JPS62194263A - Copying machine - Google Patents

Abstract

PURPOSE:To form a binding margin on both the top and reverse sides of a copying form by providing a control means which performs control so that the directions of binding margins on the top and reverse sides are opposite from each other in both-sides copying mode. CONSTITUTION:An optical system 1 enters return scanning operation after preliminary scanning. The start point of exposure scanning is regarded ad a trigger point for the synchronization between the optical system 1 and a paper feed system and when the 2nd paper feed roller 3 is turned on (t)sec after the trigger point, a copy having no binding margin is obtained. At the time of the 2nd paper feed roller 3 is turned on (t+t0)sec after the trigger point, an image leads the copying form and a blank part is formed as a binding margin at the left end of the 1st side of the copying form. At the time of the 2nd side is copied, the 2nd paper feed roller 3 is turned on (t-t0)sec after the trigger point and then the copying form leads the image, so that a binding margin is formed at the right end of the 2nd side of the copying form. The time from the trigger point to the start of the 2nd paper feeding operation is varied by a timer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a copying apparatus, and more particularly to a copying apparatus capable of double-sided copying.

(Prior Art) An electronic copying device exposes a printed photosensitive drum to light according to document information, and then forms a visible toner image on an electrostatic latent image formed on the drum surface. This is a device that transfers a visual image onto recording paper.

In recent years, this type of electronic copying apparatus has been widely used for information copying in all fields of industry. Recent electronic copying apparatuses are commercially available that have not only an automatic copying function of a preset number of copies, but also a double-sided copying function.

Additionally, devices of this type that have a so-called binding margin function have also been developed. This binding margin function allows binding margins to be created in either the left or right direction in single-sided copy mode.

(Problem to be solved by the invention) However, when trying to create a binding margin in double-sided copy mode, there is only a method that creates a binding margin only when copying the back side (copying the second side), and the binding margin is created on both the front and back sides. There were no copying machines capable of creating . Therefore,
It was impossible to create a binding margin on both the front and back sides of copy paper, so for example, for a manuscript in which images are recorded up to the left edge, creating a binding margin at the left edge would be difficult to create on both sides. - This was not possible for the surface of the surface.

In such a case, it is possible to create a binding margin by shifting the document itself on the document table glass, but it is cumbersome for the user, and it is difficult to use the automatic document feeder <AD.
When using the document F), it becomes impossible to shift the document described above on the document table glass.

The present invention has been made in view of these points, and
The object is to realize a copying apparatus that can create a binding margin on both the front and back sides of a copy sheet when creating a binding margin in a double-sided copy mode.

<Means for Solving the Problems> The present invention, which solves the above-mentioned problems, provides that, in a copying apparatus having a double-sided copying means and a binding margin selection/creation means, when the double-sided copying mode is set, The present invention is characterized in that a control means is provided for controlling the direction of the binding margin of the copy sheet to be copied and the direction of the binding margin of the copy sheet to be copied on the second side to be opposite to each other.

(Function) When the binding margin is selected in the double-sided copy mode, the binding margin direction of the copy paper copied on the first side and the binding margin direction of the copy paper copied on the second side are opposite to each other. control so that For example, when you want to make a copy as shown in Figure 9, you control the timing so that the binding margin (the shaded area in the figure) is created on the left side while copying the front side (first side), and the back side (the first side). When copying the second side), timing control is performed so that the binding margin is created on the right side opposite to the front side.

The figure shows left binding, and (a) is the manuscript front.

(b) is the original side, (c) is the front side of the copy, and (d) is the back side of the copy.

Also, contrary to FIG. 9, if the binding margin is created on the right side of the first side, the binding margin is created on the right side of the front side of the copy paper, and the binding margin is created on the left side of the back side. In any case, by reversing the direction of the binding margin between the front and back sides, it is possible to create a binding margin in double-sided copy mode, and a good copy (copied image) without image loss can be obtained.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a mechanical configuration diagram showing an embodiment of the present invention.

The embodiment shown in the figure is a double-sided copying device with a fixed document table, and the broken line indicates the conveyance path of the copy paper. In the figure, 1 is an exposure lamp 1a.

