WO2022264278A1 - 媒体搬送装置 - Google Patents

媒体搬送装置 Download PDF

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Publication number
WO2022264278A1
WO2022264278A1 PCT/JP2021/022726 JP2021022726W WO2022264278A1 WO 2022264278 A1 WO2022264278 A1 WO 2022264278A1 JP 2021022726 W JP2021022726 W JP 2021022726W WO 2022264278 A1 WO2022264278 A1 WO 2022264278A1
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WO
WIPO (PCT)
Prior art keywords
medium
roller
feeding
protrusion
feeding roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/022726
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
喜一郎 下坂
修一 森川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PFU Ltd
Original Assignee
PFU Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PFU Ltd filed Critical PFU Ltd
Priority to JP2023528816A priority Critical patent/JP7506262B2/ja
Priority to PCT/JP2021/022726 priority patent/WO2022264278A1/ja
Priority to US18/568,746 priority patent/US12415692B2/en
Publication of WO2022264278A1 publication Critical patent/WO2022264278A1/ja
Anticipated expiration legal-status Critical
Priority to JP2024096177A priority patent/JP2024107420A/ja
Priority to US19/310,640 priority patent/US20250388419A1/en
Priority to JP2025169427A priority patent/JP2025182090A/ja
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0638—Construction of the rollers or like rotary separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/66—Article guides or smoothers, e.g. movable in operation
    • B65H3/68—Article guides or smoothers, e.g. movable in operation immovable in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/063—Rollers or like rotary separators separating from the bottom of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/523—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned over articles separated from the bottom of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • B65H3/5276—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned over articles separated from the bottom of the pile
    • B65H3/5284—Retainers of the roller type, e.g. rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/54—Pressing or holding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51214—Bending, buckling, curling, bringing a curvature parallel to direction of displacement of handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5122—Corrugating; Stiffening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
    • B65H2404/13161—Regularly spaced grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
    • B65H2404/13163—Details of longitudinal profile shape stepped or grooved in longitudinal direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/39—Scanning

Definitions

  • the present disclosure relates to a medium transport device, and more particularly to a medium transport device having a feed roller and a separation roller, a control method, and a control program.
  • media transport devices such as scanners that transport and image multiple media while separating them are used not only for general PPC (Plain Paper Copier) paper, but also for various types of paper such as thin paper, envelopes, and bound copy paper.
  • media is required to be conveyed.
  • Thin paper is highly likely to have wrinkles, tears, etc., and is weak in stiffness. Therefore, when thin paper is transported as a medium, buckling of the medium may occur, resulting in a jam of the medium. expensive.
  • a force to separate the sheets is applied to the medium, which may cause a jam of the medium.
  • a medium transport device has, as feeding modes, a separation mode in which media are fed while being separated, and a non-separation mode in which media are fed without being separated.
  • feeding modes a separation mode in which media are fed while being separated
  • non-separation mode a non-separation mode in which media are fed without being separated.
  • a paper feeding device having a paper feeding means for separating and feeding paper in a convex curled state one by one is disclosed (see Patent Document 1).
  • This paper feeder includes a turn guide that reverses the direction of the convex shape of the paper that is separated and fed, and a turn guide that is provided between the turn guide and the paper feeding means to reverse the direction of the convex shape of the paper that is reversed from the convex shape. and a guide member that guides while correcting to the curled state of the direction.
  • a paper feeding and conveying device having a paper feeding means, a pair of conveying rollers for conveying the paper fed from the paper feeding means, and a lower paper feed guide disposed between the paper feeding means and the pair of conveying rollers.
  • the lower paper feed guide has a portion where the paper guide surfaces on both end sides are higher than the central guide surface.
  • the purpose of the media transport device is to enable the appropriate feeding of multiple types of media.
  • a medium transporting device includes a guide member that has an opening or a notch and forms a medium transport surface; a roller, a separation roller arranged to face the feeding roller, and protrusions arranged on the left and right sides of the separation roller with respect to the medium conveyance direction, and the guide member is arranged with respect to the medium conveyance direction.
  • recesses located on the left and right sides of the feed roller, and the protrusions are arranged at positions facing the openings or cutouts or the recesses so that the medium is conveyed between the protrusions and the recesses.
  • the tip of the protrusion is located closer to the feed roller than the nip portion between the feed roller and the separation roller.
  • the medium transport device can appropriately feed multiple types of media.
  • FIG. 1 is a perspective view showing a medium conveying device 100 according to an embodiment
  • FIG. 4 is a diagram for explaining a transport path inside the medium transport device 100
  • FIG. 4 is a schematic diagram for explaining a feeding mechanism 120
  • FIG. 4 is a schematic diagram of the feeding mechanism 120 as viewed from above
  • FIG. 4 is a schematic diagram of the feeding mechanism 120 viewed from the downstream side
  • FIG. 7 is a graph showing the relationship between the length in the width direction A8 and the buckling load for each medium.
  • 5 is a cross-sectional view taken along the line A-A' in FIG. 4
  • FIG. 4 is a schematic diagram showing how a medium M1 is fed by a feeding mechanism 120
  • FIG. 3 is a perspective view of the feed arm 122 and the like as seen from the upstream side; 5 is a cross-sectional view taken along the line B-B' of FIG. 4; FIG. 4 is a perspective view of the feeding arm 122 as seen from the upstream side; FIG. FIG. 4 is a schematic diagram for explaining a set guide 124 and the like; FIG. 4 is a schematic diagram for explaining a set guide 124 and the like; FIG. 4 is a schematic diagram for explaining a set guide 124 and the like; 1 is a block diagram showing a schematic configuration of a medium conveying device 100; FIG. 2 is a diagram showing a schematic configuration of a storage device 140 and a processing circuit 150; FIG.
  • FIG. 7 is a flow chart showing an example of the operation of medium reading processing
  • FIG. 11 is a schematic diagram for explaining another protrusion 222a
  • (a) and (b) are schematic diagrams for explaining still another protrusion 322a.
  • (a) and (b) are schematic diagrams for explaining another guide member 421.
  • FIG. (a) is a schematic diagram for explaining another feeding arm 522
  • (b) is a schematic diagram for explaining still another feeding arm 622 .
  • 7 is a schematic diagram for explaining still another guide member 721.
  • FIG. 8 is a schematic diagram for explaining still another guide member 821.
  • FIG. 9 is a schematic diagram for explaining still another guide member 921.
  • FIG. 3 is a diagram showing a schematic configuration of another processing circuit 250;
  • FIG. 3 is a diagram showing a schematic configuration of another processing circuit 250;
  • FIG. 1 is a perspective view showing a medium conveying device 100 configured as an image scanner.
  • the medium conveying device 100 conveys a medium, which is an original, and captures an image.
  • the medium may be paper, thin paper, cardboard, card, copy paper, envelope, or the like.
  • Copy paper is a medium in which a plurality of sheets of thin paper are bound, such as carbonless paper.
  • the media transport device 100 may be a facsimile machine, a copier, a multifunction peripheral (MFP), or the like.
  • MFP multifunction peripheral
  • the medium to be conveyed may be an object to be printed instead of a document, and the medium conveying device 100 may be a printer or the like.
