JPS62272244A - Automatic original carrying device - Google Patents

Abstract

PURPOSE:To remove malfunction due to the failure of a coordinate position detecting device and to surely prevent the generation of troubles of operation by controlling the working state/non-working state of an original carrying means based on a signal for detecting the existence of a cover. CONSTITUTION:If an operation button is depressed when a digitizer 42 is still covered with the cover 60 after the end of the preceding copying operation, an original Pa on a tray 23 is sent, copied and discharged on the cover 60. When an original Pb is positioned on the digitizer by a regulation plate 65a and covered with the cover 60, a switch 62 is turned on and copying operation is started. Therefore, the device is driven only the closed state of the cover 60 without turning on the switch in error at the opened state of the cover 60, discharging the original whose temperature is raised by the radiation heat of an exposing light source to the surface of the digitizer and damaging the original and the generation of original jam due to the failure of receding of the regulating plate 65a can be prevented. Thus, the troubles of operation can be surely removed.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an automatic document feeder, and more specifically, to an automatic document feeder, and more specifically, to an automatic document feeder, and more specifically, to an automatic document feeder for use in copying devices, recording devices, etc., which have an image area designation function. The present invention relates to an automatic document feeder that is used in a forming apparatus and is equipped with a digitizer (coordinate position detection device) for reading an area of a document image.

(b) Conventional technology In the past, in copying machines, originals were manually placed on the original platen, but many sheet originals were placed one by one on the original platen. Because it was inefficient to use the original document tray, automatic document feeders were installed that automatically fed sheet documents to the document table and automatically ejected them. In addition, the copying device has a multiple copying function that copies multiple originals on the same side of one sheet of transfer material, and uses a color (for example, red, blue, etc.) developing device instead of the usual black developing type. Some devices are designed to be multifunctional by having a multicolor copying function to obtain a copy image and an area specifying function (or a coordinate position detection device). In other words, the above area specification function is
It extracts and copies only the image of the necessary area from one original image. First, the desired image area is measured in X and Y dimensions, and the values are input on the operation panel. According to the signal, A light emitting element array installed near the photoreceptor that forms the image emits light partially and in chronological order, erasing the electrostatic latent image on the unnecessary area on the photoreceptor, thereby obtaining an image of the necessary area. That is what it is.

Furthermore, there is a method of specifying an area using a digitizer (coordinate position detection device). If you use this method, you can place a document on the digitizer, press the desired image area from above the document, and the area will be automatically specified. is detected, and the above-mentioned measurement work of the required area is not required.

Furthermore, by combining the multiple copying function, multicolor copying function, and area designation function described above, further multifunctionality can be achieved. In the case of multiple copies mentioned above, each document had a different part of the image, and it was necessary to select the document to avoid overlapping duplicate images. As a result, image areas that cause overlap can be erased, eliminating the need to select documents. Therefore, by combining these three functions, multiplex and multicolor images can be obtained from any document. Of course, as described above, it is easy to erase unnecessary area images from a document and obtain necessary area images.

Hereinafter, a conventional copying apparatus having the above-mentioned area designation function and equipped with an automatic document feeder will be described.

As shown in FIG. 6, this copying apparatus has an automatic document feeder 2 on the upper part of the apparatus main body M, and also includes an area indicating device 3 configured separately from the copying apparatus main body M. In the area indicating device 3, a digitizer 6 is installed on the digitizer installation stand 6, and a stylus pen 7 is also provided, and the document P is placed on the digitizer 6 with the image surface facing upward. , the right end is placed in contact with a document abutment (not shown), and the back side is placed in contact with a document abutment (not shown).Next, the stylus pen 7 is used to move the document to a desired area on the image surface of the original fi P. is pressed to specify and input the area. Various input methods or detection methods have been proposed, but will not be described in detail.
When a desired area is input, a desired mode such as displaying an image of the inputted desired area or specifying a color is selected using the crayon key 9, and the digitizer 6 and the funk'n mole The signal inputted at the above-9 is transmitted to the main body M of the copying machine via the signal link 10.

