JPS60242162A - Image forming device - Google Patents

Abstract

PURPOSE:To make an original dischargeable in an easy manner even in either case of being conveyed by an original feeder or being placed by manual operation, by installing a controlling device which forcibly discharges the original placed on the specified position with the original feeder. CONSTITUTION:When a control program is selected to a program for copying motion by means of manual operation, a belt 40 starts its driving motion, and when a switch is turned on, a timer is set in motion, while if this timer goes out, that whether a paper discharge switch is turned on or not is judged, and when the switch is on, it is so judged that a paper jam occurs inside an ADF3 whereb trouble measures are carried out. On the other hand, if the paper discharge switch is not turn on, it is so judged that an original 0 is normally conveyed forward, and thereby the belt 40 is rotated for a given period of time, discharging the original 0 on an original mount 2 onto a tray 51, and this paper discharging mode is restored to a normal operation mode after it is over. Thus, after the original placed on the original mount by hand gets through, the original is dischargeable with the ADF without opening an original cover and taking out the original.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus such as a copying machine equipped with a document feeding device.

[Technical background of the invention and its problems]

2. Description of the Related Art Recently, for example, in copying machines, various types of copying machines to which a document feeder can be attached have been developed, in which a plurality of documents are sequentially conveyed onto a document table and processed. However, although this device is quick and extremely convenient when processing multiple documents, when processing a small number of documents, especially a single document, the document feeder is used to move the document onto the document table. It is easier and more reliable to manually place the document directly on the document table than to transport it, and above all, it eliminates the waste of using the document feeder. The original manually placed on the original table is copied after the original cover is closed, as in a general copying machine.

After copying is completed, in a typical copying machine, the document is ejected by opening the document cover and taking out the document. However, in a copying machine equipped with a document feeder, the document cover also serves as the document feeder f, and is therefore heavier than the document cover of a general copying machine. Furthermore, when the next copy involves a plurality of documents, a document feeder is used, which requires the troublesome work of opening and then closing the document cover.

[Purpose of the invention]

The present invention was developed based on the above-mentioned circumstances, and an object of the present invention is to provide an extremely convenient and practical image forming apparatus that can eject an original after copying with a relatively simple operation.

[Summary of the invention]

In order to achieve the above object, the present invention provides an image forming apparatus that includes a document feeding device that conveys a document to a predetermined position and forms an image corresponding to the document placed at the predetermined position.
The control means for forcibly ejecting a document placed at a predetermined position using a document feeder is provided, and even when the document is conveyed to a predetermined position by the document feeder,
The image forming apparatus is capable of ejecting the original after copying with a relatively simple operation even when the original is placed manually.

[Embodiments of the invention]

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. .

FIG. 1 shows an image forming apparatus according to an embodiment of the present invention, for example, a copying machine equipped with a document feeder (hereinafter abbreviated as KADF). That is, 1 is a copying machine main body (hereinafter simply referred to as the main body), and on the top surface of this main body 1 is provided an original table (transparent glass plate) 2 on which an original document O is placed. is ADF3
is provided so that it can be opened and closed freely. On the bottom side of document table 2,
Exposure rung 4, mirrors 5, 6 that reciprocate in the direction of the arrow shown in the figure
．． 7, an exposure optical system 10 consisting of a lens block 8 movable in the optical axis direction and a fixed mirror 9 is provided.
By optically scanning the surface of the document using the exposure optical system 10, the image of the document 0 is formed on the surface of the photoreceptor drum 11 (
〇Photoconductor drum l designed for slit exposure)
i & yo Rotate in the direction of the arrow shown, first 41) Electric Teidenki 1
2 charges the surface, and then the image is exposed to slit light to form an electrostatic latent image on the surface. This electrostatic latent image is made visible by applying toner to it by the developing device 13. The charge is removed by a pre-transfer charge removal lamp 14.

On the other hand, the paper PVi is taken out one by one from the selected upper paper feed cassette 15 or lower paper feed cassette 16 by the delivery rollers 17 or 18, respectively, and is taken out from the paper guide path 19.
Alternatively, it is guided to the registration rollers 21 through the rollers 2(), and guided to the transfer section 22 by the registration rollers 21. Here, the paper feed cassettes 15 and 16 are detachably provided at the lower right end of the main body 1, and one of them can be selected from an operation panel (not shown). In this way, the paper P sent to the transfer unit 22 comes into close contact with the surface of the photoreceptor drum 11 at the transfer charger 23, and the toner image on the photoreceptor drum 11 is formed by the action of the charger 230. transcribed.

