JPH0469386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a copying machine equipped with an automatic document feeder capable of performing a preliminary copying operation prior to the actual copying operation.

<Summary of the Invention> A copying machine equipped with an automatic document feeder of the present invention has the following features:
The apparatus includes an automatic document feeder that transports the original to a copying position, performs a copying operation on the original according to a set number of sheets, and when the copying is completed, ejects the original and transports the next original to the copying position. In the copying machine, a single preliminary copy is made separately from the above copying operation,
After a predetermined period of time has elapsed from the end of the preliminary copying operation, the device controls the ejection of the original document that has been preliminary copied and is present at the copying position, and detects the presence of the original document that is present at the copying position when the copying machine is powered on. In response to this, the remaining original is ejected.

<Prior art and its drawbacks> When the size of the image of the original to be copied is irregular during copying work, or the image density is uneven, the set copy magnification and original exposure amount may not match the intended copy image. It is necessary to check whether it is appropriate by comparing it with the above. On the other hand, an automatic document feeder conveys a document placed on a document tray to a copying position, and after the copying operation is completed, discharges the document to a document discharge tray or the like. The document must be conveyed to the copying position prior to the scanning of the optical system involved in the copying operation, so if multiple documents are placed on the document tray, the copying operation is currently being performed. The next document is engaged with the conveyance means and is ready for conveyance. Therefore, after placing multiple originals on the original tray in a copying machine equipped with the above-mentioned automatic document feeder, a single When a copying operation is executed, the first original is ejected to the original ejection tray after the copying operation is completed, and the second original is engaged with the original transport means. Therefore, when performing the original copying operation, the first
It is necessary to return the original and the second original onto the original tray, and this operation becomes extremely complicated, especially when copying a plurality of originals with consecutive pages.

For this reason, the conventional method disclosed in Japanese Utility Model Application Laid-Open No. 53-102633 is configured to allow selection and input of only a single preliminary copying mode, regardless of the set number of copies, prior to the actual copying operation. It had been devised. However, the conventional copying machine described above does not take into consideration how to handle the original after the preliminary copying operation is completed. Therefore, if the document remains in the copying position after the preliminary copying operation is completed, it will adversely affect subsequent copying operations. In particular, in an automatic document feeder that uses a document drum, the document may curve due to being wrapped around the document drum for a long time, and if the power is turned off with the document remaining at the copying position after the preliminary copying operation when the document is ejected, the next When a document is conveyed to a copying position during a copying operation, there are drawbacks such as paper jams, document loss, device failure, and decreased work efficiency. A similar accident may also occur when a copying operation is interrupted.

<Object of the Invention> In view of the above-mentioned conventional drawbacks, an object of the present invention is to provide a system in which the power is turned off (off) with the document remaining in the copying position, and then the power is turned on (on) to perform the copying operation. When the copying operation starts, an automatic document feeder is provided that can prevent accidents such as jamming of a new document to be conveyed with the remaining document and ensure that the document for the copying operation is set at the copying position. To provide a copying machine equipped with

<Structure and Effects of the Invention> A copying machine equipped with an automatic document feeder of the present invention has the following features: by operating a switch that starts a copying operation,
Transporting the original placed on the original tray to a copying position, performing a copying operation according to the set number of copies or multiple copies, and ejecting the original after completing the copying operation for one original, A copying machine that carries successive originals to a copying position and makes continuous copies, and a preliminary copying control that carries out preliminary copying in which the original is conveyed to the copying position and a single copy of the original is made by operating a preliminary operation switch. means for ejecting the original existing at the copying position after a predetermined time has elapsed after the completion of the single preliminary copying operation; means for causing the copying control means to perform a single preliminary copy again; a detection means for detecting the presence or absence of a document present at the copying position; and detection of the document by the detection means when the copying machine is powered on. and means for outputting a signal for activating the document ejecting means in response to the document discharging means.

According to the present invention having the above configuration, even if the document existing at the copying position is ejected after a predetermined time has elapsed after preliminary copying is finished, and the power is turned off within the predetermined time, the power is turned on again. Sometimes, when it is detected that there is a document at the copy position,
Since the remaining original is ejected, there is no possibility that the original remains at the copying position before the copying operation is started. Particularly, it is possible to prevent the original from remaining in the preliminary copying operation, and when the original remains, it is possible to prevent problems such as jams in conveyance of the next original due to the remaining original and inconvenience caused by the copying operation.

Embodiments (1) Structure Description FIG. 2 is a front sectional view showing the schematic structure of a copying machine equipped with an automatic document feeder according to an embodiment of the present invention. On the top of the copying machine body 1 is a document tray 2.
and an automatic document feeder 15 equipped with a document ejection tray 3. A document drum 7 is disposed inside the automatic document feeder 15, and a document feed roller 4, a document feed roller 5, and a document timing roller 6 are disposed between the document drum 7 and the document tray 2, respectively. It is set up. Further, on the outer circumference of the document drum 7, document ejection rollers 8 and 9 are rotatably provided. An exposure lamp 11 is installed below the document drum 7, and reflectors 12, 14 are provided below the automatic document feeder 15.
and lens 13 constitute an optical system.

