JPS58209758A - Copying device - Google Patents

Abstract

PURPOSE:To keep the originals, which are inserted and set in an automatic original feeder, free from damage, by providing a locking mechanism which locks the automatic original feeder selectively and operating the locking mechanism during the use of the automatic original feeder so as to make the disengagement of said feeder from the body of a copying device impossible. CONSTITUTION:A driving roll 64, a separating roll 66, and a front roll 69 are driven to convey laminated originals between the roll 66 and a pressure plate 67 in accordance with the signal detected with an insertion sensor 63. The driving of the rolls 64, 66, 69 is stopped upon lapse of a prescribed time after a sensor 68 for detecting the original detects are preceding end of the original so that the forward end of the original is positioned between the roll 69 and a sensor 70 for detecting the original. The operator operates a start switch 72 to drive the rolls 64, 66, 69 again, thereby feeding the 1st sheet of the original through the sensor 70 to an exposing part 3. The preceding end of the next 2nd sheet of the original is positioned between the roll 69 and the sensor 70. The 2nd sheet of the original is fed to the part 3 by driving the rolls 64, 66, 69 with the signal for end of the copying of the original. Thereafter, the laminated originals are automatically separated and are fed by each sheet with the rolls of which the driving is controlled in the same way as mentioned above.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a abdominal imaging device that is removably equipped with a Haraaki automatic feeding device that feeds images one by one.

Various types of copying devices have been proposed in the past, and the applicant has also proposed, for example, Japanese Patent Application Laid-Open No. 54-187848, F! 54-
In Japanese Patent No. 187850, an electrostatic latent image is formed on a photosensitive drum by exposure scanning while moving the original, and toner development and transfer are repeatedly performed on this electrostatic latent image once formed, thereby making multiple copies. A copying apparatus P has been proposed which has a so-called multi-sheet copying function.

FIG. 1 is a diagrammatic cross-sectional view showing the configuration of an example of a copying apparatus that the applicant has already proposed.0 A manuscript table 2, an exposure section 8L, and a manuscript tray 4 are slanted in the upper part of the copying machine main body 1. A 0-sheet original 5 provided at The document is held and conveyed, and when the $2 document detection switch No. 8 is activated, the conveyance is temporarily stopped. In the copying apparatus shown in FIG. 1, the timing for controlling the operations of each part is based on the moment when the second document detection switch 8 detects the leading edge of the document. After that, the document is resumed at a predetermined timing. While passing over transparent plate 9 , it is illuminated by light source 10 , and the original image is projected onto photosensitive drum 12 via convergent optical fiber array 11 . The photosensitive drum 12 rotates in the direction of arrow B at the same circumferential speed as the original transport speed.
The document is uniformly charged in advance by a corona charger 18, and by projecting the original image through the focusing optical fiber array 11, a corresponding % latent image is formed. The sheet original 5 that has passed through the transparent plate 9 is delivered to the original ejection rollers 14A and 14B.
The document is held and fed by the document tray 4, and is discharged onto the document tray 4. Reference numerals 15A and 15B indicate the photosensitive drum 12 corresponding to the recording paper to be used with the vertical and horizontal trimming lamps.
These trimming lamps 15A are used if the purpose is to illuminate areas other than the upper area to erase static charges in unnecessary areas.
, 15B is an unnecessary charge injected from the transfer roller to the drum 1z via the recording paper when performing multiple copies per exposure to obtain multiple copies from an electrostatic latent image once formed on the photosensitive drum 12. It also has the role of removing . The electrostatic layer formed in this way is conveyed, and the toner image is transferred onto the recording paper. Further, this cup (-18) is rotatably pivoted to the main body 1 via a support shaft 19.

When copying a thick document such as a book, the cover 18F is rotated about the support shaft 19 in the direction of arrow O to the position shown by the imaginary line, and in this state, the carrier on which the thick document to be copied is placed is rotated. The sheet document is conveyed along the conveyance path described above, and the document image B is transferred to the photosensitive drum 1B in the same sequence.
I try to project it upwards.

