JP2014112795A - Image reading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reading device which allows a reading section to read both sides of a document by a single conveyance, in a configuration for switching the conveyance side position and the carriage side position of a switching gear.SOLUTION: An image reading device includes a conveyance reading section for reading the image of a document conveyed by a conveyance section, a movement reading section for reading the image of a document, conveyed by the conveyance section, on the side different from the side being read by the conveyance reading section, a switching gear, and a control section. The switching gear is switched between the carriage side position (FB side position) during movement reading (FB reading), and the conveyance side position (ADF side position) during conveyance reading (ADF reading). The control section performs reading process (step S155) for making the conveyance reading section and movement reading section, facing a document conveyed by the conveyance section, read the document during conveyance reading.

Description

  The present invention relates to an image reading apparatus, and more particularly, to an image reading apparatus that operates a conveying device that conveys a sheet-like document to a reading unit such as a CIS and a moving device that moves the reading unit with the power of one motor.

  Patent Document 1 discloses a conventional image reading apparatus that operates a conveyance device that conveys a sheet-like document to a reading unit such as a CIS and a moving device that moves the reading unit, for example, a carriage by the power of one motor. Is known. According to this image reading apparatus, the carriage that is the position where the switching gear, which is a transmission unit that transmits the drive of the motor, transmits the power to the conveyance device, and the position where the transmission unit transmits the power to the moving device. By switching the side position, the transport device and the moving device can be operated by one motor.

JP 2006-86817 A

  However, conventionally, in a configuration in which the moving device and the conveyance device are operated by the power of one motor, that is, in a configuration in which the switching gear is switched between the carriage side position and the conveyance unit side position, both sides of the document are conveyed by one conveyance. There was no technique for causing the reading unit to read.

  Therefore, the present invention provides a technique that allows the reading unit to read both sides of a document in one transport in a configuration in which the position of the transport unit and the position of the carriage are switched with respect to the switching gear.

An image reading device disclosed in this specification includes a transport unit that transports a document along a transport path, a transport reading unit that reads an image of the document transported by the transport unit, and a carriage that moves in a predetermined direction. A moving reading unit that reads an image on a surface different from a surface read by the conveyance reading unit, a motor, and power supplied by the motor are transmitted to the document held by the carriage and conveyed by the conveyance unit. A motor-side transmission gear; a conveyance-unit-side transmission gear that transmits the power to the conveyance unit; and a carriage that moves the carriage when the conveyance unit reads the image of the document conveyed by the conveyance unit by the reading unit. A carriage-side transmission gear that transmits the power to the carriage when moving and reading the image of the document by the reading unit; and And the carriage side transmission gear meshes with the conveyance unit side transmission gear at a position of the conveyance unit side connecting the data transmission side transmission gear and the conveyance unit side transmission gear. A switching gear that switches so as to mesh with the carriage-side transmission gear at a carriage-side position that couples the document, and a control unit, wherein the control unit conveys the document conveyed by the conveyance unit during the conveyance reading A reading process is executed in which the conveyance reading unit and the moving reading unit in a state of being opposed to each other read the document conveyed by the conveyance unit.
According to this configuration, in the configuration in which the switching gear is switched between the conveyance unit side position and the carriage side position, the reading unit performs reading processing so that both sides of the document are read by the reading unit in one conveyance. Can be made.

In the image reading apparatus, the control unit performs a conveyance correction data acquisition process for acquiring correction data for correcting an image of a document read by the conveyance reading unit, and the conveyance correction data acquisition process. A moving process for moving the carriage to a position facing the document conveyed by the conveying unit, and a switching process for switching the switching gear from the carriage side position to the conveying unit side position after the moving process are executed. You may make it do.
According to this configuration, it is possible to shorten the time taken to start the conveyance reading by executing the acquisition of the correction data by the conveyance reading unit and the movement process in parallel.

In the image reading apparatus, the control unit performs a conveyance correction data acquisition process for acquiring correction data for correcting an image of a document read by the conveyance reading unit and the conveyance correction data acquisition process. A moving process for moving the carriage to a position facing the document conveyed by the conveying unit; and a switching process for switching the switching gear from the carriage side position to the conveying unit side position after the moving process. The image reading apparatus includes a signal generation unit that generates a timing signal that is commonly used in the conveyance correction data acquisition process and the movement process, and the control unit is configured to output the timing signal generated by the signal generation unit. The timing process for controlling the generation and the setting determination process for determining whether or not the reading setting is set to high resolution. When the setting determination process determines that a high resolution is set, after executing the conveyance correction data acquisition process, the timing process changes the frequency of the timing signal and executes the movement process. You may make it do.
When the correction data is acquired at the reading timing corresponding to the high resolution, the movement speed of the carriage is slower than that corresponding to the low resolution as a result of corresponding to the high resolution. When the correction data is acquired, for example, when the frequency of the timing signal is decreased, the completion of the movement process tends to be delayed. Therefore, according to this configuration, the correction data acquisition by the conveyance reading unit and the movement process are separately performed, and the frequency of the timing signal in the movement process is increased so that the movement speed in the movement process is increased. Thus, it is possible to prevent the movement data from being affected by the acquisition of the correction data, and to prevent the completion of the movement process from being delayed.

In the image reading apparatus, when the control unit determines that the high resolution is not set in the setting determination process, the control unit generates the timing correction process when executing the conveyance correction data acquisition process. The movement process may be executed based on the timing signal.
The movement speed of the carriage is less likely to be lowered when the frequency of the timing signal is high than when the resolution is low, and is faster than when the resolution is high. In addition, the completion of the movement process is unlikely to be delayed. Therefore, according to this configuration, it is possible to shorten the time required to start the conveyance reading by executing the acquisition of the correction data of the conveyance reading unit and the movement process in parallel.

The image reading apparatus may further include a document detection unit that is provided upstream of the conveyance reading unit and the moving reading unit in the conveyance path and detects the document, and the control unit includes the document detection unit. The original detection process for detecting the original is executed by the above-mentioned, and if the original is detected in the original detection process after the start of the switching process and before the reading of the original, the driving of the motor is stopped. The stop process may be executed.
When a document is detected in the document detection process, the document is inadvertently drawn into the conveyance path before starting the document reading operation. Therefore, according to this configuration, the document is drawn into the conveyance path. It is possible to prevent the correction data from being obtained from the original.

Further, in the image reading apparatus, the control unit executes a determination process for determining whether or not the conveyance correction data acquisition process is completed following the movement process, and the conveyance correction data is determined in the determination process. When it is determined that the acquisition process has been completed, the switching process may be executed.
During the switching process, a new document may be drawn into the transport path, and the transport reading unit may acquire correction data from the document. For this reason, it is preferable to perform the switching process after the acquisition of the correction data by the conveyance reading unit is completed as in this configuration so that a new document is not drawn into the conveyance path.

