Medium transport device, control method, and control program

Abstract

To provide a medium transport device which detects a medium, which should be subject to abnormality control, with higher accuracy.SOLUTION: A medium transport device includes: a pick roller which feeds a medium; a separation roller disposed at the downstream side in a transport direction relative to the pick roller; a transport roller disposed at the downstream side in the transport direction relative to the separation roller; a medium sensor which is disposed at the downstream side in the transport direction relative to the separation roller and detects the medium; a lifting sensor which detects lifting of the medium at the upstream side in the transport direction relative to the transport roller; a passage sensor which is disposed at the upstream side in the transport direction relative to the separation roller and detects the medium passing therethrough; a determination unit which determines that the medium is a predetermined medium if lifting of the medium is detected by the lifting sensor and passage of the medium is detected by the passage sensor in a predetermined period since the medium was detected by the medium sensor; and a control unit which executes abnormality control if it is determined that the medium is the predetermined medium.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a medium conveying device, a control method, and a control program. [Background technology]

[0002] Generally, a media conveying device such as a scanner that conveys media and captures images conveys multiple media stacked on a mounting table while sequentially separating the multiple media. However, if multiple media are bound with staples or the like, the media may be damaged when separating the media. Therefore, it is required for the media conveying device to appropriately detect such bound media and perform abnormality control such as stopping conveyance.

[0003] Patent Document 1 discloses an image reading device that includes a height detection sensor that detects the height of a document surface, and a document surface detection sensor that is disposed upstream of the height detection sensor and faces a different direction from the height detection sensor. The image reading device of Patent Document 1 determines that a bound document is being fed when the height of the document surface detected by the height detection sensor exceeds a threshold value, or when the document floats and is detected by the document surface detection sensor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-83563 A Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for a medium conveying device to detect with high accuracy media, such as bound media, that require abnormality control due to reasons such as problems with separation.

[0006] An object of the present invention is to provide a medium conveying device, a control method, and a control program that enable more accurate detection of a medium for which abnormality control should be performed. [Means for solving the problem]

[0007] A medium transport device according to an embodiment of the present invention includes a pick roller for feeding a medium, a separation roller arranged downstream of the pick roller in the transport direction of the medium, a transport roller arranged downstream of the separation roller in the transport direction, a media sensor arranged downstream of the separation roller in the transport direction and detecting the medium, a lift sensor for detecting the lifting of the medium upstream of the transport roller in the transport direction, a passage sensor arranged upstream of the separation roller in the transport direction and detecting the passage of the medium, a determination unit for determining that the medium is a specified medium when the lifting sensor detects the lifting of the medium and the passage sensor detects the passage of the medium within a specified period after the medium is detected by the media sensor, and a control unit for executing abnormal control when the medium is determined to be the specified medium.

[0008] A control method according to an embodiment of the present invention is a control method for a media conveying device having a pick roller that feeds a medium, a separation roller arranged downstream of the pick roller in the media conveying direction, a conveying roller arranged downstream of the separation roller in the conveying direction, a media sensor arranged downstream of the separation roller in the conveying direction and detecting the medium, a lift sensor that detects the lifting of the medium upstream of the conveying roller in the conveying direction, and a passing sensor arranged upstream of the separation roller in the conveying direction and detecting the passage of the medium, and includes determining that the medium is a specified medium when the lifting sensor detects the medium being lifted and the passing sensor detects the medium being passed within a specified period after the medium is detected by the media sensor, and performing abnormal control when the medium is determined to be the specified medium.

[0009] A control program according to an embodiment of the present invention is a control program for a medium conveying device having a pick roller for feeding a medium, a separation roller arranged downstream of the pick roller in the conveying direction of the medium, a conveying roller arranged downstream of the separation roller in the conveying direction, a media sensor arranged downstream of the separation roller in the conveying direction and detecting the medium, a lift sensor that detects the lifting of the medium upstream of the conveying roller in the conveying direction, and a passing sensor arranged upstream of the separation roller in the conveying direction and detecting the passage of the medium, and if the lifting of the medium is detected by the lift sensor and the passing sensor detects the passage of the medium within a predetermined period after the medium is detected by the media sensor, the control program causes the medium conveying device to determine that the medium is a specified medium, and to execute abnormal control if the medium is determined to be a specified medium. Effect of the Invention

[0010] The medium conveying device, the control method, and the control program according to the present invention make it possible to detect with high accuracy a medium for which abnormal control should be performed. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view of the medium conveying device 100. [Diagram 2] 2 is a diagram showing a transport path inside the medium transport device 100. FIG. [Diagram 3] FIG. 2 is a perspective view of the floating sensor 113. [Figure 4] 11 is a diagram showing a schematic arrangement of a floating sensor 113 and a second medium sensor 116. FIG. [Diagram 5] 1 is a functional block diagram of a medium conveying device 100. FIG. [Figure 6] FIG. 1 is a functional block diagram of a memory device 140 and a processing circuit 150. [Figure 7] FIG. 11 is a flowchart showing the flow of a medium transport process. [Figure 8] FIG. 11 is a flowchart showing the flow of judgment imaging processing. [Figure 9] 1A is a schematic diagram of a binding medium viewed from the side, and FIG. 1B is a schematic diagram of a binding medium viewed from above. [Figure 10] 1A is a schematic diagram of a normal medium viewed from the side, and FIG. 1B is a schematic diagram of a bound medium viewed from the side. [Figure 11] 1A is a schematic side view of a small-sized trailing end curl medium, and FIG. 1B is a schematic side view of a normal-sized trailing end curl medium. [Figure 12] 2 is a diagram showing a transport path inside the medium transport device 200. FIG. [Figure 13] 2 is a schematic diagram showing the configuration of a floating sensor 213. FIG. [Figure 14] 2 is a diagram showing a transport path inside the medium transport device 300. FIG. [Figure 15] 13 is a schematic diagram showing the configuration of a floating sensor 313. FIG. [Figure 16] FIG. 4 is a functional block diagram of a processing circuit 450. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the inventions described in the claims and their equivalents.

[0013] FIG. 1 is a perspective view showing a medium conveying device 100 according to an embodiment. The medium conveying device 100 is an image scanner. The medium conveying device 100 conveys a medium, which is an original document, and captures an image of the medium. The medium is paper, cardboard, card, or the like. The medium conveying device 100 may be a facsimile, a copier, a multifunction printer (MFP, Multifunction Peripheral), or the like. The medium conveying device 100 may also be a printer or the like that conveys a medium, which is an object to be printed.

