JP6398716B2 - Transport device - Google Patents

Description

  The present invention relates to a transport device that transports a sheet-like medium.

  Patent Document 1 discloses an image recording apparatus that performs image recording by an inkjet method. This image recording apparatus forms an image while conveying a sheet fed from a sheet feeding cassette by a sheet feeding roller by a pair of conveying rollers disposed upstream of the recording head. The paper feed cassette is disposed below the recording head, and the transport path between the paper feed roller and the transport roller pair is formed in a U-shaped curved shape. Further, the paper feed roller is rotatably provided at the tip end side of the rotatable arm, and moves downward as the remaining amount of paper loaded in the paper feed cassette decreases.

JP 2010-234757 A

  In the image forming apparatus having the U-shaped curved conveyance path as described above, the amount of sheets stacked in the sheet feeding cassette is large. For this reason, the shorter the conveyance distance between the sheet feeding roller and the pair of conveyance rollers, The conveyance resistance caused by the contact between the sheet fed from the sheet cassette and the guide of the conveyance path is increased. In particular, strong paper such as glossy paper, if the amount of paper loaded in the paper cassette is excessive, a large transport resistance is applied to the paper before the leading edge reaches the pair of transport rollers, causing jams. May occur. It is difficult for the user to know how much paper can be jammed in the paper feed cassette, and the paper is overloaded and suffers from the disadvantage of jamming.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a transport device that can prevent an unexpected situation from occurring even when the amount of medium loaded on a stacking unit is excessive.

  The transport device according to the present invention is a stacking unit capable of stacking a plurality of sheet-shaped media in a stacked state, and for feeding the medium by rotating while abutting on the medium stacked on the stacking unit. As the remaining amount of the medium in the feeding roller and the stacking unit decreases, the contact position between the medium stacked on the stacking unit and the feeding roller is the surface of the medium stacked on the stacking unit. A support mechanism that supports the feeding roller so as to be movable in a direction having an orthogonal direction component perpendicular to the driving mechanism, a driving mechanism that includes the driving source and drives the feeding roller, and a medium fed by the feeding roller A pair of conveying rollers for conveying the sheet and a conveying resistance applied to the medium before the leading edge reaches the pair of conveying rollers, provided downstream of the feeding roller and upstream of the pair of conveying rollers. Of media in the department A transport path configured to increase as the loading amount increases; a storage unit that stores a loading limit amount smaller than a full loading amount to the loading unit with respect to the first type medium; and a control unit. . The control unit includes a loading amount information acquisition process for acquiring the loading amount information of the medium in the loading unit, a type information acquisition process for acquiring the type information of the medium loaded on the loading unit, and the loading unit. When the type of the loaded medium is the first type, a determination process for determining whether the acquired load amount is equal to or greater than the load limit amount, and the acquired load amount is equal to or greater than the load limit amount A notification information output operation for outputting notification information to the user regarding the loading amount on the loading unit, and a torque larger than the torque when the loading amount of the medium in the loading unit is less than the loading limit amount, It is possible to execute a first overload handling process that performs at least one of a torque switching operation for controlling the drive mechanism so that the feeding roller feeds the medium.

  In another aspect, the transport device according to the present invention can stack a plurality of sheet-shaped media in a stacked state, and rotate the media while rotating in contact with the media stacked on the stacking portion. As the remaining amount of media in the feeding roller for feeding and in the stacking unit decreases, the contact position between the media loaded on the stacking unit and the feeding roller is loaded on the stacking unit. A support mechanism that supports the feeding roller so as to be movable in a direction having an orthogonal component perpendicular to the surface of the medium, a driving mechanism that includes a driving source and drives the feeding roller, and the feeding roller. A pair of transport rollers for transporting the fed medium, a transport path having a U-shape provided between the feed roller and the pair of transport rollers, and a first type of medium to the stacking unit. Load limit less than full load A storage unit for 憶, and a control unit. The control unit includes a loading amount information acquisition process for acquiring the loading amount information of the medium in the loading unit, a type information acquisition process for acquiring the type information of the medium loaded on the loading unit, and the loading unit. When the type of the loaded medium is the first type, a determination process for determining whether the acquired load amount is equal to or greater than the load limit amount, and the acquired load amount is equal to or greater than the load limit amount A notification information output operation for outputting notification information to the user regarding the loading amount on the loading unit, and a torque larger than the torque when the loading amount of the medium in the loading unit is less than the loading limit amount, It is possible to execute a first overload handling process that performs at least one of a torque switching operation for controlling the drive mechanism so that the feeding roller feeds the medium.

  According to the transport apparatus of the present invention, depending on the type of the medium, if the amount of the medium stacked on the stacking unit is excessive, a large transport resistance is applied to the medium in the transport path, so that jamming is likely to occur. However, by outputting the notification information to the user, it is possible to prevent the user from being disadvantaged without knowing anything. Further, by causing the medium to be fed at a high torque, it is possible to suppress the occurrence of a jam.

1 is a schematic side view showing an internal structure of a multifunction machine including an image forming apparatus to which a conveying device according to a first embodiment of the present invention is applied. FIG. 2 is a block diagram schematically showing an electrical configuration of the multifunction machine shown in FIG. 1. It is an example of the table memorize | stored in the limitation amount memory | storage device shown in FIG. It is an example of the 1st alerting | reporting screen displayed on the touch panel shown in FIG. It is an example of the 2nd alerting | reporting screen displayed on the touch panel shown in FIG. 3 is a flowchart illustrating a procedure of paper feed processing when image recording processing is executed in the multifunction peripheral shown in FIG. 1. 7 is a flowchart showing a procedure of special paper feed processing shown in FIG. 6. It is a flowchart which shows the procedure of the special paper conveyance process performed with the conveying apparatus concerning 2nd Embodiment of this invention.

<First Embodiment>
Hereinafter, a preferred first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an example will be described in which the conveyance device of the present invention is applied to an image forming apparatus 10 mounted on a so-called multifunction machine having a print function, a scan function, and a copy function. FIG. 1 shows an internal configuration of an image forming apparatus 10 in the multifunction machine 1. In the following description, the vertical direction is defined on the basis of the state in which the multifunction device 1 is installed so as to be usable (state in FIG. 1), and the side on which the opening 13 of the housing 11 is provided is the front side (front side). And the left-right direction is defined when the multifunction device 1 is viewed from the front side (front).