The mirror 1b, the V-mirror unit 1C, and the lens unit 1d are integrated into an optical system (exposure unit) that reciprocates through a wire (not shown). The copy paper fed from the feed roller (upper cassette) 2 is
After hitting the paper feed roller 3 once, a restart is performed in synchronization with the optical system 1 (registration).
. Reference numeral 4 denotes a resistor that detects the first sheet feeding position at this time. The photosensitive drum 5, which is rotating in the direction of the arrow, is cleaned by a cleaning unit 6 in which residual toner on the drum is scraped off by a blade, exposed to light before being charged by a lamp (PCI) 7, and corona discharged by a charger 8. The entire surface is charged with a positive charge.

The charge charged by the charger 8 is transferred to the charge eraser (
CEL) 9 erases the charges in unnecessary portions.

As the charge erasing section 9, for example, an erasing LED is used. Thereafter, the charged area of the photosensitive drum 5 is exposed to an optical image signal sent from the optical system 1, and a static latent image of the original image is formed on the drum surface. That is, the document is irradiated with light from an optical system 1 that is slidable in the direction of the arrow shown in the figure, and the reflected light containing the document information is transmitted to the photosensitive drum 5 via the optical system shown in the figure, and the drum Expose the surface. As a result, the electrostatic latent image formed on the drum surface can be adsorbed with toner by a roller in the subsequent developing device 10. 52@
is converted to The toner image on the drum surface is
L) After the pre-transfer exposure by 11, the transfer/separator 12
The image is fed by the paper feeding mechanism and transferred to the GC copy paper, and the copy paper that is in close contact with the photosensitive drum 5 is separated. The separated copy paper is fixed via the conveyor belt 13! The copy paper is then heated and pressed by the fixing roller 14 to fuse the toner on the copy paper to the copy paper, completing the copying operation on one side of the copy paper.

Here, in the case of single-sided copy mode, the fixing roller 14
The copy paper that has been fixed is sent to a paper discharge roller 16 by a switching guide 15 and is discharged. On the other hand, when the double-sided copy mode is selected, the copy paper on which the image has been copied on the first side is conveyed to a double-sided tray (referred to as a stacker) 17 by the switching guide 15. Here, the copy paper is placed upside down on the stacker 17.

After the second copy starts, the copy paper in the stacker 17 is fed by the feed roller 18 and conveyed to the second paper feed roller 3. The subsequent copying operation is the same as the first copying operation, so the explanation thereof will be omitted. 19
is a photo sensor (0) that detects that there is no copy paper.
20 is a photosensor that detects whether or not paper is being fed. Near the document table 21, there is an overrun photo sensor 22 for detecting the A-bar run of the optical system 1. Brake photo sensor 23 that detects the braking start position. A restart photosensor 24 for detecting a restart position and a home photosensor 25 for detecting a home position are arranged. The outputs of these various sensors and photosensors are sent to a control circuit (not shown) to control the timing of the entire device.

FIG. 2 is a diagram showing the operation of the optical system 1. It is shown in correspondence with various photosensors 22 to 25 for position detection. When a copy start command is issued, first, a preliminary scan for automatic density selection is performed once. After the return is completed, the exposure scan→return sequence is performed for the set number of sheets, the copying operation is completed, and the optical system 1 returns to the home position. Here, the functions of various photosensors are as follows.
It is as follows.

The overrun photo sensor 22 (left) has the role of preventing interference between the lens unit 1d and the V mirror unit 1C, and the brake photo sensor 23 is used to detect the point at which deceleration of the optical system 1 starts when returning. It will be done. The restart photosensor 24 is used to time the start of the second paper feeding, the overrun photosensor 22 (right) is used to detect the rightmost position of the optical system 1, and the home photosensor 25 is used to detect the rightmost position of the optical system 1. Used to detect the home position.

Next, registration timing during a copy operation will be explained. FIG. 13 is a timing diagram when binding margin is selected in double-sided copy mode. In the figure, (a) shows the main five-stage operation that operates the device, (b) shows the forward movement of the optical system, (c) shows the return movement of the optical system, and (d) shows the first paper feed. (e) is the second
Paper feeding operation (to) restarts Photo sensor (PS)
24 shows the detection operation, and (g) shows the detection operation of the registration sensor 4, respectively.

When you press the copy button, the first side (front side) is displayed as shown in (a).
The second side (
The copy is made to the back side). After starting copying, the optical system 1 performs a preliminary scan as shown in (b), and then returns to scan as shown in (c). On the other hand, on the paper feed side, as shown in (d), the feed roller (first paper feed roller) 2 is rotated at the timing when the preliminary scan returns, and the copy paper is conveyed to the second paper feed roller 3.

