JP6860848B2 - Sheet transfer device, image reader, and image formation system - Google Patents

Description

The present invention relates to a sheet transfer device, an image reading device, and an image forming system.

Conventionally, a sheet transporting device that transports a sheet on a sheet mounting table or a sheet inserted from a sheet receiving location different from this sheet mounting table to a specific work position and then transports the sheet to a paper ejection area different from the sheet mounting table. It has been known.
For example, Patent Document 1 describes such a sheet transporting device in which the paper ejection region is set below the sheet mounting table.

However, if the paper ejection area is set below the sheet mounting table, there is a problem that when the sheet ejected in the paper ejection area is taken out, the sheet mounting table located above becomes an obstacle and it is difficult to take out.

In order to solve the above-mentioned problems, the present invention is different from the sheet mounting table after transporting the sheet on the sheet mounting table or the received sheet from a sheet receiving position different from the sheet mounting table to a specific work position. In a sheet transport device for transporting to a paper ejection region, a plurality of sheets on the sheet mounting table are separated and transported, passed through the specific work position, and discharged to the paper ejection region or the sheet receiving portion. Means, control means for controlling the transport means, selection designation means for selectively designating a paper ejection destination between the paper ejection area and the sheet receiving portion, and paper ejection from the sheet receiving portion. When a removal detecting means for detecting the removal of a sheet is provided and a plurality of sheets on the sheet mounting table are separated and conveyed, when the sheet receiving portion is selected by the selection designation means, the above. The control means is configured so that the transfer of the second and subsequent sheets from the sheet mounting table is started by the removal detection by the removal detection means .

By setting the sheet receiving location so that the sheet mounting table does not get in the way when taking out the sheet ejected here, the sheet can be ejected to a place where the sheet mounting table does not get in the way. Can be done.

The perspective view of the image formation system which concerns on one example. The schematic block diagram of the image reader of the image formation system. Top view of the image reader. An enlarged schematic block diagram of a part of the image reader. A perspective view of a part of the image reader. Flow chart of control of reference example. Flowchart of other control of the same reference example. The flow chart of the control of Example 1. The flowchart of another control of the same Example 1. The flow chart of the control of Example 2. Another control flowchart of the second embodiment.

Hereinafter, an embodiment in which the present invention is applied to an image forming system including an image reading device and an image forming device will be described.
FIG. 1 is a perspective view of an image forming system according to an example. The copying machine 1 as an image forming system is mainly composed of an image forming unit 3, an image reading unit 4, and an automatic document transporting device (hereinafter, also simply referred to as “automatic document transporting device”) 5 as a transporting unit. Has been done. The image reading device 6 is composed of the image reading unit 4 and the automatic document transporting device 5.

(1) Image-creating part (image-forming part)
The image forming unit 3 includes, for example, an exposure unit, a plurality of photoconductor drums, a developing device using four color toners of cyan (C), magenta (M), yellow (Y), and black (K), and a transfer belt. , A secondary transfer unit, a fixing unit, and the like. Based on the image read by the image reader 6 or the print data transmitted from an external device such as a PC, the image forming unit 3 exposes the photoconductor drums of each color by, for example, an exposure unit and statically mounts them on the photoconductor drums. An electro-latent image is formed, and toner is supplied onto the latent image of each photoconductor drum in a developing unit of each color of a developing device to develop the image. Further, the image forming unit 3 first transfers the toner image on the photoconductor drum of each color to the transfer belt, superimposes the toner image on the recording paper at the secondary transfer unit, and then performs the secondary transfer, and then transfers the toner image on the recording paper by the fixing unit. It can be heated and pressed to fix it to form a color image. Instead of the electrophotographic image forming unit 3 as described above, an image forming unit that employs another recording method such as an inkjet method may be used.

(2) Description of Reading Unit (i) Overall Reading Unit FIG. 2 is a schematic configuration diagram of an image reading device of the image forming system. The image scanning device 6 has a DF scanner mode (conveyed document reading mode) that reads a document image during automatic transport and a flatbed scanner mode (placed document reading mode) that reads an image of a document placed on a flat contact glass. ) And can be switched.
In the flatbed scanner mode, the image reading unit 4 irradiates an image surface of a document (for example, a document sheet, cardboard, a book, etc.) on the flatbed contact glass 41 with light, and transmits the reflected light from the image surface to an image signal. The original image can be read by converting to.

Further, in the DF scanner mode, the automatic document transporting device 5 separates the document sheets one by one from the document sheet bundle loaded on the document table 51, which is the sheet mounting table, and carries the document sheets into the document transport path 52. It is transported along the transport path 52. Then, during the transport, the document sheet is sequentially and partially faced with the DF contact glass 42 on the upper surface side of the image reading unit 4 from the upstream side portion in the transport direction. That is, the image reading device 6 can exhibit the function of the DF scanner by sequentially reading the images on the document sheet transported by the automatic document transporting device 5 on the DF contact glass 42 of the image reading unit 4. ing.

The automatic document transporting device 5 is attached to the rear portion (rear surface side portion) of the device main body 1M on the upper surface side via an opening / closing mechanism such as a hinge. Then, the automatic document transfer device 5 can take an open position in which the flatbed contact glass 41 is opened with respect to the apparatus main body 1M and a closed position in which the document on the flatbed contact glass 41 can be pressed. There is.

