Reading apparatus, recording apparatus, and control method

Abstract

To provide a reading apparatus, a recording apparatus, and a control method for improving the handling of a document for which reading operation has been completed.SOLUTION: A scanner 100 includes: a first roller pair comprising a conveyance roller 107 for conveying a document in a Y direction and an upstream pinch roller 108; a reading unit 106 arranged downstream of the first roller pair in the Y direction to read the document; a second roller pair arranged downstream of the reading unit in the Y direction and comprising a paper discharge roller 109 for conveying the document and a downstream pinch roller 110; a discharge port 111 arranged downstream of the second roller pair in the Y direction and discharging the document to the outside of the device; a conveyance motor 113 for driving the roller pairs; a conveyance detection sensor 112 for detecting rotation of the conveyance motor 113; and a control unit configured to stop the document completely read by the reading unit 106 while being held by the second roller pair, and drives, when the conveyance detection sensor 112 detects predetermined rotation of the conveyance motor 113, the second roller pair to discharge the document through the discharge port 111.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a reading device, a recording device, and a control method. [Background technology]

[0002] In general, the scanner section of a multifunction printer (hereafter referred to as MFP) that supports large formats often adopts a sheet-feed method in which the document is transported to a fixed line sensor and read in order to reduce the size of the main body. Small documents read by a sheet-feed scanner are discharged to a document receiving section, but large or long documents may not fit in the document receiving section and may fall outside the device.

[0003] Patent Document 1 discloses a device that stops a part of a document after reading it while it is held by a paper discharge roller according to the length of the document, thereby preventing the document from falling out of the device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-72740 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the configuration of Patent Document 1, after a portion of the document is held by the discharge rollers to prevent the document from falling, when the user retrieves the document, the document needs to be released from its state of being held by the discharge rollers. One method of releasing the document from its held state is to provide a discharge key on the operation panel of the device and have the user press it, but in this case, the user must hold the document with one hand and operate the operation panel with the other, leaving room for improvement in terms of usability.

[0006] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a reading device that can improve the handling of a document after the reading operation has been completed. [Means for solving the problem]

[0007] In order to solve the above problem, the reading device of the present invention is characterized in comprising a first roller pair that transports a document in a first direction, a reading unit arranged downstream of the first rollers in the first direction and reading the document, a second roller pair arranged downstream of the reading unit in the first direction and transporting the document, an outlet arranged downstream of the second roller pair in the first direction and discharging the document outside the device, a motor that drives the second roller pair, a sensor that detects the rotation of the motor, and a control unit that stops the document after the reading operation by the reading unit is completed while it is held by the second roller pair, and when a predetermined rotation of the motor is detected by the sensor, drives the second roller pair to discharge the document from the outlet. Effect of the Invention

[0008] According to the present invention, a reading device is provided that improves the handling of a document after the reading operation has been completed. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a configuration of a scanner according to a first embodiment. [Diagram 2] FIG. 2 is a block diagram for explaining the electrical configuration of the scanner according to the first embodiment. [Diagram 3] 4 is a flowchart illustrating a sequence of operations for reading by the scanner according to the first embodiment. [Figure 4] FIG. 2 is a cross-sectional view showing the state of the scanner and the sensor according to the first embodiment. [Diagram 5] 4A to 4C are diagrams illustrating the relationship between the output of a sensor and a predetermined action by a user according to the first embodiment. [Figure 6] FIG. 13 is a schematic diagram showing the configuration of a scanner according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the present invention, and not all of the combinations of features described in the present embodiment are necessarily essential to the solution of the present invention. Furthermore, the relative arrangements and shapes of the components described in the embodiments are merely examples, and are not intended to limit the scope of the present invention to only those. Note that the following embodiment will be described using a sheet-feed type scanner as an example, but the scope of application of the present invention is not limited to this, and can be applied to other automatic paper transport devices having a similar configuration.

