JPH0416847A - Image forming device - Google Patents

Abstract

PURPOSE:To eliminate the wasting of forms by inhibiting new developing paper from being fed when a decision means decides an error state and then displaying the error state on a display means after the developing process of developing paper which is already entered. CONSTITUTION:This device is provided with the top/reverse decision means 40 which decides the top and reverse sides of the developing paper and the display means 140 which displays the error state. Then when the top/reverse decision means 40 decides the error state, the new developing paper is inhibited from being fed and the error state is displayed on the display means 140 after the developing process of the developing paper which is already entered. Thus, the discharging of recording paper from the device is confirmed and then if an error to be displayed occurs, the recording paper in the middle of the process in the device is not wasted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus, and more particularly, to error processing when paper is fed with the wrong front and back sides during continuous copying.

[Prior Art] Conventionally, image forming apparatuses have been configured to display an error message and immediately stop the apparatus when front and back sides are detected.

[Problem to be solved by the invention] However, if a front/back detection error occurs during continuous copying, the device will immediately stop, and the paper that was developed first will be disposed of as a jam, resulting in wasted paper. There was a problem.

The present invention has been made to solve the above-mentioned problems, and even if a front/back detection error is detected during continuous copying, the previously developed paper is not jammed, but the image forming process is completed and output. The goal is to eliminate paper waste.

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention has the following features:
In an image forming apparatus having a development process in which a photosensitive pressure sensitive paper that forms a latent image using light is superimposed on a color developer paper fed by a paper feeder and developed, a front and back determination means for determining whether the developer paper is front and back, and an error. When an error state is determined by the display means for displaying the state and the front/back determining means, feeding of new color developer paper is prohibited, and the development process of the color developer paper already in the development process is completed. and control means for later displaying an error state using the display means.

[Function] The image forming apparatus of the present invention prohibits the feeding of new color developer paper when the front and back determination means determines that the front and back sides of the color developer paper fed by the paper feeding device are not in a normal state, and After the developing process of the developing paper in the process is completed, the error state is displayed by the display means.

[Example code] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments embodying the present invention.

In the photosensitive and pressure sensitive copying machine 1 of this embodiment, as shown in FIG.
and color developer paper 28 (hereinafter referred to as recording paper) are used.

Note that the microcapsule paper 12 used in this example
The surface of the support is coated with microcapsules, and the microcapsules contain dye precursors and the like that react with the color developer described below. A color developer is coated on the surface of the support of the recording paper 28 and develops color by reacting with a dye precursor.
It is described in the specification of No. 209, etc., and will be omitted here.

At the top of the copying machine 1, there is a document table glass 2 and a document table cover 3.
A desired original 4 is placed on the original platen glass 2.
is placed face down and the document table cover 3 is closed. Furthermore, a panel (not shown) is provided on the top of the copying machine 1, and an error indicator light 140 indicating a paper jam or the like and operation keys are provided.

A halogen lamp 5a and a reflector 5b are provided below the document table glass 2 in the upper part of the copying machine 1.

A light source section 5 including a reflecting mirror 8 is disposed so as to be movable back and forth along a shaft 13 extending parallel to the document table glass 2. The light source unit 5 irradiates light onto the document table glass 2 in a line in a direction perpendicular to the moving direction.

The irradiated light passes through the transparent document platen glass 2 and is reflected downward by the document 4 placed thereon.

A mirror portion 9 including reflective mirrors 9a and 9b is disposed below the document table glass 2 and is movable separately from the light source section 5, and the light reflected from the document 4 is reflected by the reflective mirrors 8.
9. 9b, and are guided in parallel to the moving direction of the light source section 5.

A normally fixed projection lens 7 and a filter 6 for adjusting the color tone of the copied image are disposed below the document table glass 2, and the light reflected by the reflection mirror 9b is directed to the projection lens 7. incident.

The light projected by the lens 7 passes through a group of reflective mirrors 10
a and 10b.

An exposure stage 11 for exposing the microcapsule paper 12 is disposed to the right of the reflective mirror 10b, and a reflective mirror 10c for switching the optical path is disposed between the reflective mirror 10b and the exposure stage 11. ing. Image information on the document 4 is formed on the microcapsule paper arranged along the exposure table 11.

In addition, the reflecting mirrors 10a and 10b are normally fixed, but are set when enlarging or reducing the size of the latent image formed on the microcapsule paper 12, and change the optical path length according to a change in the projection magnification m. Therefore, they are configured to be able to move together in the axial direction of the shaft 13.