The image reading apparatus further includes a member to be read provided on a movement path of the carriage, and the control unit causes the moving reading unit to read the member to be read before the movement process. A movement correction data acquisition process for acquiring correction data for correcting the image of the original read by the movement reading unit may be executed.
In the configuration in which the transfer gear side position and the carriage side position are switched with respect to the switching gear, the carriage cannot be moved after the switching process. Therefore, the acquisition process needs to be executed in advance before the movement process. Therefore, according to this configuration, it is possible to efficiently execute processing up to the start of conveyance reading.

  According to the present invention, it is possible to cause the reading unit to read both sides of a document with one transport in a configuration in which the switching gear is switched between the transport unit side position and the carriage side position.

1 is an external perspective view showing a state where an original cover is closed in an image reading apparatus according to an embodiment of the present invention. 1 is an external perspective view showing a state where a document cover is opened in an image reading apparatus according to an embodiment of the present invention. 1 is a schematic cross-sectional view of an image reading apparatus according to an embodiment of the present invention. Explanatory drawing which shows the case where a planetary gear exists in FB side position Explanatory drawing showing the case where the planetary gear is at the ADF side position Block diagram schematically showing the electrical configuration of the image reading apparatus The flowchart which shows the process which concerns on Example 1 of a scan function process. Time chart showing the relationship between interrupt signals and CPU processing Flowchart showing processing according to embodiment 2 of scan function processing Flowchart showing processing according to Embodiment 3 of scan function processing

Next, an embodiment will be described with reference to FIGS.
1. External Configuration of Image Reading Device As shown in FIG. 3 and the like, the image reading device 1 includes a conveyance reading unit 6, a moving reading unit 7, a carriage 8, an automatic document feeder (auto document feeder: ADF) device 40, and a document. Includes stand 3 etc. As shown in FIG. 1, an operation unit 11 including various buttons and a display unit 12 including, for example, a liquid crystal display are provided on the front side of the image reading apparatus 1. The operation unit 11 includes a reading start key 11A and a power key 11B.

  As an image reading method, the image reading apparatus 1 is moved by a moving reading (hereinafter referred to as “FB (flatbed) reading”) that moves the carriage 8 to read an image, and is conveyed by a conveying unit 44 (see FIG. 3). A conveyance reading for reading a document (hereinafter referred to as “ADF reading”). Note that the image reading apparatus 1 may be a single scanner device or a copy machine, or may be a part of a so-called multi-function machine having a print function and a FAX function.

  As shown in FIG. 2, the document table 3 is provided with a first reading window closed by a transparent platen 3B such as glass or acrylic. And the mounting surface 3A is comprised by the platen 3B. A document cover 5 is assembled to the upper surface side of the document table 3 via a hinge mechanism 5A.

  Therefore, the document cover 5 can be oscillated and displaced between a position covering the document table 3 shown in FIG. 1 and a position separated from the document table 3 shown in FIG. When performing FB reading, the user needs to manually open the document cover 5 and place the document on the mounting surface 3A.

  Further, the image reading apparatus 1 includes a driving force transmission mechanism 13 and a load generating unit 25 as shown in FIG. The load generating unit 25 includes a first contacted part 25 </ b> A provided in the movable reading unit 7 and a first stopper part 25 </ b> B provided on the document table 3.

  On the lower side of the mounting surface 3A, a moving reading unit 7 that moves along the mounting surface 3A is provided (see FIG. 3). The moving reading unit 7 receives light reflected on the original and emits an electric signal based on the received light. Then, the image reading apparatus 1 reads an image by converting an image such as a character written on a document into an electric signal via the moving reading unit 7.

  Here, the moving reading unit 7 is configured to read a document by a CIS (Contact Image Sensor) method. The moving reading unit 7 linearly reflects reflected light reflected by a document or the like, a linear image sensor 7C in which a plurality of light receiving elements are linearly arranged in the direction perpendicular to the paper surface, a light source 7A composed of RGB light emitting diodes, and the like. It includes a rod lens array 7B that forms an image on each light receiving element of the image sensor 7C.

  The carriage 8 that holds the moving reading unit 7 is coupled to the toothed belt 9A and moves in the direction of arrow A or B as the toothed belt 9A moves. The toothed belt 9A is driven by a driving force transmission mechanism described later via a first toothed pulley 9B (see FIG. 4). The moving reading unit 7 is not limited to the CIS method, but may be a so-called CCD method using a reduction optical system and a CCD (charge coupled device) image sensor.

  Further, when reading the original placed on the platen 3B, that is, when executing the FB reading, the moving reading unit 7 uses the carriage 8 coupled to the toothed belt 9A to move the platen 3B from the standby position WP. A document is read while being conveyed at a constant speed in a direction parallel to (A direction in FIG. 3). At this time, the reading range in the transport direction is, for example, from the reading start position PS to the reading end position PE shown in FIG. In the present embodiment, the reading start position PS is constant regardless of the reading range of the document, and the reading end position PE is varied according to the reading range of the document.

  On the other hand, the moving reading unit 7 reads a document conveyed by the ADF device 40, that is, when ADF reading is executed, the carriage reading position (hereinafter referred to as “ADF reading”) immediately below the second reading window 3C by the carriage 8. The document is read by being held by RP. The moving reading unit 7 reads, for example, an image on the surface of a conveyed document when performing double-sided reading.

  Further, as shown in FIG. 3, a document pressing member 46B for pressing a document during ADF reading is provided immediately above the second reading window 3C. That is, the document pressing member 46B is provided at a position facing the moving reading unit 7 at the ADF reading position RP. Therefore, the moving reading unit 7 is located at the ADF reading position RP, and reads the document pressing member 46B when there is no document. In the present embodiment, the surface of the document pressing member 46B that faces the moving reading unit 7 is, for example, white.

  2 includes a first toothed pulley 9B (see FIG. 4) and a second toothed pulley 9C fixed to the document table 3, and a first toothed pulley 9B and a second toothed pulley. It has a toothed belt 9A and the like suspended between the pulley 9C. Then, the toothed belt 9A rotates by obtaining a driving force from the first toothed pulley 9B. The carriage 8 is connected to a toothed belt 9A. For this reason, the carriage 8 moves according to the rotation direction of the toothed belt 9A.

  The second reading window 3C is also closed with a transparent platen such as glass, like the first reading window, that is, the placement surface 3A. As shown in FIG. 3, the placement surface 3 </ b> A and the second reading window 3 </ b> C are partitioned by a beam-shaped partition member 3 </ b> D. Between.

