JPH0664303B2 - Automatic document feeder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder, and more particularly to an automatic document feeder used for image forming equipment such as a copying machine or an information recording apparatus.

More specifically, the present invention relates to an automatic document feeder for an image forming apparatus which has an image area designating function and automatically aligns and discharges a copy document on an exposure document platen (platen).

The following description will be given by taking an automatic document feeder and an area designating device (hereinafter referred to as a digitizer) used in a copying machine as an example.

[Prior Art] Conventionally, in a copying apparatus, when copying a document,
Originals have been placed on the original placing table manually, but in recent years, when copying a plurality of sheet originals, it is not possible to manually place each sheet original on the original placing table. Since the efficiency is low, a sheet document is automatically conveyed and a device for automatically copying is presented and used.

For example, FIG. 9 is a sectional view showing one embodiment of an automatic sheet document feeder of the present invention. In Figure 1,
Reference numeral 1 is an entrance tray for stacking sheet originals. The sheet originals 2 on the entrance tray 1 are stacked with the lower side in the figure facing the front (image surface). In addition, Pickup Roller 3
Is made of a rubber-based material having a large friction coefficient and swings around the feed roller shaft 10. The feed roller shaft 10 has a feed roller 5 (the same material as the pickup roller 3).
Is fixed, and the feed roller shaft 10 rotates and rotates, and this rotation is also transmitted to the pick-up roller 3 by a gear (not shown) so that the feed roller 5 and the pick-up roller 3 are in the same rotation direction. Further, the peripheral speeds of the rollers are the same. A rotation shaft (not shown) of the first paper feed roller 4 is fixed to the paper feed tray 1, a sheet original 2 is inserted between the pick up roller 3 and the first paper feed roller 4, and the pick up roller 3 is When the original is pressed and conveyed, the original is driven.

The second paper feed roller 6 is slidable so as to have a pressing force toward the paper feed roller shaft 10.
When the sheet document passes between the feed roller 5 and the second feed roller 6, it is configured to be driven. Further, the pick-up arm 8 swings around the pick-up arm shaft 7 as a swing shaft, and has a U-shaped groove 9a at one end.
Then, the feed roller shaft 10 is engaged with the shaft 9b which is fixed to the paper feeding arm 9 which is swung about the swing shaft. Then, when the pick-up arm shaft 7 swings and rotates counterclockwise, the pick-up arm 8 swings counterclockwise, and the paper feeding arm 9 also swings counterclockwise about the feed roller shaft 10. At this time, the pick-up roller 3 is the first
Away from the paper feed roller 4. Then, when the pick-up arm shaft 7 swings and rotates clockwise, the pick-up arm 8 swings clockwise and the paper feed arm 9 also feeds the feed roller shaft 1.
It swings clockwise around 0. At this time, the pick-up roller 3 separated from the first paper feed roller 4 is
When the sheet original 2 is present, the sheet original is sandwiched and the sheet is ready to be fed.

The document presence / absence sensor 11 is a reflection type sensor for detecting the presence / absence of a sheet document. Also, the tip detection sensor 1
Reference numeral 2 is a reflective sensor that detects the leading edge of the sheet document.

Further, the full-face belt 15 is an endless belt having a width large enough to cover the entire surface of the sheet original, and the surface thereof is coated with a rubber material having a sufficient friction coefficient so that the original can be conveyed by friction. There is. In addition, even if it becomes dirty, it is treated so as to be removed with alcohol or the like. The entire belt 15 is connected to the drive roller 1
3 and the turn roller 19, the turn roller 19 is applied with a force on its shaft 19a in the left direction in FIG. 1, so that the belt 15 has sufficient tension so that the drive roller 13 and the full-face belt 15 do not slip. It is configured. In addition,
Reference numeral 14 is a drive shaft of the drive roller 13. Further, the presser rollers 16, 17, 18 are provided inside the full-face belt 15,
The feed roller 5 and the pressing roller 16, the pressing rollers 16 and 17, the pressing rollers 17 and 18, and the pressing roller 18 and the discharge roller 20 are located between the pinch, which is somewhat smaller than the size of the transportable sheet document. The rollers 16, 17, and 18 press the whole surface belt 15 against the original platen glass 47 between the main body of the copying machine with a weak pressure, and when the sheet original 2 passes between the original platen glass 47 and the whole surface belt 15, a conveying force is applied. Is increasing.