(Ii) Document table (multi-tray)
FIG. 3 is a plan view of the image reading device 6. The document table 51 is equipped with a pair of left and right movable side guide plates 54 that position the document sheet S set in the automatic document transport device 5 in the sheet width direction orthogonal to the paper feeding direction. These side guide plates 54 can be relatively approached and separated so that the centers of the document table 51 and the document sheet S in the width direction coincide with each other. However, the side guide plate 54 may be arranged so that one edge of the document sheet S is brought into contact with one edge of the document table 51 and only the other edge is movable.

As shown in FIG. 2, the automatic document transporting device 5 is covered with a cover 55 that can open and close at least above the automatic document transporting device 5. The cover 55 forms a paper feed port 55a above the vicinity of the paper feed side end of the document table 51 so that the tip of the document sheet S enters the cover. Further, the cover 55 covers the upper part of the tip portion of the document table 51 so that the tip portion of the document table 51 is housed inside the paper feed port 55a. Further, in the automatic document transport device 5, the main guide portion forming the transport passage of the document transport path 52 from the paper feed port 55a to the discharge port 56 is formed by ribs or the like formed on the cover 55 or the like.

(Iii) Reading unit (configuration, operation)
The flatbed contact glass 41 is a case where the image reading device 6 functions as a flatbed scanner, and when a document sheet to be read is placed, the image surface of the document sheet (hereinafter, also referred to as a first document). It is designed to face. Further, the DF contact glass 42 faces the image surface of a document sheet (hereinafter, also referred to as a second document) that passes through a predetermined reading position of the document transport path 52 when the image reading device 6 functions as a DF scanner. It has become like. Further, the DF contact glass 42 is inclined so as to form a preset inclination angle with respect to the flatbed contact glass 41.

Inside the image reading unit 4, a first reading unit 45 (reading unit) and a guide rod 46 extending in the left-right direction in FIG. 2 are provided.
The first reading unit 45 is a plurality of compression coils incorporated in a compressed state between the integrated optical scanning unit 47, the bracket 48 holding the integrated optical scanning unit 47, and the integrated optical scanning unit 47 and the bracket 48. It is composed of a spring 49 (elastic member).

The integrated optical scanning unit 47 is configured as a close contact image sensor in which, for example, a mold frame holds a roof mirror lens array of 1x imaging elements, an optical path separation mirror, a 1x image sensor, an illumination light source, and the like. The integrated optical scanning unit 47 is configured to have a large depth of focus capable of line-scanning an image with high resolution in the main scanning direction and capable of reading an image such as a book document. The integrated optical scanning unit 47 is not limited to a specific method as long as it has a configuration compatible with a DF scanner and a flatbed scanner. The main scanning direction is parallel to both the upper surface of the flatbed contact glass 41 and the upper surface of the DF contact glass 42.

The integrated optical scanning unit 47 is also movably guided in the sub-scanning direction by a guide rod 46 arranged on the lower side of the bracket 48. Then, depending on the position in the sub-scanning direction, the integrated optical scanning unit 47 slidably contacts one or both of the flatbed contact glass 41 and the DF contact glass 42 at the upper portion thereof. As a result, although the first reading unit 45 is movable along the guide rod 46, the inclination of the guide rod 46 around the axis is restricted.

The first scanning unit 45 can read the image of the original by line-scanning the image surface of the original on the flatbed contact glass 41 in the main scanning direction and moving in the sub-scanning direction. Further, the first scanning unit 45 can read the image of the original by line-scanning the image of the conveyed document passing over the DF contact glass 42 in the main scanning direction.

Inside the image reading unit 4, a timing belt is provided in an endless loop shape in which the bracket 48 of the first reading unit 45 is fixed at one position in the circumferential direction thereof. Further, inside the image reading unit 4, a plurality of timing pulleys on which timing belts are hung without slack, a motor for rotationally driving any one of the timing pulleys, and the like are provided.

When performing the reading operation in the flatbed scanner mode, the first reading unit 45 moves from the home position to one side in the sub-scanning direction, for example, from the home position near the stop position shown by the solid line in FIG. Move to. Then, line scanning is performed by the integrated optical scanning unit 47 for each minute movement distance, and an image of the front surface (lower surface) of the mounted document on the flatbed contact glass 41 is read. When the reading operation is completed, the first reading unit 45 returns to the home position again.

When performing the reading operation in the DF scanner mode, the first reading unit 45 moves below the DF contact glass 42 from the home position as shown by a solid line in FIG. That is, the first scanning unit 45 moves to the other side in the sub-scanning direction by a preset distance from the home position, stops below the DF contact glass 42, and passes over the DF contact glass 42 on the surface of the conveyed document. Read the image.

The first reading unit 45 is thus movable in the sub-scanning direction so that it can be located on the lower side of the flatbed contact glass 41 and the lower side of the DF contact glass 42. Then, the integrated optical scanning unit 47 has a horizontal first reading posture in which an image can be read through the flatbed contact glass 41 and an inclined second position in which an image can be read through the DF contact glass 42, depending on the position in the sub-scanning direction. The posture changes to the reading posture.

The automatic document transporting device 5 stacks a document table 51 as a document mounting table on which a standard sheet can be placed, a document transport path 52 for transporting the document sheet so that the image can be read, and a document sheet after image reading. It is provided with a paper tray 53. The document table 51 and the output tray 53 are arranged one above the other so that at least a part of them is separated from each other for the purpose of miniaturization.

