JP2017175293A - Reading device and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reading device capable of preventing deterioration of read image quality due to abnormality in movement of reading units.SOLUTION: A plurality of reading units is arranged side by side, and a reference member extending in a direction in which the plurality of reading units is arranged is read by an image sensor unit that optically reads a document image. On the basis of the reading result, it is determined whether an inclination occurs in the direction in which the plurality of reading units of the image sensor unit is arranged with respect to the reference member.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a reading apparatus and a control method for reading a document image.

  The image quality of the read image data may be reduced due to instability of the carriage scanning speed during reading of the document by the image reading apparatus. Patent Document 1 describes that when an abnormality in the carriage traveling state is detected, the operator is notified of the result. In Patent Document 1, an abnormality in the traveling state of the carriage is detected by detecting the angular velocity on the drive shaft of the motor.

JP 2008-160491 A

  As a driving method of the carriage, instead of driving the carriage by two driving units provided on the back side and the near side in the main scanning direction, as shown in FIG. It may be driven only by the part. In this case, since there is no driving unit on the front side of the carriage, the operation of the carriage becomes unstable on the front side, and the carriage moves in the main scanning direction from the state of FIG. 2B to the state of FIG. May be tilted. In Patent Document 1, an abnormality in the traveling state on the drive shaft can be detected, but an abnormality in the traveling state of the carriage itself as shown in FIG. 2C cannot be detected. Therefore, when there is an abnormality in the traveling state of the carriage as described above, the reading unit including the image sensor unit and the carriage is inclined, and there is a possibility that the image quality of the document is deteriorated due to uneven brightness.

  An object of the present invention is to solve such conventional problems. In view of the above-described points, an object of the present invention is to provide a reading apparatus and a control method that prevent deterioration in reading image quality due to abnormal movement of a reading unit.

  In order to solve the above-described problem, a reading apparatus according to the present invention includes a reading unit in which a plurality of reading units are arranged side by side, optically reading a document image, and a direction orthogonal to a direction in which the plurality of reading units are arranged. Based on the reading result when the reading unit reads the reference member extending in the direction in which the plurality of reading units are arranged by the reading unit, the plurality of the reading unit with respect to the reference member. Determining means for determining whether or not there is an inclination in the direction in which the reading units are arranged.

  According to the present invention, it is possible to prevent a reduction in reading image quality due to an abnormal movement of the reading unit.

It is a figure which shows the structure of an image reading apparatus and reading glass vicinity. It is a figure which shows the drive structure of a carriage. It is a figure which shows the structure of a control part. It is a figure which shows a reading control process. It is a figure which shows the detection location of the edge of Mylar. It is a figure which shows a reading control process. It is a figure which shows a reading control process. FIG. 6 is a diagram illustrating a document reading position adjustment process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments do not limit the present invention according to the claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the present invention. . The same constituent elements are denoted by the same reference numerals, and the description thereof is omitted.

[First Embodiment]
In the present embodiment, a detection operation in the case where instability occurs in the traveling state of the carriage when the carriage moves to the document reading position in the ADF scan will be described.

  FIG. 1A illustrates a configuration of the image reading apparatus. FIG. 1B is a view showing a cross section near the reading glass 5. As shown in FIG. 1 (A), the image reading apparatus 1 has an image sensor unit 4 for reading an image of a document D automatically conveyed from an ADF (Auto Document Feeder) 7 below. The reading glass 5 is disposed. Reading while conveying the image of the document D automatically conveyed from the ADF 7 is called so-called “flowing reading”. Further, the image reading apparatus 1 includes a contact glass 6 for directly placing and reading a document without using the ADF 7. At the time of flow reading, the document D conveyed at the document reading position 11 on the reading glass 5 is read. The image sensor unit 4 is a line-type image sensor in which a light receiving sensor such as a CCD and a light source such as an LED are configured in a direction (main scanning direction, line direction) intersecting (for example, orthogonal to) the document conveyance direction. . The image sensor unit 4 acquires data output by receiving light reflected from the original by each light receiving sensor as read data of the original fed from the ADF 7. The read data is stored in a RAM 302 of the control unit 300 described later. The image reading apparatus 1 optically reads an image of the document D fed from the ADF 7 by the image sensor unit 4. In addition to the above-described flow reading, the image reading apparatus 1 may optically read a document image placed on the contact glass 6 by opening the ADF 7.