The discharge detection sensor 22 is a sensor that detects the discharge of the sheet original and turns on a jam lamp (not shown) if the original is not passed for a certain period of time.

Further, the discharge rollers 20 and 50 are pressed by the discharge rollers 21 and 51, and the sheet original, which has been copied, is pinched on the original platen glass 47 and is inserted into the discharge tray 61.
Discharge on top. The discharge rollers 20 and 50 are rotated by the drive belt 49, and the discharge rollers 21 and 51 are driven by the movement of the sheet document. Also, 519 is a discharge roller 51.
Is the axis of.

Next, in FIG. 6, the drive gear 42 is fixed to the rotary shaft 43 a of the motor 43, and the drive of the motor is transmitted to the gear 40 via the idler gear 41. Here, the rotation of the gear 40 is transmitted to the clutch shaft 44 by turning on / off the electromagnetic clutch 35, and when the electromagnetic clutch 35 is energized, it is O
The N state is set. Further, the electromagnetic brake 34 moves so as to stop the rotation of the clutch shaft 44, and when the electromagnetic brake 34 is energized, the rotation of the clutch shaft 44 stops. Gear 36
Is fixed to the clutch shaft 44, rotates when the clutch shaft 44 rotates, transmits the rotation to the clock disc gear 37, and increases the speed to rotate the clock disc 38. The clock disk 38 has fine grooves on its circumference, and the photo interrupter 39 reads the number of grooves to count the number of clocks. And clutch shaft 44
Is driven by the drive pulley 3 fixed to the clutch shaft 44.
3 and a belt 32 wound around a driven pulley 31 fixed to the drive roller shaft 14 and transmitted to the drive roller shaft 14. The pulley (large) 25 is attached to the drive roller shaft 14 via a spring clutch (not shown), and the spring clutch control ring 26 is attached to the plunger 27 by the clutch claw 2.
Drive transmission ON / OFF by controlling via 8
I do. Further, the pulley (small) 23 receives rotation transmission of the pulley (large) 25 via the belt 24, and is attached to the feed roller shaft 10 via a one-way clutch (not shown).

The ratio of the diameters of the pulley (large) 25 and the pulley (small) 23 is selected so that the peripheral speed of the entire belt 15 is slightly higher than the peripheral speed of the feed roller 5. The pulley (small) 23 and the feed roller shaft 10 are one-way connected so that the feed roller 5 follows the sheet document 2 when the sheet document 2 is gripped by the entire surface belt 15 and becomes the same speed as the belt 15. The feed roller 5 and the pick-up roller 3 are gear-coupled so as to have the same rotation direction and the same peripheral speed. Further, the plunger 30 swings the paper feed roller shaft 7 via the lever 29 to move the pick-up roller 3 up and down.

Next, the operation of the above configuration will be described in order.