(Iv) DF scan (U-turn transport)
The automatic document transfer device 5 serves as a rotating member that separates the top-level document sheets S one by one from the sheet bundle placed on the document table 51 and carries them into the document transfer path 52 that is folded back so that it can be reverse-conveyed. It has a pickup roller 52a and a separation unit (including a separation roller 52b). Further, the automatic document transfer device 5 inverts the separated / carried-in document sheet S so as to be folded back, and passes the predetermined reading operation position Pd1 (specific work position) on the upper surface of the separated / carried-in document sheet S along the DF contact glass 42. , The document sheet S is transported through the document transport path 52. The document transport path 52 has a plurality of transport rollers 52c (pull-up rollers) and 52d (reading inlet rollers) for such transport, and the paper ejection roller vs. 52e (reading outlet roller) is located downstream of the plurality of transport rollers 52c (pull-up rollers) and 52d (reading inlet rollers). It has 52f (pair of paper ejection rollers) and 52f (pair of paper ejection rollers). The number and location of the rollers for transporting and discharging the paper can be arbitrarily set according to the route setting conditions of the document transport path 52, the length of the minimum size of the document sheet S in the document transport direction, and the like. Is.

When the integrated optical scanning unit 47 is located at the solid line position in FIG. 2, the first scanning unit 45 repeatedly performs line scanning of the image of the document sheet S being conveyed by the integrated optical scanning unit 47 at the scanning operation position Pd1. , The original image can be read. Then, the original sheet S after reading the image is discharged to the paper ejection tray 53 by the paper ejection rollers 52e and 52f.

The pickup roller 52a, the separation unit (including the separation roller 52b), the plurality of transfer rollers 52c and 52d, and the paper output roller pairs 52e and 52f transmit a plurality of sensors arranged on the document transfer path 52 and their detection information. A transport means is configured together with a controller that executes transport control based on the controller. In this transporting means, the original sheet S is carried in from above the original table 51, and the original sheet S is folded back and conveyed so as to pass through the reading operation position Pd1 on the output tray 53, which is a paper ejection area outside the original table 51. Paper is ejected in the stack area of.

FIG. 4 is an enlarged schematic configuration diagram of a part of the image reading device 6. The plurality of sensors are, for example, a document set sensor 100, a post-feed sensor 101, a reading inlet sensor (resist sensor) 102, a manual feed document set sensor 103, and the like, and these sensors are from the upstream side in the transport direction of the document sheet S. They are arranged in order on the downstream side. The ordinary document sheet S is a PPC or other sheet that is easily bent, and can form an image recording surface.

The document transport path 52 is a straight extending along the DF contact glass 42 in a predetermined transport section on the downstream side from the nip position of the transport rollers 52c and 52d on the upstream side of the DF contact glass 42 to the discharge port 56. It constitutes the main part of the transport path 61.

(V) DF scan (straight transfer)
The upper surface of the manual feed tray composed of the open / close cover 5a taken in the open position shown by the virtual line in FIG. 2, or the sheet manually inserted from the card insertion slot 5b formed in the open / close cover 5a in the closed state, or the like. , A straight transport path for straight transport is formed.
FIG. 5 is a perspective view of a part of the image reading device, and FIG. 5A shows a state in which the tip of the card C is inserted and deviated from the insertion port 5b in a state where the opening / closing cover 5a is closed. 5 (b) to 5 (d) show a state in which the opening / closing cover 5a is opened. A side guide pair 5c that can be relatively approached and separated from each other is provided on the upper surface so as to align the centers in the width direction. FIG. 5B shows a state in which the side guide pair 5c is relatively narrow, FIG. 5C shows a state in which the side guide pair 5c is most widened, and FIG. 5D shows a state in which the sheet S is set.

A hard sheet having a higher bending rigidity than the normal document sheet S, particularly a small-sized hard sheet, is conveyed along a plane inclined so as to be parallel to the upper surface of the DF contact glass 42. Further, when the hard sheet is conveyed in the straight transfer path, the hard sheet passes through a predetermined reading operation position Pd1 on the DF contact glass 42.

The small-sized hard sheet H referred to here is a standard standard-sized card made of resin or the like (thick paper may be used), for example, a driver's license, an ID card (identification card), a transportation card, or the like. Therefore, the small size here means, for example, one of ISO / IEC 7810 ID-1, ID-2, or ID-3, which is an international standard that defines the shape of an identification card, or a card equivalent thereto. The size. However, the width of the card size in the lateral direction is set to be smaller than the width in the lateral direction of the smallest size cut sheet among the standard cut sheet sizes set on the document table 51.

The plurality of transport rollers 52d, 52e, 52f of the straight transport path constitute a straight transport means together with a plurality of sensors 102, 103 arranged on the straight transport path and a controller that executes transport control based on the detection information thereof. ing. The sheet inserted from the insertion slot 5b or the open / close cover 5a in the open state has a path of the sheet conveyed from the document table 51 near the entrance of the reading inlet roller vs. 52d before reaching the DF contact glass 42. Meet. That is, the vicinity of the entrance of the reading inlet roller pair 52d is the merging point Pd0.

The straight transport path is the same along the inclination angle of the DF contact glass 42 in the range from the insertion port 5b or the open / close cover 5a in the open state to the DF contact glass 42 as the DF contact glass 42 is inclined downward. It is located on a plane.