  The ADF 7 includes a document tray 10 on which the document D is loaded, a pickup roller 22 that feeds the document D loaded on the document tray 10, and a separation roller 21 that separates the document D fed to the pickup roller 22 one by one. And a separation pad 15. The ADF 7 also feeds a pair of transport rollers 23 for transporting the document D with its leading edge aligned, a platen roller 40 for transporting the document D on the document reading position 11, and a discharge for discharging the document D that has been read to the discharge tray 8. A roller pair 24.

  On the document tray 10, a document bundle made up of a plurality of documents can be placed, and a side guide 12 that defines the width of the stacked document bundle is configured. A stopper 13 is provided on the downstream side of the document tray 10 in the document conveyance direction, and defines the leading end position of the document bundle on the document tray 10. A document detection sensor 14 is configured on the upstream side of the stopper 13 in the document transport direction, and the document detection sensor 14 detects whether or not a document is placed on the document tray 10.

  A separation pad 15 and a separation roller 21 are configured on the downstream side of the stopper 13 in the document conveyance direction. A pickup roller 22 is configured on the upstream side of the separation roller 21 in the document conveyance direction. The separation roller 21 can be connected to the conveyance motor 32 via the separation clutch 25. The separation roller 21 is drivingly connected to the stopper 13 and is connected to the pickup roller 22 via an arm member 34.

  The conveyance roller pair 23 is provided downstream of the separation roller 21 and can be connected to the drive motor 32 via the conveyance clutch 26. A conveyance sensor 16 is configured upstream of the conveyance roller pair 23 in the document conveyance direction, and the conveyance sensor 16 detects whether or not the document has been conveyed to the conveyance roller pair 23. When the document is detected by the transport sensor 16, the leading edge of the document D is abutted against the nip portion, and a loop is generated in the document D to align the leading edge of the document D. Thereafter, when the transport clutch 26 is operated, the transport roller pair 23 rotates and transports the document D toward the document reading position 11.

  The platen roller 40 is provided above the reading glass 5 downstream of the conveying roller pair 23 and is connected to the drive motor 32. When the drive motor 32 operates, the platen roller 40 rotates and conveys the document D onto the reading glass 5 toward the discharge roller pair 24. A mylar 42 is provided upstream of the platen roller 40, and guides the document conveyed by the conveyance roller pair 23 to the platen roller 40. As shown in FIG. 1B, the mylar 42 is used to prevent the leading edge of the document from entering the gap between the conveyance guide 44 on the upstream side of the platen roller 40 and the platen roller 40 to cause a paper jam. The document reading position 11 is provided on the reading glass 5, and an image is read by the image sensor unit 4 while the document D is conveyed on the document reading position 11.

  On the downstream side of the platen roller 40 in the document conveyance direction, a discharge roller pair 24 constituting the reverse discharge unit 9 is formed. The discharge roller pair 24 can be contacted and separated by a separation solenoid 36. A discharge tray 8 is configured downstream of the discharge roller pair 24 in the document conveyance direction. The discharge roller pair 24 is transported on the document reading position 11 by the transport roller pair 23, and transports the document D that has been read by the image sensor unit 4 onto the discharge tray 8. In the case of double-sided reading for reading the back side of the document D, the discharge roller pair 24 switches the document D back and transports it again to the transport roller pair 23 through the reverse path.

  FIG. 2A is a diagram illustrating a driving configuration of the carriage 201 of the image reading apparatus 1. The carriage 201 is mounted with the image sensor unit 4 and can reciprocate in the sub-scanning direction indicated by the arrow B in FIG. The image sensor unit 4 is provided with a plurality of light receiving sensors 202 in a line shape. An arrow A in FIG. 2 is the main scanning direction. As shown in FIG. 2A, the carriage 201 has two shafts in the sub-scanning direction when the motor 203 (driving unit) on the back side in the main scanning direction (upper side in the figure) drives the belt 204. Reciprocate along 205.