  • the medium transport device 100 includes a lower housing 101, an upper housing 102, a mounting table 103, a discharge table 104, an operation device 105, a display device 106, and the like.
  • the upper housing 102 is arranged to cover the upper surface of the medium transporting device 100, and is engaged with the lower housing 101 by a hinge so that it can be opened and closed when the medium is clogged, when cleaning the inside of the medium transporting device 100, or the like.
  • the mounting table 103 engages with the lower housing 101 and mounts a medium to be fed and transported.
  • the ejection table 104 engages with the upper housing 102 and places the ejected medium. Note that the discharge table 104 may be engaged with the lower housing 101 .
  • the operation device 105 has an input device such as a button and an interface circuit that acquires signals from the input device, receives an input operation by the user, and outputs an operation signal according to the user's input operation.
  • the display device 106 has a display including liquid crystal, organic EL (Electro-Luminescence), etc. and an interface circuit for outputting image data to the display, and displays the image data on the display.
  • FIG. 2 is a diagram for explaining the transport path inside the medium transport device 100.
  • FIG. 2 is a diagram for explaining the transport path inside the medium transport device 100.
  • the transport path inside the medium transport device 100 includes a medium sensor 111, a feed roller 112, a separation roller 113, a first transport roller 114, a second transport roller 115, an imaging device 116, a first discharge roller 117, and a second discharge roller 118. etc.
  • each of the feed roller 112, the separation roller 113, the first conveying roller 114, the second conveying roller 115, the first discharge roller 117 and/or the second discharge roller 118 is not limited to one, and may be plural. good.
  • the plurality of feed rollers 112, separation rollers 113, first transport rollers 114, second transport rollers 115, first discharge rollers 117 and/or second discharge rollers 118 each have a width perpendicular to the medium transport direction A1. They are arranged side by side with a gap in the direction.
  • the upper surface of the lower housing 101 forms the lower guide 101a of the medium transport path
  • the lower surface of the upper housing 102 forms the upper guide 102a of the medium transport path.
  • Arrow A1 in FIG. 2 indicates the direction of medium transport.
  • upstream refers to upstream in the medium transport direction A1
  • downstream refers to downstream in the medium transport direction A1.
  • the medium sensor 111 is arranged upstream from the feed roller 112 and the separation roller 113 .
  • the medium sensor 111 has a contact detection sensor and detects whether or not a medium is mounted on the mounting table 103 .
  • the medium sensor 111 generates and outputs a first medium signal whose signal value changes depending on whether or not the medium is mounted on the mounting table 103 .
  • the medium sensor 111 is not limited to a contact detection sensor, and any other sensor capable of detecting the presence or absence of a medium, such as a light detection sensor, may be used as the medium sensor 111 .
  • the feeding roller 112 is provided in the lower housing 101, and separates and feeds the medium placed on the placing table 103 in order from the bottom.
  • the separation roller 113 is a so-called brake roller or retard roller, is provided in the upper housing 102, is arranged to face the feeding roller 112, and rotates in the direction opposite to the medium feeding direction. Note that the feeding roller 112 is provided in the upper housing 102 and the separation roller 113 is provided in the lower housing 101, and the feeding roller 112 feeds the medium placed on the mounting table 103 in order from the top. good.
  • the first conveying roller 114 and the second conveying roller 115 are arranged on the downstream side of the feeding roller 112 so as to face each other, and convey the medium fed by the feeding roller 112 and the separation roller 113 to the imaging device 116 . do.
  • the first transport rollers 114 are provided in the lower housing 101
  • the second transport rollers 115 are provided in the upper housing 102 above the first transport rollers 114 .
  • the imaging device 116 is arranged downstream of the first transport roller 114 and captures an image of the medium transported by the first transport roller 114 .
  • the imaging device 116 includes a first imaging device 116a and a second imaging device 116b arranged to face each other with the medium transport path interposed therebetween.
  • the first imaging device 116a has a linear optical system type CIS (Contact Image Sensor) line sensor having CMOS (Complementary Metal Oxide Semiconductor) imaging elements linearly arranged in the main scanning direction.
  • the first imaging device 116a has a lens that forms an image on an imaging device, and an A/D converter that amplifies an electrical signal output from the imaging device and performs analog/digital (A/D) conversion.
  • the first imaging device 116a captures an image of the surface of the medium being conveyed, generates an input image, and outputs the input image, under the control of a processing circuit, which will be described later.
  • the second imaging device 116b has a linear optical system type CIS line sensor having CMOS imaging elements linearly arranged in the main scanning direction.
  • the second imaging device 116b also has a lens that forms an image on the imaging device, and an A/D converter that amplifies the electrical signal output from the imaging device and performs analog/digital (A/D) conversion.
  • the second image capturing device 116b captures an image of the back surface of the medium being conveyed, generates an input image, and outputs the input image, under the control of a processing circuit, which will be described later.
  • the medium transport device 100 may have only one of the first imaging device 116a and the second imaging device 116b to read only one side of the medium.
  • a line sensor of the same magnification optical system type CIS provided with the CMOS imaging device a line sensor of the same magnification optical system type CIS provided with the CCD (Charge Coupled Device) imaging device may be used.
  • a reduction optics type line sensor having a CMOS or CCD imaging device may be used.
  • the first discharge roller 117 and the second discharge roller 118 are arranged on the downstream side of the imaging device 116 so as to face each other.
  • the loaded medium is ejected onto the ejection table 104 .
  • the first discharge rollers 117 are provided in the lower housing 101
  • the second discharge rollers 118 are provided in the upper housing 102 above the first discharge rollers 117 .
  • the medium placed on the mounting table 103 moves between the lower guide 101a and the upper guide 102a in the medium conveying direction A1 by rotating the feeding roller 112 in the direction of the arrow A2 in FIG. 2, that is, in the medium feeding direction. transported towards.
  • the medium transport device 100 has, as feeding modes, a separation mode in which the medium is fed while being separated, and a non-separation mode in which the medium is fed without being separated.
  • the feeding mode is set by the user using the operation device 105 or the information processing device that communicates with the medium conveying device 100 .
  • the separation roller 113 rotates in the direction of the arrow A3, that is, in the direction opposite to the medium feeding direction, during medium feeding.
  • the medium is fed between the first transport roller 114 and the second transport roller 115 while being guided by the lower guide 101a and the upper guide 102a.
  • the medium is fed between the first imaging device 116a and the second imaging device 116b by rotating the first transport roller 114 and the second transport roller 115 in the directions of arrows A4 and A5, respectively.
  • the medium read by the imaging device 116 is ejected onto the ejection table 104 by rotating the first ejection roller 117 and the second ejection roller 118 in the directions of arrows A6 and A7, respectively.
  • FIG. 3 is a perspective view for explaining the feeding mechanism 120 of the medium conveying device 100.
  • the medium transporting device 100 has a guide member 121 and a feeding arm 122 in addition to the feeding roller 112 and the separating roller 113 as the feeding mechanism 120 .
  • the medium conveying device 100 has two feed rollers 112 and two separation rollers 113 .
  • the guide member 121 is a plate-like member, is provided on the upper surface of the lower housing 101 so as to form a medium transport surface 121a, and forms part of the lower guide 101a.