[0011] Incidentally, "recording" includes not only the formation of meaningful information such as characters and figures, but also the formation of images, patterns, designs, etc. on a recording medium, regardless of whether they are meaningful or insignificant, or the processing of the medium, regardless of whether they are manifested in a way that can be perceived by humans visually. In addition, although paper is assumed as the "original" and "recording medium" in this embodiment, they may also be cloth, plastic, film, etc.

[0012] [First embodiment] Fig. 1 is a schematic diagram showing the configuration of an image reading device (hereinafter, scanner) 100 as an example of a paper transport device according to the first embodiment. The scanner 100 of this embodiment is a sheet-feed type that reads an image while transporting a document. Fig. 1(a) is an external perspective view of the scanner 100, and Fig. 1(b) and Fig. 1(c) are schematic cross-sectional views of the scanner 100.

[0013] Scanner 100 has a paper feed port 101 for feeding an original into the device on the front side of the main body (upstream side in the Y direction), and a paper feed tray 102 on which an original can be placed. A user places the leading edge of an original on paper feed tray 102 so that the center of paper feed port 101 in the original width direction (X direction) faces the center of the original in the width direction. The user then inserts the original into paper feed port 101 by sliding it over paper feed tray 102.

[0014] The document inserted into the paper feed port 101 is transported in a horizontal direction (Y direction) as a predetermined transport direction perpendicular to the document width direction (X direction) in the transport path inside the scanner 100. The paper feed port 101 is designed to allow for some degree of positional deviation and tilt when inserted by the user with respect to the width direction length of the document that can be read by the scanner 100. In other words, the paper feed port 101 is designed to be longer in the X direction than the maximum width (maximum length in the X direction) of the document that can be read by the scanner 100. The Z direction indicates the upward direction of gravity that intersects with the X direction and the Y direction (perpendicular in this embodiment).

[0015] The scanner 100 has an operation panel 103 on the top surface of the main body as a display unit composed of physical keys, an LCD panel, etc. A user can set reading conditions and input a document size by operating the operation panel 103.

[0016] Further, a cover 104 is provided on the top surface of the scanner 100. A user can access the inside of the scanner 100 by rotating the cover 104 upward and opening it. This allows the user to perform maintenance on the inside of the scanner 100.

[0017] The front (near) side or front of the main body of scanner 100 is the side that a user faces when operating scanner 100 in normal use. To make it easy for a user facing the front (near) side or front of scanner 100 to perform various operations, paper feed port 101 opens on the front side of the main body, and operation panel 103 is disposed facing the front side of the main body.

[0018] Fig. 1(b) is a cross-sectional view seen from the downstream side in the X direction. In Fig. 1(b), a paper feed port (insertion port, carry-in entrance) 101 is located on the left side, and a paper discharge port (discharge port, carry-out exit) 111 is located on the right side. That is, in the schematic cross-sectional view of Fig. 1(b), the left side of the figure corresponds to the front (nearby) side of the main body or the front side of the main body, and the right side of the figure corresponds to the back side of the main body or the rear side of the main body.

[0019] Fig. 1(c) is a cross-sectional view seen from the upstream side in the X direction. That is, it is a view seen from the opposite side in the X direction to Fig. 1(b), with the left side of the figure corresponding to the rear side of the main body and the right side of the figure corresponding to the front side of the main body. The scanner 100 is often used by being installed above an image recording device (printer) having a recording unit such as a recording head, but the installation method is not limited to a specific one.

[0020] Near the paper feed port 101 and downstream in the transport direction, an original detection sensor 105 is provided to detect that an original has been inserted through the paper feed port 101. The original detection sensor 105 is a reflective optical sensor that irradiates light onto the reading surface of the original inserted into the paper feed port 101 and detects the presence or absence of the original by the reflected light.

[0021] A transport roller 107 and an upstream pinch roller 108 are disposed downstream in the transport direction of the document detection sensor 105 so as to be able to pinch the document. The transport roller 107 is connected to a transport motor 113 via a gear, and the rotation of the transport motor 113 rotates the transport roller 107 and the upstream pinch roller 108, thereby transporting the document in the Y direction.

