JPH0243549A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain an excellent image and an image forming device with high safety by heating contactlessly a developing sheet, stopping energizing a heater, and driving a fan when abnormality occurs. CONSTITUTION:The developing sheet 38 is overlapped with a microcapsule sheet 37 exposed and supplied to a pressure developing device 20. A latent image on the microcapsule sheet 37 is developed and transferred onto the developing sheet 38. In a heat fixing device 15, the heater 30 heats wind blown from an air blower 29 and the hot wind heats the developing sheet 38 so that coloring is promoted. When a jam sensor detects jamming of the developing sheet 38 or of the microcapsule sheet 37, or when a door switch detects opening of a door, a CPU immediately stops energizing the heater 30 and the air blower 29 is continuously rotated and driven. Thus, an excellent image can be obtained and safety can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus that forms an image on a photosensitive recording medium based on predetermined image information.

[Prior Art] Conventionally, this type of image forming apparatus irradiates a document with light and forms an image of the reflected light or transmitted light on a photosensitive recording medium through an optical system such as a reflecting mirror, a filter, or a lens. A device is known that is configured to form a latent image or a visible image on the photosensitive recording medium. Specifically, U.S. Patent No. 4399
In the device using the photosensitive pressure sensitive recording medium (consisting of a photosensitive pressure sensitive sheet and color developer paper) proposed in the specification of No. 209,
A latent image is formed by exposure on a photosensitive pressure-sensitive sheet as a photosensitive recording medium, a developer paper is placed on the surface on which the latent image is formed and pressure is applied, and the developer paper is then heated to form the desired developer image. I was getting . This pressure processing is generally called pressure fixing, and a pressure roller is used. The heat treatment is generally called heat fixing, and a heat roller is used.

[Problem to be solved by the invention]

However, when the surface of the color developer paper coated with the color developer becomes sticky when heated, the image may be transferred to the heat roller, making it impossible to obtain a good image.

The present invention has been made in order to solve the above-mentioned problems, and provides an image forming apparatus that can obtain good images by heating developing paper in a non-contact manner and is highly safe. The purpose is to

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention is provided with a hot air heating means consisting of a fan and a fan heater for heating the color developing paper, and in the event of an abnormality, the image forming apparatus of the present invention energization was stopped, and the fan was turned on.

[Function] According to the present invention having the above configuration, by heating the developing paper without contact, it is possible to promote color development and make the image glossy.In addition, in the event of an abnormality, the power supply to the heater is stopped and the Since the fan is activated, there is little risk of paper etc. catching fire, and safety is high.

[Examples] Hereinafter, examples will be given to explain the present invention more specifically.

The drawing is a schematic cross-sectional view of a photosensitive pressure-sensitive copying machine that is capable of full-color copying. Incidentally, a photosensitive paper (consisting of microcapsule paper and developer paper) that enables such copying has been proposed in Japanese Patent Application Laid-Open No. 58-88739, and will not be described in detail here.

As shown in the figure, the photosensitive and pressure-sensitive copying machine 40 is composed of a document table glass 2 and a document table cover 1, the top plate of which is movable in the horizontal direction.A desired document is placed face down on the document table glass 2. Can be placed in any condition. A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the document table glass 2 and a semi-cylindrical reflecting mirror 4 arranged to surround it is fixed to the upper right side of the copying machine 40. Light is irradiated in a line toward the document table glass 2.

Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction. The light emitted from the light source passes through the transparent original platen glass 2 and is reflected by the original placed on it. A document table cover 1 is provided to cover the document table.

In addition, in order to use the light emitted from the halogen lamp 3 to irradiate the original with high efficiency, a beam flap 5 is arranged to the left of the light source, and reflects the light that is not directed directly toward the original and uses it again to irradiate the original. .

A fan 6 and a louver 7 are provided to the right of the halogen lamp to draw air from the outside. As a result, air can be efficiently applied to the document table glass 2. halogen lamp 3
The light reflected from the original placed on the original platen glass 2 passes through the filter 8 and enters the lens 9. The filter 8 is used to change the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjust the color tone of the copied image. The lens 9 is attached to a lens mounting plate 10, and allows minute angle adjustment with respect to the optical path.