  As shown in FIG. 1, the image forming apparatus 10 includes a recording unit 6, a transport device 7 including a first paper feed tray 91, a second paper feed tray 92, and a discharge tray 5, and a control unit 8. The recording unit 6, the transport device 7, and the control unit 8 are accommodated in the housing 11 of the multifunction machine 1. Operation buttons 3 and a touch panel 4 (see FIG. 2) are provided on the front surface of the housing 11. In the housing 11, the recording unit 6, the first paper feed tray 91, and the second paper feed tray 92 are arranged in this order from the top to the bottom. Although not shown in FIG. 1, a reading device 2 (see FIG. 2) of the multifunction machine 1 is disposed above the recording unit 6. The transport device 7 transports the paper 9 inside the image forming apparatus 10. In the following description, the direction in which the paper 9 is transported by the transport device 7 is referred to as “transport direction”. Further, the downstream end with respect to the conveyance direction of the sheet 9 is referred to as a “tip”.

  The recording unit 6 includes a carriage 61, a recording head 63, and a carriage driving mechanism 65 (see FIG. 2). The carriage 61 is supported by two guide rails 67a and 67b. The two guide rails 67a and 67b are spaced apart from each other in the front-rear direction, and each extend in the left-right direction. The carriage 61 is disposed so as to straddle the two guide rails 67a and 67b. The carriage drive mechanism 65 includes the drive motor 31 (see FIG. 2), and the carriage 61 is reciprocated in the left-right direction, which is the main scanning direction, along the two guide rails 67a and 67b under the control of the control unit 8. Let The recording head 63 is mounted on the carriage 61. The recording head 63 ejects ink supplied from an ink cartridge (not shown) from nozzles (not shown) provided on the lower nozzle surface 69.

  Each of the first paper feed tray 91 and the second paper feed tray 92 is capable of stacking and storing a plurality of sheets 9 in a stacked state. Both the first paper feed tray 91 and the second paper feed tray 92 can be inserted and removed in the front-rear direction from the opening 13 formed in the front surface of the housing 11. A discharge tray 5 is disposed above the front side of the first paper feed tray 91, and the discharge tray 5 moves together with the first paper feed tray 91.

  In the following description, when the first paper feed tray 91 and the second paper feed tray 92 are not distinguished, they are referred to as “paper feed tray 90”. Further, the first paper feed tray 91 and the second paper feed tray 92 have substantially the same configuration. Accordingly, the same components will be described with the same reference numerals.

  The sheet feeding tray 90 includes a base plate 94 having a horizontal surface, side walls 95 erected upward at both the left and right ends and the front end of the base plate 94, and an inclined plate extending obliquely rearward and upward from the rear end of the base plate 94. 96 to form a box. The upper surface of the base plate 94 is a loading surface 94a on which the sheets 9 are stacked. A restricting member 97 that defines the full amount of sheets 9 in the sheet feed tray 90 is disposed at a position facing the stacking surface 94a. The regulating member 97 is disposed at a position where the height of the lower surface from the loading surface 94a becomes H. Since the paper feed tray 90 is regulated by the lower surface of the regulating member 97, the paper 9 cannot be stacked beyond the stacking amount (stacking height from the stacking surface 94 a) H. That is, the full load amount of the paper feed tray 90 is H. For example, if the height H is 25 mm and the thickness of plain paper is 0.1 mm, the load becomes full when 250 sheets of plain paper are stacked.

  Remaining amount sensors 21 for detecting the stacking amount of sheets 9 stacked on the sheet feeding tray 90 (stacking height from the stacking surface 94a) are provided at positions facing the stacking surface 94a of each sheet feeding tray 90, respectively. ing. As the remaining amount sensor 21, for example, a light reflection type sensor having a light emitting element and a light receiving element as disclosed in Japanese Patent Laid-Open No. 6-336352 is adopted, and the remaining sheet sensor 21 is used for the stacked sheets 9. The distance to the paper 9 may be measured by irradiating light and the amount of reflected light, and the remaining amount of the paper 9 may be detected from the distance.

  Each paper feed tray 90 is provided with a type sensor 98 for detecting the type of paper 9 stacked on the stacking surface 94a. As the type sensor 98, for example, the resistance of the sheet 9 may be measured by passing a current through the sheet 9. That is, the resistance value of the stacked paper 9 is acquired, and the type of the paper 9 is detected based on the resistance value. The type sensor 98 measures the weight of the plurality of sheets 9 stacked on the stacking surface 94a. The type sensor 98 detects the weight of the sheet 9 detected by the type sensor 98 and the remaining amount sensor 21. The type of paper 9 may be detected from the amount of paper 9 loaded. The type sensor 98 can detect the type of the loaded paper 9 (for example, plain paper, envelope, glossy paper). As will be described later, in this embodiment, only the first paper feed tray 91 needs to detect the type of the paper 9 stacked on the stacking surface 94a. A sensor 98 may be provided.

  Further, the paper feed tray 90 is provided with an open / close sensor 99 for detecting the open / closed state of the paper feed tray 90. As the open / close sensor 99, for example, a transmission type sensor including a light emitting element and a light receiving element can be employed. In this case, when the paper feed tray 90 is mounted, the light beam emitted from the light emitting element is blocked by the paper feed tray 90, and the light receiving element is irradiated from the light emitting element by pulling the paper feed tray 90 from the housing 11. The open / close state of the paper feed tray 90 is detected based on whether or not the light receiving element has received the light.

  In addition to the two paper feed trays 90 and the discharge tray 5, the transport device 7 includes a first paper feed roller 50 a, a second paper feed roller 50 b, a transport roller pair 71, a discharge roller pair 73, a platen 75, and a guide member 16. , 17 are included. The first paper feed roller 50a is disposed above the first paper feed tray 91 and feeds the paper 9 in the first paper feed tray 91 rearward. The second paper feed roller 50b is disposed above the second paper feed tray 92 and feeds the paper 9 in the second paper feed tray 92 backward. In the following description, when the first paper feed roller 50a and the second paper feed roller 50b are not distinguished, they are referred to as “paper feed roller 50”.

  The mechanisms that respectively support the two paper feed rollers 50 have substantially the same configuration. Accordingly, the same components will be described with the same reference numerals. That is, the paper feed roller 50 is rotatably supported at one end of the arm 51. The other end of the arm 51 opposite to the one supporting the paper feed roller 50 is supported by a support shaft 52 that is fixed to the housing 11 and extends in the left-right direction. Can be swung in a plane perpendicular to. The arm 51 is biased by a torsion spring 55 in a direction in which the paper feed roller 50 presses the paper 9 loaded on the paper feed tray 90, and the paper feed roller 50 is urged by the paper 9 loaded on the paper feed tray 90. Of these, the uppermost sheet 9 is brought into contact.