[0014] 1, arrow A1 indicates the substantially vertical direction (height direction), arrow A2 indicates the medium transport direction, arrow A3 indicates the medium discharge direction, and arrow A4 indicates the width direction perpendicular to the transport direction A2 or discharge direction A3. In the following, upstream refers to the upstream of the transport direction A2 or discharge direction A3, and downstream refers to the downstream of the transport direction A2 or discharge direction A3.

[0015] The medium conveying device 100 includes a first housing 101, a second housing 102, a placement table 103, a discharge table 104, an operation device 105, a display device 106, and the like.

[0016] The first housing 101 and the second housing 102 are examples of housings. The second housing 102 is disposed inside the first housing 101 and rotatably engaged with the first housing 101 by a hinge so as to be openable and closable when a jam occurs or when cleaning the inside of the medium conveying device 100.

[0017] Mounting table 103 engages with first housing 101 so that media to be transported can be placed thereon. Mounting table 103 is provided on a side surface of first housing 101. Mounting table 103 is movable in height direction A1, and is located at the bottom end of the first housing so that media can be easily placed thereon when media is not being transported, and when media is being transported, it rises to a position where the uppermost medium placed on the top side comes into contact with a pick roller, which will be described later.

[0018] The discharge tray 104 is formed on the upper surface of the second housing 102. The discharge tray 104 has a placement surface for placing media thereon, and the media discharged from the discharge ports of the first housing 101 and the second housing 102 are placed thereon.

[0019] The operation device 105 has an input device such as a button and an interface circuit that acquires a signal from the input device. The operation equipment 105 accepts an input operation by a user and outputs an operation signal according to the user's input operation. The display device 106 has a display including a liquid crystal, an organic EL (Electro-Luminescence), or the like, and an interface circuit that outputs image data to the display. The display device 106 displays image data on the display. The display device 106 may be a liquid crystal display with a touch panel function. In this case, the operation device 105 has an interface circuit that acquires an input signal from the touch panel.

[0020] FIG. 2 is a diagram showing a transport path inside the medium transport device 100. As shown in FIG.

[0021] The medium conveying device 100 has, on its internal conveying path, a first medium sensor 110, a passing sensor 111, a pick roller 112, a lifting sensor 113, a feed roller 114, a separation roller 115, a second medium sensor 116, first to fifth conveying rollers 117a-e, first to fifth driven rollers 118a-e, and an imaging device 119, etc.

[0022] The number of each of the pick roller 112, the feed roller 114, the separation roller 115, the first to fifth conveyor rollers 117a-e, and / or the first to fifth driven rollers 118a-e is not limited to one, and may be more than one. In this case, the multiple pick rollers 112, the feed roller 114, the separation roller 115, the first to fifth conveyor rollers 117a-e, and / or the first to fifth driven rollers 118a-e are arranged at intervals in the width direction A4.

[0023] The surface of first housing 101 facing second housing 102 forms first guide 101a of the medium transport path, and the surface of second housing 102 facing first housing 101 forms second guide 102a of the transport path.

[0024] The first medium sensor 110 is disposed on the mounting table 103, which is upstream of the feed roller 114 and the separation roller 115, and detects whether or not a medium is placed on the mounting table 103. The first medium sensor 110 detects whether or not a medium is placed on the mounting table 103 by using a contact detection sensor that passes a predetermined current when the medium is in contact or not in contact. The first medium sensor 110 generates and outputs a first medium signal having a different signal value depending on whether or not a medium is placed on the mounting table 103. Note that the first medium sensor 110 may be any other sensor capable of detecting whether or not a medium is placed on the mounting table 103, such as a light detection sensor.

[0025] The passage sensor 111 is disposed upstream of the separation roller 115 of the second housing 102 in the conveying direction A2, and detects that the medium is passing through. In the example shown in FIG. 2, the passage sensor 111 is disposed upstream of the pick roller 112. The passage sensor 111 is, for example, a slit-type encoder. In this case, the passage sensor 111 includes a rotating member having a slit and rotating as the medium passes through, an LED (Light Emitting Diode), and a photodiode. A light pulse is generated when the light emitted from the LED passes through the rotating slit. The passage sensor 111 generates and outputs a signal corresponding to the width or interval of the light pulse detected by the photodiode, that is, a signal corresponding to the moving speed of the medium, as a passing signal. For example, the passage sensor 111 detects that the medium is passing through when the moving speed of the medium indicated by the passing signal is equal to or higher than a threshold value. The passage sensor 111 may be a magnetic encoder that detects a change in magnetism caused by the rotation of a rotating member having a magnet.

[0026] Pick roller 112 is disposed in second housing 102. Pick roller 112 comes into contact with a medium placed on placement table 103 that has been raised to approximately the same height as the medium transport path, and feeds the medium downstream.

[0027] Floating sensor 113 is disposed inside second housing 102 and downstream of pick roller 112. Floating sensor 113 detects floating of the medium fed by pick roller 112. Floating of the medium refers to the fed medium curving toward second housing 102 with respect to the transport path. Floating sensor 113 detects floating of the medium by generating and outputting a floating signal having a different signal value depending on whether the medium is floating or not. The configuration of floating sensor 113 will be described later with reference to FIG. 3.

[0028] The feed roller 114 is disposed inside the second housing 102 and downstream of the pick roller 112. The feed roller 114 feeds the medium fed by the pick roller 112 further downstream. The separation roller 115 is disposed inside the first housing 101 so as to face the feed roller 114. The separation roller 115 is a so-called brake roller or retard roller, and can rotate in the opposite direction to the direction in which the medium is fed, or can be stopped. The feed roller 114 and the separation roller 115 separate the medium and feed it one by one. The feed roller 114 is disposed above the separation roller 115, and the medium conveying device 100 feeds the medium by a so-called top-down method. The feed roller 114 may be disposed below the separation roller 115, and the medium conveying device 100 may feed the medium by a so-called bottom-up method.

