JPS6262375A - Copying device - Google Patents

Abstract

PURPOSE:To improve a divided copying speed by exposing plural copying areas on an original by one continuous scanning and at the same time, feeding plural sheets of transfer paper continuously for one continuous scanning. CONSTITUTION:An operating section OB makes setting and releasing of a divided copying mode. In the case of a divided copying mode, the size of an original is detected by a size detecting switch 106 and compared with the size of transfer paper detected by a cassette size detecting section 78 and propriety of divided copying is judged. When divided copying is possible, corresponding number of sheets of transfer paper are fed continuously, and exposure and transfer are made for plural sheets of transfer paper by one continuous scanning. These are controlled by a main controller 100 consisting of a CPU, a ROM, a RAM an I/O etc. Thus, divided copying is made by one continuous scanning and continuous paper feeding, and copying speed can be improved.

Description

[Detailed description of the invention] Night-time division The present invention relates to a copying apparatus.

2. Description of the Related Art In general, a copying device copies a document placed on a document placement surface onto a single sheet of transfer paper.

Therefore, when it is desired to copy a double-sided document such as a book onto a separate sheet of transfer paper, the document must be set in a predetermined position each time, making copying time-consuming and difficult to operate.

Therefore, some devices have a divisional copying function that divides the document placement surface into a plurality of regions and transfers the document in each region onto transfer paper with a single copy command.

A copying apparatus equipped with such a divisional copying function scans each document once, for example, by giving one copy command to two documents placed on the document placement surface, that is, a total of two scans. The scanner performs multiple scans and exposes the original to make a copy of each document.

However, if one exposure scan is performed for each document in this way, the scanner must be stopped and started for each document, so it takes time to stop and start the scanner, and the copying speed increases. There is a disadvantage that it is not possible to improve the

Purpose This invention has been made in view of the above points, and an object thereof is to improve the copying speed in divided copying mode.

In order to achieve the above-mentioned object, this invention exposes each area of the document screen to light in one continuous scan, and continuously feeds a plurality of sheets of transfer paper for each continuous scan. This is what I did.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

FIG. 1 is a plan view showing an example of an operation section of a copying apparatus embodying the present invention.

The operation unit OB of this copying machine is used as an operation key.

Print key 1 instructs to start printing.

A zoom magnification key 2 for setting the copy magnification, an enlargement key 3 for instructing an enlarged copy, a reduction key 4 for instructing a reduced copy, a same-size key 5 for instructing a same-size copy, and a mvx key for changing the shading of the copied image. the density am key 6 for instructing interrupt copying, the numeric keypad 8 for setting the number of copies, the clear/stop key 9 for instructing to change the number of copies or stop continuous copying, and the set during copying. It is provided with a number confirmation key 10 for instructing confirmation of the number of sheets, a preheating key 11 for instructing preheating, and a continuous paper feeding mode key 12 for instructing a continuous paper feeding mode (C divided copy mode) for continuously feeding transfer paper.

This operation unit OB also serves as an indicator for the number of sheets set,
A copy number counter 13 that displays the number of sheets being copied and the status at the time of an error (error status), an interrupt display 14 that displays 1 interrupt copy, a manual feed display 15 that displays manual feed table open, and paper A misfeed indicator 16 that displays misfeed, a toner replenishment indicator 17 that displays toner end, a paper replenishment indicator 18 that displays no paper in the cassette, and a paper size display that displays the size of paper in the cassette. a magnification display 20 that displays the image size and the magnification of the reduction/enlargement mode, a zoom magnification display 27 that displays the copy magnification, a density adjustment display 22 that displays the degree of shading of the copied image, and a preheating It also includes a preheating indicator 23 that displays the status.

FIG. 2 is a schematic diagram showing an example of the mechanism of a copying apparatus embodying the present invention.

In this copying apparatus, when the print key 1 is pressed, the main motor 31 rotates and the photosensitive drum 30 rotates in the direction of arrow P. After the drum surface is uniformly charged by the charger 32, the eraser 33, charges in portions unnecessary for copying are erased according to the transfer paper size.

On the other hand, a halogen lamp 35 and a first mirror 36 which are exposure lamps are attached to the first carriage 34, and a second mirror 36 is attached to the second carriage 37. The moving optical system including the third mirrors 38 and 39 is driven by the main motor 31 via a timing belt and a forward/reverse clutch (not shown).

This moving optical system turns on the halogen lamp 35 at a predetermined timing and moves forward while irradiating the document placed on the contact glass 41 and pressed by the pressure plate 42, and then the forward/reverse clutch is activated. to return to action.

