JPS5866959A - Tow-mode copying apparatus - Google Patents

Abstract

PURPOSE:To execute 2-mode copying with a compact, inexpensive, and reliable apparatus, by adding only a digital light emitting means to constitute a digital copying mode apparatus. CONSTITUTION:An original is set to a prescribed position on a contact glass 2 with an automatical original feeder 16 or manually. Each copying step is operated, the first and the second carriages are scanned from the right to the left to form an original image continuously on the surface of a photoreceptor 3 rotating in the arrow direction and charged with a charger, and an analog type electrostatic latent image corresponding to an original image is formed. The static latent image is developed with a developing device 7, transferred to a transfer paper 8 fed at a presribed timing with a register roller 9 through a transfer charger 10, the image transferred paper is separated from a photoreceptor 3, and fixed with fixing rollers 14 to complete an analog copying operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to analog copying, digital copying, and 02 mode copying apparatus.

In recent years, as copying apparatuses have become more multi-functional, there are two-mode copying apparatuses that allow analog copying and digital copying to be performed selectively. Looking at conventional examples, 1 normal analog copy mode uses normal optical imaging means, and digital copy mode uses optical imaging means consisting of a laser oscillator, a polarizer such as a rotating mirror, an optical modulator, and k. It is something. In this way, 2m for two copy modes
It requires l different optical imaging means, is complex and unreliable, requires a large amount of space, and is expensive. In other words, variable-magnification copying such as enlargement and reduction in digital copy mode requires controlling the generation of the optical signal itself, and the calculations for this require a large amount of memory and time.
It will be quite expensive. Regarding this point, it is conceivable to add a variable magnification means to the six-optical combination means for digital copy mode, but this would be more expensive and complicated. Furthermore, when variable-magnification copying in the digital copy mode is performed by controlling optical signals, if the digital light emitting means is array-shaped or matrix-shaped, the variable magnification is limited. For example, a 50 inch reduced copy reproduces well, but a 98 inch
When trying to obtain a %-reduced copy, it is virtually impossible because the pitch of the light emitters cannot be made that fine, and after all, the magnification can only be changed in steps.

The present invention has been made in view of these points, and is compact and inexpensive, enables two-mode copying, and furthermore,
It is an object of the present invention to provide a two-mode copying apparatus that can steplessly change the size of a c#'i digital copy.

The present invention constitutes a basic configuration for an ANMIG copy mode by a photoreceptor, an optical imaging means, and an original image holding means for holding an original image, and uses a part of the optical imaging means in common to create a digital light emitting means. By using it for copy mode, there is no need for optical imaging means dedicated to digital copy mode! In this case, if the optical imaging means has a variable magnification function, the variable magnification function can be used as is in the digital copy mode. It is configured so that it can be done.

A first embodiment of the present invention will be described based on FIGS. 1 to 3. First, a contact glass (2) is provided at the top of the copying machine body (2) as a holding means for holding the original image, and inside is a drum-shaped photoreceptor (3) that rotates in the direction of the arrow.
) is provided. here.

Around the photoreceptor (3), according to the copying process, a charger (4), an eraser lamp (5), and an optical imaging means (6) are installed.
), current device (7), registration roller (9) that feeds the transfer paper (8), transfer charger α1, separation conveyance bell) Q
υ, a cleaning device (2), and a quench lamp (to) are provided in this order, and a fixing roller α◆ is provided on the side of the separation conveyance bell) DI. Further, on the contact glass (2), there is provided an automatic original image feeding device (B) which is constructed mainly of a conveyor belt (B) and is openable and closable.