(Explanation of U-turn transport operation)
In the above configuration, when reading the image of the original S, the original S is set on the original table 51 and the start button 200 (see FIG. 1) provided on the operation panel is pressed, as shown in FIG. The document is fed out to the document transport path 52 in order from the highest document S. Then, the document S is conveyed from the paper feed port 55a in a U-turn so as to be folded back along the U-turn conveying path P1 indicated by the alternate long and short dash line in the figure, and reaches the reading inlet roller pair 52d. After that, when the document S passes through the upper surface of the DF contact glass 42, the image of one surface (for example, the surface) is read by the first reading unit 45.
Further, when reading the image on the other side (for example, the back side) of the document S, the image on the other side is read by the second reading device 69 when the document S passes through the second reading device 69.
Then, the document S after reading the image on the other side (for example, the back side) is discharged from the discharge port 56 toward the paper output tray 53 by the reading outlet roller pair 52e and the paper ejection roller pair 52f. That is, the upper surface area of the paper ejection tray 53 becomes the paper ejection region.

(Operation explanation of straight transfer)
On the other hand, the straight transfer route from the manual feed is a document smaller than the minimum size document (for example, postcard size) set in the document table 51, particularly a thick resin such as a cash card of a bank or various credit cards. Cards can be transported (delivered). The adjacent spacing of each roller pair is arranged to be equal to or smaller than the vertical size (or horizontal size) of the card C. When reading an image of the card C or the like by manual feeding, first, the opening / closing cover 5a is opened and the sheet is set on the upper surface thereof, or the card is inserted from the insertion slot 5b. In this state, when the start button 200 is pressed, the ball is fed to the straight transport path.
Then, when passing through the upper surface of the DF contact glass 42, the image of one surface (for example, the surface) is read by the first reading unit 45. Further, when reading the image of the other surface (for example, the back surface), the image of the other surface is read by the second reading device 69 when passing through the second reading device 69. Then, the card C or the like after reading the image on the other side (for example, the back side) is discharged from the discharge port 56 toward the paper discharge tray 53 by the paper discharge roller pair 52f or the like.

Since there are two document tables and the like for setting documents (51, 5b, 5a), the operation when the documents are set in both is performed as follows.
1. 1. When a bundle of documents is set on the document table during document transfer from the second document table The paper feed operation (pickup roller 52a and separation roller 52b) can be stopped by the electromagnetic clutch, and only manual feed transfer is possible. Is done.
2. When reading an image while transporting a bundle of documents set on the document table (first document table 51) During operation (having a paper feed mechanism and separating the bundle of documents) When the original is set on the opening / closing cover (second original table) 5a of manual feeding (for example, the original is being conveyed), the original may be carried by the reading inlet roller 52d and the originals may come into contact with each other. As a countermeasure, when the original is normally transferred (the original is being conveyed from the first original table 51) and the original is set on the opening / closing cover 5a as the manual feed table which is the second original table, the above-mentioned manual manual set sensor 103 is turned on. , The drive of the roller is stopped, and as a document jam, the transfer of the document transferred from the first document table 51 is controlled to be stopped.

Next, the feature portion of the present embodiment will be described. It can be said that the automatic document transfer device (5) according to the above embodiment has the following configuration. That is, the first document table (51), the detecting means (100) for detecting that the document is set on the first document table, and at least one sheet that is set on the first document table can be bent. A first paper feeding means (52a, 52b) for feeding papers one by one, a bent first transport path (55a to Pd0) adjacent to each other in the downstream direction of the first document table, and a second document. The table (5a, 5b), the detection means (103) for detecting that the original is set on the second original table, and the first non-bendable single original to be set on the second original table are fed. The paper feeding means (52d), the second transport path (manual feed to Pd0) that is adjacent to the second document table in the downstream direction and substantially parallel to the second document table, and the first transport path and the first. An image of a third transport path (nip of Pd0 to 52f) that is substantially parallel to the second transport path and is straight with the two transport paths merging, and one side of the document transported in the third transport path. A first image reading means (47) for reading an image, and a second image reading means (69) for reading an image of the other side of the surface to be read by the first image reading means of a document conveyed in a third transfer path. , A configuration having a third transport path and an adjacent output tray (53).

In the above configuration, if the output tray (53) is positioned below the first document table (51), it becomes difficult to take out the sheets ejected from the output tray. Therefore, in the present embodiment, after the original is read by the image reading means (47, 69), the original is switched back and conveyed to be controlled so as to be ejected to the second original table (5a, 5b). This increases the number of output ports selected by the user. Therefore, it is easy to pick up the output paper even if it is set on either the first or second paper table while keeping the equipment inexpensive (small number of parts) and small compared to the automatic paper transport device & scanner. Since it is performed by the DF that switches back, it is possible to prevent the machine from becoming large.

Before explaining this characteristic control, a reference example of a normal control will be described for comparison.
FIG. 6 is a flow chart of control of this reference example, which is a flowchart of reading a document set in the first document table (51) and discharging the original to the output tray (53).
First, the following processing is performed in step 1. The paper feed clutch that switches between the connection state and cutoff state of the motor drive transmission to the pickup roller 52a and the separation roller 52b is turned off (cut off), this motor is also turned off (stopped), and the image readers (47, 69) are also turned off. (Stop), the post-feed sensor (101) is also OFF (non-detection), the document detection sensor (100) of the document table 51, which is the first document detection sensor, is also OFF (non-detection), and the second document detection sensor The manual feed document set sensor (103) of a certain manual paper feed tape is also turned off (not detected), the resist sensor (102) is also turned off (not detected), and the next document flag is set to FALSE (none). This next document flag indicates whether or not the next document is set in the first document table (51), and if the presence of the document is detected (ON) by the first document detection sensor (100), TRUE (yes). If the original is not detected by the sensor 1, it is set to (OFF) and FALSE (none).