The sheet original 2 is placed on the entrance tray 1, and the sheet original is inserted between the pick-up roller 3 and the paper feed roller 4. Then, the document presence / absence sensor 11 senses the sheet document, and after a certain time, the plunger 30 is energized and the pick-up roller 3 descends, and the document is sandwiched between the pick-up roller 3 and the paper feed roller 4 (when there is no sheet document, the pick-up roller 3 is inserted). Roller 3 is lifted up). At the same time, the motor 43 rotates, and the clutch 35 is also energized to rotate the drive roller 13. In this state, the plunger 27 is not energized and the spring clutch (not shown)
Due to this, the pulley 25 (large) is stationary and the sheet original is not conveyed. When the motor 43 rotates and a certain time elapses, the plunger 30 is energized so that the clutch pawl 28 moves to the control ring 26.
As the drive roller shaft 14 rotates further, the feed roller shaft 10 rotates.
And the feed roller 5 and the pick-up roller 3 rotate. At this time, the sheet original 2 starts to be conveyed. Then, when the leading edge of the sheet original 2 passes between the feed roller 5 and the second paper feed roller 6, the leading edge of the sheet original 2 is detected by the leading edge detection sensor, and from this time, the photo interrupter 39 causes the clock disc 38 to move. Start counting the number of clocks. Next, the sheet original 2 enters between the entire surface belt 15 and the original platen glass 47, and the leading end of the sheet original 2 is pressed by the pressing roller 1.
When it comes below 6, the conveyance force of the full-face belt 15 increases, the sheet original 2 becomes the same speed as the peripheral speed of the full-face belt 15, becomes faster than the peripheral speed of the feed roller 5, and the feed roller follows the sheet original 2. When the trailing edge of the sheet original 2 is detected by the paper presence / absence sensor 22, the plunger 30 is de-energized and the pick-up roller 3 goes up. Further, the trailing edge of the sheet original 2 is detected by the leading edge detection sensor 12, and the electricity to the plunger 27 is cut off.
And the rotation of the pick-up roller 3 is stopped. This is because the next sheet document will not be accepted.

In the motor 43, the leading edge of the paper is detected by the leading edge detection sensor 12, and when the photo interrupter 39 counts a certain number of clocks, the energization is cut off. At the same time, the clutch 35 is de-energized and the brake 36 is energized. Stops instantly. As a result, the rotation of the drive roller shaft 14 and the movement of the entire surface belt 15 are instantaneously stopped, and the sheet original 2
Stops at a predetermined position on the document platen 47. The power supply to the brake 36 is cut off after a certain period of time. And immediately,
A copy start signal is sent to the copying machine body to start copying, and exposure of the copying machine body starts.

Then, the motor 43 is rotated by the main body copy end signal,
When the clutch 35 is energized, the front surface belt 15 starts to discharge the sheet original 2, and the discharge rollers 20 and 50 and the discharge roller 2
The document is held between 1 and 51, and the sheet document 2 is discharged onto the paper discharge tray 61. When the next document is detected by the document presence / absence sensor 11, the discharge detection sensor 22 detects the leading edge of the sheet document 2 and energizes the plunger 27 to feed the sheet document in the same procedure.

Further, the drive of the paper discharge unit is transmitted from the gear 48 fixed to the turn roller 19 to the gear 46 via the idler gear 45. The gear 46 is fixed to the discharge roller shaft 20a, and the shaft 20a and the gear 46 rotate integrally. Further, a pulley 20b is fixed to the discharge roller shaft 20a, and the pulley 5 is fixed to the shaft 52 by a belt 49.
The rotational force is transmitted to 2a.

As described above, while the full-face belt 15 is being driven, the discharge rollers 21 and 51 of the paper discharge unit obtain the driving force.

Next, in addition to the above-mentioned devices, in recent years, in copying machines, various new functions have been incorporated and multifunctional devices have been used.

One of the new functions is the multiple copy function. This is for copying a plurality of originals on one surface of one transfer sheet. For example, assume that there are two originals, one original has an image in a certain portion, and the other original has an image in another portion. First, copy one image on the transfer paper, and then copy the other image on the same side of the transfer paper.
The two original images are copied on the same side of one transfer sheet, and the multiple copy is completed.

Such copying can be performed by a conventional copying machine. That is, the transfer sheet discharged from the apparatus after the completion of the copying of the first sheet is made to correspond to the copying of the second sheet, and may be fed into the copying apparatus again by using the manual feeding mechanism or the like. On the other hand, in recent copying machines, if multiple copying is selected on the operation panel, the transfer paper automatically circulates in the copying machine, and multiple copying can be performed by replacing a plurality of originals. Further, by arranging a plurality of originals (for example, two originals) on the original placing table of the copying apparatus, it becomes possible to automatically perform multiplex copying by selecting multiplex copying without replacing the originals. ing.