  The first paper feed roller 50a is driven by a paper feed roller drive mechanism 56a having a paper feed motor 33a (see FIG. 2), and the second paper feed roller 50b is a paper feed roller drive mechanism 56b having a paper feed motor 33b (see FIG. 2). (See FIG. 2). The driving force of the sheet feeding motors 33a and 33b is transmitted to each sheet feeding roller 50 through a plurality of gears (not shown) of the sheet feeding roller driving mechanisms 56a and 56b, and each sheet feeding roller is switched by switching the gears. The torque for rotating 50 can be switched. The torque for rotating each paper feed roller 50 can also be switched by changing the rotational speed of the paper feed motors 33a and 33b. In the following description, when the first paper feed motor 33a and the second paper feed motor 33b are not distinguished, they are referred to as “paper feed motor 33”, and when the paper feed roller drive mechanisms 56a and 56b are not distinguished, “ This is referred to as a “feed roller driving mechanism 56”.

  Further, since both of the two paper feed rollers 50 press the paper 9 by the urging force of the torsion spring 55, the paper 9 and the paper feed roller are reduced as the remaining amount of the paper 9 in the paper feed tray 90 decreases. The contact position with 50 moves in a direction having an orthogonal component (downward component) orthogonal to the surface of the sheet 9 loaded on the sheet feeding tray 90.

  The conveyance roller pair 71 and the discharge roller pair 73 are arranged with the recording unit 6 sandwiched in the front-rear direction, the conveyance roller pair 71 is arranged behind the recording unit 6, and the discharge roller pair 73 is arranged ahead of the recording unit 6. Has been. The position of the conveyance roller pair 71 in the front-rear direction is in front of the rear ends of the first paper feed tray 91 and the second paper feed tray 92. The platen 75 is disposed below the recording unit 6 so as to face the nozzle surface 69 of the recording unit 6.

  The conveyance roller pair 71 includes a driving roller 71a that is rotated by a driving force from the conveyance motor 35 (see FIG. 2), and a driven roller 71b that rotates along with the rotation of the driving roller 71a. The discharge roller pair 73 includes a driving roller 73a that is rotated by being applied with a driving force from the conveyance motor 35, and a driven roller 73b that rotates along with the rotation of the driving roller 73a.

  The guide members 16 and 17 are disposed in the vicinity of the rear end portion of the housing 11. The guide members 16 and 17 are opposed to each other at a predetermined interval in the front-rear direction. As will be described in detail later, between the guide members 16 and 17 is a conveyance path for the sheet 9 fed from the first sheet feed tray 91 and the second sheet feed tray 92. The guide member 16 is a curved plate-like member and extends from the vicinity of the rear end portion of the first paper feed tray 91 to the vicinity of the conveyance roller pair 71. The guide member 17 is a plate-like member that extends upward from the vicinity of the rear end of the second paper feed tray 92 and has a curved upper end. The end of the guide member 17 opposite to the second paper feed tray 92 side is located in the vicinity of the conveyance roller pair 71.

  The sheet 9 fed backward from the first sheet feed tray 91 by the first sheet feed roller 50a is directed obliquely upward by the inclined plate 96 provided at the rear end portion of the first sheet feed tray 91, and the guide member 16, 17, and reaches a position sandwiched between the conveyance roller pair 71. That is, the conveyance path 51 (indicated by a two-dot chain line in FIG. 1) between the first paper feed roller 50a and the conveyance roller pair 71 is a substantially U-shape curved with the rear side as the curved outer side and the front side as the curved inner side. It has a shape.

  The sheet 9 fed rearward from the second sheet feed tray 92 by the second sheet feed roller 50b is directed obliquely upward by the inclined plate 96 provided at the rear end portion of the second sheet feed tray 92, and the guide member 16, 17, and reaches a position sandwiched between the conveyance roller pair 71. That is, the conveyance path 52 (indicated by a two-dot chain line in FIG. 1) between the second paper feed roller 50 b and the conveyance roller pair 71 has a substantially U-shape like the conveyance path 51.

  As described above, as the remaining amount of the paper 9 in the paper feed tray 90 decreases, the contact position between the paper 9 and the paper feed roller 50 moves in a direction having a downward component. That is, the transport distance between the paper feed roller 50 and the transport roller pair 71 in the vertical direction becomes longer as the remaining amount of the paper 9 decreases. Therefore, in the U-shaped transport paths 51 and 52 provided downstream of the paper feed roller 50 and upstream of the transport roller pair 71, the curvature of the sheet 9 before the leading edge reaches the transport roller pair 71 is The larger the remaining amount of paper 9 in the first paper feed tray 91 and the second paper feed tray 92, the larger the amount. The greater the curvature of the sheet 9, the greater the force of spreading outward due to the stiffness. Thus, the friction between the guide members 16 and 17 and the paper 9 increases as the curvature increases, that is, as the remaining amount of the paper 9 increases. Therefore, in the U-shaped transport paths 51 and 52, the transport resistance before the leading edge of the paper 9 reaches the transport roller pair 71 increases as the remaining amount of the paper 9 increases.

  The transport resistance before the leading edge of the sheet 9 reaches the pair of transport rollers 71 indicates whether the tray for feeding the sheet 9 is the first sheet feed tray 91 or the second sheet feed tray 92, It also depends on what type of paper 9 is used. That is, the first paper feed roller 50a is positioned above the second paper feed roller 50b, and the first paper feed roller 50a has a shorter distance in the vertical direction between the pair of transport rollers 71. Therefore, the curvature of the sheet 9 before the leading edge reaches the pair of transport rollers 71 is larger in the transport path 51 from the first paper feed tray 91 than in the transport path 52 from the second paper feed tray 92. . Accordingly, the transport resistance before the leading edge of the sheet 9 reaches the transport roller pair 71 is greater in the transport path 51 than in the transport path 52 regardless of the stacking amount of the first paper feed tray 91 and the second paper feed tray 92. Will be bigger. Further, the stronger the paper 9 is, the stronger the force of returning from the bent state to the original. Accordingly, the conveyance resistance before the leading edge of the sheet 9 reaches the conveyance roller pair 71 is larger as the sheet 9 is stronger.

  The paper 9 fed from the paper feed tray 90 and sandwiched between the transport roller pair 71 is transported forward by the transport roller pair 71. The paper 9 transported forward by the transport roller pair 71 is supported by the platen 75, and ink is ejected from nozzles (not shown) of the recording head 63 that moves in the main scanning direction to record an image. The recorded paper 9 is conveyed forward by the discharge roller pair 73 and discharged to the discharge tray 5.

  The control unit 8 controls the entire multifunction device 1 and is connected to the operation buttons 3 and the touch panel 4. The operation button 3 and the touch panel 4 output an output signal corresponding to the user operation to the control unit 8. Further, the touch panel 4 displays notification information to the user based on an output signal from the control unit 8. In addition, the multifunction device 1 is connected to the carriage driving mechanism 65, the recording head 63, the paper feed roller driving mechanism 56, the conveyance motor 35, the remaining amount sensor 21, the type sensor 98, and the open / close sensor 99 of the image forming apparatus 10. ing. In addition, although the apparatus concerning the reader 2 is connected to the control part 8, description is abbreviate | omitted here. Furthermore, the control unit 8 is connected to a PC 100 that is an external device.