In this case, the binding margin can be created depending on the relationship between the operation of the optical system 1 and the on-timing of the second paper feed.

Therefore, the start point of the exposure scan shown in (b) (the moment when the optical system 1 switches from returning to forward) is set as a trigger point for synchronizing the optical system 1 and the paper feeding system. It is assumed that when the second paper feed roller 3 is turned on at tref seconds from this trigger point, a normal copy without any binding margin can be made. Here, [after to seconds have elapsed after 101 seconds, that is, after (trer+t o ) seconds from the trigger point,
When the second paper feed roller 3 is turned on, the image advances ahead of the copy paper, so the image is placed on the left edge of the first side of the copy paper.
A blank area (shaded area in the figure) of LoXL-8←I) as shown in Figure 4 (a) is created. Here, L S is the linear velocity (111111/Sec) of the optical system 1. This blank space becomes the binding margin.

Next, at the time of copying the second side, [0 seconds before trer seconds,
In other words, when the second paper feed roller 3 is turned on after (trer-t,) seconds after the bird leaves the fish, the copy paper precedes the image, contrary to the case of copying the first side.
At the right end of the second side of the copy paper, mark j o as shown in Figure 4.
A binding margin (shaded area in the figure) of only X LS (ml) is created.

5 to 7 are diagrams showing the operation of the apparatus of the present invention.

FIG. 5 is a flowchart showing the main routine, FIG. 6 is a flowchart showing copy start processing, and FIG. 7 is a flowchart showing the process control routine. First, the main routine shown in FIG. 5 will be explained. When powering on, first perform initialization processing (home search for optical system and lens drive system, release of blade pressure, initial +1 setting of copy mode, warm-up control, etc.). Next, during idling, idling processing such as manual operation key 9 display control, fixing+a temperature control, and copy condition determination is performed. Copy conditions (Is there copy paper, is the paper cassette installed correctly, is the door closed, etc.)
If the copy is possible, press the copy button to start copying. On the other hand, in normal copy processing, process control, copy condition processing, etc. are performed.

Next, the copy start process shown in FIG. 6 will be explained. When the copy button is pressed, the load (main motor, fan,
After initializing the paper feed counter, paper ejection counter, and timer, the copy operation begins. During the copy operation, the process control routine performs sequence control of the load, detects no paper feed, manually presses the stop key, compares the set number of sheets with the paper feed counter, etc. based on sensor input, counter, timer count-up, etc. Copy condition processing routine (fifth) that determines whether to interrupt or continue operation
(see figure) is executed.

In the process control sequence shown in FIG.
Check the contents of the counter CN T'R to determine which sequence of copying is being executed,
Performs input judgment, load drive, etc. determined for each sequence. In the copy start processing routine shown in FIG.
MERO and TEMERI are set, timer counting starts, and loads such as the main motor and fan are driven.

Next, in the state of 5EQCNTR-O in the process control routine, the exposure lamp is turned on when TIMERO counts up, and then forward scanning (preliminary scan) of optical system 1 starts when TIMER1 counts up. ,
Pre-charging exposure lamp (PCL)7. Transfer IyJ exposure lamp (PTI->11. Separation bias and LED loads are activated. At this time, set values are set in T[MER2 and started. When TIMER2 counts up, optical system 1 completes the preliminary scan and starts the return scan.At the same time, the exposure lamp is turned off, and the charger 8 and first paper feed roller 2 are turned on.Then, the contents of 5EQCNTR are advanced by one, and the next Input control of each sensor is performed.

When the registration sensor 4 is turned on and it is detected that the copy paper has hit the second paper feed roller 3, a count of TrMER3 is started in order to find the timing to turn off the first paper feed. This TIMER3 count/value is the second
This determines how much the copy paper should be looped during paper feeding. At this time, the optical system 1 restarts the photosensor 24 while performing a return scan. Brake photo sensor 2
Cross 3. When the restart photosensor 24 is turned on, the charge erasing section (erasing LED) 9 is turned off, and when the brake photosensor 23 is then turned on, the exposure lamp 1a is turned on prior to the next exposure scan, and the optical system 1 is turned on. Reduce the return speed and start deceleration control to apply the brakes.