Another new function is the multicolor copying function.
This is a color (eg red,
(For example, blue) phenomenon device is used, which makes it possible to obtain a color copy image. As a method, there is also a method of replacing the black phenomenon device in the copying machine with the color phenomenon device, but in a recent copying device, a plurality of color phenomenon devices other than the black phenomenon device are stored in advance in the device. Then, if color copy is selected on the operation panel, a color image can be automatically obtained.

By combining the multi-copy function described above and the multi-color copy function, it is possible to further increase the number of functions. In this case, when multiple copy and color copy are selected, colored images of a plurality of originals can be automatically obtained on the same surface of one transfer sheet. Depending on the selection method, an image of a certain original document may be black and an image of another original document may be colored to obtain a multi-color image.

Another new function is the area designation function. In this method, only an image of a necessary area is extracted from one original image and copied. As a method, first, a desired image area is measured in X and Y dimensions, and when the values are input on an operation panel, a light emitting element array provided in the vicinity of a photoconductor that forms an image according to the signal, There is a method of partially and time-sequentially emitting light to erase an electrostatic latent image in an unnecessary area on a photoconductor, thereby obtaining a necessary area image.

Recently, area designation has also been performed by a coordinate position detecting element (so-called digitizer). When this is used, it is convenient because if a required image area is pressed on the original on the digitizer, the required area is automatically detected and there is no need to perform the above-mentioned necessary area measurement work.

By combining the multiple copying function, the multicolor copying function, and the area designating function described above, more multifunctional functions can be achieved. In the case of the above-mentioned multiple copy, a plurality of originals have different image portions, and when performing multiple copy, it was necessary to select an original that does not cause overlapping of copy images. With the addition of the designation function, the image area that causes the overlap can be erased, and the need for selecting the document is eliminated. Therefore, by combining these three functions, it is possible to obtain a multiplex, multicolor image from any document.

Of course, it is easy to obtain the necessary area image by erasing the unnecessary area image on the original as described above.

FIG. 6 shows an example of a copying machine having a digitizer and a document feeder, and its operation procedure will be described below.

First, the operator places the desired original 11 on the digitizer 101.
2 is placed with the image side facing upward and the right end of the document abutting against the document abutting (not shown), and the back side of the document 112 (the back side of the paper surface) abutting against the abutting not shown. To do. Next, the stylus pen 113 is used to input a desired area on the document surface. Various input methods or detection methods of the digitizer have been proposed heretofore, and therefore will not be described in detail here. When the input work is completed, the operator selects the function keys 114 ₁ , 114 ₂ ... 1
At 14 _n , a desired mode is set by selecting a color area or the like while displaying the image of the designated area. The digitizer 101 and the function key 114 ₁ , ...
The signal input by 114 _n is transmitted to the copying machine main body by the signal line 115.

Next, the operator places the original 112 at a predetermined position (not shown) on the entrance tray 1 of the original conveying apparatus installed on the upper surface of the copying apparatus main body with the image surface facing downward. The operation of the document feeder is the same as that described above, and will be omitted. By performing the above operations, the operator can copy only the desired copy image, that is, the image in the designated area, erase the image in the designated area, or color the image in the designated area. You will get a copy as you instruct.

[Problems to be solved by the invention]

The above is a trend toward multifunctionality in recent copying machines. However, even copying machines having these functions are still very inconvenient in their usage. It looks like this:

In the conventional copying apparatus, the digitizer is placed at a location on the apparatus or a location outside the apparatus that does not hinder the copying work. Furthermore, since the digitizer has a size larger than the size of a manuscript that can be copied by at least the copying apparatus in which the digitizer is used, it is customary that space is restricted.

In particular, when the digitizer is installed outside the device, the operator has to follow many work procedures.

Specifically, since there is an abutting standard of the original in the digitizer and an abutting standard of the original in the copying apparatus main body, it is a troublesome judgment for the operating side. Furthermore, particularly when an area is specified incorrectly and the area is specified again, the work is doubled, which is very inconvenient.