  Further, as shown in FIG. 3, an adjustment reference plate 55 is provided on the partition member 3D. The adjustment reference plate 55 is used for readjusting the color and density reference at the time of reading and the reference position of the moving reading unit 7.

  The adjustment reference plate 55 includes, for example, a white tape (an example of a member to be read) 55A and a black tape 55B arranged in the sub-scanning direction (left and right direction in FIG. 3). In the present embodiment, a predetermined position in the range in the left-right direction in FIG. 3 that faces the white tape 55A is set as the standby position WP. In this embodiment, the standby position WP is a position where the mobile reading unit 7 waits when the mobile reading unit 7 is not executing FB reading. The standby position WP is a reference position when the moving reading unit 7 performs reading scanning. Further, when the moving reading unit 7 is positioned at the standby position WP, the white tape 55A is read and white data is acquired. Note that before the white data is acquired, light is adjusted from the moving reading unit 7 by irradiating the white tape 55A with light. Document read data is corrected using the acquired white data. In the case of double-sided reading, for example, read data on the surface of a document is corrected using the acquired white data.

  The document cover 5 is provided with an ADF device 40 as shown in FIG. The ADF device 40 includes various rollers such as a transport path 4, a transport reading unit 6, a document pressing member 46A, an ADF cover 41, a document tray 42, a paper feed roller 44A, transport rollers 44B, 44C, 44D, and a paper discharge roller 44E. And a paper discharge tray 43 using the upper surface of the document cover 5. Further, a plurality of driven rollers 45 are provided to face the transport rollers 44B, 44C, 44D and the paper discharge roller 44E.

  As shown in FIG. 3, the conveyance reading unit 6 and the document pressing member 46A are fixed to the ADF device 40 above the document pressing member 46B. The document pressing member 46 </ b> A is provided at a position facing the conveyance reading unit 6. The conveyance reading unit 6 reads, for example, an image on the back side of a document conveyed by the conveyance unit 44 at the time of ADF reading during double-sided reading.

  The configuration of the transport reading unit 6 is the same as the configuration of the moving reading unit 7. That is, the conveyance reading unit 6 is configured to read a document by the CIS method here. The conveyance reading unit 6 includes a linear image sensor 6C, a light source 6A, and a rod lens array 6B.

  Further, the conveyance reading unit 6 reads the document pressing member 46A when there is no document. The surface of the document pressing member 46A facing the conveyance reading unit 6 is, for example, white as in the case of the document pressing member 46B. Therefore, when the conveyance reading unit 6 reads the document pressing member 46A, the white pattern is read and white data is acquired. Note that before the white data is acquired, light is adjusted by irradiating the document pressing member 46A with light from the conveyance reading unit 6. At the time of double-sided reading, for example, read data on the back side of the document is corrected using the acquired white data.

  Further, a front sensor 47 such as a photo sensor for detecting a document set on the document tray 42, and a document sensor such as a photo sensor for detecting a document conveyed by the conveyance roller 44B (an example of a document detection unit). 49) and a rear sensor 48 such as a photosensor for detecting a document conveyed by the conveyance rollers 44C and 44D.

The document sensor 49 is provided upstream of the conveyance reading unit 6 and the moving reading unit 7 in the conveyance path 4 and detects a document. The rear sensor 48 is provided in the conveyance path 4 on the upstream side of the document conveyance with respect to the moving reading unit 7. Here, the paper feed roller 44A, the transport rollers 44B, 44C, and 44D, and the paper discharge roller 44E correspond to an example of the transport unit 44 that transports a document.
In the ADF device 40, the document placed on the document tray 42 is conveyed one by one by the conveyance unit 44 and discharged to the paper discharge tray 43.

2. Driving force transmission mechanism 2-1. Configuration of Driving Force Transmission Mechanism In this embodiment, the moving mechanism 9 and the conveyance unit 44 are driven by one motor 31. That is, the driving force transmission mechanism 13 selectively transmits the driving force generated by the motor 31, that is, the motor torque, to the moving mechanism 9 or the conveyance unit 44.

  As shown in FIG. 4, the driving force transmission mechanism 13 according to the present embodiment includes a planetary gear mechanism having a sun gear (an example of a motor-side transmission gear) 15, a planetary gear (an example of a switching gear) 17, an engagement portion 19, and the like. , A carriage side transmission gear (hereinafter referred to as “FB side transmission gear”) 21, and a conveyance unit side transmission gear (hereinafter referred to as “ADF side transmission gear”) 23.

  The sun gear 15 transmits the power supplied by the motor 31 (see FIG. 6) to the planetary gear 17. Further, the sun gear 15 rotates without being displaced with respect to the document table 3. The sun gear 15 rotates by obtaining a driving force from the motor 31, and the rotation direction of the sun gear 15 rotates forward or reverse in conjunction with the rotation direction of the motor 31. That is, in this embodiment, the rotation direction of the motor 31 and the rotation direction of the sun gear 15 are equal.

  The FB side transmission gear (an example of a carriage side transmission gear) 21 transmits the power from the motor 31 to the carriage 8 during FB reading. On the other hand, the ADF side transmission gear (an example of the conveyance unit side transmission gear) 23 transmits the power from the motor 31 to the conveyance unit 44 at the time of ADF reading.

  At the time of ADF reading, the planetary gear 17 meshes with the ADF side transmission gear 23 at a transport unit side position (hereinafter referred to as “ADF side position”) connecting the sun gear 15 and the ADF side transmission gear 23, and FB At the time of reading, switching is performed so as to mesh with the FB side transmission gear 21 at a carriage side position (hereinafter referred to as “FB side position”) connecting the sun gear 15 and the FB side transmission gear 21. The planetary gear 17 rotates while meshing with the sun gear 15 and revolves between the FB side position shown in FIG. 4 and the ADF side position shown in FIG. 5 with the rotation center of the sun gear 15 as the revolution center. it can. Further, the planetary gear 17 rotates around the rotation center 17A.

  When the sun gear 15 rotates, the planetary gear 17 is subjected to a force for rotating the planetary gear 17 (hereinafter referred to as a rotating force) and a force for rotating the planetary gear 17 (hereinafter referred to as a rotating force). For this reason, when the sun gear 15 is rotating forward, a revolving force in a direction from the ADF side position toward the FB side position (a clockwise direction in FIG. 4) acts on the planetary gear 17.

  On the other hand, when the sun gear 15 is rotating in the reverse direction, a revolving force in a direction from the FB side position toward the ADF side position (a counterclockwise direction in FIG. 4) acts on the planetary gear 17. When the revolving force increases, the planetary gear 17 revolves in the direction of the revolving force. On the other hand, when the revolution force is small, it rotates without revolving.

