JPS61238043A - Copying machine equipped with automatic original feeder - Google Patents

Abstract

PURPOSE:To set a next original easily and securely and to prevent a jam, etc., from occurring by discharging an original speedily when a detecting means detects the original at a copying position which is already copied in power-on operation. CONSTITUTION:When the proof key 35 of an operation part 41 is operated, single prefliminary copying operation is performed regardless of the set number of copies and a timer starts at the end of the operation. If, however, the clear key 37 of the operation part 41 is operated before the timer enter a time-up state, the power source is turned off and the original is left loaded on a drum 7 as it is. For the purpose,the specific detecting means detects whether there is an original on the drum when the power source is turned on next and when so, the original is discharged speedily. consequently, the setting of a next original is facilitated and secured and a jam, etc., are prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine equipped with an automatic document feeder that is 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 according to the present invention includes a document ejecting device that operates regardless of a preliminary copying operation, and a document detecting device that detects the presence of a document at a copying position, The operation of the document discharging means is enabled when there is a document at the copying position when the power is turned on.

<Prior art and its drawbacks> When the size of the image of the original to be copied during copying work is irregular or the image density is uneven,
It is necessary to check whether the set copy magnification and original exposure amount are appropriate by comparing with the intended copy image. 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 scanning by 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 copying operation is performed for the purpose of checking whether the data related to the set copying operation is appropriate. When this 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, it is necessary to return the first and second originals to the original tray, which is extremely complicated, especially when performing the copying operation on multiple originals with consecutive pages. become.

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 is bent due to being stuck to 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 disadvantages of paper jams, document loss, device failure, and reduced work efficiency. A similar accident may also occur when a copying operation is interrupted.

<Objective of the Invention> In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to prevent the original from jamming, etc., due to the remaining original at the copying position when the power is turned off with the original remaining at the copying position during the next copying operation. It is an object of the present invention to provide a copying machine equipped with an automatic document feeder that can prevent the occurrence of accidents and ensure that a document related to the next copying operation is set at a copying position.

<Structure and Effects of the Invention> A copying machine equipped with an automatic document feeder according to the present invention includes a document discharging means for discharging the document remaining at the copying position to the outside, and a document discharging means for discharging the document remaining at the copying position to the outside, and a document discharging means for detecting that the document is at the copying position. The present invention is characterized in that it includes a detection means and a means for enabling the operation of the document ejection means when the document detection means detects a document when the power is turned on.

With the above configuration, according to the present invention, if the power is turned off while the original remains at the copying position, the original is immediately ejected when the power is turned on by the next operator at the start of the next copying operation. be able to. Therefore, it is possible to easily and reliably set the original document in the copying position for the next copying operation. Furthermore, it is possible to prevent jamming of the original near the copying position, thereby preventing loss of the original and damage to the apparatus.

Embodiment 11 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. An automatic document feeder 15 is configured with a tray 2 and a document ejection tray 3 attached.A document drum 7 is disposed inside the automatic document feeder 15. A document feed roller 4, a document stacking roller 5, and a document timing roller 6 are arranged between the document drum 7 and the document drum 7. Document discharge rollers 8 and 9 are rotatably provided on the outer periphery of the document drum 7. An exposure lamp 11 is attached below the document drum 7, and forms an optical system together with a reflector 12, 14 and a lens 13 disposed below the automatic document feeder 15.

Inside the copying machine main body 1, approximately at 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, a cleaner 23, and a static elimination charger 24. and a static elimination lamp 25 are disposed, constituting a copying process section. Paper cassettes 26 and 27 are installed on the right side of the copying machine main body 1, and a paper feed roller 1
8 and 19 are arranged to constitute a paper feeding 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 roller 28 is disposed between the transfer position between the photosensitive drum 33 and the transfer charger 21 of the copying process section and the paper feed section, and a transport roller 28 is provided between the transfer position and the paper discharge section. A belt 29 and a fixing device 30 are provided. 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 disposed at the right end of the operation section 41 of the copying machine, and a bluefon key 35 is disposed to the left of the print switch 34. 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 set copy number inputted using the numeric keypad 38 and displayed on the numeric display device 40 is continuously performed, and when the bluef key 35 is operated, the set copy number is changed. Only a single copy operation is performed regardless of the This copying operation is a preliminary copying operation, and the original remains attached to the original drum, which is the copying position. The eject key 36 is used to eject the original wound on the original drum to the original output 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) Description of Operation FIGS. 1A to 1C are flowcharts showing the operation of a copying machine equipped with the automatic document feeder described above.