On the other hand, the recording paper 21 in the recording paper power set 20 is fed out one by one by the oscillating and rotating pickup roller 22, and then transferred to the recording paper feed register row 28 to feed the toner. The toner image is sent to the transfer g17 at the timing when the leading edge of the image and the leading edge of the recording paper coincide, and the toner image is transferred by the action of the bias transfer roller 24. By using such a bias transfer roller, - multiple exposures can be performed. The recording paper after the transfer of the zero toner, which can effectively maintain the electrostatic latent image on the photosensitive drum 12 without deteriorating during copying, is processed by the air flow blown from the peeling claw z5 and the duct 26. It is peeled off from the photosensitive drum 12, advances along the guide plate 27, is conveyed by the conveyance roller 28 into the fixing device 29, is fixed there, and is discharged to the copy tray 82 by the discharge roller 81. When obtaining a copy image from an electrostatic latent image once formed, residual toner remaining on the photosensitive drum 12'' without being transferred is brushed off by the rotating cleaning brush 8B, and this toner is removed by the fan 84. The airflow generated by the rotation is used to suck the toner, and the filter 85 captures it.In this copying machine, the fan 84 is also used to generate the airflow for separating the recording paper from the fan 26. The dropped photosensitive drum 12 is uniformly exposed by an erasing lamp 86, thereby erasing residual charges such as an electrostatic latent image, and repeating an OV-shaped electrostatic latent image in preparation for copying the next document. In the case of single-exposure multi-copying, in which the final transfer is completed, the cleaning brush 88 is moved to the shaft 8 to prevent the electrostatic latent image on the photosensitive drum 12 from deteriorating. It is rotated to the center and separated from the photosensitive drum 12 to prevent the remaining toner from being pasted, and the erase lamp 86 is also turned off.

Further, the applicant detachably attaches an automatic document feeder 512 as shown in FIG. 2 to the copying machine l shown in FIG. We have developed a device that automatically separates the sheets and feeds them one by one to the exposure section 8 of the copying device 1. The automatic document feeder 51 shown in FIG.
is pivotably attached to the outside of the document table 2 on the back side of the copying device 1, and when the automatic document feeder 51 is not used, it can be attached and removed by rotating it and separating it from the document table 2. However, when using such a device, the automatic document feeder 5"
When copying using the document tray 2, the automatic document feeder 51 may be accidentally moved away from the document tray 2 in order to copy an original document such as a book using the document tray 2. If the fed sheet document extends into the automatic document feeder 1151 while being held by the document feed rollers 7A and 7B of the copying apparatus main body l, the document will be damaged. 0 The present invention has been made in consideration of the above points, and an object of the present invention is to provide a copying apparatus that is appropriately configured so as not to damage originals inserted into an automatic original feeder. It is something.

The present invention provides a copying machine that is removably equipped with an automatic document feeder that automatically separates stacked documents and feeds them one by one. The present invention will be described in detail with reference to the drawings, in which a locking mechanism is provided, and the locking mechanism is activated during use of the automatic document feeder to remove it from the main body of the copying apparatus.

FIG. 4 is a diagram showing the configuration of an example of the essential parts of the copying apparatus of the present invention. In this example, when the automatic document feeder 51 is mounted on the document table 2 of the copying device main body 1, a magnetic plate 55 is installed on the copying device main body 1, and an electromagnetic magnet is attached to the automatic document feeder 51 so that the automatic document feeder 51 faces closely to the original feeder 51 on the document table 2 of the main body 1 of the copier. 56 are provided respectively.