Further, when the above-mentioned device is used, when the copy of the original sent on the original placing surface of the machine body is completed, the original is discharged to the surface of the digitizer. Since it is necessary to place a manuscript on top of it and digitize it, it is usual to select a manuscript having a large friction coefficient with respect to the manuscript (paper) and not slipping. For this reason, a document that has been copied and ejected onto the surface of the digitizer is subject to resistance on the surface, so the document is not ejected smoothly, and in the worst case, the document is not ejected completely and is stored inside the device. There is a risk of staying in and becoming a jam. Also,
Even if the document is completely discharged onto the surface of the digitizer, it is difficult to load the document on the surface of the digitizer in an orderly manner due to the above-mentioned resistance force received from the surface material of the digitizer.

In addition, the temperature of the copy-finished document is high due to the radiant heat from the halogen lamp of the optical system on the document placement surface of the machine body. It is recalled that the surface of the digitizer is heated by the heat from the original when it is discharged. This is especially serious when a large number of originals are set and a so-called ADF for sending one by one and a digitizer are provided side by side. In this case, many heated originals are stacked on the surface of the digitizer. There is concern about the operation of the digitizer due to the temperature rise on the surface of the digitizer or damage to the electrodes provided on the back surface of the digitizer.

In addition, it is expected that fine paper dust generated when the original is fed for a long time is accumulated on the surface of the digitizer, which becomes an obstacle when the digitizer is used and leads to malfunction of the digitizer.

In addition to the above, the conventional device has the following problems.

In other words, since the digitizer has a structure in which an insulating sheet is covered on a pair of electrode plates as already known, when the document is repeatedly discharged onto the surface of the digitizer, the edge of the document is erased. As a result, this sheet may be damaged, and in the worst case, the inner electrode plate may be exposed, which is a safety issue.

Further, since this sheet is an insulating sheet as described above, it is easily charged by rubbing against the original when ejecting the original,
This electrification may prevent the smooth discharge of the document.

[Object of the Invention]

The present invention has been invented in order to solve the above-mentioned problems, to achieve multi-functionality, to provide a copying apparatus which has a small number of working procedures and is easy to use.

[Means for solving problems]

In order to achieve the above-mentioned object, an automatic document feeder according to the present invention is provided above a reading position, a coordinate position detecting device for achieving an area instruction, and a feeding means for feeding the area-instructed original document to the reading position. A discharge unit that discharges the read document to the coordinate position detecting device, and a protection unit that is provided on the upper part of the coordinate position detecting device so as to be openable and closable and that protects the coordinate position detecting device. It is characterized in that the protective member also serves as a storage base for the discharged originals.

〔Example〕

 The present invention will be described below based on the illustrated embodiments.

FIG. 5 is a sectional view showing one embodiment of an automatic document feeder with a digitizer of the present invention. The same components as those in FIG. 9 are designated by the same reference numerals and their repeated description is omitted. To do.

A document presence / absence sensor 11 detects the presence / absence of a sheet document. A leading edge detection sensor 12 detects the leading edge of the sheet document. Reference numeral 101 denotes a digitizer, which is the above-mentioned device in which an original is placed face up and the area of the original is input to the main body by means of a stylus pen or the like. Reference numeral 102 is an abutting reference when a document is set.

Now, an embodiment of the driving unit of the present invention will be described below, but since it is almost the same as that of FIG.

An explanation of the operation when the automatic document feeder with a digitizer according to the present invention is used as an automatic document feeder is shown in FIG.
This is the same as in FIG.

However, the motor 43 is rotated by the main body copy end signal, the clutch 35 is energized, the entire surface belt 15 starts to discharge the sheet original 2, and the original is gripped between the discharge rollers 20 and 50 and the discharge rollers 21 and 51, and the sheet is discharged. The document 2 is discharged onto the automatic document feeder.

Next, the operation for designating an area using this apparatus will be described.