Next, when the user sets the document in the first paper feed port (first document table 51) in step 2, the first document detection sensor turns ON (detects) in step 3. Then, when the start instruction is given by the user in step 4 by pressing the start button 200 (see FIG. 1), the motor is turned on (driven) in the forward direction in step 5, and the first paper feed clutch is turned on (connected) in step 6. ), And wait for the sensor (101) to turn ON (detect) after feeding in step 7. When the tip of the document reaches and the sensor (101) turns on after feeding, the first paper feed clutch is turned off (disengaged) in step 8. As a result, the rotation of the pickup roller 52a and the separation roller 52b is stopped, and only the pull-up roller 52c and the like downstream in the transport direction continue to rotate, and the resist sensor (102) is waited to be turned on in step 9. When the tip of the document reaches and the resist sensor is turned on, the number of pulses corresponding to the time required for the tip of the document to move from the position of the resist sensor to the position read by the image reader (Pd1) is counted in step 10, and the counting is completed. Then, in step 11, the image reading device (47, 69) is turned ON (reading).

Then, in step 12 or step 19, the document passes through the resist sensor (102) and waits for the sensor to be turned off. During this time, after the document passes through the post-feed sensor (101) in step 13 and the sensor is turned off, if the first document detection sensor (100) is turned on in step 14, the next document flag is set to TRUE in step 15. ), And in step 16, the first paper feed clutch is turned on (connected). On the contrary, when the first document detection sensor (100) is turned off in step 14, the next document flag is set to FALSE (none) in step 17, and the first paper feed clutch is turned off (disengaged) in step 18.

Then, when the document passes through the resist sensor (102) and the sensor is turned off in step 12 or step 19, the rear end of the document moves from the resist sensor to the reading position (Pd1) by the image reader in step 20. The number of pulses corresponding to the time required for the above is counted, and when the counting is completed, the image reading device is turned off (stopped) in step 21.

Then, the next manuscript flag is confirmed in step 22, and if this is TRUE (yes), the process returns to step 7. If it is FALSE (none), the number of pulses corresponding to the time required for the rear end of the document to move from the reading position (Pd1) of the image reader to the paper ejection roller (56) plus the surplus in step 23 is calculated. Counting is performed, and when the counting is completed, the motor is turned off (stopped) in step 24, and the reading completion is completed at the end. The scanned documents are stacked in the first output tray.

FIG. 7 is a flowchart of another control of the above reference example, which is a flowchart of reading the original set in the second document table (5b, 5a) and discharging the original to the output tray (53).
The numbers of steps 1 to 24 are the same for the same steps as in FIG. 6, and there are differences depending on whether the original set is the first original table or the second original table. Subscripts such as "a" and "b" are added to the step numbers of the steps. In step 2a, the place where the document is set by the user is different and the second document table is used, and accordingly, the second document detection sensor (103) for detecting the document in step 3a is different. Then, in the second document set, when the document is detected in step 3a, prefeed is performed as step 3b. This prefeed is performed by turning on the reading inlet roller 52d in the forward direction only for a predetermined time. After prefeeding, the motor is turned off.

There are no steps corresponding to steps 6, 7 and 8 in FIG. Manual feeding in this device is performed one by one, and unlike the one in which multiple sheets are set and the paper is fed separately from the top one, the second document table is for the pickup roller and its ON / OFF. This is because it does not have a clutch. For the same reason, the steps 13 to 19 in FIG. 6 and the step 22 are not provided. Other steps are the same as in FIG.

As described above, in the control of the comparative example of FIGS. 6 and 7, the conveyed originals are ejected to the output tray directly under the first original table regardless of whether the originals are fed from the first or second original table. Become. Therefore, the smaller the height of the DF, the smaller the space between the first document table and the output tray (paper ejection space), and the more difficult it is to eject the ejected documents. In addition, the first document table can be set up to increase the space for ejecting paper, but when transporting documents, it is necessary to lower it and return it to the normal position, which is troublesome because the user's operation turn increases. Exists.

Therefore, in the present embodiment, after the rear end of the document has passed through the second reading device 69, the transport direction is switched back in the opposite direction, and the document is discharged to the second document table (5b, 5a).
FIG. 8 is a flow chart of control of the first embodiment, in which a document set in the first document table (51) is read and selected on the output tray (53) or the second document table (5b). It is a flowchart which discharges a paper.
Steps 1 to 20, steps 20 and 21 are the same steps as in FIG. 6 of the comparative example and are assigned the same step numbers. However, the "second output port flag" is additionally used and added to the initialization target of step 1. This second output port flag is a flag indicating whether or not the second document table (5a, 5b) is selected and specified instead of the output tray 53 as the output destination, and is an operation panel as a selection specifying means. When the selection key 201 (see FIG. 1) is pressed to select and specify the output to the second table, it is turned ON (with the selection of the second table) (steps 3c and 3d in FIG. 9), and step 1 It is turned off (without selecting the second table) by the initialization of.