[0029] The second medium sensor 116 is disposed downstream of the feed roller 114 and the separation roller 115. The second medium sensor 116 detects the medium. The second medium sensor 116 is a regression type prism sensor, and includes an LED (Light Emitting Diode) and a photodiode disposed inside the first housing 101, and a prism disposed inside the second housing 102. The prism faces the LED and the photodiode across the medium transport path, and is disposed so as to guide the light irradiated from the LED to the photodiode. The second medium sensor 116 generates and outputs a signal having a signal value according to the intensity of the light detected by the photodiode, that is, a signal having a different signal value depending on whether the light irradiated from the LED is blocked by the medium or not, as a second medium signal. For example, the second medium sensor 116 detects the medium when the second medium signal indicates that the light irradiated from the LED is blocked by the medium. The second medium sensor 116 may be any other sensor capable of detecting the medium, such as a light detection sensor.

[0030] The first to fifth conveying rollers 117a-e and the first to fifth driven rollers 118a-e are provided facing each other downstream of the feeding roller 114 and the separation roller 115. The first to fourth conveying rollers 117a-d and the first to fourth driven rollers 118a-d convey the medium fed by the feeding roller 114 and the separation roller 115 downstream. The fifth conveying roller 117e and the fifth driven roller 118e discharge the medium conveyed by the first to fourth conveying rollers 117a-d and the first to fourth driven rollers 118a-d onto the discharge tray 104.

[0031] The imaging device 119 is disposed downstream of the first transport roller 117a in the transport direction A2, and captures an image of the medium transported by the first transport roller 117a and the first driven roller 118a. The imaging device 119 has a first imaging device 119a and a second imaging device 119b disposed opposite each other across the transport path of the medium. The first imaging device 119a and the second imaging device 119b are examples of an imaging section.

[0032] The first imaging device 119a has a line sensor using a CIS (Contact Image Sensor) of a life-size optical system type having imaging elements using CMOS (Complementary Metal Oxide Semiconductor) linearly arranged in the main scanning direction. The first imaging device 119a also has a lens that forms an image on the imaging elements, and an A / D converter that amplifies and analog-to-digital (A / D) converts the electrical signal output from the imaging elements. The first imaging device 119a captures an image of the surface of the medium being transported, generates an input image, and outputs it.

[0033] Similarly, the second imaging device 119b has a line sensor using a CIS of a life-size optical system type having CMOS imaging elements arranged in a line in the main scanning direction. The second imaging device 119b also has a lens that forms an image on the imaging element, and an A / D converter that amplifies and analog-to-digital (A / D) converts the electrical signal output from the imaging element. The second imaging device 119b captures an image of the back side of the medium being transported, generates an input image, and outputs it.

[0034] The imaging device 119 may include only one of the first imaging device 119a and the second imaging device 119b and may read only one side of the medium. The first imaging device 119a and the second imaging device 119b may include a CIS line sensor of an equal-magnification optical system type having an imaging element based on a CCD (Charge Coupled Device) instead of a CIS line sensor of an equal-magnification optical system type having an imaging element based on a CMOS. The first imaging device 119a and the second imaging device 119b may include a line sensor of a reduction optical system type having an imaging element based on a CMOS or CCD.

[0035] The medium placed on the placement table 103 is transported between the first guide 101a and the second guide 102a along the transport direction A2 by the rotation of the pick roller 112 and the feed roller 114 in the direction in which the medium is fed. The user can set the feeding mode of the medium transport device 100 to either a separation mode in which the medium is separated while being fed, or a non-separation mode in which the medium is fed without being separated. The feeding mode is set by the user operating the operation device 105 or an information processing device that is communicatively connected to the medium transport device 100. When the feeding mode is set to the separation mode, the separation roller 115 rotates in the opposite direction to the feeding direction of the medium or stops. This limits the feeding of media other than the separated medium, and prevents double feeding. On the other hand, when the feeding mode is set to the non-separation mode, the separation roller 115 rotates in the feeding direction of the medium.

[0036] The medium is transported between first guide 101a and second guide 102a by first transport roller 117a rotating in the direction in which the medium is fed, and is sent to the imaging position of imaging device 119, where it is imaged by imaging device 119. Furthermore, the medium is discharged onto discharge tray 104 by second to fifth transport rollers 117b to e each rotating in the direction in which the medium is fed.

[0037] 3 is a perspective view of the floating sensor 113. The floating sensor 113 has an arm 113a and a horseshoe-shaped sensor 113b.

[0038] The arm 113a is provided above the medium transport path so as to extend in the medium transport direction A2, and is disposed so that its lower surface faces the first guide 101a at a predetermined distance. A plurality of lift sensors 113 may be disposed at intervals in the width direction A4. In this case, each arm 113a is disposed so as to have the same height relative to the first guide 101a. The downstream end 113c of the arm 113a is rotatably engaged with the second housing 102 so that the upstream end 113d swings. As a result, when the medium is lifted, the medium comes into contact with the arm 113a, and the medium rotates the arm 113a to raise it. When the medium is not lifted, the distance between the lower surface of the arm 113a and the first guide 101a is appropriately set according to the magnitude of the bending of the medium that needs to be detected by the lift sensor 113.

[0039] The horseshoe-shaped sensor 113b has a light-emitting element 113e, a light-receiving element 113f, and a connection portion 113g that connects the light-emitting element 113e and the light-receiving element 113f. The light-emitting element 113e and the light-receiving element 113f are arranged to face each other. The light-emitting element 113e is an LED or the like, and emits light toward the light-receiving element 113f. The light-receiving element 113f is a photodiode or the like. The light-emitting element 113e and the light-receiving element 113f are examples of a light-emitting unit and a light-receiving unit, respectively. The light-receiving element 113f is provided facing the light-emitting element 113e across the arm 113a, and detects light from the light-emitting element 113e. The light-receiving element 113f generates and outputs a lift-up detection signal, which is an electric signal according to the intensity of the detected light. The horseshoe-shaped sensor 113b is an example of a detector.

[0040] The arm 113a is disposed between the light emitting element 113e and the light receiving element 113f in the initial state, and is disposed in a position not facing the light emitting element 113e and the light receiving element 113f in the raised state. That is, the arm 113a is formed so as to block light from the light emitting element 113e to the light receiving element 113f in the not raised state, and to allow light from the light emitting element 113e to pass to the light receiving element 113f in the raised state. The horseshoe sensor 113b generates a signal having a signal value according to the intensity of light detected by the light receiving element 113f as a lifting signal, that is, a signal having a different signal value when the medium being fed is lifted and when it is not lifted. For example, the lifting sensor 113 detects the lifting of the medium when the intensity of light detected by the light receiving element 113f, which is indicated by the lifting signal, is equal to or greater than a threshold value.