  As shown in FIG. 2, the control unit 8 includes a CPU (Central Processing Unit) 81, a ROM (Read Only Memory) 82, a RAM (Random Access Memory) 83, a limit amount storage device 84a, a paper type storage device 84b, an ASIC ( Application Specific Integrated Circuit) 85 and the like, which cooperate to control operations of the carriage drive mechanism 65, the recording head 63, the paper feed roller drive mechanism 56, the transport motor 35, and the like.

  In FIG. 2, the CPU 81 and the ASIC 85 are illustrated one by one. However, the control unit 8 may include only one CPU 81 and the one CPU 81 may collectively perform necessary processing. However, a plurality of CPUs 81 may be included, and the plurality of CPUs 81 may share the necessary processing. Further, the control unit 8 may include only one ASIC 85, and this one ASIC 85 may collectively perform the necessary processing. Alternatively, the control unit 8 includes a plurality of ASICs 85, and the plurality of ASICs 85 may share the necessary processing. May be performed.

  The limit storage device 84a stores a stack limit for the first paper feed tray 91 when the stacked paper 9 is an envelope and glossy paper. As described above, the sheets 9 can be loaded on the first sheet feed tray 91 without being restricted by the restriction member 97 up to the full load amount H. However, in the transport path 51 from the first paper feed tray 91, the transport resistance before the leading edge of the paper 9 reaches the transport roller pair 71 increases as the remaining amount of the paper 9 increases. Further, the transport resistance before the leading edge of the paper 9 reaches the transport roller pair 71 increases as the stiffness of the paper 9 increases. Therefore, when the paper 9 is a special paper such as an envelope or glossy paper, which is stronger than the plain paper, if the paper 9 is stacked up to the full load amount H, there is a possibility that an excessive conveyance resistance acts and a jam occurs. is there. Accordingly, the limit amount storage device 84 a stores a stacking limit amount that is smaller than the full load amount H for the first paper feed tray 91. Since the second paper feed tray 92 is disposed below the first paper feed tray 91, the conveyance resistance for the paper 9 fed from the second paper feed tray 92 under the condition that the paper types are the same. Is smaller than the conveyance resistance for the sheet 9 fed from the first sheet feed tray 92, regardless of the number of sheets. That is, if the paper types are the same, the conveyance resistance for the paper 9 fed from the second paper feed tray 92 loaded up to the full load amount H is from the first paper feed tray 91 when the remaining amount is one. It becomes smaller than the conveyance resistance for the paper 9 to be fed. Therefore, in the present embodiment, it is not necessary to store the stacking limit amount for the envelope and glossy paper for the second paper feed tray 92. However, the stacking limit amount for the second paper feed tray 92 may be stored for a medium that is stronger than the envelope and glossy paper.

  In the present embodiment, the limit amount storage device 84a stores two stacking limit amounts, a first stacking limit amount and a second stacking limit amount, for each of envelopes and glossy paper. The amount less than the first stacking limit is a stacking amount range in which the occurrence of a jam due to the conveyance resistance can be substantially suppressed even if the torque for rotating the paper feed roller 50a is set to a normal magnitude. The range of the first stacking limit amount and less than the second stacking limit amount is a stacking amount that can substantially suppress the occurrence of a jam caused by the conveyance resistance by increasing the torque for rotating the paper feed roller 50a more than usual. It is a range. The range equal to or larger than the second load amount is a load amount range in which it is difficult to suppress the occurrence of jam due to the conveyance resistance even if the torque for rotating the paper feed roller 50a is controlled.

  Specifically, for example, a table as shown in FIG. 3 is stored in the limit amount storage device 84a. Since the conveyance resistance increases as the stiffness of the paper 9 increases, as shown in FIG. 3, the paper 9 to be fed is stronger than the envelope in both the first stacking limit amount and the second stacking limit amount. The limit for glossy paper is smaller than the limit for envelopes.

  Further, as shown in the table of FIG. 3, the limit amount storage device 84a stores a recommended number of stacked sheets when the stacked sheets 9 are envelopes and glossy sheets. The recommended number of stacked sheets is the maximum number of stacked sheets that is less than the first stacking limit, and is the number of stacked sheets in which jamming due to conveyance resistance hardly occurs.

  The control unit 8 controls the loading of the sheets 9 loaded on the sheet feeding tray 90 when the MFP 1 is turned on and when sheet feeding is performed on the sheet feeding tray 90 (when the sheet feeding tray 90 is pulled out). Based on a signal received from a type sensor 98 that detects physical characteristics such as resistance and weight, the type information of the paper 9 loaded on the paper feed tray 90 is acquired (type information acquisition processing), and the paper type storage device 84b.

  Further, when the tray for sending out the paper 9 when forming an image is the first paper feed tray 91, the control unit 8 stacks the paper that is stacked based on the type information stored in the paper type storage device 84b. It is determined whether 9 is a strong special paper (envelope or glossy paper in this embodiment). If the sheet 9 is a special sheet, the stacking amount information of the sheet 9 stacked on the first sheet feeding tray 91 is acquired based on the signal received from the remaining amount sensor 21 (loading amount information acquiring process). ). Furthermore, the first stacking limit amount and the second stacking limit amount that are stored in the limit amount storage device 84a and that correspond to the type of the sheets 9 stacked on the first sheet feeding tray 91 are obtained by the stacking amount information acquisition process. The acquired load amount is compared (judgment process).

  When the acquired load amount is not less than the first load limit amount and less than the second load limit amount, a first notification screen 86 as shown in FIG. 4 is displayed on the touch panel 4 (first overload handling process). The first notification screen 86 includes a warning message 86a indicating that the vehicle is overloaded. The first notification screen 86 includes a recommended stack number display 86b based on the recommended stack number corresponding to the type of the sheet 9 acquired from the table shown in FIG. Further, the first notification screen 86 includes a paper feed execution button 86c for instructing execution of paper feed and a cancel button 86d for canceling paper feed. When receiving a paper feed permission signal based on the user operating the paper feed execution button 86c from the touch panel 4, the control unit 8 controls the paper feed roller driving mechanism 56 that drives the paper feed roller 50a. Paper feeding is performed with a torque T2 larger than the torque T1 (when the loading amount of the sheets 9 is less than the first stacking limit amount) (second overload handling process).