At this time, the light reflected by the document irradiated by the halogen lamp 35 is reflected by the first mirror 36. The charged photoreceptor drum 30 is passed through the second mirror 38, the third mirror 3, the fixed through lens 43, the fourth mirror 44, and the dustproof glass 45.
is incident on the top.

Exposure is performed in this manner, and an electrostatic latent image corresponding to the image of the original is formed on the photoreceptor drum 30.

This electrostatic latent image on the photosensitive drum 30 is transferred to the developing roller 47.
, the toner cartridge 48 to the toner hopper 5
0 and the toner tank 52 via the toner supply roller 51.
The toner that is sent to the toner and stirred by the stirring roller 53 is deposited and visualized.

On the other hand, the transfer paper stored in the cassette 55 is transferred to the calling roller 56 and the paper feeding roller 57. The paper is fed by a reversing roller 58 to a position where it is held between registration rollers 59, 59.

Then, the registration rollers 59, 59 rotate with accurate timing, and this transfer paper comes into contact with the photosensitive drum 30.
The toner image on the photosensitive drum 30 is transferred.

At this time, a high DC voltage is applied to the transfer charger 60 at precise timing to attract the toner image on the photosensitive drum 30 toward the transfer paper.

Thereafter, an AC high voltage is applied to the separation charger 61 to remove static electricity from the transfer paper, and the transfer paper is separated from the photoreceptor drum 30 by the separation claw 64.

In this way, the photosensitive drum 3 after the transfer 9 separation is completed.
0 has residual toner removed by a cleaner fur brush 65 and a cleaning blade 66, and residual charges are erased by light irradiation from a static elimination lamp 67 using electroluminescence, thereby preparing it for the first copying process.

On the other hand, the transfer paper separated from the photoreceptor drum 30 is transported into a fixing device 70 by a transport roller 69, and the toner image is fixed on the heat roll by a fixing roller 72 having a built-in fixing heater 71 and a pressure roller 73. Thereafter, it is separated from the fixing roller 72 by the fixing device 74, and is discharged to the copy receiver 76 by the paper discharge rollers 75, 75.

Next, details of the paper feeding section will be explained with reference to FIGS. 3 and 4.

First, when the main switch of the copying machine is turned on and the cassette 55 is set, the cassette size detection section 78 detects that the cassette 55 is loaded.

A paper feed tray motor (not shown) moves ONL to raise the tray lifting arm 77 and lift the transfer paper to a certain height.

Here, when print key 1 is pressed and a paper feed signal is input,
The paper feed solenoid 7S turns on and the operating lever 80 moves to the arrow A.
Since it is pulled in the direction and detached from the clutch sleeve 81, the paper feed roller 57 and the feed roller 56 begin to rotate.

Further, at the same time as the actuating lever 80 is pulled, the actuating lever 80
Since the stopper 82 that overlaps the paper feed roller 57. It starts rotating together with the calling roller 56.

As this cam 83 rotates, a lever 86 mounted on the cam 83 is lowered, the calling roller 56 is lowered onto the transfer paper, and the transfer paper is fed to the paper feed roller 57.

Note that when the cam 83 further rotates, the lever 86 rises, and the calling roller 56 leaves the transfer paper.

The transfer paper retrieved from the cassette 55 in this manner is further fed by the paper feed roller 57.

Note that, at this time, double feeding is prevented by the reverse rotation roller S8.

When the transfer paper passes under the registration front detection switch 88, which is a reflective photosensor, located in front of the registration roller 5S, the registration solenoid (not shown) is activated to 0F.
FL, the registration roller 59 that has been rotating until now stops.

However, since the paper feed solenoid 7 is ON, the paper feed roller 57 continues to rotate, so the transfer paper hits the registration roller 5S, becomes bent, and the skew is corrected, and then the paper feed solenoid 7 continues to rotate. turns off.

Next, exposure is started, and when the first carriage 34 turns on the registration switch 8 shown in FIG. 2, the registration solenoid turns on, the registration roller 59 rotates, and the transfer paper is sent to the transfer section.

Next, a cassette size detection section for detecting the cassette size will be described with reference to FIG.

The cassette size detection section 7 is composed of four reed switches SWI to SWI4 attached to the paper feed section, and is determined by the presence or absence of magnets 90 attached to predetermined positions 11M1 to M4 of the cassette 55 depending on the size of the cassette 55. Detect the cassette size.