  Hereinafter, the direction in which the planetary gear 17 rotates when the sun gear 15 is rotating forward is referred to as the normal rotation direction of the planetary gear 17. Similarly, the direction in which the planetary gear 17 rotates when the sun gear 15 is reversed is referred to as the direction of reverse rotation of the planetary gear 17. In addition, each rotation direction of the sun gear 15 is opposite to each rotation direction of the planetary gear 17.

  The arm 18 supports the planetary gear 17 so that it can rotate and revolve. Then, one end side in the extending direction of the arm 18 is rotatably supported on the same axis as the sun gear 15. A planetary gear 17 is rotatably mounted on the other end side of the arm 18 in the extending direction.

  The document table 3 is provided with a second stopper portion 3H and a third stopper portion 3J that restrict the rotation of the arm 18. On the other hand, the arm 18 is provided with a second contacted portion 18A that contacts the second stopper portion 3H and a third contacted portion 18B that contacts the third stopper portion 3J.

  As shown in FIG. 4, the second stopper portion 3 </ b> H restricts the arm 18 from rotating in the clockwise direction on the paper surface by contacting the second contacted portion 18 </ b> A when the planetary gear 17 is at the FB side position. On the other hand, as shown in FIG. 5, the third stopper portion 3J restricts the arm 18 from rotating counterclockwise by contacting the third contacted portion 18B when the planetary gear 17 is at the ADF side position.

  Further, the first spring 16 is located when the planetary gear 17 is at the FB side position (hereinafter referred to as “when the FB side is located”) or when the planetary gear 17 is at the ADF side position (hereinafter when “the ADF side position”). The switching of the planetary gear 17 is suppressed. That is, the first spring 16 suppresses the planetary gear 17 from being separated from the FB-side transmission gear 21 when the sun gear 15 is rotating during FB reading. That is, the first spring 16 causes the planetary gear 17 to exert a force that suppresses the planetary gear 17 from revolving to the ADF side position at least at the FB side position (hereinafter referred to as a first suppression force).

  Note that the first spring 16 according to the present embodiment is a tension coil spring. One end side of the first spring 16 in the extension direction is connected to the opposite side of the planetary gear 17 across the swing center of the arm 18, and the other end side in the extension direction is connected to the document table 3. .

  For this reason, the first spring 16 also causes the arm 18 to act on the arm 18 with a force that suppresses the planetary gear 17 from revolving to the FB side position at the ADF side position.

  By the way, when the planetary gear 17 is at the ADF side position, as described later, it is when the driving force is transmitted to the transport unit 44 and when the sun gear 15 is reversed. When the sun gear 15 is rotating in reverse, a force for revolving the planetary gear 17 from the FB side position to the ADF side position acts on the planetary gear 17.

  For this reason, in the present embodiment, the planetary gear 17 does not have the second suppression force at least during transmission of the driving force to the transport unit 44, that is, during the reverse rotation of the sun gear 15. Continue to stay in the side position.

  Therefore, in this embodiment, the first suppression force that suppresses the revolution that the first spring 16 acts on the planetary gear 17 at the FB side position is suppressed, and the revolution that the first spring 16 acts on the planetary gear 17 at the ADF side position is suppressed. It is made larger than the 2nd suppression force to do.

  Specifically, the positions of the one end in the extension direction and the other end in the side extension direction are set so that the deformation amount of the first spring 16 at the FB side position is larger than the deformation amount of the first spring 16 at the ADF side position. It is set.

  The meshing part 19 is a part that meshes with the teeth of the planetary gear 17 when the planetary gear 17 revolves between the FB side position and the ADF side position. And the meshing part 19 which concerns on this embodiment is comprised by the internal gear.

  As shown in FIG. 4, the meshing part 19 has a plurality of protrusions 19 </ b> A protruding toward the sun gear 15, and the protrusions 19 </ b> A are a kind of gear provided along the revolution path of the planetary gear 17. It is.

  The meshing portion 19 is assembled to the document table 3 so as to be movable with respect to the sun gear 15. The meshing portion 19 according to the present embodiment can be displaced in a direction along the revolution path of the planetary gear 17 with the sun gear 15 as the center. And when the meshing part 19 moves, the 2nd spring 19B which returns the meshing part 19 to the position before a movement is provided.

  In addition, the ADF side transmission gear 23 is hinge mechanism 5A than the FB side transmission gear 21 in the direction (in this embodiment, the front-rear direction) orthogonal to the movement direction of the moving reading unit 7 in the direction parallel to the placement surface 3A. It is arranged on the side. The ADF-side transmission gear 23 is a gear that rotates only in one direction. Therefore, the ADF side transmission gear 23 has a mechanism for preventing reverse rotation that rotates only in the X direction (see FIG. 5) in which the conveyance unit 44 conveys the original and does not rotate in the reverse direction. As a mechanism for preventing reverse rotation, for example, a known reverse rotation prevention claw (not shown) is provided.

  That is, as shown in FIG. 4, the FB side transmission gear 21 is disposed on the opposite side of the ADF side transmission gear 23 with the sun gear 15 interposed therebetween. The rotation axis directions of the sun gear 15, the planetary gear 17, the FB side transmission gear 21, and the ADF side transmission gear 23 are orthogonal to the placement surface 3A.

  Further, as shown in FIG. 4, the FB side transmission gear 21 meshes with the planetary gear 17 when the planetary gear 17 is in the FB side position. For this reason, at the time of the FB side position, the driving force is transmitted in the order of the sun gear 15 → the planetary gear 17 → the FB side transmission gear 21. Then, the first toothed pulley 9B is driven by the FB side transmission gear 21, and the moving mechanism 9 is operated.

  The moving mechanism 9 moves the carriage 8, that is, the moving reading unit 7 in the direction A in FIG. 3 when the sun gear 15 rotates in the forward direction, and moves the moving reading unit 7 in FIG. 3 when the sun gear 15 rotates in the reverse direction. Is moved in the B direction. That is, the movement reading unit 7 moves according to the rotation direction of the sun gear 15.

  As shown in FIG. 5, the ADF side transmission gear 23 meshes with the planetary gear 17 when the planetary gear 17 is at the ADF side position. For this reason, at the time of the ADF side position, the driving force is transmitted in the order of the sun gear 15 → the planetary gear 17 → the ADF side transmission gear 23, and the transport unit 44 operates.

  Moreover, as shown in FIG. 2 etc., the load generation part 25 which increases the rotational resistance of the FB side transmission gear 21 is provided. When the carriage 8, that is, the moving reading unit 7 is positioned at the ADF reading position RP, the load generating unit 25 is compared with the case where the moving reading unit 7 is positioned at a position other than the ADF reading position RP. Increase rotational resistance.