  If the acquired load amount is greater than or equal to the second load limit amount, a second notification screen 87 as shown in FIG. 5 is displayed on the touch panel 4 (first overload handling process). Similar to the first notification screen 86, the second notification screen 87 includes a warning message 87a, a recommended stack number display 87b, and a cancel button 87d. However, the second notification screen 87 does not include the one corresponding to the paper feed execution button 86 c included in the first notification screen 86. That is, when the amount is equal to or greater than the second stacking limit amount, the sheet feeding cannot be executed.

  Next, an example of paper feed processing when image recording processing is executed in the multifunction device 1 will be described with reference to FIGS.

  As shown in FIG. 6, first, the presence / absence of a recording command from the user is determined (step S1). The recording command may be input from the operation button 3 or the touch panel 4 provided in the PC 100 or the multifunction device 1, or may be acquired from an external device through a communication network. The recording command includes the number of recordings and image data to be recorded. The recording command may include information on the type of paper 9 on which an image is recorded (whether it is plain paper or glossy paper).

  The process of step S1 is repeated until it is determined that there is a recording command. When it is determined that there is a recording command (S1: YES), it is determined which of the first paper feed tray 91 and the second paper feed tray 92 is to feed paper (S2). Specifically, when the information about the type of the sheet 9 on which the image is to be recorded is included in the recording command, the sheet 9 loaded in each sheet feed tray 90 stored in the sheet type storage device 84b is stored. Based on the type information, the tray 90 on which the types of paper 9 matching the information included in the recording command are stacked is determined as a tray to be fed. On the other hand, if the recording command does not include information on the type of paper 9 on which an image is to be recorded, one of the predetermined paper feed trays (the first paper feed tray 91 in the present embodiment) is used as a tray for feeding paper. decide. In the following description, it is assumed that the tray for feeding paper is determined as the first paper feed tray 91 in S2. Although illustration and description are omitted, if the second paper feed tray 92 is determined as the second paper feed tray 92 in S2, the process proceeds to S5 and proceeds.

  Subsequently, it is determined whether or not the paper 9 loaded on the first paper feed tray 91 determined as the tray to be fed in step S2 is a strong special paper, that is, an envelope or glossy paper. (S3). If it is determined that the paper is special paper (S3: YES), a special paper feed process described later is executed (S4). If it is not special paper, that is, it is plain paper (S3: NO), the paper feed roller drive mechanism 56 is controlled to drive the paper feed roller 50a, and paper is fed with torque T1 (S5). Finally, it is determined whether or not the number of recording sheets 9 included in the recording command has been fed (S6). If it is determined that the number of recording sheets has not been fed (S6: NO), the process returns to step S5 to repeat feeding with torque T1. On the other hand, if it is determined that the number of recorded sheets has been fed (S6: YES), the process is terminated.

  Here, the special paper feed process executed in step S4 described above will be described with reference to FIG.

  First, based on the signal received from the remaining amount sensor 21, the stack amount information of the sheets 9 stacked on the first sheet feed tray 91 is acquired (S11: stack amount information acquisition process). Then, the stacking amount according to the stacking information acquired in step S11 and the first stacking limit amount corresponding to the type of the sheets 9 stacked on the first sheet feed tray 91 stored in the limit amount storage device 84a are obtained. The comparison is made to determine whether or not the acquired load amount is equal to or greater than the first load limit amount (S12). If the load amount is not equal to or greater than the first load limit amount (S12: NO), the process proceeds to step S5 of the flow of FIG.

  On the other hand, if the acquired load amount is equal to or greater than the first load limit amount (S12: YES), the load amount related to the load information acquired in step S11 and the first paper feed stored in the limit amount storage device 84a. The second stacking limit amount corresponding to the type of paper 9 loaded on the tray 91 is compared, and it is determined whether or not the acquired stacking amount is less than the second stacking limit amount (S13). When the load amount is less than the second load limit amount (S13: YES), a first notification screen 86 as shown in FIG. 4 is displayed on the touch panel 4 (S14).

  Subsequently, it is determined whether or not the paper feed execution button 86c displayed on the first notification screen 86 has been operated (S15). If it is determined that the paper feed execution button 86c has been operated (S15: YES), the paper feed roller driving mechanism 56 is controlled to drive the paper feed roller 50a, and paper is fed with torque T2 (S16). The torque T2 is larger than the torque T1 in step S5 of the flow of FIG. Furthermore, the load amount information is acquired again based on the signal received from the remaining amount sensor 21 (S17), and it is determined again whether the load amount is equal to or greater than the first load limit amount (S18). If the load amount is not equal to or greater than the first load limit amount (S18: NO), the process proceeds to step S5 in the flow of FIG. 6, and the paper is fed with the torque T1. On the other hand, if the stacking amount is equal to or greater than the first stacking limit amount (S18: YES), the process returns to step S16 to feed paper with torque T2.

  If it is determined in step S15 that the paper feed execution button 86c has not been operated (S15: NO), it is determined whether or not the cancel button 86d displayed on the first notification screen 86 has been operated (step S15). S19). If it is determined that the cancel button 86d has been operated (S19: YES), the paper feed process is terminated. If it is determined that the cancel button 86d has not been operated (S19: NO), it is determined based on the output signal from the opening / closing sensor 99 whether or not the opening / closing operation of the first paper feed tray 91 has been performed ( S20). When it is determined that the opening / closing operation of the first paper feed tray 91 has been performed (S20: YES), the process returns to the above-described step S11 to acquire the stacking amount information of the paper 9 loaded on the first paper feed tray 91. To do. If it is determined that the first paper feed tray 91 has not been opened / closed (S20: NO), the process returns to step S15 to determine whether the paper feed execution button 86c has been operated.

  On the other hand, if it is not determined in step S13 that the acquired load amount is less than the second load limit amount (S13: NO), a second notification screen 87 as shown in FIG. (S21). Subsequently, it is determined whether or not the cancel button 87d displayed on the second notification screen 87 is operated (S22). If it is determined that the cancel button 87d has been operated (S22: YES), the paper feed process is terminated. If it is determined that the cancel button 87d has not been operated (S22: NO), it is determined based on the output signal from the opening / closing sensor 99 whether or not the opening / closing operation of the first paper feed tray 91 has been performed ( S23). If it is determined that the opening / closing operation of the first paper feed tray 91 has been performed (S23: YES), the process returns to the above-described step S11 to acquire the stacking amount information of the paper 9 loaded on the first paper feed tray 91. To do. If it is determined that the first paper feed tray 91 has not been opened or closed (S23: NO), the process returns to step S22 described above to determine whether or not the cancel button 87d has been operated.