When the image reading device is turned off (stopped) by proceeding to steps 1 to 21 in the same manner as in the control of FIG. 6 of the comparative example, any paper ejection destination is referred to in step 30 with reference to the above-mentioned "second paper ejection port flag". Make sure that is selected. The document at this stage is in a state in which the rear end of the document has passed the document reading position in steps 20 and 21, and the scanning device is also stopped.

As a result of checking the "second output port flag" in step 30, if the "second output port flag" is ON (with the second table selected), the motor is reversed in step 32. The switchback transfer of the original is started, and the original reaches the manual feed document detection sensor (103) and passes through the resist sensor (102) in steps 33 to 35, and further, the surplus count is counted in step 36. After completion, the motor is stopped in step 37. Then, in step 38, it is confirmed whether or not the first document detection sensor (100) is ON, and if it is ON, TRUE is recorded in step 39, and if it is OFF, FALSE (without) is recorded in step 40. In step 41, the user waits for the user to remove the output original from the second original table (5a). When it is removed and the second document detection sensor (103) is turned OFF (non-detection) in step 42, the next document flag is taken into consideration, and if there is a next document, the process returns to step 5. That is, when there is a next original, if the output original is removed from the second original table (5a), the process returns to step 5, and even if the user in step 4 does not instruct the reading start, the motor is rotated ON. The scanning operation of the next original after the first sheet is started. On the contrary, if the next document is not available, the scanning operation is terminated. The second document detection sensor 103 is used to configure a paper ejection sheet removal detection means.

As a result of checking the "second output port flag" in step 30, when the "second output port flag" is OFF (no second table is selected), the same as in the comparative example of FIG. Perform the steps in. Specifically, steps 22 to 24 after step 21 in FIG. 6 are executed to end the process, or steps 22 to 7 are returned to steps 8 to 22 if there is no next manuscript in step 22. Repeat until confirmed.

FIG. 9 is a flowchart of another control of the first embodiment, in which a document set in the second document table (5a) is read, and the output tray (53) or the second document table (5a) is selected depending on the selection. ) Is a flowchart to be discharged.
The numbers of steps 1 to 37 are the same for the same steps as in FIG. 8, and there are differences depending on whether the original set is the first original table or the second original table. Subscripts such as "a" and "b" are added to the step numbers of the steps. The same relationship as for FIG. 6 of FIG. 7 in the above comparative example is established between FIGS. 9 and 8. That is, the steps corresponding to steps 6, 7, and 8 of FIG. 6 in step 31 of FIG. 8 do not exist in step 31a of FIG. Further, the steps 13 to 19 and the step 22 of FIG. 9 in step 31 of FIG. 8 do not exist in step 31a of FIG.

Further, also in FIG. 9, if the "second output port flag" is ON (with the second table selected) as a result of checking the "second output port flag" in step 30, step 32 The motor is reversed to start the switchback transfer of the original, and in steps 33 to 35, the original reaches the manual feed document detection sensor (103) and passes through the resist sensor (102), and further, in step 36. After completing the counting of the surplus in step 37, the motor is stopped in step 37. Then, the reading operation is terminated.

As a result of checking the "second output port flag" in the above step 30, when the above "second output port flag" is OFF (no second table is selected), the same as the comparative example of FIG. Perform the steps in. Specifically, steps 23 to 24 after step 21 in FIG. 7 are executed to end the process.

As described above, the control of the first embodiment has the following advantages. That is, since the second document table is manually fed by one sheet, the second document table may not have the next document after the paper is fed. Therefore, it is possible to switch back regardless of whether the paper is fed from the first or second document table, and the section from the second document table to the paper ejection roller 52f is a straight transfer capable of reading to thick resin cards. Since it is a route, it can be ejected to the second document table. Unlike normal operation, the output original can be taken out from the second original table, and since this second original table is located on the left side of the DF, there are no obstacles on the upper part, so a large space for ejecting paper is taken. be able to.

For paper feeding from the first document table, a large number of documents are fed one by one. Therefore, when a plurality of originals are set on the first original table, the previous original is discharged to the second original table, and the subsequent originals remain on the first original table. The paper feed port with the second document table is a one-sheet manual paper feeding method, and even when the second document table is used as the paper ejection port, the next document cannot be ejected to the same place unless the previous document is removed. The user will remove the previous document, but by turning off the second document detection sensor when removing the previous document, the user can save the trouble of pressing the start again, so the user operation turn can be reduced. Can be done.

As described above, since the paper feed port of the second document table is a one-sheet manual feed method, the user abuts the document against the reading inlet roller so that the tip of the document is parallel to the roller. Although skew is suppressed when setting the original, it is difficult to hit the tip of the original against the roller because the paper feed port is located on the side of the DF, and the original is inserted diagonally against the roller. It's easy to get rid of. If it is pre-fed as it is, it will lead to skew.
Therefore, in the control according to the second embodiment of the present embodiment, the roller (for example, the reading outlet roller 52e or the paper ejection roller 52f) in the straight transport path is driven to the roller without performing the image reading before the switchback. Skew correction is performed by stopping the drive of the roller with a clutch means such as an electromagnetic clutch that connects and cuts off transmission, and the tip of the document is abutted against the roller, and the skew is improved by scanning the image at the end. .. Since it is performed by the DF that switches back, it prevents the machine from becoming large.
Although there is a DF that has conventionally performed skew correction by abutting the tip of a document against a roller, it has been performed before the bending transfer path because it must be performed before scanning. Therefore, the conventional machine cannot eliminate the skew generated by the bending transport path.