First, the operator opens the cover 106 of the apparatus, makes the image surface of the desired original 112 on the digitizer 101 face up, and brings the right end of the original into contact with the original abutting 102. The (back side of the paper) is placed in contact with an abutting pad (not shown). Next, a stylus pen (not shown) is used to input a desired area on the document surface.
Since various proposals have been made in the past regarding the input method or detection method of the digitizer, they will not be described in detail here. When the input work is completed, the operator uses a function key (not shown) to set a mode such as displaying an image of the designated area. Next, when the original 112 is turned upside down and the side contacting the original abutting 102 is the leading end, the original 112 is inserted between the pick-up 3 and the paper feed roller 4 from above the entrance tray 1 and the original 112 is automatically original as described above. A desired copy is obtained such that the image is conveyed to the platen glass, the copy operation is started, and only the image in the designated area is copied, or conversely, only the image in the designated area is erased.

Next, an automatic document feeder with a digitizer provided with a second document inlet near the upper surface of the digitizer, which is the object of the present invention, will be described.

In FIG. 7, reference numeral 111 is an original carry-in entrance for carrying in the original 112 whose area has been designated by the digitizer, and 103 is an original presence / absence detection sensor provided near the original carry-in entrance.

Reference numerals 104 and 104 'are roller pairs for conveying the original document, and 105 and 105' are guide plates for guiding the original document onto the platen glass.

An embodiment of these drive units is shown in FIG.

Here, 107 is a pulley fixed to the motor shaft 43b, 110 is an electromagnetic clutch for turning ON / OFF the rotation of the roller 14, and a pulley 108 is fixed to the input side of the electromagnetic clutch 110. And the pulley 10
A rubber belt 109 is stretched between 7 and 108 with a predetermined tension to transmit the driving force of the motor 43 to the electromagnetic clutch 4. A roller 104 is fixed to the output side of the electromagnetic clutch.

Next, the operation of this device will be described.

As described above, the desired area on the original is input by the digitizer, the mode is set, and then the original is fed into the original inlet 111.
, The original presence / absence sensor 103 senses the original, the motor 43 rotates after a certain period of time, and the clutch 35 is energized so that the drive roller 13 is driven. Rotate. In this state, the plunger 27 and the electromagnetic clutch 110 are not energized, and the pulley 25 is driven by the spring clutch (not shown).
(Large) is stationary, and sheet documents are not conveyed.

After a certain period of time, the electromagnetic clutch 110 is energized,
The roller 104 rotates, and the original 112 starts to be conveyed.
Then, the original 112 is fed along the guide plates 105, 105 ', and when the leading edge of the original is detected by the leading edge detection sensor, the photo interrupter 39 starts the clock disc 3 from this time.
Start counting 8 clocks. Next, the original 112 enters between the entire surface belt 15 and the original platen glass 47 and is conveyed.

In the motor 43, when the front end of the paper is detected by the front end detection sensor 12 and the photo interrupter 39 counts a certain number of clocks, the energization is cut off. At the same time, the clutch 35 is deenergized and the brake 36 is energized. Stops instantly. As a result, the rotation of the drive roller shaft 14 and the movement of the entire surface belt 15 are instantaneously stopped, and the sheet original 2
Stops at a predetermined position on the document platen 47. The power supply to the brake 36 is cut off after a certain period of time. And immediately,
A copy start signal is sent to the copying machine body to start copying, and exposure of the copying machine body starts.

Then, the motor 43 is rotated by the main body copy end signal,
When the clutch 35 is energized, the full-face belt 15 starts discharging the sheet original 112, the original is held between the discharge rollers 20 and 50 and the discharge rollers 21 and 51, and the sheet original 2 is discharged onto the cover 106. When the next document is detected by the document presence sensor 11, the discharge detection sensor 22
After the leading edge of the sheet original 112 is detected, the plunger 27 is energized and the sheet original is fed in the same procedure.

The subsequent driving of the paper discharge unit is the same as that in the above-mentioned case, and is omitted here.