As described above, in the transport device 7 according to the present embodiment, the paper 9 fed by the paper feed roller 50a downstream of the paper feed roller 50a that feeds the paper 9 stacked on the first paper feed tray 91. In the transport path 51 provided upstream of the transport roller pair 71 for transporting the paper 9, the leading end of the paper 9 reaches the transport roller pair 71 as the amount of the paper 9 stacked on the first paper feed tray 91 increases. The conveyance resistance applied to the sheet 9 is increased so far. In addition, the limit amount storage device 84 a stores a first stacking limit amount that is smaller than the full load amount of the first sheet feed tray 91 for special paper that is stronger than plain paper. Based on the signal from the type sensor 98, the control unit 8 acquires the type information of the sheets 9 stacked on the first paper feed tray 91. When the paper 9 loaded on the first paper feed tray 91 that feeds the paper 9 on which an image is to be recorded is a special paper, a special paper conveyance process is executed. In the special paper transport process, the stacking amount information of the sheets 9 stacked on the first paper feed tray 91 is acquired based on the signal from the remaining amount sensor 21, and the stacking amount related to the acquired stacking amount information is the limit amount. It is determined whether or not the load amount is greater than or equal to the first load limit amount stored in the storage device 84a. The first notification screen 86 or the second notification screen 87 including the notification information is displayed.
In the configuration of the present embodiment, depending on the type of the paper 9, if the amount of the paper 9 stacked on the first paper feed tray 91 is excessive, a large transport resistance is applied to the paper 9 in the transport paths 51 and 52. , Easy to jam. However, by outputting the notification information to the user, it is possible to prevent the user from being disadvantaged without knowing anything.

  Further, in the transport device 7 of the present embodiment, the curvature of the paper 9 before the leading edge reaches the transport roller pair 71 in the transport path 51 increases as the remaining amount of the paper 9 in the first paper feed tray 91 increases. Become. The limit storage device 84a stores a first stacking limit when the paper 8 is an envelope and a glossy paper that is stronger than the envelope, and the first stacking limit of the glossy paper is Less than the first stacking limit of envelopes. The control unit 8 executes special paper conveyance processing when the type of the paper 9 loaded on the first paper feed tray 91 is an envelope or glossy paper. In this configuration, the stronger the stiffness of the paper 9, the greater the transport resistance applied to the medium during paper feeding. Therefore, by reducing the first stacking limit for paper with stronger stiffness, it is possible to suppress the occurrence of jam due to a large transport resistance during paper feeding.

  In addition, in the transport device 7 of the present embodiment, after the first notification screen 86 is displayed on the touch panel 4, the paper feed roller driving mechanism 56 is controlled to drive the paper feed roller 50 a to feed paper. Therefore, the user can be notified that the amount of sheets 9 loaded on the first sheet feed tray 91 is excessive, and the sheets 9 can be fed.

  Further, in the transport device 7 of the present embodiment, the first notification screen 86 includes a paper feed execution button 86c, and the control unit 8 operates the paper feed execution button 86c by the user and feeds a paper feed permission signal from the touch panel 4. Is received, paper feeding is started. Therefore, paper can be prevented from being fed against the user's will.

  Further, in the transport device 7 of the present embodiment, when feeding paper after displaying the first notification screen 86 on the touch panel 4, the stacking amount of the sheets 9 in the first sheet feeding tray 91 is less than the first stacking limit amount. The paper feed roller drive mechanism 56 is controlled so that the paper feed roller 50a feeds the paper 9 with a torque T2 larger than the torque T1 at that time. Accordingly, it is possible to suppress the occurrence of a jam in the paper feeding after the first notification screen 86 is displayed.

  Further, in the transport device 7 of the present embodiment, in addition to the first stacking limit amount, a second stacking limit amount larger than the first stacking limit amount is stored in the limit amount storage unit 84a. When the acquired stacking amount is equal to or greater than the first stacking limit amount and less than the second stacking limit amount, the control unit 8 displays the first notification screen 86 on the touch panel 4 and then feeds with the torque T2 to load the stacking amount. Is equal to or greater than the second stacking limit amount, the second notification screen 87 is displayed on the touch panel 4 and paper feeding is not performed. Even if the amount of paper 9 loaded on the first paper feed tray 91 is overloaded, which is greater than or equal to the first stacking limit amount, if the degree is light, even if the paper 9 is fed, The probability of occurrence is low. Therefore, in the above-described configuration, both the notification to the user and the sheet 9 are fed when the degree of overloading is light, and the sheet 9 is fed only as a notification to the user in the severe case. By not performing it, it is possible to take an appropriate response according to the degree of overloading.

  In addition, the transport device 7 according to the present embodiment includes a type sensor 98 that detects physical characteristics such as resistance and weight of the sheets 9 stacked on the first sheet feed tray 91. Based on the signal received from the type sensor 98, the control unit 8 acquires the type information of the sheets 9 stacked on the first paper feed tray 91. Therefore, the type of the sheet 9 can be acquired with certainty.

  Further, in the transport device 7 of the present embodiment, the first notification screen 86 and the second notification screen 87 include recommended stack number displays 86b and 87b for notifying the maximum stack number that is less than the first stack limit. Therefore, the user can know information related to the stacking limit amount, and can take appropriate measures such as reducing the number of sheets 9 stacked on the first sheet feeding tray 91.

  In addition, in the transport device 7 of this embodiment, the transport paths 51 and 52 are transported to the paper 9 until the leading edge reaches the transport roller pair 71 as the amount of the paper 9 loaded on the paper feed tray 90 increases. It has a U shape that increases resistance. Therefore, since the U-shaped transport paths 51 and 52 are employed, the apparatus can be reduced in size.

  In the transport device 7 of the present embodiment, the paper feed roller 50 is rotatably supported by an arm 51 that can swing around a support shaft 52. Therefore, the support mechanism for the paper feed roller 50 can be simplified.

Second Embodiment
Next, a second embodiment of the present invention will be described. This embodiment is different from the first embodiment only in the content of the special paper feed process. Therefore, the special paper carrying process of the present embodiment will be described with reference to FIG.

  First, S21 to S23 are the same as S11 to S13 of the special paper conveyance process in the first embodiment, and thus the description thereof is omitted here. If it is determined in step S23 that the acquired stacking amount is less than the second stacking limit amount (S23: YES), the sheet feeding roller driving mechanism 56 is controlled to drive the sheet feeding roller 50a, and the loading amount is the first. Paper feeding is performed with a torque T2 that is larger than the torque T1 when the amount is less than one stacking limit (S24: torque switching operation). Thereafter, the process returns to step S21, and the stacking amount information of the sheets 9 stacked on the first sheet feeding tray 91 is acquired again.