FIG. 10 is a flow chart of control of the second embodiment, in which a document set in the first document table (51) is read and selected on the output tray (53) or the second document table (5b). It is a flowchart which discharges a paper.
Steps 1 to 9 are the same steps as in FIG. 8 of the first embodiment and are assigned the same step numbers. However, the "butt roller clutch" is additionally used and added to the initialization target of step 1. This abutting roller clutch is a clutch that switches the transmission cutoff (connection state and cutoff state) of the rotational driving force of the abutting roller as the abutting means used for skew correction of a document. As the abutting roller, in this example, a reading outlet roller pair 52e is used as a pair of rotating members that hold and convey the sheet material.

When the tip of the document reaches the resist sensor (102) and the sensor is turned on in step 9, the document waits for the document to pass through the resist sensor (102) while calculating parameters B in steps 50, 51, and 52. This parameter B counts the length of the document passing through the resist sensor in the transport direction. After passing, in step 53, the number of pulses corresponding to the time when the rear end of the document moves from the resist sensor to the reading outlet roller (butt roller) 52f plus the surplus A is counted, and when the counting is completed, step 54 Turns off the abutting roller clutch. Then, the reverse rotation of the motor is turned on (driven) in step 55, and the number of pulses corresponding to the surplus A in step 53 plus the abutting portion for skew correction is counted. As a result, the rear end of the document transported by the paper ejection roller 52f, which functions as a forward / reverse transport means capable of reversing the transport direction, is abutted against the abutt roller to correct the skew. Then, in step 57, the abutting roller clutch is turned on (transmitted), the abutting roller is also reversed, and the rear end of the document is switched back first. In step 58, the number of pulses corresponding to the time required for the rear end of the document to move from the abutting roller to the reading position (Pd1) of the scanning device is counted, and when the counting is completed, the image reading device is turned on (reading) in step 11. To.

Next, as in FIG. 8, the process proceeds to steps 12, 20', and 21 to turn off (stop) reading. However, in this step 20', the reading stop timing is determined by using the parameter B corresponding to the length of the document measured in steps 50 to 52 described above. Specifically, the length obtained by subtracting the distance between the resist sensor and the scanning position from the document length of parameter B, that is, the number of pulses corresponding to the length of the unread portion of the document existing after the scanning position is counted. Then, when the count is completed, the reading is turned off (stopped). After turning off (stopping) reading in this way, it is confirmed in step 30 which output destination is selected by referring to the second output port flag. Here, when the "second output port flag" is ON (with the second table selected), the same steps as in FIG. 8 are obtained from step 33 to step 43 thereafter. The reason why there is no step corresponding to step 32 in FIG. 8 is that the motor has been turned on (driven) in reverse in step 55 so far.

As a result of checking the second output port flag in step 30, when the second output port flag is OFF (the second table is not selected), the steps are basically the same as those in the comparative example of FIG. However, since the motor has been turned on (driven) in reverse in step 55 up to this point, the point where the motor is switched to normal rotation for ejecting paper toward the output tray and the case where there is a next document are returned. The steps are different. Specifically, the next manuscript flag is confirmed in step 22, and if this is TRUE (yes), the process returns to step 5. In the case of FALSE (none), after turning on (driving) the motor in the forward direction in step 59, the rear end of the document moves from the reading position (Pd1) of the image reader to the paper ejection roller (56) in step 23. The number of pulses corresponding to the required time plus the surplus is counted, and when the counting is completed, the motor is turned off (stopped) in step 24, and the reading completion is completed at the end. The scanned documents are stacked in the first output tray.

FIG. 11 is a flowchart of another control of the second embodiment, in which a document set in the second document table (5a) is read, and the output tray (53) or the second document table (5a) is selected depending on the selection. ) Is a flowchart to be discharged.
The numbers of steps 1 to 37 are the same for the same steps as in FIG. 10, and there are differences depending on whether the original set is the first original table or the second original table. Subscripts such as "a" and "b" are added to the step numbers of the steps.

Also in FIG. 11, when the tip of the document reaches the resist sensor (102) and the sensor is turned on in step 9, the document presses the resist sensor (102) while calculating parameters B in steps 50, 51, 52. Wait for it to pass, and after passing, in step 53, count the number of pulses corresponding to the time it takes for the rear end of the document to move from the resist sensor to the reading outlet roller (butt roller) 52f plus the surplus A. When the counting is completed, the abutting roller clutch is turned off (disengaged) in step 54. Then, the reverse rotation of the motor is turned on (driven) in step 55, and the number of pulses corresponding to the surplus A in step 53 plus the abutting portion for skew correction is counted. As a result, the rear end of the document is abutted against the abutting roller to correct the skew. Then, in step 57, the abutting roller clutch is turned on (transmitted), the abutting roller is also reversed, and the rear end of the document is switched back first. In step 58, the number of pulses corresponding to the time required for the rear end of the document to move from the abutting roller to the reading position (Pd1) of the scanning device is counted, and when the counting is completed, the image reading device is turned on (reading) in step 11. To.

Then, as in FIG. 10, the process proceeds to steps 12, 20', and 21 to turn off (stop) reading. After the reading is turned off (stopped), it is confirmed in step 30 which output destination is selected by referring to the second output port flag. Here, when the "second output port flag" is ON (with the second table selected), the same steps as in FIG. 9 are followed from step 33 to step 37. The reason why there is no step corresponding to step 32 in FIG. 9 is that the motor has been turned on (driven) in reverse in step 55 so far.