[0022] Downstream in the transport direction of the transport rollers 107, a line image sensor 106 is disposed as a reading unit. A pressing plate (not shown) is disposed opposite the reading surface of the line image sensor 106, and the pressing plate presses the document against the reading surface of the line image sensor 106 by a biasing means such as a spring. In the scanner 100 of this embodiment, a plurality of small line image sensors 106 (e.g., five) are disposed side by side in the X direction in order to read large-sized documents such as A1, B2, and A2.

[0023] Downstream of the line image sensor 106 in the conveying direction, a discharge roller 109 and a downstream pinch roller 110 are disposed so as to be able to pinch the original. The discharge roller 109 and the downstream pinch roller 110 are also collectively referred to as a downstream roller pair. The discharge roller 109 is connected to the conveying roller 107 via a belt 114, and the discharge roller 109 and the downstream pinch roller 110 rotate by the rotation of the conveying motor 113, and discharge the original to the paper discharge port 111. The discharge roller 109 and the downstream pinch roller 110 of this embodiment can hold (stationary) the original in a pinched state before the discharge to the paper discharge port 111 is completed. At this time, if the conveying roller 107 and the upstream pinch roller 108 are also pinching the original, they hold (stationary) the original in a pinched state.

[0024] That is, the conveying roller 107 and the discharge roller 109 are configured to receive a driving force transmitted from a conveying motor 113 and to rotate in conjunction with each other via a belt 114. Meanwhile, the upstream pinch roller 108 receives a biasing force from a biasing means (e.g., a spring) not shown and is pressed against the conveying roller 107, thereby forming a nip portion for sandwiching and conveying the document between the conveying roller 107 and the upstream pinch roller 108. The conveying roller 107 and the upstream pinch roller 108 are collectively referred to as an upstream roller pair.

[0025] Similarly, the downstream pinch roller 110 is pressed against the discharge roller 109 by the force of a biasing means (e.g., a spring) not shown, thereby forming a nip portion between the discharge roller 109 and the downstream pinch roller 110 for clamping and transporting the original document.

[0026] The upstream pinch roller 108 and the downstream pinch roller 110 rotate following the rotation of the conveying roller 107 and the paper discharge roller 109, respectively. Furthermore, the upstream pinch roller 108 and the downstream pinch roller 110 maintain a stopped state when the conveying roller 107 and the paper discharge roller 109, respectively, are stopped.

[0027] The transport detection sensor 112 is an encoder that detects the rotation of the transport motor 113 and outputs a signal. As described above, the transport motor 113 is mechanically connected to the transport rollers 107 and the discharge rollers 109. Therefore, when the original is moved from the outside while it is nipped (held) between each pair of rollers, the movement causes the transport rollers 107 and the discharge rollers 109 to rotate slightly. The transport detection sensor 112 can detect the movement of the transport motor 113 that accompanies the rotation of the transport rollers 107 and the discharge rollers 109.

[0028] 2 is a block diagram for explaining the electrical configuration of scanner 100. Scanner 100 has a controller board 201 built in as a control unit, which controls each sensor and actuator. A CPU (Central Processing Unit) 202 is mounted on controller board 201. CPU 202 is connected to a power supply unit 203, an IF (Interface) unit 204, a memory 205, a motor driver 206, an AFE (Analog Front End) 207, operation panel 103, each sensor, etc.

[0029] The power supply unit 203 is configured with a circuit that converts externally supplied power into a voltage used to drive the controller board 201 and each sensor and actuator. The IF unit 204 is configured with control circuits such as a LAN (local area network) and a USB (universal serial bus), and connects the CPU 202 to a PC (personal computer) or a network to enable data communication.

[0030] The memory 205 stores programs for driving the CPU 202, and is also used as a buffer for processing image reading data acquired from the line image sensor 106. The memory 205 is also used to hold threshold values ​​for determining in the paper discharge control performed based on the output of the conveyance detection sensor 112.

[0031] The motor driver 206 drives the conveying motor 113, which is a DC motor, and outputs a motor drive signal upon receiving a control signal input from the CPU 202. The AFE 207 converts the analog read signal output from the line image sensor 106 into digital data, and includes circuits the number of which corresponds to the number of the line image sensors 106.