Inside the copying machine main body 1, approximately in the center below the optical system, there is a photosensitive drum 33, and on its outer periphery, a charging charger 16, a developing device 20, a transfer charger 21, a peeling charger 22, and a cleaner 2.
3, a static elimination charger 24 and a static elimination lamp 25 are provided, and constitute a copying process section. A paper cassette 26 is located on the right side of the copying machine main body 1.
and 27 are attached, and paper feed rollers 18 and 19 are also provided to constitute a paper feed section. Further, a paper ejection tray 32 is attached to the left side of the copying machine main body 1, and a paper ejection roller 31 is also provided, constituting a paper ejection section. A PS is installed between the transfer position between the photosensitive drum 33 and the transfer charger 21 of the copying process section and the paper feed section.
A roller 28 is provided, and a conveyor belt 29 and a fixing device 30 are provided between the transfer position and the paper discharge section. With the above structure, a paper conveyance path is configured from the paper feed section to the paper discharge section, passing through the transfer position of the copying process section.

FIG. 3 is a plan view of the operation section of a copying machine equipped with the automatic document feeder.

A print switch 34 is arranged at the right end of the operation section 41 of the copying machine, and a proof key 35 is arranged at the left side thereof. A numeric keypad 38 is disposed approximately in the center of the operating section 41, and the set number of sheets input by operating the numeric keypad 38 is displayed on the numerical display device 40. When the print switch 34 is operated, the operation for the set number of copies inputted by the numeric keypad 38 and displayed on the numerical display device 40 is performed continuously, and when the proof key 35 is operated, the set number of copies is continuously performed. Only a single copying operation is performed regardless of the number of sheets. This copying operation is a preliminary copying operation, and the original remains wound around the original drum, which is the copying position. The eject key 36 is an original ejecting operation key that instructs ejecting the original, and outputs a signal to start the original ejecting means that includes a part that rotates the original drum 7 and guides the original to the ejection tray. By doing so, the original wound on the original drum is ejected to the original ejection tray 3, and the clear key 37 is used to stop the copying operation or change the set number of copies input using the numeric keypad 38. This is to erase the . The pause key 39 is a key operated when temporarily suspending the copying operation.

(2) Operational Description FIGS. 1A to 1C are flowcharts showing the operation of a copying machine equipped with the automatic document feeder described above.

At step n1 (step ni is simply referred to as ni), a document is set on the document tray 2 of the automatic document feeder 15. Then, in n2, the copy magnification,
Various conditions such as the exposure amount of the original and the number of copies are input using the numeric keypad 38 of the operation section 41 and the like. Next, in n3, it is determined whether or not the print switch 34 has been operated, and if the print switch 34 has not been operated, the process advances to n4. Proof key 3 on n4
5 is turned on. If the proof key 35 is operated at n4, the process advances to n5, and the original is fed from the original tray 2 to the original drum 7 by the rotation of the original feeding roller 4, original feeding roller 5, and original timing roller 6. The document fed by the document feed roller 4 comes into contact with the document feed roller 5, which has stopped rotating, and skewed feeding is corrected. Next, the document feed roller 5 transports the document to a position where it abuts the document timing roller 6, which has stopped rotating. The document timing roller 6 starts operating in synchronization with the rotation of the document drum 7, and causes the leading end of the document to engage with a groove (not shown) formed on the outer peripheral surface of the document drum 7. Further, the document is held by claw members (not shown) of the document drum 7, and the document is wound on the surface of the document drum 7. After this, n6
to perform a single copy operation.

During the above-mentioned copying operation, the original drum 7 rotates in synchronization with the photoreceptor drum 33, and the light reflected from the original by the light beam of the exposure lamp 11 hits the surface of the photoreceptor drum 33 via the reflection plates 12, 14 and the lens 13. Light is distributed. The surface of the photosensitive drum 33 is charged with a single charge by the charging charger 16 prior to the distribution of the light beam. The charge on the exposed area is removed by the distribution of the reflected light from the original, and
An electrostatic latent image is formed in the areas not exposed to light. A developer is supplied from the developing device 20 to this electrostatic latent image, and the image is visualized. Prior to the rotation of the photosensitive drum 33, the copy paper is conveyed to the position of the PS roller 28 by rotation of the paper feed roller 18 or 19. This PS roller 28 is the photosensitive drum 33
The photoreceptor drum 3 starts rotating in synchronization with the rotation of the photoreceptor drum 3.
The copy paper is fed so that the leading edge of the image on the front surface of No. 3 and the leading edge of the copy paper come into contact at the transfer position. Due to the discharge of the transfer charger 21 at this transfer position,
The developer image formed on the surface of the photosensitive drum 33 is transferred to the surface of the copy paper. The paper that has undergone the transfer process is led to a fixing device 30 by the rotation of the conveyor belt 29, and after the transferred developer image is fixed thereon, the paper is discharged to a paper discharge tray 30 by a paper discharge roller 31. Photosensitive drum 3 that has completed the transfer process
The remaining waste toner is collected from the surface of the toner 3 by the cleaner 23, and after it is electrically neutralized by the static eliminating charger 24 and the static eliminating lamp 25, it is subjected to repeated copying operations.