  • the guide member 121 has an opening 121b in the center in the width direction A8 orthogonal to the medium conveying direction, and the feeding roller 112 is arranged in the opening 121b.
  • the transport surface 121a of the guide member 121 has recesses 121c located on the left and right sides of the feed roller 112 with respect to the medium transport direction A1.
  • the guide member 121 has two recesses 121c.
  • the concave portion 121c is formed so that the downstream side is inclined downward with respect to the region 121d on the upstream side of the concave portion 121c of the conveying surface 121a.
  • the feeding arm 122 is provided in the upper housing 102 and arranged upstream of the separation roller 113 and in the vicinity of the separation roller 113 .
  • the feeding arm 122 has a protrusion 122a extending from the upper housing 102 side toward the lower housing 101 side, that is, extending from the separating roller 113 side toward the feeding roller 112 side.
  • the protrusions 122a are arranged on the left and right sides of the separation roller 113 with respect to the medium conveying direction A1.
  • the protrusion 122a is arranged at a position facing the opening 121b of the guide member 121.
  • the feeding arm 122 has two protrusions 122a.
  • FIG. 4 is a schematic diagram of the feeding mechanism 120 viewed from above.
  • the recessed portion 121c is provided in a region R1 that is the central portion and outside the opening portion 121b in the width direction A8. Further, the concave portion 121c is provided in a region R2 including the nip portion between the feeding roller 112 and the separation roller 113 in the medium conveying direction A1. In the example shown in FIG. 4, the upstream end P3 of the recessed portion 121c is located downstream of the upstream end of the feeding roller 112, but the recessed portion 121c is located in the medium transport direction A1. It may be provided in a region including the entire roller 112 and separation roller 113 .
  • FIG. 5 is a schematic diagram of the feeding mechanism 120 viewed from the downstream side.
  • the parts other than the projection 122a of the feeding arm 122 are omitted for better visibility.
  • the tip (lower end) of the protrusion 122 a is positioned closer to the feed roller 112 (lower side) than the nip portion between the feed roller 112 and the separation roller 113 .
  • the medium M1 fed by the feeding roller 112 and the separation roller 113 is conveyed between the projection 122a of the feeding arm 122 and the recess 121c of the guide member 121. As shown in FIG. 5 , the tip (lower end) of the protrusion 122 a is positioned closer to the feed roller 112 (lower side) than the nip portion between the feed roller 112 and the separation roller 113 .
  • the medium M1 fed by the feeding roller 112 and the separation roller 113 is conveyed between the projection 122a of the feeding arm 122 and the recess 121c of the guide member 121.
  • the projecting portion 122a has a region facing the recessed portion 121c in the medium M1 to be fed, which is located below the inner region in contact with the feeding roller 112 and the separation roller 113 and the outer region from the recessed portion 121c. push down.
  • the medium M1 to be fed is undulated in the width direction A8, so that the medium conveying apparatus 100 can provide stiffness to the medium, and reduce the rigidity of the medium traveling in the medium conveying direction A1. can be improved. Therefore, even when thin paper with low stiffness is conveyed as a medium, the medium conveying apparatus 100 can suppress the occurrence of buckling of the medium and the occurrence of jamming of the medium.
  • the medium conveying apparatus 100 can It is possible to suppress the occurrence of jams.
  • the projecting portion 122a pushes down the area facing the recessed portion 121c in the medium M1 below the inner area in contact with the feeding roller 112 and the separating roller 113 in the width direction A8.
  • the position in the height direction orthogonal to the conveying surface 121a changes between the inner area that contacts the feeding roller 112 and the separation roller 113 in the medium M1 and the outer area. Therefore, when a plurality of media are collectively set on the mounting table 103 and fed, the frictional force between the media sandwiched between the feed roller 112 and the separation roller 113 is less likely to propagate outward in the width direction A8. Become. Therefore, the medium conveying apparatus 100 can suppress the occurrence of jams of special media such as thin paper, envelopes, and copy paper while improving separation performance for normal paper such as PPC paper.
  • the area outside the recess 121 c in the width direction A8 is located closer to the feed roller 112 side (lower side) than the nip portion between the feed roller 112 and the separation roller 113 . If the conveying surface 121a is arranged above the nip portion, the medium is less likely to come into contact with the feeding roller 112, and the force for conveying the medium is reduced. By arranging the transport surface 121a below the nip portion, the medium transport device 100 can suppress a reduction in the force for transporting the medium and give the medium good stiffness.
  • a gap is provided between the tip of the protrusion 122a and the recess 121c in the height direction perpendicular to the transport surface 121a.
  • the medium is well fed between the projection 122a and the recess 121c without being blocked by the projection 122a and the recess 121c.
  • the distance W [mm] from the outer end of the feeding roller 112 to the outer end of the concave portion 121c is preferably set so as to satisfy the following formula (1).
  • W (Wc ⁇ Wr)/2>10 [mm] (1)
  • Wc is the length [mm] between both ends of the recess 121c in the width direction A8
  • Wr is the length [mm] between both ends of the feeding roller 112 in the width direction A8.
  • the length Wr between both ends in the width direction A8 of the feeding roller 112 is set to a length equal to or less than the minimum medium size width supported by the medium conveying device 100 (for example, the length of A8 size in the lateral direction).
  • the length Wc between both ends of the recess 121c in the width direction A8 is set so as to satisfy the following formula (2). (Wm ⁇ Wc)/2>10 [mm] (2)
  • Wm is the minimum medium size width of the medium to be fed, and is set to 148 [mm], which is the length in the short direction of A5 size (the length in the longitudinal direction of A6 size), for example.
  • both ends of the medium to be fed are arranged outside the concave portion 121c, and the outer region of the medium is positioned above the region facing the concave portion 121c. can be bent satisfactorily.
  • a buckling load T [gf] required to buckle the medium to be fed is calculated by the following equation (3).
  • T ⁇ 2 ⁇ E ⁇ M/L 2 (3)
  • E the Young's modulus [GPa] of the medium.
  • L is the length [mm] in the width direction A8 of the area to which the load is applied in the medium.
  • M is the area moment of inertia.
  • the cross-sectional secondary mormont M is a cross-sectional property that indicates the resistance to deformation of a member against a bending force, and is calculated by the following equation (4).
  • M H 3 ⁇ B/12 (4)
  • H is the thickness [mm] of the medium
  • B the length [mm] of the area in the medium where the load is applied in the medium transport direction A1.
  • FIG. 6 is a graph showing the relationship between the length in the width direction A8 and the buckling load for each medium.
  • graph G1 shows the buckling load of carbonless paper with a Young's modulus of 3 [GPa] and graph G2 shows the buckling load of thin paper with a Young's modulus of 2.2 [GPa].
  • the horizontal axis in FIG. 6 indicates the length [mm] of each medium in the width direction A8, and the vertical axis indicates the buckling load [gf] of each medium.
  • the length in the medium transport direction A1 of the area where the load is applied in each medium shown in FIG. 6 is 40 [mm].
  • the buckling load required to buckle the medium is inversely proportional to the square of the length in the width direction A8 of the loaded area in the medium. As shown in FIG. 6, when the length of the medium in the width direction A8 is 10 mm or less, the buckling load required to buckle the medium increases rapidly.