As a result of checking the second output port flag in step 30, when the second output port flag is OFF (no selection of the second table), basically the same step as the comparative example of FIG. 7 is performed. However, since the motor has been turned on (driven) in reverse in step 55 up to this point, the difference is that the motor is switched to forward in order to eject paper toward the output tray. Specifically, after turning on (driving) the motor in the forward direction in step 59a, the time required for the rear end of the document to move from the reading position (Pd1) of the image reader to the paper ejection roller (56) in step 23. The number of pulses corresponding to the sum of the surplus is counted, and when the counting is completed, the motor is turned off (stopped) in step 24, and the reading is completed at the end. The scanned documents are stacked in the first output tray.

1: Copier 1M: Device body 3: Image forming unit 4: Image reading unit 5: Automatic document transporting device 5a: Opening / closing cover 5b: Insertion port 5c: Side guide pair 6: Image reading device 41: Flatbed contact glass 42: DF contact glass 45: 1st reading unit 46: Guide rod 47: Integrated optical scanning unit 48: Bracket 49: Compression coil spring 50: Step 51: Original table 52: Original transfer path 52a: Pickup roller 52b: Separation roller 52c: Transport roller 52d: Reading inlet roller 52e: Paper ejection roller pair 52f: Paper ejection roller 53: Paper ejection tray 54: Side guide plate 55: Cover 55a: Paper feed port 56: Discharge port 61: Straight transport path 69: Second reading Device 100: Document set sensor 101: Post-feed sensor 103: Manual feed document set sensor 200: Start button 201: Selection key Pd0: Confluence point Pd1: Reading operation position

Japanese Unexamined Patent Publication No. 2016-88645

Claims (8)

In a sheet transporting device that transports a sheet on a sheet mounting table or a sheet received from a sheet receiving location different from this sheet mounting table to a specific work position and then transports the sheet to a paper ejection area different from the sheet mounting table.
A transporting means for separating and transporting a plurality of sheets on the sheet mounting table, passing through the specific work position, and discharging paper to the paper ejection region or the sheet receiving portion.
A control means for controlling the transport means and
A selection designation means for selectively designating a paper ejection destination between the paper ejection area and the sheet receiving portion, and
A removal detecting means for detecting the removal of the output sheet from the sheet receiving place is provided.
When a plurality of sheets on the sheet mounting table are separated and conveyed, when the sheet receiving location is selected by the selection designating means, the removal detection by the removal detecting means causes the sheet mounting table to be removed from the sheet mounting table. A sheet transport device characterized in that the control means is configured so as to start transporting the second and subsequent sheets of the sheet. In the sheet conveying apparatus 請Motomeko 1,
Along with forming a transport path so that a confluence point is formed so that the transport path from the sheet mounting table to the specific work position and the transport path from the sheet receiving portion to the specific work position meet.
After being transported from the sheet mounting table or the sheet receiving location and the rear end passing through the confluence, the direction of the transport is reversed so that the sheet can be transported from the rear end toward the sheet receiving location. A sheet transfer device characterized by. In a sheet transporting device that transports a sheet on a sheet mounting table or a sheet received from a sheet receiving location different from this sheet mounting table to a specific work position and then transports the sheet to a paper ejection area different from the sheet mounting table.
By selecting the sheet transported so as to pass through the specific work position, the sheet can be discharged to the sheet receiving location.
Along with forming a transport path so that a confluence point is formed so that the transport path from the sheet mounting table to the specific work position and the transport path from the sheet receiving portion to the specific work position meet.
After being transported from the sheet mounting table or the sheet receiving portion and the rear end has passed through the merging portion, the direction of transport is reversed so that the sheet can be transported from the rear end toward the sheet receiving portion.
A sheet conveying device characterized in that a butt means for skew correction is provided on a conveying path between the merging point and the paper ejection region. In the sheet transport device of claim 3,
A transporting means for separating and transporting a plurality of sheets on the sheet mounting table, passing through the specific work position, and discharging paper to the paper ejection region or the sheet receiving portion.
A control means for controlling the transport means and
A selection designation means for selectively designating a paper ejection destination between the paper ejection area and the sheet receiving portion, and
A removal detecting means for detecting the removal of the output sheet from the sheet receiving place is provided.
When a plurality of sheets on the sheet mounting table are separated and conveyed, when the sheet receiving location is selected by the selection designating means, the removal detection by the removal detecting means causes the sheet mounting table to be removed from the sheet mounting table. A sheet transport device characterized in that the control means is configured so as to start transporting the second and subsequent sheets of the sheet. In the sheet transport device of claim 3 or 4,
The abutting means is provided on the paper ejection region side of the specific work position, and the forward / reverse conveying means capable of reversing the conveying direction is provided on the paper ejection region side of the abutting means. A featured sheet transfer device. In the sheet transport device according to any one of claims 3 to 5,
A clutch means for switching the connection disconnection of transmission of the rotational driving force to a pair of rotating members that hold and convey the seat is provided, and the abutting means is provided by the rotating member whose rotational driving force is interrupted by the clutch means. A sheet transfer device characterized by being configured. An image reading device comprising the sheet transporting device according to any one of claims 1 to 6 and an image reading means provided at the specific working position. In the image forming system ing from an image reading apparatus and an image forming apparatus,
An image forming system characterized in that the image reading device according to claim 7 is used as the image reading device.

Images