Thus, said optical imaging means (6) comprises an optical imaging element;
It consists of four elements: a scanning element, a variable magnification element, and an illumination element. First of all, light, academic conclusion @l! The element is the first mirror clη
, second mirror Ql, third mirror (6), lens ■, fourth
The contact glass (2) and the photoreceptor (3) are set to have an optically conjugate relationship. The lighting element consists of a lamp) and a reflector. Here, the first mirror and the reflecting plate are integrated by a first carriage (2) that is slidable on the guide shaft. 9, 2nd mirror 4 and 3rd mirror 2
- (to) is integrated with the guide shaft -KWi by a freely movable second carriage (e). And the lens ■
is semi-fixed along the guide shaft (b) so that its position can be freely changed. The scanning element is then driven by a drive motor (c)
The driving source is the drive pulley H of the drive motor (2), which is wound around the drive pulley H of the drive motor (2) through the pulley 4 provided on the second carriage), the first carriage (C), and the idler pulley ■. The wire (to) passes through (2) and is wound around the pulley @, and similarly passes through the pulley (b), the first carriage 4, and the idle pulley (to) ■ to the drive pulley o.
The wire (2) is wound around the pulley 04 through the idle pulley @ (to) while being wound in a IIIC manner. Here, it is fixed to the semi-fixed pulley frame for variable magnification via a tensioning pulley (g) which is biased by a spring (to) trap at both ends of the wire (to) (b). In addition, the variable magnification element is a variable magnification motor 6υ
The drive source is the semi-fixed pulley for variable magnification fixed to the shaft wheel, a wire wound around this shaft wheel, and the other end of this wire connected to the shaft via the idler pulley. The control plate is wound around a ring and controls the lens @I. Here, the drive motor is equipped with a two-phase encoder that gives position information to the first carriage.
is installed.

Also, inside the copying machine body (1) is a first carriage (E).

Therefore, a home position detector is provided to detect the return of the first mirror 1 flaw η to the home position.

An LED array serving as digital light emitting means is provided outside the contact glass (2). This tm array shares the optical imaging means (6) except for the illumination element, and its light emitting part is connected to the photoreceptor (6) through the lens 4, facing the first mirror (b) which is placed at the home position. 3) The upper imaging point (set to have an optically conjugate positional relationship with the three). Note that the cormorant is an operation display panel provided at the top of the copying machine main body (1).

Next, the control system is configured as shown in FIG. First, due to the controversy over address, data, and various signal buses, the oscillation circuit, CPU1, and backup power supply are connected to the 9ν real memory i (4, i, ,+-).
v-li 2 so, ROM 1 v), ROM 2 m, programmable counter timer circuit/road wheel, character generator, external communication interface ■, matrix input circuit instant, output interface circuit -, interrupt input control circuit -1 Input/output interface 7 ace circuit-1 output interface circuit-1 input interface circuit (2) and output interface circuit (2) are connected. Here, a group of switches on the operation display panel are connected to the matrix input circuit. At the front, a variable magnification motor υ is connected to the output interface circuit through a motor drive circuit receiving a forward rotation signal and a reverse rotation signal. The interrupt input control circuit receives signals from the two-phase encoder. Also.

The input/output interface circuit receives signals from the two-phase encoder and home position detector, and outputs forward/reverse direction instruction signals and speed information bits 0 to 3 to the motor drive circuit. , and further provides a lighting instruction signal to the lamp (2) via the lamp regulator 4.

Then, Ia is connected to the output interface circuit through segment drive circuit 0 and group drive circuit q4.
array is connected. others.

A group of sensors qI9 is connected to the input interface 7 ace circuit, and a group of output devices (
) are connected.

In any configuration, the selection of analog copy mode or digital copy mode is performed by suppressing a group of switches on an operation display panel group or by an external signal inputted to an ear interface for external communication. Now, considering that analog copy mode is selected,
An original image is statically set at a predetermined position on the contact glass (2) by an automatic original image feeder QQK (or manually).

Then, by operating each copying process and scanning the first carriage (2), second carriage) from the right side to the left side by the drive motor (7), the charger (4)
The photoreceptor (3) is charged by K and rotating in the direction of the arrow.
) When the phoenix image is continuously formed on the surface and an analog-like static image corresponding to the original image is formed, it becomes K. This electrostatic charge is converted into an image by the current device (7) K, and then transferred by a transfer charger onto a transfer paper (8) fed at a predetermined timing by a registration roller (9).