Then, the original [P is a copy bag
The document 1 is placed on the automatic document feeder 2 located at the top of the main body M, and is transferred onto the document 11, with its image surface facing downward, and with the right end that has come into contact with the document abutment on the digitizer 6 first. The document is moved on the document tray 11 and inserted to a predetermined abutment position of the automatic document feeder 2. Then, the automatic document feeder 2 operates to feed the document P to the image forming section of the copying apparatus main body M, and the copying apparatus M performs a predetermined copying operation.

However, since the above-mentioned conventional copying apparatus M has a separate area indicating device 3, an extra installation space is required for the area indicating device 3. Furthermore, since the area instruction value M3 is configured separately, the operator must perform many work steps. That is, there is a reference for the document to hit against the digitizer 6, and a reference for the document to hit for the automatic document feeder 2. The original g4P must be accurately abutted against the abutting reference of the automatic document feeder 2, and the image surface of the original g4P must also be changed from upward to downward and transferred onto the document tray 11, which is troublesome for the operator. Moreover, especially when a mistake is made in specifying an area and the area is to be specified again, the work is doubled, which is extremely inconvenient.

Therefore, the present applicant has devised an automatic document feeder that integrates a digitizer.

An automatic document feeder devised by the applicant will be described below.

The automatic document feeder 20 devised by the applicant is as follows:
As shown in FIG. 5, a copying machine M having an area specification function
placed at the top of the Then, the automatic document feeder 20
The copying machine M has a full-surface belt 22 approximately in the center facing the platen glass 21 of the copying machine M, and is provided with an entrance tray 23 on which sheet originals are stacked in 21 parts. A feed roller shaft 25 is provided near the tray 23, and a feed roller 26 is fixed to the shaft 25 and rotates together with the feed roller shaft 25. Further, a paper feed arm 27 is rotatably supported at one end of the feed roller shaft 25, and a pickup roller 29 is rotatably supported at the other end of the paper feed arm 27. The pickup roller 29 swings up and down integrally with the paper feed arm 27 with the feed roller shaft 25 as a fulcrum. The rotation of the feed roller 26 is transmitted to the big roller roller 29 via a gear (not shown), and the feed roller 26 and the pickup roller 29 are configured so that the rotation direction and roller circumferential speed are the same. There is.

Further, a front paper feed roller 30 is rotatably provided facing the pickup roller 29, and a rear paper feed roller 31 is rotatably provided facing the feed roller 26.

Further, a pickup arm 33 having one end fixed to a pickup arm shaft 32 is provided near the paper feed arm 27, and a slide 1933a is formed at the other end of the pickup arm 33. A pin 27a protruding from the paper feed arm 27 is fitted into the slide groove 33a, and when the pickup arm shaft 32 rotates, the pickup arm 33 swings.
As the paper feed roller 3 swings, the pickup roller 29 swings up and down, and comes into pressure contact with or separates from the front paper feed roller 30. Then, the pickup roller 29 is connected to the front paper feed roller 30.
When pressed against the rollers 29 and 30, the sheet original held between the rollers 29 and 30 is fed. In addition, the pickup roller 2
A document presence/absence sensor S1, which is a reflective sensor, is provided near 9. On the other hand, a drive roller 35 and a turn roller 36 are provided above both ends of the platen glass 21, respectively.
The belt 22 is wound around both rollers 35 and 36. The full-surface belt 22 is an endless belt with a width large enough to cover the entire surface of the sheet document, and its surface is made of rubber-based material with a sufficient coefficient of friction so that the document can be conveyed with a stick. coated with material. In addition, the turn roller 36
can move left and right, and the entire surface belt 22
When the belt 22 is wrapped around the belt 22, it is biased to the left, and the entire belt 22 has sufficient tension to prevent slipping between the belt 22 and the drive roller 35. Furthermore, presser rollers 37a, 37b, 37c are provided inside the entire belt 22.
... are provided, and these presser feet: +o37a, 37
b and 37c are arranged at a pitch much narrower than the size of the sheet document to be conveyed, and furthermore, these presser rollers 37a, 37b, and 37c press the entire belt 22 against the platen glass 21 with a weak pressure. As a result, the sheet document conveying force of the full-surface belt 22 is increased. In addition, a pair of lower discharge rollers 39 and a pair of upper discharge rollers 40 are disposed near the turn roller 36 that winds the entire surface PEL) 22, and a discharge detection sensor is disposed adjacent to the pair of lower discharge rollers 39 S2 is arranged to detect the discharge of a sheet original, and to turn on a jam lamp if the original sheet is not detected even after a predetermined period of time has elapsed. Further, a pair of curved discharge document guides 4 is provided between the pair of upper and lower discharge rollers 39 and 40.
1 is provided to guide the document from the lower discharge roller pair 39 to the upper discharge roller pair 40. Furthermore,
A digitizer 42 is arranged above the entire surface belt 22, and the digitizer 42 uses a stylus pen or other means to specify and input the area of the sheet document placed with the image side facing upward as described above. . In addition, the digitizer 4
A document abutment reference 43 is fixedly provided adjacent to one side end facing the drive roller 35 of No. 2, and when a sheet document is placed on the digitizer 42, the right end of the rate document is placed on the document abutment reference 43. The rear side of the sheet original is brought into contact with an abutment (not shown) to be positioned. Further, a pair of carry-in sheet guides 45 is provided from the document abutting reference 43 to the platen 21, and a pair of carry-in rollers 46 is disposed midway through the pair of carry-in sheet guides 45, and A document carrying path 47 is formed by the pair 45 . A document carry-in section sensor S is arranged facing upstream of the original entry path 47, and a leading edge detection sensor S4 is further arranged facing the lower end of the carry-in sheet guide pair 45.