(l: with magnet, 2: without) In other words, according to the size of the transfer paper set in the cassette 55, positions M1 to M4 corresponding to the four reed switches SWI to SWI4 of the paper feed section are selected according to the above combination table. By attaching a magnet SO to the cassette 55, when the cassette 55 is set, the four reed switches SWI~4 will be turned ON or 0F depending on the presence or absence of the magnet SO at the corresponding position.
FL, each size of the cassette 55 is detected by the combination thereof.

FIG. 6 is a block diagram showing the control section of this copying apparatus.

The main controller 100 includes a CPU and a ROM.

It is composed of a microcomputer system consisting of RAM, Ilo, etc., and is a circuit that also serves as a divisional copy control that controls the entire copying apparatus.

This main controller 100 receives signals from each of the above-mentioned keys of the operation section OB.

A display signal corresponding to the input signal is outputted to display the required display on various indicators of the operation unit OB.

The main controller 100 also includes an upper limit detection switch 101 for the cassette 5S, which is a pre-registration detection switch 88.

Paper end detection switch 1022 consisting of a reflective photosensor, manual feed detection switch 103, registration switch 8, and switches SWI of the cassette size detection section 78
Input the detection signals from ~4.

Furthermore, this main controller 100 inputs a detection signal from a manual feed size detection switch 106 through a receive terminal RXD via an optical control circuit 105 that controls the optical system.

Then, the main controller 100 controls each load and controls the copying process according to a program stored in the internal ROM based on these key inputs and detection signals.

In other words, this main controller 100 has a high voltage power source 1
07 to control the charger 32 at a predetermined timing.
, a high voltage is applied to the transfer charger 601 and the separation charger 61.

The main controller 100 also supplies a scan home pulse SHP to the optical control circuit 105.

The timing pulse TP and this transmission data are outputted from the transfer terminal TXD to control the lighting of the halogen lamp 35 and control the document scanning by the moving optical system.

Further, the main controller 100 controls the developing bias power supply 108 to apply a predetermined developing bias voltage to the developing roller 47.

Furthermore, this main controller 100.

The paper feed tray motor 110, paper feed solenoid 7, and registration solenoid 111 are driven and controlled to control the feeding of the transfer paper.

Next, the operation of this embodiment configured as described above will be explained with reference to FIG. 7 and subsequent figures.

In this copying apparatus, a continuous paper feeding mode key 12 is used to specify the setting or cancellation of continuous copying mode (divided copying mode).

Therefore, in the mode setting process shown in FIG. 7, the main controller 100 determines whether or not the continuous paper feeding mode key 12 is pressed, and when the continuous paper feeding mode key 12 is pressed, the main controller 100 is already in the continuous paper feeding mode It is determined whether the continuous paper feeding mode is ON or not, and if the continuous paper feeding mode is ON, the continuous paper feeding mode is turned OFF and the process ends.

On the other hand, if the continuous paper feeding mode is not ON when the continuous paper feeding mode key 12 is pressed, the size of the set transfer paper is checked and the continuous paper feeding mode is turned on.
Determine whether copying using split copy mode) is possible.

In other words, the size of the set transfer paper is determined by checking the detection signal of the cassette size detection unit 78, and the length of the transfer paper in the feeding direction is 1/2 of the length of the document placement surface in the feeding direction. If it exceeds.

That is, for example, when the document placement surface is A3, the set transfer paper is A3, B4, or A4 vertically.

When it is B5 vertical. , since it is not possible to copy in continuous paper feeding mode, the continuous paper feeding mode is turned off and the process ends.

On the other hand, if the length of the set transfer paper in the feeding direction is less than 1/2 of the length of the document placement surface in the feeding direction, it is possible to copy in continuous paper feeding mode. Then, turn on the continuous paper feeding mode and end the process.

Thus, when setting continuous paper feeding mode.

By determining whether or not continuous paper feeding is possible according to the size of the transfer paper, copying errors and time losses due to malfunctions are eliminated.

Next, the document placement surface is scanned by the moving optical system.
The control process will be explained with reference to FIG.

First, after starting scanning, it is determined whether the continuous paper feeding mode is ON or not. If the mode is not ON, scanning is performed to a position corresponding to the size of the transfer paper.

On the other hand, when continuous paper feeding mode is ON, if the transfer paper is A4 horizontal, it will be scanned for the length of A3 size,
If it is B5 horizontal, scan the length of B4 size, then scan A5
If so, scan the length of A4 vertical size, if B6 scan the length of B5 vertical size, if A6 scan the length of A5 vertical size, if these do not apply, scan the length of A3 size Scan length.