[0032] The operation panel 103 is operated by the user to operate the scanner 100, and is composed of an LCD, a touch panel, physical keys, etc. Menus and notifications are displayed on the LCD, and the user starts a scan operation or changes settings by operating the touch panel. In addition, the operation panel 103 is equipped with physical keys such as a start key, a stop key, and a paper eject key.

[0033] Next, the document discharge process in this embodiment will be described with reference to Fig. 3 to Fig. 5. Fig. 3 is a flow chart explaining a series of steps from when a document is set (fed) in the scanner 100, to reading the document and discharging the document. Fig. 4(a) to Fig. 4(d) are cross-sectional views showing the state of the document 401 in the scanner 100 and the detection state of the transport detection sensor 112. Fig. 5 is a diagram explaining the relationship between the output of the transport detection sensor 112 and the document pulling action (predetermined action) by the user.

[0034] 4(a) to 4(d) are schematic cross-sectional views of the scanner 100 as viewed from upstream in the X direction. When a user wants the scanner 100 to read an original 401, the user needs to set (feed) the original 401 in the scanner 100 in advance, as shown in FIG. 4(a). When the user inserts the original 401 into the feed port 101, the original detection sensor 105 detects the original 401 and sends a signal to the CPU 202.

[0035] The CPU 202 transmits a control signal to the motor driver 206, which rotates the transport motor 113 to rotate the transport roller 107, and transports (pulls) the original 401 downstream in the transport direction (Y direction). When the original 401 reaches the reading start position facing the line image sensor 106, the rotation of the transport motor 113 is stopped, and the transport is stopped. The state of the original 401 shown in FIG. 4(a) is also called a standby state. In this state, the CPU 202 accepts operations on the operation panel 103, and the user operates the operation panel 103 to change the reading settings, etc. Not limited to the operation panel 103, the operation may also be accepted from a host computer, a mobile terminal, or a smartphone by providing a driver.

[0036] While the document 401 is in a standby state, the scanner 100 waits for the user to press a start key (a key instructing reading) on ​​the operation panel 103, and starts a reading operation when the start key is pressed (S301).

[0037] Next, the CPU 202 transmits a control signal to the motor driver 206 to rotate the transport motor 113 to start transporting the original 401 (S302). The transport of the original 401 is accelerated until the leading edge of the original reaches the line image sensor 106, and is controlled so as to maintain a constant transport speed after the original reaches the line image sensor 106, i.e., during reading.

[0038] The CPU 202 calculates the position of the original 401 in the transport direction based on a control signal to the motor driver 206. When the CPU 202 determines that the leading edge of the original 401 has reached the line image sensor 106, it transmits a drive signal to the line image sensor 106 and the AFE 207 to start reading the original 401 (S303). The data output from the line image sensor 106 is converted into a digital value by the AFE 207 and input to the CPU 202. The CPU 202 converts the data input from each line image sensor 106 into one piece of image data, and stores it in the memory 205. The stored image data is read out sequentially from the outside via the IF unit 204.

[0039] While the document 401 is being transported and the reading operation is being performed, the document detection sensor 105 detects the rear end of the document 401 (S304). When the transport of the document 401 continues and the rear end of the document 401 leaves the detection area where the document detection sensor 105 can detect the document 401, the output signal of the document detection sensor 105 changes and the CPU 202 detects the position of the rear end of the document 401.

[0040] The CPU 202 determines the position for ending the reading operation of the original 401 based on the detected rear end position, and when the original 401 reaches that position, it stops the control signals to the line image sensor 106 and the AFE 207, ending the reading operation (S305).

[0041] As shown in FIG. 4B, after the reading operation is completed, the CPU 202 controls the driving of the transport motor 113 so that the rear end of the document 401 stops at a predetermined position (paper discharge waiting position) (S306).

[0042] 4B, the rear end of the original 401 is sandwiched between the discharge roller 109 and the downstream pinch roller 110. Meanwhile, the front end of the original 401 is discharged to the outside through the discharge port 111. The CPU 202 controls the motor driver 206 to energize the conveying motor 113 in order to lock the rotation of the discharge roller 109 so that the original 401 does not fall outside the device under its own weight (S307).