Note that what is indicated by the reference numeral 49 below the platen glass 21 is an optical system of the copying apparatus M.

When simply copying using the sheet original g4P a, first place the sheet original Pa with the image side facing down on the entrance tray 23, and then transfer the sheet original Pa between the pickup roller 29 and the front paper feeder. Push it between the rollers 30. Then, the document presence sensor S1 detects the sheet document Pa, and after a certain period of time, the pickup roller 29 descends and the sheet document Pa is sandwiched between the pickup roller 29 and the front paper feed roller 30 (in a state where there is no sheet document). In this case, the pickup roller 29 is lifted upward).

At the same time, the drive roller 35 rotates, and the entire surface belt 22
rotates. Then, the pickup roller 29 rotates and starts feeding the document PaO. Then, the tip of the sheet material IJiP a is connected to the pickup roller 29.
Feed roller 26 and rear paper feed roller 31 rotate at the same time
When the sheet original 94Pa passes through the gap and reaches the leading edge detection sensor S4, the leading edge of the sheet original 94Pa is detected by the leading edge detection sensor S4, and from this time a photo interrupter (not shown) starts timing the conveyance of the sheet original Pa. Next, the sheet 1-original f14Pa enters between the full-surface belt 22 and the platen glass 21, and when its tip comes under the first presser roller 37a, the feeding force of the full-surface belt 22 increases, and the sheet The original document Pa has the same speed as the circumferential speed of the full-surface belt 22, and is faster than the peripheral speed of the feed roller 26, so that the feed roller 26 rotates with the sheet original Pa. and,
C) When the trailing edge of the document Pa is detected by the leading edge detection sensor S4, the rotation of the feed roller 26 and pick-up roller 29 is stopped, and the next sheet document is not fed. Then, at a predetermined timing determined by the photo ink printer, the full-surface belt 22 is stopped, and the sheet document Pa conveyed by the full-surface belt 22 is placed at a predetermined position on the platen glass 21. . Immediately, the exposure operation of the copying machine M is started.

Then, in response to a copy end signal from the copying device 1M, the full-surface belt 22 starts rotating, and conveyance of the sheet original ffqPa is started. The paper is guided by a pair of upper discharge rollers 41 and further pinched by a pair of upper discharge rollers 40 and discharged.

After the sheet document Pa is discharged, the full-surface belt 22 stops rotating. Note that when the document presence/absence sensor S1 is sensing the next sheet document, the discharge detection sensor S2 starts feeding the next sheet document after detecting the leading edge of the sheet document [Pa.

