shown in FIG. 3 (a), the surface of the roller is made smooth and coated with a relatively soft material 15 such as resin or rubber so that the pressure of the convex portion 6 in FIG. 2 diffuses to some extent. It is coated with a low friction material 16 so as to slip on the capsule sheet 4 and the image receiving paper 8.

The pressure developing concavo-convex roller pair 13 rotates faster than the traveling speed of the capsule sheet 4 and the image receiving paper 8. For this reason, the feed roller pair 12 presses the capsule sheet 4 and the image receiving paper 5 so that the pressure developing concave-convex roller pair 13 does not feed the capsule sheet 4 and the image receiving paper 8 faster than the delivery speed of the feed roller pair 12. There must be. Therefore, the pressing force and the friction coefficient of the surface are taken into consideration so that the feed roller pair 12 holds the capsule sheet 4 and the image receiving paper 8 with a force larger than the feed force of the pressure developing roller pair 13. . That is, the feed speed of the feed roller pair 12 becomes the feed speed of the capsule sheet 4 and the image receiving paper 8.

The capsule sheet 4 is coated with a photocurable resin capsule containing a dye precursor and a photopolymerization initiator. The image-receiving paper 8 passes between the feed roller pair 12 in a state of being overlapped with the capsule sheet 4, and further passes through between the pressure developing concave-convex roller pair 13 to be pressed, and then separated from the capsule sheet 4, and thereafter. It passes through the inside of the heat fixing device 10.

Next, the operation of the image recording apparatus of the present invention having the above configuration will be described in more detail. The light from the light source 2 is applied to the original 1, and the reflected light is condensed by the lens 3 and applied to the capsule sheet 4. As a result, a chemical latent image is formed on the capsule sheet 4. Next, the exposed capsule sheet 4 is superposed on the image receiving paper 8, passes between the feed roller pair 12, and is developed by the pressure developing roller pair 13. At this time, since the pressure developing concavo-convex roller 13 rotates at a speed faster than the feeding speed of the feed roller pair 12 and slips on the capsule sheet 4 and the image receiving paper 8, the entire capsule sheet 4 and the image receiving paper 8 are covered. It is developed by applying uniform pressure.

At that time, the uncured capsule is crushed and the dye precursor therein causes a chemical reaction with the developer on the image receiving paper 8 to form an image on the image receiving paper 8. After that, the image receiving paper 8 is colored by the heat fixing device 10 to be fixed and visualized.

As shown in FIG. 3B, there is also a method of rotating the pressure developing concavo-convex roller pair 13 in the direction opposite to the direction of movement of the image receiving paper 8 and the capsule sheet 4. At this time, when the forward rotation sensor 17 detects the image receiving paper 8, the pressure developing concavo-convex roller pair 13 rotates forward at the same speed as the moving speed of the image receiving paper 8, the image receiving paper 8 advances, and the reverse rotation sensor 18 causes the image receiving paper 8 to move. Is detected, the pressure developing concavo-convex roller pair 13 rotates in the opposite direction. The reverse rotation speed is the same as that of the pressure developing concavo-convex roller pair 13, and the reverse rotation is performed at a high speed so that pressure is evenly applied, and the capsule sheet 4 and the image receiving paper 8 are slipped.

Here, the pull-out roller pair 19 is larger than the pulling force of the pressure developing concavo-convex roller pair 13 so as to control the traveling speed of the image receiving paper 8 and the capsule sheet 4 like the feed roller pair 12. It is designed to be pulled out by force.

Further, when the image receiving paper 8 advances and the forward rotation sensor 17 detects the end of the image receiving paper 8, the pressure developing concave-convex roller pair 13 again rotates forward. When the pressure developing concavo-convex roller pair 13 is rotated in the opposite direction to the image receiving paper 8 or the capsule sheet 4, the relative speed becomes large. Therefore, when the pressure developing concavo-convex roller pair 13 is normally rotated. Therefore, the rotation speed of the pressure developing concavo-convex roller pair 13 may be slow.

As for the pressure developing concavo-convex roller pair 13, both may be concavo-convex rollers, only the capsule sheet side may be concavo-convex roller, and the image receiving paper side may be concavo-convex roller only. The capsule sheet 4 and the image-receiving paper 8 may be passed twice to connect them.