Then, the transferred transfer paper (
8) is separated from the photoreceptor (3) and sent to the fixing roller Q4 for fixing, thereby completing the analog copying operation.

Let us look at the magnification change, scanning, etc. of the optical coupling means (6) using and ζ. First, if the surface peripheral speed of the photoconductor (3) is vPO and the variable magnification is divided, then the optical path between the contact glass (2) and the lens 4 and the optical path between the lens 4 and the photoconductor (3) The zoom semi-fixed boot 9- is rotated forward or reverse by the zoom motor 11Vc so that the two are optically conjugate. 9. For example, if the positions of the second mirror 01, the third mirror (toward), and lens 4 shown by solid lines in FIG.
The semi-fixed pulley M for variable magnification (to the second carriage via the pulley 04 via the wire OIOη) is moved to the right by rotating the shaft ring clockwise, while the control plate - is rotated via the wire. Lens G! Move Q to the left and place the second mirror and third mirror at the positions indicated by the dashed line in Figure 1.
By positioning the mirror (2) and lens 4, the optical conjugate relationship for reduction is maintained. When enlarging, the magnification motor @
This is done by rotating the lens in the opposite direction, and it can be set steplessly to reduce or enlarge the image. Here, as the variable magnification motor υ, a motor that generates holding torque at any position, such as a stepping motor, is optimal, but a clutch or the like may be used to hold the semi-fixed pulley ■ for variable magnification. If the clutch is turned OFF when resetting to a new variable magnification position, a normal motor with zero torque when stopped can be used. Depending on the operation of the operation display panel wheel or external signals input to the external communication interface.

After setting the desired magnification in this way, it becomes possible to optically scan the original image. First of all, @Imirror (b) is (
The circuit system shown in FIG. 3 controls the operation so that the home position is located at the home position shown in 17a), and when the print button on the operation fitting spring is pressed there, the scanning speed is set to the appropriate scanning speed, that is, the one-time line for full-size copying is set. 1st carriage 4 is V
Speed information such that the PO1 second carriage (E) has a speed of VPO/2 is sent to the motor drive circuit Q by bits 0 to 3.
given to. As a result, the drive motor is servo-controlled to achieve its target speed, and at the same time, the position information of the first carriage is obtained by counting the output of the two-phase encoder. Here, the reason why this two-phase encoder complement is two phases and one is delayed by π/2 from the other is to determine the rotation direction, and the absolute position is determined based on the base position with the home position detector. It will be held in In this way, the first mirror CLη changes from (17&) to (174
), it is possible to change the length as needed, and it is desirable to scan only a necessary and sufficient length in order to improve the copying speed, and reach the position shown in (174). After that, a return to the home position &(174) is achieved by giving a reverse rotation instruction signal to the motor drive circuit n. This return speed is generally set much higher than KvPo in order to improve copying efficiency. Further, the lamp (2) is lit for a period corresponding to the scanning of the original image (on the carriage).

Next, let's talk about the digital copy mode.

First, regarding the position of the LH mirror array, this position is outside the contact glass (2) for setting the original image in analog copy mode, and therefore the first mirror Q'i) is If the camera returns to the home position shown in (17a), it is advantageous because no operation is required to newly set any special positional relationship.

However, if the LED array 4 is so large that if placed at the position corresponding to the home position, it would overhang the top of the copying machine body (1) and interfere with the automatic original image feeder αQ, the LFJ) array When the digital copy mode is selected, the first mirror aη is scanned to the left of the position shown by (174) and facing the LID array. It may be made to stop at a certain position. 9. If there is any problem, such as array 1 being larger, move array U to automatic original image feeder 01.
11 may be provided. According to this, the copying machine body (1)
Since there are no protrusions on the top and the automatic original image feeder (2) can be opened and closed, dirt on the tX can be easily cleaned.