[0043] With the transport of the original 401 stopped and the rotation of the discharge rollers 109 kept locked, the CPU 202 displays an instruction on the operation panel 103 to have the user move the original 401 in a predetermined manner (S308). Note that the instruction in S308 may be displayed not only on the operation panel 103 but also on the screen of a computer, a mobile terminal, a smartphone, or the like connected via a driver.

[0044] Then, the CPU 202 acquires the output of the transport detection sensor 112 (S309). Since the transport detection sensor 112 has a high detection resolution, if the user touches the original 401 without intending to eject the original 401 or if the scanner 100 is shaken, the transport detection sensor 112 may detect a slight rotation of the transport motor 113 and erroneously detect that the user has performed a predetermined action. In response to this, a method for avoiding erroneous detection by the transport detection sensor 112 will be described with reference to FIG. 5.

[0045] 5 is a schematic diagram of the output waveform of the encoder used as the conveyance detection sensor 112. The vertical axis indicates voltage, and the horizontal axis indicates time. In the output of the conveyance detection sensor 112, the CPU 202 can detect the rotation direction of the conveyance motor 113 depending on which of the A-phase and B-phase waveforms of the two-phase output is delayed.

[0046] 4C, the user pulls the document 401 in the discharge direction (downstream in the Y direction). The document 401 is not pulled out because it is nipped between the discharge roller 109 and the downstream pinch roller 110 (the downstream roller pair), whose rotation is locked. However, because the transport roller 107, the discharge roller 109, and the transport motor 113 are mechanically connected by the belt 114, there is play (gap) due to the spring that applies tension to the belt 114.

[0047] Therefore, the user's pulling action causes the transport roller 107 and the discharge roller 109 to rotate slightly in the discharge direction of the original 401. At this time, the mechanically connected transport motor 113 also rotates slightly, so an output such as that shown in Fig. 5(a) is obtained from the transport detection sensor 112. That is, when the transport roller 107 and the discharge roller 109 rotate in the discharge direction of the original 401 (counterclockwise in Fig. 4), a waveform in which the B phase lags behind the A phase is output.

[0048] For example, as shown in Fig. 5(c), when the CPU 202 acquires a predetermined number of consecutive pulses or more, it determines that the user is pulling the document 401 (a predetermined action is being performed). Also, as shown in Fig. 5(d), when the CPU 202 acquires a predetermined number of consecutive pulses in a predetermined period, it can also determine that the user is pulling the document 401 (a predetermined action is being performed).

[0049] Also, if the user pulls the original 401 in the discharge direction (downstream in the Y direction) and then moves the original 401 in the opposite direction to the discharge direction (upstream in the Y direction), the output will be such that phases A and B are folded back in the middle of the waveform as shown in Fig. 5(e). That is, after a waveform in which phase B lags phase A is output, a waveform in which phase A lags phase B is output across the dotted line in Fig. 5(e). This is because the transport rollers 107 and discharge rollers 109 rotate in the opposite direction to the discharge direction of the original 401.

[0050] In this embodiment, when the waveforms shown in Figures 5(c) to 5(e) are output, it is determined that a predetermined operation (operation instructed via operation panel 103) has been performed by the user. CPU 202 determines whether the output waveform of the encoder has been generated by the predetermined operation (S310).

[0051] When the CPU 202 determines that a predetermined operation has been performed, it releases the holding control of the original 401 and performs a discharge operation (control to resume rotation of the discharge rollers 109 and downstream pinch rollers 110) to discharge the original 401 (S311).

[0052] To discharge the original 401, the CPU 202 sends a control signal to the motor driver 206 to rotate the transport motor 113. The rotation of the transport motor 113 rotates the discharge roller 109 and the downstream pinch roller 110, and the rear end of the held original 401 is discharged to the outside of the discharge port 111. When the original 401 is discharged, the user holds both ends of the original 401 with both hands, so that the original 401 can be collected without dropping or bending (S312).