Next, referring to FIG. 4, in place of the pressure developing concave-convex roller pair 13, it is possible to use the following pressure fixing concave-convex belt 20. The pressure fixing concave-convex belt 20 has the following configuration.

First, as shown in FIG. 5A, a hard material 21 (bead-shaped) such as a relatively hard resin, ceramic, or metal is dispersed in a soft material 22a such as a relatively soft resin or rubber, which is required. According to (when the friction coefficient of the soft material 22a is large), the surface contacting the capsule sheet 4 is coated with a low friction material 16a having a low friction coefficient.

Further, as shown in FIG. 5B, a hard belt 24 embossed with a resin or the like, and a surface contacting the capsule sheet 4 is covered with a low friction material 16b having a low coefficient of friction as needed. This means that the low-friction material 16b is not required if wrinkles do not occur on the capsule sheet or the image-receiving paper when the unevenness is small to some extent, and the surface friction coefficient is below a certain level.

Further, as shown in FIG. 5C, a hard belt 24 in which a hard material such as metal or resin is provided with irregularities is covered with a soft material 22b such as resin or rubber. The surface contacting the contact 4 is coated with a low friction material 16 having a low friction coefficient.

By using each of the above belts as the pressure fixing concave-convex belt 20 of FIG. 5, the same effect as that of the pressure developing concave-convex roller pair can be obtained. The arrangement of the pressure fixing concave-convex belt 20 conforms to the pressure developing concave-convex roller pair 13.

As for the pulling-out device, instead of the pulling-out roller pair 19, a roller other than the pulling-out device 23 shown in FIG. 6 may be used.

[0033]

[Effect of the device]

 As is clear from the above description, according to the image recording apparatus of the present invention, the pressure applied to the entire device is concentrated on the convex portion inside the contact surface of the pressure image device, and the high pressure is applied to the convex portion. Because of this, even if the pressure applied to the entire pressure developing device is lowered, the same developing ability as before can be obtained. As a result, the pressure applied to the pressure developing device can be reduced, and the pressure developing device can be reduced in size, weight, and cost.

[Brief description of drawings]

FIG. 1 is a schematic view showing an image recording apparatus embodying the present invention.

FIG. 2 is a concavo-convex roller for pressure development embodying the present invention,
It is a figure of the lowest layer part with unevenness inside a contact surface.

FIG. 3 is a cross-sectional view of a pressure developing concave-convex roller embodying the present invention and an operation explanatory view of the pressure developing roller.

FIG. 4 is a configuration diagram of a second embodiment of a pressure developing concavo-convex roller embodying the present invention.

FIG. 5 is a cross-sectional view of a pressure fixing concave-convex belt of the present invention.

FIG. 6 is a cross-sectional view of another modified example of the pressure fixing concave-convex roller of the present invention.

FIG. 7 is a schematic configuration diagram of a conventional image recording apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Object (original) 2 ... Main exposure source 3 ... Condensing lens 4 ... Capsule sheet 5 ... Direction changing roller 6 ... Convex part 7 ... Hard uneven roller layer 8 ... Image receiving paper 9 ... Pressure roller pair 10 ... Heat fixing Device 11 ... Original platen 12 ... Feed roller pair 13 ... Pressure developing concave-convex roller pair 14 ... Cartridge 15 ... Soft material 16 ... Low friction material 17 ... Forward rotation sensor 18 ... Reverse rotation sensor 19 ... Withdrawal roller pair

Claims (1)

[Claims for utility model registration] 1. When the photosensitive pressure-sensitive paper and the image-receiving paper are transferred and developed in order to transfer and develop the latent image of the exposed photosensitive paper on the image-receiving paper, When the pressure distribution of the contact surface between the pressure developing device and the photosensitive pressure-sensitive paper / image receiving paper is non-uniform, and the relative speed with the photosensitive pressure-sensitive paper becomes a certain value or more, the pressure distribution of the contact surface with the pressure developing device And a pressure developing device that uniformly distributes the pressure-sensitive paper and the image receiving paper to the pressure developing device during the developing time (the pressure applied to the entire image receiving paper is uniform while passing through the developing device). Alternatively, the image recording apparatus is provided with any one of a withdrawing device for withdrawing from the pressure developing device.