  • the medium conveying device 100 can be sufficiently The medium can be well buckled with a small buckling load. As a result, the medium conveying device 100 can buckle the region facing the concave portion 121c in the medium by the projection 122a and the weight of the medium without using a special pressing member. It becomes possible to attach the waist.
  • the length Wa between both ends of the two protrusions 122a in the width direction A8 is greater than the length Wr between both ends of the feed roller 112 in the width direction A8, and the minimum medium size supported by the medium transport device 100 is Set to length less than or equal to width. That is, the two protrusions 122 a are arranged outside the two feeding rollers 112 and in the vicinity of the two feeding rollers 112 . As a result, the projecting portion 122a can reliably stiffen even small-sized paper such as A5 size paper, and the medium conveying apparatus 100 can suppress the occurrence of jams of small-sized media.
  • FIG. 7 is a cross-sectional view taken along line A-A' in FIG. That is, FIG. 7 is a side view of the feeding mechanism 120 (viewed from the width direction A8).
  • the separation roller 113 is supported by the separation roller cover 123.
  • the separation roller cover 123 is attached to the upper housing 102 via an elastic member (not shown) such as a spring or rubber, and is biased downward by the elastic member. As a result, the separation roller cover 123 applies an urging force to the separation roller 113 so that the separation roller 113 presses the feeding roller 112 .
  • the feeding arm 122 is stored in the separation roller cover 123 so as to be vertically movable with respect to the separation roller cover 123 .
  • the feed arm 122 is attached inside the separation roller cover 123 via an elastic member (not shown) such as a spring or rubber, and is biased downward against the separation roller cover 123 by the elastic member.
  • the contact surface 122b of the protrusion 122a of the feeding arm 122 which contacts the medium fed by the feeding roller 112, is located upstream of the recess 121c of the feeding surface 121a of the guide member 121 in the medium feeding direction A1. formed parallel.
  • the fact that the contact surface 122b is parallel to the region 121d is not limited to being completely parallel, and means that the angle formed by the contact surface 122b and the region 121d is a predetermined angle (eg, 5°) or less. Since the contact surface 122b is formed parallel to the region 121d, the protrusion 122a can smoothly guide the medium guided by the transport surface 121a of the guide member 121 toward the downstream side.
  • the contact surface 122b is inclined so that the downstream side of the contact surface 122b sinks with respect to the area 121d (toward the feeding roller 112 side), the load that the medium receives from the protrusion 122a as the medium is conveyed is reduced.
  • the size gradually increases, and the medium conveying force decreases. Further, in this case, when the medium is transported with an inclination, the amount of load that the medium receives from the right and left protrusions 122a is different, so the inclination of the medium increases.
  • the contact surface 122b when the contact surface 122b is inclined so that the downstream side of the contact surface 122b floats (toward the separation roller 113 side) with respect to the region 121d, the force applied by the protrusion 122a to stiffen the medium is reduced.
  • the medium conveying device 100 can satisfactorily stiffen the medium while reducing the medium conveying force and suppressing the occurrence of skew of the medium. It becomes possible.
  • At least a portion of the protrusion 122a extends from the nip portion between the feed roller 112 and the separation roller 113 and the feed roller 112 from the nip portion to the medium transport direction when viewed from the width direction A8 orthogonal to the medium transport direction A1. It is arranged so as to overlap with the region on the upstream side of A1. That is, the upstream end P1 of the protrusion 122a is located downstream of the upstream end of the feed roller 112 and upstream of the nip portion between the feed roller 112 and the separation roller 113 in the medium transport direction A1. It is arranged upstream from the end of the side.
  • the medium to be fed is stiffened from before the nip portion between the feeding roller 112 and the separation roller 113 by the protrusion 122a. Therefore, the medium conveying device 100 can improve the rigidity of the medium, and can suppress the occurrence of a medium jam when the medium enters the nip portion. In addition, even if the leading end of the medium to be fed is curled upward, the curled portion is pressed by the protrusion 122a, so the medium is well guided to the nip portion between the feeding roller 112 and the separation roller 113. be.
  • downstream end P2 of the projection 122a is downstream of the straight line L1 connecting the center O1 of the feeding roller 112 and the center O2 of the separation roller 113 in the medium transport direction A1, and It is arranged upstream from the downstream end. Further, the end P2 is arranged near the end on the downstream side of the nip portion between the feed roller 112 and the separation roller 113 in the medium transport direction A1. In particular, the end P2 is located upstream of the downstream end of the nip in the medium transport direction A1. Note that the end portion P2 may be arranged downstream of the downstream end portion of the nip portion in the medium transport direction A1.
  • the medium conveying device 100 can improve the rigidity of the medium, and can suppress the occurrence of a jam of the medium while the medium is passing through the nip portion.
  • the protrusion 122a is arranged such that at least a portion thereof is located below the upper end of the feeding roller 112 in the height direction orthogonal to the conveying surface 121a.
  • the lower surface of the protrusion 122a is positioned below the upper end of the feed roller 112 by a predetermined distance T1 (for example, 0.1 mm or more and 5 mm or less).
  • FIG. 8 is a schematic diagram showing how the medium M1 is fed by the feeding mechanism 120.
  • FIG. FIG. 8 is a schematic diagram of the feeding mechanism 120 viewed from the side.
  • the outer portion of the medium M1 to be fed in the width direction A8 is pushed down by the projecting portion 122a, so that the portion facing the feeding roller 112 moves along the surface of the feeding roller 112. Stretch.
  • the medium M1 undulates in the medium conveying direction A1, so that the medium conveying apparatus 100 can give stiffness to the medium M1, and reduce the rigidity of the medium M1 traveling in the medium conveying direction A1. can be improved. Therefore, even when thin paper, envelopes, or copy paper is conveyed as a medium, the medium conveying apparatus 100 can suppress the occurrence of a jam of the medium.
  • FIG. 9 is a perspective view of the feed arm 122, the feed roller 112 and the separation roller 113 viewed from the upstream side.
  • FIG. 10 is a cross-sectional view taken along line B-B' in FIG. 10 is a side view of the feeding mechanism 120.
  • FIG. FIG. 11 is a perspective view of the feeding arm 122 viewed from the upstream side.
  • the feeding arm 122 further has a pressing roller 122c and a second protrusion 122d.
  • the pressing roller 122c faces the feed roller 112 and is arranged upstream of the nip portion between the feed roller 112 and the separation roller 113 in the medium transport direction A1.
  • the pressing roller 122c is arranged in the vicinity of the upstream end P1 of the projection 122a in the medium transport direction A1.
  • the pressing roller 122c presses the medium fed by the feeding roller 112 from above toward the feeding roller 112 side.
  • the feeding arm 122 has two pressing rollers 122c.
  • the pressing roller 122 c sandwiches the medium with the feed roller 112 and applies a conveying force to the medium fed by the feed roller 112 .
  • the medium conveying device 100 can feed the medium satisfactorily.
  • the pressing roller 122c is provided on the feeding arm 122 on which the protrusion 122a is provided, and is provided so as to move in conjunction with the protrusion 122a.
  • the medium transporting device 100 can simply control the feeding arm 122 and the pressing roller 122c, and the development cost of the medium transporting device 100 can be reduced.