Next, when specifying an area using the sheet original g4Pb, place the sheet original [Pb on the digitizer 42 with the image surface facing up, and abut the right end of the sheet original against the original abutment 43, and also place the sheet original FJ% on the digitizer 42. The back side of Pb is placed in contact with an abutment (not shown). Then, a desired area on the document screen is designated and inputted using a means such as a stylus pen. After completing the input, use the not-illustrated fascination key to set the mode, such as whether to display the image of the specified area or not. Next, the sheet original pb has its leading edge that has been in contact with the original abutment 43 released from the abutment 43, and the original r
It is inserted into the inlet path 47 and abuts against the nip portion of the pair of carry-in rollers 46 . At this time, the original 1m loading section sensor S3 senses the original sb, and after a predetermined time has elapsed since the sensing by the sensor S, the drive roller 35 rotates, and the entire surface belt 2
2 rotates. After that, the carry-in roller pair 46 rotates,
The original sheet IJPb is guided by a pair of carry-in rate guides 45 and is conveyed toward the platen glass 21. Then, when the leading edge of the original sheet g4Pb is detected by the leading edge detection sensor S4, the photo ink printer starts timing the conveyance of the original sheet iPb. Then, the sheet original P
b enters between the full surface belt 22 and the platen glass 21, is transported eastward by the full surface belt 22, and is stopped and placed at a predetermined position on the platen glass 21 at a predetermined timing. Note that when the rear end of the sheet original Pb is detected by the leading edge detection sensor S4, the pair of carry-in rollers 46 stops rotating. Then, the exposure operation of the copying machine M is started. Then, in response to the copy end signal from the copying machine M, the entire surface belt 2
2 starts to rotate, and the document Pb is ejected as described above.

→ Problem to be solved by the invention By the way, the above-mentioned automatic document feeder 20 specifies and inputs the area of the sheet document [Pb on the digitizer 42, and then manually transfers the sheet document pb to the tu feeding path. However, since this work is very troublesome, an automatic document feeder that automatically feeds the sheet document from above the digitizer 42 into the conveyance path has become obsolete. If the operation switch of the main body M of the copying machine M is turned on and the automatic document feeder 20 is activated before the coordinate position input by 42 is completed, not only the coordinate position during the input operation may be incorrectly input, but also the document may be ejected. The sheet original is stacked on the digitizer 42. At this time, the sheet original loaded on the digitizer 42 is heated by radiant heat from the halogen lamp of the optical system of the copying machine main body M, and this causes the digitizer 42 to malfunction or causes HAT due to friction with the sheet original. %.

(c) Means for solving the problem The present invention aims to solve the above-mentioned problems, and includes installing a protection member detection means for detecting the presence or absence of a protection member, and detecting the presence or absence of a protection member. actuating/stopping means for controlling the document transport means based on a signal from the document transport means is installed, and when the protection member is in a position away from the coordinate position detection device, the document transport means is rendered inoperable; The present invention is characterized in that the transport means is configured to be operable when the coordinate position detecting device is located at a position covering the coordinate position detecting device.

(e) Operation Based on the above-described configuration, when the protective member is located away from the coordinate position detection device, the protective member detection means is disconnected;
As a result, the actuating/stopping means stops the document conveying means under its control, and in this state, the sheet document is rendered incapable of being conveyed.

When the protection member is moved by the operator to a position covering the coordinate position detection device, the protection member detection means is connected by the protection member, thereby causing the activation and
A stopping means releases the original TI4 transport means under its control. Therefore, the sheet document placed on the coordinate position detection device or the like is brought into a state where it can be conveyed slowly by the document conveying means.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the same parts as those of the automatic document feeder 20 described above are denoted by the same reference numerals, and a description thereof will be omitted.

As shown in FIGS. 1 and 2, the automatic document feeder 59 has a cover member 6 at one end above the digitizer 42.
0 is rotatably installed via a hinge 61, and a micro switch 62 is installed below the hinge 61 in the digitizer 42.
When the cover member 60 is rotated toward the digitizer 42 and placed on the digitizer 42, the arm portion 62a is pressed by the back surface of the cover member 60 to turn on the microswitch. It is configured. Further, a feed regulating section 63 is disposed at the other end above the digitizer 42, that is, above the drive roller 35.
A document abutting member 65 is installed rotatably around a support shaft 66, and a regulating plate 65a is provided on one side of the abutting member 65 extending in the rearward direction. Furthermore, a feed roller 67 is rotatably installed at one end of the contact member 65, and a spring 69 biases the feed roller 67 slightly toward the support shaft 66. Further, the end opposite to the feed roller 67 is supported by the plunger 0a of the solenoid 70, so that when the solenoid 70 is not excited, the abutment member 65 moves to the first position around the support shaft 66. The feed roller 67 is lifted upward by being rotated clockwise in the figure.