  That is, the load generating unit 25 according to the present embodiment includes a first contacted part 25A provided in the moving reading unit 7 and a first stopper part 25B provided on the document table 3. Then, the first contacted portion 25A and the first stopper portion 25B are in contact with each other as shown in FIG.

  For this reason, when the movement reading unit 7 is positioned at the ADF reading position RP and the first contacted part 25A and the first stopper unit 25B come into contact with each other when the sun gear 15 is reversely rotated, the movement reading unit 7 is moved. Due to the restriction, the rotational resistance of the FB side transmission gear 21 increases.

3. Operation of Driving Force Transmission Mechanism 3.1 During FB Reading When the image reading apparatus 1 is not in operation, the moving reading unit 7 is in the standby position WP, and the planetary gear 17 is in the FB side position. Then, for example, when the reading start key 11A is operated by the user and FB reading is started, the CPU 20 rotates the motor 31 in the normal direction to rotate the sun gear 15 in the normal direction.

  Thereby, the moving reading unit 7 moves from the standby position WP toward the reading end position PE. At this time, a revolving force in a direction from the ADF side position to the FB side position acts on the planetary gear 17. However, since the second stopper portion 3H and the second contacted portion 18A are in contact with each other, the planetary gear 17 stops at the FB side position and rotates in the forward direction without revolving.

  Then, for example, when the number of driving steps of the motor 31 reaches a predetermined value, the CPU 20 (see FIG. 6) reversely rotates the motor 31 to reversely rotate the sun gear 15. Further, the CPU 20 stops the motor 31 when it is determined that the moving reading unit 7 has reached the standby position WP. Thereby, the moving reading unit 7 moves from the reading end position side to the standby position WP.

  When the sun gear 15 is reversed, the planetary gear 17 has a revolving force in a direction from the FB side position to the ADF side position, that is, a revolving force in a direction to separate the planetary gear 17 from the FB side transmission gear 21. Works. However, since the revolving force is canceled by the first spring 16, the planetary gear 17 does not revolve and stops at the FB side position and rotates in the opposite direction.

3.2 During ADF Reading When the image reading apparatus 1 is not in operation, the moving reading unit 7 is in the standby position WP, and the planetary gear 17 is in the FB side position. Then, when the reading start key 11A is operated by the user to instruct the start of ADF reading, the CPU 20 reversely rotates the motor 31 to reversely rotate the sun gear 15.

  As a result, the moving reading unit 7, that is, the carriage 8 moves from the standby position WP to the ADF reading position RP. When the moving reading unit 7 is positioned at the conveyance reading position RP and the first stopper unit 25B and the first contacted unit 25A come into contact with each other, the movement of the moving reading unit 7 is restricted and the rotational resistance of the FB-side transmission gear 21 is reduced. Will increase.

  For this reason, the rotation of the planetary gear 17 is hindered and the rotation force is reduced. On the other hand, the direction revolving force that revolves the planetary gear 17 from the FB side position to the ADF side position increases. And when the said revolution force exceeds the 1st suppression force of the 1st spring 16, the planetary gear 17 and the meshing part 19 will mesh, and the planetary gear 17 will start to revolve to an ADF side position.

  When the planetary gear 17 revolves and the third stopper portion 3J and the third contacted portion 18B come into contact with each other, the revolution of the planetary gear 17 stops and the planetary gear 17 and the ADF side transmission gear 23 are shown in FIG. And bite. For this reason, a driving force is transmitted to the conveyance unit 44, and conveyance of the document is started.

  Further, when the CPU 20 determines that the ADF reading has been completed, the CPU 20 rotates the motor 31 in the normal direction to rotate the sun gear 15 in the normal direction. As a result, the planetary gear 17 is subjected to a revolving force in a direction from the ADF side position to the FB side position.

  When the revolution force exceeds the second suppression force of the first spring 16, the planetary gear 17 revolves toward the FB side position. When the planetary gear 17 is located at the FB side position, the planetary gear 17 and the FB side transmission gear 21 are engaged with each other, so that the moving reading unit 7 moves from the ADF reading position RP in the direction A in FIG.

4). As shown in FIG. 6, the image reading apparatus 1 includes a CPU 20 (an example of a control unit), a ROM 26, a RAM 27, an NVRAM (nonvolatile RAM) 28, a network interface (hereinafter referred to as a network I / F). ) 24, which includes a conveyance reading unit 6, a moving reading unit 7, an operation unit 11, a display unit 12, an interrupt signal generation unit 29, a counter 35, a front sensor 47, a rear sensor 48, a document sensor 49, and a motor drive IC 30. Etc. are connected. A motor 31 is connected to the motor drive IC 30.

  The operation unit 11 accepts instructions from the user to the image reading apparatus 1 such as power on / off, reading resolution setting, and reading start by user operation.

  Further, the network I / F 24 is connected to an external user computer (hereinafter referred to as a user PC) via a communication line (not shown), and mutual data communication is possible via the network I / F 24. . Note that a reading start instruction can be received from the user PC via the network I / F 24.

  Various programs for controlling the operation of the image reading apparatus 1 are stored in the ROM 26, and the CPU 20 controls each unit while storing the processing results in the RAM 27 or the NVRAM 28 according to the programs read from the ROM 26. Do. Further, for example, the ROM 26 stores the number of steps for stepping the motor 31.

  The motor 31 is a stepping motor. The motor drive IC 30 controls the drive of the motor 31 according to the control of the CPU 20. For example, the counter 35 counts the number of steps when the motor 31 is controlled.

  The interrupt signal generation unit 29 generates an interrupt signal Sw (an example of a timing signal) that is commonly used in a conveyance correction data acquisition process and a movement process, which will be described later, under the control of the CPU 20. That is, the CPU 20 performs a timing process for controlling generation of the interrupt signal Sw by the interrupt signal generation unit 29. Further, the CPU 20 executes reading control of the conveyance reading unit 6 and the moving reading unit 7 described later, or movement processing of the moving reading unit 7 based on the interrupt signal Sw generated by the timing process (see FIG. 8). .

  In addition, the CPU 20 controls the motor drive IC 30 to control the torque and rotation direction of the motor 31. The motor drive current and the motor torque are in a proportional relationship, and the motor torque can be increased by increasing the drive current. Alternatively, the driving speed and the motor torque are inversely proportional, and the motor torque can be increased by reducing the driving speed.

5. Scan Function Processing Next, with reference to FIGS. 7 to 10, each embodiment relating to scan function processing in the image reading apparatus 1 will be described. In the present embodiment, the scan function process will be described by taking, as an example, a case where the user has pressed the reading start key 11A and received an ADF reading instruction during ADF reading.