As described above, the digitizer is provided on the upper surface of the conventional automatic document feeder, and the first conveying means for feeding the original from the entrance tray 1 onto the original platen glass and the U-turn of the original 112 from the vicinity of the upper surface of the digitizer. By providing the second conveyance progress and the feed roller pair (104, 104 ′) for feeding to the middle of the first conveyance means by using the digitizer with the automatic document feeder of the present invention, the followings are listed. Benefits are obtained.

First of all, if this device is used, the advantage of the conventional automatic document feeder that the complicated sheet document is placed on the platen and the pressure plate is closed to press the start key in the normal sheet copy operation is eliminated. You can get it.

Second, this device has a coordinate position detector (digitizer).
Since it is equipped with, the complicated coordinate input work using the numeric keypad, which has been done conventionally, can be done with a simple work using a stylus pen.

Thirdly, in the configuration described with reference to FIG. 10, the manuscript once designated as the area must be turned over and moved onto the entrance tray 1 while preventing the operator from making a mistake in the direction of the manuscript. According to the embodiment of the present invention shown in FIG. 7, the roller pair 10 in which the original 112 is inserted into the original carry-in port 111 after the desired area is input on the digitizer 101.
The original 112 is fed onto the original platen glass by the above-mentioned operation by merely bringing it into contact with 4, 104 'to obtain a desired copy. Further, according to this configuration, not only is the work of turning the document over and moving it to the entrance tray 1, but also by moving the document, the document is erroneously placed on the reference side in the left-right direction and the back direction of the document. There is no longer any risk of accidental copying.

Fourth, the original feeding device and the digitizer are integrally configured with respect to the main body of the copying apparatus, so that the apparatus is not restricted in space and the operator is not restricted in space and can be easily operated. You can eliminate any operational mistakes.

In the above description, a so-called DF (Document Feeder) of a type that feeds the originals one by one as an automatic document feeder has been described as an example of a type in which a digitizer is provided, but a large number of originals are set and one sheet is set. Even if a so-called ADF (automatic equipment feeder) for sending one sheet and a digitizer are provided together, it is clear that the essence, ideas, effects, etc. of the invention described in detail in the present invention can be realized.

1 to 3 show an embodiment of the present invention, in which 106 is an original receiving tray according to the present invention, and 107 and 108 are original receiving trays 1 fixedly attached to an automatic sheet original handling apparatus 301.
A rotation support unit 06, and 109 is a sheet document automatic handling device 30.
1 is a protrusion projecting from a part of the document No. 1 and 106a is a document receiving tray 106
The claw part that forms a part of the claw part 1 when the cradle is closed.
06a engages with the protrusion 109 of the automatic sheet document handling apparatus. Reference numeral 106b is a protrusion forming a part of the document receiving tray 106, and 110 is a micro switch arranged inside the sheet original automatic handling apparatus 301, which detects the open / close state of the document receiving tray.

In the above structure, first, when copying is performed using a digitizer, the document tray 106 is opened as shown in FIG. At this time, as shown in FIG. 3, the projection 106b of the document receiving tray 106 pushes the micro switch 110, and the pressing signal from this micro switch is input to the microprocessor unit (hereinafter MPU) of the copying machine main body 302. In this state, even if a document is inserted into the lower conveyance port 112 (see FIG. 7) of the automatic document feeder 301 and the document presence sensor 11 (see FIG. 7) detects the document, the MPU sends a power-on signal to the plunger 30. Is not emitted,
Documents are not automatically fed. Here, the document is placed on the digitizer, and the desired area on the document is input and the mode is set as described above.
(Fig.) And the document is automatically fed. Then, if the document receiving tray 106 is closed during the copying operation, the document is automatically discharged onto the document receiving tray 106.

Next, when performing copying without using a digitizer, the document receiving tray 106 is closed as shown in FIG. 2, and the claw portion 106a of the document receiving tray 106 is automatically fed by the automatic document feeder 301.
Engage with the protrusion. After that, the original may be inserted into the lower original feeding port 112, the mode may be set, and the normal copy operation may be started.