  • the medium transport device 100 can reduce device cost and device weight by configuring the protrusion 122a and the pressing roller 122c as one component.
  • the central portion of the medium is pressed by the pressing roller 122c, making it easier for the outer portion of the medium to float.
  • the medium transporting apparatus 100 can prevent the side surface of the medium from contacting the rubber surface of the separation roller 113 and buckling the medium.
  • the second protrusion 122d faces the feed roller 112 and is arranged upstream of the nip portion between the feed roller 112 and the separation roller 113 in the medium transport direction A1. .
  • the second protrusion 122d is located on the separation roller 113 side (upper side) from the nip portion between the feeding roller 112 and the separation roller 113 .
  • the second protrusion 122 d guides the medium fed by the feeding roller 112 to the nip portion between the feeding roller 112 and the separation roller 113 .
  • the feeding arm 122 has two second protrusions 122d arranged to sandwich the pressing roller 122c with respect to one feeding roller 112 in the width direction A8. , and has a total of four second protrusions 122d.
  • the medium to be fed is guided to the nip portion between the feeding roller 112 and the separation roller 113 by the second protrusion 122d.
  • the medium transport device 100 can more reliably guide the medium to the nip portion.
  • the projection 122a can restrain the portion of the medium not facing the feeding roller 112 from floating while the second projection 122d restrains the floating of the portion of the medium facing the feeding roller 112. Become.
  • the medium conveying device 100 can suppress the occurrence of floating of the leading edge of the medium more effectively, and can suppress the buckling of the medium caused by the separation roller 113 flipping up the medium with the raised leading edge.
  • the second protrusion 122d is arranged so as to overlap the pressing roller 122c when viewed from the width direction A8. That is, in the medium transport direction A1, the upstream end of the second protrusion 122d is arranged near the pressing roller 122c, and the downstream end of the second protrusion 122d is positioned between the feed roller 112 and the separation roller. It is arranged near the nip portion of 113 . As a result, the second protrusion 122 d can appropriately guide the medium pressed by the pressure roller 122 c to the nip portion between the feed roller 112 and the separation roller 113 .
  • the upstream end of the second protrusion 122d is arranged downstream of the pressing roller 122c. Alternatively, the upstream end of the second protrusion 122d may be arranged upstream of the pressing roller 122c.
  • pressing roller 122c and/or the second protrusion 122d may be omitted.
  • FIG. 12 is a schematic diagram for explaining the set guide 124 and the flap 125.
  • FIG. FIG. 12 is a side view of the feeding mechanism 120 before feeding the medium.
  • the feeding mechanism 120 further has a set guide 124 and a flap 125.
  • the set guide 124 is an example of a second guide member, and is a guide for setting the medium.
  • the set guide 124 is arranged at a position facing the feed roller 112 and the separation roller 113 in the medium transport direction A1.
  • the set guide 124 is provided on the lower housing 101 so as to be able to swing (rotate) downward (in the direction of arrow A9 in FIG. 12) according to a driving force from a motor (not shown).
  • the set guide 124 is arranged at a first position (placement position in FIG. 12) for limiting contact between the medium M2 placed on the placing table 103 and the feeding roller 112 and the pressing roller 122c before the medium is fed, It supports the lower surface of the medium M2 mounted on the mounting table 103 .
  • the flap 125 is a stopper for preventing the medium M2 from entering the nip position between the feed roller 112 and the separation roller 113 before the medium is fed.
  • the flap 125 is arranged at a position facing the set guide 124 in the medium transport direction A1.
  • the flap 125 is provided on the feed arm 122 so as to be able to swing (rotate) downstream (in the direction of arrow A10 in FIG. 12), and is moved upstream (in the direction opposite to arrow A10) by a spring (not shown). pressed.
  • the flap 125 engages with the set guide 124 arranged at the first position before the medium is fed, and prevents the medium M2 from entering the nip position between the feed roller 112 and the separation roller 113 .
  • the flap 125 is provided to interlock with the feed arm 122 , and when the flap 125 is engaged with the set guide 124 , the feed arm 122 is supported by the flap 125 and the set guide 124 and below the feed arm 122 . prevented from moving to Therefore, the feeding arm 122 is accommodated within the separation roller cover 123 in FIG.
  • FIG. 13 is a schematic diagram for explaining the set guide 124 and the flap 125 during medium feeding.
  • FIG. 13 is a side view of the feeding mechanism 120 during medium feeding.
  • the set guide 124 swings downward (in the direction of arrow A9) from the transport surface 121a at the start of medium feeding.
  • the set guide 124 is arranged at the second position (placement position in FIG. 13) that allows contact between the medium M2 placed on the placing table 103 and the feeding roller 112 and the pressing roller 122c during medium feeding. and is separated from the lower surface of the medium M2 placed on the placing table 103.
  • the flap 125 By disposing the set guide 124 at the second position, the engagement between the flap 125 and the set guide 124 is released. As a result, the flap 125 is pushed by the leading edge of the medium M2 placed on the platform 103 and swings downstream (in the direction of the arrow A10). It becomes possible to enter the nip position. Thus, the flap 125 allows the medium M2 to enter the nip position between the feed roller 112 and the separation roller 113 when the set guide 124 is arranged at the second position.
  • the feeding arm 122 since the feeding arm 122 is biased downward by the elastic member, the feeding arm 122 is moved downward when the engagement between the flap 125 and the set guide 124 is released. (toward the feeding roller 112 side).
  • the amount of the medium M2 placed on the placement table 103 is sufficiently small. In this case, first, the feeding roller 112 contacts the lowest medium among the media M2 placed on the mounting table 103, and then the pressure roller 122c is placed on the mounting table 103. It contacts the uppermost medium among the mediums M2.
  • the pressure roller 122c is placed after the feed roller 112 if the amount of media placed on the placement table 103 is less than a predetermined amount. It is provided so as to come into contact with the medium placed on the table 103 .
  • the feeding roller 112 When the amount of the medium placed on the mounting table 103 is small, if the feeding roller 112 is started to rotate while the pressure roller 122c is pressing the medium, the leading edge of the medium tends to bend upward, which prevents the medium from jamming. Likely to happen.
  • the medium conveying device 100 brings the feeding roller 112 into contact with the medium before the pressing roller 122c to start feeding the medium, thereby moving the leading edge of the medium upward. It is possible to suppress the occurrence of media jams due to bending.
  • FIG. 14 is a schematic diagram for explaining the set guide 124 and the flap 125 when a large amount of media M3 are placed on the placing table 103.
  • FIG. FIG. 14 is a side view of the feeding mechanism 120 immediately after the start of medium feeding when a large amount of media M3 are placed on the mounting table 103.
  • FIG. 14 is a schematic diagram for explaining the set guide 124 and the flap 125 when a large amount of media M3 are placed on the placing table 103.
  • FIG. FIG. 14 is a side view of the feeding mechanism 120 immediately after the start of medium feeding when a large amount of media M3 are placed on the mounting table 103.
  • the set guide 124 is positioned at the second position, the engagement between the flap 125 and the set guide 124 is released, and the feeding arm 122 moves downward.