This transferred paper P is removed by the action of the peeling charger 24.
The paper is electrostatically peeled off from the photoreceptor drum 11 and transferred to the paper transport path 2.
5 is conveyed, and sent to a heat roller 26 as a fixing device provided at the end of the sheet, and the edge transfer image is fixed by passing through this. It is ejected to the outside of the main body 1 and placed in the tray 28.
You will be guided to. Further, after the transfer, the photosensitive drum 11 is returned to its initial state by removing residual toner on the surface by a cleaner 29 and erasing an afterimage by a static elimination lamp 30.

The ADF 3 includes a feeding section 31 and a conveying section 32.

The feeding section 31 includes a tray 33 as a document placing section on which all documents can be placed at once, a stopper 34 that temporarily holds the documents placed on the tray 33, a document feed roller 35,
It has a take-out roller 36 and a registration roller 37.

The tray 33 is inclined about 30 degrees so that the document O placed thereon can fall to the position of the take-out roller 36 by its own weight. In addition, the stopper 34t'i and the shaft 38 are rotatable in the direction of the arrow in the figure as a full fulcrum, and the tray 34t'i
When holding a document, it protrudes above the tray 33 to hold the leading edge of the document 0, and the solenoid 3
When the original 0 is rotated downward by 9 and retracted below the tray 33, the holding of the original 0 is released. In this case, even after the document 0 is released from being held, the stopper 34 rotates periodically to apply vibrations to the document O from below, thereby making it easy to take out the document 0. Further, the document feed roller 35 rotates in the direction of the arrow shown in the figure (7 moves up and down in conjunction with the protruding and retracting operation of the stopper 34, and moves downward at the same time as the stopper 34 retreats below the tray 33, and at this time, It rolls into contact with the top of the document 0 that falls under its own weight, and feeds it so that the top document 0 comes out in front.The folded take-out roller 361d is a pair of rollers that rotate in opposite directions, and the document 0
It is possible to take out one sheet at a time. Then, the registration roller 37 sends the document Of taken out by the take-out roller 36 to the conveying section 32 at the appropriate timing, and
It is designed to correct the tilt, etc.

On the other hand, the conveyance section 32 includes an endless belt (hereinafter simply referred to as belt) 40 for conveying the document, rollers 41 and 42 on which the belt 40 is mounted, and rollers 43 and 44 degrees that press the belt 40 onto the document table 2. 45.46, a stopper 47 for temporarily holding all the documents sent onto the document table 2, and a discharge roller 48 are installed. The stopper 47 is rotatable in the direction of the arrow shown in the figure with a shaft 49 as a fulcrum, and normally holds the entire tip of the original WRO in the state shown in the figure, and when rotated downward by the solenoid 50, holds the tip of document 0. The state is now set to be released. Note that the tray 51 is fixed to the main body 1 so as to receive the discharged original O.

Furthermore, ADF3vc has a plurality of detection levers 52.
53, 54 and these detection levers 52, 53, 54 are provided with microswitches (not shown) that move respectively. Detection 1/bar 52tri is for fully detecting whether or not the document O is present on the tray 33, and the detection lever 53 is used to ensure that the document O is fed and not sent to the transport section 32. The detection lever 54 is used to fully detect that document 0 has been ejected. A detector 55 for detecting opening/closing of the conveying section 32 is provided in the ADF 3.

The operation of Al)F 3 in the above configuration will be explained. 1. Place originals 0 all at once on tray 3: (Place 2 on top as well as 3.
7. Next, with the operation to start copying, the solenoid 50 is activated to retract the stopper 47 below the document table 20], and the belt 40 runs to eject any documents that may remain on the document table 2. An action is taken. At the same time, the solenoid 39 is activated to retract the stopper 34 below the tray 33, and the document 0 on the tray 33 is removed from the take-out roller 36.
1. In this case, the registration rollers 37 are in a stopped state for a certain period of time, and during that time, the document 0 is sent to the registration rollers 37 by the take-out rollers 36. ,
The tilt of the tip is corrected. And registration roller 37
When the document 0 rotates, the document 0 is fed into the conveying section 32. Note that when the registration roller 37 starts rotating, the take-out roller 36
The rotation of the stopper 47 is stopped and the stopper 47 is returned to the holding position.

In this way, the document O fed into the conveying section 32 is conveyed by the bell 40 until it comes into contact with the stopper 47, and then stopped. In this case, the leading edge of document 0 is at stopper 47t.
The original sO is aligned by continuing to run the belt 40 for a certain period of time from the point of contact with the fc. In this way, when the original 0 is placed on the original table 2, the original 0 is copied. When the copying is completed, the solenoid 50 is activated to retract the stopper 47 and the belt 40 runs, and the copied original 0 is ejected from the original platen 2.◎This ejected original O is ejected. The paper is discharged onto the tray 51 by the paper roller 48. During this ejection operation, the original is detected by the detection lever 52, and the above-mentioned original ejection operation is repeated. Got it,
At this time, when the detection lever 54 detects the ejection of the document C), the stopper 47 returns to the holding position.