[0041] Fig. 4 is a diagram showing a schematic arrangement of the floating sensor 113 and the second medium sensor 116. Fig. 4 is a schematic diagram showing the positional relationship between the floating sensor 113 and the second medium sensor 116 when the transport path is viewed from above.

[0042] 4, two floating sensors 113 are disposed on the outer side in the width direction A4 of the pick roller 112 and the feed roller 114. The configurations of the two floating sensors 113 are the same except that they are symmetrical with respect to the width direction A4. The number of floating sensors 113 is not limited to two, and may be one or three or more.

[0043] The lift sensor 113 is disposed at a predetermined distance in the width direction A4 from the pick roller 112 and the feed roller 114. The predetermined distance is set so that when a medium (e.g., A5 size) having the smallest length in the width direction A4 among media that are generally likely to be bound with staples, clips, or the like is transported through the center in the width direction A4, the end of the medium in the width direction A4 passes under the arm 113a. This allows the lift sensor 113 to reliably detect the lift of a medium when bound media bound with staples, clips, or the like is transported.

[0044] An upstream end 113d of arm 113a of lift sensor 113 is located upstream of the upstream end of roller nip 112a of pick roller 112. In addition, a downstream end 113c of arm 113a of lift sensor 113 is located downstream of the downstream end of roller nip 114a of feed roller 114 and separation roller 115. In this way, lift sensor 113 detects lifting of the medium between the upstream end of roller nip 112a of pick roller 112 and the downstream end of roller nip 114a of feed roller 114 and separation roller 115.

[0045] The second medium sensor 116 is disposed downstream of the separation roller 115. The second medium sensor 116 is disposed between the two separation rollers 115, for example, at the center in the width direction A4. Note that a plurality of second medium sensors 116 may be disposed side by side at intervals along the width direction A4.

[0046] 5 is a block diagram showing an example of a schematic configuration of the medium conveying device 100. The medium conveying device 100 further includes a motor 131, an interface device 132, a storage device 140, a processing circuit 150, and the like, in addition to the above-mentioned configuration.

[0047] The motor 131 includes one or more motors. The motor 131 rotates the pick roller 112, the feed roller 114, the separation roller 115, and the first to fifth transport rollers 117a-e in response to a control pulse from the processing circuit 150 to feed and transport the medium. Note that the first to fifth driven rollers 118a-e may be rotated by the motor 131, rather than being driven by the rotation of each transport roller.

[0048] The interface device 132 has an interface circuit conforming to a serial bus such as USB. The interface device 132 is electrically connected to an information processing device (not shown) (for example, a personal computer, a mobile information terminal, etc.) to transmit and receive an input image and various information. Instead of the interface device 132, the medium conveying device 100 may include a communication unit having an antenna for transmitting and receiving wireless signals and a communication interface circuit for transmitting and receiving signals through a wireless communication line. The communication protocol used by the communication interface circuit is, for example, a wireless LAN (Local Area Network).

[0049] The storage device 140 includes a memory device such as a RAM (Random Access Memory) or a ROM (Read Only Memory), a fixed disk device such as a hard disk, or a portable storage device such as a flexible disk or an optical disk. The storage device 140 also stores computer programs, databases, tables, and the like used for various processes of the medium conveying device 100. The computer programs may be installed in the storage device 140 from a computer-readable and non-transitory portable recording medium using a known setup program or the like. The portable recording medium is, for example, a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), or the like.

[0050] The processing circuit 150 operates based on a program stored in advance in the storage device 140. The processing circuit 150 is, for example, a CPU (Central Processing Unit). The processing circuit 150 may be a DSP (Digital Signal Processor), an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or the like.

[0051] The processing circuit 150 is connected to the operation device 105, the display device 106, the first medium sensor 110, the passing sensor 111, the lifting sensor 113, the second medium sensor 116, the imaging device 119, the motor 131, the interface device 132, the storage device 140, and the like, and controls each of these components. The processing circuit 150 controls the motor 131 to transport the medium, controls the imaging device 119 to obtain an input image, and transmits the obtained input image to the information processing device via the interface device 132. The processing circuit 150 also determines whether the transported medium is a bound medium based on the passing signal received from the passing sensor 111, the lifting detection signal received from the lifting sensor 113, and the second medium signal received from the second medium sensor 116.

[0052] FIG. 6 is a diagram showing a schematic configuration of the storage device 140 and the processing circuit 150. As shown in FIG.

[0053] The storage device 140 stores various programs such as a control program 141 and a determination program 142. Each of these programs is a functional module implemented by software that runs on a processor. The processing circuit 150 reads each of the programs stored in the storage device 140 and operates according to the read programs, thereby functioning as a control unit 151 and a determination unit 152.

[0054] 7 is a flow diagram showing the operation flow of the medium conveying process executed by the medium conveying device 100. The medium conveying process is realized by the processing circuit 150 cooperating with each element of the medium conveying device 100 based on a program stored in the storage device 140.

[0055] First, the control unit 151 waits until it receives an operation signal instructing to read a medium (S101). The operation signal is supplied from the operation device 105 to the control unit 151 in response to a user inputting an instruction to read a medium to the operation device 105. The operation signal may be supplied from the information processing device via the interface device 132 in response to a user inputting an instruction to read to the information processing device.

[0056] Next, control unit 151 determines whether or not a medium is placed on placement table 103 based on the first medium signal output from first medium sensor 110 (S102). If no medium is placed on placement table 103 (S102-No), the medium imaging process ends.

[0057] If a medium is placed on the table 103 (S102-Yes), the control unit 151 drives a motor for moving the table 103, and raises the table 103 to a position where the medium can be fed. The control unit 151 drives the motor 131 to rotate the pick roller 112, the feed roller 114, the separation roller 115, and the first to fifth transport rollers 117a-e, and feeds and transports the medium placed on the table 103 (S103).