It is preferable to select, as the above-mentioned document tray 106 according to the present invention, one having a small friction coefficient with respect to the document and a small coordinate charging, and its shape is, for example, as shown in FIG. An attempt is made to provide a slanted surface 106c on a part of the document tray 106 to improve the placement of the document. Similarly, as shown in FIG. 2 (b), ribs may be provided on the surface of the document receiving tray 106 to improve the mounting property, thereby reducing the contact area with the document and improving the sliding property. Further, in order to prevent the digitizer from being adversely affected by heat from the heated document during the copying operation, it is preferable that the material of the document receiving tray 106 is excellent in heat insulating property.

As described above, according to the present invention, since the document receiving table is arranged on the surface of the digitizer, the document discharged from the automatic document feeder has the resistance force from the surface material of the digitizer and the friction of the surface material. The original is smoothly discharged without being affected by the electrostatic attraction force due to the charging, and the placement of the discharged originals is improved even when processing a large number of originals. In particular, as the document tray according to the present invention, the material and the shape thereof can be arbitrarily selected in order to improve the mountability, so that it can be said that the apparatus has a wide application range and high practicality. Further, since the original tray is rotatably arranged as described above, when the digitizer is used, it can be retracted to a position that does not fit in a jammer.
Operability is also good.

Furthermore, even if a document whose temperature has risen due to radiant heat from the halogen lamp of the optical system is discharged, the document is not placed directly on the digitizer surface, and the material of the document tray is a material with excellent heat insulation. The digitizer can be selected so that the digitizer is not adversely affected by the heat of the document such as the operation or the damage of the electrodes. Further, since the document receiving tray is arranged so as to cover the surface of the digitizer, it is possible to protect the digitizer from damages of the digitizer due to an unexpected impact and fluidity due to dust such as paper dust.

〔The invention's effect〕

The automatic document feeder according to the present invention is configured as described above, and includes an openable / closable protective member that protects the coordinate position detecting device, and this protective member also serves as a stacking table. There is an effect that the document can be protected and the document can be discharged smoothly.

[Brief description of drawings]

1 to 2 (a) and (b) are perspective views of the device according to the present invention, FIG. 3 is a sectional view showing a part of the device according to the present invention, and FIG. 4 is intended for the present invention. FIG. 5, FIG. 7, FIG. 9 are cross-sectional views of the apparatus, FIG. 6 and FIG. 8 are schematic views for explaining the drive section of the apparatus, and FIG. It is a perspective view which shows the apparatus structure of the conventional digitizer. Reference numeral 101 is a digitizer, 301 is an automatic document feeder with a digitizer, 302 is a copying machine main body, 106 is an original receiving tray, 106a is a claw portion which is a part of the original receiving tray 106, 1
Reference numeral 06b denotes a projection which forms a part of the document tray 106, and 106c.
Reference numeral 109 denotes a slope structure portion forming a part of the document receiving tray 106, and reference numeral 109 denotes a protrusion fixed to a part of the automatic document feeder with a digitizer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Kubota 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Toshihiko Kusumoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Tatsuya Shiratori 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takashi Ozawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Yasuyoshi Yamamoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Masashi Ohashi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Akiyoshi Kimura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-57-204066 (JP, A) JP-A-52-534 30 (JP, A)

Claims (3)

[Claims] 1. A coordinate position detecting device which is provided above a reading position and which achieves an area instruction, a feeding means for feeding an area-specified document to a reading position, and a read document to the coordinate position detecting device. An ejector means for ejecting and a protector provided on the coordinate position detecting device so as to be openable and closable to protect the coordinate position detecting device. Automatic document feeder that doubles as a function. 2. The automatic document feeder according to claim 1, wherein the document contact surface side of the protective member has an uneven shape parallel to the sheet discharge direction. 3. The automatic document feeder according to claim 1, wherein a part of the protection member is a surface having a slope.