FIG. 2 shows the operation panel 61. Copy key 62 for executing the ADF 3, ADF key 63 as an input means for instructing all independent operations of the ADF 3, numeric keypad 64 for setting the number of copies, etc., number display section 65 for displaying the number of copies, upper paper feed An upper cassette selection key 66 for selecting the cassette 15, a lower cassette selection key 67 for selecting the lower paper feed cassette 16, a liquid crystal display section 68 for displaying operating status and selection status of copying conditions, etc., a copying density setting device 69, and a copying machine. A magnification specifying key 70 and the like for specifying the magnification are provided respectively.

Next, an example of a control means for controlling the operation of the copying machine configured as described above will be explained with reference to the block diagram shown in FIG.

First, the copying machine control section 71 operates the operation panel 6 shown in FIG.
1 and other switches, receiving signals from the detection unit 72,
It controls the drive system/process system 73, each display section 65, 68 of the operation panel 61, etc., and controls the entire copying operation. The copying machine control section 71 is mainly composed of a microcomputer and its peripheral circuits, operates according to programs stored in advance in a built-in memory (ROM), and performs various controls.

Next, the ADF control unit 74 controls the detector 55 and the detection lever 5.
ADF drive motor (hereinafter simply referred to as motor) 78 and solenoid 39
50, etc., and controls the entire ADF 3. Like the copying machine control section 71, this ADF control section 74 is also mainly composed of a microcomputer and its peripheral circuits, operates according to programs stored in advance in a built-in memory, and performs various controls. Further, the motor 78 is
It is a DC brushless morph that rotates forward and reverse, and by utilizing the forward or reverse rotation of this motor 78, it can rotate the document feed roller 35, rotate the take-out roller 36, and rotate the registration roller 37, even though it is a single motor. 40 is running, and the paper discharge roller 48 is rotating. Furthermore, the copying machine control section 71 and the ADF control section 74fl pass line 7
connected by 9.

In this way, the ADF control unit 74 outputs the ADF set signal ADF-8ET, the original set signal 0RG-RDY,
Jam signal ADF-JAM1 and motor stop signal MOT
-8TP are output respectively, and these signals are transmitted to the copying machine control section 7.
◎Signal ADF-8ET that is input to the detector 55
is turned on when it detects that the transport section 32 of the ADF 3 is closed, and a program is selected so that the control sequence includes the copying machine control section 71A D'F 3 'fr. Signals ORC, -RDY A copying operation is performed on the original sO on the tray 33 by the H1 detection lever 52 and the original detection switch 75. Signal ADF-
JAMl-1, if document 0 is not detected by the detection lever 53 and switch 76 within a certain period of time after the take-out roller 36 starts rotating, or within a certain period of time after document 0 has been detected by switch 76. This signal ADF-JAM, which is output when a jam occurs in the ADFa, such as when the original O is not detected by the lever 54 and the paper ejection switch 77, is output from the ADF control unit 74.
is output by accepting signals from the document detection switch 75 and switch 76 and determining whether or not they correspond to the above case. The signal MOT-8TP indicates the operating state of the ADF 3 and is a command signal for causing the copying machine control section 71 to start a copying operation.

On the other hand, the copying machine control section 71 outputs the document preparation signal 0RG-
8ET, original insertion signal 0RG-IN.

and document discharge signal 0RG-OUT are output, respectively, and these signals are input to the ADF control section 74, respectively. Signal OR
(, -8gT means that the document 0 on the tray 33 is taken out by the take-out roller 3.
61 and the document 0 remaining on the document table z
If there is, it is a command signal to discharge it. signal 0
The RG-IN operates the take-out roller 36, the registration roller 37, and the belt 40 to send the document 0 onto the document table 2, and also to eject the document 0 remaining on the document table 2, if any. It is a command signal. Signal 0RG-OUT
is a command signal for discharging all 0 originals present on the original platen 2 to the tray 51. Here, the timing at which these signals are output will be explained as follows. First, a signal 0RG-8ET is output, which causes the estopper 34 to retreat and the documents 0 to be taken out at once by the take-out roller 36.
sent to. Next, on condition that the signal 0RG-RDY is on/off, the signal 0RG-IN is output every time the original is replaced. As a result, the original 0 can be set on the M combination 2. If the signal 0RG-RDY is turned off, the signal 0RG-OUT is output and the last document 0 is ejected.

Furthermore, when the signal ADF-8ET is turned off, the Dli''-JAM signal is turned on. If the required number of copies have not been completed, signal 0RG-8ET is output, and thereafter signal 0RG-I is output.
N is output repeatedly.