  • the feeding arm 122 is lowered before the set guide 124 is lowered. Therefore, before the feeding roller 112 contacts the lowest medium among the media M3 placed on the mounting table 103, the pressure roller 122c is pressed against the medium M3 placed on the mounting table 103. It contacts the medium arranged on the uppermost side.
  • the pressure roller 122c moves before the feed roller 112 if the amount of media placed on the placement table 103 is equal to or greater than a predetermined amount. It is provided so as to come into contact with the medium mounted on the mounting table 103 .
  • the feeding roller 112 can feed the medium satisfactorily by starting the rotation of the feeding roller 112 while the pressing roller 122c presses the medium. can.
  • the elastic member applies a larger biasing force to the medium than when the amount of the medium is small.
  • the elastic member is a compression spring
  • the magnitude of the biasing force is a multiplication value obtained by multiplying the contraction amount of the spring by the spring constant.
  • the medium transporting device 100 gives priority to the ability to feed the media, and feeds the media satisfactorily. It is possible to
  • FIG. 15 is a block diagram showing a schematic configuration of the medium conveying device 100. As shown in FIG.
  • the medium transport device 100 further includes a motor 131, an interface device 132, a storage device 140, a processing circuit 150, etc., in addition to the configuration described above.
  • the motor 131 has one or a plurality of motors, and operates the feed roller 112, the separation roller 113, the first conveying roller 114, the second conveying roller 115, the first discharge roller 117 and the first discharge roller 117 according to a control signal from the processing circuit 150. 2
  • the discharge roller 118 is rotated to convey the medium.
  • One of the first transport roller 114 and the second transport roller 115 may be a driven roller that rotates following the other roller.
  • one of the first discharge roller 117 and the second discharge roller 118 may be a driven roller that rotates following the other roller.
  • the motor 131 moves the set guide 124 between the first position and the second position according to the control signal from the processing circuit 150 .
  • the interface device 132 has an interface circuit conforming to a serial bus such as USB, for example, and is electrically connected to an information processing device (for example, personal computer, personal digital assistant, etc.) (not shown) to receive an input image and various information. Send and receive.
  • an information processing device for example, personal computer, personal digital assistant, etc.
  • a communication unit having an antenna for transmitting and receiving wireless signals and a wireless communication interface device for transmitting and receiving signals through a wireless communication line according to a predetermined communication protocol may be used.
  • the predetermined communication protocol is, for example, a wireless LAN (Local Area Network).
  • the communication unit may have a wired communication interface device for transmitting and receiving signals through a wired communication line according to a communication protocol such as a wired LAN.
  • the storage device 140 includes memory devices such as RAM (Random Access Memory) and ROM (Read Only Memory), fixed disk devices such as hard disks, or portable storage devices such as flexible disks and optical disks.
  • the storage device 140 also stores computer programs, databases, tables, and the like used for various processes of the medium transport device 100 .
  • the computer program may be installed in the storage device 140 from a computer-readable 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.
  • the processing circuit 150 operates based on a program stored in the storage device 140 in advance.
  • the processing circuit is, for example, a CPU (Central Processing Unit).
  • a DSP digital signal processor
  • LSI large scale integration
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • the processing circuit 150 is connected to the operation device 105, the display device 106, the medium sensor 111, the imaging device 116, the motor 131, the interface device 132, the storage device 140, etc., and controls these units. Based on the medium signal received from the medium sensor 111 , the processing circuit 150 performs driving control of the motor 131 , imaging control of the imaging device 116 , acquires an input image from the imaging device 116 , and outputs information via the interface device 132 . Send to processor.
  • FIG. 16 is a diagram showing a schematic configuration of the storage device 140 and the processing circuit 150.
  • FIG. 16 is a diagram showing a schematic configuration of the storage device 140 and the processing circuit 150.
  • the storage device 140 stores a control program 141, an image acquisition program 142, and the like. Each of these programs is a functional module implemented by software running on a processor.
  • the processing circuit 150 reads each program stored in the storage device 140 and operates according to each read program. Thereby, the processing circuit 150 functions as a control section 151 and an image acquisition section 152 .
  • FIG. 17 is a flow chart showing an example of the operation of the medium reading process of the medium conveying device 100.
  • control unit 151 receives an instruction to read a medium from the operation device 105 or the interface device 132 when a user inputs an instruction to read the medium using the operation device 105 or the information processing device. (step S101).
  • control unit 151 acquires a medium signal from the medium sensor 111, and determines whether or not a medium is placed on the placing table 103 based on the acquired medium signal (step S102). If no medium is placed on the placing table 103, the control unit 151 terminates the series of steps.
  • the control unit 151 drives the motor 131 to move the set guide 124 from the first position to the second position. Further, the control unit 151 drives the motor 131 to rotate the feed roller 112, the separation roller 113, the first transport roller 114, the second transport roller 115, the first discharge roller 117 and/or the second discharge roller 118. to convey the medium (step S103).
  • control unit 151 causes the imaging device 116 to image a medium, acquires an input image from the imaging device 116, and outputs the acquired input image by transmitting it to the information processing device via the interface device 132. (Step S104).
  • control unit 151 determines whether or not the medium remains on the mounting table 103 (step S105). When the medium remains on the mounting table 103, the control unit 151 returns the process to step S104 and repeats the processes of steps S104 and S105.
  • control unit 151 controls the feed roller 112, the separation roller 113, the first transport roller 114, the second transport roller 115, the first discharge roller 117 and/or the second discharge.
  • Motor 131 is controlled to stop roller 118 .
  • control section 151 controls the motor 131 to move the set guide 124 from the second position to the first position (step S106), and the series of steps ends.
  • the medium conveying device 100 provides the recess 121c in the peripheral area of the feeding roller 112 on the medium conveying surface 121a. Further, the medium conveying device 100 is provided with a protrusion 122 a that guides the area of the medium outside the feed roller 112 toward the feed roller 112 from the nip portion between the feed roller 112 and the separation roller 113 . As a result, the medium conveying device 100 can suppress the occurrence of a medium jam when various types of media such as thin paper, envelopes, and copy paper are conveyed. Therefore, the medium transport device 100 can appropriately feed multiple types of media.
  • the medium conveying device 100 can convey bound media such as envelopes or copy paper.
  • the medium transport device 100 can continuously transport a plurality of envelopes, copy sheets, or the like.
  • the user does not need to change the setting of the feeding mode when conveying bound media such as envelopes or copy paper, and the medium conveying apparatus 100 can improve user convenience. It has become possible.
  • FIG. 18 is a schematic diagram for explaining a projection 222a in a medium conveying device according to another embodiment.
  • FIG. 18 is a schematic diagram of the feeding mechanism 220 viewed from the downstream side. In FIG. 18, the parts other than the projection 222a of the feeding arm are omitted for better visibility.
  • the medium transport device has a feeding mechanism 220 instead of the feeding mechanism 120, and the feeding mechanism 220 has a protrusion 222a instead of the protrusion 122a.
  • the protrusion 222a has a configuration similar to that of the protrusion 122a.
  • the tip (lower end) of the protrusion 222a has a rounded shape. That is, the contact surface of the protrusion 222a that contacts the medium fed by the feeding roller 112 has an R shape.