First, the variable magnification ratio is set, which is the same as in the analog copy mode, and is performed by forward and reverse rotation of the variable magnification motor@umbrella. Then, the copy operation begins. This copy operation is the same as in the analog copy mode, but it stops at the home position shown by the first mirror (17&) and reaches 9t, the drive motor ■ does not operate, and lamp 4 remains off. It will be held in That is, the charged photoreceptor (3) rotates at a speed of VPO in the sub-scanning direction (arrow direction);
), the LH array 4 is dividedly scanned in the main scanning direction by the segment drive circuit 0 and the group drive circuit q◆ (of course, simultaneous scanning is also possible).

LFJ) point light is the first mirror αη, the second mirror member, and the third mirror member.
Kenra (6), lens (7), 4th mirror? The images are sequentially formed on the image forming point (3a) on the photoreceptor (3) via p, and a digital electrostatic latent image is formed.

Therefore, according to this embodiment, even in the digital copy mode, the optical imaging means (6
), and a separate optical imaging system is not required.
It can be extremely simple and compact, - it can be inexpensive and its reliability can be improved.

In addition, the variable magnification function of the optical imaging means (6) for the analog copy mode can be used as is in the digital copy mode, and it is possible to easily and continuously print the image without using the disadvantageous method of controlling the optical signal itself. It is possible to perform a 1!1 variable size copy. However, when the variable magnification ratio is large, it is more effective to combine such optical variable magnification with variable magnification based on electrical signal processing.

As described above, arbitrary magnification is possible in the digital copy mode, but the amount of light emitted from the LED array (LFJ) is controlled according to the magnification. That is, in the case of a reduced copy, the light emission time is shortened, so that the amount of light emitted is small, and in the case of an enlarged copy, the light emission time is lengthened, and the amount of light emitted is increased. As a result, it is possible to obtain a copy image that looks good regardless of whether it is reduced or enlarged. Also, I of this LII) array
The amount of light emitted by a is also controlled by its position. In other words, the rounding K corrects the light intensity transmission characteristic of the 00!14 rule of lens 4, and the peripheral part Ia located in the longitudinal direction is more emissive than the center part near the center Ia located on the optical axis of the lens (E). Since the amount of light is increased, a better copy image can be obtained.

Note that in this embodiment, the mirror system has an optical imaging means for optical scanning, but it is also possible to use a scanning system using a lens.
Alternatively, an equal pressure system in which the image forming element is fixed and the document table is moved can be similarly applied.

Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is applied to a full-surface exposure type copying apparatus, and a belt-shaped photoreceptor is provided within the apparatus and is supported by a guide rod and rotates in the direction of the arrow. Here, the circumference (K) of the photoreceptor 0 is a charger 4, an optical image forming means 4, a horizontal eraser υ, a vertical eraser, a current device, and a registration roller 2 that feeds transfer paper according to the copying process. A transfer charger (2), a separation charger (2), a fixing roller (2), and a cleaning device are provided.

On the other hand, a contact glass e is provided at the top of the copying machine body as a holding means for holding an original image, and an automatic original image feeding device which is constructed mainly of a conveyor belt and can be opened and closed on the contact glass eυ is provided. is provided.

Thus, the optical imaging means consists of three elements: an optical imaging element, a variable magnification element and an illumination element. First, the optical imaging elements include a first mirror, a second mirror, and a second mirror.
The contact glass ρ and the straight portion of the photoreceptor are set to have an optically conjugate relationship. The illumination element is composed of a plurality of lamp powders arranged to expose the entire surface of the contact glass eJ). t'#-1 The variable magnification element is a lens and a second mirror.
A motor (101) having a pinion (2) that engages with a guide rod that is slidably supported so that the position can be changed, a rack on both sides of the lens, and a rack (102) on the second ξ roller side. power from a motor (104) having a pinion (103). On the other hand, an LF that is located outside the contact glass and serves as a digital light emitting means.
J) An array (105) is provided. This LED array (105) except the illumination element shares the optical imaging means, and faces the first mirror HK, and its light emitting part is placed on the photoreceptor (to) #i! through the lens. Til
&) is set to have an optically conjugate positional relationship. Note that (106) is an operation display panel.