[0053] According to this embodiment, the hold by the downstream roller pair is automatically released due to a change in the state of the original 401, so the user can collect the original 401 by simply pulling the original 401 without operating the operation panel 103, etc. In other words, since the hold can be released without operating the operation panel 103 from a state in which the original 401 is held so as not to fall from the paper discharge port 111 under its own weight, it is possible to prevent damage to the original 401 due to falling or bending, etc., even if the original 401 is large.

[0054] In this embodiment, a configuration has been described in which the transport detection sensor 112 performs detection based on the movement of the transport motor 113, but transport may be detected by another configuration. Figure 6 is a diagram for explaining another embodiment. Figure 6(a) is an external perspective view of the scanner 600, Figure 6(b) is a cross-sectional view seen from the downstream side in the X direction, and Figure 6(c) is a cross-sectional view seen from the upstream side in the X direction.

[0055] 6B and 6C, a transport detection sensor 612 is disposed facing the line image sensor 606. In such a configuration, the transport detection sensor 612 performs detection independent of the movement of the transport motor 613. Therefore, after the reading of the original 401 is completed, in the process of S306 in FIG. 3, the original is transported in the direction opposite to the paper discharge direction to a position where it can be read by the transport detection sensor 612, so that the processes from S307 onwards can be performed in the same manner as in the first embodiment.

[0056] In the above embodiment, the configuration and control of the scanner have been described, but in the case of a multifunction printer (MFP) that is integrated with a printer, the printing operation by the printer unit is performed in parallel with the reading operation of the document. In this case, the signal level detected by the transport detection sensor 112 may be affected by vibrations caused by driving the carriage unit that moves the printer unit and vibrations caused by transporting the document.

[0057] In that case, for example, the period for acquiring the output of the transport detection sensor 112 may be set taking into consideration the fluctuation range of the output due to vibrations associated with the carriage or transport in the printer unit. This makes it possible to prevent the CPU 202 from acquiring the output of the transport detection sensor 112 due to vibrations of the device and erroneously determining that a specific operation has been performed by the user at the time of judgment in S310 of FIG.

[0058] The disclosure of the above-described embodiment includes the following configurations.

[0059] (Configuration 1) a first roller pair for transporting the document in a first direction; a reading unit disposed downstream of the first roller in the first direction and configured to read a document; a second roller pair disposed downstream of the reading unit in the first direction and configured to transport a document; a discharge port disposed downstream of the second roller pair in the first direction and configured to discharge the document outside the device; A motor that drives the second roller pair; A sensor for detecting rotation of the motor; a control unit that stops an original document that has been read by the reading unit while being held by the second roller pair, and when the sensor detects a predetermined rotation of the motor, drives the second roller pair to discharge the original document from the discharge opening.

[0060] (Configuration 2) the sensor is an encoder; 2. The reading device according to claim 1, wherein the control unit, when acquiring a predetermined output of the encoder, drives the second roller pair to discharge the document from the discharge port.

[0061] (Configuration 3) The control unit drives the second roller pair to discharge the document from the discharge port when a first number of consecutive pulses are received from the encoder, and maintains the document held by the second roller pair when a second number of consecutive pulses less than the first number are received.

[0062] (Configuration 4) The reading device according to any one of configurations 1 to 3, characterized in that when the sensor detects that the motor has rotated in a first direction and then in a second direction opposite to the first direction, the control unit drives the second roller pair to discharge the document from the discharge outlet.

[0063] (Configuration 5) The reading device according to any one of configurations 1 to 4, characterized in that the control unit instructs a user to perform a predetermined operation when the document on which the reading operation has been completed by the reading unit is held by the second roller pair.

[0064] (Configuration 6) The reading device according to configuration 5, further comprising a display unit for displaying the instruction.