  FIG. 3A is a diagram illustrating a configuration of the control unit 300 that controls the image reading apparatus 1. The control unit 300 is configured inside the image reading apparatus 1, for example. A CPU 301 as a calculation unit, a RAM 302 as a memory unit, and a ROM 303 are connected to a bus 309 configured on the motherboard. Further, the bus 309 includes an optical motor 304, a home position (HP) sensor 305, an image reading unit 306, a communication interface (I / F) 307, a separation clutch 25, a document presence sensor 34, a drive motor 32, an operation unit 308, A motor 203 is connected. Each block shown in FIG. 4 can communicate with each other via a bus 300.

  The CPU 301 comprehensively controls the operation of the image reading apparatus 1. The RAM 302 is a general-purpose RAM, and is used, for example, as a work area for the CPU 301 and a temporary storage area for data. The ROM 303 is a general-purpose ROM and stores, for example, a firmware program for controlling the image reading apparatus 1 and a boot program for controlling the firmware program, and is read and executed by the CPU 301. The operation of the present embodiment is realized, for example, when the CPU 301 reads a program stored in the ROM 303 into the RAM 302 and executes it.

  The optical motor 304 drives a mirror of the optical system. The HP sensor 305 outputs a detection signal indicating whether or not the carriage 201 is at the home position (standby position). The image reading unit 306 includes a mechanism portion for reading a document image, and includes the image sensor unit 4, the carriage 201, the motor 203, the belt 204, and the shaft 205 of FIGS. 1 and 2. The communication interface 307 enables communication between the image reading apparatus 1 and a network such as an external LAN, and receives jobs and data from the external apparatus, for example. The operation unit 308 includes a display unit that displays an apparatus state, a job processing status, a setting screen that can accept job setting and instruction execution, and the like. The operation unit 308 includes keys and the like, and receives instructions and setting operations from an operator (user).

  FIG. 3B shows a block configuration of a control system when the image reading apparatus 100 is connected to the recording apparatus 328 and configured as an image forming apparatus 340 in which a scan function, a print function, a copy function, and the like are integrated. FIG. Such an image forming apparatus 340 includes an image reading apparatus 300, a recording apparatus 328, an image reading apparatus 300, and a controller unit 330 that comprehensively controls the recording apparatus 328.

  The controller unit 330 includes a CPU 321, ROM 322, RAM 323, HDD 324, external interface (IF) 325, scanner IF 326, and printer IF 327. For example, the CPU 321 executes the function of the image forming apparatus 340 by reading a program stored in the ROM 322 into the RAM 323 and executing the program. For example, when a copy function execution instruction is received from the user, the CPU 321 instructs the image reading apparatus 300 to perform a reading operation via the scanner IF 326 and instructs the recording apparatus 328 to perform a recording operation via the printer IF 327. When the CPU 301 of the image reading apparatus 300 receives an instruction from the CPU 321 of the controller unit 330 via the scanner IF 326, the CPU 301 performs overall control of the image reading apparatus 300 and executes a document reading operation. The external IF 325 can communicate with an external device via a network such as a LAN, and receives a scan job from an external host computer, for example.

  The recording device 328 has a configuration corresponding to various recording methods such as an inkjet recording method and an electrophotographic method, and records an image on a recording medium. For example, the recording device 328 may perform a recording operation based on image data received from the outside by the external IF 325 or may perform a recording operation based on image data acquired by the reading operation of the image reading device 300.

  Although not shown in FIG. 3B, the controller unit 330 includes functions of the image forming apparatus 300 such as an image processing unit for converting image data to be recorded into recording data that can be recorded by the recording device 328. The processing configuration necessary to execute is appropriately included.

  Next, the scanning operation control operation by the ADF 7 in this embodiment will be described with reference to FIG. Each process of FIG. 4 is implement | achieved when CPU301 reads the program memorize | stored in ROM303 to RAM302 and performs it, for example.

  When the scanning process by the ADF 7 is started by a user instruction or the like via the operation unit 308, the CPU 301 moves the carriage 201 to a position below the white reference plate, reads the white reference plate, and performs shading (S401). . Further, the CPU 301 assigns 0 to a variable N reserved in advance in the RAM 302, and initializes the retry counter value (S402).