On the other hand, a cartridge 15 is disposed in the center of the copying machine 1, and the elongated microcapsule paper 12 is housed in the cartridge 15, which is removable from the machine while being wound around the cartridge shaft 14. With the cartridge 15 set at a predetermined position within the machine, the leading end of the microcapsule paper 12 is pulled out toward the exposure table 11.

A feed roller 19 and a dancer roller 21 for tension adjustment are provided below the exposure table 11. To the right of the dancer roller 21, a pressure developing device 22 including a large diameter roller 22a and a backup roller 22b is arranged. Microcapsule paper 12 and recording paper 2
A separation roller 23 for separating the microcapsule paper 12 from the microcapsule paper 12 is provided between the separation roller 23 and the cartridge 15, and a winding shaft 24 for inserting and holding the microcapsule paper 12 therein. The microcapsule paper 12 that comes out of the upper part of the cartridge 15 is guided by a tension roller 19, passes above the exposure table 11, and then passes through a dancer roller 21.
, a pressure developing device 22 , and further guided to a separation roller 23 , and then wound onto a winding shaft 24 . Note that the unexposed microcapsule paper 1 after leaving the cartridge 15
2 is maintained in an unexposed state by a light-shielding cover. A paper feed cassette 29 containing recording paper 28 is installed below the pressure developing device 22 . Above the paper feed cassette 29, a suction cup-type paper feed mechanism 30 that sucks paper using negative pressure suction is arranged, and the recording paper 28 is taken out one by one by the paper feed mechanism 30. A feed guide 31d1 and a feed roller 31a are provided between the paper feeding mechanism 30 and the pressure developing device 22.
.

31b, 31c, and a front/back discrimination sensor 40 are provided, and the recording paper 28 is sent to feed rollers 31a, 31b.

31C1 is conveyed by the feed guide 31d and carried into the pressure developing device 22. At this time, the recording paper 28 passes under the front/back discrimination sensor 40.

A heat fixing device 32 is disposed to the right of the pressure developing device 22, and a paper discharge tray 33 for storing the recording paper 28 on which an image is formed is disposed to the right of the heat fixing device 32. There is.

Further, this copying machine has an autoloading function for automatically setting the microcapsule paper 12 on a predetermined transport path within the apparatus. This is a function that automatically pulls out the leader film portion attached to the tip of the microcapsule paper 12 into the device, transports it inside the device, and winds it around the winding shaft 24. As a result, the microcapsule paper 12 following the leader film section 18 is also wound up on the winding shaft 24, and the setting into the apparatus is completed.

For this automatic loading, a half-moon roller 17 is provided between the roller 19 and the cartridge 15 for pulling out the leader film section, and a separation chute 27 is rotatably attached to guide the take-up shaft 24. ing. Around the winding shaft 24, a machining guide 25 and a machining guide 26 are arranged for winding the leader film.

Next, the front/back discrimination sensor will be briefly explained. FIG. 2 is a schematic sectional view of the front/back discrimination sensor 40, and FIG. 3 is a detection circuit. Light emitting element 41 and light receiving element 4
2 are disposed in close contact with the optical path guide 46 at a certain distance apart and facing each other so that the incident angle and reflection angle are 60 degrees with respect to the recording paper 28. The circuit shown in the figure is arranged. The circuit shown in FIG. 3 is a circuit for detecting the reflectance of the recording paper 28, and is composed of a light emitting element 41, a light receiving element 42, an amplifier 43, a constant current circuit 44, and the like. In FIG. 3, Vref is a reference voltage for driving the light emitting element with a constant current, and the light emitting element 41 is driven with a constant current by this value. The light emitted from the light emitting element 41 is reflected by the recording paper 28 and reaches the light receiving element 42. Then, it is amplified by an amplifier 43 and outputted as VOut.

The output Vout is manually input to a CPU equipped with an A/D converter of a control device, which will be described later, and the control device determines whether the paper is front or back according to the value.

In other words, when the angle of incidence (reflection) on the light emitting element 41 and the light receiving element 42 is around 60 degrees, the output ratio between the front and back sides of the recording paper 28 (front output/true output) is approximately 30%, so the output The control device determines whether the recording paper 28 is front or back according to the ratio.

Next, the electrical configuration will be shown using the block diagram of FIG.

The control device 100, which is composed of a CPLJ with an A/D converter, ROM, RAM, etc., includes a front/back discrimination sensor 40 that detects the front and back sides of the recording paper 28 via the I10 port 110.
and a pressure control section 120 that controls the pressure developing device 22. A heat fixing control section 130 that controls the heat fixing device 130. roller 3
A roller control section 310 that drives and controls the rollers 1a to 31c is connected to an error indicator light 140 that displays an error.

Next, the operation of this copying machine will be explained.

When the cartridge 15 is set in the copying machine, autoloading starts.