  On the other hand, if it is not determined in step S23 that the acquired stacking amount is less than the second stacking limit amount (S23: NO), the sheet feeding roller driving mechanism 56 is controlled to drive the sheet feeding roller 50a, Paper feeding is performed with a torque T3 larger than the torque T2 when the load amount is equal to or greater than the first load limit amount and less than the second load limit amount (S25: torque switching operation). Thereafter, the process returns to step S21, and the stacking amount information of the sheets 9 stacked on the first sheet feeding tray 91 is acquired again.

  In the present embodiment, as in the first embodiment, the larger the stack amount of the sheets 9 stacked on the first sheet feed tray 91, the greater the transport resistance applied to the sheets 9 when the sheets 9 are fed. . Therefore, as described above, when the load amount of the sheets 9 loaded on the first sheet feed tray 91 is in an overload state that is equal to or more than the first load limit amount, and the degree is severe, the degree is mild By feeding the paper 9 with a torque larger than that of the jam, the occurrence of jam can be surely suppressed.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made as long as they are described in the claims. Is.

  In the above-described embodiment, a case where the first overload handling process for displaying the first notification screen 86 or the second notification screen 87 on the touch panel 4 when the acquired load amount is equal to or greater than the first load limit amount will be described. However, it is not limited to this. That is, for example, in the first overload handling process, the notification screen may not be displayed on the touch panel 4, and the sheet may be fed with a torque T2 that is larger than the torque T1 when the load is less than the first load limit. . In this case, by causing the paper 9 to be fed with a high torque, the occurrence of jam can be suppressed. Further, in the first overload handling process, a notification screen including notification information to the user regarding the load amount on the first paper feed tray 91 is displayed on the touch panel 4, and the load amount is less than the first load limit amount. Paper may be fed with a torque T2 larger than the torque T1 at that time. In this case, the timing for displaying the notification screen may be before, after, or simultaneously with the start of paper feeding.

    In the above-described embodiment, when the amount is equal to or larger than the first stacking limit amount and the first stacking limit amount is less than the second stacking limit amount, the first notification screen 86 is displayed and the operation of the paper feed execution button 86c is performed. Execution of paper feed and cancellation of paper feed by the operation of the cancel button 86d can be selected, and if it is equal to or greater than the second stacking limit amount, the second notification screen 87 is displayed and the paper feed by the operation of the cancel button 87d is displayed. Although only the cancellation can be selected, the present invention is not limited to this. When the amount exceeds the first stacking limit amount, the second notification screen 87 is displayed and only the cancellation of the paper feed by the operation of the cancel button 87d is displayed. May be selectable. Accordingly, it is possible to reliably suppress the occurrence of a jam without switching the driving torque of the paper feed roller.

  Further, in the above-described embodiment, the transport paths 51 and 52 for feeding the paper 9 from the paper feed tray 90 have a U-shape in which the exit side is positioned above the entrance side. In 51 and 52, the case where the curvature of the sheet 9 before the leading edge reaches the conveyance roller pair 71 increases as the remaining amount of the sheet 9 in the sheet feeding tray 90 increases, but the present invention is not limited to this. That is, in the transport paths 51 and 52, the transport resistance applied to the paper 9 before the leading edge of the paper 9 reaches the transport roller pair 71 needs to be larger as the remaining amount of the paper 9 is larger. The curvature of the sheet 9 before reaching the position may not change according to the remaining amount of the sheet 9 or may not have a U shape. For example, even if the transport path is substantially straight, the transport resistance may increase as the remaining amount of the paper 9 increases.

  In the above-described embodiment, the limit storage device 84a has the first stacking limit amount and the second stacking limit amount for one first sheet feeding tray 91 when the paper 8 is an envelope and glossy paper. Although the case where it memorize | stores was demonstrated, it is not limited to this. That is, the limit amount storage device 84a may store the stack limit amounts for two or more stacking units such as a paper feed tray. In this case, if the paper types are the same, it is necessary that there is an overlap in the range of conveyance resistance before the leading edge of the sheet 9 reaches the conveyance roller pair 71 for two or more stacking units. Further, if the stiffness (type) of the sheets stacked by the stacking unit is different, such overlapping of the resistance ranges is not necessarily required.

  Further, in the above-described embodiment, after performing the first overload handling process for displaying the first notification screen 86 on the touch panel 4, the user operates the paper feed execution button 86 c included in the first notification screen 86 and touches the touch panel. The case where the second overload handling process for feeding with a torque T2 larger than the torque T1 when the load amount is less than the first load limit amount when the paper feed permission signal is received from 4 has been described. It is not limited to. That is, for example, the execution of the second overload handling process may be automatically executed after the first overload handling process without being conditional on reception of the paper feed permission signal. Furthermore, in the second overload handling process, paper may be fed with the same torque as the torque T1 when the load is less than the first load limit.

  In addition, in the above-described embodiment, the type sensor 98 that detects physical characteristics such as resistance and weight of the sheets 9 stacked on the first paper feed tray 91 is provided. Although the case where the type information of the sheets 9 loaded on the first paper feed tray 91 is acquired based on the received signal has been described, the present invention is not limited to this. That is, if the user is configured to be able to input the type of paper 9 on which an image is to be recorded (for example, plain paper, envelope, glossy paper) by using the operation button 3 or the touch panel 4. The control unit 8 may acquire the type information of the sheets 9 stacked on the first sheet feed tray 91 based on the signal received from the operation button 3 or the touch panel 4. In this case, a mechanism for detecting the type of the paper 9 is not required, and the type of the paper 9 can be easily acquired.

  Furthermore, in the above-described embodiment, a case has been described in which the first notification screen 86 and the second notification screen 87 include recommended stack number displays 86b and 87b that notify the maximum stack number that is less than the first stacking limit amount. The first notification screen 86 and the second notification screen 87 do not have to include the recommended stack number display 86b, 87b.

  Furthermore, in the above-described embodiment, the case where the paper feed roller 50 is rotatably supported by the arm 51 that can swing around the support shaft 52 has been described, but the present invention is not limited to this. That is, for example, the paper feed roller 50 may be supported by a support member that is movable in the vertical direction.