  Next, the CPU 301 detects the edge of the mylar 42 from the read data read by the image sensor unit 4 while moving the carriage 201 to the document reading position 11 (S403). At this time, as shown in FIG. 5, detection is performed at a plurality of locations of the mylar 42 in the main scanning direction. Next, the CPU 301 calculates a value (X below) indicating the linearity in the main scanning direction of the plurality of detection points from the detection results of the edges of the mylar 42 detected at the plurality of points. The degree of sex is determined (S404).

  In the present embodiment, when calculating the linearity value in the main scanning direction at a plurality of detection locations, the edges of the Mylar 42 are detected at 5 locations in the main scanning direction, and X indicating linearity is expressed by the formula ( Calculated according to 1).

X = D5- (D2-D1) × 4 (1)
Here, the detected positions in the sub-scanning direction are D1, D2, D3, D4, and D5 from the back side to the near side in the main scanning direction, respectively.

  In the present embodiment, different processes are performed according to the calculated value of X. When it is determined that the value of X is equal to or less than the predetermined threshold A, the CPU 301 determines that the linearity of the plurality of detection points in the main scanning direction is high and the traveling state of the carriage 201 is normal, and performs scanning by the ADF 7. That is, the CPU 301 conveys the document D stacked on the document tray 10 to the document reading position 11 (S405), reads the document D by the image sensor unit 4 (S406), and reads the document D that has been read to the discharge tray 8. Discharge (S407). After S407, the CPU 301 moves the carriage 201 to the standby position (S408) and ends the process of FIG.

  On the other hand, when it is determined in S404 that the value of X is larger than the threshold value A, the CPU 301 determines whether or not the variable N is 1 (S409). Here, if it is determined that the variable N is not 1 (the variable N is 0), that is, if it is determined that the determination in S404 is the first time, the movement of the carriage 201 is retried. In the retry operation, the CPU 301 moves the carriage 201 to the standby position (S413), substitutes 1 for the variable N (S414), and repeats the processing from S403 again. When it is determined that the variable N is 1 in S409 (that is, after it is determined that the retry has been performed), the CPU 301 determines the value of X again (S410). In that case, different processing is performed according to the value of X after the retry.

  When it is determined in S410 that the value of X is between the thresholds A to B (A <B), the CPU 301 determines that there is an unstable sign in the traveling state of the carriage 201 and there is an inclination in the main scanning direction. In the present embodiment, when the CPU 301 determines that the value of X is between the threshold values A to B (A <B) in S410, the CPU 301 has a low linearity in the main scanning direction at a plurality of detection locations, but an allowable range ( Slightly). Then, the CPU 301 displays a warning message to that effect on the operation unit 308 (S411), and then performs scanning with the ADF 7 (S405 to S407). Here, a warning message may be displayed, and an instruction to allow or not execute the scan may be received from the user. When an instruction to execute the scan is received, the processes of S405 to S407 may be executed.

  On the other hand, if it is determined in S410 that the value of X is larger than the threshold value B, the CPU 301 determines that there is an inclination in the main scanning direction due to instability of the traveling state of the carriage 201, and therefore there is a high possibility that an image defect will occur. To do. Then, the CPU 301 displays an error on the operation unit 308 (S412), and does not perform scanning by the ADF 7. That is, after S412, the processing of S405 to S407 is not performed, and the CPU 301 moves the carriage 201 to the standby position (S408) and ends the processing of FIG.

  The image sensor unit 4 reads an original image at the height of the lower end of the platen roller 40. Therefore, if the reading position of the carriage 201 is deviated in the sub-scanning direction with respect to the center of the platen roller 40, the original is read at a floating position, and the read image becomes dark and uneven brightness occurs. According to the present embodiment, in such a state, it is possible to detect instability of the traveling state of the carriage 201 and to notify an error message to the user before scanning. In addition, when the carriage 201 travels normally for the second time (retry), the user can be notified that the travel may become unstable.