The half-moon roller 17 rotates once to several times in the conveyance direction only at the start of autoloading, and feeds the leader film section 18 to the roller 20. After that, it stops, and subsequent conveyance is performed by driving the rollers 20.

The makitori guide urchin 25, the makitori guide sitter 26, and the separation chute 27 rotate to the positions shown by the - dotted chain line, and the leader film portion 18 attached to the tip of the microcapsule paper 12 is wound around the winding shaft 24. When the autoloading is completed, the machining guide urchin 25, the machining guide sitter 26, and the separation chute 27 return to the positions indicated by solid lines, and copying becomes possible.

When the copy start key is operated, the reflection mirror 8
, the halogen lamp 5 has a moving speed (1/m) where the transport speed of the microcapsule paper 12 is v1 and the projection magnification is m.
・Moves at V, and reflective mirrors 9a and 9b move at a moving speed (1/
2 m) ・Move with V.

The conveyance speed of the microcapsule paper 12 is determined by the mirror group 8.9a.
, 9b is synchronized as described above,
Latent images of predetermined lines of the document 4 are sequentially formed on the microcapsule paper 12 as it passes through the exposure stage 11 . Note that the predetermined speed ratio is predetermined based on the setting of the magnification.

The microcapsule paper 12 on which the latent image has been formed is transported,
The uppermost recording paper 28 of the paper feed cassette 29 is fed to the paper feed mechanism 30
, feed rollers 31a, 31b, 31c, and the like. Then, the recording paper 28 is detected by the front/back detection sensor 40.
When passing the recording paper 28, the reflectance of the recording paper 28 is read by the circuit shown in FIG. 3, and the control device 100 determines whether the recording paper 28 has passed correctly or on the wrong side. Then move on to subsequent processing.

If it is determined correctly, the microcapsule paper 12 and the recording paper 28 are supplied to the pressure developing device 22 in a state in which they are in close contact with each other and are integrated, and the latent image of the microcapsule paper 12 is formed on the surface of the microcapsules and recorded. The large diameter roller 22 is integrally moved with the color developer coated surface of the paper 28 in contact with the inside.
a and the backup roller 22b, and pressure is applied.

This pressure destroys the unexposed microcapsule paper and forms an image on the recording paper 28.

The microcapsule paper 12 and the recording paper 28 that have come out of the pressure developing device 22 are separated by the separation roller 23, and then the recording paper 28 is accelerated in color development by the heat roller 32a of the heat fixing device fif 32 to form an image. After that, remove the paper ejection roller 3.
2b, the paper is transported to the paper discharge tray 33. Note that the separated microcapsule paper 12 is wound up on a winding shaft 24 via a separation roller 23e.

If it is determined that the recording paper 28 has passed on the wrong side, the conveyance of the feed rollers 31a, 31b, and 31c is immediately stopped. If there is no other recording paper 28 in the apparatus, the error indicator light 140 on the panel is turned on.

In addition, if the recording paper 28 is in the process of continuous copying or the like in the apparatus, that is, if it is determined that the pressure control section and the heat fixing control section are in operation, the error indicator light 140 on the panel will immediately turn on. Rather than turning on the green process (pressure development).

After the recording paper 28 has passed the paper discharge roller 32b, the error indicator light 140 on the panel is turned on.

The present invention is not limited to the embodiments detailed above, and various changes can be made without departing from the spirit thereof.

For example, the timing at which an error is generated does not have to be after the recording paper has completely passed through the paper ejection roller.

[Effects of the Invention] As is clear from the detailed description above, the present invention displays an error after confirming that the recording paper in the device has been ejected. There is no need to waste recording paper.

[Brief explanation of the drawing]

1K to 4 show embodiments embodying the present invention, and FIG. 1 is a schematic configuration diagram of an image forming apparatus, and FIG.
The figure is a schematic sectional view of the front/back discrimination sensor, FIG. 3 is a detection circuit of the front/back discrimination sensor, and FIG. 4 is a block diagram showing the electrical configuration. In the figure, 40 is front/back discrimination means, 100 is a control device, 120
Reference numeral 130 indicates a pressure control section, 130 indicates a heat fixing control section, and 140 indicates an error indicator light.

Claims (1)

[Claims] 1. In an image forming apparatus having a development process in which a photosensitive pressure-sensitive paper that forms a latent image using light is superimposed on a developer paper fed by a paper feeder to develop the paper, a front-side determining means for determining whether the developer paper is front or reverse; , a display means for displaying an error state, and when the front/back side determining means determines that an error state exists, prohibiting feeding of new color developing paper;
An image forming apparatus comprising: a control means for displaying an error state on the display means after the development process of the color developing paper already in the development process is completed.