In step nl (step ni is simply referred to as ni), a document is set on the document tray 2 of the automatic document feeder 15. Next, in n2, copy magnification, original exposure amount,
Conditions such as the number of copies are input using the numeric keypad 38 of the operation unit 41, and then the print switch 3 is pressed at 0 and n3.
4 is operated, and the print switch 34 is
If is not operated, proceed to n4. At n4, it is determined whether or not the Bluff key 35 is turned on. If the Bruf key 35 is operated in 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
The document is conveyed to a position where it comes into contact with 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 around the surface of the document drum 7. After this, the process proceeds to n6 and a single copying operation is performed.

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 plate 12.14 and the lens 13. Light is distributed. A charger 16 is placed on the surface of the photoreceptor drum 33 prior to the distribution of the light beam.
is charged with a single charge by 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 transferred to the PS roller 28 by rotation of the paper feed roller 18 or 19.
is being transported to the location. The PS roller 28 starts rotating in synchronization with the rotation of the photosensitive drum 33, and the copy paper is fed so that the leading edge of the image on the surface of the photosensitive drum 33 and the leading edge of the copy paper come into contact at the transfer position. 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 by the discharge of the transfer charger 21. 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. After the transfer process has been completed, the surface of the photoreceptor drum 33 is cleaned by a cleaner 23 to collect residual waste toner, and is then removed by a static elimination charger 24 and a static elimination lamp 25.
After being electrically neutralized, 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. Then n8
It is determined whether or not there is any key input by the operator, and if there is no key input, the process proceeds to n9 and it is determined whether or not the timer T has timed out. If the timer T has not timed up at n9, the process returns to n8. n
If timer T times up in 9, nlo
The original drum 7 is rotated irrespective of the copying operation, and the original wrapped once around the original drum 7 is ejected onto the original ejection tray 3 by the operation of the original ejection rollers 8 and 9.

If there is a key input at n8, the timer T is reset to nil, and operations corresponding to the operated keys are performed at n12 to nt4. That is, when the eject key 36 is operated, [skip from 112 to nlO,
The document wound around the document drum 7 is immediately discharged.

If Bruf key 35 is operated, n13 to n6
Skip to and perform preliminary copying operations. If the print switch 34 is operated, the process advances from n14 to n15. n
If the print switch 34 is not operated in step 14, that is, if another key operation such as changing the copying condition setting is performed in n8, the process skips to n2.

If the print switch 34 is operated at n3 or n14, the process advances to n15, and at n5, the process moves to n5 for the original fed from the original tray 2 and wrapped around the original drum 7.
Copying operations are performed for the number of copies input in step 2. Then, in n16, the original is ejected to the original ejection tray 3, and n16
At step 17, it is determined whether or not there is the next original on the original tray 2. If there is a next document at n17, the process proceeds 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 in n6 until the timer T times up or during the copying operation in n15, the original remains stuck to the original drum 7 when the power is turned off. be put in a state of In order to prevent the document still wrapped above from causing an accident such as a jam during the next copying operation, when the power is turned on next time in n21,
At step 22, it is determined whether or not there is a document on the document drum. If the document is wound around the document drum 7, the document is ejected at step n23. In the above operation, n22 corresponds to the document detecting means of the present invention, and n23 corresponds to the means for validating the operation of the document discharging means.

(3) Effects of the embodiment According to the present invention, with the above-described configuration and operation, n7 to
The timer means is operated after the preliminary copying operation is completed by the operation of nlO, and the original is ejected when a certain period of time has elapsed without inputting the next operation, thereby preventing the original from remaining at the copying position for a long time.

In addition, if it becomes necessary to cancel the copying operation or correct the document placement order after the preliminary copying operation is completed, press the eject key 3.
By performing the operation in step 6, the original can be ejected immediately. Further, even 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) Another aspect In n17, when the next original is placed on the original tray 2, it is possible to skip to n5 and enable selection of 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 schematic structure of a copying machine equipped with the same automatic document feeder. FIG. 3 is a front view of the operation section of the copying machine equipped with the automatic document feeder. 7-M document drum, 15-automatic document feeder.

Claims (1)

[Claims] (1) When single or multiple copy copy operation is set,
In a copying machine equipped with an automatic document feeder having a means for selecting and inputting a preliminary copying operation mode in which a document is conveyed to a copying position, a single copying operation is performed, and the document is left at the copying position. an original ejecting means for ejecting the original remaining in the original position to the outside; an original detecting means for detecting that the original is at the copying position; and an original ejecting means when the original detecting means detects the original when the power is turned on. A copying machine equipped with an automatic document feeder comprising means for enabling the operation of the copying machine.