[0065] (Configuration 7) a first roller pair for transporting the document in a first direction; a reading unit disposed downstream of the first roller in the first direction and configured to read a document; a second roller pair disposed downstream of the reading unit in the first direction and configured to transport a document; a discharge port disposed downstream of the second roller pair in the first direction and configured to discharge the document outside the device; A motor that drives the second roller pair; A sensor for detecting rotation of the motor; a recording unit that records the image read by the reading unit; a control unit that stops an original document that has been read by the reading unit while being held by the second roller pair, and when the sensor detects a predetermined rotation of the motor, drives the second roller pair to discharge the original document from the discharge outlet.

[0066] (Configuration 8) A method for controlling a reading device including a first roller pair that transports a document in a first direction, a reading unit that is disposed downstream of the first rollers in the first direction and that reads the document, a second roller pair that is disposed downstream of the reading unit in the first direction and that transports the document, an outlet that is disposed downstream of the second roller pair in the first direction and that discharges the document to the outside of the device, and a motor that drives the second roller pair, a holding step of holding the document, which has been read by the reading unit, with the second roller pair; a detection step of detecting rotation of the motor; a discharge step of driving the second roller pair to discharge the document from the discharge opening when a predetermined rotation is detected in the detection step. [Explanation of symbols]

[0067] 100 Scanner 106 Line image sensor (reading part) 107 Transport roller 108 Upstream pinch roller 109 Paper ejection roller 110 Downstream pinch roller 111 Paper ejection port (ejection port) 112 Transport detection sensor 113 Transport motor 202 CPU

Claims

1. a first roller pair for transporting a document in a first direction; a reading unit disposed downstream of the first roller in the first direction and configured to read a document; a second roller pair disposed downstream of the reading unit in the first direction and configured to transport a document; a discharge port disposed downstream of the second roller pair in the first direction and configured to discharge the document to the outside of the device; A motor that drives the second roller pair; A sensor for detecting rotation of the motor; a control unit that stops an original document after the reading operation has been completed by the reading unit while held by the second roller pair, and when the sensor detects a predetermined rotation of the motor, drives the second roller pair to discharge the original document from the discharge opening.

2. the sensor is an encoder; 2 . The reading device according to claim 1 , wherein the control unit, when acquiring a predetermined output of the encoder, drives the second roller pair to discharge the document from the discharge port.

3. The reading device according to claim 2, characterized in that the control unit drives the second roller pair to discharge the document from the discharge outlet when a first number of consecutive pulses are obtained from the encoder, and maintains the document held by the second roller pair when a second number of consecutive pulses less than the first number are obtained.

4. The reading device according to claim 1, characterized in that the control unit drives the second pair of rollers to discharge the document from the discharge outlet when the sensor detects that the motor has rotated in a first direction and then in a second direction opposite to the first direction.

5. 2 . The reading device according to claim 1 , wherein the control unit instructs a user to perform a predetermined operation in a state in which the document on which the reading operation by the reading unit has been completed is held by the second roller pair.

6. The reading device according to claim 5 , further comprising a display unit for displaying the instruction.

7. a first roller pair for transporting a document in a first direction; a reading unit disposed downstream of the first roller in the first direction and configured to read a document; a second roller pair disposed downstream of the reading unit in the first direction and configured to transport a document; a discharge port disposed downstream of the second roller pair in the first direction and configured to discharge the document to the outside of the device; A motor that drives the second roller pair; A sensor for detecting rotation of the motor; a recording unit that records the image read by the reading unit; a control unit that stops an original document after the reading operation has been completed by the reading unit while held by the second roller pair, and when the sensor detects a predetermined rotation of the motor, drives the second roller pair to discharge the original document from the discharge outlet.

8. A method for controlling a reading device including a first roller pair that transports a document in a first direction, a reading unit that is disposed downstream of the first rollers in the first direction and that reads the document, a second roller pair that is disposed downstream of the reading unit in the first direction and that transports the document, an outlet that is disposed downstream of the second roller pair in the first direction and that discharges the document to the outside of the device, and a motor that drives the second roller pair, a holding step of holding the document, which has been read by the reading unit, with the second roller pair; a detection step of detecting rotation of the motor; a discharge step of driving the second roller pair to discharge the document from the discharge opening when a predetermined rotation is detected in the detection step.

Images