The light focused by the lens 9 is turned 180° by two reflecting mirrors 11 and is imaged on a microcapsule paper 37 closely positioned below the exposure table 19. The two reflecting mirrors 11 are fixed to a mirror mounting plate 12, and the optical path length and focus are adjusted by finely adjusting the mounting position of the mirror mounting plate 12.

On the other hand, a long microcapsule paper 37 is wound around a cartridge shaft 14 and housed in a removable cartridge 13 placed below the document table glass 2.
One end thereof passes through a number of rollers and a pressure developing device 20 and reaches a winding shaft 25 .

That is, the microcapsule paper 37 coming out from the lower part of the cartridge 13 is transferred to the feed roller 15 and the Tyco roller 1.
7 and passes below one exposure stage, then is supplied to the pressure developing device 20. Thereafter, the microphone capsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding shaft 25. The unexposed microcapsule paper 37 after leaving the cartridge 13 is maintained in an unexposed state by the light shielding cover 16.

The transport speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22, and is made to match the moving speed of the document platen glass 2, so that the microcapsule paper 37 is Latent images of predetermined lines of the document are sequentially formed.

Further, below the pressure developing device 20, a color developer paper cassette 32 is provided that accommodates a cut paper type color developer paper 38. The tip 32a of the developer paper cassette 32 differs depending on the type of developer paper, and a developer paper discriminator 50 fixed to the main body of the copying machine 40 determines the type of developer paper from the shape of the developer paper cassette 32. The color developer paper 38 is taken out one by one by the half-moon roller 33, the leading end of which is aligned by the color developer paper roller 34 and the registration gate 35, and then conveyed to the paper inlet of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 37.
The color developer paper 38 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 20 is composed of a small diameter roller 2] and a backup roller 31. The microcapsule surface on which the latent image of the microcapsule paper 37 is formed and the color developer paper 3
The roller 8 is sandwiched between the small-diameter roller 21 and the backup roller 31 while being in contact with the developer-coated surface of 8 on the inside, and pressure is applied thereto. This pressure destroys the unexposed microcapsules and forms an image on the developer paper 38.

The microcapsule paper 37 and the color developer paper 38 that have come out of the pressure developing device are conveyed by a capsule paper feed roller 22, and the microcapsule paper 37 and the color developer paper 38 are separated by a peeling roller 23 in an upward direction and a color developer paper 38 in an orthogonal direction. After color development is promoted by the heat fixing device and an image is formed on the color developer paper 38, the paper is conveyed to the paper discharge tray 27 with the image side facing up. Heat fixing device 5
1 is composed of a heating section 28 having a heater 30 and a blower fan 29 therein, and a group of developing paper feeding rollers arranged before and after the heating section 28.

The separated microcapsule paper is moved to a meandering adjustment roller 24.
The film is then wound around the winding shaft 25.

The operation of the device configured as described above will be explained below.

Now, after opening the document platen cover 1 and placing the original on the document platen glass 2, press the start button.The document platen glass 2 will move to the right in FIG. Stop at a position facing the light source. Thereafter, with the halogen lamp 3 turned on, the document table glass 2 is moved to the left. The light emitted from the halogen lamp 3 is reflected by the original, then reflected by the filter 8, lens 9, and two reflection mirrors 11, and then formed into an image on the microcapsule paper 37 located below the exposure table 19. be done.

At this time, the microcapsule paper 37 is placed on the document table glass 2.
Since the microcapsule paper 37 is moved to the right on the exposure table 19 at the same speed as the moving speed of the microcapsule paper 37, the image on the document is formed as a latent image. As the platen glass 2 moves to the left, the half-moon roller 33 takes out the developer paper 38 from the developer paper cassette 32 and supplies it to the pressure developing device 20 in a state where it is overlapped with the exposed microcapsule paper 37. The latent image on the capsule paper 37 is developed and transferred onto the developer paper 38.

Thereafter, the developer paper 38 enters the thermal fixing device 51.