  • the medium conveying device can prevent the carbonless paper from coming into contact with the tip of the protrusion 222a and developing color.
  • the medium conveying device can suppress the occurrence of vertical streaks on the medium due to the tip of the protrusion 222a.
  • the medium conveying device can appropriately feed a plurality of types of media even when using the protrusion 222a having an R shape.
  • FIGS. 19(a) and 19(b) are schematic diagrams for explaining projections 322a in a medium transporting device according to still another embodiment.
  • 19A and 19B are schematic diagrams of the feeding mechanism 320 viewed from the downstream side.
  • the display of parts other than the projection 322a of the feeding arm is omitted in order to improve visibility.
  • FIG. 19(a) shows how a medium M5 with low rigidity such as thin paper or copy paper is fed
  • FIG. 19(b) shows how a medium M6 with high rigidity such as thick paper is fed. indicate.
  • the medium transporting device has a feeding mechanism 320 instead of the feeding mechanism 120, and the feeding mechanism 320 replaces the protrusion 122a.
  • the feeding mechanism 320 replaces the protrusion 122a.
  • the protrusion 322a has a configuration similar to that of the protrusion 122a.
  • the projecting portion 322a includes a fixed portion 322e and a movable portion 322f.
  • the fixed part 322e and the movable part 322f are made of rigid material such as metal.
  • the fixing portion 322e is fixed to the feeding arm.
  • the movable portion 322f is supported by the fixed portion 322e via an elastic member 322g so as to be able to swing outward in the width direction A8 (in the direction of the arrow A11).
  • the elastic member 322g is a torsion coil spring or the like. , toward the inside of the width direction A8 (the direction opposite to the arrow A11).
  • the medium conveying device 100 can stiffen the medium M5 having low rigidity, and improve the rigidity of the medium M5 traveling in the medium conveying direction A1.
  • the protrusion 322a swings outward in the width direction A8 (in the direction of the arrow A11) due to the medium M6. Therefore, the medium transporting device 100 can prevent the medium M6, which has a high rigidity, from being deformed by the protrusion 322a and damaging the medium M6. For the medium M6 having high rigidity, the possibility of buckling and jamming of the medium is sufficiently low even if the protrusion 322a does not stiffen the medium.
  • the protrusion 322a has elasticity as a whole.
  • the medium conveying device can suppress the occurrence of damage to the high-rigidity medium while suppressing the occurrence of a jam of the low-rigidity medium.
  • the protrusion 322a may be integrally formed of a flexible material such as rubber or resin.
  • the protrusion 322a is integral and has elasticity.
  • the medium conveying device can suppress the occurrence of damage to the high-rigidity medium while suppressing the occurrence of a jam of the low-rigidity medium.
  • the projecting portion 322a is integrally formed, the medium transporting device can reduce the device cost and the device weight.
  • the medium conveying device can appropriately feed a plurality of types of medium even when using the elastic protrusions 322a.
  • FIGS. 20(a) and 20(b) are schematic diagrams for explaining a guide member 421 in a medium conveying device according to still another embodiment.
  • 20A and 20B are schematic diagrams of the feeding mechanism 420 viewed from the downstream side.
  • the display of portions other than the protrusion 122a of the feeding arm 122 is omitted in order to improve visibility.
  • FIG. 20(a) shows how a light medium M7 such as thin paper or copy paper is being fed
  • FIG. 20(b) shows how a heavy medium M8 such as thick paper is being fed.
  • the medium transporting device has a feeding mechanism 420 instead of the feeding mechanism 120, and the feeding mechanism 420 replaces the guide member 121. It has a guide member 421 at the end. Guide member 421 has a configuration similar to that of guide member 121 .
  • the guide member 421 has a moving portion 421d arranged outside in the width direction A8 orthogonal to the medium conveying direction from the concave portions 421c located on the left and right sides of the feeding roller 112 with respect to the medium conveying direction A1.
  • An elastic member 421 e is provided between the moving portion 421 d and the base of the guide member 421 .
  • the elastic member 421e is a compression coil spring, rubber, or the like, and applies an upward force (in the direction of arrow A12) to the moving portion 421d.
  • the moving portion 421d pushes back the elastic member 421e due to the weight of the medium present on the moving portion 421d, and moves downward. That is, the moving part 421d is provided so as to be movable in the direction orthogonal to the transport surface 421a according to the weight of the medium to be fed.
  • the moving portion 421d is placed at a higher position, and the step between the upper surface of the moving portion 421d and the recessed portion 421c becomes sufficiently large. Therefore, the medium conveying device can sufficiently stiffen the medium M7.
  • a heavy medium M8 such as cardboard is fed, the position of the moving portion 421d is lowered, and the step between the upper surface of the moving portion 421d and the recess 421c is sufficiently small. Therefore, the medium conveying device can prevent the medium M8 from being deformed by the concave portion 421c and causing damage to the medium M8.
  • the moving portion 421d is arranged at the first position (placement position shown in FIG. 20A) higher than the upper surface of the feed roller 112. .
  • the level difference between the upper surface of the moving portion 421d and the concave portion 421c becomes sufficiently large. It is possible to attach
  • the moving part 421d can move between a first position higher than the upper surface of the feeding roller 112 and a second position lower than the upper surface of the feeding roller 112 in the direction A12 perpendicular to the conveying surface 421a. be provided.
  • the medium transport device can appropriately feed multiple types of media.
  • FIG. 21(a) is a schematic diagram for explaining a feeding arm 522 in a medium transporting device according to still another embodiment.
  • the medium transporting device has a feeding mechanism 520 instead of the feeding mechanism 120, and the feeding mechanism 520 has a feeding mechanism instead of the feeding arm 122. It has an arm 522 .
  • the feeding arm 522 has a configuration similar to that of the feeding arm 122 .
  • the feed arm 522 has a protrusion 522a, a pressure roller 522c and a base 522e.
  • the base 522e is provided so as to be fixed to the upper housing 102 .
  • the projecting portion 522a and the pressing roller 522c have the same configurations as the projecting portion 122a and the pressing roller 122c of the feed arm 122, respectively.
  • the projecting portion 522a is supported by the base portion 522e via the first elastic member 522h.
  • the first elastic member 522h is a compression coil spring, rubber, or the like, and applies downward force to the protrusion 522a.
  • the pressing roller 522c is supported by the base portion 522e via the second elastic member 522i.
  • the second elastic member 522i is a compression coil spring, rubber, or the like, and applies downward force to the pressing roller 522c.
  • the pressing roller 522c is supported by the base 522e via the second elastic member 522i separate from the first elastic member 522h provided between the base 522e and the protrusion 522a. Thereby, the pressing roller 522c is provided so as to move independently of the protrusion 522a.
  • the medium conveying device can satisfactorily convey a medium with high rigidity such as thick paper while suppressing the occurrence of a jam of medium with low rigidity such as thin paper.
  • the protrusion 522a may be provided downstream of the pressure roller 522c in the medium transport direction A1.
  • the pressing roller moves in conjunction with the protrusion, when a thick medium such as cardboard is transported and then a thin medium is transported, the trailing edge of the preceding medium pushes up the protrusion, and accordingly, The pressure roller can rise and clear the leading edge of the following media.