  As described above, in this embodiment, the unstable traveling state of the carriage 201 (that is, the inclination of the carriage 201) is detected by reading the edge of the mylar 42. That is, in this embodiment, the mylar 42 is a reference member for detecting instability of the traveling state of the carriage 201. Therefore, in order to detect instability of the traveling state of the carriage 201, other members in the image reading apparatus 1, such as a white reference plate, may be used as the reference member instead of the mylar 42.

[Second Embodiment]
Next, the scanning operation control operation by the ADF 7 in this embodiment will be described with reference to FIG. Each process of FIG. 6 is implement | achieved when CPU301 reads the program memorize | stored in ROM303 to RAM302 and performs it, for example. Hereinafter, differences from the above-described embodiment will be described.

  When the scanning process by the ADF 7 is started by a user instruction or the like via the operation unit 308, the CPU 301 moves the carriage 201 to a position below the white reference plate, reads the white reference plate, and performs shading (S601). . Next, the CPU 301 detects the edge of the mylar 42 from the read data read by the image sensor unit 4 while moving the carriage 201 to the document reading position 11 (S602). At this time, as shown in FIG. 5, detection is performed at a plurality of locations of the mylar 42 in the main scanning direction.

  Next, the CPU 301 calculates a value indicating linearity in the main scanning direction of the plurality of detection locations from the detection results of the edges of the mylar 42 detected at the plurality of locations, and determines the degree of linearity based on the values. (S603). The linearity value is calculated by the above-described equation (1). When it is determined that the value of X is equal to or less than the predetermined threshold, the CPU 301 determines that the linearity of the plurality of detection points in the main scanning direction is high and the traveling state of the carriage 201 is normal, and performs scanning by the ADF 7 (S604). ~ S606).

  On the other hand, if it is determined in S603 that the value of X is larger than the threshold value, the CPU 301 determines that there is a high possibility that an image defect will occur due to the inclination due to the unstable traveling state of the carriage 201, and the operation unit 308 displays A message prompting reading of the document table (pressure platen) is displayed (S608). Then, the CPU 301 does not perform scanning with the ADF 7. That is, after S608, the processing of S604 to S606 is not performed, and the CPU 301 moves the carriage 201 to the standby position (S607) and ends the processing of FIG. Here, in S608, a message indicating a possibility that an image defect may occur is displayed, and an instruction for reading on the platen (pressure plate), on-the-fly scanning with the ADF 7, or on scanning can be selectively accepted. It is also good. In this case, if reading on the document table (pressure platen) or scanning stop is selected, the process proceeds to S607. On the other hand, if the flow reading by the ADF 7 is selected, the process proceeds to S604.

  The image sensor unit 4 reads an original image at the height of the lower end of the platen roller 40. Therefore, if the reading position of the carriage 201 is deviated in the sub-scanning direction with respect to the center of the platen roller 40, the original is read at a floating position, and the read image becomes dark and uneven brightness occurs. According to the present embodiment, it is possible to reduce the degree of image degradation by prompting selection of document table reading in such a state and making it possible to change the reading method.

[Third Embodiment]
Next, the scanning operation control operation by the ADF 7 in this embodiment will be described with reference to FIG. Each process in FIG. 7 is realized, for example, when the CPU 301 reads out a program stored in the ROM 303 to the RAM 302 and executes it. Hereinafter, differences from the above-described embodiment will be described.

  When the scanning process by the ADF 7 is started by a user instruction or the like via the operation unit 308, the CPU 301 moves the carriage 201 to a position below the white reference plate, reads the white reference plate, and performs shading (S701). . Next, the CPU 301 determines the document reading position 11 by detecting the position of the edge of the Mylar 42 of the ADF 7.

  In the present embodiment, the mylar 42 is provided in the vicinity of the platen roller 40. Therefore, a position separated by a predetermined distance from the right end (right side in FIG. 1) of the mylar 42 in the right direction is set directly below the center of the platen roller 40, and the position is determined as the document reading position 11.