8 Control part 35 Conveyance motor (drive source)
50 Paper feed roller (feed roller)
51, 52 Transport path 51 Arm (support mechanism)
56 Feeding roller driving mechanism 71 Conveying roller pair 84a Limit amount storage device (storage unit)
90 Paper tray (stacking section)
98 Type sensor (detection unit)

Claims (15)

A stacking unit capable of stacking a plurality of sheet-like media in a stacked state; and
A feeding roller for feeding the medium by rotating while abutting on the medium stacked on the stacking unit;
As the remaining amount of the medium in the stacking unit decreases, the contact position between the medium stacked on the stacking unit and the feeding roller is orthogonal to the surface of the medium stacked on the stacking unit. A support mechanism for supporting the feeding roller movably in a direction having a component;
A driving mechanism including a driving source and driving the feeding roller;
A pair of conveying rollers for conveying the medium fed by the feeding roller;
The transport resistance that is provided downstream of the feed roller and upstream of the transport roller pair and applied to the medium until the tip reaches the transport roller pair is large in the stacking amount of the medium in the stacking unit. A transport path configured to be as large as possible,
With respect to the first type medium, a storage unit that stores a load limit amount that is less than the full load amount to the stack unit;
And a control unit,
The controller is
Load amount information acquisition processing for acquiring the load amount information of the medium in the load unit;
A type information acquisition process for acquiring type information of a medium loaded on the stacking unit;
A determination process for determining whether or not the acquired load amount is equal to or greater than the load limit amount when the type of the medium loaded on the load unit is the first type;
A notification information output operation for outputting notification information to a user regarding the loading amount on the loading unit when the acquired loading amount is equal to or greater than the loading limitation amount, and the loading amount of the medium in the loading unit is the loading limitation And a first overload handling process that performs at least one of a torque switching operation for controlling the drive mechanism so that the feeding roller feeds the medium with a torque larger than the torque when the amount is less than the amount. There is a conveying device.   2. The transport device according to claim 1, wherein the curvature of the medium before the leading edge reaches the pair of transport rollers increases as the amount of the medium loaded in the stacking unit increases in the transport path. The storage unit stores the stacking limit amount with respect to the first type medium, and the stacking limit amount with respect to the first type medium with respect to a second type medium that is stronger than the first type medium. Smaller than the loading limit,
In the determination process, when the type of the medium loaded on the stacking unit is the first type or the second type, the control unit determines that the acquired stacking amount is greater than or equal to the stacking limit amount corresponding to each type. It is judged whether it exists or not, The conveying apparatus of Claim 2 characterized by the above-mentioned. The controller is
4. The determination process and the first overload handling process are not executed when the acquired medium type is a third type that is weaker than the first type medium. The transfer apparatus according to any one of the above.   The controller further performs a second overload handling process for controlling the drive mechanism so that the feeding roller feeds the medium after performing the notification information output operation in the first overload handling process. The conveyance device according to claim 1, wherein the conveyance device is possible.   The said control part performs a said 2nd overload corresponding | compatible process on the condition that a feeding permission signal is received, The conveying apparatus of Claim 5 characterized by the above-mentioned.   In the second overload handling process, the control unit drives the driving roller so that the feeding roller feeds the medium with a larger torque than when the medium loading amount in the loading unit is less than the stacking limit amount. The conveyance device according to claim 5 or 6, wherein the mechanism is controlled. The storage unit stores a first stacking limit amount and a second stacking limit amount larger than the first stacking limit amount as the stacking limit amount for the first type medium,
The controller is
In the determination process, when the type of the medium loaded on the loading unit is the first type, the acquired loading amount is compared with the first loading limit amount and the second loading limit amount, respectively.
If the acquired load amount is not less than the first load limit amount and less than the second load limit amount, the notification information output operation is performed in the first overload handling process, and then the second overload handling process is performed. Run
When the acquired load amount is equal to or greater than the second load limit amount, the notification information output operation is performed in the first overload handling process, and the second overload handling process is not executed. The conveyance apparatus of any one of Claims 5-7 to do. The storage unit stores a first stacking limit amount and a second stacking limit amount larger than the first stacking limit amount as the stacking limit amount for the first type medium,
The controller is
In the determination process, when the type of the medium loaded on the loading unit is the first type, the acquired loading amount is compared with the first loading limit amount and the second loading limit amount, respectively.
When the acquired stacking amount is equal to or more than the first stacking limit amount and less than the second stacking limit amount, the medium stacking amount in the stacking unit is less than the first stacking limit amount in the first overload handling process. Performing the torque switching operation for controlling the drive mechanism so that the feeding roller feeds the medium with a first torque larger than the torque at the time of
When the acquired stacking amount is equal to or larger than the second stacking limit amount, the feeding roller feeds the medium with a second torque larger than the first torque in the first overload handling process. The conveying device according to claim 5, wherein the torque switching operation for controlling the driving mechanism is performed. It further includes an operation unit that outputs a signal corresponding to a user operation,
The said control part acquires the classification information of the medium loaded on the said stacking part based on the signal received from the said operation part in the said classification information acquisition process. The transport apparatus according to item 1. A detection unit for detecting physical characteristics of the medium loaded on the loading unit;
The said control part acquires the classification information of the medium loaded in the said stacking part based on the signal received from the said detection part in the said classification information acquisition process. The transport apparatus according to item 1.   The said control part outputs the information containing the information regarding the said load limiting amount, when performing the said alerting | reporting information output operation | movement in a said 1st overload corresponding | compatible process. The transfer device according to item.   The transport path has a U-shape in which the transport resistance applied to the medium increases until the leading edge reaches the transport roller pair as the amount of the medium loaded in the stacking unit increases. The conveyance apparatus of any one of Claims 1-12.   The said support mechanism is an arm which can be rock | fluctuated centering | focusing on a fulcrum, Comprising: The arm which supports the said feed roller so that rotation is possible is included, The one of Claims 1-13 characterized by the above-mentioned. Conveying device. A stacking unit capable of stacking a plurality of sheet-like media in a stacked state; and
A feeding roller for feeding the medium by rotating while abutting on the medium stacked on the stacking unit;
As the remaining amount of the medium in the stacking unit decreases, the contact position between the medium stacked on the stacking unit and the feeding roller is orthogonal to the surface of the medium stacked on the stacking unit. A support mechanism for supporting the feeding roller movably in a direction having a component;
A driving mechanism including a driving source and driving the feeding roller;
A pair of conveying rollers for conveying the medium fed by the feeding roller;
A conveying path having a U-shape provided between the feeding roller and the conveying roller pair;
With respect to the first type medium, a storage unit that stores a load limit amount that is less than the full load amount to the stack unit;
And a control unit,
The controller is
Load amount information acquisition processing for acquiring the load amount information of the medium in the load unit;
A type information acquisition process for acquiring type information of a medium loaded on the stacking unit;
A determination process for determining whether or not the acquired load amount is equal to or greater than the load limit amount when the type of the medium loaded on the load unit is the first type;
A notification information output operation for outputting notification information to a user regarding the loading amount on the loading unit when the acquired loading amount is equal to or greater than the loading limitation amount, and the loading amount of the medium in the loading unit is the loading limitation And a first overload handling process that performs at least one of a torque switching operation for controlling the drive mechanism so that the feeding roller feeds the medium with a torque larger than the torque when the amount is less than the amount. There is a conveying device.

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