After the single copying operation, ie, preliminary copying, is completed, timer T is started at n7. This timer T measures a preset fixed time. Next, at n8, it is determined whether or not there is a key input by the operator. If no key input is made, the process proceeds to n9, where it is determined whether or not the timer T has timed up. If the timer T has not timed up at n9, the process returns to n8. n9
If timer T times up in
At n10, regardless of the copying operation, the document discharge means is activated to rotate the document drum 7, and the document wound around the document drum 7 is discharged onto the document discharge tray 3 by the operation of document discharge rollers 8 and 9.

When a key input occurs at n8, the timer T is reset at n11, and operations corresponding to the operated keys are performed at n12 to n14. That is, when the eject key 36 is operated, by skipping from n12 to n10, the above-described document ejecting means is activated, thereby immediately ejecting the document wound around the document drum 7. When the proof key 35 is operated, the process skips from n13 to n6 and performs a preliminary copying operation. If the print switch 34 is operated, the process advances from n14 to n15. If the print switch 34 is not operated at n14, that is, if another key operation such as changing the copying condition setting is performed at n8, the program skips to n2.

If the print switch 34 is operated at n3 or n14, the process advances to n15, and at n5, the copying operation for the originals fed from the original tray 2 and wrapped around the original drum 7 is performed for the number of copies inputted at n2. It will be done. Next, in n16, the original is discharged onto the original discharge tray 3, and in n17, it is determined whether or not there is a next original on the original tray 2. If there is a next document in n17, the process advances to n18, where the document is guided to the document drum 7 according to the document feeding operation described above, the copying operation is performed again at n15, and the document is ejected at n16. If there is no document at n17, the operation ends. Through the operations n15 to n18 described above, the operations for the set number of copies can be performed continuously for all the originals placed on the original tray.

If the clear key 37 is operated after the preliminary copying operation is completed at n6 until the timer T times up, or during the copying operation at n15, the document is wrapped around the document drum 7 when the power is turned off. left as is. After that, the power to the copying machine is turned on, and the power is turned on as described above in order to prevent the above-mentioned wrapped original from causing an accident such as jamming when the copying operation is performed by operating the print switch. When the power is turned on (power on) at n21 from the state where the power is turned off (off), the control described below is performed. In this control, at n22, it is detected whether or not a document resides on the document drum 7, that is, the presence or absence of a document on the document drum is detected by a conventionally well-known document detecting means. If it is determined that the document is wound around the document drum 7, the document is ejected at n23.
At n23, as in n10 described above, the document ejection means is activated, the document drum 7 is rotated, and the document is ejected. As mentioned above, when the power is turned on, this document ejecting means
When the presence of a document is detected, the signal is output and activated.

(3) Effects of the Embodiment According to the present invention with the above-described configuration and operation, the timer means is operated after the preliminary copying operation is completed by the operations n7 to n10, and when a certain period of time has elapsed without inputting the next operation, the timer means is activated. It is possible to eject the original and prevent the original from remaining at the copying position for a long time. In addition, if it becomes necessary to stop the copying operation or correct the order in which the originals are placed after the preliminary copying operation is completed, the originals can be immediately ejected by operating the eject key 36. Furthermore, if the power is turned off with the document remaining in the operations n21 to n23, it is possible to prevent a jam from occurring at the start of the next copying operation.

(4) Other aspects When the next original is placed on the original tray 2 at n17, it is also possible to skip to n5 and select execution of a preliminary copying operation for each original. Further, it is also possible to proceed to n23 immediately after the power is turned on in n21, and perform the document ejection operation regardless of whether there is a remaining document.

[Brief explanation of the drawing]

1A to 1C are flowcharts showing the operation of a copying machine equipped with an automatic document feeder according to an embodiment of the present invention, and FIG. 2 is a front view showing a schematic structure of a copying machine equipped with the same automatic document feeder. The sectional view and FIG. 3 are front views of the operation section of the copying machine equipped with the same automatic document feeder. 7... Original drum, 15... Automatic document feeder.

Claims (1)

[Claims] 1. By operating a switch that starts a copying operation, the original placed on the original tray is transported to the copying position, and the copying operation is executed according to the set number of copies or multiple copies. A copying machine that performs continuous copying by ejecting the original after the copying operation of one sheet of original is completed and transporting the subsequent original to the copying position, and the original is transported to the copying position by operating a preliminary operation switch. , a preliminary copying control means for performing preliminary copying to execute a single copy of the original document; and a document discharging means for discharging the document existing at the copying position after a predetermined period of time has elapsed after the completion of the single preliminary copying operation; means for causing the preliminary copying control means to perform a single preliminary copy again in response to the operation of the preliminary operation switch before a predetermined period of time has elapsed; a detection means for detecting the presence or absence of a document existing at the copying position; An automatic document feeder comprising: means for outputting a signal for activating the document ejection means in response to the detection of the document by the detection means when the machine is powered on; Copy machine.