5-1. Example 1
In the scan function process of the first embodiment shown in FIG. 7, the CPU 20 first starts light amount adjustment and white data acquisition (an example of movement correction data acquisition process) by the moving reading unit 7 (step S105). Next, it is determined whether or not the light amount adjustment and white data acquisition by the moving reading unit 7 have been completed (step S110). When it is determined that the light amount adjustment and the white data acquisition by the moving reading unit 7 are not yet finished, the process waits until the light amount adjustment and the white data acquisition are finished (step S110: NO).

  On the other hand, when it is determined that the light amount adjustment and white data acquisition by the moving reading unit 7 have been completed (step S110: YES), the CPU 20 performs light amount adjustment and white data acquisition (an example of the conveyance correction data acquisition process) by the conveyance reading unit 6. ) Is started and the motor 31 is rotated by a predetermined step to move the moving reading unit 7 from the position facing the white tape 55A toward the ADF reading position RP (an example of a moving process) (step S115).

Next, the CPU 20 starts a switching operation (an example of switching processing) for switching the planetary gear 17 from the FB side position to the ADF side position (step S120).
Here, when the planetary gear 17 is switched from the FB side position to the ADF side position, the FB side transmission gear 21 due to the rotation force of the planetary gear 17 due to the reverse rotation of the sun gear 15 from the revolution suppressing force of the planetary gear 17 by the first spring 16. The reaction force from must be greater. Therefore, the motor torque in the switching operation is determined in advance by experiment, for example, so that the reaction force from the FB-side transmission gear 21 is larger than the revolution suppressing force of the planetary gear 17 by the first spring 16.

  The reaction force from the FB side transmission gear 21 is generated by the rotational resistance of the FB side transmission gear 21 by the load generator 25. That is, since the load generating unit 25 makes the FB-side transmission gear 21 almost impossible to rotate, when the planetary gear 17 tries to rotate, the planetary gear 17 repels from the FB-side transmission gear 21 in a direction almost opposite to the rotation force. Receive power.

  Thus, when the planetary gear 17 is switched, the rotation of the planetary gear 17 is stepped out of the rotation of the motor 31 by using the reaction force from the FB-side transmission gear 21 whose rotation is suppressed to the planetary gear 17. The planetary gear 17 can be suitably switched from the FB side position to the ADF side position.

  Next, the CPU 20 determines whether or not the document sensor 49 is turned on (step S125). If it is determined that the document sensor 49 is turned on (step S125: YES), the motor is stopped (an example of a stop process), and an error is displayed on the display unit 12, for example, to notify the user of the error (step S140). .

  That is, when a document is detected by the document sensor 49 while the planetary gear 17 is switched, the document is erroneously drawn into the conveyance path 4 before starting the document reading operation. Therefore, the CPU 20 prompts the user to remove the document from the conveyance path 4. Accordingly, it is possible to prevent the correction data from being acquired from the document drawn into the conveyance path 4.

  Next, the CPU 20 determines whether or not an original is removed from the conveyance path 4 by an error notification and an instruction to resume reading is issued (step S145). When it is determined that there is no instruction to resume reading, the process waits until there is an instruction to resume reading (step S145: NO). On the other hand, when it is determined that there is an instruction to resume reading (step S145: NO), the process proceeds to step S150.

  On the other hand, if it is determined in step S125 that the document sensor 49 is not turned on (step S125: NO), the CPU 20 determines whether or not a predetermined time has elapsed since the switching of the planetary gear 17 was started. For example, the determination is made based on the count value of the counter 35 (step S130). If it is determined that the predetermined time has not elapsed (step S130: NO), the process returns to step S125.

  On the other hand, if it is determined that the predetermined time has elapsed (step S130: YES), the planetary gear 17 is switched from the FB side position to the ADF side position, and the switching operation is ended (step S135). Then, the CPU 20 determines whether or not the light amount adjustment and the white data acquisition by the transport reading unit 6 have been completed (step S150: an example of determination processing). When it is determined that the light amount adjustment and the white data acquisition by the transport reading unit 6 have not been completed, the process waits until the light amount adjustment and the white data acquisition are completed (step S150: NO).

  On the other hand, when it is determined that the light amount adjustment and white data acquisition by the transport reading unit 6 have been completed (step S150: YES), the CPU 20 rotates the motor 31 again and controls the transport reading unit 6 and the moving reading unit 7. Then, double-sided reading of the document is performed (step S155: an example of reading processing). That is, during double-sided reading of ADF reading, the CPU 20 is conveyed by the conveying unit 44 to the conveying reading unit 6 and the moving reading unit 7 in a state facing the original conveyed by the conveying unit 44. Have the manuscript read.

When the document reading is completed, the CPU 20 performs a switching operation for switching the planetary gear 17 from the ADF side position to the FB side position (step S160).
The motor torque at the time of this switching operation is determined in advance by experiments so that the reaction force from the ADF side transmission gear 23 is larger than the revolution suppressing force of the planetary gear 17 by the first spring 16. As a result, the planetary gear 17 is disconnected from the ADF side transmission gear 23.

  The reaction force from the ADF-side transmission gear 23 is configured such that the ADF-side transmission gear 23 can only rotate in one direction (X direction). Therefore, when the planetary gear 17 tries to rotate, the planetary gear 17 A repulsive force in a direction almost opposite to the rotation force is received from the transmission gear 23.

  Thus, when the planetary gear 17 is switched, the rotation of the planetary gear 17 is stepped out of the rotation of the motor 31 by using the reaction force from the ADF side transmission gear 23 whose rotation is suppressed to the planetary gear 17. Therefore, the planetary gear 17 can be suitably switched from the ADF side position to the FB side position.

  Next, the motor 31 is rotated by a predetermined number of steps to move the moving reading unit 7 to a position facing the white tape 55A, and the scan function process is terminated (step S165).

<Effect of Example 1>
As described above, in the first embodiment, the CPU 20 opposes the conveyance correction data acquisition process for acquiring correction data for correcting the image of the document read by the conveyance reading unit 6 and the document conveyed by the conveyance unit 44. The movement reading unit 7, that is, the movement process for moving the carriage 8 to the position to be performed is performed in parallel (step S 115). Therefore, it is possible to shorten the time taken to start ADF reading.

  Further, the CPU 20 causes the moving reading unit 7 to read the white tape 55A before the moving process (step S115), thereby acquiring correction data for correcting the image of the document read by the moving reading unit 7. A movement correction data acquisition process (steps S105 and S110) is executed. In the configuration in which the planet gear 17 is switched between the ADF side position and the FB side position, after the switching process from the FB side position to the ADF side position, the carriage 8 is moved unless the reverse switching process is executed again. I can't. Therefore, by executing the movement correction data acquisition process in advance before executing the movement process for the switching process for switching the planetary gear 17 from the FB side position to the ADF side position, the process up to the start of ADF reading is made efficient. Can be executed automatically.