That is, when the continuous paper feeding mode is ON, a scanning distance that is twice the length of each transfer paper in the feeding direction is scanned.

Next, paper feed control will be explained with reference to FIG. S and FIG. 10.

When the main controller 100 performs paper feeding control,
When continuous paper feeding mode is OFF, one sheet is fed (single sheet feeding) at the timing shown in Figure S, and when continuous paper feeding mode is ON, two sheets are fed at the timing shown in Figure 10 (continuous feeding). .

In other words, when the continuous paper feeding mode is OFF, as shown in FIG.
After a second, the main motor 31 is driven and the registration solenoid 111 is turned on to rotate the registration roller 59.

Then, 0.85 seconds after the print key 7 is turned ON, the paper feed solenoid 79 is turned on for 76 seconds, and the call roller 56 and paper feed roller 57 are rotated to feed the transfer paper, until the leading edge of the transfer paper reaches the pre-registration detection switch 88. When the registration solenoid 111 is reached, the registration solenoid 111 is turned off to stop the rotation of the registration roller 5S.

Next, the first carriage 34 turns on the resist switch 8th.
After turning N, the registration solenoid 111 is turned ON with a predetermined time lag, and the registration roller 5 is rotated again to send the transfer paper to the transfer section.

During continuous copying, 0.4
After one second, the paper feed solenoid is turned on to start feeding the next paper.

On the other hand, when the continuous paper feeding mode is ON, as shown in FIG. 9, the first sheet is fed in the same manner as when the continuous paper feeding mode is OFF, but the registration solenoid 111 is also turned ON. At the same time, the paper feed solenoid 79 is also turned on to rotate the paper feed roller 57 and the calling roller 56.

At this time, until the first sheet of transfer paper passes through the paper feed roller 57, the second sheet of transfer paper is in a standby state due to the double feeding prevention function by the reversing rollers 58, and the first sheet of transfer paper is fed. The second sheet of transfer paper begins to be fed as soon as it passes through the rollers 57, and reaches the registration roller 5S (1
．． 5 seconds later).

The paper feed solenoid 7 is turned off to stop the paper feed roller 57 and the call roller 56.

At this time, since the registration roller 5S continues to rotate, the first transfer paper and the second transfer paper are continuously fed to the transfer section.

In this way, in this copying apparatus, the original document placement surface is divided into a plurality of areas, and the original in each area is exposed to different transfer sheets in one continuous scan with one copy command, and the original in each area is exposed in one continuous scan. Since a plurality of sheets of transfer paper are continuously fed, the copying speed in the one-division copying mode can be improved.

In the above embodiment, an example was described in which the 1M document placement surface was applied to a copying machine of A3 size, but the present invention can be similarly implemented to copying machines of other sizes.

Further, although the number of sheets to be fed during continuous paper feeding has been described using two sheets as an example, it can be carried out in the same manner for three or more sheets.

Effects As explained above, according to the present invention, the copying speed in the divided copying mode can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of an operating section of a copying machine embodying the present invention. FIG. 2 is a schematic diagram of the entire device, FIG. 3 is a schematic diagram of the paper feed section, FIG. 4 is a perspective view of the calling mechanism, and FIG. 5 is a diagram of the cassette size. FIG. 3 is a schematic diagram of a size detection section that performs detection. FIG. 6 is a block diagram showing the control section. FIG. 7 is a flowchart showing continuous paper feeding mode setting processing. Figure 8 is a flow diagram showing the scan control process, Figure 9 and Figure 1.
FIG. 0 is a paper feeding timing chart showing the timing of the control executed by the control section of FIG. 6 when sending one copy of transfer paper and when feeding two sheets in succession. 12...Continuous paper feeding mode key 30...Photoconductor drum 35...Halogen lamp 41...Contact glass 56...Calling roller 57...Paper feeding roller 58...Reverse roller 5S...・Registration roller 78...Cassette size detection section 7 days...Paper feed solenoid 88...Registration front detection switch 111...Registration solenoid Fig. 4 q F Fig. 5

Claims (1)

[Claims] 1. In a copying device that has a divisional copying function that divides the document placement surface into a plurality of regions and transfers the document in each region to a different transfer paper with a single copy command, the document in each region is transferred in one continuous scan. A copying apparatus characterized by being provided with divisional copying control means for exposing and continuously feeding a plurality of sheets of transfer paper for one continuous scan.