Furthermore, the timer is used to turn on the second paper feed roller 3 at the timing when the decelerated optical system 1 reaches a speed of O and switches from return to forward (exposure scan) (points in FIG. 3).
4 is set and counting starts. This T[ME
The setting value of R4, that is, the optical system 1 starts the exposure scan,
As explained with reference to FIG. 3, the binding margin a is controlled by the time until the second sheet feeding starts. When the binding margin mode is off, TIMER4 contains tref- as a reference value to ensure that the leading edge of the image perfectly aligns with the edge of the copy paper.
45 is set. When in binding margin mode and not double-sided, TIMER4 has <45-To as the binding margin width.
) is set, and in the case of H double-sided binding margin mode, (45+To) is set for the first side, and (45-To) is set for the second side.

In this way, when TIMER4 is set, binding margins are formed such that the first one is the left binding margin and the second one is the right binding margin. Note that the value of the constant To that determines the width of the binding margin is a value set in advance by use. After starting TIMER4, advance 5EQNTR by one more step. Then, 5
In the state of EQCNTR=2, the first paper feed is turned off when TIMER3 counts up, and the paper feed counter, 5
EQCNTR is incremented. As mentioned above, T[
At the timing of J runt up (MER4), the direction and amount of deviation between the image (elephant) and the copy paper are determined, and a binding margin is created.

FIG. 8 is a configuration block diagram showing one embodiment of the control circuit according to the present invention. The circuit shown executes the sequence shown in FIGS. 5-7. In the figure, 31 is a CPU that performs various calculation controls, 32 is an I10 interface that receives various sensor outputs or key power, etc., and also provides output signals to motors, clutches, solenoids, LEDs, etc., and 33 is a ROM 1 that stores sequence programs, etc.
34 is a RAM that temporarily stores data and the like.

CPLI31. I10in')-Face 32. ROM
33 and RAM 34 are interconnected by an address bus ΔD and a data bus DB.

The CPU 31 sequentially executes programs according to codes read from the ROM 33 and accesses the RAM 34 and the I10 interface 32. The input port in the I10 port in the I10 interface 32 has various sensors,
Operation keys etc. are connected, and the output boat has a motor,
Loads such as a clutch, a solenoid, and an LED are connected via a drive circuit (not shown). The above-mentioned timer and counter may be built into the CPU 31 as a software timer or soft counter, or may be created in the I10 interface 32 as a hardware.

(Effect of lightening) As described in detail above, according to the present invention, the means for turning over the copy paper on which the first side copy has been completed and the moment when the optical system changes from returning to exposure scanning are set as the trigger points. By providing a means to vary the time until the start of the second paper feed based on this number of points, using a timer,
You can reverse the direction of the binding margin on the front side (first side) and back side (second side) at the same time. Therefore, it is possible to realize a copying apparatus that can create binding margins on both sides.

[Brief explanation of drawings]

Figure 1 is a mechanical configuration diagram showing one embodiment of the present invention, Figure 2 is a diagram showing the operation of the optical system, and Figure 3 is the operation of each part when binding margin is selected in double-sided copy mode. FIG. 4 and FIG. 9 are diagrams showing the state of creating a binding margin, FIGS. 5 to 7 are flowcharts showing the operation sequence of the present invention, and FIG. 8 is a diagram showing the control circuit according to the present invention. FIG. 2 is a configuration block diagram showing one embodiment. 1... Optical system (exposure unit) 2... Feeding roller 3... Second paper feed roller 4.
...Registration sensor 5...Photoconductor drum 6...Cleaning unit 7.11...Lamp 8...Charger 9...W!
Electric eraser 1o...Developer 12...Transfer/separator 13...Transport belt 14...Fixing roller 1
5... Switching roller 16... Paper ejection roller 17... Stacker (double-sided tray) 18... Double-sided feed roller 19... 0 sheet detection photo sensor 20... Paper feed photo sensor 21... - Original table 22... Overrun photo sensor 23... Brake photo sensor 24... Restart photo sensor 25... Home photo sensor 31... CPU 32... I10 interface 33 - ROM 34 = -F'(A M, A
D...Address bus DB...Data bus Patent applicant Roku Konishi Photo Industry Co., Ltd. Agent Patent attorney Fuji Ijima 1 person outside the jurisdiction Figure 2 Figure 4 (a) (b) tOxLS
,tOXLs7N
Kaisho 62-194263 (8) No. 6 glue mouth

Claims (1)

[Claims] In a copying apparatus having a double-sided copying means and a binding margin selection/creation means, when set to double-sided copying mode, the binding margin direction of the copy paper copied on the first side and the binding margin direction of the copy paper copied on the second side are determined. A copying apparatus comprising a control means for controlling the binding margin directions to be opposite to each other.