In such a configuration, if we consider that the analog copy mode is currently selected, the original image set stationary on the contact glass is fully exposed by the lamp, and the first mirror, lens 1, and second An image is formed on a charged and stationary photoreceptor by turning a mirror, and the electrostatic sa
is formed. Then, the photoreceptor (to) moves again and the ceremonial process is performed. Here, when making a resized copy,
For example, the lens 1 second mirror shown by the solid line in FIG.
If the position of is the same as when the magnification is the same, then the motor (1
01) (104)' If the lens and the second mirror are displaced along the guide rod to the position shown by the dashed line, the optical conjugate relationship for reduction is maintained. Enlargement is performed by rotating the motor (101) (1049) in the opposite direction, but the settings can be made steplessly and variably for either reduction or enlargement.

Next, in the digital copy mode, the LED play (105) is given an image signal for each column and emits light.
The point light is sequentially imaged onto the photoreceptor (to) passing through the focusing point (78a) via the first mirror axis, the lens-1 and the second electric current. Even in this digital copy mode,
Variable magnification copying is carried out by displacing the second mirror of lens 1 by motors (101) and (104), as in the analog copy mode.

Incidentally, in the case of this embodiment, it is also possible to create a combined JiK copy of an analog copy and a digital copy, regardless of whether it is the same size or variable size. That is, in both copy modes, the original 1IIIilI light by the lamp unit and the W array (10
5) is performed at the same time, and after death, the LED array (1
The scanning exposure of 0B) is continuously performed, and an analog 1W image and a digital latent image are formed on the photoreceptor. According to these two copy modes, it is possible to copy the output from the computer by superimposing it on the four-foot of the original image using the digital copy toshi.

In addition, as a digital light emitting means, m play @ (10
5) (D et al. 9 For example, OF'r, usually 0CRT,
LCD with a full-surface light emitting body such as t or FL as a backlight
It may be combined with an array shutter, an EL array, an EL matrix, or the like.

As described above, the present invention forms a basic configuration for an analog copy mode using a photoreceptor, an optical imaging means, and an original image holding means for holding an original image, and while a part of the optical imaging means is shared, a digital light emitting means is provided. Since it is configured for digital copy mode by simply adding , there is no need for an optical imaging means dedicated to digital copy mode, making it possible to perform two-mode copying with high reliability and compactness at low cost.
At this time, if an optical magnification device with a variable magnification function is used, the variable magnification effect can be used as is even in digital copy mode, and continuous stepless variable magnification copying can be easily performed. If a digital light emitting means is used in which the amount of emitted light is controlled accordingly, it is possible to obtain a good copy image without any difference due to magnification.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a first embodiment of the present invention, and FIG.
The figure is a perspective view of the optical imaging means, Figure 3 is a block diagram, and Figure 4 is a block diagram.
The figure is a schematic side view showing a second embodiment of the invention. 2... Contact glass (a image holding means), 3...
Photoreceptor, 6... Optical imaging means, 49... IJD array (digital light emitting hand button, 7B... Photoreceptor, 91...
Contact glass (original image holding means), 8o...optical imaging means, 105...LFJ) array (digital light emitting means) Face People Ricoh Co., Ltd.

Claims (1)

[Scope of Claims] 1. An optical imaging means for forming an electrostatic latent image on a photoreceptor, and an original image held on a surface of the optical imaging means that is optically conjugate with the photoreceptor precious light image. A two-mode copying apparatus comprising an original image holding means and a digital light emitting means that shares a part of the optical imaging means to form an arbitrary digital latent image on a photoreceptor. 2. Use of optical imaging means with variable magnification function 4!
Make it into a statue・%WlfiiiI! The two-mode copying station described in item 1. 3. A two-mode copying apparatus according to claim 2, characterized in that a digital light emitting means is used in which the amount of emitted light is controlled according to a variable magnification ratio.