[0058] Next, control unit 151 determines whether or not a medium has been detected by second medium sensor 116 based on the second medium signal output from second medium sensor 116 (S104). When the second medium signal indicates that the light irradiated from the LED has been blocked by the medium, control unit 151 determines that the leading edge of the medium has reached the position of second medium sensor 116 and the medium has been detected by second medium sensor 116. When the medium has not been detected by second medium sensor 116 (S104-No), control unit 151 returns to S104 and waits until the medium is detected by second medium sensor 116.

[0059] If the medium is detected by the second medium sensor 116 (S104-Yes), the determination unit 152 executes a determination process of imaging the medium while determining whether the medium is a bound medium (S105). The details of the determination process will be described later.

[0060] Next, the control unit 151 determines whether or not the transport of the medium has stopped at the time when the determination process is completed (S106). If the transport of the medium has stopped (S106-Yes), the medium transport process is completed.

[0061] If the medium transport continues (S106-No), and if the control unit 151 determines that a medium is placed on the placement table 103 based on the first medium signal output from the first medium sensor 110 (S107-Yes), the medium transport process returns to S104, and the control unit 151 waits until the next medium is detected by the second medium sensor 116. If no medium is placed (S107-No), the control unit 151 stops the motor 131 and ends the medium transport process.

[0062] FIG. 8 is a flow diagram showing the flow of the determination process executed by the medium conveying device 100 in S105 of the medium conveying process. In the determination process, it is determined whether the medium is a bound medium, a small trailing end curl medium, or another medium. If the medium is determined to be a bound medium, conveyance is stopped in response to a user's operation, and if the medium is determined to be a medium other than a bound medium, conveyance is continued. Note that a small medium refers to a medium (e.g., A5 size) whose width in the medium conveying direction A2 is smaller than that of a standard-sized medium (e.g., A4 size). Also, a trailing end curl medium refers to a medium whose upstream end is bent toward the second housing 102. The trailing end curl medium includes a medium whose upstream end is curved toward the second housing 102 as well as a medium whose upstream end is bent toward the second housing 102.

[0063] In the determination process, whether the medium is a bound medium is continuously determined during a determination period from when the leading edge of the medium reaches the second medium sensor 116 until the medium is transported a predetermined distance. Furthermore, if the leading edge of the medium reaches the imaging start position before the determination period ends, the medium is imaged in parallel with the determination. The predetermined distance is set to be longer than the distance from the second medium sensor 116 to the imaging start position. In other words, the predetermined distance is set so that imaging of the medium begins after the determination period begins and before it ends.

[0064] First, determination unit 152 starts timing a determination period (S201). The determination period is the period from when the medium reaches second medium sensor 116 until the medium is transported a predetermined distance. In this case, determination unit 152 starts counting the control pulses supplied to motor 131 that drives first to fifth transport rollers 117a-e. The determination period may be the period from when the medium reaches second medium sensor 116 until a predetermined time has elapsed. In this case, determination unit 152 starts measuring the elapsed time from the time when the medium reaches second medium sensor 116.

[0065] Next, the determination unit 152 determines whether or not the lifting of the medium has been detected by the lifting sensor 113 based on the lifting signal output by the lifting sensor 113 (S202). The determination unit 152 determines that the lifting of the medium has been detected when the intensity of the light detected by the light receiving element 113f, as indicated by the lifting signal, is equal to or greater than a threshold value.

[0066] If the lifting sensor 113 detects that the medium is lifting (S202-Yes), the determination unit 152 determines whether or not the passage sensor 111 has detected the passage of the medium based on the passing signal output by the passing sensor 111 (S203). The determination unit 152 determines that the passage sensor 111 has detected the passage of the medium when the moving speed of the medium indicated by the passing signal is equal to or greater than a threshold value.

[0067] When the passage sensor 111 detects that the medium is passing (S203-Yes), the determination unit 152 determines that the medium is a bound medium, and the control unit 151 temporarily halts the transport of the medium by stopping the motor 131 (S204). That is, when the lift sensor 113 detects that the medium is lifted during the determination period, and the passage sensor 111 detects that the medium is passing, the determination unit 152 determines that the medium is a bound medium. The control unit 151 may display a warning on the display device 106. Note that stopping the transport of the medium and displaying a warning are examples of executing abnormality control.

[0068] If the passing sensor 111 does not detect that the medium is passing (S203-No), the determination unit 152 determines that the medium is a small medium with a curled trailing end, and the control unit 151 controls the imaging device 119 to capture an image of the medium (S205). "Small" means that the width of the medium in the medium transport direction A2 is small, and a "curled trailing end medium" means that the upstream end is bent upward. In other words, the determination unit 152 determines that the medium is a small medium with a curled trailing end if the lift sensor 113 detects that the medium is lifting during the determination period, and the passing sensor 111 does not detect that the medium is passing.

[0069] When the determination unit 152 determines that the medium is a small medium with a curled trailing end, the control unit 151 waits until the medium reaches the imaging start position. The imaging start position is, for example, midway between the position of the second medium sensor 116 and the position of the imaging device 119. In this case, the control unit 151 determines that the medium has reached the imaging start position when the medium is transported by the distance between the second medium sensor 116 and the imaging start position after the medium is detected by the second medium sensor 116. When the medium reaches the imaging start position, the control unit 151 controls the imaging device 119 to capture images of the medium from the downstream side of the medium as the medium is transported, and acquires an input image. The control unit 151 transmits the acquired input image to the information processing device via the interface device 132. This ends the determination process. That is, when the medium is determined to be a small medium with a curled trailing end, the determination process ends with the medium continuing to be transported.

[0070] Note that, if imaging of the medium has started in S212 (described later) before it is determined in S205 that the medium is a small medium with a curled trailing end, the control unit 151 continues imaging of the medium to obtain an input image.

[0071] The principle of determining whether a medium is a bound medium or a small, trailing edge curl medium will be described below.

[0072] 9(A) is a schematic diagram of the binding medium when it reaches the position of the feed roller 114 and the separation roller 115, as viewed from the side, and FIG. 9(B) is a schematic diagram of the binding medium when it is viewed from the top. In the example shown in FIG. 9(A), the binding medium is a lower medium M1 and an upper medium M2 bound by the binding portion S. When the binding medium reaches the position of the feed roller 114 and the separation roller 115, the lower medium M1 is stopped by the rotation of the separation roller 115, and only the upper medium M2 tries to advance in the medium conveying direction A2 by the rotation of the feed roller 114. At this time, since the leading end of the upper medium M2 is fixed to the lower medium M1 by the binding portion S, a lift occurs between the region T of the upper medium M2 that contacts the feed roller 114 and the binding portion S.