In this state, the lower end of the regulating plate 65a is configured to be in a position to regulate one end of the sheet original pb placed on the digitizer 42.

On the other hand, the automatic document feeder 59 includes a control section C, and the control section C is further provided with an actuation/stopping means 71. Based on the detection by the microswitch 62, the actuation/stopping means 71 causes the cover member 60 to rotate or stop once from the digitizer 42 after the previous copying operation is completed.
If they are not separated, the conveyance means such as the feed rollers 26 and 67, the drive roller 35, and the discharge rollers 39 and 40 are controlled to be operable, and the cover member 60 is moved to the digitizer 42.
When the digitizer 42 is rotated and separated from the digitizer and placed on the digitizer, the digitizer 42 is controlled to be operable together with the conveyance means.

Since this embodiment has the above-described configuration, its operation will be explained according to the flowchart shown in FIG. 3. After the previous copy operation is completed (Sl), the cover member 60 is turned It is detected whether there is an opening operation (S2). If the opening operation of the cover member 60 is not detected, that is, if the cover member 60 has not been separated from the digitizer 42 since the end of the previous copying operation, an operation switch (not shown) is operated in this state to open the next copying operation. When a copy signal is input (S3), the automatic document feeder 59 is started in the automatic document feeder mode (S4), and the sheet original f@Pa is at the entrance). It is placed at a predetermined position on the glass 21. Immediately, a copy start signal is sent to the copying apparatus main body M to start copying, and exposure of the torpedo main body M starts (S5). Then, in response to the copying operation end signal from the main body M, the entire surface belt 2
2 begins to discharge the sheet original [Pa, and the discharge roller pair 39.
40, the sheet original Pa is discharged onto the cover member 60.

Then, when the opening operation of the cover member 60 is detected, the copyster 1 and the signal receiver are kept in a state in which no signal is applied until the next closing operation is detected. Then, the operator places the sheet original Pb on the digitizer 42 and
When the desired area of 2 is pressed with a stylus pen or the like to complete the area specification input, and the cover member 60 is further rotated and placed on the digitizer 42 (S6), the back side of the cover member 60 is pressed. The arm portion 62a of the microswitch 62 is pressed, thereby turning on the microswitch 62. Further, in this state, the solenoid 70 is energized by the copy start signal (S 7 ) from the copying apparatus main body M, and the plunger 70a pulls the document abutting member 65. As a result, the corresponding contact member 65 rotates around the support shaft 66 against the biasing force of the spring 69, and as shown in FIG.
The feed roller 67 moves the sheet g4 on the digitizer 42
Press it onto Pb (S8). At this time, the original contact member 6
The regulating plate 65a of No. 5 serves as a guide plate that is retracted from the conveying path of the sheet original Pb and guides the upper part of the sheet original Pb. Therefore, in this state, the regulating plate 65a guides the upper surface of the sheet document sent by the feed roller 67, and even if the leading edge of the document pb is curled, it reliably guides the original g4 input path 47. can be sent to. Then, after a certain period of time has elapsed, the drive roller 35 is driven, and further the feed roller 67 and the pair of carry-in rollers 46 are driven. Then, the document Pb is sent to the carry-in roller pair 46 by the feed roller 67, further sent to the drive roller 35 along the carry-in sheet 1-guide pair 45, and placed on the platen glass 21 by the full-surface belt 22. reactor. Then, a copy signal is immediately sent and the copy operation is started (39). ,
! Exposure of the photographing device main body M starts. Furthermore, the main body M
When the copy end signal is received, the entire surface belt 22 moves the sheet original p.
Then, the sheet original pb is discharged onto the cover member 60 by the pair of discharge rollers 39 and 40.