  First, the CPU 301 detects the edge of the mylar 42 from the image data read by the image sensor unit 4 while moving the carriage 201 (S702). At this time, as shown in FIG. 5, detection is performed at a plurality of locations of the mylar 42 in the main scanning direction. Next, the CPU 301 calculates a value indicating linearity in the main scanning direction of the plurality of detection locations from the detection results of the edges of the mylar 42 detected at the plurality of locations, and determines the degree of linearity based on the values. (S703). The linearity value is calculated by the above-described equation (1).

  When it is determined that the value of X is equal to or less than the predetermined threshold value, the CPU 301 determines that the linearity of the plurality of detection locations in the main scanning direction is high and the traveling state of the carriage 201 is normal. The CPU 301 determines the document reading position 11 based on the position of the edge of the mylar 42 as the detection position on the far side in the main scanning direction (S704: reading position determination). On the other hand, when it is determined that the value of X is larger than the predetermined threshold, the CPU 301 sets the detection position at the center in the main scanning direction among the plurality of detection points as the position of the edge of the mylar 42, and reads the document based on the position. The position 11 is determined (S710: reading position determination).

  After S704 and S710, the CPU 301 moves the carriage 201 to the determined document reading position 11 (S705). Thereafter, the CPU 301 performs scanning by the ADF 7 (S706 to S708), moves the carriage 201 to the standby position (S709), and ends the processing of FIG.

  The image sensor unit 4 reads an original image at the height of the lower end of the platen roller 40. Therefore, if the reading position of the carriage 201 is deviated in the sub-scanning direction with respect to the center of the platen roller 40, the original is read at a floating position, and the read image becomes dark and uneven brightness occurs. However, according to the present embodiment, the center detection position in the main scanning direction is set as the edge of the mylar 42 even when an inclination occurs due to the unstable traveling state of the carriage 201. As a result, the document reading position 11 can be determined at a position where the influence of the inclination of the carriage 201 on the image is as small as possible. Further, based on the reading results of a plurality of detection points, the positional deviation in the sub-scanning direction of the reading lines of the platen roller 40 and the carriage 201 due to the difference in inclination between the platen roller 40 and the carriage 201 is equal between the back side and the near side. The center point may be determined by allocating to each other.

[Fourth Embodiment]
Next, the adjustment processing of the document reading position 11 for scanning by the ADF 7 in this embodiment will be described with reference to FIG. This process is performed when the ADF 7 is installed. Each process of FIG. 8 is realized, for example, when the CPU 301 reads out a program stored in the ROM 303 to the RAM 302 and executes it. Hereinafter, differences from the above-described embodiment will be described.

  When the user or service person instructs the execution of adjustment processing via the operation unit 308, the CPU 301 moves the carriage 201 to a position below the white reference plate, reads the white reference plate, and performs shading (S801). . Next, the CPU 301 detects the edge of the mylar 42 from the read data read by the image sensor unit 4 while moving the carriage 201 (S802). At this time, as shown in FIG. 5, detection is performed at a plurality of locations of the mylar 42 in the main scanning direction. Next, the CPU 301 calculates a value indicating linearity in the main scanning direction of the plurality of detection locations from the detection results of the edges of the mylar 42 detected at the plurality of locations, and determines the degree of linearity based on the values. (S803). The linearity value is calculated by the above-described equation (1).

  When it is determined that the value of X is equal to or less than a predetermined threshold, the CPU 301 determines that the linearity of the plurality of detection points in the main scanning direction is high and the traveling state of the carriage 201 is normal. Based on either one, the document reading position 11 is determined (S804). Here, for example, the CPU 301 determines the document reading position 11 based on the innermost detection position in the main scanning direction among the plurality of detection points. The document reading position 11 is, for example, a position separated by a predetermined distance in the right direction from the right end (right side in FIG. 1) of the mylar 42 is regarded as immediately below the center of the platen roller 40, and that position is the document reading position. 11 may be determined. Thereafter, the CPU 301 displays on the operation unit 308 that the adjustment processing of the document reading position 11 has been completed normally (S805). Then, the CPU 301 moves the carriage 201 to the standby position and ends the process of FIG.

  On the other hand, when it is determined in S803 that the value of X is larger than the predetermined threshold, the CPU 301 displays an error occurrence on the operation unit 308 (S807). Then, the CPU 301 moves the carriage 201 to the standby position and ends the process of FIG.