[0073] 10A is a schematic diagram showing a side view of a normal medium (meaning a medium other than a bound medium and a medium with a curled trailing end) during the determination period. When a normal medium is being transported, the lifting sensor 113 does not detect lifting during the determination period, and the passage sensor 111 detects that the medium is passing.

[0074] 10B is a schematic diagram of the binding medium viewed from the side during the determination period. As described above, the binding medium floats up at the positions of the feed roller 114 and the separation roller 115. Therefore, when the binding medium is being transported, the float sensor 113 detects the float during the determination period, and at the point in time when the float is detected, the passage sensor 111 detects that the medium is passing.

[0075] 11A is a schematic diagram showing a side view of a small medium with a curled trailing end during the determination period. When a small medium is being transported, the trailing end of the medium finishes passing through the passage sensor 111 and the pick roller 112 during the determination period and reaches the position of the lift sensor 113. In addition, the trailing end of the curled medium rises after passing through the pick roller 112 and pushes up the lift sensor 113. Therefore, when a small medium with a curled trailing end is being transported, the lift sensor 113 detects the lift during the determination period, and at the point when the lift is detected, the passage sensor 111 does not detect that the medium is passing.

[0076] 11B is a schematic side view of a normal-sized medium with a curled trailing end during the determination period. When a normal-sized medium with a curled trailing end is being transported, the trailing end of the medium does not reach the position of the lift-up sensor 113 during the determination period, so the lift-up sensor 113 does not detect the lift-up.

[0077] That is, by setting the length of the determination period so that it ends before the trailing end of a normal-sized medium reaches the position of the floating sensor 113, it is possible to distinguish between a bound medium and a normal-sized medium with a trailing end curl based on the detection result of the floating sensor 113. However, it is not possible to distinguish between a bound medium and a small curled medium only based on the detection result of the floating sensor 113. By further using the detection result of the passing sensor 111, it is possible to distinguish between a bound medium and a small medium with a trailing end curl.

[0078] Returning to FIG. 8, after it is determined in S204 that the medium is a bound medium, the control unit 151 determines whether or not imaging of the medium has been started by the imaging device 119 (S206). Because the imaging start position is a position downstream of the second medium sensor 116, it is determined that imaging by the imaging device 119 has not been started immediately after the medium reaches the second medium sensor 116. However, as will be described later, the determination unit 152 continuously determines whether or not the medium is a bound medium from before imaging of the medium is started to after it has been started. Therefore, depending on the timing at which the medium floats up, it may be determined that imaging by the imaging device 119 has been started.

[0079] If imaging of the medium has started (S206-Yes), the control unit 151 displays on the display device 106 a screen instructing the user to remove the medium from inside the medium conveying device 100 (S207). This ends the determination process. In other words, if the medium is determined to be a bound medium and imaging of the medium has started, the determination imaging process ends with the medium conveyance stopped.

[0080] If imaging of the medium has not started (S206-No), the control unit 151 displays on the display device 106 a screen for accepting a selection by the user as to whether or not to continue transporting the medium (S208).

[0081] Next, the control unit 151 judges whether or not the user's operation on the operation device 105 is an instruction to continue transporting the medium (S209). If the operation is not an instruction to continue transporting the medium (S209-No), the control unit 151 displays a screen on the display device 106 instructing the user to remove the medium from inside the medium transport device 100 (S207). This ends the judgment process.

[0082] If the operation instructs to continue transporting the medium (S209-Yes), the control unit 151 drives the motor 131 to transport the medium (S210).

[0083] Following S210, or if no floating of the medium is detected in S202 (S202-No), the control unit 151 determines whether or not the medium has reached the imaging start position for the first time (S211). If imaging of the medium has not started and the medium has reached the imaging start position, the control unit 151 determines that the medium has reached the imaging start position for the first time. If imaging of the medium has already started or the medium has not reached the imaging start position (S211-No), the determination process proceeds to S202.

[0084] When the medium reaches the imaging start position for the first time (S211-Yes), the control unit 151 controls the imaging device 119 to start imaging the medium (S212). After that, the control unit 151 images the medium in sequence from the downstream side of the medium as the medium is transported.

[0085] Next, the determination unit 152 determines whether or not the determination period has ended (S213). For example, the determination unit 152 determines whether or not the determination period has ended based on the number of control pulses supplied to the motor 131 after the medium is detected by the second medium sensor 116.

[0086] If the determination period has not ended (S213-No), the determination process proceeds to S202. In this case, in the subsequent determination period, it is determined whether the floating of the medium and the passing of the medium have been detected in parallel with the imaging of the medium.

[0087] If the determination period has ended (S213-Yes), the determination unit 152 determines that the medium is not a small trailing end curl medium or a bound medium, and continues imaging the medium (S214). After completing imaging of the medium and acquiring an input image, the determination unit 152 transmits the acquired input image to the information processing device via the interface device 132. This ends the determination process.

[0088] As described above, the medium conveying device 100 determines that the medium is a bound medium when, during the determination period, the lifting of the medium is detected by the lift sensor 113 arranged downstream of the separation roller 115 and the passage of the medium is detected by the passage sensor 111 arranged upstream of the separation roller 115. This allows the medium conveying device 100 to distinguish between bound media and small media with a curled trailing end, enabling the medium conveying device 100 to more accurately detect media for which abnormality control should be performed.

[0089] Furthermore, if the image capturing of the medium has not started at the time when the medium is determined to be a bound medium, the medium conveying device 100 accepts the user's selection of whether or not to continue conveying the medium, and if the image capturing of the medium has started, the medium conveying device 100 stops conveying the medium. That is, by accepting the user's selection at the time when the medium is determined to be a bound medium, it is possible to save the user the trouble of re-mounting the medium on the mounting table 103 when a medium that is not a bound medium is erroneously determined to be a bound medium. However, if the image capturing of the medium has started at the time when the conveying is temporarily stopped, a normal input image will not be acquired, so the user must re-mount the medium on the mounting table 103 regardless of whether or not it is an erroneous determination. By having the above-mentioned configuration, the medium conveying device 100 saves the user the trouble of re-mounting the medium and the trouble of selecting whether or not to continue conveying the medium, thereby improving the convenience for the user.