5-2. Example 2
Next, a second embodiment of the scan function process will be described with reference to FIGS. In the first embodiment, an example in which the conveyance correction data acquisition process and the movement process are executed at the same time is shown. In the second embodiment, an example in which the movement process is executed after the completion of the conveyance correction data acquisition process will be described. The same processes as those in the first embodiment are denoted by the same step numbers, and the description thereof is omitted.

  As shown in FIG. 8, in the second embodiment, the interrupt signal generation unit 29 uses a conveyance reading unit 6 provided on the upstream side of document conveyance to perform processing related to reading of the back side of the document (hereinafter, “upstream”). And a process related to reading of the surface of the document (hereinafter referred to as “downstream surface process”) using the moving reading unit 7 provided on the downstream side of the document conveyance. The case where the interrupt signal Sw is generated is assumed. That is, in the second embodiment, it is assumed that the interrupt signal generation unit 29 generates an interrupt signal Sw that is commonly used in the conveyance correction data acquisition process and the movement process. At that time, the interrupt signal Sw is transmitted from the interrupt signal generation unit 29 to the CPU 20 through one signal line SL. FIG. 8 shows an example in which the cycle of the interrupt signal Sw is a line cycle that is a read cycle for one line.

  In the second embodiment, as shown in FIG. 9, at the beginning of the scan function process, the CPU 20 determines whether or not the reading resolution setting value is larger than, for example, 600 dpi (step S200). That is, the CPU 20 determines whether the reading setting is set to high resolution (an example of setting determination processing).

  If it is determined that the reading resolution setting value is not greater than 600 dpi, that is, the resolution setting value is 600 dpi or less and the resolution is low (step S200: NO), step S105 of the first embodiment shown in FIG. The subsequent processes are executed. When the resolution setting value is a low resolution, it is preferable that the frequency of the interrupt signal Sw is not changed during the movement process of the moving reading unit 7, that is, during the movement process of the carriage 8. The reason is as follows.

  That is, the moving speed of the carriage 8 is less likely to be lowered when the resolution is low than when the frequency of the interrupt signal Sw is high, and is faster than when the resolution is high. In addition, the completion of the movement process is unlikely to be delayed. Therefore, in the case of low resolution, even if the frequency of the interrupt signal Sw is not changed, the acquisition and movement processing of the correction data of the conveyance reading unit 6 is performed in parallel (see step S115). It is possible to shorten the time taken to start.

  On the other hand, when determining that the setting value of the reading resolution is larger than 600 dpi (step S200: YES), the CPU 20 executes steps S105 and S110. If it is determined in step S110 that the light amount adjustment and white data acquisition by the moving reading unit 7 have been completed (step S110: YES), only the light amount adjustment and white data acquisition (conveyance correction data acquisition process) by the conveyance reading unit 6 are performed. Is started (step S205). Next, the CPU 20 determines whether or not the light amount adjustment and the white data acquisition by the transport reading unit 6 have been completed (step S210).

  When it is determined that the light amount adjustment and the white data acquisition by the conveyance reading unit 6 have not been completed yet, the process waits until the light amount adjustment and the white data acquisition are completed (step S210: NO). On the other hand, if it is determined that the light amount adjustment and white data acquisition by the transport reading unit 6 have been completed (step S210: YES), the CPU 20 controls the interrupt signal generation unit 29 to increase the frequency of the interrupt signal Sw. (Step S215). Then, the CPU 20 rotates the motor 31 by a predetermined step to move the moving reading unit 7 from the position facing the white tape 55A toward the ADF reading position RP (an example of moving processing) (step S220).

  Next, the CPU 20 controls the interrupt signal generation unit 29 to return the frequency of the interrupt signal Sw to the original frequency (step S225). Thereafter, the CPU 20 executes the processing from step S120 to step S165 as in the first embodiment. At that time, the process of step S150 is omitted.

<Effect of Example 2>
When the correction data is acquired at the reading timing corresponding to the high resolution, the moving speed of the carriage 8 is slower than that corresponding to the low resolution as a result of the high resolution, that is, the high resolution. For example, when the correction data is acquired, the frequency of the interrupt signal Sw that is a timing signal is lowered, and the completion of the movement process tends to be delayed. Therefore, correction data acquisition processing (step S205) by the transport reading unit 6 and carriage 8 movement processing (step S220) are executed separately. Then, by increasing the frequency of the interrupt signal Sw in the moving process, the moving speed of the carriage 8 in the moving process is not affected by the interrupt signal Sw when the conveyance reading unit 6 acquires correction data. Therefore, it is possible to suppress the start of conveyance reading from being delayed.

5-3. Example 3
Next, with reference to FIG. 10, a third embodiment of the scan function process will be described. In the first embodiment, after the movement process (step S115) and after the switching operation is completed (step S135), a determination process (step S150) is performed to determine whether or not the conveyance correction data acquisition process is completed. In the third embodiment, an example in which the determination process is executed immediately after the movement process (step S115) and before the switching operation is started will be described. The same processes as those in the first embodiment are denoted by the same step numbers, and the description thereof is omitted.

  That is, as illustrated in FIG. 10, in Example 3, the CPU 20 starts the light amount adjustment and white data acquisition (an example of the conveyance correction data acquisition process) by the conveyance reading unit 6 in step S <b> 115 and the motor 31. The moving reading unit 7 is moved by a predetermined step from the position facing the white tape 55A toward the ADF reading position RP (an example of a moving process) (step S115). Next, the CPU 20 determines whether or not the light amount adjustment and the white data acquisition by the transport reading unit 6 have been completed (step S305: an example of determination processing).

  When it is determined that the light amount adjustment and the white data acquisition by the conveyance reading unit 6 have not been completed yet, the process waits until the light amount adjustment and the white data acquisition are completed (step S305: NO). On the other hand, if it is determined that the light amount adjustment and white data acquisition by the transport reading unit 6 have been completed (step S305: YES), the CPU 20 switches the planetary gear 17 from the FB side position to the ADF side position (switching process). An example) is started (step S120). Thereafter, the CPU 20 executes the processing from step S125 to step S165 as in the first embodiment. At that time, the process of step S150 is omitted.

<Effect of Example 3>
As described above, in the third embodiment, the CPU 20 executes the determination process (step S305) for determining whether or not the conveyance correction data acquisition process is completed immediately after the movement process (step S115). If it is determined in the determination process that the conveyance correction data acquisition process has been completed, a switching process is executed.