In this example, the automatic document feeder 51 has an insertion slot 6 for stacked documents.
1 and the exit 6''2 for feeding the separated original to the exposure section 3 of the copying device 1. An original insertion sensor 68 consisting of a photointerrupter area, a pair of drive rollers 64 and A slave roller 65 comprising a driven roller 65, a separation roller 66, a pressure plate 67 in pressure contact therewith, a document detection sensor 68 made of a photo interrupter, a pair of front rows 269, and a document detection sensor 70 made of a photo interrupter. The drive roller 64, the separation roller 66, and the pre-processing roller 69 are driven by the drive roller 64, the separation roller 66, and the pre-processing roller 69. The insertion sensor 68, the document detection sensor 68, the copy end signal L from the copying device main body 1, and the start switch 72 and stop switch 7B provided on the operation panel 71 of the automatic document feeder 51. In other words, in this example, first the insertion port 61 is
The insertion sensor 68 detects the stacked original inserted into the holder, and the signal is used to drive the drive roller 64, separation roller 66, and pre-work roller 69 to convey the stacked original between the separation roller 66 and the pressure plate 67. Here, only the lowest layer of the document is separated and fed to the front roller 69 via the document detection sensor 68'F. After a predetermined period of time has elapsed since the document detection sensor 68 detected the leading edge of the separated and fed document, the drive roller 64, the separation roller 66, and the pre-processing roller 69 stop driving, and the document is transferred so that the leading edge of the document is moved to the front roller 69. and the document width sensor 70.
They will be sent to the shelter and put on standby. Next, by operating the start switch 72, the drive roller 64, separation roller 66, and front roller 69f are driven again to send the first document through the document detection sensor 70 and exit 62 to the copying machine main body l. While feeding the document to the exposure section 3, the leading edge of the next second document is placed between the front roller 69 and the original detection sensor 70 and placed on standby. This second document is fed to the light filtering section 8 by driving the drive roller 64, separation roller 66, and front roller 69, which respond to the copy end signal of the previous document from the main body 1 of the copying apparatus. Thereafter, in the same manner, the drive roller 64,
By controlling the driving of the separation roller 66 and the front roller 69, the inserted stacked documents are automatically separated and fed one by one. Note that the stop switch 78 is for forcibly canceling automatic feeding.

In this example, the document detection sensor 7 placed near the exit 62
The electromagnet 56 is energized based on the original detection signal of 0, and the original automatic feeder 51 is magnetically locked to the main body 1 of the copying machine. FIG. 5 shows an example of the circuit configuration. The outputs of the document detection sensor 70L and the start switch 72 shown in FIG.
(Central control unit) 88.

After the start switch 72 is fully operated and the pressure of the inverter 82 reaches the L level, the CPU 83 receives the output of the document detection sensor 70 and detects that the output of the inverter 81 has switched from the L level to the H level. The detection sensor 70 detects the document P and latches it into the CPU 88.
This latched H level output signal is connected to the NAND circuit 8.
4 to one input terminal. This NAND circuit 84
A stop switch 78 is connected to the other input terminal of the stop switch 78, which normally outputs an L level output when operated at an H level, and generates a signal P.
A transistor 86 is switched to the output of the NAND circuit 84 via an EL inverter 852, and the EL magnet 56 is selectively energized. Therefore, the electromagnet 56 is energized when the start switch 72 is operated and the document detection sensor 70 detects a document, thereby magnetically locking the automatic document feeder 51 to the copying apparatus main body 1. Is it locked by operating the stop switch 73 in the state? Can be canceled. Further, after the copying device generates a copy end signal for a certain daughter manuscript, the next manuscript is sent to the second manuscript detection switch 8 at a predetermined timing.
Write a reset signal when it does not reach this reset signal? It is supplied to the 0'PU 88 via the input terminal 87. Upon receiving this reset signal, the CPU 88 performs NAND
The output supplied to the circuit 84 is set to L level, and the electromagnet 56 is turned off by making the switching transistor 86 non-conductive.
In this way, if there is a document in the automatic document feeder 51, the automatic document feeder 51 will be automatically While the feeding device 51 is in use,
Unless the stop switch 78Tt is operated, the automatic document feeder 51 will be magnetically locked to the copying apparatus main body 1, so if you accidentally copy an original document such as a book using the document table 2, Even if you try to separate the automatic document feeder 512 from the document table 2, it will not separate, and therefore the document inserted into the automatic document feeder #51 will not be damaged. can be effectively protected.