[0090] In the above description, if the operation instructs the continuation of transport of the medium in S209 of the determination process, the determination process proceeds to S210, but the present invention is not limited to this example. For example, if the user's operation is an instruction to continue transporting the medium, the determination process may proceed to S205 or S214, and the medium may be imaged and the determination process may end. In other words, if the user's operation is an instruction to continue transporting the medium, the medium transport device 100 may not need to subsequently determine whether the medium is a bound medium.

[0091] For example, if the user's operation is an instruction to continue transporting the medium, the determination process may proceed to S205 or S214, and the medium may be imaged and the determination process may end. For example, if it is determined in S204 that the medium is a bound medium, the determination unit 152 may display a screen on the display device 106 that accepts the selection of whether or not to continue transporting the medium, regardless of whether or not imaging of the medium has started. This also saves the user the trouble of re-loading the medium, making it possible to improve convenience for the user.

[0092] In the above description, the passage sensor 111 is a slit type encoder or a magnetic encoder, but is not limited to such an example. For example, the passage sensor 111 may detect the passage of a medium based on an electromotive force generated by a driven roller that rotates in accordance with the movement of the medium along the transport direction A2. In this case, the passage sensor 111 has a driven roller and a conversion circuit that generates a voltage according to the rotation speed of the driven roller. The conversion circuit includes a motor that rotates in accordance with the rotation of the driven roller and its peripheral circuitry that generates a voltage according to the rotation speed, and outputs a signal having a different value according to the generated voltage as a passage signal. For example, the passage sensor 111 detects the passage of a medium when the voltage indicated by the passage signal is equal to or higher than a threshold value.

[0093] 12 is a diagram for explaining a conveying path inside a medium conveying device 200 according to another embodiment. Medium conveying device 200 differs from medium conveying device 100 in that it has a second housing 202, a passing sensor 211, and a floating sensor 213 instead of second housing 102, passing sensor 111, and floating sensor 113.

[0094] The second housing 202 has a second guide 202a disposed above the medium transport path. The second guide 202a is formed to be substantially parallel to the first guide 101a. In addition, a recess 202b recessed upward is formed in the second guide 202a between the separation roller 115 and the first transport roller 117a.

[0095] The passage sensor 211 is disposed upstream of the separation roller 115 and downstream of the pick roller 112, and detects the passage of a medium. The passage sensor 211 has a configuration similar to that of the passage sensor 111.

[0096] 13 is a schematic diagram for explaining the configuration of the floating sensor 213. The floating sensor 213 is disposed above the medium transport path and in a recess 202b formed between the separation roller 115 and the first transport roller 117a. The floating sensor 213 has an ultrasonic transmitter 213a and an ultrasonic receiver 213b.

[0097] The ultrasonic transmitter 213a is disposed on a side surface of the recess 202b and outputs ultrasonic waves along the medium transport direction A2. The ultrasonic receiver 213b is disposed opposite the ultrasonic transmitter 213a and receives the ultrasonic waves output by the ultrasonic transmitter 213a. The ultrasonic receiver 213b outputs a signal according to the intensity of the received ultrasonic waves as a lift-off signal.

[0098] When the medium is not lifted, the ultrasonic receiver 213b directly receives the ultrasonic waves output by the ultrasonic transmitter 213a. When the medium is lifted, the ultrasonic receiver 213b receives the ultrasonic waves output by the ultrasonic transmitter 213a and transmitted through the lifted medium. Since the ultrasonic waves are attenuated when passing through the medium, the lifting of the medium can be detected based on the intensity of the ultrasonic waves received by the ultrasonic receiver 213b.

[0099] Since the ultrasonic transmitter 213a and the ultrasonic receiver 213b do not come into contact with the floating medium, mechanical deterioration such as wear is unlikely to occur, and the number of maintenance steps and costs can be reduced. Therefore, by having the floating sensor 213, the medium conveying device 200 can improve maintainability.

[0100] Furthermore, by forming the recess 202b in the second guide 202a, the floating of the medium is not prevented by the second guide 202a. Therefore, the medium conveying device 200 can detect the floating of the medium with higher accuracy.

[0101] 14 is a diagram for explaining a conveying path inside a medium conveying device 300 according to another embodiment. The medium conveying device 300 differs from the medium conveying device 100 in that the medium conveying device 300 has a second housing 302, a passing sensor 311, and a floating sensor 313 instead of the second housing 102, the passing sensor 111, and the floating sensor 113.

[0102] The second housing 302 has a second guide 302a disposed above the medium transport path. The second guide 302a is formed to be substantially parallel to the first guide 101a. In addition, a recess 302b recessed upward is formed on the upstream side of the separation roller 115 of the second guide 302a.

[0103] The passage sensor 311 is disposed upstream of the separation roller 115 and downstream of the pick roller 112, so as to sandwich the recess 302b together with the separation roller 115, and detects the passage of a medium. The configuration of the passage sensor 311 is the same as the configuration of the passage sensor 111.

[0104] 15 is a schematic diagram for explaining the configuration of the floating sensor 313. The floating sensor 313 is disposed above the medium transport path, in a recess 302b formed between the passage sensor 311 and the separation roller 115. The floating sensor 313 has a light emitter 313a which is an LED, and a light receiver 313b which is a photodiode.

[0105] The light emitter 313a is disposed on the bottom surface of the recess 302b and emits light downward. The light receiver 313b is disposed on the bottom surface of the recess 302b and receives the light emitted from the light emitter 313a and reflected by the medium. The light receiver 313b outputs a signal indicating a different value according to the time from when the light emitter 313a emits light to when the light receiver 313b receives the light as a floating signal. For example, the floating sensor 313 detects the floating of the medium when the time from when the light emitter 313a emits light to when the light receiver 313b receives the light, as indicated by the floating signal, is equal to or less than a threshold value.

[0106] When the medium is lifted, the distance between the light emitter 313a and the light receiver 313b and the medium is shorter than when the medium is not lifted, and the time from when the light emitter 313a irradiates light to when the light receiver 313b receives the light is shorter. Therefore, it is possible to detect whether the medium is lifted based on the time from when the light emitter 313a irradiates light to when the light receiver 313b receives the light.