  • the pressure roller 522c moves independently of the protrusion 522a, even if the protrusion 522a is pushed up by the preceding medium, the pressure roller 522c does not rise and continues to press the following medium. Therefore, even when a plurality of media having different thicknesses are continuously fed, the medium feeding device can feed each medium satisfactorily.
  • the medium conveying device can appropriately feed a plurality of types of media even when the pressing roller 522c is provided to move independently of the protrusion 522a. rice field.
  • FIG. 21(b) is a schematic diagram for explaining a feed arm 622 in a medium transport device according to still another embodiment.
  • the medium transporting device has a feeding mechanism 620 instead of the feeding mechanism 520, and the feeding mechanism 620 has a feeding mechanism instead of the feeding arm 522. It has an arm 622 .
  • the feeding arm 622 has a configuration similar to that of the feeding arm 522 .
  • the feeding arm 622 has a protrusion 622a, a pressing roller 622c and a base 622e.
  • the base 622 e is provided to be fixed to the upper housing 102 .
  • the protrusion 622a, the pressure roller 622c and the base 622e have the same configurations as the protrusion 522a, the pressure roller 522c and the base 522e of the feeding arm 522, respectively.
  • the projecting portion 622a is supported by the base portion 622e via the first elastic member 622h.
  • the first elastic member 622h is a compression coil spring, rubber, or the like, and applies downward force to the protrusion 622a.
  • the pressing roller 622c is supported by a member including the protrusion 622a via a second elastic member 622i.
  • the second elastic member 622i is a compression coil spring, rubber, or the like, and applies downward force to the pressing roller 622c.
  • the pressing roller 622c is provided so as to move independently of the protrusion 622a. Therefore, the medium conveying device can satisfactorily convey a medium with high rigidity such as thick paper while suppressing the occurrence of a jam of medium with low rigidity such as thin paper. In addition, the medium conveying device can satisfactorily convey each medium even when a plurality of media having different thicknesses are continuously fed.
  • the medium conveying device can appropriately feed a plurality of types of media even when the pressing roller 622c is provided to move independently of the protrusion 622a. rice field.
  • the feeding arm 522 or the feeding arm 622 may further have a second protrusion similar to the second protrusion 122d.
  • the second protrusion is provided so as to move in conjunction with the protrusion 522a or the protrusion 622a and move independently of the pressing roller 522c or the pressing roller 622c.
  • FIG. 22 is a schematic diagram for explaining a guide member 721 in a medium conveying device according to still another embodiment.
  • the medium conveying device has a feeding mechanism 720 instead of the feeding mechanism 120, and the feeding mechanism 720 has a guide member 721 instead of the guide member 121.
  • the guide member 721 has a configuration similar to that of the guide member 121 .
  • the guide member 721 has an opening 721b similar to the opening 121b, and the conveying surface 721a of the guide member 721 has a recess 721c similar to the recess 121c.
  • the opening 721b is smaller than the opening 121b, and the recess 721c extends to the vicinity of the feeding roller 112 in the width direction A8. Therefore, the protrusion 122a is arranged at a position facing the recess 721c.
  • the medium conveying device can appropriately feed multiple types of media even when the protrusion 122a is arranged at a position facing the recess 721c.
  • FIG. 23 is a schematic diagram for explaining a guide member 821 in a medium conveying device according to still another embodiment.
  • the medium conveying device has a feeding mechanism 820 instead of the feeding mechanism 120, and the feeding mechanism 820 has a guide member 821 instead of the guide member 121.
  • Guide member 821 has a configuration similar to that of guide member 121 .
  • a conveying surface 821a of the guide member 821 has a recess 821c similar to the recess 121c.
  • the guide member 821 does not have the opening 121b, but instead has a notch 821b.
  • the feeding roller 112 is arranged in the notch 821b, and the protrusion 122a is arranged at a position facing the notch 821b.
  • the medium conveying device can appropriately feed a plurality of types of medium even when the guide member 821 has the notch portion 821b.
  • FIG. 24 is a schematic diagram for explaining a guide member 921 in a medium conveying device according to still another embodiment.
  • the medium conveying device has a feeding mechanism 920 instead of the feeding mechanism 820, and the feeding mechanism 920 has a guide member 921 instead of the guide member 821.
  • Guide member 921 has a configuration similar to that of guide member 821 .
  • the guide member 921 has a cutout portion 921b similar to the cutout portion 821b, and the conveying surface 921a of the guide member 921 has a recessed portion 921c similar to the recessed portion 821c.
  • the cutout portion 921b is smaller than the cutout portion 821b, and the recessed portion 921c extends to the vicinity of the feeding roller 112 in the width direction A8. Therefore, the protrusion 122a is arranged at a position facing the recess 921c.
  • the medium conveying device can appropriately feed a plurality of types of media even when the guide member 921 has the notch portion 921b and the protrusion portion 122a is arranged at a position facing the recess portion 921c. It was possible to send
  • FIG. 25 is a diagram showing a schematic configuration of a processing circuit 1050 in a medium conveying device according to still another embodiment.
  • the processing circuit 1050 is used in place of the processing circuit 150 of the medium conveying device 100 and performs medium reading processing and the like instead of the processing circuit 150 .
  • the processing circuit 1050 has a control circuit 1051, an image acquisition circuit 1052, and the like. Each of these units may be composed of an independent integrated circuit, microprocessor, firmware, or the like.
  • the control circuit 1051 is an example of a control unit and has the same function as the control unit 151.
  • the control circuit 1051 receives an operation signal from the operation device 105 or the interface device 132 and a medium signal from the medium sensor 111 .
  • the control circuit 1051 controls the motor 131 based on the received information.
  • the image acquisition circuit 1052 is an example of an image acquisition unit and has the same function as the image acquisition unit 152.
  • the image acquisition circuit 1052 acquires an input image from the imaging device 116 and outputs it to the interface device 132 .
  • the medium transport device can appropriately feed multiple types of media.
  • 100 medium conveying device 103 mounting table, 112 feeding roller, 113 separating roller, 121, 421 guide member, 121a conveying surface, 121b opening, 121c, 421c recess, 121b, 721b opening, 122, 522, 622 feeding Arm 122a, 222a, 322a, 522a, 622a Protrusion 122b Contact surface 122c, 522c, 622c Pressure roller 122d Second protrusion 124 Set guide 421d Moving part 821b, 921b Notch

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PCT/JP2021/022726 2021-06-15 2021-06-15 媒体搬送装置 Ceased WO2022264278A1 (ja)

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JP2023528816A JP7506262B2 (ja) 2021-06-15 2021-06-15 媒体搬送装置
PCT/JP2021/022726 WO2022264278A1 (ja) 2021-06-15 2021-06-15 媒体搬送装置
US18/568,746 US12415692B2 (en) 2021-06-15 2021-06-15 Medium conveyance device
JP2024096177A JP2024107420A (ja) 2021-06-15 2024-06-13 媒体搬送装置
US19/310,640 US20250388419A1 (en) 2021-06-15 2025-08-26 Medium conveyance device
JP2025169427A JP2025182090A (ja) 2021-06-15 2025-10-07 媒体搬送装置

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US20240262643A1 (en) 2024-08-08
US12415692B2 (en) 2025-09-16
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