In the heat fixing device 51 , the air sent from the blower fan 29 is heated by the heater 30 and applied to the color developer paper 38 . The color developing paper 38 is heated by this hot air, and color development is promoted. Further, the surface resin layer of the color developing paper 38 is heated and melted to smooth the surface.

The surface resin layer is solidified by natural cooling after the color developer paper 38 passes through the hot air, forming a smooth surface and a glossy surface. By shielding the heat fixing device 51 from the outside, the hot air that heated the color developing paper 38 can be sent again to the blower fan 29 to circulate the hot air. This can reduce power consumption.

On the other hand, the microcapsule paper 3 that has passed through the pressure developing device 20
7 are sequentially wound around the winding shaft 25.

When the original platen glass 2 finishes moving to a position where its right end faces the light source, copying of the original is completed and the main lamp 3 is turned off.

Next, referring to FIG. 1, the control of the heat fixing device 51 will be mainly explained. (Central control unit) 61 controls the energization drive. The CPU 61 also includes a jam sensor 62 for detecting a jam in the developer paper 38 or microcapsule paper 37, a developer paper sensor 63 for detecting the presence or absence of the developer paper 38 in the developer paper cassette 32, and a developer paper sensor 63 for detecting the presence or absence of the developer paper 38 in the developer paper cassette 32. A door switch 64 and the like for detecting opening/closing is connected. Further, the heat fixing device 51 is provided with a thermistor 65 to control the temperature of the heater 30.
It is configured to feed back to the PU61.

In the apparatus configured as described above, when the copying machine is powered on, the CPU 61 normally turns on the heater 3.
0, the blower fan motor 60 and color developing paper feed roller motor 66 are driven to rotate, and the air sent by the blower fan 29 is heated. The temperature of this wind is detected by the thermistor 65, and the CPU 61 controls the power supply to the heater 30 so that this temperature is substantially constant.

Next, when the jam sensor 62 detects a jam in the developer paper 38 or the microcapsule paper 37 or the door switch 64 detects that the door is opened, the CPU 6
1 immediately stops energizing the heater 30, and continues to rotate the blower fan motor 60 and the developing paper feed roller motor 66. As a result, the temperature of the heat fixing device 51 gradually decreases, causing the color developing paper feed roller to deform,
Alternatively, there is no risk of paper such as developer paper 38 catching fire inside the copying machine.

The present invention relates not only to an image forming apparatus using reflected light from an original as described above, but also to an apparatus that forms an image by exposing an original and a light-sensitive pressure-sensitive medium in close contact with each other, and, for example, Japanese Patent Application No. 1986-11
It goes without saying that the present invention can also be applied to an apparatus such as that shown in No. 3877, which forms an image by contact exposure using a color separation mask original plate for a color original.

[Effects of the Invention] According to the present invention having the above-mentioned configuration, the type of color developing paper is determined and copying conditions suitable for its characteristics are set to perform heat treatment, so that good images can be obtained. In addition, in the event of an abnormality, the power supply to the heater is stopped and the fan is driven, so there is little risk of paper or the like catching fire, and safety is high.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the control relationship of the image forming apparatus of the present invention, and FIG. 2 is a schematic diagram of the image forming apparatus. In the figure, 1 is a manuscript cover, 2 is a manuscript glass, 20 is a pressure developing device, 28 is a heating section, 29 is a blower fan, 30 is a heater, 37 is a microcapsule paper, 38 is a color developer paper,
40 is a copying machine, and 51 is a heat fixing device.

Claims (1)

[Scope of Claims] 1. A photosensitive pressure-sensitive medium whose surface layer supports photocurable microcapsules containing a dye precursor and a photosensitive substance, and a color developer capable of causing a color reaction with the dye precursor. An image forming apparatus for forming an image on a color developing medium using a color developing medium having a material supported on its surface layer, which is equipped with a hot air heating device consisting of a fan and a heater as a means for heating the color developing medium, An image forming apparatus characterized in that the power supply to the heater is sometimes stopped and the fan is kept in a driving state.