  According to this embodiment, when the ADF 7 is installed and the document reading position 11 is adjusted, it is possible to prevent the document reading position 11 from being determined at an incorrect position due to the unstable traveling state of the carriage 201.

  As described above, according to each embodiment, the inclination in the main scanning direction due to the unstable traveling state of the carriage 201 is detected based on the reference member provided in the ADF 7 or the image reading apparatus. Depending on whether or not the result satisfies a predetermined condition, it is possible to reduce or prevent image degradation when scanning by the ADF 7 is executed.

  DESCRIPTION OF SYMBOLS 1 Image reader, 4 Image sensor unit, 7 ADF, 42 Mylar, 201 Carriage, 301 CPU, 302 RAM, 303 ROM

Claims (14)

A plurality of reading units arranged side by side, and reading means for optically reading a document image;
Moving means capable of moving the reading means in a direction orthogonal to a direction in which the plurality of reading units are arranged;
Based on the reading result when the reading unit reads the reference member extending in the direction in which the plurality of reading units are arranged, an inclination occurs in the direction in which the plurality of reading units of the reading unit are arranged with respect to the reference member. Determining means for determining whether or not
A reading apparatus comprising: Further comprising a control means for controlling the reading means and the moving means in accordance with a result of the judgment by the judging means.
The reading apparatus according to claim 1. The reference member includes a mylar,
The determination means determines whether the reading means is tilted based on a reading result when the Mylar is read at a plurality of locations.
The reading apparatus according to claim 1, wherein the reading apparatus is a reading apparatus. The reading means is a line type image sensor,
The reading of the original is reading of an original fed from an automatic feeding device provided in the reading device.
The reading device according to claim 1, wherein the reading device is a reading device. If it is determined by the determination means that the reading means is inclined, if the determination is the first time, the determination means causes the reading means to read the reference member, and again causes the reading means to tilt. To determine if
The reading apparatus according to any one of claims 1 to 4, wherein the reading apparatus comprises: When it is determined by the determination unit that the reading unit is inclined due to the determination again by the determination unit, the control unit does not read the original so that the reading unit and the moving unit do not read the original. To control the
The reading apparatus according to claim 2. A display unit for displaying a message to the user;
When it is determined that the inclination of the reading unit is slight due to the determination again by the determination unit, the control unit displays a warning message on the display unit and then reads the document. ,
The reading apparatus according to claim 2. If the determination means determines that the reading means is tilted, the control means changes the original reading method;
The reading apparatus according to claim 2. When it is determined by the determination means that the reading means is tilted, the control means is configured to read from a reading method using paper feeding from an automatic feeding device provided in the reading apparatus, and Change to the scanning method of the document placed on the
The reading device according to claim 8. Adjustment for adjusting the position of the reading unit for reading the document fed from the automatic feeding device provided in the reading device when the determination unit determines that the reading unit is inclined. means,
The reading apparatus according to claim 1, further comprising: The adjusting means adjusts the position of the reading means based on a reading result of a predetermined portion of the reference member;
The reading device according to claim 10. The predetermined portion is a center position of the reference member in a line direction of a line type image sensor which is the reading unit.
The reading device according to claim 11. A reading position determining means for determining a reading position at which the reading means reads a document image;
A second determination unit configured to determine whether the reading unit is tilted based on a reading result of the reference member by the reading unit when the reading position determination unit is executed;
A determination unit that determines a reading position of the document based on a reading result of the reference member by the reading unit when it is determined by the second determination unit that the reading unit is not inclined;
The reading apparatus according to claim 1, further comprising: A control method that is executed in a reading apparatus that includes a plurality of reading units arranged side by side and includes a reading unit that optically reads a document image,
A moving step capable of moving the reading means in a direction orthogonal to a direction in which the plurality of reading units are arranged;
Based on the reading result when the reading unit reads the reference member extending in the direction in which the plurality of reading units are arranged, an inclination occurs in the direction in which the plurality of reading units of the reading unit are arranged with respect to the reference member. A determination step for determining whether or not
A control method characterized by comprising:

Images