In this embodiment, the microswitch 62 is operated by a cover member 60 installed in the automatic document feeder 59 so as to be openable and closable, and the feed roller 67 etc. are operated only when the cover member 60 covers the digitizer 42. As shown in FIG.
The cover member 60 is configured to press the input surface of the digitizer 42 depending on whether the protrusion 71 presses the input surface of the digitizer 42 or not.
It may be configured to detect whether or not it is located above.

(G) As described in detail, according to the present invention, there is provided a protection member detection means for detecting the presence or absence of a protection member, and an activation/stopping means for controlling the document transport means based on a signal from the detection means. The document transport means is made inoperable when the protection member is separated from the coordinate position detection device, and the document transport means is made operable when the detection device is covered with the protection member. It is possible to reliably prevent sheet originals from being ejected onto the detection device due to erroneous turning on of the operation switch while inputting data with the protection member separated from the coordinate position detection device. This prevents a sheet original whose temperature has been raised by radiant heat from a halogen lamp or the like during copying to be ejected onto the coordinate position detection device, and damages the detection device due to the heat or friction of the document. It is possible to eliminate malfunctions due to malfunctions, etc., and furthermore, the sheet original will not be ejected when the protective member obstructs the ejection path of the sheet original. - It is possible to reliably prevent document jams. Further, it is possible to reliably prevent problems such as an operator inputting incorrect information due to interference by other sheet documents sent to the coordinate position detection device during input to the coordinate position detection device.

Furthermore, based on the detection of the presence or absence of the protective member since the end of the previous image forming operation, if the protective member has never been separated from the coordinate position detecting device, the document conveying means can be activated, and the protective member can be moved away from the coordinate position detecting device. If the coordinate position detecting device is configured so that it can operate together with the document transport means when the document is separated and covered, the automatic document feeder can operate without using the coordinate position detecting device, and the document automatic document feeder can operate automatically using the coordinate position detecting device. The operation of the feeding device can be distinguished from the operation of the coordinate position detecting device, and the device can be operated only when the coordinate position detecting device is used, so that malfunction of the coordinate position detecting device can be more reliably prevented.

Furthermore, if the protective member detection means is composed of a protrusion installed on the protective member and a coordinate position detection device, the existing coordinate position detection device can be effectively used to detect the protective member simply by providing a simple protrusion on the protective member. As a result, the number of parts can be reduced and costs can be reduced.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a sectional view showing an automatic document feeder according to the present invention;
FIG. 2 is a sectional view showing the state during operation, FIG. 3 is a flow chart 1 showing the operation, FIG. 4 is a sectional view showing another embodiment, and FIG. FIG. 6 is a cross-sectional view showing the devised automatic document feeder. FIG. 6 is a perspective view showing a conventional original F14 automatic feeder. feed roller, drive roller, carry-in roller pair, feed roller), 4
2. Coordinate position detection means (digitizer), 59.
- Automatic document feeder, 60... Protective member (cover member), 62 Protective member detection means C micro switch), 71 - Activation/stopping means.

Claims (3)

[Claims] (1) A coordinate position detection device that specifies an area during image formation is provided, and a protective member that protects the detection device and serves as a document storage stand is placed at a position covering the detection device and at a position away from the detection device. An automatic document feeder is provided with a document transport means such as a feed roller and a drive roller, and is provided with a protection member detection means for detecting the presence or absence of the protection member; If an actuation/stopping means for controlling the document conveyance means is installed based on a signal from a detection means, and the protection member is located at a position away from the coordinate position detection device,
An automatic document feeder configured to make the document transport means inoperable and to enable the transport means when the protection member is in a position covering the coordinate position detection device. (2) Based on the detection of the presence or absence of the protective member from the end of the previous image forming operation by the protective member detecting means, if the protective member is not separated from the coordinate position detecting device even once, the document conveying means may be operated. , and the coordinate position detecting device is configured such that when the protective member is separated from and placed in a position covering the coordinate position detecting device, the coordinate position detecting device can operate together with the document conveying means. Automatic document feeder as described. (3) The automatic document feeder according to claim 1, wherein the protection member detection means is constituted by a protrusion installed on the protection member and a coordinate position detection device.