[0107] Since the light emitter 313a and the light receiver 313b do not come into contact with the floating medium, mechanical deterioration such as wear is unlikely to occur, and the number of maintenance steps and costs can be reduced. Therefore, by having the floating sensor 313, the medium conveying device 300 can improve maintainability.

[0108] Furthermore, the lift sensor 313 is disposed upstream of the separation roller 115. This allows the medium conveying device 300 to detect the lift of the medium early after the bound medium reaches the separation roller 115 and separation of the medium begins. Therefore, the medium conveying device 300 makes it possible to prevent as much as possible damage to the medium that occurs when attempting to separate the bound medium.

[0109] The various embodiments described above may be combined as appropriate for implementation. For example, the lift sensor 213 may be disposed in the recess 302b.

[0110] 16 is a diagram showing a schematic configuration of a processing circuit 450 in a medium conveying device according to another embodiment. The processing circuit 450 is used in place of the processing circuit 150 of the medium conveying device 100, and executes a medium reading process. The processing circuit 450 has a control circuit 451, a determination circuit 452, and the like. Each of these components may be formed of an independent integrated circuit, microprocessor, firmware, and the like.

[0111] The control circuit 451 is an example of a control unit, and has the same functions as the control unit 151. The control circuit 451 receives an operation signal from the operation device 105, a first medium signal from the first medium sensor 110, and a determination result in the determination process from the determination circuit 452, and controls the motor 131 based on the received signals and the determination result. The control circuit 451 also receives an input image from the imaging device 119, and transmits it to the information processing device via the interface device 132.

[0112] The determination circuit 452 is an example of a determination unit, and has the same function as the determination unit 152. The determination circuit 452 receives a passing signal, a floating detection signal, and a second medium signal from the passing sensor 111, the floating sensor 113, and the second medium sensor 116, respectively. The determination circuit 452 determines whether the medium is a binding medium or not based on each received signal, and outputs the determination result to the control circuit 451.

[0113] As described above, the medium conveying device is capable of appropriately detecting the binding medium even when the processing circuit 450 is used.

[0114] It should be understood by those skilled in the art that various changes, substitutions, and modifications can be made to the present invention without departing from the spirit and scope of the present invention. For example, the above-mentioned embodiments and modifications may be appropriately combined within the scope of the present invention. [Explanation of symbols]

[0115] 100 Media transport device 112 Pick roller 113 Floating sensor 114 Feeding roller 115 Separation roller 116 Second Media Sensor 151 Control section 152 Judgment section

Claims

1. A feed roller that feeds while separating a medium, A conveyance roller disposed downstream of the feed roller in the conveyance direction of the medium, A passage sensor disposed upstream of the feed roller in the conveyance direction and detecting that the medium is passing through, A lifting sensor that detects the lifting of the medium between the passage sensor and the conveyance roller, A determination unit that determines that the medium is a bound medium when the lifting of the medium is detected by the lifting sensor and the passage of the medium is detected by the passage sensor, A control unit that executes abnormal control when it is determined that the medium is the bound medium, A medium conveyance device, characterized by comprising the above.

2. When it is determined that the medium is the bound medium, the control unit accepts a selection by the user as to whether to continue the conveyance of the medium, The medium conveyance device according to Claim 1.

3. Further comprising an imaging unit disposed downstream of the conveyance roller in the conveyance direction and imaging the conveyed medium, When it is determined that the medium is the bound medium, if the imaging of the medium has not been started, the control unit accepts a selection by the user as to whether to continue the conveyance of the medium, and if the imaging of the medium has started, the control unit stops the conveyance of the medium, The medium conveyance device according to Claim 1.

4. The lifting sensor is disposed between the passage sensor and the conveyance roller, and has an arm that rises in response to the lifting of the medium and a detector that detects the rising of the arm, The medium conveyance device according to Claim 1.

5. The lifting sensor is disposed between the passage sensor and the conveyance roller and above the conveyance path of the medium, and has a light emitter that irradiates light downward and a light receiver that receives the light irradiated by the light emitter and reflected by the medium, The medium conveyance device according to Claim 1.

6. The lifting sensor is disposed between the passage sensor and the conveyance roller and above the conveyance path of the medium, and has an ultrasonic transmitter that outputs ultrasonic waves along the conveyance direction and an ultrasonic receiver that is disposed opposite to the ultrasonic transmitter and receives the ultrasonic waves output by the ultrasonic transmitter, The medium conveyance device according to Claim 1.

7. Further comprising a guide disposed above the conveyance path of the medium, In the guide, a recess that is recessed upward is formed between the feed roller and the conveyance roller. The medium conveyance device according to claim 1.

8. When the moving speed of the medium in the conveyance direction is equal to or higher than a threshold value, the passage sensor detects that the medium is passing through. The medium conveyance device according to claim 1.

9. The passage sensor includes a driven roller that rotates according to the movement of the medium in the conveyance direction, and a conversion circuit that generates a voltage corresponding to the rotation speed of the driven roller. The medium conveyance device according to claim 8.

10. The determination unit determines whether the medium is a small curled medium. When it is determined that the medium is the small curled medium, the control unit does not execute abnormal control. The medium conveyance device according to claim 1.

11. A feeding roller that feeds while separating the medium, a conveyance roller disposed downstream of the feeding roller in the conveyance direction of the medium, a passage sensor disposed upstream of the feeding roller in the conveyance direction and detecting that the medium is passing through, and a lifting sensor that detects the lifting of the medium between the passage sensor and the conveyance roller. A control method for a medium conveyance device, comprising: When the lifting of the medium is detected by the lifting sensor and it is detected by the passage sensor that the medium is passing through, it is determined that the medium is a bound medium. When it is determined that the medium is the bound medium, abnormal control is executed. A control method characterized by including this.

12. A feeding roller that feeds while separating the medium, a conveyance roller disposed downstream of the feeding roller in the conveyance direction of the medium, a passage sensor disposed upstream of the feeding roller in the conveyance direction and detecting that the medium is passing through, and a lifting sensor that detects the lifting of the medium between the passage sensor and the conveyance roller. A control program for a medium conveyance device, comprising: When the lifting of the medium is detected by the lifting sensor and it is detected by the passage sensor that the medium is passing through, it is determined that the medium is a bound medium. When it is determined that the medium is the bound medium, abnormal control is executed. A control program characterized by causing the medium conveyance device to execute this.

Images