  When the correction data is acquired by the transport reading unit 6, a new document is drawn into the transport path 4 by the switching process of the planetary gear 17, and the transport reading unit 6 may acquire the correction data from the document. For this reason, as in the third embodiment, the transfer reading unit 6 starts from the original by performing a switching process after the acquisition of correction data by the transfer reading unit 6 is completed so that a new original is not drawn into the transfer path. Acquisition of correction data can be suppressed.

6). Effects of the Embodiment In the present embodiment, as described above, the CPU 20 switches the planetary gear 17 from the FB side position to the ADF side position during ADF reading (step S135). Then, a reading process (step S155) is performed in which the conveyance reading unit 6 and the moving reading unit 7 in a state facing the document conveyed by the conveyance unit 44 read the document conveyed by the conveyance unit 44. Run. For this reason, in the configuration in which the planetary gear 17 is switched between the ADF side position and the FB side position, both sides of the document can be read by the reading units 6 and 7 in one transport at the time of ADF reading.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the configuration of the image reading apparatus that switches between the ADF side position and the FB side position for the planetary gear 17, the CPU 20 is simply in a position facing the document conveyed by the conveying unit 44 during ADF reading. A configuration may be adopted in which a reading process is performed in which the transport reading unit 6 and the moving reading unit 7 read the document transported by the transport unit 44. In this case, in the configuration in which the planetary gear 17 is switched between the ADF side position and the FB side position, both sides of the document can be read by the reading units 6 and 7 in one transport at the time of ADF reading.

  (2) In the above embodiment, an example is shown in which the upstream surface processing and the downstream surface processing are performed based on the common interrupt signal Sw by the common signal line, but the present invention is not limited to this. The present invention can also be applied to the case where, for example, the upstream surface processing and the downstream surface processing are performed based on individual interrupt signals Sw by individual signal lines.

  (3) In the above-described embodiment, the example in which the sun gear 15 and the planetary gear 17 in the planetary gear mechanism are used as the motor-side transmission gear and the switching gear is shown, but the present invention is not limited thereto. A gear different from the sun gear is used as the motor-side transmission gear, and the FB-side position connecting the motor-side transmission gear and the FB-side transmission gear 21, the motor-side transmission gear, and the ADF-side transmission gear 23 as the switching gear. Other configurations that switch to the ADF side position that connects the two may be used.

  (4) In the above-described embodiment, the CPU 20 is shown as an example of the motor control unit and the determination unit, but is not limited thereto. For example, the motor control unit and the determination unit may be configured by a plurality of circuits including an ASIC, or may be configured by a CPU and other individual circuits.

DESCRIPTION OF SYMBOLS 1 ... Image reading device, 6 ... Conveyance reading part, 7 ... Movement reading part, 8 ... Carriage, 15 ... Sun gear, 16 ... 1st spring, 17 ... Planetary gear, 20 ... CPU, 21 ... FB side transmission gear, 23 ... ADF side transmission gear, 29 ... interrupt signal generator, 31 ... motor, 40 ... ADF device, 44 ... conveyor, 47 ... front sensor, 48 ... rear sensor, 49 ... original sensor, 55A ... white tape

Claims (7)

A transport unit that transports a document along a transport path;
A conveyance reading unit that reads an image of the document conveyed by the conveyance unit;
A carriage that moves in a predetermined direction;
A moving reading unit that reads an image of a surface that is different from a surface that is read by the conveyance reading unit with respect to the document that is held by the carriage and conveyed by the conveyance unit;
A motor,
A motor-side transmission gear for transmitting power supplied by the motor;
A conveyance unit-side transmission gear configured to transmit the power to the conveyance unit at the time of conveyance reading in which the image of the original document conveyed by the conveyance unit is read by the reading unit;
A carriage-side transmission gear that transmits the power to the carriage when moving and reading the original image by the reading unit by moving the carriage;
During the conveyance reading, the motor side transmission gear meshes with the conveyance unit side transmission gear at a conveyance unit side position connecting the motor side transmission gear and the conveyance unit side transmission gear. And a switching gear that switches so as to mesh with the carriage-side transmission gear at a carriage-side position that connects the carriage-side transmission gear.
A control unit,
The controller is
At the time of the conveyance reading, the conveyance reading unit and the moving reading unit in a state facing the document conveyed by the conveyance unit read the document conveyed by the conveyance unit. An image reading apparatus that executes a reading process. The image reading apparatus according to claim 1,
The controller is
A conveyance correction data acquisition process for acquiring correction data for correcting an image of a document read by the conveyance reading unit;
A movement process for moving the carriage to a position facing the document conveyed by the conveyance unit when executing the conveyance correction data acquisition process;
An image reading apparatus that executes a switching process for switching the switching gear from the carriage side position to the transport unit side position after the movement process. The image reading apparatus according to claim 1,
The controller is
A conveyance correction data acquisition process for acquiring correction data for correcting an image of a document read by the conveyance reading unit;
A movement process for moving the carriage to a position facing the document conveyed by the conveyance unit after executing the conveyance correction data acquisition process;
After the movement process, a switching process for switching the switching gear from the carriage side position to the transport unit side position is performed.
The image reading apparatus
A signal generation unit that generates a timing signal commonly used in the conveyance correction data acquisition process and the movement process;
The controller is
Timing processing for controlling generation of the timing signal by the signal generation unit;
A setting determination process for determining whether the reading setting is set to high resolution, and
When determining that the high resolution is set in the setting determination process,
An image reading apparatus that executes the movement process by changing the frequency of the timing signal by the timing process after executing the conveyance correction data acquisition process. The image reading apparatus according to claim 3.
The controller is
In the case where it is determined that the high resolution is not set in the setting determination process, the moving process is executed based on the timing signal generated by the timing process when the conveyance correction data acquisition process is executed. apparatus. In the image reading device according to any one of claims 2 to 4,
Provided upstream of the conveyance reading unit and the moving reading unit in the conveyance path, the document detection unit for detecting the document,
The controller is
Executing document detection processing for detecting the document by the document detection unit;
If the original is detected in the original detection process after the start of the switching process and before the reading of the original,
An image reading apparatus that executes stop processing for stopping driving of the motor. In the image reading device according to any one of claims 2 to 5,
The controller is
Subsequent to the movement process, a determination process for determining whether or not the conveyance correction data acquisition process is completed,
An image reading apparatus that executes the switching process when it is determined in the determination process that the conveyance correction data acquisition process is completed. The image reading apparatus according to any one of claims 2 to 6,
A member to be read provided on a movement path of the carriage;
The controller is
Before the movement process, a movement correction data acquisition process for acquiring correction data for correcting an image of a document read by the movement reading unit is performed by causing the movement reading unit to read the member to be read. An image reading apparatus.

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