Next, the control operations of the copying machine control section 71 and the ADF control section 74 will be explained with reference to the flowchart shown in FIG. ADF control unit 74il-t: checks whether the detector 55 is turned on, and if it is turned on, proceeds to the next step and checks whether the document detection switch 75 is turned on-1-h. It is checked that the original detection switch 75 is on (discussed when the original 0 is placed on the tray 33). When the ADD" key 63 is pressed, the signal is sent to the copying machine control section. A via 71 and pass line 79;
By being sent to the DF control unit 74, the control program is switched to a program for operating the ADF alone. (
(Fig. 4 ■) At the same time, the ADF control section 74 outputs the signal MOT-
8TP k is turned off to prohibit copying operations. Note that the off state of the signal MOT-8TP is maintained until the independent operation of ViADF is completed. The ADF control unit 74 again checks the state of the document detection switch 75 (fl1% f<), and if it is off, that is, if there is no document 0 on the tray 33, the belt 40 is rotated for a certain period of time, and the document 0 on the document table 2 is moved to the tray. 51
The ADF single operation mode is completed by ejecting the liquid to the top. In other words, after carrying out the same operation as when the signal 0RG-OUT was output, the ADF returns from the single operation mode to the normal mode.On the other hand, if the document detection switch 75 is on, the ADF
F independent operation is repeated until there is no original 0 on the tray 33 ◇ Next, the detector 55 is turned on and the original detection switch 75 is also turned on (original 0 is placed on the tray 33). Although ADF is checked,
If the key 63 is not pressed and the copy key 62 is turned on, a copying operation using the ADF 3 is performed. (Fig. 4 ■) After completing a series of copying processes, the original detection switch 75
When the is turned off, the normal copy mode is ended by rotating the belt 40 for a certain period of time and ejecting the original 0 on the original table z onto the tray 51. On the other hand, the original detection switch 75
is on, the copying operation using the ADF 3 is repeated until there is no original 0 on the tray 33.Finally, we will explain the mode of the present invention in which the original 0 is manually set on the document table 2 and the copying operation is performed. . Similar to the ADF independent operation mode described above, the ADF control section 74
When the detector 55 is turned on, the document detection switch 75
Checks whether or not the document detection 75 is turned on. Here, it is checked that the document detection 75 is turned off (original 0 is not placed on the tray 33), and when the ADF key 63 is pressed, the A signal is sent to the ADF control section 74 via the copying machine control section 71 and the pass line 79, thereby switching the control program to a program for manual copying operation. (Figure 4 ◎) Then the bell) 40 starts driving. When the switch 76 is turned on, the timer is set. 0 Checks whether the timer has timed out or not. When the timer has timed out, it checks whether the waste paper switch 77 is on or not.
It is determined that a jam has occurred within the machine and the abnormality is dealt with. on the other hand,
Ejection A (If the °C switch 77 is not turned on, it is assumed that document 0 is being transported normally, and the alarm will ring for a certain period of time)
40'
The mode of the present invention is completed by discharging the liquid to the top. That is, after performing the same trb operation as when the signal 0RG-OUT was output, the mode of the present invention returns to the normal operation mode.

As described above, after copying a document manually set on the document table, it is possible to eject the document using the ADF'r without opening the document cover and taking out the document.

In the above embodiment, a microcomputer is used as the control means, but a simple logic circuit may also be used. Furthermore, although the explanation has been given using a copying machine as an example, the Mizumoto BA is not limited to this; for example, electronic printers, printing machines, facsimile machines, etc. are equipped with a document feeder that feeds the set document onto the document table. It can be applied to any image forming apparatus.

〔Effect of the invention〕

As explained above in explanations 1 and 7, according to the present invention, it is relatively easy to place a document in a predetermined position, whether it is conveyed by the document feeder or manually placed. With simple operations, you can eject the original after it has been copied.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a copying machine equipped with a document feeder according to an embodiment of the present invention, FIG. 2 is a plan view of an operation panel provided in the copying machine shown in FIG. 1, and FIG. 3 4 is a block diagram showing an example of a control means in the copying machine of FIG.
This figure is a flowchart for explaining the entire operation of the block diagram shown in FIG. 3. 0... Original, 1... Copying machine main body (image forming device), 2...
... Document table (predetermined position), 3 ... ADF (w, document feeding device), 71 ... Copy machine control unit (control means), 74
・ADF control unit (control means) 0

Claims (4)

[Claims] (1) In an image forming apparatus that is equipped with a document feeding device that conveys a document to a predetermined position and forms an image corresponding to the document placed in the predetermined position, the document placed in the predetermined position is
An image forming apparatus comprising: a control means for forcibly ejecting the document using the document feeding device. (2) The control means detects that there is no document in the document feeder and forcibly ejects the document placed at a predetermined position. image forming device. (3) The image forming apparatus according to claim 1 or 2, wherein the control means is a microcomputer. (4) The image forming apparatus according to claim 1 or TI'i, wherein the control means is a logic circuit.