It should be noted that the present invention is not limited to the above-mentioned example, and can be modified or changed in many ways.

For example, in the example described above, the electromagnet 56 was provided on the automatic document feeder 51 side, and the magnetic plate 55 was provided on the copying device main body 1 side.
These electromagnets 562 and magnetic plates 55 may be arranged in the opposite manner). Furthermore, instead of using the mechanical electromagnet 56 or the magnetic plate 55F, it is also possible to use, for example, a mechanical locking mechanism shown in Figure 6. That is, a hook 92 is provided on the automatic document feeder 51 side by a spring 91 that is biased to rotate in the L direction, and a lever 94 having a retaining piece 93 that engages with the hook 9z is provided on the copying apparatus main body 1 side. When this lever 94 is rotated and biased by a spring 95 in the direction in which the engagement piece 98 engages with the hook 92, a solenoid 96 is provided on the side where this i-generated spring 95 is provided, and this solenoid 96 is activated. The hook 9z and the locking piece 93 are energized in the same way as the electromagnet 56 described above, and the hook 9z and the locking piece 93 are locked in the form of a locking platform, and the solenoid 96 is deenergized. Even if the engagement between the hook 92 and the engagement piece 98 is released by rotating the lever 94 against the force of the spring 95,
In the above-mentioned example, the separated and fed stylus is placed on standby with its leading edge positioned between the front roller 69 and the document detection sensor 7o when the document detection signal from the document detection sensor 68 is detected. The document separated and fed without using the sensor 68 may be placed on standby at the time when the document detection sensor 70 detects the leading edge of the document. Furthermore, in the above example, the original detection signal of the original detection sensor 70 is latched after the start switch 72 is operated, but when the original detection sensor 7o is detecting the original, that is, when the original is exposed The electromagnet 56 or the solenoid 96 may be energized only during the period when the fluid is being fed to the section 8.

As mentioned above, in Mizutoriku, when the LIil automatic document feeder is in use, it is hooked into the main body of the copying machine, so there is no risk of damaging the originals inserted into the automatic document feeder. Not this? can be effectively protected.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of an example of a main body of a copying machine to which the present invention can be applied, and Fig. 2 shows a state in which an automatic document feeder is attached to a first copying machine. FIG. 8 is a diagram showing an example of the attachment/detachment mechanism of the automatic document feeder to the main body of the copying apparatus; FIG. 4 is a diagram showing a configuration 2 of an example of the essential parts of the copying apparatus of the present invention; FIG. 5 FIG. 6 is a diagram showing the configuration of an example of the side-turning circuit, and FIG. 6 is a diagram showing the configuration of another example of the essential parts of the copying apparatus of the present invention. DESCRIPTION OF SYMBOLS 1-- Copying apparatus main body, 2-- Document table, 3... Exposure section, 6... First document detection switch, 7A, 7B... Original feed low roller, 8... Cabinet 2 document detection switch, 51... document feeder, 61.
...Insertion port, 62...Exit, 6B...Document insertion sensor, 64...Drive roller, 65...Followed roller,
66... Separation roller, 67... Pressure plate, 68.70
---Manuscript saving sensor, 71 ---Operation panel, 72-
-・Start switch, 78...Strug switch,
81, 82.85...Inverter, 83...CPU
, 84... NAND circuit, 86... switching transistor, 87... input terminal, 91... spring, 9
2...Hook, 93...Locking piece, 94...Lever, 95...Spring, 96...Lunoid. Patent applicant Olympus Optical Industry Co., Ltd. Figure 4 5I

Claims (1)

[Claims] L. In a copying machine that is removably equipped with an automatic document feeder that automatically separates and feeds rejected originals one by one, the automatic document feeder is selectively attached to the main body of the copying machine. A copying apparatus characterized in that a locking mechanism is provided, and the locking mechanism is activated while the automatic document feeder is in use to make it impossible to separate from the copying apparatus main body.